Hydraulic clamping device for drilling of pin rail of underground scraper conveyor

Abstract

The utility model relates to the technical field of machining and clamps, in particular to a hydraulic clamping device for drilling a pin rail of an underground scraper conveyor. The pin rail of the underground scraper conveyor has the production characteristics that the machining is simpler, the production batch is large, the requirement on high efficiency is high, the efficiency and the precision in the current drilling processing are low, and no processing equipment meeting the requirement on high-efficiency production exists. The hydraulic clamping device for drilling the pin rail of the underground scraper conveyor overcomes the defects in the prior art, is composed of the left clamp body, the middle clamp body and the right clamp body, effectively positions the pin rail through components on the support bodies, and completes rapid clamping through hydraulic pressure by means of a rotating lever mechanism. And the high-precision, high-efficiency and batch production requirements of drilling machining of the pin rail of the scraper conveyor are completely met. The numerical control drilling machine is simple and compact in structure, easy and convenient to operate, high in reliability and high in positioning precision, workpieces are rapidly assembled and disassembled through hydraulic pressure, numerical control drilling machining is achieved, and machining efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing and clamps, and is a process equipment for high-efficiency processing of pin rail drilling, in particular to a hydraulic clamping device for processing pin rail drilling of an underground scraper conveyor. Background Art

[0002] The pin rail of the underground scraper conveyor is installed on the rail seat on the side of the middle groove of the scraper conveyor. It is the walking track of the coal mining machine. The rail seat and the pin rail are connected by a rack pin. It is a key component of the scraper conveyor. Its structure now mostly uses forged blanks, with many curved surfaces and complex shapes. The only processing step is drilling, and the rest is mainly heat treatment and surface quenching. Its production characteristics are simple machining, large production batches, and high efficiency. At present, the main methods for drilling holes in the pin rail of the scraper conveyor are drilling with marking or drilling jigs on a radial drilling machine, and drilling on a CNC boring and milling machine. Ordinary drilling machines have low processing accuracy and efficiency. Although CNC boring and milling machines use CNC tools with high drilling efficiency, they use manual clamping such as pressure plates when clamping the workpiece, which is inefficient and difficult to meet the requirements of efficient production. Therefore, a high-precision, simple-to-operate, and efficient production-satisfying equipment is needed to solve the efficient production problem of the scraper conveyor pin rail drilling process. Summary of the Invention

[0003] The purpose of the utility model is to provide a hydraulic clamping device for drilling holes in the pin rails of an underground scraper conveyor, so as to solve the deficiencies in the prior art and meet the requirements of high precision, high efficiency and batch production of drilling holes in the pin rails of a scraper conveyor.

[0004] The technical solution adopted by the present invention is: the hydraulic clamping device for the drilling processing of the pin rail of the underground scraper conveyor is composed of a left clamping concrete 1, a middle clamping concrete 2, and a right clamping concrete 3. The left clamping concrete 1 and the right clamping concrete 3 have the same structure and are symmetrically arranged on the left and right sides. The left clamping concrete 1, the middle clamping concrete 2, and the right clamping concrete 3 are mounted on the machine tool workbench and fixed in position with a positioning key 26. The left clamping concrete 1 and the right clamping concrete 3 are respectively equipped with an oil cylinder 8, a clamping support 12, a support frame 15, and a positioning key 26 on the left support 5 and the right support 7, which are fixed with screws 24. The positioning pin 25 positions the support frame 15. The fork seat 10 is installed on the top of the piston rod of the oil cylinder 8 through the end thread. The position is adjusted according to the clamping requirements and then tightened with a lock nut 9. The connecting plate 11 is installed on the clamping support 12 with an axle pin 22 and an elastic retaining ring 23. The pressure plate 13 is connected to the fork seat 10 and the connecting plate with an axle pin 22 and an elastic retaining ring 23. The plates 11 are connected together to form a rotating lever mechanism. By extending and retracting the piston rod of the oil cylinder 8, the end of the pressure plate 13 can be pressed and loosened against the pin rail workpiece 4, completing the loading and unloading of the pin rail workpiece 4. The support plate 14 is mounted on the support frame 15 and is used to support the tooth bottom positioning platforms at both ends of the pin rail workpiece 4, positioning the pin rail workpiece 4 up and down and ensuring the pin rail workpiece 4 is pressed tightly during drilling. The positioning rod 21 is threadedly connected to the lower end of the support frame 15 to position the pin rail workpiece 4 front and back. The middle clamp body 2 is mounted on the middle support 6 with a longitudinal bracket 16, a support seat 20, and a positioning key 26, which are fixed with screws 24. The limit block 17 is mounted on the longitudinal bracket 16 to position the pin rail workpiece 4 left and right. The bolt adjustment rod 18 is threadedly mounted on the support seat 20 to provide auxiliary support for the bottom surface of the auxiliary rail plate of the pin rail workpiece 4 and is locked with a lock nut 19.

[0005] The working principle of the rotating lever mechanism: when the piston rod of the oil cylinder 8 is extended, the connecting plate 11 rotates inward along the upper end shaft hole of the clamping support 12, and the pressure plate 13 rotates along the upper end shaft hole of the connecting plate 11. When the upper end of the connecting plate 11 reaches the highest point, it no longer rotates and becomes the fulcrum of the pressure plate 13 to form a lever structure. The left end of the pressure plate 13 continues to extend with the piston rod of the oil cylinder 8. Under the action of the lever, the right end of the pressure plate 13 continues to descend until the tooth tops at both ends of the pin rail workpiece 4 are clamped, realizing the clamping function of the hydraulic clamping device; on the contrary, when the piston rod of the oil cylinder 8 is retracted, the right end of the pressure plate 13 rises under the action of the lever to release the clamping function, and as the connecting plate 11 rotates outward, the right end of the pressure plate 13 moves outward to the extreme position while rising, meeting the installation space of the pin rail workpiece 4, completing the rapid loading and unloading of the pin rail workpiece 4.

[0006] Working principle of the hydraulic clamping device for drilling holes for pin rails of underground scraper conveyors: adjust the positions of the left clamping body 1, the middle clamping body 2, and the right clamping body 3 according to the specific size of the pin rail workpiece 4, fix it on the workbench of the CNC boring and milling machine, and adjust the bolt adjustment rod 18 in the middle clamping body 2 to lock it. Install the pin rail workpiece 4 on the hydraulic clamping device for drilling holes for pin rails of scraper conveyors, place the bottom surfaces of the teeth supporting the pin rail workpiece 4 at both ends on the support plates 14 of the left clamping body 1 and the right clamping body 3, and use the positioning rod 21 to limit the front and rear movement of the pin rail workpiece 4. Position, use the limit block 17 in the middle clamp body 2 to limit the pin rail workpiece 4 to the left and right positions, extend the piston rod of the rodless chamber of the oil cylinder 8, and push the head of the lower pressure plate 13 to move inward and downward by the rotating lever mechanism until the tooth tops at both ends of the pin rail workpiece 4 are pressed to lock the oil cylinder 8 and start drilling. After the processing is completed, the oil cylinder 8 is unlocked and the piston rod of the rod chamber is recovered. Under the action of the rotating lever mechanism, the head of the lower pressure plate 13 moves upward and outward to the limit position, and the pin rail workpiece 4 is disassembled. The above steps are repeated to continuously perform the drilling processing of the pin rail workpiece 4.

[0007] The beneficial effects of the utility model are: simple and compact structure, easy operation, high reliability, high positioning accuracy, rapid loading and unloading of workpieces using hydraulic pressure, and CNC drilling processing, which greatly improves processing efficiency. It is particularly suitable for high-precision, high-efficiency and mass production of scraper conveyor pin rail drilling processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0009] Figure 1 This is a schematic diagram of the application of a hydraulic clamping device for drilling holes in a pin rail of an underground scraper conveyor according to the utility model;

[0010] Figure 2 This is a structural diagram of a hydraulic clamping device for drilling holes in a pin rail of an underground scraper conveyor according to the utility model;

[0011] Figure 3 This is a schematic diagram of the assembly and disassembly of a hydraulic clamping device for drilling holes in a pin rail of an underground scraper conveyor according to the utility model;

[0012] In the figure: 1. Left clamping concrete, 2. Middle clamping concrete, 3. Right clamping concrete, 4. Pin rail workpiece, 5. Left support, 6. Middle support, 7. Right support, 8. Cylinder, 9. Lock nut, 10. Fork seat, 11. Connecting plate, 12. Clamping support, 13. Pressing plate, 14. Support plate, 15. Support frame, 16. Longitudinal bracket, 17. Limit block, 18. Support seat, 19. Pin nut, 20. Bolt adjustment rod, 21. Positioning rod, 22. Pin shaft, 23. Elastic retaining ring, 24. Screw, 25. Positioning pin, 26. Positioning key. DETAILED DESCRIPTION

[0013] like Figure 1 As shown, the hydraulic clamping device for drilling holes of the pin rail of the underground scraper conveyor consists of a left clamping body 1, a middle clamping body 2, and a right clamping body 3. The left clamping body 1 and the right clamping body 3 have the same structure and are arranged symmetrically on the left and right sides. The left clamping body 1, the middle clamping body 2, and the right clamping body 3 are mounted on the machine tool workbench and fixed in position with a positioning key 26. By adjusting the lateral position of the left clamping body 1 and the right clamping body 3, pin rails of various models and specifications can be clamped to complete the drilling process.

[0014] like Figure 2 As shown, the left clamp body 1 and the right clamp body 3 are composed of the left support 5 and the right support 7, the oil cylinder 8, the lock nut 9, the fork seat 10, the connecting plate 11, the clamping support 12, the pressure plate 13, the support plate 14, the support frame 15, the positioning rod 21, the pin 22, the elastic retaining ring 23, the screw 24, the positioning pin 25, and the positioning key 26. The left clamp body 1 and the right clamp body 3 are respectively installed with the oil cylinder 8, the clamping support 12, the support frame 15, and the positioning key 26 on the left support 5 and the right support 7, which are fixed with the screw 24. The positioning pin 25 positions the support frame 15. The fork seat 10 is installed on the top of the piston rod of the oil cylinder 8 through the end thread. The position is adjusted according to the clamping requirements and then fastened with the lock nut 9. The connecting plate 11 is installed on the clamping support 12 with the shaft pin 22 and the elastic retaining ring 23. The pressure plate 13 is connected to the fork seat 10 and the connecting plate with the shaft pin 22 and the elastic retaining ring 23. 11 are connected together to form a rotating lever mechanism structure. By extending and retracting the piston rod of the oil cylinder 8, the end of the pressure plate 13 can be pressed and loosened on the pin rail workpiece 4 to complete the loading and unloading of the pin rail workpiece 4; the support plate 14 is installed on the support frame 15, which is used to support the tooth bottom positioning platforms at both ends of the pin rail workpiece 4, position the pin rail workpiece 4 up and down and ensure that the pin rail workpiece 4 is pressed during drilling. The positioning rod 21 is threadedly connected to the lower end of the support frame 15 to position the pin rail workpiece 4 front and back.

[0015] The middle clamp body 2 is composed of a longitudinal bracket 16, a limit block 17, a bolt adjustment rod 18, a locking nut 19, and a support seat 20. The longitudinal bracket 16, the support seat 20, and the positioning key 26 are installed on the middle support 6 and fixed with screws 24. The limit block 17 is installed on the longitudinal bracket 16 to position the pin rail workpiece 4 left and right. The bolt adjustment rod 18 is threadedly installed on the support seat 20 to auxiliary support the bottom surface of the auxiliary rail plate of the pin rail workpiece 4 and is locked with a locking nut 19.

[0016] The working principle of the rotary lever mechanism: The rotary lever mechanism consists of an oil cylinder 8, a lock nut 9, a fork seat 10, a connecting plate 11, a clamping support 12, a pressure plate 13, an axle pin 22 and an elastic retaining ring 23. When the piston rod of the oil cylinder 8 extends, the connecting plate 11 rotates inward along the shaft hole at the upper end of the clamping support 12. At the same time, the pressure plate 13 rotates along the shaft hole at the upper end of the connecting plate 11. The left end of the pressure plate 13 rises and the right end falls. When the upper end of the connecting plate 11 reaches the highest point, it no longer rotates and becomes the fulcrum of the pressure plate 13 to form a lever structure. The left end of the pressure plate 13 continues to rise with the piston rod of the oil cylinder 8. Under the action of the lever, the pressure plate The right end of 13 continues to descend until it presses the tooth tops at both ends of the pin rail workpiece 4, completing the clamping function of the hydraulic clamping device; on the contrary, when the piston rod of the oil cylinder 8 is retracted, the left end of the pressure plate 13 descends and the right end rises under the action of the lever to release the clamping function, and as the connecting plate 11 rotates outward, the right end of the pressure plate 13 moves outward to the extreme position while rising, so that the installation space of the hydraulic clamping device for underground scraper conveyor pin rail drilling processing is larger than the length of the pin rail workpiece 4, meeting the installation space of the pin rail workpiece 4, and can ensure and complete the fast and smooth loading and unloading of the pin rail workpiece 4.

[0017] like Figure 3 As shown, the working principle of the hydraulic clamping device for drilling holes for the pin rail of an underground scraper conveyor is as follows: the positions of the left clamping body 1, the middle clamping body 2, and the right clamping body 3 are adjusted according to the specific size of the pin rail workpiece 4, fixed on the workbench of the CNC boring and milling machine, and the bolt adjustment rod 18 in the middle clamping body 2 is adjusted and locked, the pin rail workpiece 4 is mounted on the hydraulic clamping device for drilling holes for the scraper conveyor pin rail, the bottom surfaces of the teeth supporting the two ends of the pin rail workpiece 4 are placed on the supporting plates 14 of the left clamping body 1 and the right clamping body 3, and the positioning rod 21 is used to limit the position of the pin rail workpiece 4. Before and after positions, use the limit block 17 in the middle clamp body 2 to limit the left and right positions of the pin rail workpiece 4, extend the piston rod of the rodless cavity of the oil cylinder 8, and push the head of the lower pressure plate 13 inward and downward by the rotating lever mechanism until the tooth tops at both ends of the pin rail workpiece 4 are pressed to lock the oil cylinder 8, and start drilling. After the processing is completed, the oil cylinder 8 is unlocked and the piston rod of the rod cavity is recovered. Under the action of the rotating lever mechanism, the head of the lower pressure plate 13 moves upward and outward to the limit position, and the pin rail workpiece 4 is removed. The above steps are repeated to continuously perform the drilling processing of the pin rail workpiece 4.

Claims

1. A hydraulic clamping device for drilling holes in a pin rail of an underground scraper conveyor, characterized by: It consists of a left clamping concrete body (1), a middle clamping concrete body (2), and a right clamping concrete body (3). The left clamping concrete body (1) and the right clamping concrete body (3) have the same structure and are arranged symmetrically on the left and right sides. The left clamping concrete body (1), the middle clamping concrete body (2), and the right clamping concrete body (3) are installed on the machine tool workbench and fixed in position by a positioning key (26).

2. The hydraulic clamping device for drilling holes in a shaft scraper conveyor according to claim 1, characterized in that: The left clamp body (1) and the right clamp body (3) are respectively installed with an oil cylinder (8), a pressing support (12), a support frame (15), and a positioning key (26) on the left support (5) and the right support (7), and are fixed with screws (24). The positioning pin (25) positions the support frame (15). The fork seat (10) is installed on the top of the piston rod of the oil cylinder (8) through the end thread and is fastened with a lock nut (9) after adjusting the position according to the pressing requirements. The connecting plate (11) is installed on the pressing support (12) with a shaft pin (22) and a circlip (23). The pressure plate (13) is fixed with a shaft pin (22) and a circlip (23). It is connected with the fork seat (10) and the connecting plate (11) to form a rotating lever mechanism. By extending and retracting the piston rod of the oil cylinder 8, the end of the pressure plate (13) can be pressed and loosened on the pin rail workpiece (4), completing the loading and unloading of the pin rail workpiece (4); the support plate (14) is installed on the support frame (15) and is used to support the tooth bottom positioning platforms at both ends of the pin rail workpiece (4), positioning the pin rail workpiece (4) up and down and ensuring that the pin rail workpiece (4) is pressed during drilling. The positioning rod (21) is connected to the lower end of the support frame (15) with a thread to position the pin rail workpiece (4) front and back.

3. The hydraulic clamping device for drilling holes in a shaft scraper conveyor according to claim 1, characterized in that: The middle clamp body (2) is equipped with a longitudinal bracket (16) and a support seat (20) on the middle support (6), which are fixed with screws (24). The limit block (17) is installed on the longitudinal bracket (16) to position the pin rail workpiece (4) left and right. The bolt adjustment rod (18) is installed on the support seat (20) with a thread to assist in supporting the bottom surface of the auxiliary rail plate of the pin rail workpiece (4) and is locked with a locking nut (19).

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