CN201125945Y - Ball guide end cap - Google Patents

Abstract

The utility model discloses a ball guide end cover includes end cover body and built-up member, is fixed in linear ball slide rail set's slider on to guide a plurality of balls circulation operation in linear ball slide rail set's roll ditch and backward flow perforation. The end cover body and the assembly part are jointed to form a turning channel for communicating the backflow through hole and the rolling groove so as to allow the balls to pass through. The end cover body is provided with a clamping hook, the assembling part can be clamped on the end cover body, the assembling part can be simultaneously forced on the end surface of the sliding block when the end cover body is fixed on the sliding block, and therefore the end cover is prevented from generating improper vibration when the linear ball sliding rail assembly runs.

Description

Ball guide end cap

technical field

The utility model relates to a linear ball slide rail assembly, in particular to a ball guide end cover arranged in the linear ball slide rail assembly.

Background technique

Linear ball slide rail is an important power transmission component in the machinery industry, and its application scope covers pan-mechanical fields such as precision machinery, automation industry, medical equipment and aerospace industry. The main function of the linear ball slide is to use the ball as the contact medium between the two components that need to move relative to each other, so that the two components do not directly contact the entire surface. Therefore, the friction resistance generated when the components move relatively will be reduced, making the transmission mechanism move more smoothly and labor-saving, thereby saving energy. In addition, due to the reduction of friction, the situation of wear and excessive temperature between components is also greatly improved, which helps to improve the accuracy and service life of the transmission mechanism, and can provide the transmission mechanism to run at a higher moving speed.

A generally known linear ball slide assembly includes a slide rail, a slider and several balls running between the slide rail and the slider. There is a ball circulation structure between the slider and the slide rail to guide the ball backflow, so that the ball can circulate between the slider and the slide rail, so as to reduce the friction resistance of the slider moving relative to the slide rail. As far as the common ball circulation structure is concerned, it can be roughly divided into two parts: a straight path and a steering path that guides the ball to turn. The linear path is usually set on the slider and the slide rail, which can be directly drilled with a machine tool, which is relatively easy to manufacture. The steering path is usually set in the end cap at the end of the slider, which is difficult to manufacture.

At the beginning, most of the industry directly drilled the steering path in the end cover to match the shape of the ball. However, this manufacturing method not only makes the processing procedures quite cumbersome, but also the steering path cannot have a complete arc path that matches the ball. Can cause the balls to not run smoothly and produce excessive noise. Later, in order to simplify the processing procedures and form a complete arc path for the balls to pass through, the industry used the method of separate injection molding of the end caps to form half of the turning path, and then combined them into a complete arc path matching the balls. However, this separable end cover requires high processing precision between components, which increases the cost of processing and manufacturing. In addition, when the linear ball slide assembly is actually in operation, once the tolerance between the end cover components is slightly too large, it is easy to cause the end cover to vibrate relative to the slider, making the balls unable to run smoothly and causing excessive wear and tear of the balls. And make noise, which will affect the overall operating performance and life of the linear ball slide assembly.

Contents of the invention

The purpose of this utility model is to provide a ball guide end cover to solve the problem that the separate end cover in the known technology is easily affected by the component tolerance, so that the end cover will produce abnormalities relative to the slider when the linear ball slide assembly is running. Vibration etc.

In order to achieve the above object, the present invention provides a ball guide end cover, which is applied in a linear ball slide assembly, wherein the ball guide end cover includes two assembly parts and an end cover body. The linear ball slide assembly includes a slide rail, a slide block sliding along the slide rail and several balls. The sliding rail and the sliding block are combined to form at least two rolling grooves for the balls to run, and the sliding block has at least two return holes passing through the two ends of the sliding block. The ball guide end cover of the utility model is used to guide the balls to circulate in the rolling groove and the return hole, and reduce the frictional resistance when the slider moves relative to the slide rail. Each assembly part has a fastening groove respectively. The end cover body has two hooks, and each hook is inserted into the fastening groove of the assembly to fasten the assembly to one side of the end cover body. The fitting between the end cover body and the assembling part forms at least one diversion channel communicating with the return flow hole and the rolling groove for the passage of the balls. The end cover body is fixed on the slide block, and the assembly parts are pressed against the end surface of the slide block.

The effect of the utility model is that the assembly is fixed on the end cover body by the hook, and when the end cover body is fixed on the slider, the assembly can be pressed against the end face of the slider at the same time, so that the assembly and the end cover body The more stable configuration on the slider can not only avoid the undue vibration of the end cover body and assembly parts during the operation of the linear ball slide assembly, but also reduce the tolerance requirements for the end cover body and assembly parts.

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the utility model.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the ball guide end cover of the present invention;

Fig. 2 is a three-dimensional exploded view of the end cover body, guide tube and assembly parts in the utility model;

Fig. 3 is a three-dimensional schematic diagram of the guide tube assembled in the end cover body in Fig. 2;

Fig. 4 is a three-dimensional schematic diagram of the ball guide end cover assembled on the linear ball slide rail assembly of the present invention;

Fig. 5 is a three-dimensional exploded view of the linear ball slide assembly in the present invention;

Fig. 6 is a three-dimensional exploded view of the ball running on the ball guide end cover in the utility model;

Fig. 7 is a schematic cross-sectional view of the linear ball slide assembly in the present invention;

8 is a schematic cross-sectional view of the linear ball slide assembly of the present invention.

Among them, reference signs:

10 slide rails

11 outer rolling groove

12 balls

20 sliders

21 inner rolling groove

22 screw holes

23 Backflow perforation

24 screw

241 thread groove

25 Dust-proof wiper

251 threaded rib

30 End cover body

31 Screws

32 assembly parts

321 buckle groove

33 turn channel

34 internal binding column

341 Connecting hole

35 outer binding column

351 Connecting slot

36 Dustproof sheet

361 boss

37 hook

50 guide tube

51 Positioning Department

52 Tongue

Detailed ways

Please refer to Fig. 1, Fig. 2 and Fig. 3, which is a ball guide end cover provided by the utility model, which is applied to a linear ball slide rail assembly (as shown in Fig. 4), wherein the ball guide end cover includes An end cap body 30 , two assembly parts 32 and several guide tubes 50 . Although the utility model takes the ball guide end cover equipped with the guide tube 50 as the specific embodiment, the utility model can also directly use the end cover body 30 and the assembly part 32 without the guide tube 50 implement.

Please refer to FIG. 4 and FIG. 5 , which are a three-dimensional schematic diagram and a three-dimensional exploded view of the linear ball slide assembly. The linear ball slide assembly includes a slide rail 10 , a slide block 20 sliding along the slide rail, and several balls 12 . The sliding rail 10 and the sliding block 20 are combined to form four rolling grooves for the balls 12 to run, and each rolling groove includes an outer rolling groove 11 opened on the inner side of the sliding rail 10 and an inner rolling groove opened on the outer side of the slider 20. The rolling grooves 21 are arranged in pairs. Although four rolling grooves are used as a specific embodiment in the present invention, the number of rolling grooves is not limited to four, and the number of rolling grooves can also be one pair or more than two pairs. The slider 20 has four backflow holes 23 and two screw holes 22 respectively penetrating both ends of the slider 20 , wherein the backflow holes 23 are set corresponding to the rolling grooves, and the number of the backflow holes 23 increases or decreases according to the number of the rolling grooves. The ball guide end caps of the present invention are fixed on both ends of the slider 20 to guide the balls 12 to circulate in the corresponding rolling grooves and return holes 23 in the linear ball slide assembly. The screw 24 passes through the end cover 30 and the slider 20 , wherein there is a threaded groove 241 for accommodating balls between the screw 24 and the slider 20 , and a circulation structure is provided inside the slider 20 so that the balls can circulate in the threaded groove 241 . Therefore, the screw rod 24 can rotate relative to the slider 20 and the slide rail 10 , and the slider 20 can slide relative to the screw rod 24 . Two ends of the slider 20 respectively have a dust-proof wiper 25 , and the inner peripheral surface of the dust-proof wiper 25 has a threaded rib 251 . The dust-proof wiper 25 can be installed on the end surface of the slider 20 , and can also be installed on the inner side of the end cover body 30 . The thread rib 251 is used to extend into the thread groove 241 of the screw rod 24 to scrape off the dust or foreign matter on the surface of the thread groove 241 to prevent the dust or foreign matter from entering the slider 20 and affecting the ball running.

Please refer to Figure 2, Figure 3 and Figure 5. Each end cap body 30 has two screw components 31 , a dustproof sheet 36 and two hooks 37 . The dust-proof sheet 36 can be but not limited to metal material, and can scrape dust or foreign matter on the outer rolling groove 11 to prevent dust or foreign matter from entering the inside of the end cover body 30 and the slider 20 . Each screw member 31 passes through the end cover body 30 and the assembly part 32 and is screwed into the corresponding screw hole 22 on the slider 20 to fix the end cover body 30 and the assembly part 32 on two ends of the slider 20 . Each dust-proof sheet 36 is fixed on the outside of the end cover body 30 by means of screws 31 , wherein the dust-proof sheet 36 has two protrusions 361 extending away from the slider 20 . The length of the boss 361 protruding from the end cover body 30 is greater than the length of the screw 31 exposed from the end cover body 30, so as to avoid the external force directly hitting the screw 31 and being transmitted to the end cover body 30, wherein the boss 361 can be but not limited to engineering plastic material. The hooks 37 extend from two side edges of the end cover body 30 toward the slider 20 .

Please refer to FIG. 2 , FIG. 3 and FIG. 5 , each assembly part 32 is installed on the end cover body 30 respectively, and each assembly part 32 has a locking groove 321 corresponding to the hook 37 . The hook 37 of the end cover body 30 is inserted into the fastening groove 321 of the assembly part 32 to fix the assembly part 32 on one side of the end cover body 30 . When the end cover body 30 is fixed on the slider 20 , the end cover body 30 also presses the assembly parts 32 against the end surface of the slider 20 at the same time. Each assembly part 32 is combined with the end cover body 30 to form two diversion passages 33 , wherein each diversion passage 33 communicates with the corresponding return hole 23 and the rolling groove for the passage of the ball 12 . The assembly part 32 is combined with the end cover body 30 to form four inner coupling columns 34 and four outer coupling columns 35 facing the slider 20 . A part of each inner coupling column 34 is located on the end cover body 30 , and another part is located on the assembly part 32 . When the assembly part 32 is assembled to the body of the end cover 30 , a communication hole 341 is formed inside each inner coupling column 34 . Each inner coupling post 34 is used to embed in the slider 20 to position the end cover body 30 and the assembly 32 on the slider 20, and make the communication hole 341 communicate with the backflow hole 23 of the slider 20 and one end of the diversion channel 33 (referred to as corresponding to one end of the backflow hole 23). Each outer coupling column 35 is located on the outer edge of the assembly part 32 , and each outer coupling column 35 defines a communicating groove 351 . Each outer connecting column 35 is used to embed in the slider 20 to position the end cover body 30 and the assembly part 32 on the slider 20, and make the communication groove 351 communicate with the inner rolling groove 21 of the slider 20 and the other end of the steering channel 33 (refers to one end corresponding to the rolling groove). Therefore, each turning channel 33 can communicate with the corresponding return hole 23 and the rolling groove in the linear ball slide assembly through the communication hole 341 and the communication groove 351 .

Please refer to FIG. 2 , FIG. 3 and FIG. 5 , the guide tubes 50 are respectively installed on the inner walls of the diversion channels 33 of the end cover body 30 , and the guide tubes 50 are made of metal. The guide tube 50 is a hollow arc-shaped tube for connecting the communication hole 341 and the communication groove 351 . The inner diameter of the guide tube 50 is slightly larger than the diameter of the ball 12, so that the ball 12 can run smoothly in the guide tube 50 and turn around. When the guide tubes 50 are installed on the end cover body 30, one end of each guide tube 50 corresponds to the return hole 23 of the slider 20, so that the ball 12 can enter and exit the return hole 23 and the guide tube 50 through the communication hole 341, while the other end One end corresponds to the rolling groove of the slide rail 10 and the slider 20 . One end of each guide tube 50 corresponding to the rolling groove has a positioning portion 51 and a tongue portion 52 . The positioning part 51 is inserted into the assembly part 32 to position the guiding tube 50 , and the tongue part 52 extends into the rolling groove to guide the ball 12 to enter and exit the rolling groove and the guiding tube 50 .

Please refer to Fig. 3, Fig. 6, Fig. 7 and Fig. 8, when the slider 20 moves relative to the slide rail 10, the ball 12 will roll in the rolling groove between the slider 20 and the slide rail 10, so as to move on the slide rail 10. Sliders 20 are carried on the rails 10 . When the ball 12 runs to the end of the rolling groove, it first enters between the communication groove 351 of the assembly part 32 and the outer rolling groove 11 of the slide rail 10 , and is guided into the guiding tube 50 by the tongue 52 of the guiding tube 50 . Then, the ball 12 continues to run in the guide tube 50 and changes direction, and enters one end of the return hole 23 of the slider 20 through the communication hole 341 . When the ball 12 runs to the other end of the return hole 23 , it will first enter the guide tube 50 through the communication hole 341 of the assembly, and then continue to run and change direction in the guide tube 50 . Next, the balls 12 are guided by the tongue portion 52 of the guide pipe 50 into between the communication groove 351 and the outer rolling groove 11 of the slide rail 10 , and then return to the rolling groove through the communication groove 351 . The balls 12 can continuously circulate in the linear ball slide rail assembly by virtue of the circulation path formed by the connection of the aforementioned return hole 23 , the communication hole 341 , the guide pipe 50 , the communication groove 351 and the rolling groove.

In the utility model, the assembly part 32 is fixed on the end cover body 30 by the hook 37, and when the end cover body 30 is fixed on the slider 20, the assembly part 32 can be pressed against the end surface of the slider 20 at the same time, so that the assembly part 32 and the end cover body 30 are more firmly arranged on the slider 20, which can not only prevent the end cover body 30 and the assembly 32 from generating undue vibration when the linear ball slide assembly is running, but also reduce the pairing between the end cover body 30 and the assembly 32. Tolerance requirements.

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (10)

1. A ball guide end cover, which is used in a linear ball slide rail assembly. The linear ball slide rail assembly includes a slide rail, a slider sliding along the slide rail, and several balls. The slide rail and the The sliding blocks are joined together to form at least two rolling grooves for the ball to run, and the sliding block has at least two return holes passing through both ends of the sliding block, wherein the ball guide end cover is used to guide the ball to circulate in the The rolling groove and the return hole are characterized in that the ball guiding end cover includes: two assemblies, each of which has a retaining groove; and An end cover body has two hooks, the hooks are inserted into the fastening groove to fasten the assembly on one side of the end cover body, and the end cover body and the assembly are mated to form at least one communication channel. The return hole and the turning channel of the rolling groove for the ball to pass through, wherein the end cover body is fixed to the slider and the assembly is pressed against the end surface of the slider. 2. The ball guiding end cap according to claim 1, further comprising at least two guiding tubes through which the balls pass, and each of the guiding tubes is respectively installed on the inner wall of the turning channel. 3. The ball guide end cap according to claim 2, wherein each guide tube has a tongue, and the tongue extends into the rolling groove to guide the ball in and out of the rolling groove and the guide Tube. 4. The ball guiding end cap according to claim 2, wherein the guiding tube is made of metal. 5. The ball guiding end cap according to claim 1, characterized in that, the end cap body is combined with the assembly to form several inner coupling columns, and the inner coupling columns are embedded in the slider to position the end cap body and the assembly. the assembly. 6 . The ball guiding end cap according to claim 5 , wherein the inner connecting column has a communication hole, and the communication hole connects the return through hole and the turning channel. 7. The ball guide end cap according to claim 1, wherein the assembly part has several outer coupling posts, and the outer coupling posts are inserted into the slider to position the assembly part. 8. The ball guiding end cover according to claim 7, wherein the outer connecting column has a communication groove, and the communication groove connects the rolling groove and the turning channel. 9. The ball guide end cover according to claim 1, further comprising a dust-proof sheet, and the dust-proof sheet has at least one protrusion extending away from the slider. 10. The ball guiding end cap according to claim 1, further comprising at least two screw parts, each of which is screwed into the slider through the end cap body and each of the assembly parts, The end cover body and each assembly are fixed on the slider.

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