High-precision linear motion track structure

Abstract

The utility model relates to the technical field of linear motion tracks, in particular to a high-precision linear motion track structure which comprises a base and a sliding seat, a U-shaped groove is formed in the base in a concave mode, first arc grooves are formed in the two opposite side walls of the U-shaped groove in a concave mode, the sliding seat is arranged in the U-shaped groove, and second arc grooves are formed in the two opposite side walls of the sliding seat. The two first arc grooves and the two second arc grooves are aligned respectively, the two groups of aligned first arc grooves and second arc grooves form two groups of first circular channels respectively, a plurality of steel balls in close contact are arranged in the two groups of first circular channels, and the diameters of the steel balls are matched with the inner diameters of the first circular channels; and limiting blocks are arranged at the positions, at the two ends of the two second arc grooves, of the sliding seat, the limiting blocks penetrate into the first arc grooves, and the multiple steel balls are located between the limiting blocks at the two ends of the second arc grooves, high-straightness movement of the sliding seat is achieved, dependence on the technology of assembling personnel during assembling is reduced, and the sliding seat is suitable for mass production.

Description

Technical Field

[0001] This application relates to the technical field of linear motion tracks, and more specifically, to a high-precision linear motion track structure. Background Technology

[0002] Linear motion tracks, also known as linear guides or linear slides, are mechanical devices used to support and guide moving parts in reciprocating linear motion in a given direction. They are widely used in various mechanical structures requiring high precision and stability, such as CNC machine tools, printing presses, automated production lines, bending machines, and laser welding machines.

[0003] The assembly accuracy of linear motion tracks has a significant impact on the straightness of moving parts. In related technologies, the manufacture of linear motion mechanisms usually requires technicians to purchase standard linear guides and assemble the self-made linear motion tracks. However, assembling the linear guides to the base usually requires screw locking operations, which require machining matching threaded holes on both the linear guides and the base, and precise screw tightening during the assembly process. To achieve high installation accuracy and ensure high straightness of moving parts, the assemblers need to have a high level of experience. The assembly and debugging of linear motion tracks are highly dependent on the assemblers' skills, which is not conducive to the mass production of linear motion mechanisms. Utility Model Content

[0004] To address the issue that the assembly and debugging of linear motion tracks in related technologies heavily rely on the skills of assembly personnel, which is detrimental to the mass production of linear motion mechanisms, this application provides a high-precision linear motion track structure.

[0005] A high-precision linear motion track structure includes a base and a sliding seat. The base has a U-shaped groove and first arc grooves on opposite side walls of the U-shaped groove. The sliding seat is disposed in the U-shaped groove, and second arc grooves are provided on opposite side walls of the sliding seat. The two first arc grooves and the two second arc grooves are aligned, forming two sets of first circular channels. Several steel balls are arranged in close contact within each set of first circular channels. The diameter of the steel balls matches the inner diameter of the first circular channel. Limiting blocks are provided at both ends of the two second arc grooves on the sliding seat. The limiting blocks penetrate into the first arc grooves, and the steel balls are positioned between the limiting blocks at both ends of the second arc grooves.

[0006] Preferably, a second circular channel is provided inside the sliding seat on one side corresponding to each of the two first circular channels. The inner diameter of the second circular channel is equal to that of the first circular channel. Furthermore, a semi-circular connecting channel is provided at both ends of the two second circular channels inside the sliding seat. The ends of the first and second circular channels that point in the same direction are connected through the circular connecting channel. The inner diameter of the circular connecting channel is equal to that of the second circular channel. Several closely contacting steel balls are also arranged inside the circular connecting channel and the second circular channel.

[0007] Preferably, the sliding seat includes a body, a cover, and a connecting body. Two second arcuate grooves are respectively disposed on opposite sides of the body and penetrate through both ends of the body. Two second arcuate channels are disposed inside the body and penetrate through both ends of the body. There are two connecting bodies, which are respectively locked to both ends of the body by bolts. There are two covers, each of which is provided with a receiving groove for accommodating the connecting body. The two covers are respectively locked to both ends of the body by bolts. A circular connecting channel is formed between the cover and the connecting body, so that the ends of the first circular channel and the second circular channel pointing in the same direction are connected. Limiting blocks at both ends of the second arcuate groove are respectively formed on the sidewalls of the two covers.

[0008] Preferably, the connecting body includes a connecting piece and two semi-circular protrusions formed on the connecting piece, and each semi-circular protrusion is located between a first circular channel and a second circular channel. A third arc groove is recessed on the peripheral wall of the semi-circular protrusion. The receiving groove is divided into a part for receiving the connecting piece and a part for receiving the semi-circular protrusion. A fourth arc groove is formed in the part of the receiving groove for receiving the semi-circular protrusion. The fourth arc groove and the third arc groove are connected to form a circular connecting channel.

[0009] Preferably, the base includes an aluminum base body made of aluminum alloy, the U-shaped groove is disposed on the aluminum base body, and the aluminum base body has a first groove recessed on both sides of the U-shaped groove, and a first steel strip is embedded in each of the two first grooves, and the first arc groove is disposed on the first steel strip.

[0010] Preferably, the body includes an aluminum mounting block made of aluminum alloy, with second grooves recessed on opposite sides of the aluminum mounting block, and a second steel strip embedded in each of the two second grooves. The second arc groove is disposed on the second steel strip, and the cover and the connecting body are also made of aluminum alloy.

[0011] Preferably, both the base and the sliding seat are formed by high-precision grinding.

[0012] In summary, this application includes at least one of the following beneficial technical effects:

[0013] 1. By rolling the steel ball in the circular channel, the friction between the sliding seat and the base is reduced, improving motion accuracy and stability. The alignment design of the U-shaped groove and the arc groove simplifies the assembly process, reduces the dependence on the assembly personnel's skills, and is suitable for mass production. The design of the limit block prevents the steel ball from falling off, ensuring the long-term stable operation of the motion track. The structural design of the base and the sliding seat facilitates standardized production and reduces manufacturing costs.

[0014] 2. By setting up a second circular channel and a circular connecting channel to connect the first and second circular channels, a racetrack-shaped steel ball circulation channel is formed to achieve the circulation of steel balls. The design of the steel ball circulation channel reduces the collision between steel balls. Through the circulation of steel balls, friction is reduced, motion accuracy is improved, service life is extended, load-bearing capacity is enhanced, and continuous, high-speed motion is supported.

[0015] 3. The sliding seat includes a body, a cover, and a connecting body. The sliding seat is designed as a split type, and the cover and the connecting body are both bolted to the body, which facilitates the processing of the second circular channel and the circular connecting channel, thus enabling the maintenance of the steel ball.

[0016] 4. The base and sliding seat are mostly made of aluminum alloy, which makes the overall strength of the motion track high and light. The steel balls are supported by embedded steel bars, which are wear-resistant and improve the life of the motion track. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a high-precision linear motion track structure according to this embodiment.

[0018] Figure 2 This is a schematic diagram of the connection structure between the main body and the connected body in this embodiment.

[0019] Figure 3 This is a schematic diagram of the cover structure in this embodiment.

[0020] Reference numerals: 1. Base; 11. Aluminum base; 111. U-shaped groove; 112. First groove; 12. First steel bar; 121. First arc groove; 2. Sliding seat; 21. Body; 211. Aluminum mounting block; 2111. Second groove; 2112. Second circular channel; 212. Second steel bar; 2121. Second arc groove; 22. Cover; 221. Receiving groove; 222. Fourth arc groove; 223. Limiting block; 23. Connecting body; 231. Connecting piece; 232. Semi-circular protrusion; 2321. Third arc groove. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Reference Figure 1 A high-precision linear motion track structure includes a base 1 and a sliding seat 2. The base 1 includes an aluminum seat body 11 made of aluminum alloy. The aluminum seat body 11 is recessed with a U-shaped groove 111, and first grooves 112 are recessed on both sides of the U-shaped groove 111. A first steel bar 12 is embedded in each of the two first grooves 112. The first steel bar 12 is provided with a first arc groove 121 that extends along its length and passes through both ends of its first arc groove 121.

[0023] Reference Figure 1-3 The sliding seat 2 includes a body 21, a cover 22, and a connecting body 23. The body 21 includes an aluminum mounting block 211 made of aluminum alloy. The cover 22 and the connecting body 23 are also made of aluminum alloy. The aluminum mounting block 211 has a second groove 2111 extending through both ends on opposite sides. A second steel strip 212 is embedded in each of the two second grooves 2111. Each of the two second steel strips 212 has a second arc groove 2121 extending along its length and extending through both ends. An aluminum mounting block 211 is disposed in a U-shaped groove 111 recessed in an aluminum base 11, and two first arc grooves 121 and two second arc grooves 2121 are aligned respectively. The two sets of aligned first arc grooves 121 and second arc grooves 2121 respectively form two sets of first circular channels. A second circular channel 2112 is provided inside the aluminum mounting block 211 on one side corresponding to the two first circular channels respectively. The inner diameter of the first circular channel is equal to the inner diameter of the second circular channel 2112.

[0024] Reference Figure 2There are two connecting bodies 23, each including a connecting piece 231 and two semi-circular protrusions 232 formed on the connecting piece 231. The semi-circular protrusions 232 have a third arc groove 2321 recessed on their peripheral walls. The two connecting pieces 231 are respectively bolted to both ends of the aluminum mounting block 211. One end of each of the two third arc grooves 2321 is positioned opposite to two second circular channels 2112 on the aluminum mounting block 211 and communicates with the port of the second circular channel 2112. The other end of each of the two third arc grooves 2321 is positioned opposite to a first circular channel and communicates with the port of the first circular channel. There are also two covers 22, which are also bolted to the aluminum mounting block. At both ends of 211, the cover 22 is provided with receiving grooves 221. The receiving grooves 221 are divided into a part for receiving connecting piece 231 and a part for receiving semi-circular protrusion 232. The receiving grooves 221 receive the cover 22, achieving installation avoidance. The receiving grooves 221 form a fourth arc groove 222 in the part for receiving semi-circular protrusion 232. The fourth arc groove 222 and the third arc groove 2321 are connected to form a circular connecting channel. The inner diameter of the circular connecting channel is equal to the inner diameter of the first circular channel and the second circular channel 2112. The first circular channel, the second circular channel 2112 and the circular connecting channel form a racetrack-shaped circulation channel. Several closely arranged steel balls are arranged in the racetrack-shaped circulation channel, and the racetrack-shaped circulation channel allows the steel balls to circulate and roll.

[0025] Reference Figure 1 and Figure 3 Limiting blocks 223 are provided on both sides of the two covers 22. The two limiting blocks 223 are inserted into the two first arc grooves 121 respectively, so that the two ends of the two second arc grooves 2121 are limited by limiting blocks 223 to limit the steel ball, so that the steel ball cannot get out of the second arc groove 2121. The limiting blocks 223 are part of the fourth arc groove 222, thus guiding the steel ball to circulate.

[0026] The base 1 and sliding seat 2 of the above structure are both formed by high-precision grinding, which makes the base 1 and sliding seat 2 highly accurate and easy to assemble precisely.

[0027] This application reduces friction between the sliding seat 2 and the base 1 by allowing steel balls to roll within a circular channel, thereby improving motion accuracy and stability. The alignment design of the U-shaped groove 111 and the arc groove simplifies the assembly process, reduces reliance on assembly personnel's skills, and is suitable for mass production. The design of the limiting block 223 prevents steel balls from falling off, ensuring long-term stable operation of the motion track. The structural design of the base 1 and the sliding seat 2 facilitates standardized production and reduces manufacturing costs. By setting a second circular channel 2112 and a circular connecting channel to connect the first and second circular channels 2112, a racetrack-shaped steel ball circulation channel is formed, enabling the steel ball to circulate. The design of the steel ball circulation channel reduces mutual collisions between the steel balls. Through the circulating rolling of the steel balls, friction is reduced, motion accuracy is improved, service life is extended, load-bearing capacity is enhanced, and continuous, high-speed motion is supported. The sliding seat 2 includes a body 21, a cover 22, and a connecting body 23. The sliding seat 2 is designed as a separate unit, with the cover 22 and the connecting body 23 both bolted to the body 21. This facilitates the machining of the second circular channel 2112 and the circular connecting channel, which are used to maintain the steel balls. The base 1 and the sliding seat 2 are mostly made of aluminum alloy, resulting in a high-strength, lightweight, and durable motion track. The embedded steel bars support the steel balls, and their wear resistance extends the lifespan of the motion track.

[0028] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision linear motion track structure, characterized in that: The device includes a base and a sliding seat. The base has a U-shaped groove and first arc grooves on opposite side walls of the U-shaped groove. The sliding seat is disposed within the U-shaped groove, and second arc grooves are provided on opposite side walls of the sliding seat. The two first arc grooves and the two second arc grooves are aligned, forming two sets of first circular channels. Several steel balls are arranged in close contact within each set of first circular channels. The diameter of the steel balls matches the inner diameter of the first circular channel. Limiting blocks are provided at both ends of the two second arc grooves on the sliding seat. The limiting blocks penetrate into the first arc grooves, and the steel balls are positioned between the limiting blocks at both ends of the second arc grooves.

2. The high-precision linear motion track structure according to claim 1, characterized in that: Inside the sliding seat, a second circular channel is provided on one side corresponding to each of the two first circular channels. The inner diameter of the second circular channel is equal to that of the first circular channel. At both ends of the two second circular channels, a semi-circular connecting channel is provided inside the sliding seat. The ends of the first and second circular channels that point in the same direction are connected through the circular connecting channel. The inner diameter of the circular connecting channel is equal to that of the second circular channel. Several closely contacting steel balls are also arranged inside the circular connecting channel and the second circular channel.

3. The high-precision linear motion track structure according to claim 2, characterized in that: The sliding seat includes a body, a cover, and a connecting body. Two second arcuate grooves are respectively disposed on opposite sides of the body and penetrate through both ends of the body. Two second arcuate channels are disposed inside the body and penetrate through both ends of the body. There are two connecting bodies, which are respectively bolted to both ends of the body. There are two covers, each of which is provided with a receiving groove for accommodating the connecting body. The two covers are respectively bolted to both ends of the body. A circular connecting channel is formed between the cover and the connecting body, connecting the ends of the first circular channel and the second circular channel that point in the same direction. Limiting blocks at both ends of the second arcuate groove are respectively formed on the sidewalls of the two covers.

4. The high-precision linear motion track structure according to claim 3, characterized in that: The connecting body includes a connecting piece and two semi-circular protrusions formed on the connecting piece. Each semi-circular protrusion is located between a first circular channel and a second circular channel. A third arc groove is recessed on the peripheral wall of the semi-circular protrusion. The receiving groove is divided into a part for receiving the connecting piece and a part for receiving the semi-circular protrusion. A fourth arc groove is formed in the part of the receiving groove for receiving the semi-circular protrusion. The fourth arc groove and the third arc groove are connected to form a circular connecting channel.

5. The high-precision linear motion track structure according to claim 1, characterized in that: The base includes an aluminum base body made of aluminum alloy, the U-shaped groove is disposed on the aluminum base body, and the aluminum base body has a first groove recessed on both sides of the U-shaped groove, and a first steel strip is embedded in each of the two first grooves, and the first arc groove is disposed on the first steel strip.

6. The high-precision linear motion track structure according to claim 3, characterized in that: The main body includes an aluminum mounting block made of aluminum alloy. The aluminum mounting block has a second groove recessed on both sides, and a second steel strip is embedded in each of the two second grooves. The second arc groove is disposed on the second steel strip. The cover and the connecting body are also made of aluminum alloy.

7. The high-precision linear motion track structure according to claim 1, characterized in that: Both the base and the sliding seat are formed by high-precision grinding.

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