Radial opening mechanism for annular elastic piece

Abstract

The radial opening mechanism comprises a disc-shaped base plate, a plurality of radial sliding grooves are evenly distributed in the surface of one side of the disc-shaped base plate in the annular direction, radial supporting rods are arranged in the radial sliding grooves in a sliding mode, and supporting blocks are arranged at the front ends of the radial supporting rods; a pull rod penetrates through the center of the disc-shaped base plate, and the front end of the pull rod is connected with the radial supporting rods through parallelogram hinge structures. When the pull rod moves backwards, the radial supporting rods can synchronously expand outwards in the radial direction, and the annular elastic piece is opened by the multiple supporting blocks. The pull rod is sleeved with a reset spring used for resetting the pull rod. The radial supporting rods expand outwards in the radial direction under the action of the pull rods and the parallelogram hinge structures, the opening effect of the annular elastic pieces is achieved, and the device is simple in structure, light in weight and convenient to move.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical assembly and relates to a radial expansion mechanism of an annular elastic member. Background Art

[0002] When installing an annular elastic part, such as the finger spring in a high-voltage switch, or a C-shaped elastic steel wire retaining ring used for limiting on a shaft part, it is generally necessary to first open the annular elastic part. Such parts have a large elasticity and are difficult to open manually. The automatic opening mechanism of an annular elastic structure disclosed in CN115194433A drives the claw to rise through a lifting assembly, and drives the claw to open the annular elastic structure through a driving member, which has the problems of complex structure and heavy weight. Summary of the invention

[0003] Purpose of the invention: The purpose of the invention is to provide a radial expansion mechanism of an annular elastic member which is simple in structure and lightweight.

[0004] Technical solution: A radial expansion mechanism of an annular elastic member of the present invention comprises a disc-shaped base plate, a plurality of radial grooves are evenly distributed along the circumferential direction on one side surface of the disc-shaped base plate, a radial support rod is slidably arranged in each radial groove, and a support block is arranged at the front end of the radial support rod; a pull rod is passed through the center of the disc-shaped base plate, and the front end of the pull rod is connected to each radial support rod through a parallelogram hinge structure; when the pull rod moves backward, each radial support rod can synchronously expand radially outward, and a plurality of support blocks expand the annular elastic member; a reset spring is sleeved on the pull rod to reset the pull rod.

[0005] Furthermore, a coupled disc-shaped hinge support is provided at the front end of the pull rod, and the coupled disc-shaped hinge support is composed of two coaxially arranged disc-shaped hinge supports fixedly connected by a connecting sleeve; two equal-length first connecting rods are hinged on each radial strut, and the other ends of the two first connecting rods are respectively hinged to the two disc-shaped hinge supports; the coupled disc-shaped hinge support, the radial strut and the two first connecting rods form the parallelogram hinge structure; the reset spring is located between the coupled disc-shaped hinge support and the disc-shaped base plate.

[0006] Furthermore, a plurality of radial grooves are evenly distributed on the circumferential surface of the disc hinge support, and an annular groove is also provided to communicate with the radial grooves, and the radial grooves correspond to the radial sliding grooves one by one; a wire ring is provided in the annular groove, and the other end of the first connecting rod is inserted into the radial groove and connected to the wire ring.

[0007] Furthermore, a handle frame is fixed on the other side of the disc-shaped base plate, a grip is arranged on the handle frame, and a hand pull ring is fixed on the rear end of the pull rod.

[0008] Optionally, the disc-shaped base plate is mounted on a robot arm, and the axial movement of the pull rod is controlled by a motor.

[0009] Furthermore, the outer side surface of the support block is an arc surface, and the outer side surface of each support block can form a fitting circle to adapt to the shape of the annular elastic member.

[0010] Furthermore, the cross-section of the radial slide groove is "convex" shaped, and the rear end of the radial support rod is provided with an adaptive slider, and the slider is slidably arranged in the radial slide groove.

[0011] Furthermore, the radial expansion mechanism of the annular elastic member also includes a pushing assembly, which includes a unloading push rod arranged in parallel on the outside of each radial support rod, and the unloading push rod is slidably matched with the radial support rod through a guide ring; a push block is provided at the front end of the unloading push rod, which is used to push the expanded annular elastic member from the support block, and the push block initially maintains a certain distance from the support block; a second connecting rod is hinged at the rear end of the unloading push rod, and the other end of the second connecting rod is hinged on the third hinge support, and the third hinge support is fixed in the corresponding radial slide groove.

[0012] Furthermore, the position of the third hinge support in the radial sliding groove is adjustable.

[0013] Furthermore, an open groove is provided on the third hinge support, and a conical fastening screw is provided in the open groove; when the fastening screw is loosened, the open groove contracts, and the third hinge support can slide along the radial slide groove; when the fastening screw is tightened, the open groove is expanded, and the third hinge support is clamped in the radial slide groove.

[0014] CN115194433A is inconvenient to move, and it is impossible to unload the annular elastic part, and it is not convenient to directly install the annular elastic part on the corresponding shaft. At the same time, it is not suitable for connection with a robot arm. The present invention has the advantages of simple structure, light weight, and is easy to move. Based on this, the present invention also designs a push assembly, which is linked to the radial expansion of the radial support rod, and no additional drive is required. It can be used by hand, directly docked with the installed shaft, and the push assembly is used to push the expanded annular elastic part out and put it on the installation shaft, greatly improving the installation efficiency of the annular elastic part. In addition, it can also be converted into a robot control, that is, the handle frame and the hand pull ring are removed, the disc-shaped base plate is connected to the robot arm, and the pull rod is driven axially by a motor. Such a modification can be applied to the installation production line. The present invention has important practical value.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: each radial strut expands radially outward under the action of the pull rod and the parallelogram hinge structure, achieving the effect of the annular elastic member opening, with a simple structure, light weight and easy movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 and Figure 2 : is a schematic structural diagram of a radial expansion mechanism of an annular elastic member provided in an embodiment of the present invention, wherein Figure 1 The annular elastic member is in a radially expanded state. Figure 2 The unloading push rod is in the ejection state;

[0017] Figure 3 is a schematic diagram of a parallelogram hinge structure in an embodiment of the present invention;

[0018] Figure 4 2 is a schematic diagram of the structure of the push assembly in an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Attached Figures 1 to 4 The reference numerals in the figures are as follows:

[0021] 0, annular elastic member; 1, disc-shaped base plate; 11, radial slide groove; 2, handle frame; 21, grip; 3, combined disc-shaped hinge support; 31, disc-shaped hinge support; 311, annular groove; 312, radial groove; 32, wire ring; 33, connecting sleeve; 4, hand pull ring; 41, pull rod; 42, return spring; 5, first connecting rod; 6, radial support rod; 61, first hinge support; 62, slider; 63, support block; 7, unloading push rod; 71, guide ring; 72, push block; 73, second hinge support; 8, second connecting rod; 9, third hinge support; 91, opening groove; 92, fastening screw.

[0022] like Figure 1 , Figure 3 and Figure 4 As shown, an embodiment of the present invention provides a radial expansion mechanism of an annular elastic member, comprising a disc-shaped base plate 1, a radial support rod 6, a pull rod 41 and a push assembly.

[0023] A plurality of radial grooves 11 are evenly distributed along the circumferential direction on one side of the disc-shaped base plate 1. In this embodiment, there are eight radial grooves 11. A handle frame 2 is fixed to the other side of the disc-shaped base plate 1. A grip 21 is arranged on the handle frame 2.

[0024] A radial support rod 6 is slidably disposed in each radial slide groove 11, and the radial support rod 6 is perpendicular to the disc-shaped base plate 1. Specifically, the cross section of the radial slide groove 11 is "convex", and the rear end of the radial support rod 6 has an adapted slider 62, and the slider 62 is slidably disposed in the radial slide groove 11. A support block 63 is disposed at the front end of the radial support rod 6, and the outer side surface of the support block 63 is an arc surface, and the outer side surface of each support block 63 can form a fitting circle to adapt to the shape of the annular elastic member 0.

[0025] The disc-shaped base plate 1 is provided with a central hole, and the pull rod 41 slides through the central hole. The front end of the pull rod 41 is fixed with a conjoined disc-shaped hinge support 3, and the rear end is fixed with a hand pull ring 4. The pull rod 41 is sleeved with a return spring 42, and the return spring 42 is located between the conjoined disc-shaped hinge support 3 and the disc-shaped base plate 1.

[0026] The conjoined disc hinge support 3 is composed of two coaxially arranged disc hinge supports 31 fixedly connected by a connecting sleeve 33. The disc hinge support 31 has a plurality of radial grooves 312 evenly distributed on its circumferential surface, and is also provided with an annular groove 311 communicating with the radial grooves 312. The radial grooves 312 correspond to the radial slide grooves 11 one by one, and a wire ring 32 is provided in the annular groove 311.

[0027] Two first connecting rods 5 of equal length are hinged to each radial support rod 6 through a first hinge support 61, and the other ends of the two first connecting rods 5 are respectively hinged to two disc-shaped hinge supports 31. Specifically, the other ends of the first connecting rods 5 are inserted into the radial groove 312 and connected to the wire ring 32. The conjoined disc-shaped hinge support 3, the radial support rod 6 and the two first connecting rods 5 form a parallelogram hinge structure.

[0028] The push assembly includes a discharge push rod 7 arranged in parallel on the outside of each radial support rod 6, and a guide ring 71 is slidably arranged on the radial support rod 6. The guide ring 71 is fixedly connected to the discharge push rod 7, so that the discharge push rod 7 can move axially along the radial support rod 6. A push block 72 is arranged at the front end of the discharge push rod 7, which is used to push the expanded annular elastic member 0 from the support block 63. The push block 72 initially maintains a certain distance from the support block 63. The rear end of the discharge push rod 7 is hinged with a second connecting rod 8 through a second hinge support 73.

[0029] The other end of the second connecting rod 8 is hinged on the third hinge support 9, and the third hinge support 9 is fixed in the corresponding radial slot 11, and the position is adjustable. Specifically, the third hinge support 9 is provided with an open slot 91, and a conical fastening screw 92 is provided in the open slot 91; when the fastening screw 92 is loosened, the open slot 91 contracts, and the third hinge support 9 can slide along the radial slot 11; when the fastening screw 92 is tightened, the open slot 91 is expanded, and the third hinge support 9 is clamped in the radial slot 11.

[0030] The method for using the radial expansion mechanism of the annular elastic member provided in the embodiment of the present invention is as follows:

[0031] 1) Holding the handle 21 , move the entire radial expansion mechanism to the annular elastic member 0 to be installed, and extend the circular support block 63 into the annular elastic member 0 .

[0032] 2) Lift the hand pull ring 4, move the pull rod 41 backward, pull the conjoined disc-shaped hinge support 3 toward the disc-shaped base plate 1, the first connecting rod 5 pushes each radial support rod 6 to expand radially outward, and the support block 63 gradually expands the annular elastic member 0, such as Figure 1 During the expansion of the annular elastic member 0, the unloading push rod 7 and the push block 72 move axially toward the annular elastic member 0 under the action of the second connecting rod 8. Since the push block 72 initially maintains a certain distance from the support block 63, the annular elastic member 0 will not fall out.

[0033] 3) Move the radial expansion mechanism with the annular elastic member 0 to the axial end of the annular elastic member 0 to be installed and align it, further lift the hand pull ring 4, the annular elastic member 0 further expands, and the push block 72 continues to move axially to push the annular elastic member 0 out of the support block 63 and insert it onto the installation shaft, as shown in FIG. Figure 2 As shown. During the radial expansion of the radial support rod 6, the return spring 42 is compressed and stores energy. When the hand pull ring 4 is released, under the action of the return spring 42, each part returns to the initial state.

[0034] In some embodiments, the radial expansion mechanism can be modified to be controlled by a robot. Specifically, the handle frame 2 is removed, the disc-shaped base plate 1 is connected to the robot arm, the hand pull ring 4 is removed, and the axial movement of the pull rod 41 is directly controlled by the motor drive. With such modification, the radial expansion mechanism can be applied to the installation production line.

Claims

1. A radial expansion mechanism of an annular elastic member, characterized in that: The invention comprises a disk-shaped base plate (1), a plurality of radial grooves (11) are evenly distributed along the annular direction on one side surface of the disk-shaped base plate (1), a radial support rod (6) is slidably arranged in each radial groove (11), and a support block (63) is arranged at the front end of the radial support rod (6); a pull rod (41) is passed through the center of the disk-shaped base plate (1), and the front end of the pull rod (41) is connected to each radial support rod (6) through a parallelogram hinge structure; when the pull rod (41) moves backward, each radial support rod (6) can synchronously expand radially outward, and a plurality of support blocks (63) open the annular elastic member; a reset spring (42) is sleeved on the pull rod (41) for resetting the pull rod (41).

2. The annular elastic member radial expansion mechanism according to claim 1, characterized in that: A coupled disc-shaped hinge support (3) is arranged at the front end of the pull rod (41), and the coupled disc-shaped hinge support (3) is composed of two coaxially arranged disc-shaped hinge supports (31) fixedly connected by a connecting sleeve (33); two first connecting rods (5) of equal length are hinged on each radial support rod (6), and the other ends of the two first connecting rods (5) are respectively hinged to the two disc-shaped hinge supports (31); the coupled disc-shaped hinge support (3), the radial support rod (6) and the two first connecting rods (5) form the parallelogram hinge structure; the reset spring (42) is located between the coupled disc-shaped hinge support (3) and the disc-shaped base plate (1).

3. The annular elastic member radial expansion mechanism according to claim 2, characterized in that: A plurality of radial grooves (312) are evenly distributed on the circumferential surface of the disc-shaped hinge support (31), and an annular groove (311) is also provided to communicate with the radial grooves (312), and the radial grooves (312) correspond to the radial sliding grooves (11) one by one; a steel wire ring (32) is provided in the annular groove (311), and the other end of the first connecting rod (5) is inserted into the radial groove (312) and connected to the steel wire ring (32).

4. The annular elastic member radial expansion mechanism according to claim 1, characterized in that: A handle frame (2) is fixed on the other side of the disc-shaped base plate (1), a grip (21) is provided on the handle frame (2), and a hand pull ring (4) is fixed at the rear end of the pull rod (41).

5. The annular elastic member radial expansion mechanism according to claim 1, characterized in that: The disc-shaped base plate (1) is mounted on a mechanical arm, and the axial movement of the pull rod (41) is controlled by a motor.

6. The annular elastic member radial expansion mechanism according to claim 1, characterized in that: The outer side surface of the support block (63) is an arc surface, and the outer side surface of each support block (63) can form a fitting circle to adapt to the shape of the annular elastic member.

7. The annular elastic member radial expansion mechanism according to claim 1, characterized in that: The cross section of the radial slide groove (11) is convex, and the rear end of the radial support rod (6) is provided with an adaptable slider (62), and the slider (62) is slidably arranged in the radial slide groove (11).

8. The annular elastic member radial expansion mechanism according to any one of claims 1 to 7, characterized in that: The push assembly also includes a discharge push rod (7) arranged in parallel on the outside of each radial support rod (6), and the discharge push rod (7) is slidably matched with the radial support rod (6) through a guide ring (71); a push block (72) is arranged at the front end of the discharge push rod (7) for pushing the spread annular elastic member from the support block (63), and the push block (72) initially maintains a certain distance from the support block (63); a second connecting rod (8) is hinged at the rear end of the discharge push rod (7), and the other end of the second connecting rod (8) is hinged on a third hinge support (9), and the third hinge support (9) is fixed in the corresponding radial slide groove (11).

9. The annular elastic member radial expansion mechanism according to claim 8, characterized in that: The position of the third hinge support (9) in the radial slide groove (11) is adjustable.

10. The annular elastic member radial expansion mechanism according to claim 9, characterized in that: The third hinge support (9) is provided with an open groove (91), and a conical fastening screw (92) is provided in the open groove (91); when the fastening screw (92) is loosened, the open groove (91) contracts, and the third hinge support (9) can slide along the radial sliding groove (11); when the fastening screw (92) is tightened, the open groove (91) is expanded, and the third hinge support (9) is clamped in the radial sliding groove (11).

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