Rolling linear guide rail pair with integrated ball circulation retention structure

Abstract

The application discloses a rolling linear guide rail pair with integrated ball circulation retaining structure, which comprises a linear guide rail, a slider body and a reverser fixed at two ends of the slider body respectively, two upper guide rail raceways and two lower guide rail raceways are symmetrically arranged on the two side walls of the linear guide rail, the slider body is installed on the linear guide rail, and two sets of ball circulation retaining devices are symmetrically arranged in the inner cavity of the slider body; each set of ball circulation retaining device comprises an upper retainer, a middle retainer and a lower retainer, and the slider body is symmetrically provided with an upper slider raceway corresponding to the upper guide rail raceway and a lower slider raceway corresponding to the lower guide rail raceway; the application has the advantages that the assembly efficiency of plastic parts is improved, the operation noise of the linear guide rail pair is well controlled, the overall precision and production efficiency of the linear guide rail pair are improved, and the overall manufacturing cost of the linear guide rail pair is saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of guide rail pairs, in particular to a rolling linear guide rail pair with an integrated ball circulation retaining structure. BACKGROUND

[0002] Domestic numerical control machine tools and basic manufacturing equipment have made great efforts, and the market share is steadily increasing, and is occupying the commanding point in the key field, and the performance of the linear guide rail pair, which is an important part of the function component, is necessary to improve, and then to improve the basic support ability of the industry.

[0003] The linear guide rail pair is composed of a linear guide rail and a slider assembly, and its working mode is that the slider assembly makes reciprocating linear motion on the hardened rail raceway of the linear guide rail through the rolling of the internal balls. At present, the slider assembly is composed of a slider body, an upper retainer, a middle retainer, a lower retainer, a reverser, a reverser stopper, balls and a sealing end cover. The sealing end cover is installed on the end face of the reverser, and the reverser is installed on the two end faces of the slider body, wherein the reverser stopper is embedded in the reverser to change the running direction of the balls to achieve the purpose of reversing, so that the balls can run from the raceway of the slider body into the reversing hole of the slider body, and then run back from the reversing hole to the raceway of the slider body. The upper, middle and lower retainers are installed on the raceway in the inner cavity of the slider body to prevent the balls from falling during circulation, and the reverser installed on the two end faces of the slider body is positioned and fixed by a mortise and tenon structure.

[0004] Nowadays, during the assembly process of the slider assembly, the retainers and the reverser stopper need to be assembled into the corresponding positions of the slider body by manual operation. They have a mutual matching relationship. However, since the closed circulation path of the balls is composed of various plastic parts and the slider body, in order to ensure the smoothness of the path, the overall operation smoothness and precision of the linear guide rail pair need to be ensured, and the machining technology requirements of the slider body and the plastic parts and the assembly technology requirements of the plastic parts are relatively high. In addition, the hole wall of the reversing hole of the slider body needs to have a small roughness, the position size tolerance of the reversing hole needs to be small, and the relative position size between the slider raceway and the reversing hole also needs to be ensured. Otherwise, the plastic parts cannot be installed in the correct position of the slider body, which may cause misplacement and deformation. The matching size of the plastic parts themselves is also not in place, which directly affects the subsequent assembly effect and the overall operation of the linear guide rail pair. In addition, the number of plastic parts required for assembly directly affects the assembly efficiency. In summary, the comprehensive cost required during the manufacturing process is relatively high. For high-speed running linear guide rail pairs, the more parts that make up the slider assembly, the more difficult it is to control the noise generated by the balls during operation in the closed circulation path, and the more difficult it is to ensure the overall operation smoothness and precision of the linear guide rail pair.

[0005] Therefore, it is an urgent technical problem for those skilled in the art to design and develop a linear guide rail pair capable of improving the overall precision and production efficiency of the linear guide rail pair. SUMMARY

[0006] In order to solve the above-mentioned problems in the prior art, the application provides a rolling linear guide rail pair with an integrated ball circulation and retention structure, which improves the smoothness of the overall operation of the linear guide rail pair, reduces the machining technical requirements for the slider body and the assembly technical requirements for the plastic parts to a certain extent, improves the assembly efficiency of the plastic parts, better controls the operation noise of the linear guide rail pair, improves the overall precision and production efficiency of the linear guide rail pair, and saves the overall manufacturing cost of the linear guide rail pair.

[0007] The technical scheme adopted by the application to solve the above-mentioned technical problems is as follows: a rolling linear guide rail pair with an integrated ball circulation and retention structure, comprising a linear guide rail, a slider body, and a reverser fixed at both ends of the slider body, respectively, two upper guide rail raceways and two lower guide rail raceways are symmetrically arranged on the left and right sides of the linear guide rail, the slider body is installed on the linear guide rail, and the application further comprises two sets of ball circulation and retention devices symmetrically arranged in the inner cavity of the slider body, each set of the ball circulation and retention device comprises an upper retainer, a middle retainer, and a lower retainer, the slider body is symmetrically provided with an upper slider raceway corresponding to the upper guide rail raceway and a lower slider raceway corresponding to the lower guide rail raceway, the upper retainer, the middle retainer, and the lower retainer are longitudinally arranged in the slider body from top to bottom, and an upper limiting raceway is formed between the upper retainer and the middle retainer, an upper circulation channel is formed between the upper slider raceway, the upper limiting raceway, and the two reversers, a plurality of upper balls are installed in the upper circulation channel, a lower limiting raceway is formed between the lower retainer and the middle retainer, a lower circulation channel is formed between the lower slider raceway, the lower limiting raceway, and the two reversers, and a plurality of lower balls are installed in the lower circulation channel.

[0008] An upper arc-shaped stopper is arranged between the upper limiting raceway and the upper slider raceway, the upper arc-shaped stopper is provided with an upper arc-shaped raceway, the reverser is installed on the upper arc-shaped stopper, and an upper turning raceway is formed between the upper arc-shaped raceway and the reverser. In this structure, the upper arc-shaped raceway arranged on the upper arc-shaped stopper is used to assist the upper balls in turning, an upper turning raceway is formed between the upper arc-shaped raceway and the reverser, the upper balls can circulate in the upper circulation channel indefinitely, and the upper balls directly contact the upper guide rail raceway on the linear guide rail to indirectly support the entire slider body.

[0009] The lower limit raceway and the lower block pipe are provided with a lower arc-shaped stopper, the lower arc-shaped stopper is provided with a lower arc-shaped raceway, the reverser is covered and installed on the lower arc-shaped stopper, and a lower turning raceway is formed between the lower arc-shaped raceway and the reverser. In this structure, the lower arc-shaped raceway provided on the lower arc-shaped stopper is used to assist the turning action of the lower ball, and a lower turning raceway is formed between the lower arc-shaped raceway and the reverser, so that the lower ball can circulate in the lower circulation channel, and the lower ball directly contacts the lower rail raceway on the linear guide rail to indirectly support the entire slider body. The slider body drives the entire slider body to move vertically and linearly along the linear guide rail through the circulation of the upper balls and the lower balls in the slider body.

[0010] The upper holder is provided with upper grooves distributed in the longitudinal direction, and the lower holder is provided with lower grooves distributed in the longitudinal direction. In this structure, the upper grooves reduce the contact area between the upper balls and the upper holder, and the lower grooves reduce the contact area between the lower balls and the lower holder, which can effectively reduce the overall operating noise.

[0011] The slider body is symmetrically provided with upper and lower guide pipes distributed at intervals, the upper and lower guide pipes are respectively fixed in the slider body in the longitudinal direction, the upper guide pipe forms the upper block raceway, the side wall of the upper guide pipe is symmetrically provided with upper emptying grooves in communication with the upper block raceway, the lower guide pipe forms the lower block raceway, and the side wall of the lower guide pipe is symmetrically provided with lower emptying grooves in communication with the lower block raceway. In this structure, the upper and lower guide pipes are made of synthetic resin, the upper guide pipe is used to accommodate the upper balls, and the lower guide pipe is used to accommodate the lower balls, so that the upper balls and the lower balls are no longer in direct contact with the slider body, which reduces the processing technical requirements of the slider body, reduces the processing difficulty, improves the production efficiency, and reduces the manufacturing cost.

[0012] Each of the reversers is provided with a sealing end cover, each of the sealing end covers is provided with a screw, and one end of the screw penetrates through the reverser and is fixed on the slider body. In this structure, the screw is used for fixation, which is easy to disassemble and maintain, the sealing end cover is not directly fixed on the reverser, but is fixed on the slider body, and the reverser is firmly clamped between the slider body and the sealing end cover. In addition, the reverser and the slider body are connected by another fastening screw, thereby achieving the purpose of reliable fixation.

[0013] The upper side of the inner cavity of the sliding block body is fixed with two reinforcing ribs, the two reinforcing ribs are integrally formed with the sliding block body, and a lightening groove is formed between the two reinforcing ribs.

[0014] The upper guide rail raceway and the lower guide rail raceway form a 90-degree angle, the upper guide rail raceway is matched with the upper ball in a 45-degree contact angle configuration, and the lower guide rail raceway is also matched with the lower ball in a 45-degree contact angle configuration.

[0015] Compared with the prior art, the advantages of the present application are:

[0016] 1) The linear guide rail pair adopts an integrated ball circulation retaining structure, effectively reducing the number of required assembly parts, avoiding installation errors of the previous retaining frames and arc-shaped blocks, and reducing the assembly technical requirements to a certain extent, simplifying the original complex assembly process, achieving efficient assembly, and improving the assembly efficiency of the sliding block assembly.

[0017] 2) The upper guide pipe and the lower guide pipe are arranged in the sliding block body, so that the original metal-on-metal collision of the balls with the sliding block body is converted into metal-on-synthetic resin collision during the operation of the sliding block body, and the upper groove, the lower groove, the upper avoidance groove and the lower avoidance groove are arranged to reduce the contact area of each ball, which can greatly reduce the overall noise of the linear guide rail pair, and also can reduce the wear speed of each ball, prolonging the service life of the linear guide rail pair;

[0018] 3) The number of plastic parts is effectively reduced, from the previous combination of multiple plastic parts to an integrated ball circulation retaining device, which is integrated into the sliding block body, reducing the machining requirements of the sliding block body, improving the production efficiency, and reducing the manufacturing cost. Since there is no need to consider the cooperation size precision and overall deformation of the original split combination type retaining frame and block, the consistency of the size and the integrity of the plastic part are guaranteed, and the cooperation between the plastic part and the sliding block body is more compact and close, so that the smoothness of the upper circulation channel and the lower circulation channel can be easily guaranteed, making the operation of each ball more smooth and stable, avoiding the violent vibration of the linear guide rail pair during high-speed operation, effectively controlling the operation noise of the linear guide rail pair, and improving the overall operation smoothness, stability and precision of the linear guide rail pair. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1A perspective view of the present application;

[0020] Figure 2 A sectional view of the present application;

[0021] Figure 3 A perspective view of the slider body in the present application;

[0022] Figure 4 A front view of the slider body in the present application;

[0023] Figure 5 A sectional view of the slider body in the present application;

[0024] Figure 6 A perspective view of the reverser in the present application. DETAILED DESCRIPTION

[0025] The present application is further described in detail below in conjunction with the accompanying drawings and examples, but is not limited to the present application.

[0026] Example One: As shown in the drawings, a rolling linear guide rail pair with an integrated ball circulation retaining structure, comprising a linear guide rail 1, a slider body 2 and reversers 3 fixed at both ends of the slider body 2 respectively, two upper guide rail raceways 11 and two lower guide rail raceways 12 are symmetrically arranged on the left and right side walls of the linear guide rail 1 respectively, the slider body 2 is installed on the linear guide rail 1, and further comprising two sets of ball circulation retaining devices 4 symmetrically arranged in the inner cavity of the slider body 2, each set of ball circulation retaining devices 4 comprises an upper retainer 41, a middle retainer 42 and a lower retainer 43, the slider body 2 is symmetrically provided with an upper slider raceway 21 corresponding to the upper guide rail raceway 11 and a lower slider raceway 22 corresponding to the lower guide rail raceway 12, the upper retainer 41, the middle retainer 42 and the lower retainer 43 are longitudinally arranged in the slider body 2 from top to bottom, and an upper limiting raceway 44 is formed between the upper retainer 41 and the middle retainer 42, an upper circulation passage is formed between the upper slider raceway 21, the upper limiting raceway 44 and the two reversers 3, a plurality of upper balls 46 are installed in the upper circulation passage, a lower limiting raceway 45 is formed between the lower retainer 43 and the middle retainer 42, a lower circulation passage is formed between the lower slider raceway 22, the lower limiting raceway 45 and the two reversers 3, and a plurality of lower balls 48 are installed in the lower circulation passage.

[0027] The upper retainer 41, the middle retainer 42 and the lower retainer 43 are formed by injecting synthetic resin into the corresponding specified position on the basis of the slider body 2 that has been machined to meet the technical requirements, and then cooling and demolding by using injection molding technology. Once the injection molding of the slider body 2 is completed, the ball circulation retaining device 4 cannot be disassembled from the slider body 2, unless it is disassembled destructively, and the manufacturing process level is improved to a certain extent.

[0028] In the embodiment two, as shown in the figure, the other structures are the same as those in the embodiment one, and the difference is that an upper arc-shaped stopper 49 is arranged between the upper limiting raceway 44 and the upper slider channel, an upper arc-shaped raceway 50 is arranged on the upper arc-shaped stopper 49, the reverser 3 is covered and mounted on the upper arc-shaped stopper 49, and an upper turning raceway is formed between the upper arc-shaped raceway 50 and the reverser 3. In this structure, the upper arc-shaped raceway 50 arranged on the upper arc-shaped stopper 49 is used to assist the upper ball 46 to perform the turning action, and an upper turning raceway is formed between the upper arc-shaped raceway 50 and the reverser 3, so that the upper ball 46 can circulate in the upper circulating channel indefinitely, and the upper ball 46 directly contacts the upper rail raceway 11 on the linear guide rail 1 to indirectly support the entire slider body 2.

[0029] A lower arc-shaped stopper 51 is arranged between the lower limiting raceway 45 and the lower slider channel, a lower arc-shaped raceway 52 is arranged on the lower arc-shaped stopper 51, the reverser 3 is covered and mounted on the lower arc-shaped stopper 51, and a lower turning raceway is formed between the lower arc-shaped raceway 52 and the reverser 3. In this structure, the lower arc-shaped raceway arranged on the lower arc-shaped stopper 51 is used to assist the lower ball 48 to perform the turning action, and a lower turning raceway is formed between the lower arc-shaped raceway and the reverser 3, so that the lower ball 48 can circulate in the lower circulating channel indefinitely, and the lower ball 48 directly contacts the lower rail raceway 12 on the linear guide rail 1 to indirectly support the entire slider body 2. The slider body 2 is driven to move longitudinally and linearly along the linear guide rail 1 by the circulating rolling of the upper ball 46 and the lower ball 48 in the slider body 2.

[0030] The upper retainer 41 is provided with upper grooves 411 distributed along the longitudinal direction, and the lower retainer 43 is provided with lower grooves 431 distributed along the longitudinal direction. In this structure, the upper grooves 411 reduce the contact area between the upper ball 46 and the upper retainer 41, and the lower grooves 431 reduce the contact area between the lower ball 48 and the lower retainer 43, so that the overall operation noise can be effectively reduced.

[0031] The slider body 2 is symmetrically provided with an upper guide pipe 23 and a lower guide pipe 24 distributed at intervals between the upper and lower guide pipes. The upper guide pipe 23 and the lower guide pipe 24 are respectively fixed in the slider body 2 along the longitudinal direction. The upper guide pipe 23 is formed with an upper slider raceway 21, and the side wall of the upper guide pipe 23 is symmetrically provided with upper emptying grooves 25 in communication with the upper slider raceway 21. The lower guide pipe 24 is formed with a lower slider raceway 22, and the side wall of the lower guide pipe 24 is symmetrically provided with lower emptying grooves 26 in communication with the lower slider raceway 22. In this structure, the upper guide pipe 23 is used to accommodate the upper ball 46, and the lower guide pipe 24 is used to accommodate the lower ball 48, so that the upper ball 46 and the lower ball 48 no longer directly contact the slider body 2, thereby reducing the machining technical requirements of the slider body 2, reducing the machining difficulty, improving the production efficiency, and reducing the manufacturing cost.

[0032] Embodiment three: as shown, other structures are the same as embodiment two, the difference is that the outer side of each returner 3 is provided with a sealing end cover 5, a screw is installed on each sealing end cover 5, one end of the screw is fixed on the slider body 2 after passing through the returner 3. In this structure, the screw fixing mode is easy to disassemble and assemble, and is convenient for later maintenance. The sealing end cover 5 is not directly fixed on the returner 3, but is fixed with the slider body 2. The returner 3 is thus firmly clamped between the slider body 2 and the sealing end cover 5. In addition, the returner 3 and the slider body 2 are connected by another fastening screw, thereby achieving the purpose of reliable fixation.

[0033] Two reinforcing ribs 27 are fixed on the upper side of the inner cavity of the slider body 2. The two reinforcing ribs 27 are integrally formed with the slider body 2, and a lightening groove 28 is formed between the two reinforcing ribs 27. In this structure, the reinforcing ribs 27 are provided to avoid the structure being too thin and not strong enough. There is a certain gap between the reinforcing ribs 27 and the upper top surface of the linear guide rail 1, and they do not directly contact each other, thereby playing a limiting role. In this way, both subtractive processing and uniform thickness of the plastic part are achieved, thereby reducing deformation during plastic molding.

[0034] The upper guide rail raceway 11 and the lower guide rail raceway 12 form a 90-degree angle. The upper guide rail raceway 11 is configured with a 45° contact angle, and the lower guide rail raceway 12 is also configured with a 45° contact angle. Thus, the upper and lower balls 46 and 48 can bear uniform loads in four directions of up, down, left and right.

[0035] It is worth noting that the above is only the preferred embodiment of the present application, and does not limit the patent protection range of the present application. The present application can also improve the structure of the above-mentioned various components in terms of material and structure, or replace it with a technically equivalent object. Therefore, any equivalent structural changes made by using the content of the specification and drawings, or directly or indirectly applied to other related technical fields are also included in the scope covered by the present application.

Claims

1. A rolling linear guide pair with an integrated ball circulation retention structure, comprising a linear guide rail, a slider body, and return devices fixed to both ends of the slider body, two upper guide rail raceways and two lower guide rail raceways being symmetrically provided on both side walls of the linear guide rail, the slider body being mounted on the linear guide rail, characterized in that: The axle up and down groove at two ends embeds respectively in two guide rails up and down of being made up of the groove on the attachment piece, and the tooth on the attachment piece is meshed with tooth on upper sprocket wheel, the lower sprocket. The slider body is symmetrically provided with an upper conduit and a lower conduit distributed at intervals in the upper and lower directions. The upper conduit and the lower conduit are respectively fixed in the slider body in the longitudinal direction. The upper slider raceway is formed in the upper conduit. Upper air-avoidance grooves communicating with the upper slider raceway are symmetrically provided on the side walls of the upper conduit. The lower slider raceway is formed in the lower conduit. Lower air-avoidance grooves communicating with the lower slider raceway are symmetrically provided on the side walls of the lower conduit. There is an angle of 90 degrees between the upper guide rail raceway and the lower guide rail raceway, and the upper guide rail raceway and the upper ball are matched with a 45° contact angle configuration, and the lower guide rail raceway and the lower ball are also matched with a 45° contact angle configuration; wherein, the upper retainer, the middle retainer and the lower retainer are formed by injecting synthetic resin into the corresponding specified positions using injection molding technology on the basis of a slider body that has been machined to meet technical requirements, and then cooling and demolding.

2. The rolling linear guide pair with an integrated ball circulation retaining structure according to claim 1, characterized in that: An upper arc stopper is provided between the upper limiting raceway and the upper slider raceway, an upper arc raceway is provided on the upper arc stopper, the return device is covered and installed on the upper arc stopper, and an upper turning raceway is formed between the upper arc raceway and the return device.

3. The rolling linear guide pair with an integrated ball circulation retaining structure according to claim 2, characterized in that: A lower arc stopper is provided between the lower limiting raceway and the lower slider raceway, a lower arc raceway is provided on the lower arc stopper, the return device is covered and installed on the lower arc stopper, and a lower turning raceway is formed between the lower arc raceway and the return device.

4. The rolling linear guide pair with an integrated ball circulation retaining structure according to claim 1, characterized in that: The upper retaining frame is provided with upper grooves distributed along the longitudinal direction, and the lower retaining frame is provided with lower grooves distributed along the longitudinal direction.

5. The rolling linear guide pair with an integrated ball circulation retaining structure according to claim 1, characterized in that: A sealing end cover is provided on the outer side of each return device, and a screw is installed on each sealing end cover. One end of the screw passes through the return device and is fixed on the slider body.

6. The rolling linear guide pair with an integrated ball circulation retaining structure according to claim 1, characterized in that: Two reinforcing ribs are fixed at intervals on the upper side surface of the inner cavity of the slider body. The two reinforcing ribs are integrally formed with the slider body, and a weight-reducing groove is formed between the two reinforcing ribs.

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