Angular spring positioning pin with compensation function

Abstract

This utility model discloses an angular spring positioning pin with compensation function, including a diamond pin, a spring, a sliding member, a fixing component, and an upper end cover. The fixing component has a cavity, and the spring and sliding member are horizontally positioned within the cavity, with both ends of the spring contacting the sliding member and the fixing component respectively. The top of the fixing component has a circular hole connecting to the cavity. The upper end cover is annular and is fixed to the outer edge of the hole on the top of the fixing component by bolt a. A crossbar is provided inside the upper end cover, and the top of the sliding member has a mounting hole. The diamond pin rotates around the crossbar, with its lower end inserted into the mounting hole and its upper end inserted into the pin hole of the workpiece. In use, rotating the diamond pin causes its lower end to pass through the mounting hole, driving the sliding member to compress the spring. The spring rebounds, causing the upper end of the diamond pin to compress the pin hole. This utility model can automatically and flexibly compensate for accumulated errors under frequent disassembly and assembly or dynamic loads, preventing low positioning accuracy of the workpiece or damage to the workpiece.

Description

Technical Field

[0001] This utility model belongs to the field of adjustable fastener technology, specifically relating to an angular spring positioning pin with compensation function. Background Technology

[0002] In the fields of mechanical assembly and precision machining, angular locating pins are core components for achieving workpiece angular positioning, and their performance directly affects assembly accuracy and repeatability. Traditional angular locating pins often employ rigid connections, such as fixed tapered pins or beveled surfaces to achieve angle locking. However, such structures are prone to wear on the contact surfaces under frequent disassembly and dynamic loads, leading to a gradual increase in the positioning gap and an inability to automatically compensate for angular deviations. Especially under conditions of vibration or temperature changes, accumulated errors significantly reduce positioning accuracy, requiring frequent manual adjustments and severely impacting production efficiency. Furthermore, rigid locating pins have poor adaptability to workpiece machining errors; even slight angular deviations can easily cause over-constraint problems, potentially damaging the workpiece or fixture.

[0003] In existing technologies, some improvements attempt to introduce elastic elements to enhance the adaptability of the locating pin. For example, a vertical compression spring structure can alleviate axial impact, but the spring's direction of action does not match the angular adjustment plane, making it unable to effectively correct angular deviations. Furthermore, such elastic structures are susceptible to external environmental interference during dynamic operation; for instance, cutting chips, dust, and other debris can enter the spring cavity, causing spring jamming or increased movement resistance. Conventional dustproof designs often rely on external sealing rings or protective covers, but these sealing structures are prone to wear and cannot meet the heat dissipation requirements of high-speed moving parts. After long-term use, their dustproof performance significantly decreases, shortening the service life of the locating pin.

[0004] Regarding support stability, traditional locating pins typically use an integral base or simple bolt fixing method, making it difficult to flexibly adjust the support stiffness according to working conditions. When the positioning system is subjected to multi-directional loads, the fixed support structure is prone to local deformation due to stress concentration. Existing adjustable support devices often suffer from low adjustment accuracy and insufficient locking force, causing the locating pin to experience slight displacement under dynamic working conditions, affecting positioning accuracy. In addition, the moving parts of conventional locating pins lack self-cleaning design, and dust easily accumulates in the gaps between moving parts, aggravating mechanical wear and hindering the normal operation of the compensation function.

[0005] Patent application CN104439815A discloses a welding positioning device. This device has a spring connected to its bottom to ensure stable electrode pressure during operation and high reliability. However, this device lacks lateral compensation and its support stability is significantly insufficient. These technical deficiencies indicate that existing angular positioning devices have significant shortcomings in dynamic compensation capability, environmental adaptability, and long-term reliability. There is an urgent need for an angular spring positioning pin structure with self-compensation function, strong anti-pollution capability, and stable support to solve the accuracy degradation problem caused by rigid wear, environmental interference, and support failure in traditional solutions. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model provides an angular spring positioning pin with compensation function, which can automatically and flexibly compensate for accumulated errors under frequent disassembly or dynamic load, and prevent low positioning accuracy of the workpiece or damage to the workpiece.

[0007] The above-mentioned objective of this utility model is achieved through the following technical solution:

[0008] This utility model provides an angular spring positioning pin with compensation function, including a diamond pin, a spring, a sliding member, a fixing component, and an upper end cover. The fixing component has a cavity, and the spring and the sliding member are horizontally arranged in the cavity. The two ends of the spring are in contact with the sliding member and the fixing component, respectively. The top of the fixing component has a circular hole communicating with the cavity. The upper end cover is annular and is fixed to the outer edge of the hole on the top of the fixing component by bolt a. A crossbar is provided inside the upper end cover, and the top of the sliding member has a mounting hole. The diamond pin rotates around the crossbar, and the lower end of the diamond pin is inserted into the mounting hole. The upper end of the diamond pin is inserted into the pin hole of the workpiece. In use, rotating the diamond pin causes its lower end to drive the sliding member to squeeze the spring through the mounting hole. The spring rebounds, causing the upper end of the diamond pin to squeeze the pin hole.

[0009] According to one embodiment of the present invention, the fixing component includes a base, a front cover and a rear cover. The base has a through hole that horizontally penetrates the base. The front cover and the rear cover are respectively connected to the base at both ends of the through hole by fasteners. The spring is in contact with the rear cover.

[0010] According to one embodiment of the present invention, the bottom of the base is provided with a ventilation pipe extending into the cavity.

[0011] According to one embodiment of the present invention, the sliding member is provided with a T-shaped hollow pipe inside, and the mounting hole and the hollow pipe are connected at the intersection of the T-shape. The lower end of the hollow pipe and the ventilation pipe form an axially connected airflow channel.

[0012] According to one embodiment of the present invention, a support column a is fixedly provided at the bottom of the base.

[0013] According to one embodiment of the present invention, the base side is provided with an auxiliary support mechanism, which includes a support block, a support column b and a distance adjustment block. The support block is detachably connected to the base side by bolt b, the support column b is fixedly disposed at the bottom of the support block, and the distance adjustment block is disposed between the support block and the base.

[0014] The advantages of this utility model compared with the existing technical solutions are:

[0015] 1. During use, the diamond pin needs to be rotated at a certain angle to cause the sliding part to compress the spring, so that the diamond pin can reach the appropriate position to insert and position the workpiece into the pin hole. When there is an accumulated error in the workpiece, the diamond pin will automatically and flexibly compensate for the accumulated error by returning to a certain angle through the elasticity of the spring, thus preventing low positioning accuracy or damage to the workpiece when the positioning gap gradually increases.

[0016] 2. The front and rear covers are separable from the base, which not only provides stable spring support but also facilitates quick disassembly and assembly of the cavity during equipment assembly and maintenance, significantly improving installation efficiency and providing a convenient channel for cleaning and maintenance of the internal components, effectively reducing maintenance costs.

[0017] 3. The ventilation pipe and the hollow pipe form an axially connected airflow channel. By venting air into the ventilation pipe from the bottom of the base, external dust is blocked from entering the cavity, preventing the spring and sliding parts from getting stuck or worn due to dust accumulation, thus improving the environmental adaptability of the device.

[0018] 4. The multi-point combination support layout of the base column and support block, through the coordinated adjustment of bolts and distance adjustment blocks, ensures the stability of the device under different installation foundation conditions and expands the application scenarios of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention.

[0020] Figure 2 The schematic diagram of the overall structure of this utility model shows: 1. Diamond pin; 2. Spring; 3. Sliding member; 31. Mounting hole; 32. Hollow pipe; 4. Fixing component; 41. Cavity; 42. Upper end cover; 421. Bolt a; 422. Crossbar; 43. Front end cover; 44. Rear end cover; 45. Base; 451. Ventilation pipe; 452. Support column a; 46. Fastener; 5. Auxiliary support mechanism; 51. Bolt b; 52. Support block; 53. Support column b; 54. Distance adjustment block. Detailed Implementation

[0021] The present invention will now be described in detail through specific embodiments, but this does not limit the scope of protection of the present invention.

[0022] Example 1

[0023] like Figure 1-2 As shown, this embodiment provides a center-fixed positioning fixture, including a diamond pin 1, a spring 2, a sliding member 3, and a fixing component 4.

[0024] The fixed component 4 has a horizontal cavity 41. The spring 2 and the sliding component 3 are coaxially arranged in the cavity 41. The two ends of the spring 2 are in contact with the sliding component 3 and the fixed component 4, respectively.

[0025] The upper end cover 42 is an annular component, which is fixed to the outer edge of the circular hole at the top of the base 45 by bolt a421 and forms a communication structure with the cavity 41. A crossbar 422 perpendicular to the spring 2 and the sliding member 3 is fixed inside the upper end cover 42. The top of the sliding member 3 is provided with a mounting hole 31. The diamond pin 1 rotates around the crossbar 422 and its lower end is inserted into the mounting hole 31. The rotation of the diamond pin 1 causes the sliding member 3 to move along the cavity 41 towards the direction of the spring 2 and squeeze the spring 2. The spring 2 rebounds and pushes the sliding member 3 to make the diamond pin 1 rotate.

[0026] The upper end of the diamond pin 1 is used to insert into the pin hole of the workpiece, and the lower end of the diamond pin 1 is inserted into the mounting hole 31 through the upper end cover 42. During use, the upper end of the diamond pin 1 needs to be rotated by a certain angle, causing the diamond pin 1 to rotate around the crossbar 422. At this time, the lower end of the diamond pin 1 drives the sliding member 3 to compress the spring 2 through the mounting hole 31, while the upper end of the diamond pin 1 exerts a certain squeezing force on the pin hole of the workpiece. When there is an accumulated error in the pin hole of the workpiece, the pin hole gap gradually increases. The diamond pin 1, through the elastic compensation of the spring 2, returns to a certain angle, thereby automatically and flexibly compensating for the accumulated error, enabling the diamond pin 1 to maintain high-precision positioning.

[0027] Cavity 41 includes a small cavity and a large cavity that are interconnected. Both the small cavity and the large cavity are cylindrical and their central axes coincide. The sliding member 3 includes a fixedly connected cylinder, a large ring, and a small ring. The cylinder passes through the middle of both the small cavity and the large cavity. Both the large ring and the small ring are located in the large cavity, with the small ring located on the side of the large ring furthest from the small cavity. Spring 2 is fitted onto the small ring and the cylinder, and contacts the large ring and the rear end cover 44, respectively.

[0028] The cylinder's diameter is slightly smaller than the small cavity's diameter, allowing the cylinder to move within the small cavity. The large ring's diameter is slightly smaller than the large cavity's diameter but larger than the small cavity's diameter, allowing the large ring to move within the large cavity and preventing it from entering the small cavity under the action of spring 2. The small ring's diameter is slightly smaller than the inner diameter of spring 2, positioning spring 2 on the outer circumference of the small ring and preventing deformation at the contact point between spring 2 and the large ring, thus affecting spring 2's elasticity.

[0029] The fixing component 4 includes a front cover 43, a rear cover 44 and a base 45. The base 45 has a through hole that runs horizontally through the base 45. The front cover 43 and the rear cover 44 are detachably connected to the base 45 at both ends of the through hole by fasteners 46, thereby forming a cavity 41. The front cover 43 is located on the side of the small cavity and the rear cover 44 is located on the side of the large cavity. The spring 2 is in contact with the rear cover 44.

[0030] The front cover 43 is connected to one end of the through hole where the small cavity is located, and the rear cover 44 is connected to one end of the through hole where the large cavity is located. By loosening bolt a421 and fastener 46, the upper cover 42, along with the diamond pin 1, is disengaged from the sliding member 3. The front cover 43 and the rear cover 44 are then removed. At this point, the spring 2 and the sliding member 3 can be moved out of the through hole on one side of the large cavity, allowing for cleaning of the inside of the through hole, or replacement or repair of the diamond pin 1, spring 2, and sliding member 3.

[0031] The base 45 is provided with a ventilation pipe 451 that runs through its bottom and extends to the cavity 41. The sliding member 3 is provided with a T-shaped hollow pipe 32. The mounting hole 31 and the hollow pipe 32 are connected at the intersection of the T. The lower end of the hollow pipe 32 and the ventilation pipe 451 form an axially connected airflow channel. A support column a452 is fixedly connected to the bottom of the base 45.

[0032] The ventilation duct 451 includes an inverted T-shaped duct and a vertical duct. The vertical outlet of the inverted T-shaped duct is connected to the hollow duct 32. One end of the horizontal portion of the inverted T-shaped duct is connected to the outside, and this end is plugged. The other end is connected to one end of the vertical duct inside the base 45. The other end of the vertical duct is connected to the outside at the bottom of the base 45. The ventilation duct 451 can be cleaned by removing the plug, allowing the horizontal portion of the inverted T-shaped duct to connect to the outside. The external ventilation device injects protective gas from the end of the vertical duct connected to the outside. After the protective gas enters the hollow duct 32 through the inverted T-shaped duct, part of it flows into the large cavity and the small cavity through both ends of the hollow duct 32, thus protecting the sliding member 3 and the spring 2. The other part enters the space formed by the diamond pin 1, the sliding member 3, the upper cover 42, and the base 45 through the mounting hole 31, thus protecting the diamond pin 1 and the sliding member 3.

[0033] Example 2

[0034] This embodiment adds an auxiliary support mechanism 5 compared to embodiment 1, while the rest is the same as embodiment 1.

[0035] An auxiliary support mechanism 5 is provided on the side of the base 45. The auxiliary support mechanism 5 includes a support block 52, a support column b53, and a distance adjustment block 54. The support block 52 is detachably connected to the side of the base 45 by bolts b51. The support column b53 is fixedly installed at the bottom of the support block 52. The distance adjustment block 54 is located between the support block 52 and the base 45. By replacing the distance adjustment block 54 with different sizes, the relative distance between the support block 52 and the base 45 can be adjusted, so that the base 45 can maintain stability under different installation foundation conditions.

[0036] like Figure 2 As shown, the bottom support surface of this invention is relatively small and the center of gravity is relatively high. Therefore, an auxiliary support mechanism 5 is needed to increase the bottom support surface to maintain the stability of this invention. When the space occupied by this invention during operation is large enough, a larger distance adjustment block 54 is used to increase the bottom support surface, thereby maintaining stability on inclined or uneven ground. When the space occupied by this invention during operation is small, a smaller distance adjustment block 54 is used to maximize the bottom support surface, which can also maintain the stability of this invention on relatively flat ground.

[0037] The embodiments described above are merely preferred embodiments of this utility model, and not all feasible embodiments of this utility model. For those skilled in the art, any obvious modifications made without departing from the principles and spirit of this utility model should be considered to be included within the scope of protection of the claims of this utility model.

Claims

1. A angular spring positioning pin with compensation function, characterized in that, It includes a diamond pin (1), a spring (2), a sliding member (3), a fixing member (4) and an upper end cover (42). The fixing member (4) has a cavity (41). The spring (2) and the sliding member (3) are horizontally arranged in the cavity (41). The two ends of the spring (2) are in contact with the sliding member (3) and the fixing member (4) respectively. The top of the fixing component (4) is provided with a circular hole that connects to the cavity (41). The upper end cover (42) is annular. The upper end cover (42) is fixed to the outer edge of the hole at the top of the fixing component (4) by bolt a (421). A crossbar (422) is provided inside the upper end cover (42). The top of the sliding component (3) is provided with a mounting hole (31). The diamond pin (1) rotates around the crossbar (422) and its lower end is inserted into the mounting hole (31). The upper end of the diamond pin (1) is inserted into the pin hole of the workpiece. When in use, the diamond pin (1) is rotated so that its lower end passes through the mounting hole (31) and drives the sliding part (3) to squeeze the spring (2). The spring (2) rebounds so that the upper end of the diamond pin (1) squeezes the pin hole.

2. The angular spring positioning pin with compensation function according to claim 1, characterized in that, The fixing component (4) includes a base (45), a front cover (43) and a rear cover (44). The base (45) has a through hole that runs horizontally through the base (45). The front cover (43) and the rear cover (44) are connected to the base (45) at both ends of the through hole by fasteners (46). The spring (2) is in contact with the rear cover (44).

3. A angular spring positioning pin with compensation function according to claim 2, characterized in that, The base (45) has a ventilation pipe (451) extending to the cavity (41) at its bottom.

4. A angular spring positioning pin with compensation function according to claim 3, characterized in that, The sliding member (3) has a T-shaped hollow pipe (32) inside. The mounting hole (31) and the hollow pipe (32) are connected at the intersection of the T-shape. The lower end of the hollow pipe (32) and the ventilation pipe (451) form an axially connected airflow channel.

5. A angular spring positioning pin with compensation function according to claim 4, characterized in that, The base (45) is fixedly provided with a support column a (452) at its bottom.

6. A angular spring positioning pin with compensation function according to claim 5, characterized in that, The base (45) is provided with an auxiliary support mechanism (5) on its side. The auxiliary support mechanism (5) includes a support block (52), a support column b (53) and a distance adjustment block (54). The support block (52) is detachably connected to the side of the base (45) by bolt b (51). The support column b (53) is fixedly installed at the bottom of the support block (52). The distance adjustment block (54) is located between the support block (52) and the base (45).

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