External oil passage structure of slider

Abstract

The patent discloses an external oil path structure of a sliding block, which comprises an oil path main shell, one side of the oil path main shell is provided with an open port, the inside of the open port is divided into communicated oil inlet flow channels and oil delivery flow channels by a plurality of partitions, the oil inlet flow channels comprise oil injection ports arranged on both sides of the oil path main shell, and the oil delivery flow channels are communicated with return ball components of the sliding block; an oil path cover plate is arranged on the open port and is fixed between the partitions by ultrasonic welding. Compared with the prior art, the first aspect of the patent optimizes and improves the external oil path structure, reduces the interface, makes it suitable for ultrasonic welding fixation, completely solves the problems of unreliable sealing of the traditional structure, multiple nodes of the integrated block connection structure and easy leakage, and greatly improves the sealing performance of the oil path.

Description

Technical Field

[0001] This patent relates to the field of linear guide mechanisms, and in particular to an external oil circuit structure for a slider. Background Technology

[0002] In the field of mechanical transmission and precision equipment, the slider, as a key component for realizing linear reciprocating motion, is widely used in CNC machine tools, automated production lines, precision instruments, and other equipment. To ensure the smoothness of slider movement, reduce wear, and extend service life, its sliding parts are usually lubricated and cooled through an oil circuit structure.

[0003] External oil circuit structures have become a common choice in slider oil circuit design due to their advantages such as flexible layout, ease of maintenance and repair, and not occupying the core space inside the slider. They typically achieve the delivery of lubricating oil or coolant from an external oil supply system to the slider sliding surface by setting oil pipes, oil passage interfaces, and connecting components outside the slider.

[0004] Currently, the existing external hydraulic circuit structure designs mainly fall into the following categories: 1. Straight pipe plug-in structure. This design usually sets a tubular interface on the outer wall of the slider, and the end of the oil pipe is directly inserted into the interface. Initial fixation is achieved by the interference fit between the interface and the oil pipe. Some designs will use a single rubber ring at the plug-in joint for sealing. The advantage of this structure is that it is easy to assemble and can quickly complete the oil circuit connection. However, in order to facilitate insertion and removal, the interference is usually designed to be small, and the sealing effect depends on the elastic compression of the rubber ring.

[0005] 2. Integrated block connection structure: For sliders with multiple oil passage requirements, an external integrated block is often used as a transfer component. The integrated block is fixed to the side of the slider with bolts. The oil passage interface on the integrated block is connected to the oil passage inside the slider. The oil pipe is then connected to the interface on the integrated block. The sealing mainly relies on the sealing gasket between the contact surface of the integrated block and the slider and the sealing ring at the interface. This structure can integrate multiple oil passages and reduce the messy distribution of oil pipes, but there are many connection nodes, and each node may become a weak point in the seal.

[0006] Therefore, how to optimize the sealing design of the externally mounted slider oil circuit structure and improve its sealing performance to adapt to long-term stable operation under complex working conditions has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] This application proposes an external oil circuit structure for a slider, which solves the problems of poor sealing and easy oil leakage in the existing slider oil circuit structure.

[0008] The patented technical solution is: an external oil circuit structure for a slider, comprising: an oil circuit main shell, one side of which has an open opening, the inner side of which is divided by several partitions into a communicating oil inlet channel and an oil delivery channel, the oil inlet channel including oil injection ports on both sides of the oil circuit main shell, the oil delivery channel communicating with the return ball component of the slider; and an oil circuit cover plate, which is placed over the open opening and fixed to each of the partitions by ultrasonic welding.

[0009] Furthermore, the opening is provided with an outer wall, and the oil passage cover is fitted and installed on the inner side of the outer wall.

[0010] Furthermore, a support step is provided on the inner side of the outer wall, and the oil passage cover is welded and fixed to the support step.

[0011] Furthermore, both the supporting step and the partition plate at the end of the opening are provided with welding strips for welding with the oil passage cover plate.

[0012] Furthermore, the main oil circuit housing includes a first oil inlet and a second oil inlet respectively located on both sides of the open port, and the two ends of the oil inlet channel are respectively connected to the first oil inlet and the second oil inlet; the main oil circuit housing includes two symmetrically distributed oil delivery ports at the lower end, the oil delivery ports are located at both ends of the oil delivery channel, and the oil delivery ports are connected to the ball return component.

[0013] Furthermore, the middle part of the oil inlet channel is connected to the middle part of the oil delivery channel.

[0014] Furthermore, the oil inlet is provided with an oil nozzle for insertion into the ball return component, and the outside of the oil nozzle is also provided with an outer sealing cover that abuts against the outer wall of the ball return component. The inner side of the outer sealing cover is provided with a groove, and a sealing ring that contacts the outer wall of the ball return component is installed in the groove.

[0015] Furthermore, the other side of the main oil circuit housing with the open opening is fitted and fixed to the end face of the slider, and the main oil circuit housing has a plurality of through holes connecting the two sides of the main oil circuit housing for connecting with the slider.

[0016] Furthermore, the end of the slider is provided with an anti-collision post, and the main housing of the oil circuit is also provided with a clearance area to accommodate the anti-collision post.

[0017] Compared with existing technologies, this patent has several advantages. First, by optimizing and improving the external oil circuit structure and reducing the number of interfaces, it makes the structure suitable for ultrasonic welding and fixing, thus completely solving the problems of unreliable sealing in traditional structures and easy leakage due to the numerous nodes in integrated block connection structures, and significantly improving the sealing performance of the oil circuit. Second, the external layout does not occupy the internal space of the slider, and the flow channel design is compact and reasonable, adapting to the miniaturization and precision development needs of sliders. Third, the location design of the oil inlet and outlet facilitates installation and maintenance, reducing the operation and maintenance costs of the equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this patent, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this patent. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the assembly structure of the external oil circuit structure in the slider in this patent;

[0020] Figure 2 This is a schematic diagram showing the relative positions of the external oil circuit structure and the ball return component in this patent.

[0021] Figure 3 This is a three-dimensional structural diagram of the main oil passage housing in this patent;

[0022] Figure 4 This is a three-dimensional structural diagram of the oil passage cover plate in this patent;

[0023] Figure 5 This is a three-dimensional structural diagram of the external oil circuit structure from the bottom view in this patent.

[0024] Figure 6 This is a schematic diagram of the oil circuit structure of the external oil circuit in this patent;

[0025] Figure 7 This is a schematic diagram of the external oil circuit structure and the return ball component in this patent.

[0026] 1. Slider; 2. Main housing of oil circuit; 4. Partition plate; 5. Oil inlet channel; 6. Oil delivery channel; 9. Oil circuit cover plate; 10. Acoustic welding; 11. Outer wall; 12. Support step; 13. Welding strip; 14. First oil inlet; 15. Second oil inlet; 16. Oil delivery port; 17. Oil nozzle; 18. Outer sealing cover; 19. Slot; 20. Sealing ring; 21. Through hole; 22. Relief area; 23. Ball return component. Detailed Implementation

[0027] To make the technical problem to be solved, the technical solution, and the beneficial effects of this patent clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this patent and are not intended to limit the scope of this patent.

[0028] This patent provides an external oil circuit structure for the slider 1, combined with the attached... Figure 1 , 2 As shown, the externally mounted oil circuit structure of this patent mainly consists of two parts: the main oil circuit shell 2 and the oil circuit cover plate 9. The whole adopts an external design and is installed on the end face of the slider 1. It does not occupy the core motion space inside the slider 1 and is suitable for various equipment that require high-precision linear motion.

[0029] Among them, such as Figure 2 , 3 As shown in Figure 6, the main housing 2 of the oil passage is an integrally molded structure with an opening 3 on one side. The edge of the opening 3 is provided with a surrounding outer wall 11. The inner side of the outer wall 11 is machined with a support step 12. The support step 12 provides a stable support base for the subsequent assembly of the oil passage cover plate 9. Inside the opening 3, two interconnected flow channels are separated by several irregularly shaped partitions 4, namely the oil inlet flow channel 5 and the oil delivery flow channel 6. The partitions 4 and the support step 12 are provided with welding strips 13 at the ends near the opening 3. These welding strips 13 are raised prismatic structures. The width of the welding strips 13 is smaller than that of the partitions 4 and the support step 12, so as to form a tight connection with the oil passage cover plate 9. The width of the prismatic protruding welding strip 13 is smaller than that of the partition plate 4 and the support step 12, which can concentrate ultrasonic energy, enhance fusion strength, and ensure dense weld. The welding strips 13 of the irregular partition plate 4 are distributed according to the shape to avoid incomplete welding. The support step 12 ensures stable fit of the cover plate and forms a circumferential seal with the welding strip 13. In addition, the one-piece molding without splicing gaps greatly improves the welding sealing performance.

[0030] Furthermore, such as Figure 4 As shown, the shape of the oil passage cover 9 matches the opening 3. During assembly, the oil passage cover 9 is fitted into the inner side of the outer wall 11, with its lower end aligned with the welding strip 13 on the support step 12 and partition 4. Subsequently, the welding strip 13 is melted and fused with the oil passage cover 9 through ultrasonic welding 10, forming a gapless sealing surface. This welding method replaces the traditional bolt connection or rubber ring seal, fundamentally avoiding oil leakage problems caused by loose connections or aging seals, and significantly improving the sealing performance of the oil passage.

[0031] Furthermore, in conjunction with the appendix Figure 2 , 5As shown, a first oil inlet 14 and a second oil inlet 15 are provided on both sides of the main oil casing 2. Both oil inlets are connected to both ends of the oil inlet channel 5. Oil can be injected on one side or both sides according to the actual oil supply needs, and can be flexibly adapted to different external oil supply systems. The lower end of the main oil casing 2 is provided with two symmetrically distributed oil inlets 16. The oil inlets 16 are located at both ends of the oil delivery channel 6 and are connected to the top of the two ball return components 23 at the lower end of the slider 1. This ensures that the lubricating oil can be accurately delivered to the key moving parts of the slider 1. The ball return component 23 is the core component for the slider 1 to achieve linear reciprocating motion. It has a circulating track inside to accommodate and guide the balls (or rollers) to roll between the slider 1 and the guide rail. When the slider 1 moves along the guide rail, the balls roll in the bearing area and then return to the starting end through the curved structure of the ball return component 23, forming a continuous rolling cycle. This converts the sliding friction of the slider 1 into rolling friction, greatly reducing the motion resistance and improving the smoothness and accuracy of the slider 1's motion. It is a key component for the slider 1 to achieve high-precision linear motion.

[0032] Furthermore, in conjunction with the appendix Figure 6 , 7 As shown, the middle part of the oil inlet channel 5 is connected to the middle part of the oil delivery channel 6, forming a complete oil path with oil inlet on both sides, confluence in the middle, and delivery at both ends. The lubricating oil entering the oil inlet channel 5 from the first oil inlet 14 and the second oil inlet 15 converges in the middle of the oil inlet channel 5 and is then delivered to the return ball component 23 of the rolling track through the oil delivery port 16. This ensures that the lubricating oil is evenly distributed in the channel, solving the problem of uneven oil volume caused by path differences in traditional multi-oil-path systems and avoiding situations of excessively high local pressure or insufficient oil volume.

[0033] like Figure 5 As shown, an oil nozzle 17 is provided on the outer side of the oil inlet 16. The oil nozzle 17 can be directly inserted into the return ball component 23 to deliver lubricating oil. An outer sealing cover 18 is also fitted on the outer side of the oil nozzle 17. A groove 19 is opened on the inner side of the outer sealing cover 18, and a sealing ring 20 is installed in the groove 19. The sealing ring 20 is in close contact with the outer wall of the return ball component 23 to form a double sealing structure. This design further enhances the sealing performance at the connection between the oil inlet 16 and the return ball component 23, effectively preventing lubricating oil from leaking along the gap or being thrown out during the movement of the slider 1.

[0034] The side of the main oil circuit housing 2 opposite to the open port 3 is machined to be a flat surface. During installation, one side of the oil circuit cover plate 9 fits against the end face of the slider 1 and is fixed with bolts through several through holes 21. The through holes 21 penetrate both sides of the main oil circuit housing 2 to ensure a firm and reliable connection, keeping the oil circuit structure stable during the high-speed reciprocating motion of the slider 1. In addition, considering that the end of the slider 1 is usually equipped with anti-collision posts, a clearance area 22 is designed on the corresponding position on the main oil circuit housing 2 to avoid interference with the anti-collision posts and ensure the normal movement stroke of the slider 1.

[0035] The working process of this external oil circuit structure is as follows: The external oil supply system delivers lubricating oil to the oil inlet channel 5 through the first oil inlet 14 or the second oil inlet 15. The lubricating oil flows in the oil inlet channel 5 and converges towards the center. Then, it enters the oil delivery channel 6 through the connection between the oil inlet channel 5 and the middle of the oil delivery channel 6, and then flows along the oil delivery channel 6 to the oil delivery ports 16 at both ends. Finally, it is injected into the return ball component 23 through the oil nozzle 17 to lubricate the rolling elements and track inside. Throughout the process, the sealing surface formed by the ultrasonic welding 10 prevents lubricating oil from leaking from the open port 3, while the outer sealing cover 18 and the sealing ring 20 prevent oil leakage at the connection of the oil delivery port 16, ensuring that all the lubricating oil acts on the target part and improving lubrication efficiency.

[0036] Compared with existing technologies, this patent has several advantages. First, by optimizing and improving the external oil circuit structure and reducing the number of interfaces, it makes the structure suitable for ultrasonic welding and fixing, thus completely solving the problems of unreliable sealing in traditional structures and easy leakage due to the numerous nodes in integrated block connection structures, and significantly improving the sealing performance of the oil circuit. Second, the external layout does not occupy the internal space of the slider 1, and the flow channel design is compact and reasonable, adapting to the miniaturization and precision development needs of the slider 1. Third, the position design of the oil inlet and oil outlet 16 facilitates installation and maintenance, reducing the operation and maintenance costs of the equipment.

[0037] In summary, the externally mounted oil circuit structure of the slider 1 in this patent effectively solves the sealing problem of existing oil circuit structures through optimized structural design and sealing method. It is suitable for equipment with high requirements for lubrication performance and reliability, such as CNC machine tools, automated production lines, and precision instruments, and has broad application prospects.

[0038] The above description is merely a preferred embodiment of this patent and is not intended to limit this patent. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this patent should be included within the scope of protection of this patent.

Claims

1. An external hydraulic circuit structure for a slider, characterized in that, include: The main housing of the oil circuit has an open opening on one side. The inside of the open opening is divided into an interconnected oil inlet channel and an oil delivery channel by several partitions. The oil inlet channel includes an oil injection port on both sides of the main housing of the oil circuit. The oil delivery channel is connected to the ball return component of the slider. An oil passage cover plate is placed over the opening and fixed to each of the partitions by ultrasonic welding.

2. The external oil circuit structure according to claim 1, characterized in that, The opening has an outer wall, and the oil passage cover is fitted and installed on the inner side of the outer wall.

3. The external oil circuit structure according to claim 2, characterized in that, A support step is provided on the inner side of the outer wall, and the oil passage cover is welded and fixed to the support step.

4. The external oil circuit structure according to claim 3, characterized in that, Both the supporting step and the partition plate at the end of the opening are provided with welding strips for welding to the oil passage cover plate.

5. The external oil circuit structure according to claim 1, characterized in that, The main oil circuit housing includes a first oil inlet and a second oil inlet respectively located on both sides of the open port. The two ends of the oil inlet channel are respectively connected to the first oil inlet and the second oil inlet. The main oil circuit housing includes two symmetrically distributed oil delivery ports at the lower end. The oil delivery ports are located at both ends of the oil delivery channel and are connected to the return ball component.

6. The external oil circuit structure according to claim 5, characterized in that, The middle part of the oil inlet channel is connected to the middle part of the oil delivery channel.

7. The external oil circuit structure according to claim 5, characterized in that, The oil inlet is provided with an oil nozzle for insertion into the ball return component, and the outside of the oil nozzle is also provided with an outer sealing cover that abuts against the outer wall of the ball return component. The inner side of the outer sealing cover is provided with a groove, and a sealing ring that contacts the outer wall of the ball return component is installed in the groove.

8. The external oil circuit structure according to claim 1, characterized in that, The other side of the main oil circuit housing with the open opening is fixedly attached to the end face of the slider, and the main oil circuit housing has a number of through holes that connect the two sides of the main oil circuit housing for connecting with the slider.

9. The external oil circuit structure according to claim 1, characterized in that, The end of the slider is provided with an anti-collision post, and the main housing of the oil circuit is also provided with a clearance area to accommodate the anti-collision post.

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