A mobile positioning device for a positioning pin

Abstract

The application relates to the technical field of positioning devices, in particular to a mobile positioning device for positioning pins, which comprises mounting seats and positioning pin bodies, mounting holes and a plurality of locking grooves are formed in each of the mounting seats, locking blocks are slidably connected in the locking grooves, workpieces are mounted on the mounting seats, a plurality of positioning holes are formed in the lower end surfaces of the workpieces, positioning assemblies are arranged at the upper ends of the positioning pin bodies, positioning blocks are arranged on the positioning assemblies, a plurality of straightening grooves are formed in the circumferences of the upper ends of the positioning pin bodies, the mobile positioning device for positioning pins is prevented from having the problems of complex structure, aggravated abrasion, easy interruption of the process due to faults, difficult maintenance, high cost, the structural simplicity, running wear resistance, process continuity and maintenance convenience of the mobile positioning device for positioning pins are ensured, and the reliability and service life of the mobile positioning device for positioning pins are improved.

Description

Technical Field

[0001] This invention relates to the field of positioning device technology, specifically to a moving positioning device for a positioning pin. Background Technology

[0002] A locating pin moving positioning device is a mechanical device that drives the locating pin to move along a preset trajectory (straight line, arc, etc.) to achieve precise positioning of workpieces, parts, or molds during assembly, processing, and inspection. In the field of machining, locating pin moving positioning devices generally suffer from problems of accuracy fluctuation and insufficient stability. For example, during the operation of machining equipment, the vibration caused by friction and collision between machines will also affect the machining parts connected to the positioning device, resulting in inaccurate machining accuracy and greatly affecting the yield of finished products.

[0003] To address the aforementioned problems, existing technologies have proposed several solutions. For example, invention patent application CN202422038969.X discloses a mobile positioning device. This solution includes a moving component, side wing plates, and a slide rail assembly. The moving component is fixed on the track of the slide rail assembly. Side wing plates are fixed on both sides of the moving component. The moving component includes a support member and a driving member. The support member has two slots on its connecting surface with the slide rail assembly, each slot having a sliding groove that engages with the track. A driving member, fixed to the support member, is located between the slots. The driving member drives the moving component to move laterally on the slide rail assembly. The contact surface between the driving member and the slide rail assembly has a protrusion, and the slide rail assembly has a corresponding engaging block. A buffer spring is provided on the side of the support component. When the moving component moves to the edge of the track, it can abut against the slide rail component. The side wing plate and the buffer spring work together to buffer, which not only improves the connection stability but also effectively reduces the vibration caused by mechanical operation. However, the above solution still has some problems. The slide groove of the upper and lower slots of the support component and the slide rail are directly slidably engaged. The contact surface is rigid friction. Long-term lateral movement will cause uniform wear on the contact surface between the slide groove and the track, and the fit clearance will gradually increase. This will cause the moving component to move laterally and reduce the positioning accuracy. After the positioning accuracy decreases, it is easy to cause the positioning pin to fail to align with the target hole, resulting in inaccurate insertion, jamming, or skewed insertion. Even if it is inserted, the positioning will fail due to the excessive fit clearance, resulting in the loss of rigid constraint on the workpiece. Summary of the Invention

[0004] The purpose of this invention is to provide a movable positioning device for a positioning pin, so as to solve the problem in the existing movable positioning devices for positioning pins where sliding wear of the contact surface between the slide groove and the track leads to an increase in the fit clearance, which in turn causes the moving component to move laterally and reduces the positioning accuracy.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A movable positioning device for a positioning pin includes mounting bases and positioning pin bodies. A base plate is mounted below a plurality of mounting bases. Mounting holes are vertically formed on the plurality of mounting bases. The plurality of positioning pin bodies are slidably connected to the plurality of mounting holes. Locking grooves are formed on the sides of each of the plurality of mounting bases, communicating with the plurality of mounting holes. Locking blocks are slidably connected to each of the plurality of locking grooves, and the locking blocks are connected to the positioning pin bodies. The plurality of locking grooves are I-shaped. Workpieces are mounted on the plurality of mounting bases. A plurality of positioning holes are formed on the lower end face of the workpieces. The positions of the positioning holes are coaxial with the plurality of mounting holes. The diameter of the upper end of each of the plurality of positioning pin bodies is smaller than the diameter of the positioning holes. Each of the aforementioned positioning pin bodies has a positioning component at its upper end, and a positioning block on the positioning component. Multiple straightening grooves are formed around the upper circumference of each positioning pin body, and the positioning blocks are slidably connected within these grooves. After the workpiece is installed, the positioning blocks undergo radial displacement driven by the positioning component. The sliding connection between the positioning pin body and the mounting hole simplifies the power transmission path, and the optimized linkage structure through the I-shaped locking groove and locking block avoids the complexity of mechanical structure design. The radial displacement design of the positioning blocks within the straightening grooves reduces wear from frequent start-stop and direction switching of components. Furthermore, the smaller diameter of the upper end of the positioning pin compared to the positioning hole, combined with the positioning component, enables adaptive positioning, reducing additional wear caused by insufficient fitting accuracy. These designs collectively avoid the problems of complex structure, accelerated wear, easy failure interruption of the process, difficult maintenance, and high cost associated with positioning pin moving positioning devices. They ensure the structural simplicity, wear resistance, process continuity, and ease of maintenance of the positioning pin moving positioning device, thereby improving its reliability and service life.

[0006] Preferably, the positioning component includes movable blocks, and multiple mounting seats each have vertically formed sliding grooves located at their lower ends. Each movable block is rectangular and slidably connected within a sliding groove. Each movable block has a locking cavity and a positioning groove, which communicate with each positioning groove. The locking cavity is located below the positioning groove. The lower ends of multiple positioning pin bodies are threaded into the positioning grooves. Each positioning pin body has a coaxially formed positioning oil passage, the upper and lower ends of which communicate with the locking cavity and the correction groove, respectively. The sliding connection between the movable blocks and the sliding grooves provides support for the positioning pin bodies. The stable drive base and the connection structure between the locking cavity and the positioning groove simplify the linkage path between the positioning pin and the moving block, avoiding the problem of power transmission jamming. After the workpiece is installed in place, the operator moves the locking block upward until it moves to the upper end of the locking groove. Then, the operator moves the locking block to the left or right. At this time, the lower end of the positioning pin body will be screwed into the positioning groove through the thread, which will increase the oil pressure in the locking cavity. The oil pressure will then be transmitted to the straightening groove through the positioning oil passage. At this time, the positioning block will be pressed outward and contact the positioning hole to complete the locking of the workpiece. This ensures the smooth operation of the positioning pin moving positioning device, the wear resistance of the components, and the convenience of maintenance, and improves the structural stability and long-term operational reliability of the positioning pin moving positioning device.

[0007] Preferably, each of the multiple movable blocks has an adjusting oil port on its lower end face. The multiple adjusting oil ports are connected to the locking cavity, and the multiple adjusting oil ports are internally threaded with self-locking screws. By connecting the adjusting oil ports at the lower end of the movable blocks to the locking cavity, the oil pressure in the locking cavity can be changed by adjusting the self-locking screws in the adjusting oil ports, thereby changing the locking force of the positioning block on the positioning hole. This avoids the problem of workpiece damage due to excessive tightness or unstable positioning due to excessive looseness caused by fixed locking force. At the same time, the self-locking screws prevent the locking force from failing due to leakage or loosening after oil pressure adjustment, ensuring the adaptability of the positioning pin moving positioning device to workpieces of different specifications, the reliability of positioning and locking, as well as the stability of oil pressure adjustment and the convenience of operation.

[0008] Preferably, multiple annular raceways are evenly distributed on the inner sidewalls of the mounting holes, and multiple balls are rolled within each annular raceway. These balls are made of high-hardness bearing steel, and the locating pin bodies are respectively rolledly connected to the balls within the mounting holes. The annular raceways on the inner sidewalls of the mounting holes, with the high-hardness bearing steel balls embedded within, create a rolling connection between the locating pin body and the mounting hole. This avoids the problems of increased wear, high movement resistance, and jamming caused by the large friction area in traditional sliding connections. Simultaneously, the high-hardness bearing steel balls can resist deformation and wear caused by long-term rolling. These designs ensure smooth movement of the locating pin moving positioning device, reduce component wear, improve the accuracy and stability of the locating pin during sliding, extend the structural lifespan, and reduce the probability of failure caused by frictional resistance.

[0009] Preferably, the ends of the mounting bases with locking slots are all arc-shaped, and the end faces of the mounting bases with locking slots are provided with multiple limiting slots. The multiple limiting slots are respectively connected to the left and right ends of the locking slots. Each of the multiple locking blocks is slidably connected to a limiting block, and each of the multiple locking blocks is also fitted with a limiting spring. The two ends of the multiple limiting springs are respectively connected to the multiple locking blocks and the multiple limiting blocks. By making the end of the mounting base with the locking slot arc-shaped, the movement trajectory of the locking block is optimized. With the limiting block slidably connected to the limiting slot and the fitted limiting spring, the limiting block is locked into the limiting slot by the spring force when the locking block moves, thus achieving positioning. This avoids locking failure caused by offset, jamming, or unstable positioning during the movement of the locking block. At the same time, the arc-shaped design reduces friction and wear between the locking block and the mounting base, ensuring the smoothness of the locking operation of the positioning pin moving positioning device, the stability of the locking state, and the wear resistance and operational reliability of the components.

[0010] Preferably, electromagnets are installed on the side walls of the multiple limiting grooves on both sides, and limit switches are installed on the multiple mounting bases, with the limit switches located on the side of the limiting groove away from the locking groove. The electromagnets installed on both sides of the limiting groove, together with the existing mechanical limiting structure (limit block, limit spring), form a double lock. After the locking block is in place, the electromagnets are energized to generate magnetic force to tighten the limit block, reinforcing the mechanical lock and effectively avoiding the locking failure problem caused by long-term wear and spring fatigue of a single mechanical lock. Simultaneously, the limit switches detect the locking block's position and provide feedback, ensuring accurate completion of the locking action. This design avoids problems such as workpiece positioning deviation and equipment malfunction caused by locking failure, ensuring high reliability, operational safety, and operational accuracy of the positioning pin movement positioning device.

[0011] Preferably, the plurality of locating pin bodies and locating blocks are all made of any one of the following materials: high-carbon steel, alloy structural steel, and bearing steel. The outer surfaces of the locating pin bodies and locating blocks are provided with reinforcing surfaces, which are heat-treated to achieve a hardness between 50 HRC and 65 HRC. By using high-carbon steel, alloy structural steel, or bearing steel to make the locating pin bodies and locating blocks, and heat-treating their outer surfaces to achieve a hardness between 50 HRC and 65 HRC, the high strength of these materials and their high wear resistance after heat treatment prevent deformation and excessive wear due to insufficient material strength during frequent insertion, removal, sliding, and contact with the workpiece. This also prevents surface scratches from affecting positioning accuracy. These designs ensure the structural strength, surface wear resistance, and stability of the positioning accuracy of the locating pin moving positioning device, extend the service life of the components, and reduce the probability of failure and maintenance frequency due to wear. Preferably, each of the plurality of positioning pins has a correction block mounted on its upper surface. Each correction block is conical, and a polyurethane buffer pad is embedded in the head of each correction block. The conical correction blocks at the upper end of the positioning pins utilize the guiding effect of the conical surface to avoid jamming or impact problems caused by misalignment between the workpiece positioning hole and the positioning pin. The polyurethane buffer pad embedded in the head of the correction block absorbs the impact force during positioning, preventing wear between the positioning pin and the workpiece caused by rigid contact. These designs collectively ensure the smooth positioning and impact resistance of the positioning pin moving positioning device, reduce malfunctions caused by alignment deviations, and improve the service life and positioning reliability of the positioning pin moving positioning device.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention features a positioning component within the housing, a positioning block on the positioning component, and multiple circumferential grooves on the upper end of multiple positioning pin bodies. The sliding connection between the positioning pin body and the mounting hole simplifies the power transmission path, and the cooperation between the I-shaped locking groove and the locking block optimizes the linkage structure. These designs collectively avoid the problems of complex structure, accelerated wear, easy failure interruption of the process, difficult maintenance, and high cost in the positioning pin moving positioning device. This ensures the structural simplicity, wear resistance, process continuity, and maintenance convenience of the positioning pin moving positioning device, thereby improving the reliability and service life of the positioning pin moving positioning device.

[0013] 2. This invention features adjustable oil ports on the lower end faces of multiple movable blocks, each with a self-locking screw threaded into it. Adjusting the self-locking screw within the adjustable oil port changes the oil pressure within the locking cavity, thereby altering the locking force of the positioning block on the positioning hole. This avoids damage to the workpiece due to excessive tightness or unstable positioning due to excessive looseness caused by a fixed locking force. Simultaneously, the self-locking screw prevents leakage or loosening of the locking force after oil pressure adjustment, ensuring the adaptability of the positioning pin moving positioning device to workpieces of different specifications, the reliability of positioning and locking, and the stability and ease of operation of the oil pressure adjustment.

[0014] 3. This invention features multiple limiting grooves on the end faces of multiple mounting bases with locking grooves, multiple locking blocks with sliding limit blocks connected to them, and multiple locking blocks with limiting springs. When the locking blocks move, the spring force causes the limit blocks to engage with the limiting grooves to achieve positioning, avoiding locking failure caused by offset, jamming, or unstable positioning during the movement of the locking blocks. At the same time, the arc-shaped design reduces friction and wear between the locking blocks and the mounting bases, ensuring the smoothness of the locking operation of the positioning pin moving positioning device, the stability of the locking state, and the wear resistance and operational reliability of the components. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation of the movable positioning device for the positioning pin of the present invention; Figure 2 This is a schematic diagram of the structure of the moving positioning device of the positioning pin of the present invention; Figure 3 For the present invention Figure 2 Sectional view at point AA; Figure 4 For the present invention Figure 3 Sectional view at point BB; Figure 5 For the present invention Figure 3 Sectional view at CC; Figure 6 This is an exploded view of the movable positioning device of the positioning pin of the present invention.

[0016] In the diagram: 1. Mounting base; 2. Positioning pin body; 3. Base plate; 4. Mounting hole; 501. Locking groove; 502. Locking block; 6. Workpiece; 601. Positioning hole; 701. Positioning block; 702. Correction groove; 703. Movable block; 704. Sliding groove; 705. Locking cavity; 706. Positioning groove; 707. Positioning oil passage; 708. Adjusting oil port; 709. Self-locking screw; 710. Correction block; 711. Polyurethane buffer pad; 712. Reinforcing surface; 801. Annular raceway; 802. Ball bearing; 901. Limit groove; 902. Limit block; 903. Limit spring; 904. Electromagnet; 905. Limit switch. Detailed Implementation

[0017] Please see Figures 1 to 6 The present invention provides a moving positioning device for a positioning pin, the technical solution of which is as follows: Please refer to a positioning device for a positioning pin. Figures 1 to 6The system includes mounting bases 1 and locating pin bodies 2. A base plate 3 is mounted below each mounting base 1. Mounting holes 4 are vertically formed on each mounting base 1. Each locating pin body 2 is slidably connected within a mounting hole 4. A straightening block 710 is mounted on the upper surface of each locating pin. Each straightening block 710 is conical, and a polyurethane buffer pad 711 is embedded in the head of each straightening block 710. Multiple annular raceways 801 are evenly distributed on the inner walls of each mounting hole 4. Multiple balls 802, made of high-hardness bearing steel, are rolled within each annular raceway 801. Each locating pin body 2 is rolledly connected to the balls 802 within the mounting holes 4. Locking devices are provided on the sides of each mounting base 1. Multiple locking slots 501 are connected to multiple mounting holes 4. Each locking slot 501 has a slidably connected locking block 502, which is connected to the positioning pin body 2. Each locking slot 501 is I-shaped. One end of each mounting base 1 with a locking slot 501 is rounded. Multiple limiting slots 901 are formed on the end face of each mounting base 1 with a locking slot 501, connecting to the left and right ends of each locking slot 501. Each locking block 502 has a slidably connected limiting block 902, and each locking block 502 is fitted with a limiting spring 903. The two ends of the limiting spring 903 are connected to the locking blocks 502 and the limiting blocks 902, respectively. Multiple limiting slots 901... Electromagnets 904 are installed on the left and right side walls. Limit switches 905 are installed on multiple mounting bases 1. The limit switches 905 are located on the side of the limit groove 901 away from the locking groove 501. Workpieces 6 are installed on the multiple mounting bases 1. Multiple positioning holes 601 are formed on the lower end face of the workpieces 6. The positions of the positioning holes 601 are coaxial with the multiple mounting holes 4. The diameter of the upper end of multiple positioning pin bodies 2 is smaller than the diameter of the positioning holes 601. Positioning components are provided at the upper ends of the multiple positioning pin bodies 2. Positioning components have positioning blocks 701 and movable blocks 703. Multiple correction grooves 702 are formed on the circumference of the upper end of the multiple positioning pin bodies 2. Multiple positioning blocks 701 are slidably connected within the multiple correction grooves 702. Multiple mounting bases 1 are equipped with... A sliding groove 704 is vertically formed, and multiple sliding grooves 704 are located at the lower ends of multiple mounting bases 1. Multiple movable blocks 703 are rectangular and are slidably connected within the sliding grooves 704. Each movable block 703 has a locking cavity 705 and a positioning groove 706, which are connected. The locking cavities 705 are located below the positioning grooves 706. The lower ends of multiple positioning pin bodies 2 are threaded into the positioning grooves 706. Each positioning pin body 2 has a positioning oil passage 707 coaxially formed within it. The upper and lower ends of the positioning oil passages 707 are connected to the locking cavities 705 and the correction grooves 702, respectively. Each movable block 703 has an adjusting oil port 708 on its lower end surface.Multiple adjusting ports 708 are connected to locking chambers 705. Self-locking screws 709 are threaded into the internal parts of the multiple adjusting ports 708. Multiple locating pin bodies 2 and multiple locating blocks 701 are all made of alloy structural steel. Reinforcing surfaces 712 are provided on the outer surfaces of the multiple locating pin bodies 2 and multiple locating blocks 701. The hardness of the reinforcing surfaces 712 is 60 HRC after heat treatment.

[0018] When working, please refer to Figures 1 to 6 The positioning hole 601 first contacts the conical straightening block 710 at the upper end of the positioning pin body 2, and the initial alignment is completed by the conical guide and the polyurethane buffer pad 711. After the workpiece 6 is installed in place, the operator moves the locking block 502 upward to the upper end of the locking groove 501, and then moves it to the left or right. At this time, the lower end of the positioning pin body 2 is screwed into the positioning groove 706 of the movable block 703 through the thread, compressing the hydraulic oil stored in the locking cavity 705 and increasing the oil pressure. The high-pressure hydraulic oil is transmitted through the positioning oil passage 707. When the workpiece 6 is locked, the positioning block 701 is pushed outward and contacts the positioning hole 601 in the straightening groove 702. At the same time, when the locking block 502 moves, it drives the limit block 902 to compress the limit spring 903. After it reaches the position, the electromagnet 904 attracts the limit block 902, and the limit switch 905 provides feedback on the locked state. The self-locking thread ensures that the regulating oil port 708 is sealed to maintain the oil pressure, while the ball bearing 802 reduces the sliding friction of the positioning pin body 2. The whole structure is made of high-strength alloy structural steel and hardened surface to ensure operational stability.

[0019] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A device for moving and positioning a positioning pin, characterized in that, The system includes a mounting base (1) and a positioning pin body (2). A base plate (3) is installed below each of the mounting bases (1). Mounting holes (4) are vertically opened on each of the mounting bases (1). Each of the positioning pin bodies (2) is slidably connected to the mounting holes (4). Each of the mounting bases (1) has a locking groove (501) on its side. Each of the locking grooves (501) is connected to the mounting holes (4). Each of the locking grooves (501) has a locking block (502) slidably connected to it. The locking block (502) is connected to the positioning pin body (2). Each of the locking grooves (501) is I-shaped. A workpiece is mounted on each of the mounting bases (1). 6) The lower end face of the workpiece (6) is provided with a plurality of positioning holes (601). The opening position of the plurality of positioning holes (601) is coaxial with the plurality of mounting holes (4). The upper diameter of the plurality of positioning pin bodies (2) is smaller than the diameter of the positioning holes (601). The upper end of the plurality of positioning pin bodies (2) is provided with positioning components. The positioning components are provided with positioning blocks (701). The upper circumference of the plurality of positioning pin bodies (2) is provided with a plurality of correction grooves (702). The plurality of positioning blocks (701) are slidably connected in the plurality of correction grooves (702). After the workpiece (6) is installed in place, the plurality of positioning blocks (701) are driven to undergo radial displacement by the positioning components. The positioning component includes a movable block (703), and each of the plurality of mounting seats (1) is vertically provided with a sliding groove (704). The plurality of sliding grooves (704) are respectively located at the lower end of the plurality of mounting seats (1). The plurality of movable blocks (703) are rectangular and are slidably connected in the sliding grooves (704). Each of the plurality of movable blocks (703) is provided with a locking cavity (705) and a positioning groove (706). The plurality of locking cavities (705) and the plurality of positioning grooves (706) are connected, and the plurality of locking cavities (705) are located below the plurality of positioning grooves (706). The lower end of the plurality of positioning pin bodies (2) is threadedly connected in the plurality of positioning grooves (706). Each of the plurality of positioning pin bodies (2) is coaxially provided with a positioning oil passage (707). The upper and lower ends of the plurality of positioning oil passages (707) are respectively connected to the locking cavity (705) and the plurality of correction grooves (702). One end of each of the mounting bases (1) having a locking groove (501) is set in an arc shape. Multiple limiting grooves (901) are provided on the end face of the mounting bases (1) having the locking groove (501). The multiple limiting grooves (901) are respectively connected to the left and right ends of the locking groove (501). Multiple locking blocks (502) are slidably connected to the limiting blocks (902). Multiple locking blocks (502) are also fitted with limiting springs (903). The two ends of the multiple limiting springs (903) are respectively connected to the multiple locking blocks (502) and the multiple limiting blocks (902).

2. The positioning device for a positioning pin according to claim 1, characterized in that: Each of the multiple movable blocks (703) has an adjustment port (708) on its lower end face. The multiple adjustment ports (708) are connected to the locking cavity (705). The multiple adjustment ports (708) are internally threaded with self-locking screws (709).

3. The positioning device for a positioning pin according to claim 1, characterized in that: Multiple annular raceways (801) are evenly distributed on the inner sidewalls of the multiple mounting holes (4). Multiple balls (802) are rolled in the multiple annular raceways (801). The multiple balls (802) are made of high-hardness bearing steel. The multiple positioning pin bodies (2) are rolled in connection with the multiple balls (802) in the multiple mounting holes (4).

4. The positioning device for a positioning pin according to claim 1, characterized in that: Electromagnets (904) are installed on the side walls of the multiple limiting grooves (901) on both sides, and limit switches (905) are installed on the multiple mounting bases (1). The multiple limit switches (905) are located on the side of the limiting groove (901) away from the locking groove (501).

5. The moving positioning device for a positioning pin according to claim 1, characterized in that: The multiple positioning pin bodies (2) and multiple positioning blocks (701) are all made of any one of the following materials: high carbon steel, alloy structural steel and bearing steel. The multiple positioning pin bodies (2) and multiple positioning blocks (701) have a reinforcing surface (712) on their outer surface. The reinforcing surface (712) is heat-treated and the hardness of the reinforcing surface (712) after processing is between 50HRC and 65HRC.

6. The moving positioning device for a positioning pin according to claim 1, characterized in that: Each of the locating pins has a correction block (710) installed on its upper surface. Each correction block (710) is conical in shape and has a polyurethane buffer pad (711) embedded in its head.

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