A piston rod assembly

Abstract

The utility model discloses a piston rod combination device belongs to piston rod combination device field, including the assembly machine main part, the top fixed mounting of assembly machine main part has the support frame, is established in the support frame and is equipped with the oil storage groove, and the top fixed mounting of support frame has two groups telescopic mechanism, be provided with first oil injection ring and second oil injection ring on telescopic mechanism, be equipped with multiple groups of shower nozzle in first oil injection ring and second oil injection ring, through starting circulating oil pump, the lubricating oil in oil storage groove is transported to the oil injection ring through the flow guide pipe, then is evenly sprayed on the piston cylinder and piston rod contact surface by the shower nozzle, has realized automatic oil injection lubrication, has improved the uniformity and fullness of lubrication, has guaranteed that piston can run smoothly after assembling, has reduced the wear and breakdown that leads to because of lubrication deficiency, has promoted the assembly quality, and, the oil that falls is backflowed to the oil storage groove and forms the recycling through the backflow pipe, avoided the waste of lubricating oil, reduced production cost.

Description

Technical Field

[0001] This utility model relates to the technical field of piston rod assembly devices, specifically a piston rod assembly device. Background Technology

[0002] As a key component in mechanical transmission and power conversion systems, piston rod assemblies are widely used in various hydraulic equipment, pneumatic equipment, and engines. Their performance directly affects the operating efficiency, reliability, and service life of the entire equipment. Existing piston rods typically consist of two parts: a piston cylinder and a piston rod. The relative movement between the two parts depends on good lubrication conditions to reduce friction, wear, and overheating, thereby ensuring that the device can operate stably for a long time.

[0003] However, in current technological applications, existing piston rod assemblies face numerous problems during the assembly process. Applying lubricating oil between the piston cylinder and piston rod is a crucial step in the assembly process, but existing oil spraying methods mainly rely on manual operation. Manual oil spraying is not only inefficient, significantly increasing production cycles and labor costs during large-scale production, but it is also prone to oil leakage. Due to the lack of precise control methods during manual operation, lubricating oil can easily overflow into other parts of the piston rod assembly, or even drip onto production equipment or the ground. This not only wastes lubricating oil and increases production costs, but also pollutes the production environment and makes subsequent cleaning difficult.

[0004] Therefore, this utility model provides a piston rod assembly device to solve the above problems. Utility Model Content

[0005] (a) Technical problems to be solved This invention provides a piston rod assembly device, which aims to solve the problems mentioned in the background art.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a piston rod assembly device, comprising an assembly machine body, a first support base fixedly mounted on the assembly machine body, and a three-jaw chuck provided on the first support base; a support frame fixedly mounted on the top of the assembly machine body, an oil storage tank provided within the support frame, and two sets of telescopic mechanisms fixedly mounted on the top of the support frame, each telescopic mechanism having a first oil injection ring and a second oil injection ring, with multiple sets of nozzles provided within the first and second oil injection rings; multiple sets of support plates fixedly mounted on the top of the support frame, each set of support plates being used to place a piston cylinder and a piston rod to be assembled; an infusion assembly provided on the first and second oil injection rings, the infusion assembly being interconnected with the oil storage tank; and a pushing assembly provided on the assembly machine body for pushing the piston rod.

[0007] As a preferred technical solution of this application, the two sets of telescopic mechanisms include a drive assembly and two sets of housings. A bidirectional lead screw is installed in the two sets of housings through bearings, and a limit groove is opened on the side wall of the two sets of housings. Two sets of sliding seats are rotatably installed on the bidirectional lead screw. The side wall of the two sets of sliding seats extends out from the limit groove, and the two sets of sliding seats are fixedly connected to the first oil injection ring and the second oil injection ring respectively.

[0008] As a preferred technical solution of this application, the drive assembly includes a servo motor fixedly mounted on the side wall of the housing and a worm gear fixedly mounted on the bottom end of the bidirectional lead screw. A drive rod passes through the housing, and two sets of worms are fixedly mounted on the drive rod. The two sets of worms mesh with the worm gear. The output shaft of the servo motor is fixedly connected to the end of the drive rod.

[0009] As a preferred technical solution of this application, a circular tube is fixedly installed between the two sets of outer shells, and the drive rod is rotatably installed inside the circular tube.

[0010] As a preferred technical solution of this application, the side walls of the two sets of housings are fixedly installed with side plates by bolts.

[0011] As a preferred technical solution of this application, the infusion assembly includes a second guide pipe connected to the first oil injection ring and a first guide pipe and a return pipe connected to the second oil injection ring. The ends of the first guide pipe, the return pipe and the second guide pipe extend through the top of the support frame into the oil storage tank. The ends of the first guide pipe and the second guide pipe are both connected to a circulating oil pump.

[0012] As a preferred technical solution of this application, the side wall of the support frame is provided with an oil replenishment pipe, and a sealing cap is threaded onto the oil replenishment pipe.

[0013] As a preferred technical solution of this application, the sealing cap is wrapped with rubber.

[0014] As a preferred technical solution of this application, the pushing component includes a second support base fixedly installed on the assembly machine body, and an electric push rod is fixedly installed at the top of the second support base, and a limit component is provided at the end of the electric push rod.

[0015] As a preferred technical solution of this application, the limiting component includes a push plate slidably mounted on a second support base, and one side of the push plate is fixedly connected to an electric push rod, while a limiting collar is fixedly mounted on the other side of the push plate.

[0016] (III) Beneficial Effects 1. By driving the servo motor to rotate, a series of transmission structures drive the bidirectional lead screw to rotate, thereby bringing the two sets of sliding seats closer together, causing the first and second oil injection rings to engage between the piston cylinder and the piston rod. This driving method utilizes the precise control and rapid response of the servo motor, as well as the advantages of the smooth transmission and good self-locking of the worm gear and worm wheel, which can quickly and accurately complete the positioning operation of the oil injection ring.

[0017] 2. By starting the circulating oil pump, the lubricating oil in the oil storage tank is transported to the oil injection ring through the guide pipe, and then evenly sprayed onto the contact surface of the piston cylinder and piston rod by the nozzle. This achieves automatic oil spraying lubrication, improves the uniformity and sufficiency of lubrication, ensures that the piston can run smoothly after assembly, reduces wear and failure caused by insufficient lubrication, and improves assembly quality. Moreover, the oil that falls off flows back to the oil storage tank through the return pipe to form a recycling system, avoiding waste of lubricating oil and reducing production costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first overall structure of the present invention; Figure 2 This is a schematic diagram of the second overall structure of the present invention; Figure 3 This is a schematic diagram of the support frame structure in this utility model; Figure 4 This is a cross-sectional view of the support frame structure in this utility model; Figure 5 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 6 for Figure 3 Enlarged structural diagram at point B.

[0019] In the diagram: 1. Assembly machine body; 11. First support seat; 12. Three-jaw chuck; 2. Piston cylinder; 21. Piston rod; 3. Second support seat; 31. Electric push rod; 32. Push plate; 33. Limiting collar; 4. Support frame; 41. Oil replenishment pipe; 42. Sealing cover; 43. Circulating oil pump; 44. Oil storage tank; 45. Support plate; 5. First oil injection ring; 51. Nozzle; 52. Second oil injection ring; 6. Outer shell; 61. Two-way lead screw; 62. Sliding seat; 63. Side plate; 7. First guide pipe; 71. Return pipe; 72. Second guide pipe; 8. Servo motor; 81. Worm gear; 82. Worm; 83. Drive rod; 84. Round tube; 9. Limiting groove. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides a piston rod assembly device, such as... Figures 1-6 As shown, the assembly machine includes a main body 1, on which a first support base 11 is fixedly mounted. A three-jaw chuck 12 is mounted on the first support base 11, which can precisely clamp the piston cylinder 2, providing stable positioning for subsequent assembly. A support frame 4 is fixedly mounted at the top of the main body 1. An oil reservoir 44 is opened inside the support frame 4, and two sets of telescopic mechanisms are fixedly mounted at the top of the support frame 4. A first oil injection ring 5 and a second oil injection ring 52 are mounted on the telescopic mechanisms. Multiple sets of nozzles 51 are installed inside the support frame 4. Two sets of telescopic mechanisms at the top of the support frame 4 drive the first oil injection ring 5 and the second oil injection ring 52 to move, so as to achieve precise oil injection position control. Multiple sets of support plates 45 are fixedly installed at the top of the support frame 4. The piston cylinder 2 and piston rod 21 to be assembled are placed on the multiple sets of support plates 45 respectively. The first oil injection ring 5 and the second oil injection ring 52 are provided with liquid infusion components. The liquid infusion components are connected to the oil storage tank 44. The assembly machine body 1 is provided with a pushing component for pushing the piston rod 21.

[0022] The two sets of telescopic mechanisms include a drive assembly and two sets of housings 6. The housings 6 provide protection and installation space for internal components such as the bidirectional lead screw 61. The bidirectional lead screw 61 is installed inside the two sets of housings 6 via bearings, ensuring its flexible and stable rotation. Limiting grooves 9 are provided on the side walls of the two sets of housings 6. Two sets of sliding seats 62 are rotatably mounted on the bidirectional lead screw 61. The side walls of the two sets of sliding seats 62 extend from the limiting grooves 9, and the two sets of sliding seats 62 are fixedly connected to the first oil injection ring 5 and the second oil injection ring 52, respectively. The limiting grooves 9 provide precise guidance and limitation for the sliding seats 62, ensuring that the sliding seats 62 can only move linearly along the axial direction of the bidirectional lead screw 61. This ensures that the first oil injection ring 5 and the second oil injection ring 52, which are fixedly connected to the sliding seats 62, can accurately move to the appropriate position, achieving precise oil injection and improving the lubrication effect during assembly.

[0023] The drive assembly includes a servo motor 8 fixedly mounted on the side wall of the housing 6 and a worm gear 81 fixedly mounted on the bottom end of the bidirectional lead screw 61. A drive rod 83 runs through the housing 6, and two sets of worms 82 are fixedly mounted on the drive rod 83. The two sets of worms 82 mesh with the worm gear 81. The output shaft of the servo motor 8 is fixedly connected to the end of the drive rod 83. The servo motor 8 drives the drive rod 83 to rotate. The worms 82 on the drive rod 83 mesh with the worm gear 81 at the bottom end of the bidirectional lead screw 61 to transmit the rotational motion, thus converting the rotational motion into the rotation of the bidirectional lead screw 61. This transmission method has the characteristics of smooth transmission and good self-locking, which can ensure that the first oil injection ring 5 and the second oil injection ring 52 are stable and reliable during movement, and can maintain a fixed position when stopped, ensuring the accuracy of the oil injection position.

[0024] A circular tube 84 is fixedly installed between the two sets of outer shells 6. The drive rod 83 is rotatably installed inside the circular tube 84. The circular tube 84 provides stable support and rotation guidance for the drive rod 83, so that the drive rod 83 remains stable during rotation, reducing transmission errors caused by shaking or offset, and ensuring accurate and reliable meshing transmission between the worm gear 82 and the worm wheel 81.

[0025] The side walls of the two sets of outer shells 6 are fixed with side plates 63 by bolts, which serve to seal and protect the internal components of the outer shells 6, prevent dust, debris and other objects from entering and affecting the normal operation of the components, and facilitate disassembly for inspection and maintenance of the internal components when needed, thus extending the service life of the equipment.

[0026] The infusion assembly includes a second guide pipe 72 connected to the first oil injection ring 5, and a first guide pipe 7 and a return pipe 71 connected to the second oil injection ring 52. The ends of the first guide pipe 7, the return pipe 71, and the second guide pipe 72 extend through the top of the support frame 4 into the oil storage tank 44. The return pipe 71 returns excess or dripping lubricating oil to the oil storage tank 44, forming a lubricating oil recycling system. This saves lubricating oil costs and avoids lubricating oil accumulation in the working area, which can cause pollution. The ends of the first guide pipe 7 and the second guide pipe 72 are connected to a circulating oil pump 43, which is installed in the oil storage tank 44. The first guide pipe 7 and the second guide pipe 72 respectively transport the lubricating oil in the oil storage tank 44 to the second oil injection ring 52 and the first oil injection ring 5, realizing the directional supply of lubricating oil.

[0027] The support frame 4 has an oil replenishment pipe 41 on its side wall, which provides a convenient oil replenishment channel for the oil storage tank 44. When the lubricating oil in the oil storage tank 44 is insufficient, the lubricating oil can be quickly replenished through the oil replenishment pipe 41 to ensure that the device can continue to work normally. The oil replenishment pipe 41 is threaded with a sealing cap 42, which can tightly seal the oil replenishment pipe 41 to prevent lubricating oil leakage and external dust and debris from entering the oil storage tank 44, thus ensuring the cleanliness of the lubricating oil and the sealing performance of the device.

[0028] The sealing cap 42 is wrapped with rubber, which has good elasticity and sealing properties. Wrapping it inside the sealing cap 42 can enhance the sealing effect between the sealing cap 42 and the oil supply pipe 41, effectively preventing lubricating oil leakage.

[0029] The pushing component includes a second support base 3 fixedly installed on the assembly machine body 1, and an electric push rod 31 is fixedly installed at the top of the second support base 3. The end of the electric push rod 31 is provided with a limit component. The electric push rod 31 can provide precise linear pushing force to achieve precise pushing of the piston rod 21.

[0030] The limiting component includes a push plate 32 that is slidably mounted on the second support base 3. One side of the push plate 32 is fixedly connected to the electric push rod 31, and a limiting collar 33 is fixedly mounted on the other side of the push plate 32. The limiting collar 33 is fixed on the other side of the push plate 32, and its inner diameter matches the outer diameter of the piston rod 21. It can accurately fit the end of the piston rod 21 and play a stabilizing and guiding role during the pushing process, preventing the piston rod 21 from deviating and ensuring that the piston rod 21 can be accurately fitted into the piston cylinder 2.

[0031] Working principle: First, place the piston cylinder 2 and piston rod 21 to be assembled on the multiple sets of support plates 45 at the top of the support frame 4. Then, start the three-jaw chuck 12 set on the first support seat 11 on the main body of the assembly machine. The three-jaw chuck 12 precisely clamps the end of the piston cylinder 2 through the synchronous movement of its three jaws. Restart the electric push rod 31, and the electric push rod 31 begins to extend, pushing the push plate 32 connected to it. The push plate 32 is slidably mounted on the second support seat 3, which can ensure that it moves stably in a straight line under the push of the electric push rod 31. A limiting collar 33 is fixedly installed on the other side of the push plate 32. The inner diameter of the limiting collar 33 matches the outer diameter of the piston rod 21. As the push plate 32 moves, the limiting collar 33 gradually approaches the end of the piston rod 21 and finally engages with the end of the piston rod 21. Then, the servo motor 8 starts to operate. The servo motor 8 is fixedly mounted on the side wall of the housing 6, and its output shaft is fixedly connected to the end of the drive rod 83. The servo motor 8 drives the drive rod 83 to rotate. The drive rod 83 is rotatably mounted inside the circular tube 84, which is fixedly mounted between the two sets of housings 6, providing stable support and rotational guidance for the drive rod 83. Two sets of worm gears 82 are fixedly mounted on the drive rod 83. As the drive rod 83 rotates, the worm gears 82 also rotate. Simultaneously, a double-acting lead screw 61 is mounted inside the two sets of housings 6 via bearings. A worm wheel 81 is fixedly mounted at the bottom end of the double-acting lead screw 61. The worm gear 82 and the worm wheel 81 mesh with each other. When the worm gear 82 rotates, it will... The worm gear 81 is driven to rotate, which in turn causes the double-acting screw 61 to rotate around its own axis. Two sets of sliding seats 62 are rotatably mounted on the double-acting screw 61. The side walls of the two sets of housings 6 are provided with limiting grooves 9. The side walls of the sliding seats 62 extend from the limiting grooves 9 and are fixedly connected to the first oil injection ring 5 and the second oil injection ring 52 respectively. Due to the limitation of the limiting grooves 9, the sliding seats 62 can only move linearly along the axis of the double-acting screw 61. When the double-acting screw 61 rotates, the two sets of sliding seats 62 will move closer to each other under the drive of the double-acting screw 61, thereby causing the first oil injection ring 5 and the second oil injection ring 52 to engage between the piston cylinder 2 and the piston rod 21, thus determining the accurate position for the subsequent automatic oil injection operation. Finally, the circulating oil pump 43 in the oil storage tank 44 is started. The circulating oil pump 43 starts working and delivers the lubricating oil in the oil storage tank 44 to the second oil injection ring 52 and the first oil injection ring 5 through the first guide pipe 7 and the second guide pipe 72, respectively. The first oil injection ring 5 and the second oil injection ring 52 are equipped with multiple sets of nozzles 51. The lubricating oil is evenly sprayed on the contact surface between the piston cylinder 2 and the piston rod 21 through the nozzles 51 to achieve automatic oil spraying lubrication. During the oil spraying process, the oil that falls off flows back to the oil storage tank 44 through the return pipe 71, forming the recycling of oil. This not only avoids the waste of lubricating oil, but also ensures the cleanliness of the working environment.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A piston rod assembly device, comprising an assembly machine body (1), wherein a first support base (11) is fixedly mounted on the assembly machine body (1), and a three-jaw chuck (12) is provided on the first support base (11), characterized in that: A support frame (4) is fixedly installed on the top of the assembly machine body (1). An oil storage tank (44) is opened in the support frame (4). Two sets of telescopic mechanisms are fixedly installed on the top of the support frame (4). A first oil injection ring (5) and a second oil injection ring (52) are provided on the telescopic mechanism. Multiple sets of nozzles (51) are provided in the first oil injection ring (5) and the second oil injection ring (52). The top of the support frame (4) is fixedly installed with multiple sets of support plates (45), and the piston cylinder (2) and piston rod (21) to be assembled are respectively placed on the multiple sets of support plates (45). The first oil injection ring (5) and the second oil injection ring (52) are provided with infusion components, and the infusion components are connected to the oil storage tank (44); The assembly machine body (1) is provided with a pushing component for pushing the piston rod (21).

2. The piston rod assembly according to claim 1, characterized in that: The two sets of telescopic mechanisms include a drive assembly and two sets of housings (6). A bidirectional lead screw (61) is installed in the two sets of housings (6) through bearings, and a limit groove (9) is opened on the side wall of the two sets of housings (6). Two sets of sliding seats (62) are rotatably installed on the bidirectional lead screw (61). The side walls of the two sets of sliding seats (62) extend out from the limit groove (9), and the two sets of sliding seats (62) are fixedly connected to the first oil injection ring (5) and the second oil injection ring (52) respectively.

3. The piston rod assembly according to claim 2, characterized in that: The drive assembly includes a servo motor (8) fixedly mounted on the side wall of the housing (6) and a worm gear (81) fixedly mounted on the bottom end of the bidirectional lead screw (61). A drive rod (83) passes through the housing (6), and two sets of worms (82) are fixedly mounted on the drive rod (83). The two sets of worms (82) mesh with the worm gear (81). The output shaft of the servo motor (8) is fixedly connected to the end of the drive rod (83).

4. The piston rod assembly according to claim 3, characterized in that: A circular tube (84) is fixedly installed between the two sets of outer shells (6), and the drive rod (83) is rotatably installed inside the circular tube (84).

5. A piston rod assembly according to claim 4, characterized in that; The side walls of the two sets of outer shells (6) are fixedly mounted with side plates (63) by bolts.

6. The piston rod assembly according to claim 1, characterized in that: The infusion assembly includes a second guide pipe (72) connected to the first oil injection ring (5) and a first guide pipe (7) and a return pipe (71) connected to the second oil injection ring (52). The ends of the first guide pipe (7), the return pipe (71) and the second guide pipe (72) extend through the top of the support frame (4) into the oil storage tank (44). The ends of the first guide pipe (7) and the second guide pipe (72) are both connected to a circulating oil pump (43).

7. The piston rod assembly according to claim 1, characterized in that: The side wall of the support frame (4) is provided with an oil supply pipe (41), and a sealing cap (42) is threaded on the oil supply pipe (41).

8. A piston rod assembly according to claim 7, characterized in that: The sealing cap (42) is wrapped with rubber.

9. A piston rod assembly according to claim 1, characterized in that: The pushing component includes a second support base (3) fixedly installed on the assembly machine body (1), and an electric push rod (31) is fixedly installed at the top of the second support base (3), and a limit component is provided at the end of the electric push rod (31).

10. A piston rod assembly according to claim 9, characterized in that: The limiting component includes a push plate (32) that is slidably mounted on the second support base (3), and one side of the push plate (32) is fixedly connected to the electric push rod (31), and a limiting collar (33) is fixedly mounted on the other side of the push plate (32).

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