A synchronous counter-directional sliding device

Abstract

This application relates to a synchronous, opposite-directional sliding device, belonging to the technical field of sliding devices. It includes a base, on which a main roller and an auxiliary roller are mounted, respectively located at opposite ends of the base's length. A fixed seat supporting the main roller is provided on the base. A sliding seat supporting the auxiliary roller is slidably connected to the base. The main roller is rotatably mounted on the fixed seat, and the auxiliary roller is rotatably mounted on the sliding seat. A control belt is slidably connected to the base, connecting the main roller and the auxiliary roller. A rotating component on the base drives the main roller to rotate. When the main roller rotates, two control blocks can slide towards or away from each other under the action of the control belt. A control component on the base controls the sliding of the sliding seat. This application has the effect of reducing the cost of using sliding devices for object docking.

Description

Technical Field

[0001] This application relates to the technical field of sliding devices, and in particular to a synchronous opposite-direction sliding device. Background Technology

[0002] Transmission devices are commonly used in various precision machining machines, such as CNC machining centers and 3D printers, and their main function is to transfer and move objects. Based on the object movement requirements, transmission devices can be divided into transfer devices or docking devices. The former requires only one moving part, while the latter requires two synchronously moving parts in opposite directions.

[0003] Existing transmission devices generally use lead screw drives. If docking is required, a set of left-hand and right-hand lead screws is used to achieve the requirement. However, in actual use, it has been found that the docking position of the left-hand and right-hand lead screws is generally connected by flanges or other connecting parts, which results in some gaps between the two lead screws. When the device is used to dock some objects, this gap will cause docking failure. In addition, the cost of lead screw drives and subsequent maintenance costs are relatively high. Summary of the Invention

[0004] In order to reduce the cost of sliding devices for object docking, this application provides a synchronous opposite sliding device.

[0005] The synchronous and opposite sliding device provided in this application adopts the following technical solution:

[0006] A synchronous opposite sliding device includes a base, on which a main roller and an auxiliary roller are mounted, respectively located at opposite ends of the base along its length. A fixed seat for supporting the main roller is mounted on the base. A sliding seat for supporting the auxiliary roller is slidably connected to the base. The main roller is rotatably mounted on the fixed seat, and the auxiliary roller is rotatably mounted on the sliding seat. A control belt is slidably connected to the base, connecting the main roller and the auxiliary roller. A rotating component for driving the main roller to rotate is mounted on the base. When the main roller rotates, two control blocks can slide towards or away from each other under the action of the control belt. A control assembly for controlling the sliding seat's movement is mounted on the base.

[0007] By adopting the above technical solution, the sliding seat slides along the length of the base under the action of the control component. When the sliding seat slides, it drives the auxiliary roller to move relative to the main roller, thereby adjusting the tension of the control belt and effectively improving the service life of the sliding device. Since the replacement frequency and maintenance cost of the control belt are low, the operating cost of the sliding device for object docking is effectively reduced.

[0008] Preferably, the control component includes a control screw rotatably mounted on a base, a control threaded hole through which the sliding seat is threadedly engaged with the control screw, a control worm gear coaxially fixed on the control screw, and a control worm gear rotatably connected to the base and meshing with the control worm gear, one end of the control worm gear penetrating the base.

[0009] By adopting the above technical solution, when the worm rotates, the control worm wheel rotates under the action of the threaded transmission. When the control worm wheel rotates, it drives the control screw to rotate, thereby enabling the sliding seat to slide along the length direction of the base under the action of the threaded transmission. Since the cooperation between the control worm wheel and the control worm is self-locking, the reliability of the sliding seat being driven to slide by the rotation of the control worm is effectively improved.

[0010] Preferably, the control block is provided with a fitting cavity for the control belt to fit into, the control block near the main roller is provided with a fixing block for fixing the control belt, and the control block near the auxiliary roller is slidably connected with an abutment block for fixing the control belt.

[0011] The abutting block is provided with multiple abutting posts, the control block is provided with a through hole for the abutting posts to slide, the control block is provided with a control elastic element for driving the abutting block to slide toward the control block, and the base is provided with a control element for pushing the abutting block to slide away from the control belt.

[0012] By adopting the above technical solution, the setting of the fixed block makes it difficult for the control block near the main roller to separate from the control belt. The setting of the sliding abutment block allows the locking of the control belt to be released during the sliding of the sliding seat, thereby facilitating the adjustment of the tension of the control belt. By setting the control elastic element, the abutment block can maintain a tight state against the control belt without the action of other external forces, thus improving the reliability of the control block sliding by the control belt.

[0013] Preferably, the control component includes a main slider slidably disposed on a base, the base having a main slide groove for the main slider to slide, and the end of the abutment post located outside the control block having a main sliding inclined surface that cooperates with the main slider. When the main slider slides toward the abutment post, it can push the abutment block to slide away from the control belt.

[0014] A control slider is slidably connected to the base. The base has a control groove for the control slider to slide. The end face of the control worm is flush with the bottom wall of the control groove. A main control block is provided at the end of the main slider away from the abutment post. The base has a main control groove for the main control block to slide. The main control groove is connected to both the control groove and the main slide groove. The side of the main control block facing the control worm has a main control inclined surface. The control slider can slide along the control groove until the main control block is stored in the main control groove. The base has a main control elastic element for pushing the main slider to slide towards the control groove.

[0015] By adopting the above technical solution, during normal use of the sliding device, the control slider slides to fit against the end face of the control worm, making it less susceptible to corrosion from external impurities and extending the service life of the sliding device assembly to a certain extent. This reduces the frequency of parts replacement and thus lowers the operating cost of the sliding device. When it is necessary to adjust the tension of the control belt, the control slider slides towards the main control block until the main control block is completely housed in the main control slot. This allows the operator to rotate the control worm while releasing the restriction of the control belt by the abutment block, making it convenient to use.

[0016] Preferably, the control component further includes an auxiliary slider slidably disposed on the base. The base has an auxiliary sliding groove for the auxiliary slider to slide. A control gear is rotatably connected to the base. The main slider and the auxiliary slider are symmetrically disposed on both sides of the control gear. Both the main slider and the auxiliary slider are provided with control racks that mesh with the control gear. The main slider and the auxiliary slider slide towards each other or away from each other under the cooperation of the control gear and the control rack.

[0017] By adopting the above technical solution, the main slider and the auxiliary slider slide towards or away from each other under the cooperation of the control gear and the control rack. The auxiliary slider slides along with the main slider. No additional drive source is required. This not only makes it easier to control the sliding of the abutment block, but also improves the stability of the sliding of the abutment block.

[0018] Preferably, a limiting block is slidably connected to the base, and a limiting groove is provided on the control block for the limiting block to be embedded after sliding. The base is provided with a limiting slide groove for the limiting block to slide. The limiting slide groove is connected to the main control groove. The end face of the main control block that contacts the limiting block is inclined. The size of the main control block decreases sequentially along the direction toward the main slider. So, during the process of the main control block sliding toward the main control groove, the limiting block can slide to be embedded in the limiting groove.

[0019] By adopting the above technical solution, during the sliding process of the sliding seat, the sliding of the control block is locked by the limit block. Therefore, during the adjustment of the tension of the control belt, the control block is not prone to sliding relative to the base, and the sliding length of the control block during operation is not easily changed due to the adjustment of the tension of the control belt, thus ensuring the normal use of the sliding device after the tension of the control belt is adjusted.

[0020] Preferably, the end of the limiting block facing the main control block is arranged in a dovetail shape, and the main control block is provided with a dovetail groove for the limiting block to slide.

[0021] By adopting the above technical solution, the limiting block and the dovetail groove cooperate to make it difficult for the limiting block to separate from the main control block when the main control block slides. There is no need to set up an additional device to reset the limiting block, which saves costs and ensures that the limiting block does not affect the normal use of the sliding device when it is in normal use.

[0022] Preferably, the end of the limiting block away from the main control block is provided with a guide arc surface.

[0023] By adopting the above technical solution, the guide arc surface provides guidance for the sliding of the limiting block toward the limiting groove, thereby improving the reliability of limiting the sliding of the control block by the limiting block.

[0024] Preferably, the control slider is provided with an operating hole in the shape of an oblong.

[0025] By adopting the above technical solution, the design of the operating hole makes it easier for operators to control the sliding of the control slider.

[0026] Preferably, the control block near the main roller is provided with friction-enhancing grooves arranged in an S-shape, and the friction-enhancing grooves are provided on the inner wall of the fitting cavity that is in contact with the control belt.

[0027] By adopting the above technical solution, and by setting the friction-enhancing groove, when the control belt is fitted into the fitting cavity under the action of the fixed block, part of the control belt will be segmented and embedded in the friction-enhancing groove under its own elasticity, thereby effectively increasing the friction between the control belt and the control block, and further making it less likely for the control belt to move relative to the control block during the sliding process of the sliding seat.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. Under the action of the control component, the sliding seat slides along the length of the base. When the sliding seat slides, it drives the auxiliary roller to move relative to the main roller, thereby adjusting the tension of the control belt and effectively improving the service life of the sliding device. Since the replacement frequency and maintenance cost of the control belt are low, the operating cost of the sliding device for object docking is effectively reduced.

[0030] 2. During normal use of the sliding device, when the control slider slides to fit against the end face of the control worm, external impurities are less likely to corrode the control worm, which to some extent extends the service life of the sliding device assembly, reduces the frequency of parts replacement, and thus reduces the operating cost of the sliding device.

[0031] 3. When it is necessary to adjust the tension of the control belt, the control slider moves toward the main control block until the main control block is completely housed in the main control slot. This allows the operator to rotate the control worm gear while releasing the restriction of the control belt by the abutment block, making it convenient to use. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0033] Figure 2 This is a schematic diagram of the cover plate removal structure according to an embodiment of this application.

[0034] Figure 3 This is a side sectional view of the base in an embodiment of this application.

[0035] Figure 4 This is a side view of the base in an embodiment of this application.

[0036] Figure 5 This is a schematic diagram of the control block structure near the main roller in an embodiment of this application.

[0037] Figure 6 This is a schematic diagram of the control block structure near the auxiliary roller in an embodiment of this application.

[0038] Figure 7 This is a schematic diagram of the bottom structure of the base in an embodiment of this application.

[0039] Figure 8 This is a schematic diagram of the cross-section of the base in an embodiment of this application.

[0040] Figure 9 yes Figure 8 A schematic diagram of the structure when the main control block is housed in the main control slot.

[0041] Explanation of reference numerals in the attached drawings: 1. Base; 11. Main roller; 111. Fixed seat; 12. Auxiliary roller; 121. Sliding seat; 13. Control belt; 14. Control block; 141. Sensor plate; 142. Fitting cavity; 143. Limiting groove; 15. Cover plate; 16. Rotating motor; 17. Photoelectric sensor; 18. Slide rail; 2. Control screw; 21. Control worm gear; 22. Control worm; 221. Hexagonal hole; 3. Fixed block; 31. Friction-enhancing groove; 4. 41. Abutting block; 41. Abutting post; 411. Abutting through hole; 412. Control spring; 413. Main sliding slope; 5. Main slider; 51. Auxiliary slider; 511. Auxiliary sliding groove; 52. Main sliding groove; 53. Control gear; 531. Control rack; 54. Main control spring; 6. Control slider; 61. Control sliding groove; 62. Operating hole; 7. Main control block; 71. Main control groove; 72. Main control slope; 8. Limit block; 81. Limit sliding groove; 82. Dovetail groove. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0043] This application discloses a synchronous and opposite sliding device, referring to... Figure 1 and Figure 2 The system includes a base 1, on which a main roller 11 and a secondary roller 12 are mounted. The main roller 11 and the secondary roller 12 are respectively located at both ends of the base 1 along its length. The base 1 is provided with a fixed seat 111 for supporting the main roller 11. The main roller 11 is rotatably mounted on the fixed seat 111. A sliding seat 121 for supporting the secondary roller 12 is slidably connected to the base 1. The secondary roller 12 is rotatably mounted on the sliding seat 121. A control belt 13 is slidably connected to the base 1. The main roller 11 and the secondary roller 12 are connected by the control belt 13. The base 1 is provided with two control blocks 14 respectively located on the upper and lower layers of the control belt 13. The control blocks 14 can cooperate with other supporting and clamping components to move the object to be docked.

[0044] Reference Figure 1 and Figure 2A cover plate 15 is fixedly mounted on the base 1 to provide protection for the control belt 13 and control blocks 14. The cover plate 15 is fixed to the base 1 by bolts. The base 1 is provided with a rotating component for driving the main roller 11 to rotate. In this embodiment, the rotating component is a rotary motor 16, which is fixed on the base 1. The output shaft of the rotary motor 16 is coaxially fixed with the main roller 11. When the main roller 11 rotates under the action of the rotary motor 16, the auxiliary roller 12 can rotate synchronously under the action of belt transmission, so that the two control blocks 14 can slide towards or away from each other under the action of the control belt 13. A photoelectric sensor 17 is provided on the base 1, and a sensing plate 141 adapted to the photoelectric sensor 17 is provided on the control block 14. The photoelectric sensor 17 and the sensing plate 141 cooperate to determine the sliding length of the control block 14, thereby improving the safety of the sliding device during use.

[0045] In practical applications, the sliding seat 121 slides along the length of the base 1. The bottom of the sliding seat 121 may be provided with a sliding block, and the base 1 is provided with a sliding groove for the sliding block to slide. The sliding block and the sliding groove cooperate to improve the reliability of the sliding seat 121 sliding on the base 1. When the sliding seat 121 slides, it drives the auxiliary roller 12 to move relative to the main roller 11, thereby adjusting the tension of the control belt 13, which effectively improves the service life of the sliding device. Since the replacement frequency and maintenance cost of the control belt 13 are low, the operating cost of the sliding device for object docking is effectively reduced.

[0046] Reference Figure 3 The base 1 is equipped with a control assembly for controlling the sliding seat 121. The control assembly includes a control screw 2 rotatably mounted on the base 1, which is positioned along the length of the base 1. A control threaded hole, threadedly engaged with the control screw 2, is provided through the sliding seat 121. A control worm gear 21 is coaxially fixed on the control screw 2. A control worm 22, meshing with the control worm gear 21, is rotatably connected to the base 1. When the control worm 22 rotates, the control worm gear 21 rotates under the action of gear transmission. The self-locking nature of the engagement between the control worm gear 21 and the control worm 22 effectively improves the reliability of the sliding seat 121 sliding via the rotation of the control worm 22. One end of the control worm 22 penetrates the side wall of the base 1, and the other end of the control worm 22 outside the base 1 has a hexagonal hole 221 adapted to a hexagonal wrench. This allows for adjustment of the tension of the control belt 13 without disassembling the cover plate 15, facilitating operation.

[0047] Reference Figure 2 and Figure 5The control block 14 is provided with a fitting cavity 142 for the control belt 13 to be inserted and fitted. Near the main roller 11, the control block 14 is provided with a fixing block 3 for fixing the control belt 13. In this embodiment, the fixing block 3 is fixed to the control block 14 by bolts, so that the control belt 13 is less likely to move relative to the control block 14 during the sliding of the sliding seat 121. Near the main roller 11, the control block 14 is provided with S-shaped friction-enhancing grooves 31. The friction-enhancing grooves 31 are located on the inner wall of the fitting cavity 142 where the control belt 13 fits. With the friction-enhancing grooves 31, when the control belt 13 is fitted into the fitting cavity 142 under the action of the fixing block 3, a portion of the control belt 13 will be segmented and fitted into the friction-enhancing grooves 31 under its own elasticity, thereby effectively increasing the friction between the control belt 13 and the control block 14, further making it less likely for the control belt 13 to move relative to the control block 14 during the sliding of the sliding seat 121.

[0048] Reference Figure 2 and Figure 6 A sliding contact block 4 for fixing the control belt 13 is slidably connected to the control block 14 near the auxiliary roller 12. The contact block 4 slides along the thickness direction of the base 1. When the contact block 4 slides away from the base 1 and separates from the control belt 13, the sliding seat 121 can adjust the tension of the control belt 13. The contact block 4 is provided with multiple contact pins 41. The control block 14 is provided with through holes 411 for the contact pins 41 to slide. In this embodiment, there are six contact pins 41, which are arranged in two groups symmetrically on both sides of the fitting cavity 142. The control block 14 is provided with a control elastic element for driving the abutment block 4 to slide toward the control block 14. In this embodiment, the control elastic element is a control spring 412. The control spring 412 is sleeved on the abutment post 41. One end of the control spring 412 is fixed to the inner wall of the abutment through hole 411, and the other end of the control spring 412 is fixed to the abutment post 41. By setting the control spring 412, the abutment block 4 can maintain a tight state with the control belt 13 without the action of other external forces, thereby improving the reliability of driving the control block 14 to slide by the control belt 13.

[0049] Reference Figure 7 and Figure 8The base 1 is equipped with a control component for pushing the abutment block 4 to slide away from the control belt 13. The control component includes a main slider 5 and an auxiliary slider 51 slidably disposed on the base 1. The base 1 is provided with a main slide groove 52 for the main slider 5 to slide and an auxiliary slide groove 511 for the auxiliary slider 51 to slide. A control gear 53 is rotatably connected to the base 1. The main slider 5 and the auxiliary slider 51 are symmetrically disposed on both sides of the control gear 53. Both the main slider 5 and the auxiliary slider 51 are provided with a control rack 531 that meshes with the control gear 53. The main slider 5 and the auxiliary slider 51 slide towards or away from each other under the cooperation of the control gear 53 and the control rack 531. The auxiliary slider 51 slides along with the main slider 5. No additional drive source is required, which facilitates the control of the sliding of the abutment block 4 and improves the stability of the sliding of the abutment block 4.

[0050] Reference Figure 7 and Figure 8 The end of the abutment post 41 located outside the control block 14 is provided with a main sliding inclined surface 413 that cooperates with the main slider 5 and the auxiliary slider 51. When the main slider 5 and the auxiliary slider 51 slide toward the abutment post 41, they can push the abutment block 4 to slide away from the control belt 13, thereby releasing the locking of the abutment block 4 to the control belt 13. The base 1 is provided with a main control elastic element for pushing the main slider 5 to slide toward the control slide groove 61. In this embodiment, the main control elastic element is a main control spring 54. One end of the main control spring 54 is fixed to the inner wall of the main slide groove 52, and the other end of the main control spring 54 is fixed to the main slider 5. In the absence of other external forces, the main slider 5 can be kept separated from the abutment post 41.

[0051] Reference Figure 4 and Figure 7 A control slider 6 is slidably connected to the base 1. The base 1 has a control groove 61 for the control slider 6 to slide. The end face of the control worm 22 is flush with the bottom wall of the control groove 61. The main slider 5 has a main control block 7 at the end away from the abutment post 41. The base 1 has a main control groove 71 for the main control block 7 to slide. The main control groove 71 is connected to the control groove 61 and the main groove 52. The main control block 7 has a main control inclined surface 72 on the side facing the control worm 22. The control slider 6 can slide along the control groove 61 to the main control block 7 and be stored in the main control groove 71, which facilitates the control of the sliding of the main slider 5.

[0052] In practical applications, during normal use of the sliding device, the control slider 6 slides to fit against the end face of the control worm 22, making it less likely for external impurities to corrode the hexagonal hole 221. This extends the service life of the sliding device assembly to a certain extent, reduces the frequency of parts replacement, and thus reduces the operating cost of the sliding device. When it is necessary to adjust the tension of the control belt 13, the control slider 6 slides towards the main control block 7. The control slider 6 first slides to fit against the main control inclined surface 72 on the main control block 7, and then, as the control slider 6 slides, the main control block 7 slides into the main control groove 71 until it is completely housed in the main control groove 71. When the main control block 7 slides, it drives the main slider 5 and the auxiliary slider 51 to slide until the abutment block 4 separates from the control belt 13. The sliding of the control slider 6 can, on the one hand, release the restriction on the control worm 22, and on the other hand, separate the abutment block 4 from the control belt 13. When the control worm 22 is rotated by the hex wrench to drive the sliding seat 121 to slide, the tension of the control belt 13 can be adjusted smoothly and synchronously.

[0053] Reference Figure 7 , Figure 8 and Figure 9 The base 1 is also slidably connected to a limiting block 8. The base 1 is provided with two slide rails 18, which are symmetrically arranged at both ends of the main roller 11. The control block 14 is provided with two sliders on one side that cooperate with the slide rails 18. A limiting groove 143 is left between the two sliders for the limiting block 8 to be inserted after sliding. The base 1 is provided with a limiting groove 81 for the limiting block 8 to slide. The limiting groove 81 is connected to the main control groove 71. The end face of the main control block 7 that contacts the limiting block 8 is inclined. The size of the main control block 7 decreases sequentially along the direction toward the main slider 5. During the process of the main control block 7 sliding toward the main control groove 71, the limiting block 8 can slide into the limiting groove 143, thereby locking the sliding of the control block 14.

[0054] During the sliding process of the sliding seat 121, the sliding of the control block 14 is locked by the limit block 8. Therefore, during the adjustment of the tension of the control belt 13, the control block 14 is not likely to slide relative to the base 1, and the sliding length of the control block 14 during operation is not easily changed due to the adjustment of the tension of the control belt 13, thus ensuring the normal use of the sliding device after the tension of the control belt 13 is adjusted.

[0055] During the adjustment of the tension of the control belt 13, the control block 14 on the other side can be manually limited, or a set of limit components consisting of a control slider 6, a main control block 7 and a limit block 8 can be set to make the control block 14 on the other side less likely to shift during the adjustment of the tension of the control belt 13. After the adjustment is completed, the position of the control block 14 can be determined by the photoelectric sensor 17.

[0056] Reference Figure 8 and Figure 9The limiting block 8 is dovetail-shaped at the end facing the main control block 7. The main control block 7 has a dovetail groove 82 for sliding the dovetail block. The limiting block 8 cooperates with the dovetail groove 82, making it difficult for the limiting block 8 to separate from the main control block 7 when it slides. This eliminates the need for an additional device to reset the limiting block 8, saving costs and ensuring that the limiting block 8 does not affect the normal operation of the sliding device. The end of the limiting block 8 away from the main control block 7 has a guide arc surface, which guides the sliding of the limiting block 8 toward the limiting groove 143, improving the reliability of limiting the sliding of the control block 14 by the limiting block 8.

[0057] Reference Figure 4 The control slider 6 is provided with an operating hole 62 in the shape of a waist. The operation hole 62 makes it easier for the operator to control the sliding of the control slider 6. In fact, the base 1 can be provided with a protective plate to cover the main control groove 71. Then, during the operation of the sliding device, external factors are not easy to control the main control block 7 to slide into the main control groove 71, thus ensuring the safety of the sliding device during operation.

[0058] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A synchronous opposite-direction sliding device, characterized in that, The system includes a base (1), on which a main roller (11) and a secondary roller (12) are mounted. The main roller (11) and the secondary roller (12) are respectively located at both ends of the base (1) along its length. The base (1) is provided with a fixed seat (111) for supporting the main roller (11), and a sliding seat (121) for supporting the secondary roller (12) is slidably connected to the base (1). The main roller (11) is rotatably mounted on the fixed seat (111), and the secondary roller (12) rotates... The sliding seat (121) is slidably mounted on the base (1). A control belt (13) is slidably connected to the base (1). The main roller (11) and the auxiliary roller (12) are connected by the control belt (13). The base (1) is provided with a rotating component for driving the main roller (11) to rotate. When the main roller (11) rotates, the two control blocks (14) can slide towards each other or away from each other under the action of the control belt (13). The base (1) is provided with a control component for controlling the sliding seat (121) to slide. The control assembly includes a control screw (2) rotatably mounted on a base (1), a control threaded hole for threaded engagement with the control screw (2) through a sliding seat (121), a control worm gear (21) coaxially fixed on the control screw (2), and a control worm (22) rotatably connected to the base (1) and meshing with the control worm gear (21), with one end of the control worm (22) penetrating the base (1). The control block (14) is provided with a fitting cavity (142) for fitting the control belt (13). The control block (14) near the main roller (11) is provided with a fixing block (3) for fixing the control belt (13). The control block (14) near the auxiliary roller (12) is slidably connected with an abutment block (4) for fixing the control belt (13). The abutting block (4) is provided with multiple abutting posts (41), the control block (14) is provided with abutting through holes (411) for the abutting posts (41) to slide, the control block (14) is provided with a control elastic element for driving the abutting block (4) to slide toward the control block (14), and the base (1) is provided with a control element for pushing the abutting block (4) to slide away from the control belt (13); The control component includes a main slider (5) slidably disposed on a base (1). The base (1) has a main slide groove (52) for the main slider (5) to slide. The end of the abutment post (41) located outside the control block (14) has a main sliding inclined surface (413) that cooperates with the main slider (5). When the main slider (5) slides toward the abutment post (41), it can push the abutment block (4) to slide away from the control belt (13). The two control blocks (14) are respectively provided with a limiting component consisting of a control slider (6), a main control block (7) and a limiting block (8). The limiting component is used to limit the displacement of the control block (14) during the tension adjustment process of the control belt (13). The control slider (6) is slidably mounted on the base (1). The base (1) has a control groove (61) for the control slider (6) to slide. The end face of the control worm (22) is flush with the bottom wall of the control groove (61). The base (1) has a main control groove (71) for the main control block (7) to slide. The main control groove (71) is connected to the control groove (61). The main control groove (71) near the auxiliary roller (12) is also connected to the main groove (52). The main control block (7) has a main control inclined surface (72). The control slider (6) can slide along the control groove (61) to the main control block (7) and be stored in the main control groove (71). The base (1) has a main control elastic element for pushing the main slider (5) to slide toward the control groove (61).

2. The synchronous opposite sliding device according to claim 1, characterized in that, The control component also includes an auxiliary slider (51) slidably disposed on the base (1). The base (1) has an auxiliary sliding groove (511) for the auxiliary slider (51) to slide. A control gear (53) is rotatably connected to the base (1). The main slider (5) and the auxiliary slider (51) are symmetrically disposed on both sides of the control gear (53). Both the main slider (5) and the auxiliary slider (51) are provided with a control rack (531) that meshes with the control gear (53). The main slider (5) and the auxiliary slider (51) slide towards each other or away from each other under the cooperation of the control gear (53) and the control rack (531).

3. The synchronous opposite sliding device according to claim 1, characterized in that, The control block (14) is provided with a limiting groove (143) for the limiting block (8) to slide and embed. The base (1) is provided with a limiting slide groove (81) for the limiting block (8) to slide. The limiting slide groove (81) is connected to the main control groove (71). The end face of the main control block (7) that contacts the limiting block (8) is inclined. The size of the main control block (7) decreases sequentially along the direction toward the main slider (5). During the process of the main control block (7) sliding toward the main control groove (71), the limiting block (8) can slide to be embedded in the limiting groove (143).

4. The synchronous opposite sliding device according to claim 3, characterized in that, The limiting block (8) is arranged in a dovetail shape at one end facing the main control block (7), and the main control block (7) is provided with a dovetail groove (82) for the limiting block (8) to slide.

5. The synchronous opposite-direction sliding device according to claim 4, characterized in that, The limiting block (8) has a guide arc surface at the end away from the main control block (7).

6. The synchronous opposite sliding device according to claim 1, characterized in that, The control slider (6) is provided with an operating hole (62) in the shape of a waist.

7. The synchronous opposite sliding device according to claim 1, characterized in that, The control block (14) near the main roller (11) is provided with friction-enhancing grooves (31) arranged in an S-shape. The friction-enhancing grooves (31) are located on the inner wall of the fitting cavity (142) and the control belt (13).

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