Rotary limiting device

Abstract

The invention relates to the technical field of safety devices, in particular to a rotation limiting device which comprises a limiting frame, the interior of the limiting frame is of a hollow structure, a limiter connected with a rotating shaft is arranged at the center of the interior of the limiting frame, two driving parts are symmetrically arranged on the outer wall of the limiting frame, and the two driving parts are parallel to the limiter. Positioning pins are correspondingly arranged above the two driving parts respectively, the two positioning pins are symmetrically arranged on the two sides of the limiting device, the positioning pins penetrate through the limiting frame and can move in the height direction of the limiting frame under the driving of the driving parts, and two check blocks are symmetrically arranged at the bottom of the limiting device and correspond to the positioning pins respectively; when the positioning pin moves to the lowest point in the height direction of the limiting frame, the two ends of the limiting stopper are blocked by the positioning pin to keep the vertical state, the rotating shaft does not rotate, and when the positioning pin moves to the highest point, the rotating shaft rotates to drive the limiting stopper to rotate towards one side of the moving positioning pin until the limiting stopper abuts against the check block, and the rotating stroke of the rotating shaft is limited.

Description

Technical Field

[0001] The present invention relates to the technical field of safety devices, and in particular to a rotation limiting device. Background Art

[0002] A limiter is a mechanical device, usually used in mechanical or electrical systems, to limit the range of motion of the device. Its main purpose is to prevent damage to components due to exceeding the normal operating range, or to prevent potential danger to operators or the equipment itself due to excessive movement of components.

[0003] At present, when repairing large and medium-sized molds and heavy steel coils and moving flat pallets, it is necessary to meet the engineering turning requirements of different workpiece materials, provide process transportation safely, smoothly and effectively, and achieve the operational goal of converting goods from horizontal to vertical or from vertical to horizontal. However, due to excessive movement during the turning process of the workpiece, the workpiece is damaged, endangering the personal safety of the operator. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a rotation limiting device which has a simple structure and can accurately control the rotation stroke.

[0005] The present invention provides a rotation limit device, comprising a limit frame, the interior of the limit frame is a hollow structure, a limiter is arranged at the center position of the interior of the limit frame, the limiter is connected to the rotating shaft, two driving members are symmetrically arranged on the outer wall of the limit frame, the two driving members are arranged in parallel with the limiter, positioning pins are respectively arranged above the two driving members, and the two positioning pins are symmetrically arranged on both sides of the limiter, the positioning pins penetrate the limit frame and can move along the height direction of the limit frame under the drive of the driving member, and two stoppers are symmetrically arranged at the bottom of the limiter, and the two stoppers are respectively arranged corresponding to the positioning pins;

[0006] Among them, when the positioning pin moves to the lowest point along the height direction of the limit frame, the two ends of the limiter are blocked by the positioning pin to maintain a vertical state, and the rotating shaft does not rotate. When the positioning pin moves to the highest point along the height direction of the limit frame, the rotating shaft rotates to drive the limiter to rotate toward the side of the moving positioning pin until it abuts against the stop block.

[0007] Optionally, both of the two stoppers are telescopic structures, and both of the two stoppers are provided with self-locking parts.

[0008] Optionally, the height of the stopper is smaller than the distance between the top surface of the limiter and the bottom surface inside the limit frame.

[0009] Optionally, a top surface of the stopper and a side facing the limiter are both provided with flexible parts.

[0010] Optionally, the distance between opposite sides of the two positioning pins is equal to the width of the limiter.

[0011] Optionally, the limiting frame has a first slot on one side close to the driving member, the first slot is arranged corresponding to the limiter, and the limiting frame has second slots on two opposite sides in the width direction.

[0012] Optionally, a slide groove is provided on the limiting frame at a position corresponding to the positioning pin, and a width of the slide groove is smaller than a width of the positioning pin in the limiting frame.

[0013] Optionally, the limiter is provided with a mounting hole suitable for connecting with the rotating shaft.

[0014] Optionally, the driving member is an oil cylinder, and the driving member includes a cylinder barrel and a telescopic rod, the cylinder barrel is connected to the limit frame through a mounting plate, and the telescopic rod passes through the positioning pin.

[0015] Compared with the prior art, the technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0016] The present embodiment provides a rotation limit device, which provides positioning pins capable of moving along the height direction of the limit frame on both sides of the limiter, so that the limiter can maintain a vertical state or a rotational state, and provides a stop block inside the limit frame so that the limiter can abut against the stop block after rotation, thereby limiting the rotational travel of the rotating shaft. The limit device has a simple structure and is easy to operate, which improves the accuracy of the limit and prevents damage to the components connected to the rotating shaft due to exceeding the normal operating range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 It is a structural schematic diagram of the rotation limiting device according to an embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the limiter rotating in the limit frame according to an embodiment of the present invention;

[0021] Figure 3It is a structural schematic diagram of the rotation limiting device when the limiter is not installed according to an embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the limiter described in an embodiment of the present invention.

[0023] Among them, 1. limit frame; 101. first slot; 102. second slot; 103. slide slot; 2. limiter; 201. mounting hole; 3. drive member; 301. cylinder; 302. telescopic rod; 4. positioning pin; 5. stopper; 6. mounting plate. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Reference Figures 1 to 4 As shown, this embodiment provides a rotation limit device, including a limit frame 1, the interior of the limit frame 1 is a hollow structure, a limiter 2 is arranged at the center position of the interior of the limit frame 1, the limiter 2 is connected to the rotating shaft, and two driving members 3 are symmetrically arranged on the outer wall of the limit frame 1, the two driving members 3 are arranged parallel to the limiter 2, and positioning pins 4 are respectively arranged above the two driving members 3. The positioning pins 4 penetrate the limit frame 1 and can move along the height direction of the limit frame 1 under the drive of the driving member 3. Two stoppers 5 are symmetrically arranged at the bottom of the limiter 2, and the two stoppers 5 are respectively arranged corresponding to the positioning pins 4. When the positioning pins 4 move to the lowest point along the height direction of the limit frame 1, the two ends of the limiter 2 are blocked by the positioning pins 4 to maintain a vertical state, and the rotating shaft does not rotate. When the positioning pins 4 move to the highest point along the height direction of the limit frame 1, the rotating shaft rotates to drive the limiter 2 to rotate toward one side of the moving positioning pins 4 until it abuts against the stopper 5.

[0027] Among them, the limit frame 1 is provided with a double-layer shelf plate, and the limiter 2 is arranged between the double-layer shelf plates and arranged along the center line of the shelf plates. Figure 1 and Figure 4As shown, the rotating shaft passes through the first shelf plate of the limit frame 1 and is connected to the limiter 2. When the rotating shaft rotates, it drives the limiter 2 to rotate. Two driving members 3 are arranged on the second shelf plate of the limit frame 1. The two driving members 3 are symmetrically arranged and arranged in parallel with the limiter 2. Positioning pins 4 are arranged above the two driving members 3. The driving members 3 can drive the positioning pins 4 to move along the height direction of the limit frame 1. The positioning pins 4 penetrate the limit frame 1, and the two positioning pins 4 are arranged on both sides of the limiter 2. When the two driving members 3 drive the two positioning pins 4 to move along the height direction of the limit frame 1 to the lowest point, refer to Figure 1 As shown, the two positioning pins 4 have a blocking effect on the limiter 2 located between the two positioning pins 4, so that the limiter 2 is always in a vertical state, that is, the shaft cannot rotate. When one of the driving members 3 drives the corresponding positioning pin 4 to move to the highest point along the height direction of the limit frame 1, refer to Figure 2 As shown, the shaft can rotate, thereby driving the limiter 2 to rotate toward one side of the moving positioning pin 4 until the positioning pin 4 abuts against the stopper 5. That is to say, this rotation limit device is provided with a positioning pin 4 that can move along the height direction of the limit frame 1, and a limiter 2 placed between the two positioning pins 4, so that the two positioning pins 4 have a blocking or releasing effect on the limiter 2, so that the shaft can remain in a stationary state or a rotating state, and the rotation angle of the shaft is limited to avoid damage to the components connected to the shaft due to exceeding the normal operating range.

[0028] Furthermore, both of the two stoppers 5 are telescopic structures, and both of the two stoppers 5 are provided with self-locking parts. Specifically, the two stoppers 5 can perform telescopic movement along the height direction of the limit frame 1, and the distance between the stoppers 5 and the stopper 2 is changed by adjusting the height of the stoppers 5, and the stopper 2 stops rotating when it abuts against the stoppers 5, so that the rotation angle of the stopper 2 can change with the change of the height of the stoppers 5. At the same time, the stoppers 5 are provided with self-locking parts, so that the stoppers 5 can remain stable at any height, so that the limit device can adjust the limit angle range as needed, thereby improving the applicability of the limit device.

[0029] Of course, the stopper 5 can also be set to a fixed height, specifically, the top surface of the stopper 5 is flush with the bottom surface of the limiter 2, so that the limiter 2 abuts against the stopper 5 when it rotates 90° clockwise or 90° counterclockwise.

[0030] Based on the above-mentioned stopper 5, the height of the stopper 5 is smaller than the distance between the top surface of the limiter 2 and the bottom surface inside the limiter frame 1, that is, the top surface of the stopper 5 does not exceed the top surface of the limiter 2, so that the limiter 2 can rotate.

[0031] In order to improve the service life of the limit device, flexible parts are provided on the top surface of the block 5 and the side facing the limiter 2. The flexible parts can prevent the block 5 from colliding with the limiter 2 when in contact. The flexible parts can be made of silicone or other materials with elastic properties, which are not limited here.

[0032] Reference Figure 3 As shown, in order to achieve the blocking effect of the two positioning pins 4 on the limiter 2 and ensure that the limiter 2 is in a vertical state so that the shaft does not rotate, the distance between the opposite sides of the two positioning pins 4 is equal to the width of the limiter 2.

[0033] In some embodiments, the side of the limit frame 1 close to the driving member 3 has a first slot 101, the first slot 101 is arranged corresponding to the limiter 2, and the two opposite sides in the width direction of the limit frame 1 have second slots 102. Specifically, the first slot 101 and the second slot 102 can both serve as visual windows, so that the operator can observe the working status of the limiter 2.

[0034] Of course, in order to realize the movement of the positioning pin 4 on the limiting frame 1, a slide groove 103 is provided at the position corresponding to the positioning pin 4 on the limiting frame 1, and the width of the slide groove 103 is smaller than the width of the positioning pin 4 in the limiting frame 1. Specifically, the positioning pin 4 can pass through the double-layer limiting frame 1, and the width of the parts extending from the two slide grooves 103 at both ends of the positioning pin 4 is smaller than the width of the positioning pin 4 placed between the limiting frames 1, so that the positioning pin 4 will not slip out of the slide groove 103, thereby ensuring that the positioning pin 4 can move stably along the slide groove 103.

[0035] Reference Figure 4 As shown, the limiter 2 is provided with a mounting hole 201 suitable for connecting with the rotating shaft. Specifically, a through hole is provided at the position of the first shelf plate of the limiter frame 1 corresponding to the mounting hole 201. Both the through hole and the mounting hole 201 are suitable for the rotating shaft to pass through, so that the limiter 2 can be sleeved on the rotating shaft.

[0036] In other embodiments, the driving member 3 is a cylinder, and the driving member 3 includes a cylinder barrel 301 and a telescopic rod 302. The cylinder barrel 301 is connected to the limit frame 1 through the mounting plate 6, and the telescopic rod 302 passes through the positioning pin 4. Specifically, the mounting plate 6 is an L-shaped connecting plate, one side of which is connected to the limit frame 1 in the vertical direction, and one side of which is connected to the top surface of the cylinder barrel 301 in the horizontal direction, thereby realizing the connection between the driving member 3 and the limit frame 1, and the telescopic rod 302 is connected to the positioning pin 4, thereby driving the positioning pin 4 to move along the height direction of the limit frame 1.

[0037] In specific implementation, it can be seen that the positioning pin 4 is placed at the bottom of the slide groove 103 as the initial state. At this time, the positioning pin 4 moves to the lowest point, so that the positioning pins 4 on both sides of the limiter 2 have a blocking effect on it, so that the limiter 2 is always in a vertical state and the shaft cannot rotate. When the shaft needs to rotate to one side, one of the driving members 3 is driven to drive the corresponding positioning pin 4 to move along the slide groove 103 until the positioning pin 4 moves to the highest point. Driven by the shaft, the limiter 2 rotates toward the side of the moving positioning pin 4 until the limiter 2 abuts against the block 5, and the shaft cannot continue to rotate, thereby realizing the limitation of the rotation angle of the shaft to avoid damage to the components connected to the shaft due to exceeding the normal operating range.

[0038] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A rotation limit device, It is characterized in that The invention comprises a limit frame (1), the interior of the limit frame (1) is a hollow structure, a limiter (2) is arranged at the center position of the interior of the limit frame (1), the limiter (2) is connected to the rotating shaft, two driving members (3) are symmetrically arranged on the outer wall of the limit frame (1), the two driving members (3) are arranged in parallel with the limiter (2), positioning pins (4) are respectively arranged above the two driving members (3), and the two positioning pins (4) are symmetrically arranged on both sides of the limiter (2), the positioning pins (4) penetrate the limit frame (1) and can move along the height direction of the limit frame (1) under the drive of the driving member (3), and two stoppers (5) are symmetrically arranged at the bottom of the limiter (2), and the two stoppers (5) are respectively arranged corresponding to the positioning pins (4); When the positioning pin (4) moves to the lowest point along the height direction of the limiting frame (1), the two ends of the limiter (2) are blocked by the positioning pin (4) to maintain a vertical state, and the rotating shaft does not rotate; when the positioning pin (4) moves to the highest point along the height direction of the limiting frame (1), the rotating shaft rotates to drive the limiter (2) to rotate toward the side of the moving positioning pin (4) until it abuts against the stopper (5).

2. The rotation limiting device according to claim 1, It is characterized in that The two stoppers (5) are both telescopic structures, and the two stoppers (5) are both provided with self-locking parts.

3. The rotation limiting device according to any one of claims 1 and 2, It is characterized in that The height of the stopper (5) is smaller than the distance between the top surface of the stopper (2) and the bottom surface inside the stop frame (1).

4. The rotation limiting device according to claim 1, It is characterized in that The top surface of the stopper (5) and the side facing the stopper (2) are both provided with flexible parts.

5. The rotation limiting device according to claim 1, It is characterized in that The distance between the opposite sides of the two positioning pins (4) is equal to the width of the stopper (2).

6. The rotation limiting device according to claim 1, It is characterized in that The limiting frame (1) has a first slot (101) on one side close to the driving member (3), the first slot (101) being arranged corresponding to the limiter (2), and the limiting frame (1) has second slots (102) on both sides opposite to each other in the width direction.

7. The rotation limiting device according to claim 1, It is characterized in that A slide groove (103) is provided on the limiting frame (1) at a position corresponding to the positioning pin (4), and the width of the slide groove (103) is smaller than the width of the positioning pin (4) located inside the limiting frame (1).

8. The rotation limiting device according to claim 1, It is characterized in that The stopper (2) is provided with a mounting hole (201) suitable for connecting with the rotating shaft.

9. The rotation limiting device according to claim 1, It is characterized in that The driving member (3) is an oil cylinder, and the driving member (3) comprises a cylinder barrel (301) and a telescopic rod (302). The cylinder barrel (301) is connected to the limiting frame (1) via a mounting plate (6), and the telescopic rod (302) passes through the positioning pin (4).

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