Elastic tailstock for thermal spraying of slender piston rod

Abstract

The utility model discloses an elastic tailstock for thermal spraying of a slender piston rod, which relates to the technical field of machine tool tailstocks and comprises a tailstock main body and a supporting seat, the supporting seat sliding on a lathe track is fixed at the bottom of the tailstock main body, and a clamping cylinder is sleeved in the tailstock main body in a sliding manner. The front end of the clamping cylinder is provided with a tip abutting against a shaft piece, the other end of the clamping cylinder is connected with a lead screw extending to the outer side of the tailstock body, and an oil adding assembly is arranged above the clamping cylinder and located in the tailstock body. Force generated by expansion during thermal spraying of the piston rod is eliminated through the elastic assembly, defective products caused by deformation and bending of the piston rod can be prevented, the spraying process quality of the piston rod is high, meanwhile, the lead screw is rotated to drive the clamping barrel to move, lubricating oil is injected between the clamping barrel and the piston rod in a large area, lubricating oil adding is more convenient, and the spraying quality of the piston rod is improved. In this way, abrasion between the lead screw and the clamping cylinder is reduced, and the service life of the lead screw and the clamping cylinder is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of machine tool tailstock technology, specifically an elastic tailstock for thermal spraying of a slender piston rod. Background Technology

[0002] In machining equipment, lathes, grinding machines and other machines must be equipped with tailstocks for mounting and positioning workpieces. Traditionally, tailstocks are controlled by manually turning a handwheel to drive a lead screw, thereby controlling the center's advance and retreat. The tailstock is equipped with a manual clamping device to fix the position of the center after clamping the workpiece.

[0003] Slender piston rods are an important component of long-stroke hydraulic cylinders and are widely used in shipbuilding, water conservancy, nuclear power and other fields. To improve the surface performance of slender piston rods, thermal spraying is generally used to prepare anti-corrosion and wear-resistant alloy or ceramic coatings on their surface. However, piston rods are subject to thermal expansion and contraction. For slender piston rods, the dimensional changes can even reach tens of millimeters. This not only easily damages the tailstock, but in severe cases, the workpiece may fall off the machine tool, causing a major accident. Furthermore, the friction between the tailstock and the adjusting handle due to continuous rotation causes lubricant loss, which in turn leads to an increase in the friction between the machine tool tailstock and the adjusting handle. Over time, the machine tool tailstock is prone to damage, reducing its durability. Therefore, an elastic tailstock for thermal spraying of slender piston rods is proposed. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide an elastic tailstock for thermal spraying of a slender piston rod, so as to solve the technical problem mentioned in the background that expansion during thermal spraying of the piston rod leads to deformation of the piston rod body.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an elastic tailstock for thermal spraying of a slender piston rod, comprising a tailstock body and a support seat. The bottom of the tailstock body is fixed with a support seat that slides on a lathe track. A clamping cylinder is slidably sleeved inside the tailstock body. The front end of the clamping cylinder is fitted with a tip that abuts against a shaft. The other end of the clamping cylinder is connected to a lead screw that extends to the outside of the tailstock body. An oiling component is provided above the clamping cylinder inside the tailstock body. An elastic component is fitted on the outer wall of the lead screw on one side of the end of the clamping cylinder.

[0006] The oiling assembly includes a pressure cylinder located above the clamping cylinder and fixed inside the tailstock body. A piston is installed inside the pressure cylinder. A connecting rod extending to the outside of the end of the pressure cylinder is fixed to the end of the pressure cylinder. An inverted Y-frame for spraying lubricating oil onto the outer wall of the lead screw is fixed to the end of the connecting rod. Two sets of nozzles are installed at the lower part of the inverted Y-frame. A ball head rod is longitudinally slidable inside the inverted Y-frame. A return spring is sleeved on the outer wall of the ball head rod inside the inverted Y-frame. An F-seat fixed to the end face of the clamping cylinder is located directly below the return spring.

[0007] The elastic component includes a positioning ring connected to the outer wall of the lead screw by bearings. The outer wall of the lead screw is fitted with a cover that is fixed to the end face of the tailstock body by bolts. Multiple sets of stepped elastic elements are fixed to the end face of the positioning ring near the cover. The multiple sets of stepped elastic elements are distributed at equal intervals along the curved contour of the positioning ring.

[0008] As a preferred technical solution, a lubricating oil tank is installed on the top of the tailstock body, and an oil delivery pipe extending into the tailstock body and communicating with the pressure cylinder is provided on one side of the lubricating oil tank. An oil filling port is provided on the top of the lubricating oil tank.

[0009] As a preferred technical solution, a through circular channel is provided in the main body of the tailstock, and the size of the circular channel corresponds to the clamping cylinder. Two sets of constraint blocks are fixed on the outer wall of the clamping cylinder. The inner wall of the circular channel is reserved with a stroke groove for the constraint blocks to slide. An internal thread corresponding to the lead screw is provided inside the clamping cylinder.

[0010] As a preferred technical solution, the inner wall of the circular channel is provided with a clearance groove for fixing the oiling component, the top of the tailstock body is provided with a compression screw shank for lowering the compression ball head rod, and the top of the tailstock body is provided with a threaded hole that matches the compression screw shank.

[0011] As a preferred technical solution, a channel is reserved in the inverted Y frame for the ball head rod to slide up and down, and the return spring is assembled in the channel with its two ends fixed to the outer wall of the ball head rod and the inner wall of the channel, respectively.

[0012] As a preferred technical solution, a rocker arm is fitted on the outer wall of the lead screw at the position outside the tailstock body, and no thread is opened at the contact position between the lead screw and the positioning ring.

[0013] As a preferred technical solution, it also includes an oil outlet pipe, which is a telescopic pipe, and a one-way check valve is installed inside the end of the oil outlet pipe and the oil delivery pipe near the pressure cylinder.

[0014] In summary, the present invention has the following main advantages:

[0015] This invention eliminates the force generated by the expansion of the piston rod during hot spraying using an elastic component, which can prevent defective products caused by piston rod deformation and bending, resulting in a higher quality piston rod spraying process. At the same time, the rotating screw drives the clamping cylinder to move, allowing lubricating oil to be injected into the space between the two, making it easier to add lubricating oil. This locking mechanism reduces wear between the two, extending the service life of the screw and the clamping cylinder. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention;

[0018] Figure 3 This is a perspective view of the internal structure of the support base of this utility model;

[0019] Figure 4 This is a structural diagram of the clamping cylinder and elastic component of this utility model;

[0020] Figure 5 This is a schematic diagram of the oiling component structure of this utility model.

[0021] In the diagram: 100, Tailstock body; 101, Circular channel; 102, Stroke groove; 103, Clearance groove; 104, Extrusion screw shank; 200, Oiling assembly;

[0022] 110. Support base; 120. Clamping cylinder; 121. Constraint block; 130. Center point; 140. Lead screw; 150. Elastic component; 151. Stepped elastic element; 152. Positioning ring; 153. Cover;

[0023] 210. Lubricating oil tank; 220. Pressure cylinder; 230. Connecting rod; 240. Piston; 250. Oil supply pipe; 260. Oil outlet pipe; 270. Inverted Y frame; 271. Nozzle; 280. Ball head rod; 281. Return spring; 290. F seat. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0025] The embodiments of this utility model will be described below based on its overall structure.

[0026] A flexible tailstock for thermal spraying of a slender piston rod, such as Figures 1 to 5 As shown, the device includes a tailstock body 100 and a support seat 110. The bottom of the tailstock body 100 is fixed with a support seat 110 that slides on the lathe track. A clamping sleeve 120 is slidably sleeved inside the tailstock body 100. The front end of the clamping sleeve 120 is equipped with a tip 130 that abuts against the shaft. The other end of the clamping sleeve 120 is connected to a lead screw 140 that extends to the outside of the tailstock body 100. An oiling component 200 is provided above the clamping sleeve 120 inside the tailstock body 100. An elastic component 150 is installed on the outer wall of the lead screw 140 on one side of the end of the clamping sleeve 120.

[0027] The oiling assembly 200 includes a pressure cylinder 220 located above the clamping cylinder 120 and fixed inside the tailstock body 100. A piston 240 is installed inside the pressure cylinder 220. A connecting rod 230 extending to the outside of the end of the pressure cylinder 220 is fixed to the end of the pressure cylinder 220. An inverted Y-frame 270 for spraying lubricating oil onto the outer wall of the lead screw 140 is fixed to the end of the connecting rod 230. Two sets of nozzles 271 are installed at the lower part of the inverted Y-frame 270. A ball head rod 280 is longitudinally slidably provided inside the inverted Y-frame 270. A return spring 281 is sleeved on the outer wall of the ball head rod 280 inside the inverted Y-frame 270. An F-seat 290 fixed to the end face of the clamping cylinder 120 is provided directly below the return spring 281.

[0028] The elastic component 150 includes a positioning ring 152 connected to the outer wall of the lead screw 140 by bearings. The outer wall of the lead screw 140 is fitted with a cover 153 which is fixed to the end face of the tailstock body 100 by bolts. The cover 153 has a matching round hole at the contact position with the lead screw 140. Multiple sets of stepped elastic elements 151 are fixed to the end face of the positioning ring 152 near the cover 153. The multiple sets of stepped elastic elements 151 are evenly distributed along the curved contour of the positioning ring 152.

[0029] The top of the tailstock body 100 is equipped with a lubricating oil tank 210, and one side of the lubricating oil tank 210 is provided with an oil delivery pipe 250 extending into the tailstock body 100 and connected to the pressure cylinder 220. One side of the inverted Y frame 270 is provided with multiple sets of oil outlet pipes 260 connected to the pressure cylinder 220.

[0030] An external force is applied to the lead screw 140 to make it rotate. The clamping sleeve 120 sleeved on its outer wall gradually extends out from the tailstock body 100, so that the tip 130 abuts against the end face of the piston rod to be processed, which can assist the machine tool to complete the processing purpose. At the same time, the tip 130 can generate a lateral thrust on the clamping sleeve 120, causing the lead screw 140 to move slightly to the right. Since the positioning ring 152 rotates at a fixed point on the outer wall of the lead screw 140, it will move synchronously with the positioning ring 152. At this time, the stepped elastic element 151 deforms to allow the lead screw 140 to move slightly, so as to cope with the expansion of the piston rod due to high temperature during processing. The expansion force is offset by the deformation of the stepped elastic element 151, which can prevent the piston rod to be bent and ensure the quality of the piston rod processing.

[0031] When adding lubricating oil to the outer wall of the lead screw 140, the lead screw 140 can be rotated so that its clamping cylinder 120 extends into the tailstock body 100 until it can no longer go deeper. At this time, the horizontally positioned F seat 290 is located directly below the ball head rod 280. The operator only needs to rotate the extrusion screw 104 (until the extrusion screw 104 can no longer be lowered) to extrude the ball head rod 280 and lower it. At this time, the bottom of the ball head rod 280 is inserted into the F seat 290, and the top is flush with the inverted Y frame 270. At this time, the lead screw 140 can be rotated so that the clamping cylinder 120 extends out of the tailstock body 100. The F seat 290 drives the inverted Y frame 270 to move synchronously, and the inverted Y frame 270 pushes the connecting rod 230 to move laterally, which is then connected to the piston 2. The lubricating oil in the pressure cylinder 220 is squeezed into the oil outlet pipe 260, and finally into the inverted Y frame 270 and discharged through the nozzle 271, and finally sprayed onto the outer wall of the lead screw 140. When the pressure cylinder 220 enters the tailstock body 100 along the outer wall of the lead screw 140, it will drive the connecting rod 230 and the piston 240 to return to their original positions, so that the lubricating oil in the lubricating oil tank 210 is drawn into the pressure cylinder 220 through the oil delivery pipe 250, which prepares for the next addition of lubricating oil. When the pressure cylinder 220 enters the tailstock body 100 along the lead screw 140, it will fully mix the lubricating oil on the outside of the lead screw 140, thereby reducing the friction loss between the two and extending its service life.

[0032] Please refer to this carefully. Figure 1 , Figure 2 and Figure 3 The top of the lubricating oil tank 210 is equipped with an oil filling port.

[0033] Lubricating oil can be added to the lubricating oil tank 210 through the oil filling port, making it convenient to add lubricating oil between the lead screw 140 and the clamping cylinder 120.

[0034] Please refer to this carefully. Figure 2 , Figure 3 and Figure 4 The tailstock body 100 has a through circular channel 101, and the size of the circular channel 101 corresponds to the clamping cylinder 120. Two sets of constraint blocks 121 are fixed on the outer wall of the clamping cylinder 120. The inner wall of the circular channel 101 has a stroke groove 102 for the constraint blocks 121 to slide. The clamping cylinder 120 has an internal thread corresponding to the lead screw 140.

[0035] By utilizing the cooperation of the constraint block 121 and the stroke groove 102, the clamping cylinder 120 moves laterally along the circular channel 101 when the lead screw 140 rotates, which can drive the center point 130 to extend and abut against the end face of the shaft, thus assisting the machine tool in completing the machining of the shaft.

[0036] Please refer to this carefully. Figure 3The inner wall of the circular channel 101 is provided with a relief groove 103 for fixing the oil filling component 200. The top of the tailstock body 100 is provided with a compression shank 104 for lowering the compression ball head rod 280. The top of the tailstock body 100 is provided with a threaded hole that matches the compression shank 104.

[0037] The oil supply component 200 is fixedly installed in the tailstock body 100 by the clearance groove 103, and will not interfere with the lateral movement of the clamping cylinder 120.

[0038] When adding lubricating oil to the outer wall of the lead screw 140, the extrusion shank 104 can be manually rotated to extend into the threaded hole, and the extrusion ball head rod 280 can move in conjunction with the clamping cylinder 120 to complete the purpose of adding lubricating oil.

[0039] Please refer to this carefully. Figure 5 The inverted Y frame 270 has a reserved channel for the ball head rod 280 to slide up and down. The return spring 281 is assembled in the channel and its two ends are fixed to the outer wall of the ball head rod 280 and the inner wall of the channel, respectively.

[0040] The channel separates the ball joint 280 from the lubricating oil entering the inverted Y frame 270, avoiding interference. When the ball joint 280 is lowered, it compresses the return spring, so that the return force can be provided to raise the ball joint 280 back to its initial state.

[0041] Please refer to this carefully. Figure 1 and Figure 2 A crank is fitted on the outer wall of the lead screw 140 at the position outside the tailstock body 100, and no thread is opened at the contact position between the lead screw 140 and the positioning ring 152.

[0042] The crank handle allows for easy application of external force to the lead screw 140 by hand, causing it to rotate and drive the tip 130 to contact the end face of the shaft.

[0043] Please refer to this carefully. Figure 2 and Figure 5 It also includes an oil outlet pipe 260, which is a telescopic pipe. One-way check valve plates are installed inside the oil outlet pipe 260 and the oil delivery pipe 250 near the pressure cylinder 220.

[0044] This allows the length of the oil outlet pipe 260 to extend and retract as the connecting rod 230 moves, without hindering the movement of the connecting rod 230. At the same time, it can drive the lubricating oil inside the pressure cylinder 220 to be discharged to the outer wall of the lead screw 140.

[0045] The one-way check valve plates in the oil outlet pipe 260 and the oil delivery pipe 250 can spray the lubricating oil in the lubricating oil tank 210 onto the outer wall of the lead screw 140 through the pressure cylinder 220 because the connecting rod 230 opens alternately to the left or right, so that the lubricating oil in the lubricating oil tank 210 can be sprayed onto the outer wall of the lead screw 140, making its movement between the lead screw and the clamping cylinder 120 smooth and with less friction.

[0046] When in use, an external force is applied to the lead screw 140 to make it rotate. The clamping sleeve 120 sleeved on its outer wall gradually extends out from the tailstock body 100, so that the tip 130 abuts against the end face of the piston rod to be processed, which can assist the machine tool to complete the processing purpose. At the same time, the tip 130 can generate a lateral thrust on the clamping sleeve 120, causing the lead screw 140 to move slightly to the right. Since the positioning ring 152 rotates at a fixed point on the outer wall of the lead screw 140, it will move synchronously with the positioning ring 152. At this time, the stepped elastic element 151 deforms to allow the lead screw 140 to move slightly, so as to cope with the expansion of the piston rod due to high temperature during processing. The expansion force is offset by the deformation of the stepped elastic element 151, which can prevent the piston rod to be bent and ensure the quality of the piston rod processing.

[0047] When adding lubricating oil to the outer wall of the lead screw 140, the lead screw 140 can be rotated so that its clamping cylinder 120 extends into the tailstock body 100 until it can no longer go deeper. At this time, the horizontally positioned F seat 290 is located directly below the ball head rod 280. The operator only needs to rotate the extrusion screw 104 (until the extrusion screw 104 can no longer be lowered) to extrude the ball head rod 280. At this time, the bottom of the ball head rod 280 is inserted into the F seat 290, and the top is flush with the inverted Y frame 270. The lead screw 140 can then be rotated so that the clamping cylinder 120 extends out of the tailstock body 100. The F seat 290 drives the inverted Y frame 270 to move synchronously, and the inverted Y frame 270 pushes the connecting rod 230 to move laterally. The piston 240 then compresses the lubricating oil in the pressure cylinder 220. The oil enters the outlet pipe 260 and finally enters the inverted Y frame 270, where it is discharged through the nozzle 271 and sprayed onto the outer wall of the lead screw 140. When the pressure cylinder 220 enters the tailstock body 100 along the outer wall of the lead screw 140, it drives the connecting rod 230 and piston 240 to return to their original positions. This allows the lubricating oil in the lubricating oil tank 210 to be drawn into the pressure cylinder 220 through the oil delivery pipe 250, preparing for the next lubricating oil addition. When the pressure cylinder 220 enters the tailstock body 100 along the lead screw 140, it fully mixes the lubricating oil outside the lead screw 140, thereby reducing frictional loss between the two and extending their service life. The parts not mentioned in this device are the same as or can be implemented using existing technology.

[0048] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A slender piston rod elastic tailstock for thermal spraying, comprising a tailstock body (100) and a support seat (110), wherein the bottom of the tailstock body (100) is fixed with a support seat (110) that slides on a lathe track, a clamping sleeve (120) is slidably sleeved inside the tailstock body (100), a tip (130) for abutting a shaft is fitted at the front end of the clamping sleeve (120), and a lead screw (140) extending to the outside of the tailstock body (100) is connected to the other end of the clamping sleeve (120), characterized in that: An oiling assembly (200) is provided above the clamping cylinder (120) inside the tailstock body (100), and an elastic assembly (150) is assembled on the outer wall of the lead screw (140) on one side of the end of the clamping cylinder (120). The oiling assembly (200) includes a pressure cylinder (220) located above the clamping cylinder (120) and fixed inside the tailstock body (100). A piston (240) is installed inside the pressure cylinder (220). A connecting rod (230) extending to the end of the pressure cylinder (220) is fixed to the end face of the pressure cylinder (220). An inverted Y-frame (270) for spraying lubricating oil onto the outer wall of the lead screw (140) is fixed to the end of the connecting rod (230). Two sets of nozzles (271) are installed at the lower part of the inverted Y-frame (270). A ball head rod (280) is longitudinally slidably provided inside the inverted Y-frame (270). A return spring (281) is sleeved on the outer wall of the ball head rod (280) inside the inverted Y-frame (270). An F seat (290) fixed to the end face of the clamping cylinder (120) is provided directly below the return spring (281). The elastic component (150) includes a positioning ring (152) connected to the outer wall of the lead screw (140) by bearings. The outer wall of the lead screw (140) is fitted with a cover (153) which is fixed to the end face of the tailstock body (100) by bolts. The positioning ring (152) has multiple sets of stepped elastic elements (151) fixed to the end face of the cover (153). The multiple sets of stepped elastic elements (151) are evenly distributed along the curved contour of the positioning ring (152).

2. The elastic tailstock for thermal spraying of a slender piston rod according to claim 1, characterized in that: The top of the tailstock body (100) is equipped with a lubricating oil tank (210), and one side of the lubricating oil tank (210) is provided with an oil delivery pipe (250) extending into the tailstock body (100) and communicating with the pressure cylinder (220). The top of the lubricating oil tank (210) is provided with an oil filling port.

3. The elastic tailstock for thermal spraying of a slender piston rod according to claim 1, characterized in that: The tailstock body (100) has a through circular channel (101) that extends horizontally inside, and the size of the circular channel (101) corresponds to that of the clamping cylinder (120). Two sets of constraint blocks (121) are fixed on the outer wall of the clamping cylinder (120). The inner wall of the circular channel (101) has a travel groove (102) for the constraint blocks (121) to slide. The clamping cylinder (120) has an internal thread that corresponds to the lead screw (140).

4. The elastic tailstock for thermal spraying of a slender piston rod according to claim 3, characterized in that: The inner wall of the circular channel (101) is provided with a relief groove (103) for fixing the oil filling assembly (200). The top of the tailstock body (100) is provided with a compression shank (104) for lowering the compression ball head rod (280). The top of the tailstock body (100) is provided with a threaded hole that matches the compression shank (104).

5. The elastic tailstock for thermal spraying of a slender piston rod according to claim 1, characterized in that: The inverted Y frame (270) has a reserved channel for the ball head rod (280) to slide up and down. The return spring (281) is assembled in the channel and its two ends are fixed to the outer wall of the ball head rod (280) and the inner wall of the channel, respectively.

6. The elastic tailstock for thermal spraying of a slender piston rod according to claim 1, characterized in that: The outer wall of the lead screw (140) is fitted with a crank handle at the position outside the tailstock body (100), and the lead screw (140) is not threaded at the contact position with the positioning ring (152).

7. The elastic tailstock for thermal spraying of a slender piston rod according to claim 1, characterized in that: It also includes an oil outlet pipe (260), which is a telescopic pipe. One-way check valve plates are installed inside the oil outlet pipe (260) and the oil delivery pipe (250) near the end of the pressure cylinder (220).

Images