Thin-wall type shaft sleeve inner gear ring gear shaping clamp

Abstract

The utility model relates to a gear shaping clamp for an inner gear ring of a thin-wall type shaft sleeve. The gear shaping clamp comprises a base, a shell, a pull rod and a drawing sleeve synchronously moving along with the pull rod. An end cover is installed on the upper surface of the shell, an elastic expansion sleeve is arranged in the center of the upper end face of the end cover, a shaft sleeve to be subjected to gear shaping is located and installed on the elastic expansion sleeve, a telescopic rod is arranged in the elastic expansion sleeve, a compression spring is arranged at the lower end of the telescopic rod, the pull rod pushes the telescopic rod to loosen the elastic expansion sleeve when moving upwards, and the compression spring pushes the telescopic rod to move downwards to tighten the elastic expansion sleeve when the pull rod moves downwards. Pressing plates are rotationally arranged on the end covers on the two sides of the shaft sleeve respectively, the pressing plates are separated from the step face of the shaft sleeve when the elastic expansion sleeve is loosened, and the pressing plates are pressed on the step face of the shaft sleeve when the elastic expansion sleeve is expanded. The shaft sleeve is tensioned from the inner shaft sleeve through the elastic tensioning sleeve, the wall of the shaft sleeve is compressed from the outer side through the pressing plate, the shaft sleeve is clamped through internal and external cooperation, compared with a single tensioning or compressing clamping mode, deformation of the inner diameter and the outer diameter of the shaft sleeve caused by overlarge clamping force in gear shaping is better prevented, and the gear shaping quality of the shaft sleeve is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of gear processing technology, and in particular to a thin-walled bushing internal gear ring gear fitting fixture. Background Technology

[0002] In some relatively compact transmission mechanisms, the gear ring meshing method is often used to transmit power. For example, the bushing structure used at the output end of the motor has an internal gear ring machined inside the bushing, which meshes with the gear on the transmission shaft to transmit power.

[0003] However, depending on the operating conditions, some bushings need to be weight-reduced, resulting in a thinner bushing wall. This creates a thin-walled structure at the gear ring. Since the gear ring is usually machined using a hard gear shaping process, the fixture is subjected to a large force. Under the action of a large clamping force, conventional gear shaping fixtures can easily cause deformation of the inner and outer diameters of the bushing, resulting in the scrapping of the workpiece. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to overcome the shortcomings of the prior art, this utility model provides a thin-walled bushing internal gear ring gear hobbing fixture that can effectively prevent deformation of the inner and outer diameters of the bushing during gear hobbing.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a thin-walled bushing internal gear ring gear inserter includes a base, a housing on the base, a pull rod that can move up and down through the housing from the bottom of the base, and a pull sleeve that moves synchronously with the pull rod inside the housing; an end cap is installed on the upper surface of the housing, and an elastic expansion sleeve is provided at the center of the upper end face of the end cap; the bushing to be inserted is positioned and installed on the elastic expansion sleeve, and a telescopic rod is provided inside the elastic expansion sleeve; a compression spring is provided at the lower end of the telescopic rod; when the pull rod moves upward, it pushes the telescopic rod to loosen the elastic expansion sleeve; when the pull rod moves downward, the compression spring pushes the telescopic rod downward to tighten the elastic expansion sleeve; the lower part of the outer periphery of the bushing has a stepped surface, and pressure plates are rotatably provided on the end caps located on both sides of the bushing; when the elastic expansion sleeve is loosened, the pressure plates disengage from the stepped surface of the bushing; when the elastic expansion sleeve is tightened, the pressure plates press against the stepped surface of the bushing.

[0006] The elastic expansion sleeve includes an expansion sleeve seat with a stepped hole, a flange seat fixed on the expansion sleeve seat, an expansion sleeve body disposed in the flange seat with a gap, an outer wall of the expansion sleeve seat having a tapered surface, an inner wall of the expansion sleeve body having a tapered hole matching the tapered surface, a telescopic rod passing through the stepped hole of the expansion sleeve seat and the upper end of the telescopic rod being fixed to the upper end of the expansion sleeve body through a connecting plate, a limit sleeve fixed to the lower end of the telescopic rod, and a compression spring sleeved on the telescopic rod between the stepped surface of the stepped hole of the expansion sleeve seat and the limit sleeve.

[0007] The two ends of the pull sleeve are respectively connected to floating rods, and a connecting block is fixed on the end cap corresponding to the position of the pressure plate. The outer end of the pressure plate is movably connected to the connecting block. The upper end of the floating rod extends out of the connecting block and is hinged to an ear plate. The upper end of the ear plate is movably connected to the middle of the pressure plate.

[0008] The pull rod has a hemispherical protrusion, and the pull sleeve has a hemispherical cavity that matches the hemispherical protrusion. A cover plate is fixed on the pull sleeve to cover the hemispherical cavity.

[0009] There is a gap between the inner bottom surface of the cover plate and the upper end surface of the hemispherical protrusion.

[0010] The beneficial effects of this utility model are as follows: This utility model uses an elastic expansion sleeve to tighten the inner wall of the bushing, and a pressure plate to press the outer wall of the bushing. The inner and outer parts work together to clamp the bushing. Compared with the conventional clamping method that uses only expansion or pressing, this method can better improve the clamping effect of thin-walled bushings, effectively prevent the deformation of the inner and outer diameters of the bushing caused by the large clamping force during the tooth-setting process, and ensure the quality of the bushing tooth-setting. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the internal structure of the present invention after the end cap of the housing has been removed.

[0014] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0015] Figure 4 This is a cross-sectional structural schematic diagram of the elastic expansion sleeve described in this utility model.

[0016] In the diagram: 1. Base, 2. Housing, 3. Pull rod, 3-1. Hemispherical protrusion, 4. Pull sleeve, 4-1. Hemispherical cavity, 5. End cap, 6. Elastic expansion sleeve, 6-1. Expansion sleeve seat, 6-2. Flange seat, 6-3. Expansion sleeve body, 6-4. Connecting plate, 7. Bushing, 8. Telescopic rod, 9. Compression spring, 10. Pressure plate, 11. Limiting sleeve, 12. Floating rod, 13. Connecting block, 14. Ear plate, 15. Cover plate. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0018] like Figures 1-4The thin-walled bushing internal gear ring gear shaping fixture shown includes a base 1, a housing 2, a pull rod 3, a pull sleeve 4, and an end cap 5. The housing 2 is fixed on the base 1, and the end cap 5 is fixed on the upper end face of the housing. The pull rod 3 passes through the housing 2 from below the base 1. The upper end of the pull rod 3 is located in the inner hole of the end cap 5 and is spaced a certain distance from the upper end face of the end cap 5. The pull sleeve 4 is located inside the housing 2. The pull rod 3 and the pull sleeve 4 are fitted with an arc surface structure. When the pull rod 3 is pushed up and down by the hydraulic cylinder on the gear shaping machine, the pull sleeve 4 moves synchronously with the pull rod 3.

[0019] An elastic expansion sleeve 6 is installed at the center of the upper end face of the end cap 5. A telescopic rod 8 is provided inside the elastic expansion sleeve 6. The elastic expansion sleeve 6 includes an expansion sleeve seat 6-1 with a stepped hole. A flange seat 6-2 is fixed on the expansion sleeve seat 6-1. An expansion sleeve body 6-3 is provided in the flange seat 6-2 with a gap. The outer wall of the expansion sleeve seat 6-1 has a tapered surface. The inner wall of the expansion sleeve body 6-3 has a tapered hole that matches the tapered surface. The telescopic rod 8 passes through the stepped hole of the expansion sleeve seat 6-1. The upper end of the telescopic rod 8 is fixed to the upper end of the expansion sleeve body 6-3 through a connecting plate 6-4. A limit sleeve 11 is fixed to the lower end of the telescopic rod 8. A compression spring 9 is sleeved on the telescopic rod 8 located between the stepped surface of the stepped hole of the expansion sleeve seat 6-1 and the limit sleeve 11. When the pull rod 3 moves upward, it is compressed.

[0020] The bushing 7 to be fitted with teeth includes a thin-walled sleeve and a connecting sleeve with an integral structure. There is a stepped surface between the outer peripheral surface of the thin-walled sleeve and the outer peripheral surface of the connecting sleeve. Connecting blocks 13 are fixed on the end caps on both sides of the bushing. The two ends of the pull sleeve 4 are respectively connected to floating rods 12 that move synchronously with the pull sleeve 4. The upper end of the floating rod 12 extends out of the connecting block 13 and is hinged to the ear plate 14 by a pin. The outer end of the connecting block 13 is movably connected to the pressure plate 10 by a pin. The upper end of the ear plate 14 is movably connected to the middle part of the pressure plate 10 by a pin.

[0021] The pull rod 3, which mates with the pull sleeve 4, has a hemispherical protrusion 3-1 with its spherical surface facing downwards. Correspondingly, the pull sleeve 4 has a hemispherical cavity 4-1 with its spherical surface facing upwards. The hemispherical protrusion 3-1 is fitted inside the hemispherical cavity 4-1. A cover plate 15 is fixed on the pull sleeve 4 and covers the hemispherical cavity 4-1. In particular, there is a certain gap between the inner bottom surface of the cover plate 15 and the upper end surface of the hemispherical protrusion 3-1.

[0022] The spherical fit between the pull rod 3 and the pull sleeve 4 ensures that the floating rod 12 has a certain amount of swing, so that the pressure plate 10 can better press the bushing 7 workpiece. The gap between the cover plate 15 and the upper end face of the hemispherical protrusion 3-1 is to facilitate the control of the swing distance of the floating rod 12 and the clamping force of the pressure plate 10.

[0023] When the gear shaping fixture is installed on the worktable of the gear shaping machine, and the bushing 7 is clamped, the piston rod of the hydraulic cylinder on the gear shaping machine rises, pushing the pull rod 3 upward. When the pull rod 3 moves upward, it pushes the telescopic rod 8, causing the expansion sleeve 6-3 to rise and disengage from the expansion sleeve seat 6-1. The elastic expansion sleeve 6 is in a loosened state. At the same time, the upward movement of the pull rod 3 pushes the floating rod 12 upward. The floating rod 12 pushes the pressure plate 10 upward through the ear plate 14. At this time, the connecting sleeve of the bushing 7 is fitted onto the flange of the elastic expansion sleeve 6. The hydraulic cylinder piston rod descends, causing the pull rod 3 to descend. The pull rod 3 disengages from the telescopic rod 8. The spring 9 returns to its original position, pushing the telescopic rod 8 downward. The telescopic rod 8 causes the expansion sleeve 6-3 to descend and engage with the expansion sleeve seat 6-1 on a conical surface. The expansion sleeve 6-3 opens outward, tightening the bushing 7. At the same time, the floating rod 12, which descends synchronously with the pull rod 3, pulls the pressure plate 10 downward, causing the inner end of the pressure plate 10 to press against the step surface of the bushing 7, thus completing the clamping of the bushing 7.

[0024] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A thin-walled bushing internal gear ring gear shaping fixture, comprising a base (1), characterized in that: The base (1) is provided with a housing (2), and a pull rod (3) that can move up and down is provided through the housing (2) from the bottom of the base (1). The housing (2) is provided with a pull sleeve (4) that moves synchronously with the pull rod (3). An end cap (5) is installed on the upper surface of the housing (2). An elastic expansion sleeve (6) is provided at the center of the upper end face of the end cap (5). The bushing (7) to be inserted is positioned and installed on the elastic expansion sleeve (6). A telescopic rod (8) is provided inside the elastic expansion sleeve (6). A compression spring (9) is provided at the lower end of the telescopic rod (8). When the pull rod (3) moves upward, it pushes the telescopic rod (8) to loosen the elastic expansion sleeve (6). When the pull rod (3) moves downward, the compression spring (9) pushes the telescopic rod (8) downward to tighten the elastic expansion sleeve (6). The lower part of the outer periphery of the bushing (7) has a stepped surface. The end caps (5) on both sides of the bushing (7) are respectively provided with pressure plates (10). When the elastic expansion sleeve (6) is loosened, the pressure plate (10) is disengaged from the stepped surface of the bushing (7). When the elastic expansion sleeve (6) is tightened, the pressure plate (10) is pressed against the stepped surface of the bushing (7).

2. The thin-walled bushing internal gear ring gear shaping fixture as described in claim 1, characterized in that: The elastic expansion sleeve (6) includes an expansion sleeve seat (6-1) with a stepped hole, a flange seat (6-2) fixed on the expansion sleeve seat (6-1), an expansion sleeve body (6-3) with a gap in the flange seat (6-2), an outer wall of the expansion sleeve seat (6-1) with a tapered surface, an inner wall of the expansion sleeve body (6-3) with a tapered hole matching the tapered surface, a telescopic rod (8) passing through the stepped hole of the expansion sleeve seat (6-1) and the upper end of the telescopic rod (8) being fixed to the upper end of the expansion sleeve body (6-3) through a connecting plate (6-4), a limit sleeve (11) fixed at the lower end of the telescopic rod (8), and a compression spring (9) sleeved on the telescopic rod (8) between the stepped surface of the stepped hole of the expansion sleeve seat (6-1) and the limit sleeve (11).

3. The thin-walled bushing internal gear ring gear shaping fixture as described in claim 1, characterized in that: The two ends of the pull sleeve (4) are respectively connected to floating rods (12), and the end cap (5) corresponding to the position of the pressure plate (10) is fixed with a connecting block (13). The outer end of the pressure plate (10) is movably connected to the connecting block (13). The upper end of the floating rod (12) extends out of the connecting block (13) and is hinged with an ear plate (14). The upper end of the ear plate (14) is movably connected to the middle part of the pressure plate (10).

4. The thin-walled bushing internal gear ring gear shaping fixture as described in claim 1, characterized in that: The pull rod (3) has a hemispherical protrusion (3-1), and the pull sleeve (4) has a hemispherical cavity (4-1) that matches the hemispherical protrusion (3-1). A cover plate (15) is fixed on the pull sleeve (4) and covers the hemispherical cavity (4-1).

5. The thin-walled bushing internal gear ring gear shaping fixture as described in claim 4, characterized in that: There is a gap between the inner bottom surface of the cover plate (15) and the upper end surface of the hemispherical protrusion (3-1).

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