A gear puller for a speed reducer

Abstract

The utility model relates to the field of speed reducer manufacturing discloses a speed reducer gear dismounting tool, including base body part, sleeve part and top pressure part, top pressure part installs on the base body part, the base body part shapes a cavity with one side opening, sleeve part is screwed in the mouth portion of cavity, sleeve part includes a pair of split setting semicircle chuck, through split setting semicircle chuck composition sleeve part, can be completely wrapped from the gear both sides, compared with three claw pull horse, the contact area with gear increases greatly, effectively avoids the occurrence of skidding phenomenon in the process of dismounting, significantly improves the stability and reliability of dismounting.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer manufacturing, and in particular to a speed reducer gear disassembly tool. Background Technology

[0002] In the manufacturing process of speed reducers, the disassembly of speed reducer gears is a common and important task. Currently, the industry widely uses three-jaw pullers to disassemble speed reducer gears. As disclosed in CN103465221A, a three-jaw puller suitable for disassembling bearings and other components of various sizes includes three pull claws, a puller seat, and a lead screw. The pull claws are movably mounted on the puller seat, and one end of each pull claw has an inwardly curved hook. The puller seat and the lead screw are connected by threads. The puller seat has three mounting brackets evenly distributed circumferentially, and each mounting bracket has several mounting holes. The pull claws are mounted in the mounting holes using bolts and nuts.

[0003] When disassembling gears, the three-jaw puller relies primarily on its three jaws contacting the gear's edge, with a lead screw abutting against the shaft. Rotating the lead screw generates tension to separate the gear from the shaft. However, this disassembly method has several drawbacks: First, during disassembly, the contact area between the three-jaw puller's jaws and the gear surface is relatively small, making it prone to slippage under high tension, hindering the disassembly process. Second, if slippage occurs, the three-jaw puller may suddenly spring back due to uneven force, potentially causing unexpected damage to other components of the reducer, increasing maintenance costs, and posing a serious threat to the operator's safety. Utility Model Content

[0004] The purpose of this utility model is to provide a gear disassembly tool for a speed reducer. The tool consists of a sleeve composed of a split semi-circular chuck, which can completely wrap around the gear from both sides. Compared with a three-jaw puller, the contact area with the gear is greatly increased, effectively avoiding slippage during disassembly and significantly improving the stability and reliability of disassembly.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A gear disassembly tool for a speed reducer includes a base, a sleeve, and a pressing part, wherein the pressing part is mounted on the base.

[0007] The base portion is formed with a cavity open on one side, and the ferrule portion is screwed onto the opening of the cavity; the ferrule portion includes a pair of separately arranged semi-circular chucks. When disassembling the gear, the two semi-circular chucks are first inserted from both sides of the gear, and the two semi-circular chucks are aligned to form the ferrule portion. At this time, the gear is located inside the ferrule portion. Then, the base portion is screwed onto the ferrule portion, and the pressing part works and abuts against the axle. At this time, the direction of the force of the pressing part on the axle is opposite to the direction of the force of the ferrule portion on the gear, thereby driving the gear and the axle to move relative to each other, so that the gear disengages from the axle, completing the gear disassembly.

[0008] Furthermore, the semicircular chuck includes a semicircular ring plate, the outer edge of which is formed with an axially protruding semicircular ring, and the outer wall of the semicircular ring is formed with external threads. The external threads are screwed into the opening of the cavity, and the external threads and the semicircular ring are mainly used for force transmission between the semicircular chuck and the base. The semicircular ring plate is used to support the gear, and the semicircular ring can restrict the relative position of the gear. When manufacturing the semicircular chuck, a full-circle sleeve part is first machined, and then the sleeve part is cut in half to form two semicircular chucks. This ensures that the external threads are continuous when the two semicircular chucks are mated together.

[0009] Furthermore, the outer edge of the semicircular ring plate is formed with a radially protruding flange. The flange can limit the range of movement of the base part on the chuck part, that is, after the end face of the cavity opening is pressed against the flange, the base part cannot continue to move. At the same time, the presence of the flange also makes it convenient for the operator to hold the semicircular chuck by hand, which facilitates the docking of the two semicircular chucks.

[0010] Furthermore, the end of the semicircular ring plate is formed with a pair of symmetrically arranged countersunk holes, one of which is fitted with a locating pin. When the two semicircular chucks are inserted from both sides of the gear, the locating pin on one semicircular chuck is inserted into the countersunk hole on the other semicircular chuck, thereby limiting the position of the two semicircular chucks and preventing misalignment, which facilitates screwing the base part onto the two semicircular chucks.

[0011] Furthermore, radially arranged studs are screwed onto the inner wall of the semi-circular annular plate;

[0012] The total number of studs on the two semi-circular chucks is greater than or equal to three. By adjusting the extension length of the studs, the diameter of the ring formed by the multiple studs can be adjusted, thus adapting to axles of different diameters and allowing the gear to be in approximately the middle position when disassembling it.

[0013] Furthermore, the base portion is formed with threaded holes that are configured in the same way as those in the center of the cavity;

[0014] The pressing part is a screw, which is screwed onto a threaded hole. Rotating the screw and the interaction between the screw and the threaded hole can bring the screw closer to the axle, thereby completing the gear disassembly.

[0015] This invention can also be configured such that the top pressing part is a hydraulic cylinder, which is fixed to the base part, and the piston rod of the hydraulic cylinder extends into the cavity. By extending the piston rod of the hydraulic cylinder, the labor intensity of gear disassembly can be reduced.

[0016] Furthermore, the hydraulic cylinder is connected to a manual hydraulic power unit via a pipeline. The manual hydraulic power unit is compact and lightweight, facilitating the carrying and transfer of the entire disassembly tool, and providing greater mobility.

[0017] The outstanding effect of this utility model is:

[0018] Compared with existing technologies, the chuck assembly, which consists of a split semi-circular chuck, can completely enclose the gear from both sides. Compared with a three-jaw puller, the contact area with the gear is greatly increased, effectively avoiding slippage during disassembly and significantly improving the stability and reliability of disassembly.

[0019] The positioning pins and countersunk holes allow for the alignment of the two semi-circular chucks, facilitating the installation of the base and improving the efficiency of gear disassembly.

[0020] When the top pressure section uses a hydraulic cylinder and is paired with a manual hydraulic station, the disassembly work intensity can be significantly reduced and the work efficiency improved. At the same time, the portability of the manual hydraulic station makes the entire disassembly tool suitable for a variety of work scenarios and has greater practicality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the semi-circular chuck of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0024] Reference numerals: 1. Base; 11. Cavity; 12. Threaded hole;

[0025] 2. Sleeve section; 21. Semi-circular chuck; 22. Locating pin; 23. Stud; 211. Semi-circular ring plate; 212. Semi-circular convex ring; 213. External thread; 214. Flange; 215. Countersunk hole;

[0026] 3. Top pressure section;

[0027] 4. Manual hydraulic station;

[0028] 90. Gear; 91. Axle. Detailed Implementation

[0029] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0030] The following is for reference Figures 1 to 3 The present invention will be described as follows: Example 1

[0031] like Figure 1 As shown, a gear disassembly tool for a speed reducer includes a base part 1, a sleeve part 2, and a pressing part 3, with the pressing part 3 mounted on the base part 1. The base part 1 is formed with a cavity 11 open on one side, and the sleeve part 2 is screwed into the opening of the cavity 11. The sleeve part 2 includes a pair of separate semi-circular chucks 21, and the base part 1 is formed with a threaded hole 12 that is the same as the one in the middle of the cavity 11. The pressing part 3 is a screw, and the pressing part 3 is screwed into the threaded hole 12.

[0032] like Figure 2 As shown, the semicircular chuck 21 includes a semicircular ring plate 211, with an axially protruding semicircular convex ring 212 formed on the outer edge of the semicircular ring plate 211. An external thread 213 is formed on the outer wall of the semicircular convex ring 212, and the external thread 213 is screwed into the opening of the cavity 11. The semicircular ring plate 211 supports the gear 90, and the semicircular convex ring 212 restricts the relative position of the gear 90. When manufacturing the semicircular chuck 21, a fully circular sleeve portion 2 is first machined, and then the sleeve portion 2 is cut in half to form two semicircular chucks 21. This ensures that the external thread 213 is continuous when the two semicircular chucks 21 are joined together.

[0033] The outer edge of the semicircular ring plate 211 is formed with a radially protruding flange 214. The flange 214 can limit the range of movement of the base part 1 on the sleeve part 2, that is, after the end face of the cavity 11 is pressed against the flange 214, the base part 1 cannot continue to move. At the same time, the presence of the flange 214 also makes it convenient for the operator to hold the semicircular chuck 21 by hand, which facilitates the docking of the two semicircular chucks 21.

[0034] The end of the semicircular ring plate 211 is formed with a pair of symmetrically arranged countersunk holes 215, one of which is fitted with a positioning pin 22. When the two semicircular chucks 21 are inserted from both sides of the gear 90, the positioning pin 22 on one semicircular chuck 21 is inserted into the countersunk hole 215 on the other semicircular chuck 21, thereby limiting the position of the two semicircular chucks 21 and preventing misalignment, which facilitates screwing the base part 1 onto the two semicircular chucks 21.

[0035] A radially arranged stud 23 is screwed onto the inner wall of the semi-circular ring plate 211;

[0036] The total number of studs 23 on the two semi-circular chucks 21 is greater than or equal to 3. By adjusting the extension length of the studs 23, the diameter of the ring formed by the multiple studs 23 can be adjusted, thereby adapting to wheel axles 91 of different diameters, and allowing the gear 90 to be in approximately the middle position when disassembling the gear 90.

[0037] Working principle: When using a screw as the pressing part 3 to disassemble gear 90, firstly, insert two semi-circular chucks 21 from both sides of gear 90, so that the positioning pins 22 are inserted into the corresponding countersunk holes 215, ensuring that the two semi-circular chucks 21 are accurately aligned. At this time, gear 90 is located in the sleeve part 2 composed of the two semi-circular chucks 21. Then, the base part 1 is screwed together with the external threads 213 on the semi-circular chucks 21 through the internal threads of its cavity 11 opening. Next, use a wrench to rotate the screw screwed into the threaded hole 12 of the base part 1. As the screw rotates, it gradually moves closer to the axle 91 and presses against the axle 91. Since the force applied by the screw is opposite to the force exerted by the sleeve part 2 on gear 90, under the action of this reverse force, gear 90 and axle 91 gradually move relative to each other until gear 90 disengages from axle 91, completing the disassembly work. Example 2

[0038] like Figure 3 As shown, the top pressing part 3 is a hydraulic cylinder, and the other structures are the same as in Embodiment 1. The hydraulic cylinder is fixed on the base part 1, and the piston rod of the hydraulic cylinder extends into the cavity 11.

[0039] The hydraulic cylinder is connected to a manual hydraulic power unit 4 via a pipe. The manual hydraulic power unit 4 is compact and lightweight, making it easy to carry and move the entire disassembly tool, and providing greater mobility. Disassembling the gear 90 using the hydraulic cylinder is more labor-saving and convenient than disassembling it by turning a screw.

[0040] Working principle: When using a hydraulic cylinder as the pressing part 3 to disassemble gear 90, the installation of the semi-circular chuck 21 and gear 90, as well as the screw connection between the base part 1 and the sleeve part 2, are completed first. Then, hydraulic oil is supplied to the hydraulic cylinder connected to the base part 1 via a manual hydraulic station 4, causing the piston rod of the hydraulic cylinder to extend and press against the axle 91. As the piston rod continues to extend, the force it applies to the axle 91 gradually increases, creating a counterforce with the force exerted by the sleeve part 2 on the gear 90, causing the gear 90 to separate from the axle 91, thus achieving the disassembly of gear 90.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A gear disassembly tool for a speed reducer, characterized in that: It includes a base part (1), a sleeve part (2) and a pressing part (3), with the pressing part (3) mounted on the base part (1); The base part (1) is formed with a cavity (11) with an opening on one side, and the sleeve part (2) is screwed into the opening of the cavity (11); the sleeve part (2) includes a pair of separate semi-circular chucks (21).

2. The gear disassembly tool for a speed reducer according to claim 1, characterized in that: The semicircular chuck (21) includes a semicircular ring plate (211), the outer edge of which is formed with an axially protruding semicircular ring (212), and the outer wall of the semicircular ring (212) is formed with an external thread (213).

3. The gear disassembly tool for a speed reducer according to claim 2, characterized in that: The outer edge of the semi-circular ring plate (211) is formed with a radially protruding flange (214).

4. A gear disassembly tool for a speed reducer according to claim 2, characterized in that: The end of the semi-circular ring plate (211) is formed with a pair of symmetrically arranged countersunk holes (215), and a positioning pin (22) is sleeved in one of the countersunk holes (215).

5. A gear disassembly tool for a speed reducer according to claim 2, characterized in that: A radially arranged stud (23) is screwed onto the inner wall of the semi-circular ring plate (211). The sum of the number of studs (23) on the two semicircular chucks (21) is greater than or equal to 3.

6. A gear disassembly tool for a speed reducer according to claim 1, characterized in that: The base part (1) is formed with a threaded hole (12) that is the same as the middle part of the cavity (11). The top pressing part (3) is a screw, and the top pressing part (3) is screwed onto the threaded hole (12).

7. A gear disassembly tool for a speed reducer according to claim 1, characterized in that: The top pressing part (3) is a hydraulic cylinder, which is fixed on the base part (1), and the piston rod of the hydraulic cylinder extends into the cavity (11).

8. A gear disassembly tool for a speed reducer according to claim 7, characterized in that: The hydraulic cylinder is connected to a manual hydraulic station (4) via a pipeline.

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