Inner support type wave generator press-fitting jig for harmonic reducer

Abstract

The utility model discloses an inner supporting type wave generator press-fitting jig for a harmonic reducer, and relates to the technical field of harmonic reducer assembly. The utility model provides an inner support type wave generator press fitting jig for a harmonic reducer, which comprises a mounting seat, an air cylinder fixedly connected to the mounting seat through a support, a press fitting block fixedly connected to the telescopic end of the air cylinder, a flexible bearing placed at the top end of the mounting seat, and four first guide rods fixedly connected to the inner top end of the mounting seat. And the sliding frame is slidably connected among the four first guide rods. The flexible bearing is placed on the mounting base, the flexible bearing is arranged on the outer side of the opening ejector block in a sleeving mode, the driving motor drives the two-way screw to rotate, the opening ejector block is controlled to slide back to back to open the flexible bearing into an oval shape matched with the oval cam from inside to outside, and then the air cylinder drives the pressing block to move downwards. In this way, it can be ensured that the flexible bearing deforms in place, and meanwhile rigid extrusion between the inner ring, the outer ring and the balls can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of harmonic reducer assembly, in particular to an inner support type wave generator press-fitting jig for a harmonic reducer. Background Technique

[0002] A harmonic reducer is a precision transmission device. One of its core components is a wave generator, which is responsible for converting rotational motion into elliptical motion of the flexspline. The wave generator consists of an elliptical cam and a flexible bearing. When assembling the wave generator, a special press-fitting jig is required to press the elliptical cam into the flexible bearing.

[0003] The patent with the patent authorization announcement number CN116728049A discloses an automatic press-fitting device for a wave generator. The automatic press-fitting device for the wave generator includes a first handling manipulator, a press-fitting device, a positioning jig, and a flexible bearing deformation clamping device. The automatic press-fitting device for the wave generator clamps and extrudes the flexible bearing from the outside through the flexible bearing deformation clamping device to deform it to fit the outer contour of the cam. However, there are some problems with extruding the flexible bearing from the outside to the inside. One is the existence of play in the flexible bearing, that is, there is a certain gap between the inner and outer rings of the flexible bearing and the balls. When extruding the flexible bearing from the outside to the inside, the outer ring deforms first and then drives the inner ring to deform through the balls. However, due to the existence of the gap, the inner ring may not be deformed in place, and the flexible bearing will be damaged during press-fitting. The other is that after extrusion molding, when the elliptical cam is inserted into the flexible bearing, the outer ring of the flexible bearing is fixed by the jig, and the inner ring is fixed by the elliptical cam. The middle balls will rub against the inner and outer rings under pressure, damaging the ball raceways of the balls and the inner and outer rings, affecting the normal use of the wave generator, and causing various problems such as jamming and abnormal noise in the entire reducer.

[0004] To solve the above problems, we propose an inner support type wave generator press-fitting jig for a harmonic reducer. This press-fitting jig can ensure that the flexible bearing is deformed in place by extruding the flexible bearing from the inside to the outside, and at the same time, it can also avoid the hard extrusion between the inner and outer rings and the balls. Content of the Utility Model

[0005] In order to overcome the shortcomings that the existing press-fitting equipment extrudes the flexible bearing from the outside to the inside, and the flexible bearing has problems such as incomplete deformation and being damaged by hard extrusion, the utility model provides an inner support type wave generator press-fitting jig for a harmonic reducer. This press-fitting jig can ensure that the flexible bearing is deformed in place by extruding the flexible bearing from the inside to the outside, and at the same time, it can also avoid the hard extrusion between the inner and outer rings and the balls.

[0006] The technical solution of the present utility model is: an inner support type wave generator press-fitting fixture for a harmonic reducer, which includes a mounting base. A cylinder is fixedly connected to the mounting base through a bracket. The telescopic end of the cylinder is fixedly connected with a pressing block. A flexible bearing is placed on the top of the mounting base. Four first guide rods are fixedly connected to the inner top of the mounting base. A sliding frame is slidably connected between the four first guide rods. A first spring is connected between the sliding frame and the first guide rods. A bidirectional screw rod is rotatably connected to the sliding frame. Two longitudinally symmetrically arranged spreading top blocks are slidably connected to the sliding frame. The spreading top blocks are threadedly connected to the bidirectional screw rod. A driving motor is fixedly connected to the sliding frame. The output shaft of the driving motor is fixedly connected to the bidirectional screw rod. A positioning component for supporting and positioning the elliptical cam is provided on the mounting base. An opening component for automatically controlling the opening of the positioning component is provided on the mounting base.

[0007] In one embodiment, the top of the spreading top block is semi-cylindrical, which is used to squeeze and deform the flexible bearing from the inside to the outside.

[0008] In one embodiment, the positioning component includes a sliding seat, which is slidably connected to the top of the mounting base. Second springs are longitudinally symmetrically connected between the sliding seat and the mounting base. Two longitudinally symmetrically arranged sliding rods are slidably connected to the top of the sliding seat. A positioning block for supporting and positioning the elliptical cam is fixedly connected to the inner end of the sliding rod. Two laterally symmetrically arranged second guide rods are fixedly connected to the sliding seat. A guide plate is slidably connected to the second guide rods.

[0009] In one embodiment, two strip-shaped grooves are formed on the guide plate. A protruding portion is provided at the top of the positioning block, and the protruding portion of the positioning block is located in the adjacent strip-shaped groove.

[0010] In one embodiment, the opening component includes a third spring, which is connected between the guide plate and the adjacent second guide rod. A contact rod is fixedly connected to the guide plate. Two laterally symmetrically arranged mating plates are fixedly connected to one side of the mounting base close to the contact rod.

[0011] In one embodiment, an inclined bending portion is provided on the mating plate, and the contact rod is in pressing fit with the adjacent mating plate.

[0012] The beneficial effects are as follows: 1. Place the flexible bearing on the mounting base, so that the flexible bearing is sleeved outside the spreading top block. Drive the bidirectional screw rod to rotate through the driving motor, control the spreading top blocks to slide away from each other to expand the flexible bearing into an ellipse adapted to the elliptical cam from the inside to the outside. Then drive the pressing block to move downward through the cylinder, and further push the elliptical cam into the flexible bearing. In this way, it can ensure that the flexible bearing is deformed in place, and at the same time, it can also avoid the hard extrusion between the inner and outer rings and the balls.

[0013] 2. The elliptical cam is placed between four positioning blocks, and the positioning blocks support and position the elliptical cam. When the elliptical cam moves downward for press-fitting, the contact rod and the mating plate cooperate to automatically control the positioning blocks on both sides to move outward and separate from the elliptical cam, so that the elliptical cam can be completely inserted into the flexible bearing. Brief Description of the Drawings

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model.

[0015] Figure 2 It is a three-dimensional structural schematic diagram of components such as the mounting base, cylinder and pressing block of the present utility model.

[0016] Figure 3 It is a three-dimensional structural schematic diagram of components such as the sliding frame, spreading top block and bidirectional screw of the present utility model.

[0017] Figure 4 It is a three-dimensional structural schematic diagram of components such as the first guide rod, sliding frame and first spring of the present utility model.

[0018] Figure 5 It is a three-dimensional structural schematic diagram of components such as the sliding seat, second spring and sliding rod of the present utility model.

[0019] Figure 6 It is a three-dimensional structural schematic diagram of components such as the guide plate, contact rod and mating plate of the present utility model.

[0020] In the reference numerals: 1 - mounting base, 2 - cylinder, 3 - pressing block, 4 - flexible bearing, 5 - elliptical cam, 6 - first guide rod, 7 - sliding frame, 8 - first spring, 9 - bidirectional screw, 10 - spreading top block, 11 - drive motor, 12 - sliding seat, 13 - second spring, 14 - sliding rod, 15 - positioning block, 16 - second guide rod, 17 - guide plate, 18 - third spring, 19 - contact rod, 20 - mating plate. Detailed Description of the Embodiment

[0021] The following describes the embodiments of the present utility model in detail with reference to the drawings.

[0022] Embodiment 1: An internal support type wave generator press-fitting jig for a harmonic reducer, as Figures 1-6As shown in the figure, it includes a mounting base 1, a cylinder 2, a pressing block 3, a flexible bearing 4, an elliptical cam 5, a first guide rod 6, a sliding frame 7, a first spring 8, a bidirectional screw 9, a spreading top block 10, a driving motor 11, a positioning component and a spreading component. At the rear of the mounting base 1, a cylinder 2 is fixedly connected through a bracket. The telescopic end of the cylinder 2 is fixedly connected with a pressing block 3. A flexible bearing 4 is placed on the upper side of the mounting base 1. Four first guide rods 6 are fixedly connected to the upper inner side of the mounting base 1. A sliding frame 7 is slidably connected between the four first guide rods 6. A first spring 8 is connected between the sliding frame 7 and the first guide rods 6. A bidirectional screw 9 is rotatably connected to the sliding frame 7. Two symmetrically arranged spreading top blocks 10 are slidably connected to the upper part of the sliding frame 7 in the front and back directions. The top of the spreading top block 10 is semi-cylindrical and is used to squeeze and deform the flexible bearing 4 from the inside and outside. The spreading top block 10 is threadedly connected to the bidirectional screw 9. A driving motor 11 is fixedly connected to the front part of the sliding frame 7. The output shaft of the driving motor 11 is fixedly connected to the bidirectional screw 9. A positioning component for supporting and positioning the elliptical cam 5 is provided on the mounting base 1. A spreading component for automatically controlling the spreading of the positioning component is provided on the mounting base 1.

[0023] When using this device, the staff places the flexible bearing 4 on the mounting base 1, so that the flexible bearing 4 is sleeved outside the spreading top block 10, and places the elliptical cam 5 on the positioning component. After placing it well, the staff first drives the bidirectional screw 9 to rotate through the driving motor 11. The rotation of the bidirectional screw 9 drives the two spreading top blocks 10 in the front and back directions to slide away from each other. The sliding away of the spreading top blocks 10 spreads the flexible bearing 4 into an ellipse adapted to the elliptical cam 5. At this time, the staff then drives the pressing block 3 to move downward through the cylinder 2, and further pushes the elliptical cam 5 into the flexible bearing 4. When the elliptical cam 5 moves downward and inserts into the flexible bearing 4, the elliptical cam 5 will push the spreading top block 10 to move downward. The downward movement of the spreading top block 10 drives the sliding frame 7 to slide downward, and the first spring 8 deforms. When the pressing and installing are completed, the staff drives the pressing block 3 to move upward and reset through the cylinder 2. At this time, under the action of the reset of the first spring 8, the sliding frame 7 drives the spreading top block 10 to move upward and reset accordingly.

[0024] Embodiment 2: On the basis of Embodiment 1, as Figure 1 、 Figure 5 and Figure 6As shown, the positioning assembly includes a sliding seat 12, a second spring 13, a sliding rod 14, a positioning block 15, a second guide rod 16 and a guide plate 17. The sliding seat 12 is slidably connected to the upper side of the mounting seat 1, and the second springs 13 are connected between the left and right parts of the sliding seat 12 and the mounting seat 1, and the left and right parts of the upper side of the sliding seat 12 are slidably connected to the sliding rods 14 that are symmetrical front and back. The inner end of the sliding rod 14 is fixedly connected to the positioning block 15 for positioning and supporting the elliptical cam 5. The rear part of the sliding seat 12 is fixedly connected to the left and right symmetrical second guide rod 16, and the second guide rod 16 is slidably connected to the guide plate 17. The front part of the guide plate 17 has two strip grooves, and the upper side of the positioning block 15 is provided with a protrusion, and the protrusion of the positioning block 15 is located in the adjacent strip groove.

[0025] like Figure 6 As shown, the opening assembly includes a third spring 18, a contact rod 19 and a matching plate 20. The third spring 18 is connected between the guide plate 17 and the adjacent second guide rod 16. The contact rod 19 is fixedly connected to the rear side of the guide plate 17. A left-right symmetrical matching plate 20 is fixedly connected to the rear side of the mounting seat 1. An inclined bending portion is provided in the middle of the matching plate 20, and the contact rod 19 is squeezed and matched with the adjacent matching plate 20.

[0026] When using the device, the staff places the elliptical cam 5 between the four positioning blocks 15, and supports and positions the elliptical cam 5 through the positioning blocks 15. When the flexible bearing 4 is expanded, the staff controls the extension of the cylinder 2 to drive the pressing block 3 to move downward. The pressing block 3 moves downward to push the elliptical cam 5 to move downward. The flexible bearing 4 moves downward to drive the positioning block 15, the sliding rod 14, the sliding seat 12, the second guide rod 16, the guide plate 17 and the contact rod 19 to move downward together. The second spring 13 is deformed. When the contact rod 19 moves downward to contact the inclined surface on the matching plate 20, the contact rod 19 continues to move downward and will be squeezed to move backward. The contact rod 19 moves backward The guide plate 17 is driven to slide backwards, and the third spring 18 is deformed. The guide plate 17 slides backwards and pushes the positioning blocks 15 on the left and right sides to move outwards and separate from the elliptical cam 5, so that the elliptical cam 5 can be fully inserted into the flexible bearing 4. At the same time, after the positioning blocks 15 are separated from the elliptical cam 5, under the action of the second spring 13 resetting, the sliding seat 12, the sliding rod 14, the positioning blocks 15, the second guide rod 16, the guide plate 17 and the contact rod 19 will move upwards together. After the contact rod 19 moves upwards, it is no longer squeezed by the matching plate 20. At this time, under the action of the third spring 18 resetting, the guide plates 17 slide toward each other and reset, thereby driving the positioning blocks 15 on the left and right sides to move inwards and reset.

[0027] The embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above embodiments, and various changes can be made without departing from the gist of the present utility model within the scope of knowledge possessed by those skilled in the art.

Claims

1. A press-fitting fixture for an internally supported wave generator for a harmonic reducer, characterized in that: The invention comprises a mounting seat (1), a cylinder (2) is fixedly connected to the mounting seat (1) through a bracket, a pressing block (3) is fixedly connected to the telescopic end of the cylinder (2), a flexible bearing (4) is placed on the top of the mounting seat (1), four first guide rods (6) are fixedly connected to the top of the mounting seat (1), a sliding frame (7) is slidably connected between the four first guide rods (6), a first spring (8) is connected between the sliding frame (7) and the first guide rods (6), and a double spring (9) is rotatably connected to the sliding frame (7). The sliding frame (7) is slidably connected to a longitudinally symmetrical opening top block (10), the opening top block (10) is connected to the bidirectional screw (9) by threads, the sliding frame (7) is fixedly connected to a driving motor (11), the output shaft of the driving motor (11) is fixedly connected to the bidirectional screw (9), the mounting seat (1) is provided with a positioning component for supporting and positioning the elliptical cam (5), and the mounting seat (1) is provided with an opening component for automatically controlling the opening of the positioning component.

2. The internal support wave generator press-fitting fixture for a harmonic reducer according to claim 1, characterized in that: The top of the expanded top block (10) is semi-cylindrical and is used to squeeze and deform the flexible bearing (4) from inside and outside.

3. The internal support wave generator press-fitting jig for a harmonic reducer as claimed in claim 2, characterized in that: The positioning assembly comprises a sliding seat (12), the sliding seat (12) is slidably connected to the top of the mounting seat (1), a longitudinally symmetrical second spring (13) is connected between the sliding seat (12) and the mounting seat (1), a longitudinally symmetrical sliding rod (14) is slidably connected to the top of the sliding seat (12), a positioning block (15) for positioning and supporting an elliptical cam (5) is fixedly connected to the inner end of the sliding rod (14), a transversely symmetrical second guide rod (16) is fixedly connected to the sliding seat (12), and a guide plate (17) is slidably connected to the second guide rod (16).

4. The internal support wave generator press-fitting jig for a harmonic reducer as claimed in claim 3, characterized in that: The guide plate (17) is provided with two strip-shaped grooves, and the top end of the positioning block (15) is provided with a protruding portion, and the protruding portion of the positioning block (15) is located in the adjacent strip-shaped grooves.

5. The internal support wave generator press-fitting jig for a harmonic reducer as claimed in claim 4, characterized in that: The opening assembly comprises a third spring (18), the third spring (18) being connected between the guide plate (17) and the adjacent second guide rod (16), a contact rod (19) being fixedly connected to the guide plate (17), and a laterally symmetrical matching plate (20) being fixedly connected to one side of the mounting seat (1) close to the contact rod (19).

6. A press-fitting jig for an internally supported wave generator for a harmonic reducer as claimed in claim 5, characterized in that: The matching plate (20) is provided with an inclined bending portion, and the contact rod (19) is pressed and matched with the adjacent matching plate (20).

Images