Telescopic positioning pin

Abstract

The utility model relates to a telescopic positioning pin which comprises a pin body, a pin seat, a spring and a connecting sleeve, the pin seat is located above the pin body, the pin body is in a cylinder shape extending vertically in the axial direction, and the connecting sleeve is located above the pin body and installed on the pin seat in a sliding mode in the vertical direction. The pin body is provided with a connecting sleeve, the pin seat is provided with a sliding groove corresponding to the connecting sleeve and a loading opening with the same diameter as the connecting sleeve, the connecting sleeve comprises a limiting ring which is located at the bottom of the sliding groove and has the same diameter as the sliding groove, and the diameter of the limiting ring is larger than that of the loading opening. The upper end of the spring is located in the sliding groove and fixedly connected with the pin base, the lower end of the spring is located in the matching groove and fixedly connected with the pin body, and the pin body compresses the spring and is detachably connected with the pin base. By the adoption of the scheme, the overall length of the telescopic positioning pin can be adjusted by selecting whether the pin body is detachably connected with the pin base or not.

Description

Technical Field

[0001] The utility model relates to a positioning pin, in particular to a telescopic positioning pin. Background Art

[0002] A locating pin is a mechanical component that is widely used in manufacturing, assembly lines, and various situations where workpieces need to be precisely positioned. Its main function is to ensure that the workpiece maintains its accurate position during machining, measurement, or assembly.

[0003] The locating pin mainly consists of a pin body and a pin seat. The pin seat is used to fix one end of the locating pin and is usually fixed to a fixture, machine tool workbench or other fixing device, while the pin rod is usually inserted into a pre-drilled hole in the workpiece in a tight fit, or matches the hole on another part. After insertion, the locating pin does not permanently fix the workpiece, but allows the workpiece to be easily removed or moved after positioning is completed.

[0004] However, if the positioning pins need to be installed in holes of different depths, positioning pins with different lengths need to be manufactured to match with sockets of different specifications, which brings inconvenience to use.

[0005] Therefore, how to achieve adjustable length of the positioning pin has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a telescopic positioning pin that can adjust the overall length of the positioning pin by selecting whether the pin body is detachably connected to the pin seat.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: including a pin body and a pin seat, the pin seat is located above the pin body, the pin body is cylindrical and extends axially up and down, and also includes a spring and a connecting sleeve, the connecting sleeve is located above the pin body and is slidably installed on the pin seat along the up and down directions, the pin seat is provided with a sliding groove and a loading port with the same diameter as the connecting sleeve corresponding to the connecting sleeve, the connecting sleeve includes a limiting ring located at the bottom of the sliding groove and the same diameter as the sliding groove, the diameter of the limiting ring is larger than the diameter of the loading port, and a matching groove for the connecting sleeve to be installed is provided on the pin body, the spring is circumferentially sleeved on the connecting sleeve and the upper end is located in the sliding groove and fixedly connected to the pin seat, the lower end is located in the matching groove and fixedly connected to the pin body, the pin body compresses the spring and is detachably connected to the pin seat.

[0008] The present invention is further configured as follows: the circumferential protrusion of the pin body is provided with a plurality of connecting plugs made of a material that is easy to deform, the pin seat is provided with a connecting slot corresponding to each connecting plug, and each connecting plug is respectively inserted into a corresponding connecting slot and is buckled and connected with the pin body.

[0009] The utility model is further configured as follows: each of the connecting plug blocks is recessed inwardly and provided with a matching slot, the matching slot is arranged in a ring shape, and the pin seat is located in each connecting slot and is provided with a matching plug block.

[0010] The present invention is further configured to include a limiting member detachably connected to the pin body, wherein the limiting member includes a positioning plate located below the pin body and a positioning rod into which the pin body is inserted, and the diameter of the positioning plate is greater than the diameter of the pin body.

[0011] The utility model is further configured as follows: the positioning rod is circumferentially provided with external threads, and the positioning rod is threadedly matched with the pin body.

[0012] The utility model is further configured as follows: it also includes an anti-slip sleeve located circumferentially of the pin seat, the anti-slip sleeve is provided with a plurality of contact grooves circumferentially, the pin seat is located on the upper and lower sides of the anti-slip sleeve and is respectively installed with an upper limit ring and a lower limit ring, the anti-slip sleeve includes a left connecting section and a right connecting section, and the left connecting section and the right connecting section are magnetically connected.

[0013] The present invention is further configured as follows: the upper limit ring is made of a material that is easy to deform; the pin seat is provided with a plurality of positioning inserts at intervals in the circumferential direction; and the upper limit ring is provided with a positioning slot corresponding to each positioning insert.

[0014] By adopting the above technical solution, since the pin seat is provided with a sliding groove corresponding to the connecting sleeve, when the overall length of the locating pin is greater than the depth of the pin hole on the workpiece, the spring is compressed by sliding the connecting sleeve upward so that the connecting sleeve is completely located in the sliding groove. At this time, the upper end surface of the pin body will be against the lower end surface of the pin seat. After the detachable connection between the pin seat and the pin body is completed, the overall height of the locating pin is reduced and adapted to the depth of the pin hole. When the locating pin is required to cooperate with a deeper pin hole on the workpiece, the detachability of the pin body and the pin seat is released. The elasticity of the spring itself can prompt the spring to reset and drive the connecting sleeve to move down quickly and gradually leave the sliding groove. Since the diameter of the limit ring is greater than the diameter of the loading port, it cannot move down from the loading port, so that the connecting sleeve and the pin body can be stably connected to the pin seat. At this time, the downward movement of the connecting sleeve can increase the overall length of the locating pin, so that the pin body and the connecting sleeve can be located in the pin hole of the workpiece, thereby realizing the positioning effect of the locating pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A perspective view of a specific embodiment of the present utility model;

[0017] Figure 2 This is an exploded view of the utility model;

[0018] Figure 3 This is a cross-sectional view of the present invention from top to bottom;

[0019] Figure 4 This is a cross-sectional view of the present invention from the front to the back;

[0020] Figure 5 for Figure 3 A magnified view of middle A;

[0021] Figure 6 for Figure 4 Enlarged view of middle B;

[0022] Figure 7 for Figure 4 Enlarged view of C in the middle.

[0023] In the figure: 1-pin body, 11-matching groove, 12-connecting plug, 121-matching slot;

[0024] 2-pin seat, 21-sliding groove, 22-loading port, 23-connecting slot, 24-matching plug, 25-upper limit ring, 251-positioning slot, 26-lower limit ring, 27-positioning plug;

[0025] 3- Spring;

[0026] 4-connecting sleeve, 41-limiting ring;

[0027] 5-limiting piece, 51-positioning plate, 52-positioning rod, 521-external thread;

[0028] 6-anti-slip sleeve, 61-contact groove, 62-left connecting section, 63-right connecting section. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] like Figure 1-Figure 7As shown, the utility model discloses a telescopic positioning pin, including a pin body 1 and a pin seat 2, the pin seat 2 is located above the pin body 1, the pin body 1 is cylindrical and extends axially up and down, and the pin seat 2 is fixed to an object such as a fixture or a machine tool workbench, and then the pin body 1 is inserted into the pin hole of a workpiece or a part, thereby realizing the positioning of the positioning pin on the workpiece during processing (this is a prior art and will not be elaborated on here), and further includes a spring 3 and a connecting sleeve 4, the connecting sleeve 4 is located above the pin body 1 and is slidably installed on the pin seat 2 in the up and down direction, the pin seat 2 The corresponding connecting sleeve 4 is provided with a sliding groove 21 and a loading port 22 with the same diameter as the connecting sleeve 4. The connecting sleeve 4 includes a limiting ring 41 with the same diameter as the sliding groove 21 at the bottom of the sliding groove 21. The diameter of the limiting ring 41 is larger than the diameter of the loading port 22. The pin body 1 is provided with a matching groove 11 for the connecting sleeve 4 to be installed. The spring 3 is sleeved around the connecting sleeve 4 and the upper end is located in the sliding groove 21 and is fixedly connected to the pin seat 2 by welding or the like. The lower end is located in the matching groove 11 and is fixedly connected to the pin body 1 by welding or the like. The body 1 compresses the spring 3 and is detachably connected to the pin seat 2 by means of buckling, magnetic attraction, etc. Since the pin seat 2 is provided with a sliding groove 21 corresponding to the connecting sleeve 4, when the overall length of the locating pin is greater than the depth of the pin hole on the workpiece, the spring 3 is compressed by sliding the connecting sleeve 4 upward so that the connecting sleeve 4 is completely located in the sliding groove 21. At this time, the upper end surface of the pin body 1 will be against the lower end surface of the pin seat 2. After the detachable connection between the pin seat 2 and the pin body 1 is completed, the overall height of the locating pin is reduced to adapt to the depth of the pin hole. When the locating pin is required to be fixed to the workpiece, the locating pin 2 is removed. When the deeper pin hole is matched, the pin body 1 and the pin seat 2 are released from being disassembled, and the elasticity of the spring 3 itself can cause the spring 3 to reset and drive the connecting sleeve 4 to move down quickly and gradually leave the sliding groove 21. Moreover, since the diameter of the limiting ring 41 is larger than the diameter of the loading port 22, it cannot move down from the loading port 22, so that the connecting sleeve 4 and the pin body 1 can be stably connected to the pin seat 2. At this time, the downward movement of the connecting sleeve 4 can increase the overall length of the locating pin, so that the pin body 1 and the connecting sleeve 4 can be located in the pin hole of the workpiece, thereby realizing the positioning function of the locating pin.

[0031] Among them, the circumferential protrusions of the pin body 1 are provided with a number of connecting plugs 12 made of rubber or other easily deformable materials, and the pin seat 2 is provided with a connecting slot 23 corresponding to each connecting plug 12, and each connecting plug 12 is respectively inserted into the corresponding connecting slot 23 and is snap-fitted with the pin body 1. When the connecting sleeve 4 is slid upward, the upper end surface of the pin body 1 is abutted against the lower end of the pin seat 2. At this time, the circumferential connecting plugs 12 of the pin body 1 can be inserted upward into the corresponding connecting slots 23 on the pin seat 2, thereby realizing the snap-fit ​​connection between each connecting plug 12 and the pin body 1, so that when it is necessary to shorten the overall length of the locating pin, the pin body 1 and the pin seat 2 can be stably connected after the connecting sleeve 4 slides upward, and the connecting sleeve 4 of the locating pin will not be exposed in the absence of external force, thereby maintaining this state and inserting the pin body 1 into the pin hole of the workpiece.

[0032] Among them, each of the connecting blocks 12 is recessed inwardly and provided with a matching slot 121, and the matching slot 121 is arranged in a ring shape. The pin seat 2 is located in each connecting slot 23 and is provided with a matching block 24. Since an upward force is applied to the pin body 1 to drive the connecting sleeve 4 to slide upward into the sliding groove 21, the connecting block 12 that first enters the corresponding connecting slot 23 position will contact the matching block 24 in the corresponding connecting slot 23 and then force it to pass upward to achieve the matching between the matching slot 121 and the matching block 24. When it is necessary to slide the connecting sleeve 4 downward to increase the overall length of the locating pin, a downward force is applied to the pin body 1 so that each connecting block 12 is subjected to the downward force and drives the part located above the matching slot 121 to pass downward over the corresponding matching block 24, thereby realizing the separation of each connecting block 12 from the corresponding connecting slot 23.

[0033] In addition, it also includes a limiting member 5 that is detachably connected to the pin body 1 by means of bolts, snap-fits, etc., and the limiting member 5 includes a positioning plate 51 located below the pin body 1 and a positioning rod 52 in which the pin body 1 is inserted. The diameter of the positioning plate 51 is larger than the diameter of the pin body 1. After the pin body 1 of the positioning pin is installed into the pin hole on the workpiece, the positioning pin will not permanently fix the workpiece. When the positioning pin needs to be positioned on the workpiece for a long time, the positioning plate 51 is located below the pin body 1 by inserting the pin body 1 into the pin hole and then installing the limiting member 5. This makes the positioning pin difficult to be easily removed without the action of external force, thereby preventing unrelated personnel from moving the workpiece and the positioning pin at will.

[0034] Preferably, the positioning rod 52 is circumferentially provided with an external thread 521, and the positioning rod 52 is threadedly matched with the pin body 1. Therefore, after the pin body 1 of the positioning pin is inserted into the pin hole of the workpiece, the positioning rod 52 is rotated and installed into the pin body 1, so that the positioning plate 51 is located below the pin body 1, and the pin body 1 cannot be moved at will without the action of external force. When the positioning pin needs to be removed from the pin hole on the workpiece, force is first applied to the positioning plate 51 to drive the positioning rod 52 to rotate in the opposite direction, so that the limit member 5 is removed from the pin body 1, and then the pin body 1 of the positioning pin can be removed from the corresponding pin hole.

[0035] In addition, it also includes an anti-slip sleeve 6 located in the circumference of the pin seat 2, and the anti-slip sleeve 6 is provided with a plurality of contact grooves 61 in the circumference. The pin seat 2 is respectively provided with an upper limit ring 4125 and a lower limit ring 4126 on the upper and lower sides of the anti-slip sleeve 6. The anti-slip sleeve 6 includes a left connecting segment 62 and a right connecting segment 63. The left connecting segment 62 and the right connecting segment 63 are magnetically connected. The anti-slip sleeve 6 can increase the friction between the locating pin pin seat 2 and the surrounding structure (such as a fixture, a machine tool workbench, etc.), thereby reducing the risk of accidental movement of the locating pin during processing or vibration, and the anti-slip sleeve 6 can provide a layer of protection to prevent the locating pin from direct contact and possible damage. The surface of the damaged fixture or other precision parts is damaged, and since the anti-slip sleeve 6 is provided with a number of contact grooves 61, the roughness of the anti-slip sleeve 6 itself is stably improved, thereby increasing the friction force. Moreover, since the pin seat 2 is located on the upper and lower sides of the anti-slip sleeve 6 and is respectively provided with an upper limit ring 4125 and a lower limit ring 4126, after the anti-slip sleeve 6 is bent and put on the circumference of the pin seat 2 and the magnetic connection between the left connecting section 62 and the right connecting section 63 is completed, the anti-slip sleeve 6 is limited by the upper limit ring 4125 and the limit ring 41, thereby enabling the anti-slip sleeve 6 to be stably put on the pin seat 2 and will not move up and down, thereby providing convenience for the fixation of the anti-slip sleeve 6 and the pin seat 2.

[0036] Preferably, the upper limit ring 4125 is made of a deformable material such as rubber, and the pin seat 2 is provided with a plurality of positioning blocks 27 at circumferential intervals. The upper limit ring 4125 is provided with a positioning slot 251 corresponding to each positioning block 27. The upper limit ring 4125 is bent to pass downward over the corresponding positioning block 27. After each positioning block 27 is respectively inserted into the corresponding positioning slot 251, the upper limit ring 4125 can be stably located on the pin seat 2 without rotating or moving.

[0037] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A telescopic positioning pin, comprising a pin body and a pin seat, wherein the pin seat is located above the pin body, and the pin body is cylindrical and extends axially up and down, characterized in that: It also includes a spring and a connecting sleeve, the connecting sleeve is located above the pin body and is slidably installed on the pin seat in the up and down directions, the pin seat is provided with a sliding groove and a loading port with the same diameter as the connecting sleeve corresponding to the connecting sleeve, the connecting sleeve includes a limiting ring with the same diameter as the sliding groove located at the bottom of the sliding groove, the diameter of the limiting ring is larger than the diameter of the loading port, and a matching groove for the connecting sleeve to be installed is provided on the pin body, the spring is arranged around the connecting sleeve and the upper end is located in the sliding groove and fixedly connected to the pin seat, the lower end is located in the matching groove and fixedly connected to the pin body, the pin body compresses the spring and is detachably connected to the pin seat.

2. The telescopic positioning pin according to claim 1, characterized in that: The pin body is provided with a plurality of connection plugs made of a deformable material on the circumferential protrusion, and the pin seat is provided with a connection slot corresponding to each connection plug. Each connection plug is respectively inserted into a corresponding connection slot and is buckled and connected with the pin body.

3. The telescopic positioning pin according to claim 2, characterized in that: Each of the connecting plug blocks is recessed inwardly and provided with a matching slot, the matching slot is arranged in a ring shape, and the pin seat is located in each connecting slot and is provided with a matching plug block.

4. The telescopic positioning pin according to claim 1, characterized in that: It also includes a limiting member detachably connected to the pin body, the limiting member includes a positioning plate located below the pin body and a positioning rod inserted into the pin body, and the diameter of the positioning plate is larger than the diameter of the pin body.

5. The telescopic positioning pin according to claim 4, characterized in that: The positioning rod is provided with external threads in the circumference thereof, and the positioning rod is threadedly matched with the pin body.

6. The telescopic positioning pin according to claim 1, characterized in that: It also includes an anti-slip sleeve located around the pin seat, and a number of contact grooves are arranged around the anti-slip sleeve. The pin seat is located on the upper and lower sides of the anti-slip sleeve, and an upper limit ring and a lower limit ring are respectively installed. The anti-slip sleeve includes a left connecting section and a right connecting section, and the left connecting section and the right connecting section are magnetically connected.

7. The telescopic positioning pin according to claim 6, characterized in that: The upper limit ring is made of a material that is easy to deform. The pin seat is provided with a plurality of positioning blocks at intervals in the circumferential direction. The upper limit ring is provided with a positioning slot corresponding to each positioning block.

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