CN219841018U - Worm gear clearance adjusting device and speed reducer - Google Patents

Abstract

The utility model provides a worm and gear clearance adjusting device and a speed reducer, wherein the worm and gear clearance adjusting device comprises a fixed seat, a sliding block and a plate spring structure, wherein the sliding block is movably arranged on the fixed seat, the sliding block is used for being sleeved at one end of a worm, the plate spring structure is arranged on the fixed seat, and the plate spring structure is used for being abutted against one side, far away from a worm wheel meshed with the worm, of the sliding block, so that the sliding block drives the worm to move towards a direction close to the worm wheel. When a gap appears between the meshing tooth surfaces of the worm wheel and the worm, the plate spring structure can push the sliding block to move along the direction of the worm close to the worm wheel, so that the gap between the meshing tooth surfaces of the worm wheel and the worm is reduced, the effect of eliminating the transmission gap between the worm wheel and the worm is achieved, the force transmission performance is further ensured, the worm wheel and the worm are prevented from being meshed to collide with abnormal noise, and the comfort of a driver is improved.

Description

Worm gear clearance adjusting device and speed reducer

Technical Field

The utility model relates to the technical field of automobile parts, in particular to a worm and gear clearance adjusting device and a speed reducer.

Background

The speed reducer mechanism is the most critical part mechanism in the automobile electric power steering gear, a worm wheel and a worm are arranged in the speed reducer mechanism, the worm wheel and the worm can be worn after being meshed for a long time, a gap is formed between meshing tooth surfaces of the worm wheel and the worm, which can cause relative fixation of a rotating shaft core, the force transmission performance can be affected, and in the process of steering wheel reversing and vehicle passing through concave-convex road conditions, abnormal noise caused by meshing collision of the worm wheel and the worm can be caused, so that a driver feels uncomfortable.

Disclosure of Invention

The utility model solves the problem of how to adjust the gap between the worm wheel and the worm.

In order to solve the problems, the utility model provides a worm gear clearance adjusting device which comprises a fixed seat, a sliding block and a plate spring structure, wherein the sliding block is movably arranged on the fixed seat, the sliding block is used for being sleeved at one end of a worm, the plate spring structure is arranged on the fixed seat, and the plate spring structure is used for being propped against one side, away from a worm wheel meshed with the worm, of the sliding block, so that the sliding block drives the worm to move towards a direction approaching to the worm wheel.

The utility model has the technical effects that: the fixing base can be fixedly arranged in the speed reducer, the fixing base and the worm are positioned on the same side of the worm wheel, the sliding block is movably arranged on the fixing base, the sliding block can be sleeved at one end of the worm, the plate spring structure is also arranged on the fixing base, the plate spring structure can prop against one side of the sliding block away from the worm wheel, the plate spring structure can drive the sliding block to drive the worm to move towards the direction close to the worm wheel, when a gap appears between the meshing tooth surfaces of the worm wheel and the worm, the plate spring structure can push the sliding block to move towards the direction close to the worm wheel with the worm wheel, the gap between the meshing tooth surfaces of the worm wheel and the worm is reduced, the effect of eliminating transmission gap between the worm wheel and the worm is achieved, the force transmission performance is guaranteed, the abnormal noise caused by meshing collision of the worm wheel and the worm can be avoided, and the comfort of a driver is increased.

Preferably, the fixing seat is provided with a first mounting hole, the sliding block is provided with a second mounting hole, the axes of the first mounting hole and the second mounting hole are parallel to each other, and the first mounting hole and the second mounting hole are used for being inserted by one end of the worm.

Preferably, the fixing seat is provided with a first clamping groove structure, the sliding block is inserted into the first clamping groove structure, and the sliding block is used for moving relative to the fixing seat along a direction perpendicular to the axis of the first mounting hole.

Preferably, the fixing seat is further provided with a second clamping groove structure, the second clamping groove structure is located at the side of the first clamping groove structure, and the plate spring structure is clamped to the second clamping groove structure, so that the plate spring structure is propped against the sliding block.

Preferably, the second clamping groove structure comprises two clamping parts, the two clamping parts are arranged on the fixing seat at intervals, and two opposite ends of the plate spring structure are respectively clamped to the two clamping parts, so that the plate spring structure protrudes towards the direction close to the sliding block and is propped against the sliding block.

Preferably, the first clamping groove structure comprises a U-shaped structure main body, the U-shaped structure main body is arranged on the fixing seat, the opening end of the U-shaped structure main body faces the second clamping groove structure, the cavity structure surrounded by the U-shaped structure main body coincides with the first mounting hole along the axis direction of the first mounting hole, and the sliding block is inserted in the cavity structure.

Preferably, the first clamping groove structure further comprises a limiting portion, the limiting portion is arranged at the opening end of the U-shaped structure main body, a protruding block is arranged on the side wall of the sliding block, and the protruding block is located between the limiting portion and the fixing seat.

Preferably, the worm gear clearance adjustment device further comprises a bearing, the bearing is mounted in the first mounting hole, and the bearing is used for inserting one end of the worm.

Preferably, the worm gear clearance adjustment device further comprises a bushing, the bushing is installed in the bearing, and the bushing is used for being sleeved at one end of the worm.

The utility model also provides a speed reducer, which comprises a speed reducer shell, a worm wheel, a worm and the worm wheel and worm clearance adjusting device, wherein the worm wheel and the worm are arranged in the speed reducer shell, the worm wheel is meshed with the worm, and the worm wheel and worm clearance adjusting device is sleeved at one end of the worm.

The beneficial effects of the speed reducer and the worm gear clearance adjusting device are the same, and are not repeated here.

Drawings

Fig. 1 is a top view of a worm gear clearance adjustment device according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1;

fig. 3 is a schematic perspective view of a worm gear clearance adjustment device according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a speed reducer according to an embodiment of the present utility model.

Reference numerals illustrate:

1. a fixing seat; 11. a first mounting hole; 2. a slide block; 21. a second mounting hole; 22. a bump; 3. a leaf spring structure; 4. a worm; 5. a worm wheel; 6. a first clamping groove structure; 61. a U-shaped structural body; 62. a limit part; 7. a second clamping groove structure; 71. a clamping part; 8. a bearing; 9. a bushing.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

Referring to fig. 1 to 4, the gap adjusting device for worm gear according to the embodiments of the present utility model includes a fixing base 1, a slider 2 and a leaf spring structure 3, wherein the slider 2 is movably mounted on the fixing base 1, the slider 2 is used for being sleeved at one end of a worm 4, the leaf spring structure 3 is mounted on the fixing base 1, and the leaf spring structure 3 is used for abutting against one side of the slider 2 away from a worm wheel 5 meshed with the worm 4, so that the slider 2 drives the worm 4 to move towards a direction approaching to the worm wheel 5.

Specifically, the worm and gear clearance adjusting device can be installed in the speed reducer, and the worm 4 and the worm wheel 5 which are meshed with each other are further arranged in the speed reducer, and the worm and gear clearance adjusting device and the worm 4 are located on the same side of the worm wheel 5.

Worm gear clearance adjusting device can include fixing base 1, slider 2 and leaf spring structure 3, fixing base 1 can be fixed to be set up in the inside of reduction gear, and fixing base 1 and worm 4 are located worm wheel 5 with one side, slider 2 can movable mounting on fixing base 1's lateral wall, and slider 2 can overlap the one end of locating worm 4, leaf spring structure 3 can be installed on fixing base 1's lateral wall, leaf spring structure 3 and slider 2 are located fixing base 1's same lateral wall, and leaf spring structure 3 is located slider 2 and keeps away from worm wheel 5's one side, leaf spring structure 3 can receive extrusion deformation and support on slider 2's lateral wall, leaf spring structure 3 can provide the pretightning force for slider 2 this moment, leaf spring structure 3 can order about slider 2 to drive worm 4 and move towards the direction that is close to worm wheel 5.

When a gap appears between the meshing tooth surfaces of the worm wheel 5 and the worm 4, the plate spring structure 3 can push the sliding block 2 to move along the worm 4 towards the direction close to the worm wheel 5, so that the gap between the meshing tooth surfaces of the worm wheel 5 and the worm 4 is reduced, the effect of eliminating the transmission gap between the worm wheel 5 and the worm 4 is achieved, the force transmission performance is further ensured, abnormal noise caused by collision when the worm wheel 5 and the worm 4 are meshed can be avoided, and the comfort of a driver can be increased.

The leaf spring structure 3 has directivity, and can only provide elasticity to one direction generally, and the assembly of the leaf spring structure 3 is simple and easy according to the preset direction without trial and error when the leaf spring structure 3 is assembled, thereby effectively improving the assembly speed. And the leaf spring structure 3 is small and lightweight compared with elastic members such as torsion springs and coil springs, and can be produced at relatively low cost.

Referring to fig. 1 to 3, in some embodiments, the fixing base 1 is provided with a first mounting hole 11, the slider 2 is provided with a second mounting hole 21, axes of the first mounting hole 11 and the second mounting hole 21 are parallel to each other, and the first mounting hole 11 and the second mounting hole 21 are used for inserting one end of the worm 4.

Specifically, the shape of the fixing base 1 may be a disc-shaped structure, the fixing base 1 may be provided with a first mounting hole 11, the sliding block 2 may be located at an end face of the fixing base 1, and the sliding block 2 may be provided with a second mounting hole 21, and the axis of the first mounting hole 11 and the axis of the second mounting hole 21 may extend along the same direction, preferably, the axis of the first mounting hole 11 and the axis of the second mounting hole 21 are parallel to each other, so that one end of the worm 4 may be inserted into the first mounting hole 11 and the second mounting hole 21, and the worm gear gap adjusting device may be conveniently sleeved at one end of the worm 4.

Referring to fig. 1 to 3, in some embodiments, the fixing base 1 is provided with a first clamping groove structure 6, the sliding block 2 is inserted into the first clamping groove structure 6, and the sliding block 2 is used for moving along a direction perpendicular to the axis of the first mounting hole 11 relative to the fixing base 1.

Specifically, the side wall of the fixing base 1 may be provided with a first clamping groove structure 6, in this embodiment, the first clamping groove structure 6 may be disposed at an edge of the first mounting hole 11, the slider 2 may be inserted into the first clamping groove structure 6, and when the slider 2 is inserted into the first clamping groove structure 6, along an axis direction of the first mounting hole 11, a projection of the slider 2 coincides with the first mounting hole 11, and the slider 2 may move relative to the fixing base 1 along a direction perpendicular to an axis of the first mounting hole 11, more clearly, the slider 2 may move relative to the fixing base 1 toward a direction close to the worm wheel 5.

Referring to fig. 1 to 3, in some embodiments, a second clamping groove structure 7 is further provided on the fixing base 1, the second clamping groove structure 7 is located at a side of the first clamping groove structure 6, and the plate spring structure 3 is clamped to the second clamping groove structure 7, so that the plate spring structure 3 abuts against the slider 2.

Specifically, the side wall of the fixing seat 1 can be further provided with a second clamping groove structure 7, the second clamping groove structure 7 and the first clamping groove structure 6 are located on the same side wall of the fixing seat 1, the second clamping groove structure 7 is located on the side of the first clamping groove structure 6, the plate spring structure 3 can be clamped on the first clamping groove structure 6, the plate spring structure 3 can be pressed and deformed to abut against one side, away from the worm wheel 5, of the sliding block 2, and accordingly the plate spring structure 3 can drive the sliding block 2 to move towards the direction close to the worm wheel 5.

Referring to fig. 3, in some embodiments, the second clamping groove structure 7 includes two clamping portions 71, the two clamping portions 71 are disposed on the fixing base 1 at intervals, and opposite ends of the leaf spring structure 3 are respectively clamped to the two clamping portions 71, so that the leaf spring structure 3 protrudes toward a direction approaching to the slider 2 and abuts against the slider 2.

Specifically, the second clamping groove structure 7 may include two clamping portions 71, the two clamping portions 71 may be disposed on a side wall of the fixing base 1 at intervals, and the two clamping portions 71 are symmetrically disposed about a central line. In this embodiment, the clamping portion 71 includes a first plate and a second plate, one end of the first plate is connected to one end of the second plate, and the first plate and the second plate form an L-shaped structure with an included angle.

The leaf spring structure 3 sets up between two joint portions 71, the opposite ends of leaf spring structure 3 can be designed into straight platy structure, the mid portion of leaf spring structure 3 is protruding towards a direction, see to be the arch structure from the side of leaf spring structure 3, the opposite ends of leaf spring structure 3 can the joint respectively on two joint portions 71 that set up symmetrically, and the opposite ends of leaf spring structure 3 support with two joint portions 71 respectively, make the opposite ends of leaf spring structure 3 all receive the extrusion, force the mid portion of leaf spring structure 3 to be protruding towards the direction that is close to slider 2, make leaf spring structure 3 support on slider 2, and leaf spring structure 3 can extrude slider 2, can provide the pretightning force towards turbine 5 direction for slider 2 constantly steadily.

Referring to fig. 3, in some embodiments, the first clamping groove structure 6 includes a U-shaped structural body 61, the U-shaped structural body 61 is disposed on the fixing base 1, and an open end of the U-shaped structural body 61 faces the second clamping groove structure 7, along an axis direction of the first mounting hole 11, a cavity structure enclosed by the U-shaped structural body 61 coincides with the first mounting hole 11, and the slider 2 is inserted into the cavity structure.

Specifically, the first clamping groove structure 6 may include a U-shaped structural body 61, the U-shaped structural body 61 may be disposed on a side wall of the fixing base 1, the U-shaped structural body 61 may be disposed along an edge of the first mounting hole 11, and an open end of the U-shaped structural body 61 may face the second clamping groove structure 7, along an axis direction of the first mounting hole 11, a projection of the U-shaped structural body 61 may be located in the first mounting hole 11, that is, a cavity structure surrounded by the U-shaped structural body 61 may coincide with the first mounting hole 11, and the slider 2 may be inserted into the cavity structure from the open end of the U-shaped structural body 61. And when the sliding block 2 is inserted into the cavity structure, the projection of the second mounting hole 21 of the sliding block 2 along the axial direction of the first mounting hole 11 is positioned in the first mounting hole 11, so that the sliding block 2 is driven by the leaf spring structure 3 to move along the axial direction perpendicular to the first mounting hole 11 conveniently.

Referring to fig. 3, in some embodiments, the first card slot structure 6 further includes a limiting portion 62, the limiting portion 62 is disposed at an open end of the U-shaped structure body 61, a bump 22 is disposed on a side wall of the slider 2, and the bump 22 is located between the limiting portion 62 and the fixing base 1.

Specifically, the first clamping groove structure 6 may further include a limiting portion 62, the limiting portion 62 may be disposed at an open end of the U-shaped structural body 61, and an installation space is provided between the limiting portion 62 and a side wall of the fixing base 1. In this embodiment, the two limiting portions 62 are included, and the two limiting portions 62 are respectively disposed at two opposite ends of the U-shaped main body 61. The side wall of the sliding block 2 may be provided with a bump 22, and in this embodiment, two opposite side walls of the sliding block 2 are respectively provided with bumps 22.

When the slider 2 is inserted into the cavity structure of the U-shaped structural body 61, the two protrusions 22 may be respectively inserted into the two installation spaces, that is, the protrusions 22 may be clamped between the limiting portion 62 and the side wall of the fixing base 1, and the limiting portion 62 may prevent the slider 2 from being separated from the U-shaped structural body 61.

Referring to fig. 2, in some embodiments, the worm gear gap adjustment device further includes a bearing 8, where the bearing 8 is mounted in the first mounting hole 11, and the bearing 8 is used for inserting one end of the worm 4.

Specifically, the worm gear clearance adjustment device may further include a bearing 8, the bearing 8 may be installed in the first installation hole 11, and one end of the worm 4 may be inserted into a shaft hole of the bearing 8, and the worm 4 may be rotated conveniently by providing the bearing 8. When the bearing 8 is mounted in the first mounting hole 11, the bearing 8 can be riveted with the fixing seat 1, so that the bearing 8 is prevented from falling out of the first mounting hole 11.

Referring to fig. 2, in some embodiments, the worm gear clearance adjustment device further includes a bushing 9, where the bushing 9 is installed in the bearing 8, and the bushing 9 is used to be sleeved at one end of the worm 4.

Specifically, the worm gear clearance adjusting device can also include the bush 9, and the bush 9 can be installed in the shaft hole of bearing 8 to the one end of worm 4 can be located to the bush 9 cover, and the bush 9 is located between worm 4 and the bearing 8 promptly, and the bush 9 can adopt plastics material to make to have certain elasticity, when needing to adjust worm gear 5 worm 4 clearance, can make things convenient for worm 4 to remove in the shaft hole of bearing 8, thereby conveniently adjust worm gear 5 worm 4 clearance.

In this embodiment, a limiting block can be arranged on one end surface of the bushing 9 far away from the sliding block 2, and the limiting block can extend towards the direction of the bearing 8, so that the limiting block is clamped with the bearing 8, and the bushing 9 can be prevented from being separated from the bearing 8.

Referring to fig. 4, a speed reducer according to another embodiment of the present utility model includes a speed reducer housing, a worm wheel 5, a worm 4, and a worm gear gap adjustment device as described above, where the worm wheel 5 and the worm 4 are both disposed in the speed reducer housing, the worm wheel 5 is meshed with the worm 4, and the worm gear gap adjustment device is sleeved at one end of the worm 4.

Specifically, the reduction gear includes reduction gear casing, worm wheel 5, worm 4 and worm gear clearance adjustment device, the inside of reduction gear casing is equipped with three installation cavity, worm wheel 5 can rotate to install in first installation cavity, the one end of worm 4 can rotate to install in the second installation cavity, worm gear clearance adjustment device can install in the third installation cavity, and the other end of worm 4 can be inserted and locate in worm gear clearance adjustment device, worm gear clearance adjustment device is used for providing the pretightning force towards worm wheel 5 for worm 4, make worm 4 press worm wheel 5 always, eliminate the transmission clearance between worm wheel 5 and the worm 4, avoid worm wheel 5 and worm 4 to take place the striking and produce abnormal sound.

Although the present disclosure is disclosed above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the disclosure.

Claims (10)

1. The utility model provides a worm gear clearance adjustment device, its characterized in that, includes fixing base (1), slider (2) and leaf spring structure (3), slider (2) movable mounting in on fixing base (1), slider (2) are used for the cover to locate the one end of worm (4), leaf spring structure (3) install in on fixing base (1), just leaf spring structure (3) be used for support hold in slider (2) keep away from with one side of worm wheel (5) of worm (4) meshing, so that slider (2) drive worm (4) are close to the direction of worm wheel (5) removes.

2. The worm and gear clearance adjustment device according to claim 1, characterized in that the fixing seat (1) is provided with a first mounting hole (11), the sliding block (2) is provided with a second mounting hole (21), the axes of the first mounting hole (11) and the second mounting hole (21) are parallel to each other, and the first mounting hole (11) and the second mounting hole (21) are both used for inserting one end of the worm (4).

3. The worm and gear clearance adjustment device according to claim 2, characterized in that the fixing base (1) is provided with a first clamping groove structure (6), the sliding block (2) is inserted into the first clamping groove structure (6), and the sliding block (2) is used for moving along a direction perpendicular to the axis of the first mounting hole (11) relative to the fixing base (1).

4. A worm and gear clearance adjusting device according to claim 3, wherein the fixing base (1) is further provided with a second clamping groove structure (7), the second clamping groove structure (7) is located at a side of the first clamping groove structure (6), and the plate spring structure (3) is clamped to the second clamping groove structure (7), so that the plate spring structure (3) is abutted to the sliding block (2).

5. The worm and gear clearance adjustment device according to claim 4, wherein the second clamping groove structure (7) comprises two clamping portions (71), the two clamping portions (71) are arranged on the fixing base (1) at intervals, opposite ends of the plate spring structure (3) are respectively clamped to the two clamping portions (71), so that the plate spring structure (3) protrudes towards a direction approaching the sliding block (2) and is abutted to the sliding block (2).

6. The worm and gear clearance adjustment device according to claim 4, wherein the first clamping groove structure (6) comprises a U-shaped structural body (61), the U-shaped structural body (61) is arranged on the fixing seat (1), the opening end of the U-shaped structural body (61) faces the second clamping groove structure (7), along the axis direction of the first mounting hole (11), a cavity structure surrounded by the U-shaped structural body (61) coincides with the first mounting hole (11), and the sliding block (2) is inserted into the cavity structure.

7. The worm and gear clearance adjustment device according to claim 6, characterized in that the first clamping groove structure (6) further comprises a limiting portion (62), the limiting portion (62) is disposed at an opening end of the U-shaped structural body (61), a bump (22) is disposed on a side wall of the slider (2), and the bump (22) is located between the limiting portion (62) and the fixing base (1).

8. The worm gear clearance adjustment device according to claim 2, further comprising a bearing (8), the bearing (8) being mounted to the first mounting hole (11), the bearing (8) being for insertion of one end of the worm (4).

9. The worm and gear clearance adjustment device according to claim 8, further comprising a bushing (9), the bushing (9) being mounted in the bearing (8), the bushing (9) being adapted to be sleeved at one end of the worm (4).

10. A reducer, characterized by comprising a reducer housing, a worm wheel (5), a worm (4) and a worm and worm gear clearance adjustment device according to any one of claims 1-9, wherein the worm wheel (5) and the worm (4) are both arranged in the reducer housing, the worm wheel (5) is meshed with the worm (4), and the worm and worm gear clearance adjustment device is sleeved at one end of the worm (4).