Translation mechanism

Abstract

The invention relates to the technical field of guide mechanisms, and discloses a translation mechanism which comprises two longitudinal rails parallel to each other and a tackle arranged between the two rails, and a longitudinal rolling groove is formed in the side, facing the tackle, of each rail; the pulley comprises a frame and two wheel sets arranged on the two sides of the frame respectively, the two wheel sets correspond to the two rolling grooves respectively, each wheel set comprises at least three wheels which are sequentially arranged in the longitudinal direction, the wheels are all rotationally connected with the frame, and the wheels are located in the corresponding rolling grooves respectively. When the pulley moves longitudinally, the wheels roll along the rolling grooves, and the rolling friction force is very small, so that the resistance is very small when the workbench moves, and the movement is more flexible. Even if dust enters the rolling groove, the wheel rolls in the rolling groove, so that abrasion to the edge of the wheel is very small and can be almost ignored, and the service life of the wheel is prolonged.

Description

Technical Field

[0001] This invention relates to the field of guiding structure technology, and more particularly to a translation mechanism. Background Technology

[0002] When a tire changer is in operation, its worktable needs to move horizontally. Currently, this movement is achieved through a dovetail groove guide, where a support frame slides within the groove. Because the support frame and the dovetail groove have a planar contact, the frictional resistance is high, requiring regular lubrication with grease. Wear and tear also increases the gap between the dovetail groove and the support frame, causing the worktable to wobble during operation. Furthermore, since the dovetail groove is close to the ground during use, dust, dirt, or other solid particles can easily enter it, accelerating wear and resulting in a shorter lifespan for this design. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a translation mechanism to solve the problems of high moving resistance, easy wear and short life when the worktable of the current tire changing machine is guided by dovetail groove.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A translation mechanism includes two parallel longitudinal tracks and a trolley disposed between the two tracks. Each track has a longitudinal groove on the side facing the trolley. The trolley includes a frame and two wheel sets respectively disposed on both sides of the frame. The two wheel sets correspond to the two grooves. Each wheel set includes at least three wheels arranged sequentially along the longitudinal direction. The wheels are rotatably connected to the frame and are located in the corresponding grooves. In each wheel set, at least one wheel is in contact with the top surface of the groove and at least two wheels are in contact with the bottom surface of the groove, or at least one wheel in each wheel set is in contact with the bottom surface of the groove and at least two wheels are in contact with the top surface of the groove.

[0005] Furthermore, the wheel includes a second roller, which is coaxially rotatably connected to an axle. The side of the frame is provided with a swing arm rotatably connected to it at one end. An adjusting screw with its end abutting against the other end of the swing arm is threaded onto the frame. The axle is fixedly connected to the middle of the swing arm.

[0006] Furthermore, the second roller is located outside the frame, the swing arm is located inside the frame, and the side of the frame has a through hole at a position corresponding to the wheel axle for the wheel axle to pass through, with a gap between the wheel axle and the through hole.

[0007] Furthermore, the wheel includes a first roller, which is rotatably connected to a sleeve on the same axis. The sleeve is fixedly connected to the frame. A roller is rotatably connected inside the sleeve. The axis of the roller is vertical, and the outer circle of the roller protrudes from the outer end face of the first roller. When the trolley moves, the roller rolls along the side of the groove.

[0008] Furthermore, a support block is provided in the inner hole at the outer end of the sleeve, the roller is rotatably connected to the support block, and a plug is provided in the inner hole of the sleeve, the plug and the support block are connected by a connecting piece.

[0009] Furthermore, the outer end of the sleeve is provided with a first blind hole, and the inner end of the sleeve is provided with a second blind hole. The first blind hole and the second blind hole are connected. The support block is located in the first blind hole, and the plug is located in the second blind hole. One end of the connecting piece is fixedly connected to the support block, and the other end is stuck in the groove of the plug at the end away from the first blind hole. The support block is provided with a positioning groove in the second blind hole for the connecting piece to pass through.

[0010] Furthermore, a retaining ring is fitted on the sleeve, and two baffles are symmetrically fixedly arranged in the inner hole of the retaining ring. The two baffles are arranged radially along the roller and are close to the outer circle of the roller.

[0011] The positive effects of this invention are: This invention features a trolley and a track. The track has grooves, and the trolley has wheels. When the trolley moves longitudinally, the wheels roll along the grooves, resulting in very low rolling friction and minimal resistance to the movement of the worktable, making it more flexible. Even if dust enters the grooves, the wear on the wheel edges is negligible due to the rolling motion, thus extending the lifespan of the invention. Furthermore, the wheels rest against the top and bottom surfaces of the grooves, ensuring stable translation of the trolley and preventing the worktable from wobbling under stress during operation. The wheel height can be adjusted using adjusting screws, allowing each wheel to rest against the top and bottom surfaces of the grooves, facilitating adjustment of any gaps created between the wheels and the top surface of the grooves. Rollers are also provided on the wheels; as the trolley moves horizontally, these rollers roll along the sides of the grooves, providing lateral restraint and preventing lateral swaying. Attached Figure Description

[0012] Figure 1 This is a perspective view of the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the bottom structure of the present invention; Figure 4 This is a side view of the present invention; Figure 5 yes Figure 4A cross-sectional view of the AA section; Figure 6 yes Figure 5 Enlarged view in the upper left corner; Figure 7 yes Figure 5 A sectional view of the BB section; Figure 8 This is a schematic diagram showing the connection between the first roller and the sleeve; Figure 9 yes Figure 8 Exploded view; Figure 10 This is a schematic diagram showing the connection between the support block and the plug via a connecting piece; Figure 11 It is a three-dimensional diagram of the sleeve; In the picture: 1. Baffle; 2. Track; 3. Trolley; 4. First roller; 5. Second roller; 6. Frame; 7. Axle; 8. Swing arm; 9. Through hole; 10. Axle; 11. End plate; 12. Sleeve; 13. Roller; 14. Support block; 15. Plug; 16. Connecting piece; 17. Snap ring; 18. Retaining ring; 19. Adjusting screw; 20. Positioning groove; 21. Baffle; 22. Notch; 23. Groove; 24. First blind hole; 25. Second blind hole. Detailed Implementation

[0013] For ease of description, in the following description, the length direction of track 2 is "longitudinal", and the direction perpendicular to the length direction of track 2 in the horizontal plane is "lateral".

[0014] Example 1 like Figure 1 and Figure 2 As shown, a translation mechanism includes two parallel longitudinal tracks 2 arranged front to back and a trolley 3 arranged between the two tracks 2. The bottoms of the two tracks 2 are fixedly connected by a transverse connecting plate. Each track 2 has a longitudinal groove 23 on the side facing the trolley 3. The left end of the two tracks 2 is fixedly connected to a baffle 1 by screws for longitudinally limiting the trolley 3.

[0015] The trolley 3 includes a frame 6 and two wheel sets respectively disposed on the front and rear sides of the frame 6. The frame 6 is welded from steel plates, and the tire changer's workbench is mounted on the frame 6. The two wheel sets correspond to two roller grooves 23, and each wheel set includes four wheels arranged longitudinally. All wheels are rotatably connected to the frame 6, and each wheel is located in its corresponding roller groove 23. The rotation axes of the two middle wheels in each wheel set are vertically offset from the rotation axes of the other two wheels, so that the two middle wheels are in contact with the bottom surface of the roller groove 23, and the other two wheels are in contact with the top surface of the roller groove 23.

[0016] When the worktable moves longitudinally under the drive of the trolley 3, the wheels roll along the chute 23. The rolling friction is very small, resulting in minimal resistance during worktable movement and more flexible movement. Even if dust enters the chute 23, the wear on the wheel edges is minimal and negligible due to the rolling action of the wheels within the chute 23, thus extending the service life of the invention. Furthermore, the wheels abut against the top and bottom surfaces of the chute 23, ensuring stable translation of the trolley 3 and preventing the worktable from wobbling under stress during operation.

[0017] Example 2 Combination Figures 3 to 7 As shown, the difference between this embodiment and Embodiment 1 is that: The two middle wheels in each wheel set are second rollers 5. A wheel axle 10 is coaxially connected to the center of each second roller 5. A rotating shaft 7 is threadedly fixed to the side of the frame 6 at a position corresponding to each second roller 5. A swing arm 8 is provided on the side of the frame 6, one end of which is rotatably connected to the rotating shaft 7. An end plate 11 is welded to the other end of the swing arm 8. An adjusting screw 19 is threaded through the top of the frame 6, with the bottom end of the adjusting screw 19 abutting against the top surface of the end plate 11. The wheel axle 10 is fixedly connected to the middle of the swing arm 8.

[0018] The second roller 5 is located outside the frame 6, the swing arm 8 is located inside the frame 6, and the side of the frame 6 has a through hole 9 at a position corresponding to the wheel axle 10. The wheel axle 10 has a through hole 9, and there is a gap between the wheel axle 10 and the through hole 9.

[0019] Tighten the adjusting screw 19. Since the bottom of the second roller 5 is against the bottom surface of the groove 23, the frame 6 will rise, which will cause the other two wheels to move up and the edges of the two wheels to abut the top surface of the groove 23. This makes it easier to adjust the gap after the gap is created between the wheel and the top surface of the groove 23.

[0020] Example 3 Combination Figures 8 to 11 As shown, the difference between this embodiment and Embodiment 2 is that: In each wheel set, the two outermost wheels are the first rollers 4, with the outer end faces of the first rollers 4 and the second rollers 5 located in the same vertical plane. A sleeve 12 is coaxially rotatably connected to the first rollers 4, with the axis of the sleeve 12 positioned laterally. The inner end of the sleeve 12 is fixedly connected to the frame 6. A roller 13 is rotatably connected inside the sleeve 12, with the axis of the roller 13 being vertical. The outer circle of the roller 13 protrudes beyond the outer end face of the first rollers 4. When the trolley 3 moves, the roller 13 rolls along the side of the groove 23.

[0021] When the trolley 3 moves horizontally, the roller 13 rolls along the side of the groove 23, thereby limiting the trolley 3 laterally and preventing the trolley 3 from swaying laterally. At the same time, it can prevent the outer end faces of the first roller 4 and the second roller 5 from being worn due to contact with the side of the groove 23 and prevent the trolley 3 from moving unevenly due to friction.

[0022] A grooved support block 14 is provided in the inner hole at the outer end of the sleeve 12. The roller 13 is located in the groove and is rotatably connected to the support block 14. A plug 15 is provided in the inner hole of the sleeve 12. The plug 15 and the support block 14 are connected by a connecting piece 16.

[0023] The sleeve 12 has a first blind hole 24 at its outer end and a second blind hole 25 at its inner end. The first blind hole 24 and the second blind hole 25 are coaxial and interconnected. The diameter of the first blind hole 24 is larger than the diameter of the second blind hole 25. The support block 14 is located inside the first blind hole 24, and the plug 15 is located inside the second blind hole 25. The connecting piece 16 is partly circular and partly elongated. The circular part of the connecting piece 16 is fixedly connected to the end of the support block 14 away from the roller 13. The end of the plug 15 away from the support block 14 has a cross-shaped groove, and the end of the connecting piece 16 away from the support block 14 is engaged in the groove. The support block 14 has a positioning groove 20 in the second blind hole 25, and the middle part of the connecting piece 16 passes through and is engaged in the positioning groove 20.

[0024] Since the connecting piece 16 is locked in the positioning groove 20, the support block 14 can be prevented from rotating, so as to ensure that the axis of the roller 13 always remains vertical, thereby ensuring that the roller 13 rolls smoothly along the side wall of the roller groove 23.

[0025] A retaining ring 18 is fitted onto the sleeve 12. Two retaining plates 21 are symmetrically fixedly arranged in the inner hole of the retaining ring 18. Both retaining plates 21 are arranged radially along the roller 13 and are close to the outer circle of the roller 13. The sleeve 12 has notches 22 at corresponding positions to accommodate the retaining plates 21 and prevent them from rotating. A retaining spring 17 is attached to the outside of the retaining plate 21 on the sleeve 12 for axial positioning of the retaining plate 21.

[0026] The baffle 21 can prevent dust and particles from entering the gaps on both sides of the roller 13, thereby affecting the rotation of the roller 13.

[0027] The above-described embodiments are detailed and specific, illustrating preferred embodiments of the present invention. They are only used to illustrate the technical ideas and features of the present invention, with the aim of enabling those skilled in the art to understand the content of the present invention and implement it accordingly. However, they are not limited to the present invention, and the patent scope of the present invention cannot be limited by this embodiment alone. That is, any equivalent changes or modifications made to the spirit disclosed in the present invention, without departing from the structure of the present invention, such as local improvements within the system and modifications or transformations between subsystems, are still within the patent scope of the present invention.

Claims

1. A translation mechanism, characterized in that, It includes two parallel longitudinal tracks (2) and a trolley (3) set between the two tracks (2). Each track (2) has a longitudinal groove (23) on the side facing the trolley (3). The trolley (3) includes a frame (6) and two wheel sets respectively set on both sides of the frame (6). The two wheel sets correspond to the two grooves (23) respectively. Each wheel set includes at least three wheels arranged in sequence along the longitudinal direction. The wheels are rotatably connected to the frame (6). The wheels are located in the corresponding grooves (23). At least one wheel in each wheel set is in contact with the top surface of the groove (23) and at least two wheels are in contact with the bottom surface of the groove (23), or at least one wheel in each wheel set is in contact with the bottom surface of the groove (23) and at least two wheels are in contact with the top surface of the groove (23).

2. The translation mechanism according to claim 1, characterized in that, The wheel includes a second roller (5), which is rotatably connected to an axle (10) on the same axis. The side of the frame (6) is provided with a swing arm (8) rotatably connected to it. An adjusting screw (19) with its end abutting against the other end of the swing arm (8) is threaded onto the frame (6). The axle (10) is fixedly connected to the middle of the swing arm (8).

3. A translation mechanism according to claim 2, characterized in that, The second roller (5) is located outside the frame (6), the swing arm (8) is located inside the frame (6), and the side of the frame (6) has a through hole (9) for the axle (10) to pass through at a position corresponding to the axle (10). There is a gap between the axle (10) and the through hole (9).

4. A translation mechanism according to claim 1, characterized in that, The wheel includes a first roller (4), which is coaxially rotatably connected to a sleeve (12). The sleeve (12) is fixedly connected to the frame (6). A roller (13) is rotatably connected inside the sleeve (12). The axis of the roller (13) is vertical. The outer circle of the roller (13) protrudes from the outer end face of the first roller (4). When the trolley (3) moves, the roller (13) rolls along the side of the groove (23).

5. A translation mechanism according to claim 4, characterized in that, A support block (14) is provided in the inner hole at the outer end of the sleeve (12). The roller (13) is rotatably connected to the support block (14). A plug (15) is provided in the inner hole of the sleeve (12). The plug (15) and the support block (14) are connected by a connecting piece (16).

6. A translation mechanism according to claim 5, characterized in that, The sleeve (12) has a first blind hole (24) at its outer end and a second blind hole (25) at its inner end. The first blind hole (24) and the second blind hole (25) are connected. The support block (14) is located in the first blind hole (24) and the plug (15) is located in the second blind hole (25). One end of the connecting piece (16) is fixedly connected to the support block (14) and the other end is stuck in the slot of the plug (15) away from the first blind hole (24). The support block (14) has a positioning groove (20) in the second blind hole (25) for the connecting piece (16) to pass through.

7. A translation mechanism according to claim 4, characterized in that, The sleeve (12) is fitted with a retaining ring (18). Two baffles (21) are symmetrically fixed in the inner hole of the retaining ring (18). Both baffles (21) are arranged radially along the roller (13) and are close to the outer circle of the roller (13).

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