Pneumatic positioning pin

Abstract

The utility model relates to the technical field of automation industry, in particular to a pneumatic positioning pin which comprises a positioning pin body, an air cylinder and a buffering mechanism, a positioning hole is formed in the output end of the air cylinder, a connecting rod is arranged in the positioning hole, the buffering mechanism comprises a limiting cover, a plurality of buffering assemblies and a base, and each buffering assembly comprises two buffering springs and a buffering plate. A buffering pad is arranged on the front end face of the buffering plate, two sliding rods are arranged on the rear end face of the buffering plate, limiting pieces are arranged at one ends of the sliding rods, side plates are arranged on the two sides of the base, two supporting plates are arranged at the two ends of the base, and the limiting cover abuts against the air cylinder and is further slidably connected with the corresponding side plates. The buffer springs are arranged on the sliding rods in a sleeving mode, the two sliding rods are connected with the supporting plate in a sliding mode, the buffer cushion abuts against the air cylinder, the air cylinder is buffered through the buffer springs and the buffer cushion, and therefore impact force generated when the air cylinder operates can be reduced, and the service life of the air cylinder is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of automated industry, in particular to a pneumatic positioning pin. Background Art

[0002] In the field of welding technology, pneumatic locating pins are widely used. Pneumatic locating pins are mainly composed of a cylinder and a locating pin. The fixed end of the locating pin is connected to the telescopic rod of the cylinder by a screw. The telescopic rod of the cylinder is a circular design and is not fixed inside the cylinder body. Generally, it can only rely on its own friction to maintain stability. However, when a certain thrust is applied from the outside, the telescopic rod will rotate relative to the cylinder body; as mentioned above, the locating pin and the telescopic rod are fixed by screws, but the screws themselves do not have a precise positioning function, and the center of the locating pin may not be coaxial with the center of the telescopic rod; if the locating pin is subjected to a thrust from the hole wall during the insertion of the product positioning hole, the locating pin may push the telescopic rod to rotate, and the locating pin may be stuck in the product, which may seriously cause the product to be pulled and deformed, affecting the welding accuracy and welding pass rate.

[0003] The prior art patent CN219598520U discloses a pneumatic locating pin, including a cylinder, a locating pin, a connecting rod and a guide sleeve, one end of the connecting rod is fixedly connected to the telescopic rod of the cylinder, and the other end is fixedly connected to the fixed end of the locating pin through a T-shaped sliding structure, the installation position of the guide sleeve is fixed, and the locating pin passes through the guide sleeve. The pneumatic locating pin provided by the application utilizes the rotation of the telescopic rod of the cylinder and the longitudinal sliding of the connecting rod to compensate for the longitudinal deviation of the force transmission between the cylinder and the locating pin, realizes the power linkage between the cylinder and the locating pin, and the force transmission of the cylinder is not affected by the accuracy, which ensures the force balance of the locating pin, ensures the positioning accuracy of the locating pin, and improves the welding qualification rate of the product.

[0004] However, in the above-mentioned prior art, since the cylinder will generate impact force on itself during operation, and the cylinder itself does not have a buffering function, the service life of the cylinder will be reduced under such impact force. Utility Model Content

[0005] The utility model aims to provide a pneumatic positioning pin, aiming to solve the technical problem in the prior art that the cylinder will generate impact force on itself during operation, and the cylinder itself has no buffering function, thereby reducing the service life of the cylinder under such impact force.

[0006] To achieve the above-mentioned purpose, the utility model adopts a pneumatic positioning pin, including a positioning pin, a cylinder and a buffer mechanism, the output end of the cylinder has a positioning hole, a connecting rod is arranged in the positioning hole, the positioning pin is slidably connected with the connecting rod and is located at the end of the connecting rod away from the cylinder, the buffer mechanism includes a limit cover, a plurality of buffer components and a base, the buffer component includes two buffer springs and a buffer plate, the front end surface of the buffer plate is provided with a buffer pad, the rear end surface of the buffer plate is provided with two sliding rods, one end of the sliding rod is provided with a limit plate, side plates are arranged on both sides of the base, and both ends of the base are Two support plates are provided, the limit cover and the cylinder are mutually supported and covered on the top of the cylinder, the limit cover is also slidably connected with the corresponding side plate and is located between the two side plates, and the cylinder is located between the base and the two side plates, the buffer spring is sleeved on the sliding rod and is supported between the support plate and the buffer plate, the two sliding rods are respectively slidably connected with the support plate, are located in the support plate, and pass through the support plate, the buffer pad and the cylinder are mutually supported and are located at one end of the cylinder, and the output end of the cylinder is located between the corresponding two support plates.

[0007] Among them, the limit cover includes two sliders and a cover body, the inner side of the side plate is provided with a slide groove, the two sliders are respectively fixedly connected to the cover body and are located on both sides of the cover body, the two sliders are also respectively slidably connected to the side plates and are located in the corresponding slide grooves, the cover body and the cylinder are mutually supported and covered on top of the cylinder.

[0008] Among them, two screws are arranged on the outer side of the side plate, and one end of the sliding block has two thread grooves. The two threads are respectively threadedly connected with the sliding block, and are located in the corresponding thread grooves and penetrate the side plate.

[0009] Wherein, the pneumatic positioning pin also includes a guide sleeve, which is threadedly connected to the positioning pin and sleeved at the connection between the positioning pin and the connecting rod.

[0010] Among them, the connecting rod includes a positioning part, a T-block and a rod body, a T-slot is provided above the positioning pin, the positioning part is fixedly connected to the rod body and is located at one end of the rod body, the positioning part is also slidably connected to the cylinder and is located in the positioning hole, the T-block is fixedly connected to the rod body and is located at the other end of the rod body, the positioning pin is slidably connected to the T-block and is located on the T-block, and the T-block is located in the T-slot.

[0011] Wherein, a bolt is provided at the output end of the cylinder, the bolt is threadedly connected to the positioning portion, is located in the positioning portion, and passes through the positioning hole.

[0012] The utility model discloses a pneumatic positioning pin, comprising a positioning pin, a cylinder and a buffer mechanism, wherein the output end of the cylinder has a positioning hole, a connecting rod is arranged in the positioning hole, the buffer mechanism comprises a limit cover, a plurality of buffer components and a base, the buffer component comprises two buffer springs and a buffer plate, the front end surface of the buffer plate is provided with a buffer pad, the rear end surface of the buffer plate is provided with two sliding rods, one end of the sliding rod is provided with a limit plate, side plates are arranged on both sides of the base, and two support plates are arranged on both ends of the base, the limit cover and the cylinder are mutually supported, the limit cover is also slidably connected with the corresponding side plate, the buffer spring is sleeved on the sliding rod, the two sliding rods are respectively slidably connected with the support plate, the buffer pad and the cylinder are mutually supported, the cylinder is buffered by the buffer spring and the buffer pad, thereby reducing the impact force generated by the cylinder during operation, thereby improving the service life of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model 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, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a three-dimensional stereogram of the first embodiment of the utility model.

[0015] Figure 2 It is a side view of the first embodiment of the utility model.

[0016] Figure 3 The utility model Figure 2 Section view along line AA.

[0017] Figure 4 It is a front view of the second embodiment of the utility model.

[0018] Figure 5 The utility model Figure 4 Sectional view along line BB.

[0019] 101-locating pin, 102-cylinder, 103-locating hole, 104-connecting rod, 105-thread groove, 106-base, 107-buffer spring, 108-buffer plate, 109-buffer pad, 110-sliding rod, 111-limiting plate, 112-side plate, 113-support plate, 114-slider, 115-cover body, 116-slide groove, 117-screw, 201-guide sleeve, 202-locating part, 203-T-block, 204-rod body, 205-T-slot, 206-bolt. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0021] First embodiment:

[0022] See also Figure 1 to Figure 3 ,in Figure 1 It is a three-dimensional stereogram of the first embodiment of the utility model. Figure 2 is a side view of the first embodiment of the utility model, Figure 3 The utility model Figure 2 Section view along line AA.

[0023] The utility model provides a pneumatic positioning pin 101, including the positioning pin 101, a cylinder 102 and a buffer mechanism, the buffer mechanism including a limit cover, a plurality of buffer components and a base 106, the limit cover including two sliders 114 and a cover body 115, and the above-mentioned scheme solves the technical problem that the cylinder 102 will generate impact force on itself during operation, and the cylinder 102 itself has no buffering function, thereby reducing the service life of the cylinder 102 under such impact force.

[0024] According to this specific embodiment, the output end of the cylinder 102 has a positioning hole 103, and a connecting rod 104 is arranged in the positioning hole 103. The positioning pin 101 is slidably connected to the connecting rod 104 and is located at the end of the connecting rod 104 away from the cylinder 102. By changing the connection method between the cylinder 102 and the positioning pin 101, the self-rotation of the cylinder 102 and the longitudinal sliding of the connecting rod 104 are utilized to compensate for the longitudinal deviation of the force transmission between the cylinder 102 and the positioning pin 101, so as to realize the power linkage between the cylinder 102 and the positioning pin 101. The force transmission of the cylinder 102 is not affected by the accuracy, so the force balance of the positioning pin 101 is guaranteed, and the positioning accuracy of the positioning pin 101 is guaranteed.

[0025] Wherein, the buffer assembly includes two buffer springs 107 and a buffer plate 108, the front end surface of the buffer plate 108 is provided with a buffer pad 109, the rear end surface of the buffer plate 108 is provided with two sliding rods 110, one end of the sliding rod 110 is provided with a limiting plate 111, both sides of the base 106 are provided with side plates 112, and both ends of the base 106 are provided with two supporting plates 113, the limiting cover and the cylinder 102 are mutually abutted and covered on the top of the cylinder 102, the limiting cover is also slidably connected with the corresponding side plate 112, and is located between the two side plates 112, and the cylinder 102 is located between the base 106 and the two side plates 112, the buffer spring 107 is sleeved on the sliding rod 110, and abuts between the support plate 113 and the buffer plate 108, and the two sliding rods 110 are respectively connected to the support plate 113 and the buffer plate 108. The support plate 113 is slidably connected and is located inside and passes through the support plate 113. The buffer pad 109 and the cylinder 102 are mutually supported and located at one end of the cylinder 102, and the output end of the cylinder 102 is located between the corresponding two support plates 113. The cylinder 102 is buffered by the buffer spring 107 and the buffer pad 109, thereby reducing the impact force generated by the cylinder 102 during operation, thereby increasing the service life of the cylinder 102. The sliding rod 110 can facilitate supporting the buffer plate 108, and at the same time, the sliding rod 110 is slidably connected to the support plate 113, and the impact force of the cylinder 102 can be offset under the action of the buffer spring 107. The limit cover can prevent the cylinder 102 from moving upward, and the limit plate 111 can limit the moving distance of the sliding rod 110.

[0026] Secondly, the inner side of the side plate 112 is provided with a slide groove 116, and the two sliders 114 are respectively fixedly connected to the cover body 115 and are located on both sides of the cover body 115. The two sliders 114 are also respectively slidably connected to the side plates 112 and are located in the corresponding slide grooves 116. The cover body 115 and the cylinder 102 are mutually supported and covered on the top of the cylinder 102. The movement of the cover body 115 can be limited by the sliders 114, and the cover body 115 is also supported.

[0027] Again, two screws 117 are provided on the outer side of the side panel 112, and one end of the slider 114 has two thread grooves 105. The two threads are respectively threadedly connected to the slider 114 and are located in the corresponding thread grooves 105 and penetrate the side panel 112. The slider 114 can be easily fixed by the screws 117, thereby preventing the cover body 115 from being displaced, thereby improving the stability between the cover body 115 and the side panel 112.

[0028] When using the utility model, the cylinder 102 is placed between the two side plates 112, and the multiple buffer components are supported at the two ends of the cylinder 102 body, so that the buffer pad 109 supports the two ends of the cylinder 102, and then the cover body 115 is slid into the slide groove 116 through the slider 114 and fixed by the screw 117. The cover body 115 can limit the cylinder 102 from moving upward. When the cylinder 102 is running, it will move backward and be buffered by the buffer pad 109 and the buffer spring 107 at one end of the base 106. When the output end of the cylinder 102 is released instantly, its impact force will be offset by the multiple buffer springs 107 and the buffer pad 109. In this way, the technical problem that the cylinder 102 will generate impact force on itself when running, and the cylinder 102 itself does not have a buffering function, thereby reducing the service life of the cylinder 102 under such impact force is solved.

[0029] The second embodiment is:

[0030] Based on the first embodiment, please refer to Figure 4-5 ,in Figure 4 It is a front view of the second embodiment of the utility model. Figure 5 The utility model Figure 4 Cross-sectional view along line BB.

[0031] The utility model provides a pneumatic positioning pin 101 , which also includes a guide sleeve 201 . The connecting rod 104 includes a positioning portion 202 , a T-shaped block 203 and a rod body 204 .

[0032] For this specific embodiment, the guide sleeve 201 is threadedly connected to the positioning pin 101 and is sleeved on the connection between the positioning pin 101 and the connecting rod 104. The limiting effect of the guide sleeve 201 can ensure that the adaptive adjustment range of the positioning pin 101 is large enough and the stability of the positioning pin 101 during movement can also be ensured.

[0033] The positioning pin 101 has a T-slot 205 above, the positioning portion 202 is fixedly connected to the rod 204 and is located at one end of the rod 204, the positioning portion 202 is also slidably connected to the cylinder 102 and is located in the positioning hole 103, the T-block 203 is fixedly connected to the rod 204 and is located at the other end of the rod 204, and the positioning pin 101 is slidably connected to the T-block 203 and is located on the T-block 203, and the T-block 203 is located in the T-slot 205, if there is an axial deviation between the locating pin 101 and the output end of the cylinder 102, the locating pin 101 will automatically adjust to the correct position under the limiting action of the guide sleeve 201, and then the T-block 203 will have a relative displacement relative to the T-slot 205. This dynamic real-time adjustment can avoid the fixed end of the locating pin 101 from being tilted by force, and the locating pin 101 slides smoothly in the guide sleeve 201, eliminating the occurrence of the locating pin 101 being stuck in the guide sleeve 201 or in the inner hole.

[0034] Secondly, a bolt 206 is provided at the output end of the cylinder 102. The bolt 206 is threadedly connected to the positioning portion 202, is located inside the positioning portion 202, and passes through the positioning hole 103. The bolt 206 can be used to easily limit the movement of the positioning portion 202, thereby improving the stability between the positioning portion 202 and the positioning hole 103.

[0035] By using a pneumatic locating pin 101 of the present embodiment, the limiting effect of the guide sleeve 201 can ensure that the adaptive adjustment range of the locating pin 101 is large enough and the stability of the locating pin 101 during movement can be ensured. If an axial deviation occurs between the locating pin 101 and the output end of the cylinder 102, the locating pin 101 will automatically adjust correctly under the limiting effect of the guide sleeve 201, and then the T-block 203 will have a relative displacement relative to the T-slot 205. This dynamic real-time adjustment can avoid the fixed end of the locating pin 101 from being tilted by force. The locating pin 101 slides smoothly in the guide sleeve 201, eliminating the occurrence of the locating pin 101 being stuck in the guide sleeve 201 or in the inner hole. The bolt 206 can easily limit the movement of the locating portion 202, thereby improving the stability between the locating portion 202 and the locating hole 103.

[0036] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the utility model.

Claims

1. A pneumatic positioning pin, comprising a positioning pin and a cylinder, wherein the output end of the cylinder has a positioning hole, a connecting rod is arranged in the positioning hole, the positioning pin is slidably connected to the connecting rod and is located at an end of the connecting rod away from the cylinder, characterized in that: Also includes a buffer mechanism; The cam is provided with two camshafts, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs.

2. The pneumatic positioning pin according to claim 1, characterized in that: The limit cover includes two sliders and a cover body, the inner side of the side plate is provided with a slide groove, the two sliders are respectively fixedly connected to the cover body and are located on both sides of the cover body, the two sliders are also respectively slidably connected to the side plates and are located in the corresponding slide grooves, the cover body and the cylinder are mutually supported and covered on top of the cylinder.

3. The pneumatic positioning pin according to claim 2, characterized in that: Two screws are arranged on the outer side of the side plate, and one end of the sliding block has two thread grooves. The two threads are respectively threadedly connected with the sliding block, and are located in the corresponding thread grooves and penetrate the side plate.

4. The pneumatic positioning pin according to claim 3, characterized in that: The pneumatic positioning pin also includes a guide sleeve, which is threadedly connected to the positioning pin and sleeved at the connection between the positioning pin and the connecting rod.

5. The pneumatic positioning pin according to claim 4, characterized in that: The connecting rod includes a positioning portion, a T-block and a rod body, a T-slot is provided above the positioning pin, the positioning portion is fixedly connected to the rod body and is located at one end of the rod body, the positioning portion is also slidably connected to the cylinder and is located in the positioning hole, the T-block is fixedly connected to the rod body and is located at the other end of the rod body, the positioning pin is slidably connected to the T-block and is located on the T-block, and the T-block is located in the T-slot.

6. The pneumatic positioning pin according to claim 5, characterized in that: A bolt is provided at the output end of the cylinder. The bolt is threadedly connected to the positioning portion, is located in the positioning portion, and passes through the positioning hole.

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