Extrusion forming tool for machining flexible gear of speed reducer

Abstract

The utility model relates to the technical field of speed reducer production, in particular to an extrusion forming tool for machining a flexible gear of a speed reducer, which is reasonable in structural design and comprises a flexible gear positioning extrusion component and a lifting rotary type pressure-bearing component which are matched with each other, and an unmachined flexible gear component is positioned and placed by a positioning convex pipe. A first motor is used for driving a rotary disc to rotate, so that the flexible gear component is transferred to an extrusion station, a lifting push rod drives a pressure-bearing sleeve to move downwards and sleeve the flexible gear component, an extrusion mechanism is started to extrude the cylinder part of the flexible gear component, then the extrusion mechanism is reset, and the pressure-bearing sleeve adsorbs and locks the flexible gear component to rotate through a suction cup; the rotation driver is used for driving the flexible gear component to rotate, the extrusion mechanism can be used for carrying out the next extrusion operation, the convex arch part can be machined and formed on the cylinder part of the flexible gear component through multiple extrusion operations, and the convex arch part can improve the axial tensile property of the speed reducer flexible gear.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer manufacturing technology, and in particular to an extrusion molding tooling for processing speed reducer flexural wheels. Background Technology

[0002] The flex wheel plays a crucial role in harmonic reducers. The following is a detailed explanation of the flex wheel's function in harmonic reducers: 1) Harmonic reducers mainly consist of three basic components: a wave generator, a flex wheel, and a rigid wheel. The flex wheel, as a core component, is key to realizing the harmonic transmission principle. In a harmonic reducer, the flex wheel typically has external teeth that mesh with the internal teeth of the rigid wheel, thereby transmitting motion and energy. 2) The most significant characteristic of the flex wheel is its ability to generate controllable elastic deformation under the action of the wave generator. When the wave generator rotates, its non-circular profile applies periodic pressure to the flex wheel, forcing it to undergo corresponding elastic deformation. This deformation causes the outer profile of the flex wheel to exhibit a periodic elliptical shape change, thus achieving engagement and disengagement with the rigid wheel at different positions. This unique meshing method not only improves the transmission accuracy and stability but also greatly increases the transmission's flexibility and adaptability. 3) Because the meshing between the flex wheel and the rigid wheel involves multiple teeth simultaneously, errors can be averaged out, thereby improving transmission accuracy. This gives harmonic reducers a significant advantage in high-precision operations, such as chip manufacturing and neurosurgery. In these fields, even minute deviations can lead to serious consequences, and the high-precision transmission characteristics of harmonic reducers ensure operational accuracy and reliability.

[0003] To improve the axial tensile strength of the flexure in a harmonic reducer, a convex arch-shaped tensile structure can be machined into the cylinder of the flexure.

[0004] Existing extrusion molding fixtures for processing reducer flexures have shortcomings in use. They cannot achieve continuous extrusion molding of the convex arch-shaped tensile structure of the reducer flexure, resulting in relatively low processing efficiency. Therefore, optimization and improvement are necessary. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned problems in the traditional technology and provide an extrusion molding tooling for processing the flexural gear of a speed reducer.

[0006] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0007] An extrusion molding fixture for processing a speed reducer flexure includes a flexure positioning and extrusion assembly and a lifting and rotating pressure bearing assembly disposed above it.

[0008] The flexible wheel positioning and extrusion assembly includes a base plate, a first motor, a turntable, positioning protrusions, an inner ring body, an outer ring body, an inner ring sleeve, an outer ring sleeve, and an extrusion mechanism. The first motor, the inner ring sleeve, and the outer ring sleeve are mounted on the upper side of the base plate. The turntable is mounted on the output end of the first motor. Several positioning protrusions are mounted circumferentially on the upper side of the turntable. An inner ring body that slides and is restricted in the inner ring sleeve and an outer ring body that slides and is restricted in the outer ring sleeve are mounted on the lower side of the turntable. An extrusion mechanism is mounted on the turntable near the positioning protrusions. The extrusion mechanism consists of a second motor, a lead screw, a support plate, and an extrusion head. The output end of the second motor is connected to a lead screw. The lead screw has two lead screw sections with opposite directions of rotation. A support plate is sleeved on the lead screw section. An extrusion head is provided on the upper outer wall of the support plate.

[0009] The lifting and rotating pressure-bearing assembly includes a top plate, a lifting push rod, a rotary driver, a pressure-bearing sleeve, and a suction cup. The lifting push rod is installed on the lower side of the top plate. The pressure-bearing sleeve is installed on the movable end of the lifting push rod via the rotary driver. The suction cup is embedded in the top of the pressure-bearing sleeve. An annular pressure-bearing groove is formed on the inner wall of the pressure-bearing sleeve.

[0010] Furthermore, in the extrusion molding tooling for processing the flexure of the speed reducer described above, the flexure component is composed of an end plate, a cylindrical part and a flexure part. The end plate is connected to the flexure part via the cylindrical part, and the cylindrical part can be processed into a convex arch part via a flexure positioning extrusion assembly and a lifting and rotating pressure bearing assembly.

[0011] Furthermore, in the extrusion molding fixture for processing the reducer flexure described above, the second motor is mounted on the lower side of the turntable and located in the inner region of the inner ring.

[0012] Furthermore, in the extrusion molding tooling for processing the flexural gear of the aforementioned reducer, the lead screw is provided with movable support by the inner ring body and the outer ring body.

[0013] Furthermore, in the extrusion molding fixture for processing the reducer flexural wheel described above, the disc body of the turntable located inside the positioning convex tube is provided with a radial sliding groove, the width of the radial sliding groove is matched with the width of the support plate, and the sliding of the support plate is restricted in the radial sliding groove.

[0014] Furthermore, in the extrusion molding tooling for processing the flexure of the speed reducer described above, the height value of the positioning convex tube is matched with the axial length value of the flexure portion, and the shape of the extrusion head is matched with the inner wall shape of the convex arch portion.

[0015] Furthermore, in the extrusion molding tooling for processing the flexure of the speed reducer described above, the shape of the suction cup matches the shape of the end plate of the flexure component.

[0016] Furthermore, in the extrusion molding tooling for processing the flexural gear of the speed reducer described above, the shape of the annular pressure-bearing groove matches the shape of the outer wall of the convex arch.

[0017] The beneficial effects of this utility model are:

[0018] This utility model has a reasonable structural design, comprising a flexible wheel positioning and extrusion assembly and a lifting and rotating pressure bearing assembly. The flexible wheel positioning and extrusion assembly mainly consists of a base plate, a first motor, a turntable, a positioning convex tube, an inner ring body, an outer ring body, an inner ring sleeve, an outer ring sleeve, and an extrusion mechanism. The lifting and rotating pressure bearing assembly mainly consists of a top plate, a lifting push rod, a rotary driver, a pressure bearing sleeve, and a suction cup. All components work together. The positioning convex tube is used to position and place the unprocessed flexible wheel component. The first motor drives the turntable to rotate, transferring the flexible wheel component to the extrusion station. The lifting push rod drives the pressure bearing sleeve to move down and fit over the outside of the flexible wheel component. The extrusion mechanism is then activated to extrude the cylindrical part of the flexible wheel component. After the extrusion mechanism resets, the pressure bearing sleeve uses the suction cup to hold and lock the flexible wheel component in place. The rotary driver then drives the flexible wheel component to rotate, allowing for the next extrusion operation. Through multiple extrusion operations, a convex arch can be formed on the cylindrical part of the flexible wheel component. The convex arch improves the axial tensile strength of the reducer's flexible wheel.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the above advantages at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a structural schematic diagram of the flexible wheel component in this utility model;

[0023] Figure 3 This is a schematic diagram of the flexible wheel positioning and extrusion assembly in this utility model;

[0024] Figure 4 This is a top view of the ring body and the ring sleeve in this utility model;

[0025] Figure 5 This is a schematic diagram of the extrusion mechanism in this utility model;

[0026] Figure 6 This is a schematic diagram of the lifting and rotating pressure-bearing component in this utility model;

[0027] In the attached diagram, the components represented by each number are as follows:

[0028] 1-Flexible wheel positioning extrusion assembly, 101-Base plate, 102-First motor, 103-Turntable, 104-Positioning protrusion, 105-Inner ring body, 106-Outer ring body, 107-Inner ring sleeve, 108-Outer ring sleeve, 109-Second motor, 110-Screw, 111-Support plate, 112-Extrusion head;

[0029] 2-Slider, 201-Top plate, 202-Lifting push rod, 203-Rotary drive, 204-Pressure sleeve, 205-Suction cup, 206-Annular pressure groove;

[0030] 3-Flexible wheel component, 301-End plate, 302-Cylinder section, 303-Flexible wheel section, 304-Protruding arch section. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] like Figures 1-6 As shown, this embodiment provides an extrusion molding fixture for processing a speed reducer flexure, including a flexure positioning and extrusion assembly 1 and a lifting and rotating pressure bearing assembly 2 disposed above it. The flexure component 3 is composed of an end plate 301, a cylindrical portion 302, and a flexure portion 303. The end plate 301 is connected to the flexure portion 303 via the cylindrical portion 302. The cylindrical portion 302 can be processed into a protruding arch portion 304 by the flexure positioning and extrusion assembly 1 and the lifting and rotating pressure bearing assembly 2.

[0033] In this embodiment, the flexible wheel positioning and extrusion assembly 1 includes a base plate 101, a first motor 102, a turntable 103, positioning protrusions 104, an inner ring body 105, an outer ring body 106, an inner ring sleeve 107, an outer ring sleeve 108, and an extrusion mechanism. The first motor 102, the inner ring sleeve 107, and the outer ring sleeve 108 are mounted on the upper side of the base plate 101. The turntable 103 is mounted at the output end of the first motor 102. A plurality of positioning protrusions 104 are circumferentially mounted on the upper side of the turntable 103. The inner ring body 105, which is slidably limited within the inner ring sleeve 107, and the outer ring body 106, which is slidably limited within the outer ring sleeve 108, are mounted on the lower side of the turntable 103. The extrusion mechanism is mounted on the turntable 103 near the positioning protrusions 104. The extrusion mechanism consists of a second motor 109, a lead screw 110, a support plate 111, and an extrusion head 112. The output end of the second motor 109 is connected to the lead screw 110. The lead screw 110 has two sections with opposite rotation directions. The support plate 111 is sleeved on the lead screw sections, and the extrusion head 112 is located on the upper outer wall of the support plate 111. When the second motor 109 rotates in the forward direction, the lead screw 110 drives the two support plates 111 to move away from each other, achieving extrusion. When the second motor 109 rotates in the reverse direction, the lead screw 110 drives the two support plates 111 to move closer together, achieving resetting.

[0034] In this embodiment, the second motor 109 is installed on the lower side of the turntable 103 and located in the inner region of the inner ring 105.

[0035] In this embodiment, the lead screw 110 is provided with movable support by the inner ring 105 and the outer ring 106.

[0036] In this embodiment, the turntable 103 is provided with a radial groove in the disc body located inside the positioning protrusion tube 104. The width of the radial groove matches the width of the support plate 111, and the support plate 111 slides and is restricted in the radial groove.

[0037] In this embodiment, the height of the positioning protrusion 104 is matched with the axial length of the flexible wheel portion 303, and the shape of the extrusion head 112 is matched with the inner wall shape of the arch portion 304.

[0038] In this embodiment, the lifting and rotating pressure-bearing assembly 2 includes a top plate 201, a lifting push rod 202, a rotary driver 203, a pressure-bearing sleeve 204, and a suction cup 205. The lifting push rod 202 is mounted on the lower side of the top plate 201, and the pressure-bearing sleeve 204 is mounted on the movable end of the lifting push rod 202 via the rotary driver 203. The suction cup 205 is embedded at the top of the inner cavity of the pressure-bearing sleeve 204, and an annular pressure-bearing groove 206 is formed on the inner wall of the pressure-bearing sleeve 204.

[0039] In this embodiment, the shape of the suction cup 205 matches the shape of the end plate 301 in the flexible wheel component 3.

[0040] In this embodiment, the shape of the annular pressure-bearing groove 206 matches the shape of the outer wall of the convex arch 304.

[0041] A specific application of this embodiment is as follows: This tooling includes a flexible wheel positioning and extrusion assembly 1 and a lifting and rotating pressure bearing assembly 2. The flexible wheel positioning and extrusion assembly 1 mainly consists of a base plate 101, a first motor 102, a turntable 103, a positioning protrusion tube 104, an inner ring body 105, an outer ring body 106, an inner ring sleeve 107, an outer ring sleeve 108, and an extrusion mechanism. The lifting and rotating pressure bearing assembly 2 mainly consists of a top plate 201, a lifting push rod 202, a rotary driver 203, a pressure bearing sleeve 204, and a suction cup 205. The components work together to position the unprocessed flexible wheel component 3 using the positioning protrusion tube 104, and drive it using the first motor 102. The turntable 103 rotates, causing the flexible wheel component 3 to move to the extrusion station. The lifting push rod 202 drives the pressure sleeve 204 to move down and fit on the outside of the flexible wheel component 3. The extrusion mechanism is started to extrude the cylindrical part 302 of the flexible wheel component 3. Then the extrusion mechanism is reset. The pressure sleeve 204 uses the suction cup 205 to attract and lock the rotation of the flexible wheel component 3. The rotary driver 203 drives the flexible wheel component 3 to rotate, and the extrusion mechanism can be used to perform the next extrusion operation. Through multiple extrusion operations, a convex arch 304 can be formed on the cylindrical part 302 of the flexible wheel component 3. The convex arch 304 can improve the axial tensile strength of the reducer flexible wheel.

[0042] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to specific implementation methods. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An extrusion molding tooling for machining a speed reducer flexspline, characterized in that, It includes a flexible wheel positioning and extrusion assembly and a lifting and rotating pressure-bearing assembly located above it; The flexible wheel positioning and extrusion assembly includes a base plate, a first motor, a turntable, positioning protrusions, an inner ring body, an outer ring body, an inner ring sleeve, an outer ring sleeve, and an extrusion mechanism. The first motor, the inner ring sleeve, and the outer ring sleeve are mounted on the upper side of the base plate. The turntable is mounted on the output end of the first motor. Several positioning protrusions are mounted circumferentially on the upper side of the turntable. An inner ring body that slides and is restricted in the inner ring sleeve and an outer ring body that slides and is restricted in the outer ring sleeve are mounted on the lower side of the turntable. An extrusion mechanism is mounted on the turntable near the positioning protrusions. The extrusion mechanism consists of a second motor, a lead screw, a support plate, and an extrusion head. The output end of the second motor is connected to a lead screw. The lead screw has two lead screw sections with opposite directions of rotation. A support plate is sleeved on the lead screw section. An extrusion head is provided on the upper outer wall of the support plate. The lifting and rotating pressure-bearing assembly includes a top plate, a lifting push rod, a rotary driver, a pressure-bearing sleeve, and a suction cup. The lifting push rod is installed on the lower side of the top plate. The pressure-bearing sleeve is installed on the movable end of the lifting push rod via the rotary driver. The suction cup is embedded in the top of the pressure-bearing sleeve. An annular pressure-bearing groove is formed on the inner wall of the pressure-bearing sleeve.

2. The extrusion molding tooling for machining the flexspline of a speed reducer according to claim 1, characterized in that, The flexible wheel component consists of an end plate, a cylindrical part, and a flexible wheel part. The end plate is connected to the flexible wheel part via the cylindrical part. The cylindrical part can be processed into a convex arch part by a flexible wheel positioning extrusion assembly and a lifting and rotating pressure bearing assembly.

3. The extrusion molding tooling for machining the flexspline of a speed reducer according to claim 2, characterized in that, The second motor is mounted on the underside of the turntable and located in the inner area of ​​the inner ring.

4. The extrusion molding tooling for machining the flexspline of a speed reducer according to claim 3, characterized in that, The lead screw is provided with movable support by an inner ring and an outer ring.

5. The extrusion molding fixture for machining the flexspline of a speed reducer according to claim 4, characterized in that, The turntable, located inside the positioning convex tube, has a radial groove. The width of the radial groove matches the width of the support plate, and the sliding of the support plate is restricted within the radial groove.

6. The extrusion molding tooling for machining the flexspline of a speed reducer according to claim 5, characterized in that, The height of the positioning convex tube is matched with the axial length of the convex arch, and the shape of the extrusion head is matched with the inner wall shape of the convex arch.

7. The extrusion molding tooling for machining the flexspline of a speed reducer according to claim 6, characterized in that, The shape of the suction cup matches the shape of the end plate in the flexible wheel component.

8. The extrusion molding tooling for machining the flexspline of a speed reducer according to claim 7, characterized in that, The shape of the annular pressure-bearing groove matches the shape of the outer wall of the convex arch.

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