JP4090194B2 - Grease grease dripping prevention device for leaf spring support - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle having a leaf spring type suspension device and supplying grease to a leaf spring support portion. More specifically, it relates to prevention of grease dripping in a vehicle in which parts such as exhaust pipes and spare tires are arranged below the greasing part, and the grease may fall on the exhaust pipe etc. .
[0002]
[Prior art]
It has a leaf spring type suspension device, lubricates the leaf spring support part, and parts such as exhaust pipes and spare tires are arranged below this greasing part. FIG. 23 (side view) and FIG. 24 (plan view) show the layout of the vehicle suspension system and the exhaust pipe that may be subjected to grease. And the detail of the support part of a leaf spring is shown in FIG. 25 as a three-dimensional figure.
[0003]
23 and 24, the mounted engine (not shown) is a V-type engine, and the front end portions of the first exhaust pipe E1 and the second exhaust pipe E2 are connected to left and right exhaust outlets (not shown) of the engine, respectively. Yes. The rear ends of the first exhaust pipe E1 and the second exhaust pipe E2 are connected to the silencer M, respectively.
Above the first exhaust pipe E1 and the second exhaust pipe E2, support portions for the suspension leaf springs 5, 5; 5 ', 5' are arranged.
[0004]
Here, the support portion of the leaf spring is configured as shown in FIG. The support portion of the leaf spring shown in FIG. 25 shows the suspension device on the left side of the vehicle, and the direction of arrow F in FIG. 25 is the front of the vehicle.
In FIG. 25, upper support holes 4D and 4D and lower support holes 4E are formed in an H-shaped shackle 4 formed by left and right swing arms 4A and 4B and a connecting portion 4C connecting the swing arms 4A and 4B. 4E are provided, and spring pins 7A and 7B are stopped in each hole by means not shown.
[0005]
In the portion sandwiched between the left and right swing arms 4A and 4B, the spring pin 7A rotatably supports the shackle 4 around a pin support boss hole of a spring bracket (not shown) on the frame side. . The spring pin 7B supports the leaf spring 5 rotatably in a hole 5B provided in an eyeball portion 5A formed at the end of the leaf spring 5.
Therefore, the shackle 4 swings at an angle α with the axis of the spring pin 7A as the rotation center due to the movement of the leaf spring generated during traveling.
[0006]
Grease is supplied to the gap between the outer periphery of the spring pin 7B and the hole 5B of the leaf spring eyeball portion by means not shown for lubrication. Since the grease is generally supplied in a multiplicity, the excess amount hangs downward from the gap between the left and right swing arms 4A and 4B and the end surface of the hole 5B of the eyeball portion.
[0007]
Conventionally, as the grease sag prevention device, a grease reservoir 1 constituted by a tray portion 2 and two stay portions 3 that are fixed to the upper surface of the tray portion and extend upward is provided by the two stay portions 3. The shackle rocking arm 4A has a structure in which the system is stopped by means (not shown) so as to sandwich the front and rear end surfaces of the lower portion.
[0008]
[Problems of the prior art]
However, since the grease sag prevention device is fixed to the shackle 4, the device oscillates in the same manner as the shackle 4, and the angle α formed between the shackle 4 and the vertical line as shown in FIG. When it became larger than that at the time of bouncing (FIG. 26-1 in FIG. 26) (FIG. 26-2 in FIG. 26), the saucer portion 2 was also inclined, and a situation in which the saucer portion could not be covered by the dripping grease occurred .
Further, in order to cover even if α becomes large, the tray 2 becomes large, and there are many cases where the layout of the shackle peripheral parts is hindered.
In FIG. 26, reference numeral g denotes a grease drop, and a grease dripping range is indicated by reference numeral 8.
[0009]
[Problems to be solved by the invention]
The present invention has been proposed in view of the above-described problems of the prior art, and can cover grease leakage for all movements of a leaf spring as a suspension without affecting the layout of shackle peripheral components. It is an object of the present invention to provide a grease grease dripping prevention device for a leaf spring support.
[0010]
[Means for Solving the Problems]
A grease spring dripping prevention device for a leaf spring support portion according to the present invention is a grease droop prevention device for a leaf spring support portion by a spring pin (7) via a shackle (4) of a leaf spring type suspension device. A grease reservoir (1) provided with a stepped tray (2) formed in a shape and a flange (22, 23) extending upward from the periphery of the tray (2), the tray (2) The notch (26 ') for escaping the rivet (55) is provided in the upper step (2a), and the flanges (22, 22) on both sides of the upper step (2a) are extended upward, and the extension (27, 27) are each provided with mounting holes (25 ', 25'), a leaf spring clip (54) is threaded through the mounting hole (25 ') and screw (19). The grease reservoir (1) is fastened to the clip (54), and a range (8) in which the grease hangs from the bound position to the rebound position of the leaf spring (5) is covered with the tray (2). Yes.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the details of the embodiment of the present invention will be described with reference to FIGS.
[0015]
First, a first embodiment of the present invention will be described with reference to FIGS.
The grease reservoir 1 includes a tray portion 2 having a Z-shaped cross section composed of an upper step 2a, a hypotenuse 2b, and a lower step 2c, and a peripheral portion of the tray portion 2 (that is, one side of both side surfaces and the end of the lower step 2c). Are formed by flanges 22, 22, and 23 extending upward from three consecutive sides), and an attachment hole 24 is provided at an end on the upper stage 2 a side.
On the other hand, the leaf spring 5 includes a first leaf 51, a second leaf 52, a third leaf 53, a U-shaped clip 54 that opens the top of the three leaves, and this clip as a third leaf. And rivets 55 to be fastened.
The rivet 55 is configured to fasten the grease reservoir 1 to the third leaf 53 of the leaf spring 5 through the hole 24.
In the illustrated embodiment, a spring having three leaves is shown, but the present invention can also be implemented for a two-leaf spring, a four-leaf spring, or a spring having five or more leaves. .
[0016]
4 to 6 show a modification of the embodiment of FIGS.
4 to 6, the basic shape is the same as that of the embodiment (first embodiment) of FIGS. 1 to 3, and only the attachment method of the leaf spring 5 to the clip 54 is different.
That is, in the embodiment shown in FIGS. 4 to 6, the clip 54 has female threads (not shown) formed on both sides of the rivet mounting position on the lower surface of the clip. At the end of the upper portion 2a of the grease reservoir 1, mounting holes 25, 25 are drilled at the same pitch as this, and in the center of the mounting holes 25, 25, there are cuts for escaping the rivets 55. A notch 26 is formed.
When the grease reservoir 1 is attached to the clip 54 of the leaf spring 5, the grease reservoir 1 is fastened to the clip 54 with screws 19 and 19.
[0017]
7 to 9 also show modifications of the first embodiment shown in FIGS. Accordingly, the basic configuration of the embodiment of FIGS. 7 to 9 is the same as that of the first embodiment of FIGS.
However, the embodiment shown in FIGS. 7 to 9 is different from the first embodiment shown in FIGS. 1 to 3 in the manner in which the grease reservoir 1 is attached to the clip 54 of the leaf spring 5.
7 to 9, in the grease reservoir 1, the flanges 22 formed on both side edges of the upper step portion 2a are extended upward, and mounting holes 25 'and 25' are drilled at two locations of the extension portions 27 of the flanges. is doing. Further, the upper step 2a is provided with a notch 26 'for escaping the rivet 55 on the leaf spring side.
The clip 54 has a hole in which a female screw is cut on the inner peripheral surface at a position corresponding to the two mounting holes 25 ′ and 25 ′ of the flange 22 (not clearly shown in FIGS. 7 to 9). Is formed.
When the grease reservoir 1 is attached to the clip 54, the grease reservoir 1 is fastened to the clip 54 with screws 19 and 19.
[0018]
Next, a second embodiment will be described with reference to FIGS.
The grease reservoir 1 includes a tray portion 2 having a Z-shaped cross section composed of an upper step 2a, a hypotenuse 2b, and a lower step 2c, and a peripheral portion of the tray portion 2 (ie, both sides and one end of the lower step 2c) It is comprised by the flanges 22, 22, and 23 extended upward from 3 continuous sides).
And in the front-end part of the flanges 22 and 22, one part is extended upwards and comprises a pair of stay parts 27a and 27a. The tip ends of the pair of stay portions 27a and 27a are bent so as to face each other to form horizontal portions 27b and 27b.
Here, the height H of the stay portion is equal to the total plate thickness of the attachment position of the leaf spring 5.
[0019]
On the other hand, at the attachment position of the third leaf 53 of the leaf spring 5 (which is attached to the third leaf 53 in the illustrated embodiment, it may be attached to one of the constituent leaves), but the stay portion Parallel portions 56 and 56 having a distance equal to the plate width of 27a and 27a are secured. And the protrusions 57 and 57 are provided in the right and left two places (or two places of left and right) so that the stay parts 27a and 27a can be prevented from being displaced before and after the parallel parts 56 and 56, respectively. .
[0020]
When the grease reservoir 1 is attached to the leaf spring 5, the stay portions 27 a and 27 a are engaged (or located) with the parallel portions 56 and 56. As a result, the leaf spring 5 is sandwiched by the stay portions 27 a and 27 a and the horizontal portions 27 b and 27 b from each leaf side surface to a part of the leaf top surface, and the grease reservoir 1 is attached to the leaf spring 5.
[0021]
Next, a third embodiment of the present invention will be described with reference to FIGS.
In this third embodiment, the grease reservoir 1 includes a rectangular tray portion 2 and flanges 22, 22; 23, 23 that extend upward from the peripheral edge (four sides) of the tray portion 2.
A pair of stays 30, 30 are erected from the upper surface of the tray portion 2 at a distance slightly larger than the plate width of the leaf spring 5. The pair of stays 30 and 30 are bent at a right angle so that the tips thereof are opposed to each other.
A stopper 40 is erected on the upper surface of the tray portion 2 behind the pair of stays 30, 30.
[0022]
The pair of stays 30, 30 sandwich the side surfaces of the leaves 51, 52, 53 and the upper surface of the first leaf 51.
At the distal ends 30a and 30a of the bent stays, retaining portions 30b and 30b that come into contact with the outer peripheral surface 51b of the spring eyeball portion 51a are formed. The retaining portions 30b and 30b are formed by bending the tips 30a and 30a of the stays at an acute angle in the width direction of the leaf to prevent the grease reservoir 1 from shifting upward with respect to the leaf spring, and to prevent the grease reservoir 1 has the effect of preventing the leaf spring from slipping out of the leaf spring.
The stopper 40 is constructed so as to stand upright from the upper surface of the tray portion 2 so as to prevent displacement in the direction opposite to the removal direction, and abuts against the plate end 53a of the third leaf 53 (in the illustrated embodiment, 3). Although it is in contact with the plate end 53a of the number leaf 53, it may be in contact with the plate end of any one of the constituent leaves), and the deviation in the direction opposite to the direction in which it escapes from the leaf spring of the grease reservoir 1 Is preventing.
[0023]
Here, as the slightly larger distance (the distance between the pair of stays 30 and 30), for example, if the leaf width of the leaf spring 5 is W,
W + 2mm to W + 5mm
A range of is desirable.
[0024]
FIGS. 16-18 has shown the modification of 3rd Embodiment of FIGS. 13-15.
The embodiment shown in FIGS. 16 to 18 and the embodiment shown in FIGS. 13 to 15 are provided with a mechanism for preventing misalignment (in the direction of arrow F in FIG. 16) opposite to the slipping direction (the stopper 40 in the third embodiment in FIGS. 13 to 15). The configuration having the same function as in FIG.
At the tip of the second leaf 52 and the third leaf 53 (including the fourth leaf if a four-taper leaf spring is included, but excluding the multi-leaf spring), a width trimming portion that is narrower than the full width of the leaf 52c, 52c; 53c, 53c are provided. The width cutting portions 52c, 52c; 53c, 53c and the full width portion are continuous through the changing portions 52d, 52d; 53d, 53d.
[0025]
The distance between the left and right stays 30 and 30 located on the side surfaces of the second leaf 52 and the third leaf 53 (including the fourth leaf if it is a four-taper leaf spring, but excluding the multi-leaf spring) is the width cutting The stays 30 and 30 are configured to be narrow with steps so as to be the same as the portions 52c and 52c; 53c and 53c.
By configuring in this way, the front end portion 30e of the stay 30 and the width changing portion 52d of the second leaf 52 are in contact with each other, thereby preventing a shift in the reverse direction (direction of arrow F in FIG. 16).
[0026]
Next, a fourth embodiment is shown in FIGS.
The fourth embodiment and the first embodiment of FIGS. 19 to 21 are different in the attachment location to the leaf spring and the fastening member. For details of the grease reservoir, the fourth embodiment of FIGS. 19 to 21 is the same as the first embodiment.
In the middle of the leaf end 53a of the third leaf 53 of the leaf spring (the edge of the fourth leaf in the case of a four-taper leaf spring) and the clip 54, as shown in FIG. A bolt hole 53h having a countersink is formed on the upper surface side. And the grease reservoir 1 is comprised so that it may attach to the back surface 53b (The back surface of the 4th leaf if it is a 4 piece taper leaf spring) with the countersunk head bolt 19a.
[0027]
FIG. 22 is a diagram showing the movement of the leaf spring 5 and the positional relationship of the grease reservoir 1 in the apparatus according to the present invention (the embodiment described above).
22 in FIG. 22 shows the state at the time of bounding, and FIG. 22-2 in FIG. 22 shows the state at the time of rebounding. As is apparent from FIG. 22, the grease dripping in the region in the front direction of the spring that could not be covered by the conventional technique (see FIG. 26) can be reliably captured.
In FIG. 22, reference numeral g denotes a grease drop, and a grease dripping range is indicated by reference numeral 8.
[0028]
【The invention's effect】
As described above, according to the present invention, the relative positional relationship between the leaf spring support portion and the grease reservoir is no matter how the leaf spring as the suspension moves without affecting the layout of the peripheral parts of the shackle. Therefore, even if the grease supplied to the leaf spring support portion drops, it is reliably captured by the grease reservoir. Therefore, it is possible to prevent the dropped grease from being removed from the grease reservoir and contaminating the lower part of the leaf spring.
Furthermore, since it is not necessary to increase the size of the grease reservoir 1 when preventing various disadvantages due to grease dripping, even if the present invention is implemented, it does not interfere with various devices.
In the illustrated embodiment, a spring having three leaves is described. However, the number of leaves of a vehicle spring differs depending on the application, and the present invention can be applied to a spring having two leaves or a spring having four or more leaves.
[Brief description of the drawings]
FIG. 1 is a three-dimensional view when a grease reservoir is fastened together with a rivet on a back surface of a leaf spring clip in the first embodiment.
FIG. 2 is a side view of FIG. 1 including a leaf spring.
3 is a plan view of FIG. 1 including a leaf spring. FIG.
FIG. 4 is a three-dimensional view when the grease reservoir is attached to the back surface of the clip of the leaf spring with two screws in the first embodiment.
5 is a side view of FIG. 4 including a leaf spring.
6 is a plan view of FIG. 4 including a leaf spring. FIG.
FIG. 7 is a three-dimensional view when the grease reservoir is attached to the side surface of the leaf spring clip with two screws in the first embodiment.
FIG. 8 is a side view of FIG. 7 including a leaf spring.
9 is a plan view of FIG. 7 including a leaf spring.
FIG. 10 is a three-dimensional view showing a second embodiment.
FIG. 11 is a view including a leaf spring in the side view of FIG. 10. FIG. 12 is a plan view including the leaf spring in FIG. 10. FIG. Figure.
14 is a plan view corresponding to FIG.
15 is a front view with respect to FIG.
FIG. 16 is a side view in the case where a stay for preventing slippage in the direction opposite to the removal direction is not added in the third embodiment.
FIG. 17 is a plan view with respect to FIG. 16;
18 is a front view with respect to FIG.
FIG. 19 is a side view showing a fourth embodiment.
20 is a plan view corresponding to FIG.
FIG. 21 is a front view with respect to FIG. 19;
FIGS. 22A and 22B are diagrams showing a leaf spring motion state and a range of grease dripping into the grease reservoir according to the embodiment of the present invention, in which FIG. 22A shows a loaded state and FIG. 22B shows a non-loaded state.
FIG. 23 is a side view showing a layout of a front shaft suspension device and an exhaust pipe.
24 is a plan view corresponding to FIG. 23. FIG.
FIG. 25 is a three-dimensional view of a conventional grease grease dripping prevention device.
FIG. 26 is a diagram illustrating a positional relationship between a grease drooping range and a grease reservoir corresponding to the motion state of the leaf spring, corresponding to FIG. 25, (a) when loaded and (b) showing a non-loaded state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Grease reservoir 2 ... Dish part 22, 23 ... Flange 24 ... Mounting hole 5 ... Leaf spring 53 ... 3rd leaf 54 ... Clip 7 ... Spring pin

Claims (1)

  In the grease sag prevention device of the leaf spring support portion by the spring pin (7) through the shackle (4) of the leaf spring type suspension device, the stepped tray receiving portion (2) having a Z-shaped cross section, A grease reservoir (1) having flange portions (22, 23) extending upward at the periphery of the tray portion (2) is provided, and the rivet (55) escapes to the upper stage portion (2a) of the tray portion (2). A notch (26 ') is provided, and flanges (22, 22) on both sides of the upper stage (2a) are extended upward, and mounting holes (25', 25 ') are respectively formed in the extensions (27, 27). And the grease reservoir (1) is fastened to the clip (54) by the screw (19) through the mounting hole (25 ') through a screw hole in the clip (54) of the leaf spring. Pulling (5) leaf spring supporting portion of the grease dripping prevention apparatus characterized by range drip from the bound positions grease in the state until the rebound position (8) are covered by the saucer section (2) of the.

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