Mechanical limiting device for realizing full-circle rotation of rotating mechanism

Abstract

The invention discloses a mechanical limiting device for realizing full-circle rotation of a rotating mechanism, and relates to the technical field of mechanical structures. The invention aims to solve the problem that the rotating stroke is influenced by the limiting of the existing rotating machinery. The device comprises a fixed seat, a limiting ball and a rotating shifting block, the rotating shifting block is fixedly connected to the movable end of a rotating mechanism, the fixed seat is fixedly connected to the fixed end of the rotating mechanism and arranged on the outer side of the rotating shifting block in the circumferential direction, the limiting ball is clamped in the fixed seat and moves in the fixed seat in the circumferential direction, an open groove is formed in the end of the fixed seat, and the limiting ball is clamped in the open groove. The outer side end of the rotating shifting block penetrates through the notch and is limited through the limiting ball. The limiting protection device is used for limiting protection of the limited rotating mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical structures, and in particular to a mechanical limiting device for realizing full-circle rotation of a rotating mechanism. Background Art

[0002] With the development of robotics and multi-axis CNC technology, cables need to pass through rotary joints to power the end actuators or transmit signals. Therefore, the rotary joints need to have mechanical limits in the direction of circular motion to prevent unlimited twisting from damaging the cables. However, due to volume limitations, the common ordinary limit block-type mechanical limits cause the travel of the rotary joint to be less than 360°, and it cannot rotate a full circle, let alone multiple circles, which reduces the performance of the rotary joint and, in turn, the quality of the robot or multi-axis CNC equipment.

[0003] For this purpose, a mechanical limit device invented for realizing full-circle rotation of a rotating mechanism has a large stroke limiting capacity. It can not only provide mechanical limit protection for rotating joints with a rotation stroke greater than 360°, but also has the characteristics of compact size, simple structure, and no power and torque loss. It can be arranged on the circumferential surface or end surface position according to the needs of the rotating joint. It also has good expansion characteristics and can realize multi-circle mechanical limiting as needed. Summary of the invention

[0004] In order to solve the problem that the existing rotation mechanism limit affects the rotation stroke, the present invention further proposes a mechanical limit device for realizing full-circle rotation of the rotating mechanism.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A mechanical limit device for realizing full-circle rotation of a rotating mechanism comprises a fixed seat, a limit ball and a rotating block, the rotating block is fixedly connected to the movable end of the rotating mechanism, the fixed seat is fixedly connected to the fixed end of the rotating mechanism and is arranged on the outside of the rotating block along the circumferential direction, the limit ball is clamped in the fixed seat and moves in the fixed seat along the circumferential direction, a slot is opened at the end of the fixed seat, the outer end of the rotating block passes through the slot and is limited by the limit ball.

[0007] Furthermore, a limiting groove is provided on the inner circumferential side wall of the fixing seat, the limiting ball is arranged in the limiting groove, the slot is arranged on the end slot wall of the limiting groove, and the rotating shift block passes through the limiting groove via the slot when rotating.

[0008] Furthermore, the position of the limiting ball changes along the length direction of the limiting groove when the rotating shifting block is shifted.

[0009] Furthermore, the rotational stroke of the rotating shift block is greater than 360°.

[0010] Furthermore, the rotation stroke of the rotating shift block is two or more circles.

[0011] Furthermore, the distance between the two side walls of the limiting groove is greater than the ball diameter of the limiting ball, the distance between the two sides of the limiting groove opening is less than the ball diameter of the limiting ball, and the groove depth of the limiting groove is greater than the ball diameter of the limiting ball.

[0012] Furthermore, the width of the slot is smaller than the ball diameter of the limiting ball and larger than the width of the rotating shift block.

[0013] Furthermore, the length of the rotating shift block arranged in the limiting groove is greater than half of the diameter of the limiting ball.

[0014] Furthermore, the rotation center of the rotating dial block is coaxially arranged with the rotation center of the rotating mechanism.

[0015] Furthermore, the fixing seat is in the shape of an arc, and the center of the fixing seat is coaxially arranged with the rotation center of the rotating shift block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention adopts a fixed base and a movable limiting ball component, which expands the limiting stroke of the mechanical limit and realizes a 360° full circle rotation of the joint.

[0018] Second, the present invention has a compact structure, small size, light weight, and no power consumption, has little impact on the size, weight, and power consumption of the rotary joint, and is easy to arrange and assemble.

[0019] 3. The principle of the present invention is clear and concise. It can realize full-circle limiting by using only three main parts, and it is easy to expand to realize multi-circle mechanical limiting.

[0020] Fourth, the present invention has the advantages of safety, reliability and low cost. The mechanical limiter can not only be used in the field of robot joints, but can also be extended to other application fields such as numerical control equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 yes Figure 1 AA view in the figure;

[0023] Figure 3 It is a schematic diagram of the limiting position of the limiting ball and the rotating shifting block when the rotating shifting block rotates clockwise in the present invention;

[0024] Figure 4 It is a schematic diagram of the limiting position of the limiting ball and the rotating shifting block when the rotating shifting block rotates counterclockwise in the present invention;

[0025] Figure 5 It is a schematic diagram of the overall structure of the present invention when the rotation stroke of the rotating shift block is two or more circles. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Specific implementation method 1: Combination Figures 1 to 4 The present embodiment is described. A mechanical limit device for realizing full-circle rotation of a rotating mechanism described in the present embodiment includes a fixed seat 1, a limit ball 2 and a rotating block 3. The rotating block 3 is fixedly connected to the movable end of the rotating mechanism. The fixed seat 1 is fixedly connected to the fixed end of the rotating mechanism and is arranged on the outer side of the rotating block 3 along the circumferential direction. The limit ball 2 is clamped in the fixed seat 1 and moves in the circumferential direction in the fixed seat 1. A slot 1-1 is opened at the end of the fixed seat 1. The outer end of the rotating block 3 passes through the slot 1-1 and is limited by the limit ball 2.

[0028] The limiting ball 2 can be placed in the fixing seat 1 and will not fall off, and can change position when the rotating shifting block 3 is turned.

[0029] The fixing seat 1, the limiting ball 2 and the rotating block 3 can change the material, diameter, thickness and other parameters to achieve mechanical limiting of different torques. Therefore, the mechanical limiting of the present invention can withstand different torques and rotation speeds.

[0030] The fixing seat 1, the limiting ball 2 and the rotating block 3 can change the circumferential length to achieve mechanical limiting of 2 or even multiple turns. Therefore, the mechanical limiting of the present invention can achieve multiple turns of mechanical limiting by changing the length and shape of the fixing seat.

[0031] The fixing seat 1, the limiting ball 2 and the rotating block 3 can be installed in different positions and can be placed on the circumferential surface and the end surface of the rotating mechanism. Therefore, the mechanical limiting of the present invention can be placed on the circumferential surface or the end surface of the rotating joint.

[0032] The limiting ball 2 is a steel ball.

[0033] The rotating shift block 3 comprises a connecting sleeve and a shift block. The connecting sleeve is fixedly connected to the movable end of the rotating mechanism. The shift block is vertically fixedly connected to the outer side of the connecting sleeve. The limit ball 2 is shifted by the shift block to make it move.

[0034] The mechanism for realizing full-circle mechanical limiting by utilizing a constrained limiting ball proposed by the present invention has the characteristics of simple and ingenious structure, small size, light weight and no energy consumption.

[0035] A semi-freely movable limiting ball 2 is used between the fixed seat 1 and the rotating block 3. The movable area of ​​the limiting ball 2 is larger than the length of the rotating block 3, and the mechanical limiting position is changed, so that the rotating block 3 can make a full circle rotation of not less than 360°. The problem of the existing non-multi-turn rotating mechanism that the stroke is shortened due to the mechanical limit and the rotation cannot be made in a full circle is solved.

[0036] Specific implementation method 2: Combination Figures 1 to 4 This embodiment is described. In this embodiment, a limiting groove 1-2 is provided on the inner circumferential side wall of the fixing seat 1. The limiting ball 2 is arranged in the limiting groove 1-2. The slot 1-1 is arranged on the end slot wall of the limiting groove 1-2. When the rotating shift block 3 rotates, it passes through the limiting groove 1-2 via the slot 1-1. The undisclosed technical features in this embodiment are the same as those in the first embodiment. This design is used to realize the clamping of the limiting ball 2 in the limiting groove 1-2 of the fixing seat 1.

[0037] Specific implementation method three: Combination Figures 1 to 4 To explain this embodiment, the position of the limiting ball 2 in this embodiment changes along the length direction of the limiting groove 1-2 under the movement of the rotating shift block 3. The undisclosed technical features in this embodiment are the same as those in the second embodiment.

[0038] Specific implementation method four: Combination Figures 1 to 4 To illustrate this embodiment, the rotation stroke of the rotating block 3 in this embodiment is greater than 360°. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0039] Specific implementation method five: Combination Figures 1 to 4 This embodiment is described, in which the rotation stroke of the rotating block 3 is two or more circles. The undisclosed technical features in this embodiment are the same as those in the fourth embodiment.

[0040] When the rotation stroke of the rotating block 3 is two or more circles, Figure 5 As shown, the rotating block 3 is circumferentially fixed on the rotating shaft 3-1 by a key, and the movable end of the rotating mechanism drives the rotating block 3 to rotate through the rotating shaft 3-1, and the rotating block 3 can move axially on the rotating shaft 3-1. A spiral groove is provided on the outer side of the rotating block 3 in the axial direction, and the limiting groove 1-2 on the fixed seat 1 cooperates with the spiral groove to constrain the steel ball 2 to prevent the steel ball from falling out. The rotation limit is realized by the end of the spiral groove, and the multi-turn mechanical limit of the device is realized according to the setting of the number of turns of the spiral groove.

[0041] Specific implementation method six: Combination Figures 1 to 4This embodiment is described. The distance between the two side walls of the limiting groove 1-2 described in this embodiment is greater than the ball diameter of the limiting ball 2, the distance between the two sides of the notch of the limiting groove 1-2 is less than the ball diameter of the limiting ball 2, and the groove depth of the limiting groove 1-2 is greater than the ball diameter of the limiting ball 2. The undisclosed technical features in this embodiment are the same as those in the second embodiment. Such a design allows the limiting ball 2 to be placed in the fixing seat 1 without falling off, and to change position when the rotating dial block 3 is turned.

[0042] Specific implementation method seven: Combination Figures 1 to 4 To explain this embodiment, the width of the slot 1-1 in this embodiment is smaller than the ball diameter of the limiting ball 2 and larger than the width of the rotating block 3. The undisclosed technical features in this embodiment are the same as those in the sixth embodiment.

[0043] Specific implementation method eight: Combination Figures 1 to 4 In this embodiment, the length of the rotating block 3 in the limiting groove 1-2 is greater than half the diameter of the limiting ball 2. The undisclosed technical features in this embodiment are the same as those in the specific embodiment 7. Such a design allows the limiting ball 2 to move by rotating the rotating block 3.

[0044] Specific implementation method nine: Combination Figures 1 to 4 To explain this embodiment, the rotation center of the rotating block 3 in this embodiment is coaxially arranged with the rotation center of the rotating mechanism. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0045] Specific implementation method ten: Combination Figures 1 to 4 To explain this embodiment, the shape of the fixing seat 1 in this embodiment is an arc shape, and the center of the fixing seat 1 is coaxially arranged with the rotation center of the rotating shift block 3. The undisclosed technical features in this embodiment are the same as those in the ninth embodiment.

[0046] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A mechanical limit device for realizing full-circle rotation of a rotating mechanism, characterized in that: The invention comprises a fixed seat (1), a limiting ball (2) and a rotating block (3); the rotating block (3) is fixedly connected to the movable end of the rotating mechanism; the fixed seat (1) is fixedly connected to the fixed end of the rotating mechanism and is arranged outside the rotating block (3) in the circumferential direction; the limiting ball (2) is clamped in the fixed seat (1) and moves in the fixed seat (1) in the circumferential direction; a slot (1-1) is provided at the end of the fixed seat (1); the outer end of the rotating block (3) passes through the slot (1-1) and is limited by the limiting ball (2).

2. A mechanical limit device for achieving full-circle rotation of a rotating mechanism according to claim 1, characterized in that: A limiting groove (1-2) is provided on the inner circumferential side wall of the fixing seat (1), the limiting ball (2) is arranged in the limiting groove (1-2), the slot (1-1) is arranged on the end slot wall of the limiting groove (1-2), and the rotating shift block (3) passes through the limiting groove (1-2) via the slot (1-1) when rotating.

3. A mechanical limit device for achieving full-circle rotation of a rotating mechanism according to claim 2, characterized in that: The position of the limiting ball (2) changes along the length direction of the limiting groove (1-2) when the rotating shifting block (3) is shifted.

4. A mechanical limit device for achieving full-circle rotation of a rotating mechanism according to claim 1, characterized in that: The rotation stroke of the rotating shift block (3) is greater than 360°.

5. A mechanical limit device for achieving full-circle rotation of a rotating mechanism according to claim 4, characterized in that: The rotation stroke of the rotating shift block (3) is two or more circles.

6. A mechanical limit device for achieving full-circle rotation of a rotating mechanism according to claim 2, characterized in that: The distance between the two side walls of the limiting groove (1-2) is greater than the ball diameter of the limiting ball (2), the distance between the two sides of the groove opening of the limiting groove (1-2) is less than the ball diameter of the limiting ball (2), and the groove depth of the limiting groove (1-2) is greater than the ball diameter of the limiting ball (2).

7. A mechanical limit device for achieving full-circle rotation of a rotating mechanism according to claim 6, characterized in that: The slot width of the slot (1-1) is smaller than the ball diameter of the limiting ball (2) and larger than the width of the rotating shift block (3).

8. A mechanical limit device for achieving full-circle rotation of a rotating mechanism according to claim 7, characterized in that: The length of the rotating shift block (3) arranged in the limiting groove (1-2) is greater than half the diameter of the limiting ball (2).

9. A mechanical limit device for achieving full-circle rotation of a rotating mechanism according to claim 1, characterized in that: The rotation center of the rotating dial block (3) is coaxially arranged with the rotation center of the rotating mechanism.

10. A mechanical limit device for achieving full-circle rotation of a rotating mechanism according to claim 9, characterized in that: The fixing seat (1) is in the shape of an arc, and the center of the fixing seat (1) is coaxially arranged with the rotation center of the rotating shift block (3).

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