Positioning tool for processing inner gear ring

Abstract

The utility model relates to gear processing technical field, and disclose a kind of inner gear ring machining positioning tool, this inner gear ring machining positioning tool, including mounting plate, the lower surface of mounting plate is fixedly installed with electric push rod, the upper surface of mounting plate is fixedly installed with fixed seat, the inside of fixed seat is provided with fixed mechanism.This inner gear ring machining positioning tool, inner gear ring is placed at the opening of fixed seat, with the downward movement of electric push rod drives expansion sleeve to move, sliding block follows movement, reset spring deformation, and then the arc of fixed seat mouth, expansion sleeve inner straight wall starts to contract to the axis, so that expansion sleeve inner straight wall and the clearance of inner gear ring outer cylindrical surface become smaller and smaller, to carry out fixed guarantee the arc surface of inner gear ring is stably fixed, electric push rod resets when not processing, reset spring reset promotes the reset of expansion sleeve, it is convenient for next time to fix inner gear ring multiple times, guarantee the accuracy after inner gear ring processing.

Description

Technical Field

[0001] This utility model relates to the field of gear processing technology, specifically to a positioning fixture for internal gear ring processing. Background Technology

[0002] Currently, when machining the internal teeth of gear rings, the outer circle and end face of the gear ring are generally used as positioning references, and several pressure plates are used to press the other end face. This is typically done for loose parts or small batches.

[0003] According to a public notice (No. CN221312780U) of a positioning fixture for machining internal gear rings, the above application positions and clamps the parts, enabling rapid clamping and removal of the parts. The entire process is characterized by stable positioning, reliable clamping force, and high efficiency in loading and unloading parts, thereby ensuring the quality of the internal gears after machining.

[0004] However, in actual use, the above-mentioned equipment usually requires manual clamping of the other end face after aligning the outer circle before processing. During manual clamping, the pressure plate cannot apply force simultaneously and the magnitude of the applied force is difficult to keep constant. Therefore, the workpiece after alignment often experiences a slight offset on the positioning surface due to clamping, resulting in the machined internal teeth deviating more or less from the center of the outer circle. In view of this, we propose a positioning fixture for machining internal gear rings. Utility Model Content

[0005] The purpose of this invention is to provide a positioning fixture for machining internal gear rings to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a positioning fixture for machining internal gear rings, comprising a mounting plate, an electric push rod fixedly mounted on the lower surface of the mounting plate, a fixing seat fixedly mounted on the upper surface of the mounting plate, a fixing mechanism disposed inside the fixing seat, and a promoting mechanism disposed inside the fixing seat, the fixing mechanism comprising:

[0007] A reinforcing ring is fixedly installed on the arc surface of the fixed base. A connecting block is fixedly installed on the movable end of the electric push rod. A movable plate is fixedly installed on the surface of the connecting block. An expansion sleeve is fixedly installed on the upper surface of the movable plate.

[0008] The movable groove is formed on the inner wall of the fixed base. A straight rod is fixedly installed on the inner wall of the movable groove. A return spring is fixedly installed on the inner wall of the movable groove. A sliding block is fixedly connected to the end of the return spring away from the movable groove.

[0009] Preferably, the promoting mechanism includes a rubber strip, which is fixedly installed on the arc surface of the expansion sleeve.

[0010] Preferably, the rubber strip is in the shape of an outward V-shape, which allows the rubber strip to spread out better and fit the arc surface of the inner gear ring.

[0011] Preferably, the number of expansion sleeves is set to several, and the several expansion sleeves are evenly fixedly installed on the upper surface of the moving plate in a circumferential array. The arrangement of multiple expansion sleeves facilitates the fixing of the internal gear ring.

[0012] Preferably, the arc surface of the expansion sleeve is fixedly installed on the side of the sliding block away from the fixed base, so that the movement of the sliding block can drive the expansion sleeve to move.

[0013] Preferably, the sliding block is sleeved on the arc surface of the straight rod, so that the sliding block can slide on the arc surface of the straight rod, thereby driving the expansion sleeve to reset.

[0014] Preferably, the movable end of the electric push rod penetrates the surface of the mounting plate, and the lower end of the movable end fixing seat of the electric push rod enables the movable end of the electric push rod to drive the moving plate to move.

[0015] Compared with the prior art, this utility model provides a positioning fixture for machining internal gear rings, which has the following beneficial effects:

[0016] 1. This internal gear ring machining positioning fixture, through the setting of a fixing mechanism, places the internal gear ring at the opening of the fixing seat. As the electric push rod moves downward, it drives the expansion sleeve to move, the sliding block follows, and the return spring deforms. Consequently, the arc shape near the opening of the fixing seat and the inner straight wall of the expansion sleeve begin to contract towards the axis, making the gap between the inner straight wall of the expansion sleeve and the outer cylindrical surface of the internal gear ring smaller and smaller. This ensures the stable fixing of the arc surface of the internal gear ring. When not machining, the electric push rod resets, and the return spring resets, promoting the reset of the expansion sleeve. This facilitates multiple fixings of the internal gear ring in the next cycle, ensuring the accuracy of the internal gear ring after machining.

[0017] 2. The internal gear ring machining positioning fixture is equipped with a facilitating mechanism, which allows the figure-eight shaped rubber strip to better unfold and fit against the arc surface of the internal gear ring. In conjunction with the clamping of the expansion sleeve, it has a good clamping effect on the axial direction of the internal gear ring, ensuring the accuracy of the internal gear ring after machining. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 This is a partial cross-sectional schematic diagram of the structural fixing base of this utility model;

[0020] Figure 3 This is a schematic diagram of a partial explosion of the expansion sleeve structure of this utility model;

[0021] Figure 4This is a partial schematic diagram of the expansion and contraction sleeve structure of this utility model.

[0022] In the diagram: 1. Mounting plate; 2. Electric push rod; 3. Fixing mechanism; 301. Reinforcing ring; 302. Moving plate; 303. Connecting block; 304. Expansion sleeve; 305. Movable groove; 306. Straight rod; 307. Return spring; 308. Sliding block; 4. Promoting mechanism; 401. Rubber strip; 5. Fixing seat. Detailed Implementation

[0023] like Figures 1-4 As shown, this utility model provides a technical solution: a positioning fixture for machining an internal gear ring, including a mounting plate 1, an electric push rod 2 fixedly mounted on the lower surface of the mounting plate 1, a fixed seat 5 fixedly mounted on the upper surface of the mounting plate 1, a fixing mechanism 3 inside the fixed seat 5, and a promoting mechanism 4 inside the fixed seat 5. The fixing mechanism 3 includes a reinforcing ring 301, a moving plate 302, a connecting block 303, an expansion sleeve 304, a movable groove 305, a straight rod 306, a return spring 307, and a sliding block 308.

[0024] In one embodiment of this utility model, a reinforcing ring 301 is fixedly installed on the arc surface of a fixed base 5, a connecting block 303 is fixedly installed on the movable end of an electric push rod 2, a movable plate 302 is fixedly installed on the surface of the connecting block 303, an expansion sleeve 304 is fixedly installed on the upper surface of the movable plate 302, a movable groove 305 is formed in the inner wall of the fixed base 5, a straight rod 306 is fixedly installed on the inner wall of the movable groove 305, a return spring 307 is fixedly installed on the inner wall of the movable groove 305, and a sliding block 308 is fixedly connected to the end of the return spring 307 away from the movable groove 305.

[0025] In addition, the promoting mechanism 4 includes a rubber strip 401, which is fixedly installed on the arc surface of the expansion sleeve 304. The rubber strip 401 is in the shape of an outward V-shape, and the V-shaped rubber strip 401 can better spread out and fit the arc surface of the inner gear ring.

[0026] In this embodiment of the invention, a plurality of expansion sleeves 304 are provided, and the plurality of expansion sleeves 304 are uniformly fixedly installed on the upper surface of the moving plate 302 in a circumferential array. The arrangement of multiple expansion sleeves 304 facilitates the fixing of the internal gear ring. The expansion sleeves 304 are made of flexible material, and gaps are left between the multiple expansion sleeves 304 to facilitate deformation of the expansion sleeves 304 when fixing the internal gear ring. The arc surface of the expansion sleeve 304 is fixedly installed on the side of the sliding block 308 away from the fixed base 5, thereby the sliding block 308 The movement of the sliding block 308 can drive the expansion sleeve 304 to move. The sliding block 308 is sleeved on the arc surface of the straight rod 306, so that the sliding block 308 can slide on the arc surface of the straight rod 306. The movable end of the electric push rod 2 passes through the surface of the mounting plate 1, and the movable end of the electric push rod 2 is fixed at the lower end of the mounting base 5, so that the movable end of the electric push rod 2 can drive the moving plate 302 to move. The opening of the mounting base 5 is arc-shaped, and the shape of the opening of the mounting base 5 is adapted to the outer diameter of the internal gear ring, so that the internal gear ring can be fixed at the opening of the mounting base 5.

[0027] In this invention, during use, the internal gear ring is placed at the opening of the fixed base 5. As the electric push rod 2 moves downward, it drives the expansion sleeve 304 to move, and the sliding block 308 moves accordingly. The return spring 307 deforms, and the arc shape of the fixed base 5 near the opening causes the inner straight wall of the expansion sleeve 304 to begin to contract towards the axis, making the gap between the inner straight wall of the expansion sleeve 304 and the outer cylindrical surface of the internal gear ring smaller and smaller. This ensures stable fixation of the arc surface of the internal gear ring. When not processing, the electric push rod 2 resets, and the return spring 307 resets, promoting the reset of the expansion sleeve 304. This facilitates multiple fixations of the internal gear ring in the next process, ensuring the accuracy of the internal gear ring after processing.

[0028] Furthermore, the figure-eight shaped rubber strip 401 expands better to fit the arc surface of the internal gear ring, and in conjunction with the clamping of the expansion sleeve 304, it has a good clamping effect on the axial direction of the internal gear ring, ensuring the accuracy of the internal gear ring after processing.

[0029] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A positioning fixture for machining an internal gear ring, comprising a mounting plate (1), wherein an electric push rod (2) is fixedly mounted on the lower surface of the mounting plate (1), and a fixing seat (5) is fixedly mounted on the upper surface of the mounting plate (1), characterized in that: The fixing base (5) is provided with a fixing mechanism (3) inside, and the fixing base (5) is provided with a promoting mechanism (4) inside. The fixing mechanism (3) includes: A reinforcing ring (301) is fixedly installed on the arc surface of the fixed base (5). A connecting block (303) is fixedly installed on the movable end of the electric push rod (2). A movable plate (302) is fixedly installed on the surface of the connecting block (303). An expansion sleeve (304) is fixedly installed on the upper surface of the movable plate (302). An active groove (305) is formed on the inner wall of the fixed base (5). A straight rod (306) is fixedly installed on the inner wall of the active groove (305). A return spring (307) is fixedly installed on the inner wall of the active groove (305). A sliding block (308) is fixedly connected to one end of the return spring (307) away from the active groove (305).

2. The inner ring machining positioning tooling according to claim 1, characterized in that: The promoting mechanism (4) includes a rubber strip (401), which is fixedly installed on the arc surface of the expansion sleeve (304).

3. The inner ring machining positioning tooling according to claim 2, characterized in that: The rubber strip (401) is shaped like an outward V.

4. The inner ring machining positioning tooling according to claim 1, characterized in that: The number of expansion sleeves (304) is set to several, and the several expansion sleeves (304) are uniformly fixedly installed on the upper surface of the movable plate (302) in a circumferential array.

5. The inner ring machining positioning tooling according to claim 1, characterized in that: The sliding block (308) is fixedly mounted on the arc surface of the expansion sleeve (304) on the side away from the fixed seat (5).

6. The inner ring machining positioning tooling according to claim 1, characterized in that: The sliding block (308) is sleeved on the arc surface of the straight rod (306).

7. The inner ring machining positioning tooling according to claim 1, characterized in that: The movable end of the electric push rod (2) penetrates the surface of the mounting plate (1) and the lower end of the movable end fixing seat (5) of the electric push rod (2).

Images