Bushing structure for gearbox gear

Abstract

The utility model relates to the technical field of gearboxes, in particular to a bushing structure for a gearbox gear, which comprises a bushing (1). The lining (1) is connected to the gear, and a limiting structure is arranged between the lining (1) and the gear. A gear shaft is connected in the bushing (1); the bushing is in interference fit with a gear inner hole of the gear; the limiting structure is arranged on the lining and arranged between the gear inner hole and the lining, and the connecting stability of the lining and the gear inner hole can be further enhanced. And the problem of axial loosening of the bushing and the gear is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox technical field, specifically, the utility model relates to a kind of bush structure for gearbox gear. BACKGROUND

[0002] Gearbox is equipped with gear, bearing or bush is usually connected in the inner hole of gear, gear shaft is installed in the bearing or bush, to rotate in the inner hole of gear;When the existing bush is actually used in 8AT gearbox, bush and gear inner hole loosening, falling problem is prone to occur, it is difficult to solve, so that gear shaft cannot rotate flexibly in the inner hole of gear.

[0003] Applicant finds that the Chinese patent document with publication number 101858418A discloses a rack bush and vehicle rack pinion type steering device with rack bush on October 13, 2010, which can smoothly support a rack bar in an axial direction and a vertical direction, thereby reducing abnormal wear of the rack bush, reducing the creaking noise caused by external force transmitted through the rack bar during movement of the rack bar, and avoiding damage to the rack bar and a pinion caused by transmitting the load generated by external impact on the shaft rod;The device cannot solve the above technical problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to optimize the existing bush structure. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of bush structure for gearbox gear, which can be stably connected in the inner hole of gear.

[0006] In order to solve the above technical problems, the technical scheme adopted by the utility model is as follows: a kind of bush structure for gearbox gear, including bush;The bush is connected to the gear, and a limiting structure is provided between the bush and the gear;Gear shaft is connected in the bush.

[0007] The limiting structure includes a lug;The bush is provided with a mounting hole;The lug is provided on the side of the bush away from the mounting hole.

[0008] The gear includes a gear inner hole;The gear inner hole is provided with a clamping groove;The bush is sleeved in the gear inner hole;The lug is clamped in the clamping groove.

[0009] The side of the bush close to the mounting hole is provided with an oil groove.

[0010] The oil groove corresponds to the position of the lug;Multiple lugs and oil grooves are evenly distributed on the bush.

[0011] The cross section of the convex block and the oil groove is a involute spline tooth shape; the convex block is in interference fit with the clamping groove; the outer diameter surface of the bushing is in interference fit with the gear inner hole.

[0012] The bushing is provided with a limiting surface on the side close to the mounting hole; the limiting surface is arranged between adjacent oil grooves.

[0013] The gear shaft sleeve is connected in the bushing and is in clearance fit with the limiting surface.

[0014] The limiting surface is provided with a sintered copper powder layer.

[0015] The oil groove is provided with lubricating oil; and the two ends of the bushing are provided with chamfers.

[0016] The beneficial effects of the present application are:

[0017] 1. A plurality of convex blocks are arranged on the outer surface of the bushing at equal intervals; when the bushing is installed in the gear inner hole, the bushing is in interference fit with the gear inner hole; at this time, the convex blocks are in abutment with the inner wall of the gear inner hole, realizing the fixed connection of the bushing and the gear, and solving the problem of axial looseness of the bushing and the gear.

[0018] 2. The convex block and the oil groove of the present application are stamped on the bushing; a plurality of oil grooves are arranged on the inner side of the bushing at equal intervals, and compared with the oil storage holes of the traditional bushing, the oil storage capacity of the oil groove of the present device is larger, and the lubrication of the bushing and the shaft during the rotation of the gear shaft can be fully realized.

[0019] 3. The limiting plate of the present application is arranged between two adjacent oil grooves, and compared with the traditional bushing, the area of the limiting plate of the present device is smaller, so that the area of the sintered copper powder layer to be sprayed is smaller, reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] The specific implementation manner of the present application will be further described in detail below in combination with the drawings, in which:

[0021] Figure 1 It is a structural schematic view of the bushing structure for the gearbox gear.

[0022] Figure 2 It is an installation state schematic view of the bushing of the bushing structure for the gearbox gear.

[0023] The marks in the above drawings are:

[0024] The marks in the drawings are:

[0025] 1. bushing, 101, mounting hole,

[0026] 2. convex block,

[0027] 3. oil groove,

[0028] 4, limit surface,

[0029] 5, chamfer,

[0030] 6, gear, 601, gear shaft, 602, gear hole, 603, clamping groove. DETAILED DESCRIPTION

[0031] The specific embodiments of the present application are described below in detail with reference to the accompanying drawings, and the purpose is to help the technical personnel in the field to have a more complete, accurate and in-depth understanding of the inventive concept and technical scheme of the present application, and to help them to implement it.

[0032] Figure 1 The gearbox gear bushing structure shown, comprising a bushing 1; the bushing 1 is connected to the gear 6, and a limiting structure is provided between the bushing 1 and the gear 6; the bushing 1 is connected with a gear shaft 601.

[0033] The bushing 1 and the gear hole 602 of the gear 6 are in interference fit; the limiting structure is provided on the bushing 1 and between the gear hole 602 and the bushing 1, which can further enhance the connection stability of the bushing 1 and the gear hole 602; effectively solve the problem of axial looseness of the bushing 1 and the gear 6.

[0034] The limiting structure includes a protrusion 2; the bushing 1 is provided with a mounting hole 101; the protrusion 2 is provided on the side of the bushing 1 away from the mounting hole 101.

[0035] The protrusions 2 are evenly distributed on the outer side surface of the bushing 1, and when the bushing 1 is installed in the gear hole 602, the protrusions 2 abut against the inner wall of the gear hole 602; thereby clamping the bushing 1 in the gear hole 602; the bushing 1 is a circular tube structure; the mounting hole 101 is provided on the inner side of the bushing 1.

[0036] The gear 6 includes a gear hole 602; the gear hole 602 is provided with a clamping groove 603; the bushing 1 is sleeved in the gear hole 602; the protrusion 2 is clamped in the clamping groove 603.

[0037] The gear hole 602 is a circular hole provided on the gear 6; the clamping groove 603 is a involute tooth-shaped groove corresponding to the shape of the protrusion 2; a plurality of clamping grooves 603 are evenly provided in the gear hole 602, and the position and number of the clamping grooves 603 correspond to the protrusion 2.

[0038] The side of the bushing 1 close to the mounting hole 101 is provided with an oil groove 3.

[0039] The convex block 2 and the oil groove 3 are punched on the bushing 1; the inner side of the bushing 1 is provided with a plurality of oil grooves 3 at equal intervals, compared with the oil storage hole of the traditional bushing, the oil storage capacity of the oil groove 3 of the device is more, which can fully realize the lubrication of the gear shaft 601 during rotation, and can avoid adding lubricating oil for multiple times.

[0040] The oil groove 3 corresponds to the position of the convex block 2; a plurality of convex blocks 2 and oil grooves 3 are uniformly distributed on the bushing 1.

[0041] The oil groove 3 and the convex block 2 are integrally punched on the outer side of the bushing 1; a plurality of convex blocks 2 are uniformly distributed on the outer wall of the bushing 1 at equal intervals; a plurality of oil grooves 3 are uniformly distributed on the inner wall of the bushing 1 at equal intervals.

[0042] The cross section of the convex block 2 and the oil groove 3 is a involute spline tooth shape; the convex block 2 is in interference fit with the clamping groove 603; the outer diameter surface of the bushing 1 is in interference fit with the gear inner hole 602.

[0043] The convex block 2 is a hollow involute spline tooth plate; the convex block 2 is in interference fit with the clamping groove 603; at the same time, the outer diameter surface of the bushing 1 is in interference fit with the inner diameter surface of the gear inner hole 602; which ensures the firmness of the connection between the two.

[0044] The bushing 1 is provided with a limiting surface 4 on the side close to the mounting hole 101; the limiting surface 4 is arranged between adjacent oil grooves 3.

[0045] The limiting surface 4 is an arc surface; the limiting surface 4 is arranged between every two oil grooves 3; the limiting surface can limit the gear shaft 601 to avoid radial movement.

[0046] The gear shaft 601 is sleeved in the bushing 1, and is in clearance fit with the limiting surface 4.

[0047] The gear shaft 601 and the limiting surface 4 are in clearance fit, so that the gear shaft 601 can rotate flexibly in the bushing 1, so that the gear shaft 601 can normally function.

[0048] The limiting surface 4 is provided with a sintered copper powder layer.

[0049] The sintered copper powder layer is formed by spraying copper powder on the limiting surface 4 and then sintering; the sintered copper powder layer has good heat conductivity, wear resistance and self-lubricity, which reduces the friction and wear of the limiting surface 4 and the gear shaft 601; effectively improves the service life of the bushing 1 and the gear shaft 601.

[0050] The oil groove 3 is provided with lubricating oil; the both ends of the bushing 1 are provided with chamfers 5.

[0051] The oil groove 3 can store lubricating oil in the gearbox; the lubricating oil can realize sufficient lubrication of the gear shaft 601; the chamfer 5 can reduce the resistance during assembly when the bushing 1 is installed; and can guide during installation, facilitating installation operation.

[0052] The specific working process of the utility model is as follows:

[0053] A plurality of convex blocks 2 and oil grooves 3 are formed on the bushing 1 by punching and stretching; copper powder is sprayed on the limiting surface 4 and sintered; chamfers 5 are turned on both ends of the bushing 1; the bushing 1 is connected in the gear inner hole 602; the gear shaft 601 is installed in the bushing 1.

[0054] The utility model is described exemplarily above in combination with the drawings. Apparently, the utility model is not limited by the above-mentioned mode in the specific implementation. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model; or the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A bushing structure for gearbox gears, characterized in that: Includes a bushing (1); the bushing (1) is connected to the gear (6) and a limiting structure is provided between the bushing (1) and the gear (6); a gear shaft (601) is connected in the bushing (1); The limiting structure includes a protrusion (2); the bushing (1) is provided with a mounting hole (101); the protrusion (2) is located on the side of the bushing (1) away from the mounting hole (101); The gear (6) includes a gear inner hole (602); a groove (603) is provided in the gear inner hole (602); the bushing (1) is sleeved in the gear inner hole (602); the protrusion (2) is engaged in the groove (603); The bushing (1) has an oil groove (3) on the side near the mounting hole (101).

2. The bushing structure for a gearbox gear according to claim 1, characterized in that: The oil groove (3) corresponds to the position of the protrusion (2); a plurality of the protrusions (2) and the oil groove (3) are evenly distributed on the bushing (1).

3. A bushing structure for a gearbox gear according to claim 2, characterized in that: The cross-sections of the protrusion (2) and the oil groove (3) are both involute spline teeth; the protrusion (2) is interference-fitted with the slot (603); the outer diameter surface of the bushing (1) is interference-fitted with the inner hole (602) of the gear.

4. A bushing structure for a gearbox gear according to claim 3, characterized in that: The bushing (1) has a limiting surface (4) on the side near the mounting hole (101); the limiting surface (4) is located between adjacent oil grooves (3).

5. A bushing structure for a gearbox gear according to claim 4, characterized in that: The gear shaft (601) is sleeved in the bushing (1) and has clearance fit with the limiting surface (4).

6. A bushing structure for a gearbox gear according to any one of claims 4-5, characterized in that: A sintered copper powder layer is provided on the limiting surface (4).

7. A bushing structure for a gearbox gear according to claim 6, characterized in that: The oil groove (3) contains lubricating oil; both ends of the bushing (1) are chamfered (5).

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