Pressure-adjustable limiting pull rod

Abstract

The utility model discloses an adjustable pressure type limiting pull rod which is characterized in that a second movable arm is movably connected with a fixed arm through a third rotating shaft, the second movable arm is movably connected with a first movable arm through a second rotating shaft, the side surface of the first movable arm is rotationally connected with a pull rod through a first rotating shaft, and a sliding groove is formed in the side surface of the pull rod. A first limiting point is arranged in the sliding groove, a second limiting point is arranged in the sliding groove, a positioning hole is formed in the second movable arm, an adjusting nut is connected to the interior of the positioning hole in a threaded mode, a spring is movably connected to the interior of the positioning hole, a supporting block is fixedly connected to the rear end of the spring, and a ball socket is arranged on the face, away from the spring, of the supporting block. By means of the device, the precise requirements for limiting precision and opening force under different working conditions can be met, and the safety and stability of equipment are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of limit tie rods, and particularly relates to an adjustable pressure type limit tie rod. Background Art

[0002] In many industrial fields, the safe operation of mechanical equipment is of crucial importance. Traditional limit devices often have problems such as insufficient precision and slow response, and cannot effectively prevent equipment damage or safety accidents caused by excessive movement or incorrect operation of the equipment. Therefore, a limit device that can accurately control the movement range and brake in a timely manner when necessary is needed. When the device moves to a certain position, for safety reasons, it can be limited at a specific position. When the opening force is increased to a certain extent, the device can continue to move. Content of the Utility Model

[0003] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art, and provide an adjustable pressure type limit tie rod. Through the interaction between the chute and the limit steel ball, accurate limit of the rotation of the movable arm is achieved. At the same time, the adjusting nut adjusts the pre-tightening force of the spring, and can flexibly control the opening force required by the limit steel ball in the chute, which is beneficial to meeting the precise requirements for limit precision and opening force under different working conditions. By setting a limit point one and a limit point two in the chute on the tie rod, the rolling track of the limit steel ball in the chute can be restricted and the required opening force can be accurately controlled, preventing equipment damage or safety accidents caused by excessive external force or improper operation, and being beneficial to enhancing the safety and stability of the equipment.

[0004] The utility model also provides an adjustable pressure type limit tie rod with the above features, including: a movable arm two, the movable arm two is movably connected to a fixed arm through a rotating shaft three, the movable arm two is movably connected to a movable arm one through a rotating shaft two, the side surface of the movable arm one is rotatably connected to a tie rod through a rotating shaft one, a chute is arranged on the side surface of the tie rod, a limit point one is arranged inside the chute, a limit point two is arranged inside the chute, a positioning hole is arranged inside the movable arm two, an adjusting nut is threadedly connected inside the positioning hole, a spring is movably connected inside the positioning hole, a support block is fixedly connected to the rear end of the spring, a ball socket is arranged on the surface of the support block away from the spring, and a limit steel ball is movably connected inside the ball socket. Through the above device, it is beneficial to meet the precise requirements for limit precision and opening force under different working conditions, and enhance the safety and stability of the equipment.

[0005] According to the adjustable pressure type limit tie rod of the utility model, the other end of the tie rod is movably connected to the fixed arm, and the tie rod is located inside the movable arm two. Through the above device, it is beneficial to improve the stability.

[0006] An adjustable pressure limit pull rod according to the present utility model, wherein the chute covers the outlet of the positioning hole, and the adjusting nut covers the inlet of the positioning hole. Through the above device, it is beneficial to improve the positioning accuracy and stability.

[0007] An adjustable pressure limit pull rod according to the present utility model, wherein the spring is located inside the adjusting nut, and both the spring and the support block are located inside the positioning hole. Through the above device, it is beneficial to provide an appropriate initial tension for the device, thereby ensuring the tight connection and stable operation between components.

[0008] An adjustable pressure limit pull rod according to the present utility model, wherein the limit steel ball is located inside the chute, and the movable arm one is located on the right side of the pull rod. Through the above device, it is beneficial to limit the movement trajectory of the limit steel ball.

[0009] An adjustable pressure limit pull rod according to the present utility model, wherein the rotating shaft three is located on the left side of the movable arm two, and the rotating shaft two is located on the right side of the movable arm two. Through the above device, it is beneficial to ensure the compactness of the device structure, thereby improving the overall performance of the device. Beneficial effects

[0010] 1. Compared with the prior art, for this adjustable pressure limit pull rod, through the interaction between the chute and the limit steel ball, precise limit of the rotation of the movable arm is achieved. At the same time, the adjusting nut adjusts the pre-tightening force of the spring, and can flexibly control the opening force required by the limit steel ball in the chute, which is beneficial to meeting the precise requirements for the limit accuracy and opening force under different working conditions.

[0011] 2. Compared with the prior art, for this adjustable pressure limit pull rod, by setting the limit point one and the limit point two in the chute on the pull rod, the rolling trajectory of the limit steel ball in the chute can be restricted and the required opening force can be precisely controlled, preventing equipment damage or safety accidents caused by excessive external force or improper operation, which is beneficial to enhancing the safety and stability of the equipment. Description of the drawings

[0012] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0013] Figure 1 It is a three-dimensional structure diagram of an adjustable pressure limit pull rod of the present utility model;

[0014] Figure 2 It is a cross-sectional structure diagram of an adjustable pressure limit pull rod of the present utility model;

[0015] Figure 3 It is an enlarged view of part B in an adjustable pressure limit pull rod of the present utility model Figure 2 in the present utility model;

[0016] Figure 4 This is a three-dimensional structure diagram of the pull rod of an adjustable pressure type limit pull rod of the present utility model.

[0017] Legend description:

[0018] 1. Pull rod; 2. Limit steel ball; 3. Ball socket; 4. Spring; 5. Adjusting nut; 6. First movable arm; 7. First rotating shaft; 8. Second rotating shaft; 9. Second movable arm; 10. Fixed arm; 11. Third rotating shaft; 12. Positioning hole; 13. Support block; 14. Chute; 15. First limit point; 16. Second limit point. Specific implementation manner

[0019] This part will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the drawings. The role of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it cannot be understood as a limitation on the protection scope of the present utility model.

[0020] Referring to Figures 1-4 , an adjustable pressure type limit pull rod in an embodiment of the present utility model includes: a second movable arm 9, as a component in the pull rod mechanism, the second movable arm 9 is movably connected to a fixed arm 10 through a third rotating shaft 11, and is used as the fixed part of the entire pull rod mechanism. The second movable arm 9 is movably connected to a first movable arm 6 through a second rotating shaft 8, and is used to drive and affect the position and state of the pull rod 1. The side surface of the first movable arm 6 is rotatably connected to the pull rod 1 through a first rotating shaft 7, and is used as a component for transmitting force and motion. The first movable arm 6 is located on the right side of the pull rod 1. The other end of the pull rod 1 is movably connected to the fixed arm 10. The pull rod 1 is located inside the second movable arm 9. A chute 14 is provided on the side surface of the pull rod 1, and is used to accommodate and guide the movement of the limit steel ball 2. A first limit point 15 is provided inside the chute 14, as a specific position inside the chute 14, and is used to limit the movement of the limit steel ball 2. A second limit point 16 is provided inside the chute 14, as a specific position inside the chute 14, and is used to limit the movement of the limit steel ball 2.

[0021] The interior of the second movable arm 9 is provided with a positioning hole 12 for installing and fixing components such as a spring 4 and a support block 13. A chute 14 covers the outlet of the positioning hole 12 to ensure the moving position of the limiting steel ball 2. An adjusting nut 5 is threadedly connected inside the positioning hole 12 to adjust the pre-tightening force of the spring 4. The adjusting nut 5 covers the inlet of the positioning hole 12. A spring 4 is movably connected inside the positioning hole 12 to apply pressure to the limiting steel ball 2, thereby affecting the rotation resistance and limiting effect of the movable arm. The rear end of the spring 4 is fixedly connected to a support block 13 for supporting and fixing the spring 4 and installing the limiting steel ball 2. The spring 4 is located inside the adjusting nut 5, and both the spring 4 and the support block 13 are located inside the positioning hole 12. A ball socket 3 is provided on one side of the support block 13 away from the spring 4, which is a groove provided on the support block 13 for accommodating and fixing the limiting steel ball 2. A limiting steel ball 2 is movably connected inside the ball socket 3 for cooperating with the limiting point to limit the pull rod 1. The limiting steel ball 2 is located inside the chute 14. The third rotating shaft 11 is located on the left side of the second movable arm 9, and the second rotating shaft 8 is located on the right side of the second movable arm 9.

[0022] Working principle: When no external force is applied, the first movable arm 6 and the second movable arm 9 are in a relatively static state. The pull rod 1 is located inside the second movable arm 9, and the chute 14 thereon maintains a certain contact relationship with the limiting steel ball 2. The spring 4, through the pre-tightening force of the adjusting nut 5, presses the limiting steel ball 2 against a certain position in the chute 14. When the first movable arm 6 and the second movable arm 9 start to rotate relative to each other, the pull rod 1 moves accordingly. The movement of the pull rod 1 causes a change in the interaction between the chute 14 and the limiting steel ball 2. The depth and angle design of the chute 14 determine the movement trajectory of the limiting steel ball 2 in the chute 14 and the required opening force. As the movable arm rotates, the limiting steel ball 2 rolls in the chute 14. When the movement of the pull rod 1 causes the limiting steel ball 2 to move to the first limiting point 15 on the chute 14, due to the blocking effect of the limiting steel ball 2, the pull rod 1 cannot continue to move in the current direction. At this time, the further rotation of the first movable arm 6 is restricted, and the device is in a fixed state. When the external force increases to overcome the pressure of the limiting steel ball 2 at the first limiting point 15 in the chute 14, the first movable arm 6 and the second movable arm 9 can continue to rotate. The increase in the external force pushes the limiting steel ball 2 to continue rolling in the chute 14 until it reaches the second limiting point 16 or the first movable arm 6 reaches the maximum rotation angle. By adjusting the position of the adjusting nut 5 in the positioning hole 12, the pre-tightening force of the spring 4 can be adjusted, thereby changing the opening force required for the limiting steel ball 2 in the chute 14. The fine-tuning function of the adjusting nut 5 enables the limiting pull rod to adapt to different working conditions and requirements.

[0023] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which the present invention pertains, various changes can be made without departing from the gist of the present invention.

Claims

1. An adjustable pressure limit pull rod, characterized in that: include: A movable arm 2 (9), wherein the movable arm 2 (9) is movably connected to a fixed arm (10) via a rotating shaft 3 (11), the movable arm 2 (9) is movably connected to a movable arm 1 (6) via a rotating shaft 2 (8), the side surface of the movable arm 1 (6) is rotatably connected to a pull rod (1) via a rotating shaft 1 (7), the side surface of the pull rod (1) is provided with a slide groove (14), a limited position 1 (15) is provided inside the slide groove (14), a limited position 2 (16) is provided inside the slide groove (14), a positioning hole (12) is provided inside the positioning hole (12), an adjusting nut (5) is threadedly connected inside the positioning hole (12), a spring (4) is movably connected inside the positioning hole (12), a rear end of the spring (4) is fixedly connected to a support block (13), a ball socket (3) is provided on a side of the support block (13) away from the spring (4), and a limited position steel ball (2) is movably connected inside the ball socket (3).

2. The adjustable pressure-type limit pull rod according to claim 1, characterized in that: The other end of the pull rod (1) is movably connected to the fixed arm (10), and the pull rod (1) is located inside the second movable arm (9).

3. The adjustable pressure-type limit pull rod according to claim 1, characterized in that: The slide groove (14) covers the outlet of the positioning hole (12), and the adjustment nut (5) covers the inlet of the positioning hole (12).

4. The adjustable pressure-type limit pull rod according to claim 1, characterized in that: The spring (4) is located inside the adjusting nut (5), and the spring (4) and the supporting block (13) are both located inside the positioning hole (12).

5. The adjustable pressure-type limit pull rod according to claim 1, characterized in that: The limiting steel ball (2) is located inside the slide groove (14), and the movable arm 1 (6) is located on the right side of the pull rod (1).

6. The adjustable pressure-type limit pull rod according to claim 1, characterized in that: The rotating shaft three (11) is located on the left side of the movable arm two (9), and the rotating shaft two (8) is located on the right side of the movable arm two (9).

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