Synchronous different-direction sliding device

Abstract

The invention relates to a synchronous different-direction sliding device, and belongs to the technical field of sliding devices, the synchronous different-direction sliding device comprises a base, the base is provided with a main roller and an auxiliary roller, the main roller and the auxiliary roller are arranged at the two ends of the base in the length direction respectively, the base is provided with a fixing base used for supporting the main roller, and the base is slidably connected with a sliding base used for supporting the auxiliary roller; the main roller is rotationally arranged on the fixing base, the auxiliary roller is rotationally arranged on the sliding base, a control belt is slidably connected to the base, the main roller and the auxiliary roller are connected through the control belt, a rotating piece used for driving the main roller to rotate is arranged on the base, and when the main roller rotates, the two control blocks can slide in the face-to-face or back-to-back mode under the action of the control belt. A control assembly used for controlling the sliding seat to slide is arranged on the base. The sliding device has the effect of reducing the use cost of the sliding device for object butt joint.

Description

Technical Field

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

[0002] Transmission devices are usually used in various precision machining machines, such as CNC machining centers, 3D printers, etc. Their main function is to transfer and carry objects. According to the object movement requirements, transmission devices can be divided into transfer or docking. The former only requires one moving part, while the latter requires two synchronous and opposite-direction moving parts to achieve.

[0003] Existing transmission devices basically adopt screw drive. If it is a docking requirement, a set of left-handed and right-handed screws is used to meet the requirement. However, it is found in actual use that the docking position of the left-handed and right-handed screws generally uses a flange or other connecting parts for docking, resulting in some spacing between the two left-handed and right-handed screws. When the device is applied to the docking of some objects, this spacing will cause the docking to fail, and the cost of screw drive and subsequent maintenance costs are relatively high. Summary of the Invention

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

[0005] The synchronous and opposite-direction sliding device provided by this application adopts the following technical solutions: A synchronous and opposite-direction sliding device includes a base. A main roller and a secondary roller are provided on the base. The main roller and the secondary roller are respectively arranged at both ends of the length direction of the base. A fixed seat for supporting the main roller is provided on the base. A sliding seat for supporting the secondary roller is slidably connected to the base. The main roller is rotatably arranged on the fixed seat. The secondary roller is rotatably arranged on the sliding seat. A control belt is slidably connected to the base. The main roller and the secondary roller are connected by the control belt. A rotating member for driving the main roller to rotate is provided 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 component for controlling the sliding of the sliding seat is provided on the base.

[0006] By adopting the above technical solutions, the sliding seat slides along the length direction of the base under the action of the control component. When the sliding seat slides, it drives the secondary roller to move relative to the main roller, thereby enabling the adjustment of the tightness of the control belt, effectively improving the service life of the sliding device. Since the replacement frequency and maintenance cost of the control belt are relatively low, the usage cost of the sliding device for object docking is effectively reduced.

[0007] Preferably, the control component includes a control screw rotatably arranged on the base, a control threaded hole is penetrated on the sliding seat and cooperates with the control screw thread, a control turbine is coaxially fixed on the control screw, a control vortex rod is rotatably connected to the base and meshes with the control turbine, and one end of the control vortex rod passes through the base.

[0008] By adopting the above technical solution, when the control vortex rod rotates, the control turbine rotates under the action of the threaded transmission, and when the control turbine rotates, it drives the control screw to rotate, so that the sliding seat can slide along the length direction of the base under the action of the threaded transmission. Since the cooperation between the control turbine and the control vortex rod is self-locking, the reliability of driving the sliding seat to slide through the rotation of the control vortex rod is effectively improved.

[0009] Preferably, the control block is provided with an engagement cavity for the control belt to engage, the control block close to the main roller is provided with a fixing block for fixing the control belt, and the control block close to the auxiliary roller is slidably connected with an abutment block for fixing the control belt; The abutment block is provided with a plurality of abutment columns, the control block is penetrated with abutment through holes for the abutment columns to slide, the control block is provided with a control elastic member for driving the abutment block to slide toward the control block, and the base is provided with a control member for pushing the abutment block to slide in a direction away from the control belt.

[0010] By adopting the above technical solution, the setting of the fixed block makes it difficult for the control block close to the main roller to be separated from the control belt. The sliding setting of the abutment block makes it possible to release the lock of the control belt during the sliding process of the sliding seat, thereby facilitating the adjustment of the tightness of the control belt. By controlling the setting of the elastic member, the abutment block can maintain a tight state with the control belt in the absence of other external forces, thereby improving the reliability of the control block sliding driven by the control belt.

[0011] Preferably, the control member comprises a main slider slidably arranged on the base, the base is provided with a main slide groove for the main slider to slide, one end of the abutment column located outside the control block is provided with a main slide inclined surface cooperating with the main slider, and when the main slider slides toward the abutment column, it can push the abutment block to slide in a direction away from the control belt; A control sliding block is slidably connected to the base, a control sliding groove for sliding the control sliding block is provided on the base, the end face of the control vortex is flush with the bottom wall of the control sliding groove, a main control block is provided at the end of the main sliding block facing away from the abutment column, a main control groove for sliding the main control block is provided on the base, the main control groove is connected with both the control sliding groove and the main sliding groove, a main control inclined surface is provided on the side of the main control block facing the control vortex, the control sliding block can slide along the control sliding groove until the main control block is stored in the main control groove, and a main control elastic member is provided on the base for pushing the main sliding block to slide toward the control sliding groove.

[0012] By adopting the above technical solution, during the normal use of the sliding device, when the control slider slides to fit with the end face of the control worm, foreign matters from the outside are not likely to erode the control worm, which to a certain extent prolongs the service life of the sliding device assembly, reduces the frequency of part replacement, and thus reduces the use cost of the sliding device; when it is necessary to adjust the tightness of the control belt, the control slider slides towards the main control block until the main control block is completely received in the main control groove, so that while releasing the restriction of the abutting block on the control belt, the operator can rotate the control worm, which is convenient for use.

[0013] Preferably, the control member further includes an auxiliary slider slidably disposed on the base. An auxiliary sliding groove for the auxiliary slider to slide is formed on the base. 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. Control racks meshing with the control gear are provided on both the main slider and the auxiliary slider. The main slider and the auxiliary slider slide towards or away from each other under the cooperation of the control gear and the control racks.

[0014] 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 racks. The auxiliary slider slides following the sliding of the main slider without an additional driving source, which facilitates the sliding of the abutting block and improves the stability of the sliding of the abutting block.

[0015] Preferably, a limiting block is further slidably connected to the base. A limiting groove for the limiting block to slide and be inserted into is correspondingly provided on the control block. A limiting sliding groove for the limiting block to slide is provided on the base. The limiting sliding groove communicates with the main control groove. The end face of the main control block in contact with the limiting block is inclined. The size of the main control block gradually decreases along the direction towards the main slider. Then, during the process of the main control block sliding into the main control groove, the limiting block can slide to be inserted into the limiting groove.

[0016] By adopting the above technical solution, during the sliding of the sliding seat, the sliding of the control block is locked by the limiting block. Then, during the process of adjusting the tightness of the control belt, the control block is not likely to slide relative to the base, and it is not likely to change the sliding length of the control block during operation due to adjusting the tightness of the control belt, ensuring the normal use of the sliding device after adjusting the tightness of the control belt.

[0017] Preferably, one end of the limiting block facing the main control block is in a dovetail shape, and a dovetail groove for the limiting block to slide is provided on the main control block.

[0018] By adopting the above technical solution, the limiting block cooperates with the dovetail groove, so that when the main control block slides, the limiting block is not easily separated from the main control block, and there is no need to additionally set a device for resetting the limiting block, which saves costs and ensures that when the sliding device is in normal use, the limiting block is not likely to affect the normal use of the sliding device.

[0019] Preferably, a guiding arc surface is provided at one end of the limiting block away from the main control block.

[0020] By adopting the above technical solution, the guiding arc surface provides guidance for the sliding of the limiting block towards the limiting groove, improving the reliability of restricting the sliding of the control block by the limiting block.

[0021] Preferably, an operation hole in a waist shape is provided on the control slider.

[0022] By adopting the above technical solution, the setting of the operation hole makes it more convenient for the operator to control the sliding of the control slider.

[0023] Preferably, on the control block close to the main roller, anti-friction grooves arranged in an S shape are provided on the inner wall of the fitting cavity where the control belt is in contact.

[0024] By adopting the above technical solution, through the setting of the anti-friction grooves, when the control belt is fitted into the fitting cavity under the action of the fixed block, part of the control belt will be segmentally fitted into the anti-friction grooves under the action of its own elasticity, thereby effectively increasing the friction between the control belt and the control block, and further making it difficult for the control belt to move relative to the control block during the sliding of the sliding seat.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The sliding seat slides along the length direction 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 being able to adjust the tightness of the control belt, effectively improving the service life of the sliding device. Since the replacement frequency and maintenance cost of the control belt are relatively low, the use cost of the sliding device for object docking is effectively reduced; 2. During the normal use of the sliding device, when the control slider slides to fit with the end face of the control worm, foreign matters and the like from the outside are not easily eroded into the control worm, which to a certain extent prolongs the service life of the sliding device assembly, reduces the frequency of part replacement, and thus reduces the use cost of the sliding device; 3. When it is necessary to adjust the tightness of the control belt, the control slider slides towards the main control block until the main control block is completely received in the main control groove, so that while releasing the restriction of the abutting block on the control belt, the operator can rotate the control worm, which is convenient for use. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the structure without the cover plate of an embodiment of the present application.

[0028] Figure 3 It is a side cross-sectional view of the base in an embodiment of the present application.

[0029] Figure 4 It is a side view of the base in an embodiment of the present application.

[0030] Figure 5 It is a schematic diagram of the control block structure near the main roller in an embodiment of the present application.

[0031] Figure 6 It is a schematic diagram of the control block structure near the auxiliary roller in an embodiment of the present application.

[0032] Figure 7 It is a schematic diagram of the bottom structure of the base in an embodiment of the present application.

[0033] Figure 8 It is a schematic cross-sectional view of the base in an embodiment of the present application.

[0034] Figure 9 It is Figure 8 a schematic diagram of the structure when the main control block is received in the main control groove.

[0035] Explanation of reference numerals: 1, base; 11, main roller; 111, fixed seat; 12, auxiliary roller; 121, sliding seat; 13, control belt; 14, control block; 141, sensing piece; 142, fitting cavity; 143, limiting groove; 15, cover plate; 16, rotating motor; 17, photoelectric sensor; 18, slide rail; 2, control screw; 21, control turbine; 22, control worm; 221, hexagonal hole; 3, fixed block; 31, anti-slip groove; 4, abutting block; 41, abutting column; 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, operation hole; 7, main control block; 71, main control groove; 72, main control slope; 8, limiting block; 81, limiting sliding groove; 82, dovetail groove. Detailed implementation manners

[0036] The following further Figures 1-9 elaborates on the present application in detail in conjunction with the attached

[0037] An embodiment of the present application discloses a synchronous and opposite-direction sliding device. Referring to Figure 1 and Figure 2, including a base 1, on which a main roller 11 and a sub-roller 12 are provided. The main roller 11 and the sub-roller 12 are respectively arranged at two ends of the base 1 in the length direction. A fixed seat 111 for supporting the main roller 11 is provided on the base 1. The main roller 11 is rotatably arranged on the fixed seat 111. A sliding seat 121 for supporting the sub-roller 12 is slidably connected to the base 1. The sub-roller 12 is rotatably arranged on the sliding seat 121. A control belt 13 is slidably connected to the base 1. The main roller 11 and the sub-roller 12 are connected by the control belt 13. Two control blocks 14 are provided on the base 1, which are respectively arranged on the upper and lower layers of the control belt 13. The control blocks 14 can cooperate with other supporting and clamping members to drive the object to be docked to move.

[0038] Refer to Figure 1 and Figure 2 , a cover plate 15 for protecting the control belt 13 and the control blocks 14 is fixedly arranged on the base 1. The cover plate 15 is fixed to the base 1 by bolts. A rotating member for driving the main roller 11 to rotate is provided on the base 1. In the embodiment of the present application, the rotating member is selected as a rotating motor 16. The rotating motor 16 is fixedly arranged on the base 1. The output shaft of the rotating motor 16 is coaxially fixed to the main roller 11. When the main roller 11 rotates under the action of the rotating motor 16, the sub-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 piece 141 adapted to the photoelectric sensor 17 is provided on the control block 14. The cooperation between the photoelectric sensor 17 and the sensing piece 141 can judge the sliding length of the control block 14, improving the safety during the use of the sliding device.

[0039] In the actual application process, the sliding seat 121 slides along the length direction of the base 1. A sliding block may be provided at the bottom of the sliding seat 121, and a sliding groove for the sliding block to slide is provided on the base 1. The cooperation between the sliding block and the sliding groove improves the reliability of the sliding seat 121 sliding on the base 1. When the sliding seat 121 slides, it drives the sub-roller 12 to move relative to the main roller 11, so as to adjust the tightness of the control belt 13, effectively improving the service life of the sliding device. Since the replacement frequency and maintenance cost of the control belt 13 are relatively low, the use cost of the sliding device for object docking is effectively reduced.

[0040] Refer to Figure 3, a control component for controlling the sliding of the sliding seat 121 is provided on the base 1. The control seat includes a control screw rod 2 rotatably arranged on the base 1. The control screw rod 2 is arranged along the length direction of the base 1. A control threaded hole in threaded fit with the control screw rod 2 is formed through the sliding seat 121. A control turbine 21 is coaxially fixed on the control screw rod 2. A control worm 22 meshing with the control turbine 21 is rotatably connected to the base 1. When the control worm 22 rotates, the control turbine 21 can rotate under the action of gear transmission. Due to the self-locking property of the cooperation between the control turbine 21 and the control worm 22, the reliability of driving the sliding seat 121 to slide by rotating the control worm 22 is effectively improved. One end of the control worm 22 penetrates through the side wall of the base 1, and a hexagonal hole 221 adapted to a hexagonal wrench is provided at the end of the control worm 22 outside the base 1, so that the tension of the control belt 13 can be adjusted without disassembling the cover plate 15, which is convenient for operation.

[0041] Referring to Figure 2 and Figure 5 , a fitting cavity 142 for the control belt 13 to penetrate and fit is provided on the control block 14. A fixing block 3 for fixing the control belt 13 is provided on the control block 14 close to the main roller 11. In the embodiment of the present application, the fixing block 3 is fixed to the control block 14 by bolts, so that during the sliding of the sliding seat 121, the control belt 13 is not likely to move relative to the control block 14. A friction increasing groove 31 arranged in an S shape is provided on the control block 14 close to the main roller 11. The friction increasing groove 31 is arranged on the inner wall of the fitting cavity 142 in contact with the control belt 13. Through the arrangement of the friction increasing groove 31, when the control belt 13 is fitted into the fitting cavity 142 under the action of the fixing block 3, part of the control belt 13 will be segmentally fitted into the friction increasing groove 31 under the action of its own elasticity, thereby effectively increasing the friction between the control belt 13 and the control block 14, and further making the control belt 13 not likely to move relative to the control block 14 during the sliding of the sliding seat 121.

[0042] Referring to Figure 2 and Figure 6, a 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 tightness of the control belt 13 can be adjusted when the sliding seat 121 slides. A plurality of contact posts 41 are provided on the contact block 4, and a contact through hole 411 for the contact posts 41 to slide through is formed through the control block 14. In the embodiment of the present application, there are six contact posts 41, and the six contact posts 41 are divided into two groups and symmetrically arranged on both sides of the fitting cavity 142. A control elastic member for driving the contact block 4 to slide towards the control block 14 is provided on the control block 14. In the embodiment of the present application, the control elastic member is a control spring 412. The control spring 412 is sleeved on the contact post 41. One end of the control spring 412 is fixed to the inner wall of the contact through hole 411, and the other end of the control spring 412 is fixed to the contact post 41. Through the arrangement of the control spring 412, the contact block 4 can maintain the state of being in contact with the control belt 13 tightly without other external forces, improving the reliability of driving the control block 14 to slide by the control belt 13.

[0043] Refer to Figure 7 and Figure 8 , a control member for pushing the contact block 4 to slide away from the control belt 13 is provided on the base 1. The control member includes a main slider 5 and an auxiliary slider 51 slidably arranged on the base 1. A main sliding groove 52 for the main slider 5 to slide through and an auxiliary sliding groove 511 for the auxiliary slider 51 to slide through are formed on the base 1. A control gear 53 is rotatably connected to the base 1. The main slider 5 and the auxiliary slider 51 are symmetrically arranged on both sides of the control gear 53. Control racks 531 meshing with the control gear 53 are provided on both the main slider 5 and the auxiliary slider 51. 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 racks 531. The auxiliary slider 51 slides following the sliding of the main slider 5, without an additional driving source, improving the stability of the sliding of the contact block 4 while facilitating the control of the sliding of the contact block 4.

[0044] Refer to Figure 7 and Figure 8 , a main sliding inclined surface 413 for cooperating with the main slider 5 and the auxiliary slider 51 is provided at one end of the contact post 41 outside the control block 14. Then when the main slider 5 and the auxiliary slider 51 slide towards the contact post 41, the contact block 4 can be pushed to slide away from the control belt 13, thereby releasing the locking of the contact block 4 on the control belt 13. A main control elastic member for pushing the main slider 5 towards the control sliding groove 61 is provided on the base 1. In the embodiment of the present application, the main control elastic member is a main control spring 54. One end of the main control spring 54 is fixed to the inner wall of the main sliding groove 52, and the other end of the main control spring 54 is fixed to the main slider 5. Then in the absence of other external forces, the state of separation between the main slider 5 and the contact post 41 can be maintained.

[0045] Reference Figure 4 and Figure 7 A control slider 6 is slidably connected to the base 1, and a control slide groove 61 for sliding the control slider 6 is opened on the base 1. The end surface of the control worm 22 is flush with the bottom wall of the control slide groove 61. A main control block 7 is provided at the end of the main slider 5 away from the abutment column 41. A main control groove 71 for sliding the main control block 7 is provided on the base 1. The main control groove 71 is connected with the control slide groove 61 and the main slide groove 52. A main control inclined surface 72 is provided on the side of the main control block 7 facing the control worm 22. The control slider 6 can slide along the control slide groove 61 to the main control block 7 and be received in the main control groove 71, so as to control the sliding of the main slider 5.

[0046] In actual application, during the normal use of the sliding device, the control slider 6 is made to slide to fit with the end face of the control worm 22, so that external impurities are not easy to corrode the hexagonal hole 221, which prolongs the service life of the sliding device assembly to a certain extent, reduces the frequency of parts replacement, and thus reduces the use cost of the sliding device; when it is necessary to adjust the tightness of the control belt 13, the control slider 6 is controlled to slide toward the main control block 7, and the control slider 6 first slides to fit with 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 toward the main control groove 71 until it is completely received in the main control groove 71, and when the main control block 7 slides, it drives the main slider 5 and the auxiliary slider 51 to slide to the abutment block 4 and separate from the control belt 13. The sliding of the control slider 6 can release the restriction on the control worm 22 on the one hand, and can separate the abutment block 4 from the control belt 13 on the other hand. When the control worm 22 is rotated by a hexagonal wrench to drive the sliding seat 121 to slide, the tightness of the control belt 13 can be adjusted synchronously and smoothly.

[0047] Reference Figure 7 , Figure 8 and Figure 9 The base 1 is also slidably connected to a limit block 8, and two slide rails 18 are provided on the base 1. The two slide rails 18 are symmetrically arranged at both ends of the main roller 11. Two sliders cooperating with the slide rails 18 are provided on one side of the control block 14, and a limit groove 143 is reserved between the two sliders for the limit block 8 to slide and embed therein. A limit groove 81 is provided on the base 1 for the limit block 8 to slide, and the limit groove 81 is connected to the main control groove 71. The end surface of the main control block 7 in contact with the limit block 8 is inclined, and the size of the main control block 7 decreases successively along the direction toward the main slider 5. In the process of the main control block 7 sliding toward the main control groove 71, the limit block 8 can slide to be embedded in the limit groove 143, thereby locking the sliding of the control block 14.

[0048] During the sliding process of the sliding seat 121, the sliding of the control block 14 is locked by the limit block 8. Then, during the process of adjusting the tightness of the control belt 13, the control block 14 is not likely to slide relative to the base 1, and it is not easy to change the sliding length of the control block 14 during operation due to adjusting the tightness of the control belt 13, ensuring the normal use of the sliding device after adjusting the tightness of the control belt 13; during the process of adjusting the tightness of the control belt 13 for the control block 14 on the other side, it 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 correspondingly set, so that the main control block 7 on the other side is also not likely to move during the process of adjusting the tightness of the control belt 13. After the adjustment is completed, the position of the control block 14 can be judged by the photoelectric sensor 17.

[0049] Referring to Figure 8 and Figure 9 , one end of the limit block 8 facing the main control block 7 is arranged in a dovetail shape. The main control block 7 is provided with a dovetail groove 82 for the dovetail block to slide. The limit block 8 cooperates with the dovetail groove 82, so that the limit block 8 is not likely to separate from the main control block 7 when the main control block 7 slides. There is no need to additionally set a device for resetting the limit block 8, which saves costs and ensures that the limit block 8 is not likely to affect the normal use of the sliding device during the normal use of the sliding device. One end of the limit block 8 away from the main control block 7 is provided with a guiding arc surface, and the guiding arc surface provides guidance for the sliding of the limit block 8 towards the limit groove 143, improving the reliability of restricting the sliding of the control block 14 by the limit block 8.

[0050] Referring to Figure 4 , the control slider 6 is provided with an operation hole 62 arranged in a waist shape. The arrangement of the operation hole 62 makes it more convenient for the operator to control the sliding of the control slider 6. In fact, the base 1 can be provided with a protection plate for covering the main control groove 71. Then, during the operation of the sliding device, external factors are not likely to control the main control block 7 to slide into the main control groove 71, ensuring the safety during the operation of the sliding device.

[0051] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A synchronous and reverse sliding device, characterized in that, It includes a base (1). A main roller (11) and a sub-roller (12) are arranged on the base (1). The main roller (11) and the sub-roller (12) are respectively arranged at two ends in the length direction of the base (1). A fixing seat (111) for supporting the main roller (11) is arranged on the base (1). A sliding seat (121) for supporting the sub-roller (12) is slidably connected to the base (1). The main roller (11) is rotatably arranged on the fixing seat (111), and the sub-roller (12) is rotatably arranged on the sliding seat (121). A control belt (13) is slidably connected to the base (1). The main roller (11) and the sub-roller (12) are connected by the control belt (13). A rotating member for driving the main roller (11) to rotate is arranged on the base (1). When the main roller (11) rotates, two control blocks (14) can slide towards or away from each other under the action of the control belt (13). A control assembly for controlling the sliding of the sliding seat (121) is arranged on the base (1). The control assembly includes a control screw rod (2) rotatably arranged on the base (1). A control threaded hole in threaded fit with the control screw rod (2) is penetrated through the sliding seat (121). A control turbine (21) is coaxially fixed on the control screw rod (2). A control worm (22) meshing with the control turbine (21) is rotatably connected to the base (1). One end of the control worm (22) penetrates through the base (1). An engaging cavity (142) for the control belt (13) to be engaged is arranged on the control block (14). A fixing block (3) for fixing the control belt (13) is arranged on the control block (14) close to the main roller (11). An abutting block (4) for fixing the control belt (13) is slidably connected to the control block (14) close to the sub-roller (12). A plurality of abutting columns (41) are arranged on the abutting block (4). An abutting through hole (411) for the abutting columns (41) to slide is penetrated through the control block (14). A control elastic member for driving the abutting block (4) to slide towards the control block (14) is arranged on the control block (14). A control member for pushing the abutting block (4) to slide in a direction away from the control belt (13) is arranged on the base (1).

2. The synchronous and opposite-direction sliding device according to claim 1, wherein The control member includes a main slider (5) slidably arranged on the base (1). A main sliding groove (52) for the main slider (5) to slide is arranged on the base (1). A main sliding inclined surface (413) cooperating with the main slider (5) is arranged at one end of the abutting column (41) outside the control block (14). When the main slider (5) slides towards the abutting column (41), it can push the abutting block (4) to slide in a direction away from the control belt (13). The base (1) is slidably connected with a control slider (6), the base (1) is provided with a control slide groove (61) for sliding the control slider (6), the end surface of the control worm (22) is flush with the bottom wall of the control slide groove (61), the end of the main slider (5) away from the abutment column (41) is provided with a main control block (7), the base (1) is provided with a main control groove (71) for sliding the main control block (7), the main control groove (71) is connected with the control slide groove (61) and the main slide groove (52), the main control block (7) is provided with a main control inclined surface (72) on the side facing the control worm (22), the control slider (6) can slide along the control slide groove (61) to the main control block (7) and be received in the main control groove (71), and the base (1) is provided with a main control elastic member for pushing the main slider (5) to slide toward the control slide groove (61).

3. The synchronous and opposite-direction sliding device according to claim 2, characterized in that The control member further comprises an auxiliary slider (51) slidably arranged on the base (1); an auxiliary slide groove (511) for sliding the auxiliary slider (51) is provided on the base (1); a control gear (53) is rotatably connected to the base (1); the main slider (5) and the auxiliary slider (51) are symmetrically arranged on both sides of the control gear (53); the main slider (5) and the auxiliary slider (51) are both provided with a control rack (531) meshing 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).

4. The synchronous and opposite-direction sliding device according to claim 2, wherein, The base (1) is also slidably connected to a limit block (8); the control block (14) is correspondingly provided with a limit groove (143) for the limit block (8) to slide and embed; the base (1) is provided with a limit groove (81) for the limit block (8) to slide; the limit groove (81) is connected to the main control groove (71); the end surface of the main control block (7) in contact with the limit block (8) is inclined; the size of the main control block (7) decreases in sequence along the direction toward the main slider (5); when the main control block (7) slides toward the main control groove (71), the limit block (8) can slide to be embedded in the limit groove (143).

5. The synchronous and opposite-direction sliding device according to claim 4, wherein, One end of the limit block (8) facing the main control block (7) is arranged in a dovetail shape, and the main control block (7) is provided with a dovetail groove (82) for the limit block (8) to slide.

6. The synchronous and opposite-direction sliding device according to claim 5, wherein The limiting block (8) is provided with a guiding arc surface at one end away from the main control block (7).

7. The synchronous and opposite-direction sliding device according to claim 2, wherein The control slide block (6) is provided with an operating hole (62) arranged in a waist shape.

8. The synchronous and opposite-direction sliding device according to claim 1, characterized in that The control block (14) close to the main roller (11) is provided with an S-shaped arranged friction-increasing groove (31), and the friction-increasing groove (31) is arranged on the inner wall of the fitting cavity (142) and the control belt (13) in contact with each other.

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