Self-positioning sliding workbench

Abstract

The invention relates to the technical field of laser cutting, and discloses a self-positioning sliding workbench which comprises a bottom frame, a sliding frame arranged on the bottom frame in a front-back sliding mode, a working platform arranged on the sliding frame and a traction mechanism used for pulling the sliding frame to move front and back. According to the self-positioning sliding workbench, a direct current motor is innovatively selected to be combined with a speed reducer and a chain wheel and chain transmission structure. The direct current motor is relatively low in price, the speed reducer optimizes power transmission without greatly increasing cost, and the chain wheel and chain transmission system is simple in structure and low in manufacturing and maintenance cost. According to the combination, on the premise that positioning precision equivalent to or even better than that of a servo motor is achieved, the equipment purchase cost of an enterprise is greatly reduced, in the subsequent long-term operation process, due to low-cost maintenance and replacement of parts, the operation cost is effectively reduced, a large amount of capital investment is saved for the enterprise, and the market competitiveness is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting, in particular to a self-positioning sliding workbench. Background Art

[0002] In the hardware accessories and automotive parts industries, as the demand for batch cutting continues to increase, the application of laser cutting equipment has become more and more extensive. During the laser cutting operation, the performance of the workbench plays a vital role in cutting efficiency and quality.

[0003] When traditional workbenches place workpieces and send them to the cutting area, it is often difficult to achieve accurate automatic positioning, and multiple manual adjustments and calibrations are required, which not only consumes a lot of manpower and time, but also fails to meet the increasing production accuracy requirements. In addition, some existing high-precision positioning workbenches mostly use servo motors to achieve precise control, but servo motors are expensive, which undoubtedly increases the equipment procurement and operating costs of enterprises.

[0004] Based on the above situation, it is urgent to develop a self-positioning sliding workbench that can effectively control the cost while meeting the positioning accuracy requirements. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, an object of the present invention is to provide a self-positioning sliding workbench which has low manufacturing cost and can be precisely positioned.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The cam is an axially movable frame, and the cam is an axle-shaped frame, and the cam is an axle-shaped frame, and the cam is an axle-shaped frame. The cam is an axle-shaped frame, and the cam is an axle-shaped frame. The cam is an axle-shaped frame, and the cam is an axle-shaped frame. The cam is an axle-shaped frame, and the cam is an axle-shaped frame.

[0008] As a further improvement of the above technical solution, the chassis is provided with a front buffer and a rear buffer for absorbing the kinetic energy of the positioning block that is about to move into position.

[0009] As a further improvement of the above technical solution, the front locking structure includes a front limit block and a front corner pressing cylinder, and the pressure head of the front corner pressing cylinder presses the positioning block on the rear end surface of the front limit block, thereby limiting the movement of the slide; the rear locking structure includes a rear limit block and a rear corner pressing cylinder, and the pressure head of the rear corner pressing cylinder presses the positioning block on the front end surface of the rear limit block, thereby limiting the movement of the slide.

[0010] As a further improvement of the above technical solution, the front travel switch and the rear travel switch are both travel switches.

[0011] As a further improvement of the above technical solution, a left idler sprocket is provided on the left side of the driving sprocket, and a right idler sprocket is provided on the right side of the driving sprocket. The chain is wound around the left idler sprocket and the right idler sprocket, so that the chain wound around the driving sprocket is U-shaped.

[0012] As a further improvement of the above technical solution, the tightening structure includes a tightening screw connected to the end of the chain and a base block fixed on the slide, the tightening screw extends forward and backward and passes through the base block, and the tightening screw is provided with a tightening nut pressed on the base block.

[0013] As a further improvement of the above technical solution, the chassis is provided with two guide rails extending in the front-rear direction, the chain is located between the two guide rails, and the bottom of the slide is slidably connected to the guide rails via a slider.

[0014] As a further improvement of the above technical solution, the positioning block includes a first sub-block and a second sub-block arranged in parallel on the right at the bottom of the slide, the first sub-block can trigger the front travel switch and cooperate with the rear locking structure; the second sub-block can trigger the rear travel switch and cooperate with the front locking structure.

[0015] As a further improvement of the above technical solution, the slide sets up the working platform so that an avoidance gap is formed between the slide and the working platform, the front end of the base frame is provided with a front guard plate, the rear end of the base frame is provided with a rear guard plate, and a cover plate is provided between the front guard plate and the rear guard plate, which is located above the base frame and passes through the avoidance gap.

[0016] As a further improvement of the above technical solution, the base frame is provided with a guide rail guard plate on the outer side of the guide rail, and the slide is provided with a slider guard plate on the outer side of the slider.

[0017] Beneficial effects of the present invention: Compared with the workbenches on the market that generally use servo motors to achieve high-precision positioning, the self-positioning sliding workbench provided by the present invention innovatively uses a DC motor combined with a reducer and a sprocket chain transmission structure. The DC motor itself is relatively cheap, and the reducer does not significantly increase the cost while optimizing power transmission, while the sprocket chain transmission system has a simple structure and low manufacturing and maintenance costs. This combination significantly reduces the company's equipment procurement costs while achieving positioning accuracy equivalent to or even better than that of a servo motor, and in the subsequent long-term operation process, the low-cost maintenance and replacement of parts also effectively reduces operating costs, saving the company a large amount of capital investment and enhancing market competitiveness. In addition, the self-positioning sliding workbench provided by the present invention has completely changed the inefficient mode of traditional workbenches that rely on multiple manual adjustments and calibrations, and utilizes the precise coordination of the front and rear travel switches and the positioning blocks to achieve automatic and precise positioning of the slide when switching between front and rear workstations. This enables the workpiece placed on the work platform to be accurately delivered to the cutting area, greatly improving positioning accuracy, effectively meeting the increasingly stringent production accuracy requirements of industries such as hardware accessories and automotive accessories, significantly reducing cutting waste caused by positioning errors, improving product yield, and thus ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of the self-positioning sliding workbench provided by the present invention.

[0019] Figure 2 Schematic diagram of the movement and positioning of the traction mechanism traction carriage Figure 1 .

[0020] Figure 3 Schematic diagram of the movement and positioning of the traction mechanism traction carriage Figure 2 .

[0021] Figure 4 for Figure 3 A partial enlarged view of the middle L area.

[0022] Main component symbol description: 1- chassis, 11- guide rail, 12- slider, 13- rear guard plate, 14- cover plate, 15- guide rail guard plate, 16- slider guard plate, 2- slide, 3- working platform, 4- traction mechanism, 41- DC motor, 42- reducer, 43- driving sprocket, 44- first driven sprocket, 45- second driven sprocket, 46- chain, 47- left idler sprocket, 48- right idler sprocket, 5- tightening structure , 51-base block, 52-tensioning screw, 53-tightening nut, 61-first sub-block, 62-second sub-block, 71-front travel switch, 72-rear travel switch, 81-front locking structure, 811-front limit block, 812-front angle pressing cylinder, 82-rear locking structure, 821-rear limit block, 822-rear angle pressing cylinder, 91-front buffer, 92-rear buffer, A-front station, B-rear station. DETAILED DESCRIPTION

[0023] The present invention provides a self-positioning sliding workbench. In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the scope of protection of the present invention.

[0024] See also Figure 1-Figure 4 The present invention provides a self-positioning sliding workbench, comprising a base frame 1, a slide 2 slidably arranged on the base frame 1, a working platform 3 arranged on the slide 2, and a traction mechanism 4 for traction the slide 2 to move forward and backward, wherein the traction mechanism 4 comprises a DC motor 41 fixed on the base frame 1, a reducer 42 drivingly connected to the DC motor 41, a driving sprocket 43 arranged on the output end of the reducer 42, a first driven sprocket 44 arranged on the front end of the base frame 1, and a second driven sprocket 45 arranged on the rear end of the base frame 1, wherein the driving sprocket 43, the first driven sprocket 44 and the second driven sprocket 45 are arranged on the rear end of the base frame 1. The sprocket 44 and the second driven sprocket 45 form a transmission through a chain 46, and the two ends of the chain 46 are respectively connected to the slide 2 through a tightening structure 5; a positioning block is provided on the slide 2, and a front station A and a rear station B are provided on the base frame 1. A front travel switch 71 that can be triggered by the positioning block is provided at the front station A to detect whether the slide 2 has moved forward to the position; a rear travel switch 72 that can be triggered by the positioning block is provided at the rear station B to detect whether the slide 2 has moved backward to the position; the base frame 1 is provided with a front locking structure 81 and a rear locking structure 82 for locking the positioning block that has moved into position.

[0025] When the workbench is started for operation, the DC motor 41 receives the control signal and starts to operate. The speed and torque characteristics of the DC motor 41 are optimized and adjusted by the reducer 42. The reducer 42 reduces the higher speed of the motor output and increases the torque at the same time, so that the output is suitable for driving the slide 2 to move smoothly. The driving sprocket 43 at the output end of the reducer 42 rotates with the rotation of the reducer 42 shaft. Since the driving sprocket 43, the first driven sprocket 44 located at the front end of the chassis 1 and the second driven sprocket 45 at the rear end of the chassis 1 are connected to form a complete transmission system through the chain 46, the chain 46 starts to circulate under the drive of the driving sprocket 43. The two ends of the chain 46 are firmly connected to the slide 2 through a specially designed tightening structure 5. The cyclic movement of the chain 46 is converted into a traction force on the slide 2, which prompts the slide 2 to slide smoothly along the front and rear directions on the chassis 1, and realizes the switching of the slide 2 between the front station A (working station) and the rear station B (non-working station).

[0026] During the sliding process of the slide 2 on the base frame 1, the positioning block installed on the slide 2 moves synchronously. When the slide 2 moves toward the front station A, the positioning block gradually approaches the front station A area. Once the positioning block enters the sensing range of the front travel switch 71 at the front station A, the front travel switch 71 is immediately triggered and generates a corresponding electrical signal. This electrical signal is transmitted to the control system, and the control system determines that the slide 2 has accurately moved forward to the working station, that is, the cutting processing position based on the signal; after the front travel switch 71 detects that the slide 2 has moved forward to the position and feeds back the signal, the front locking structure 81 pre-set on the base frame 1 responds quickly. The front locking structure 81 accurately locks the positioning block that has moved into position through mechanical, electromagnetic or pneumatic methods (depending on the specific design), ensuring that the slide 2 will not be displaced due to equipment vibration, slight elastic deformation of the chain 46 or other external force interference when it is at the front station A, providing a stable platform support for the cutting operation.

[0027] On the contrary, when the carriage 2 moves backward to the rear station B, the positioning block approaches the rear station B, triggering the rear travel switch 72 at the rear station B. The rear travel switch 72 also sends a signal to the control system indicating that the carriage 2 has moved backward to the correct position, and the feedback control system indicates that the carriage 2 has returned to the non-working loading and unloading position. When the rear travel switch 72 detects that the carriage 2 has moved backward to the correct position, the rear locking structure 82 is immediately activated to firmly fix the carriage 2 at the rear station B, preventing the carriage 2 from accidentally moving during the loading and unloading of workpieces, thereby ensuring the safety of the operator and the accuracy of the loading and unloading of workpieces.

[0028] Compared with the workbench that generally uses servo motors to achieve high-precision positioning on the market, the self-positioning sliding workbench provided by the present invention innovatively uses a DC motor 41 combined with a reducer 42 and a sprocket chain 46 transmission structure. The DC motor 41 itself is relatively cheap, and the reducer 42 does not significantly increase the cost while optimizing power transmission, while the sprocket chain 46 transmission system has a simple structure and low manufacturing and maintenance costs. This combination significantly reduces the equipment procurement cost of the enterprise under the premise of achieving positioning accuracy equivalent to or even better than that of the servo motor, and in the subsequent long-term operation process, the low-cost maintenance and replacement of parts also effectively reduces the operating cost, saving a lot of capital investment for the enterprise and enhancing market competitiveness. In addition, the self-positioning sliding workbench provided by the present invention has completely changed the inefficient mode of the traditional workbench that relies on manual multiple adjustments and calibrations, and uses the precise cooperation of the front travel switch 71, the rear travel switch 72 and the positioning block to achieve automatic and precise positioning of the slide 2 when switching between the front station A and the rear station B. This enables the workpiece placed on the work platform 3 to be accurately delivered to the cutting area, greatly improving the positioning accuracy, effectively meeting the increasingly stringent production accuracy requirements of industries such as hardware accessories and automotive accessories, significantly reducing cutting waste caused by positioning errors, improving product yield, and thus ensuring product quality.

[0029] When the slide 2 moves at high speed and approaches the end of the workstation, the positioning block has a large kinetic energy. For this reason, the base frame 1 is provided with a front buffer 91 and a rear buffer 92 for absorbing the kinetic energy of the positioning block that is about to move into position. The setting of the front buffer 91 and the rear buffer 92 can effectively absorb the excess kinetic energy of the positioning block when it is about to move into position, and prevent the positioning block from directly hitting the sensor, locking structure or other related components on the base frame 1 due to inertia. This greatly reduces the risk of damage to these precision components caused by hard collisions, extends the service life of each component of the equipment, reduces the frequency and cost of equipment maintenance, and ensures the long-term stable and reliable operation of the entire self-positioning sliding workbench.

[0030] The front locking structure 81 includes a front limit block 811 and a front corner pressing cylinder 812, the pressure head of the front corner pressing cylinder 812 presses the positioning block on the rear end surface of the front limit block 811, thereby limiting the movement of the slide 2; the rear locking structure 82 includes a rear limit block 821 and a rear corner pressing cylinder 822, the pressure head of the rear corner pressing cylinder 822 presses the positioning block on the front end surface of the rear limit block 821, thereby limiting the movement of the slide 2. The front corner pressing cylinder 812 and the rear corner pressing cylinder 822 work in coordination with the corresponding front limit block 811 and rear limit block 821, and can achieve accurate and stable mechanical locking of the positioning block that has moved into place. When the slide 2 reaches the predetermined station, no matter it is the front station A or the rear station B, the corner downward pressure cylinder responds quickly, and its pressure head presses the positioning block tightly against the corresponding end face of the limit block with a large pressure, forming a stable friction force and blocking force, effectively limiting the accidental movement of the slide 2 in any direction, ensuring that during the laser cutting operation (front station A) or workpiece loading and unloading (rear station B), the worktable is always in a precise fixed position, ensuring processing accuracy and operational safety.

[0031] The design method of combining the limit block with the corner downward pressure cylinder is adopted, and the overall structure is relatively compact. Compared with large and complicated locking mechanical components, this design can be more reasonably arranged within the limited installation space of the chassis 1, and will not occupy too much surface area of ​​the chassis 1 to affect the installation and operation of other components, and can efficiently complete the locking function, and reserve sufficient space for other functional modules of the workbench such as the traction mechanism 4, the sensor, etc., to ensure the coordination and integrity of the entire workbench structure.

[0032] In this embodiment, the front travel switch 71 and the rear travel switch 72 are both travel switches. As a mechanical contact sensing device, the travel switch has a high position detection accuracy. When the positioning block on the slide 2 moves to a specific position to trigger the travel switch, the mechanical structure inside the travel switch will respond quickly and accurately, converting the physical contact into an electrical signal. This precise triggering mechanism can accurately determine whether the slide 2 has moved forward or backward to its position, providing a reliable position basis for subsequent cutting operations and workpiece loading and unloading processes, effectively ensuring the precision control of the entire processing process, and minimizing product quality problems caused by inaccurate positioning.

[0033] Of course, the front travel switch 71 and the rear travel switch 72 can also use infrared photoelectric sensors. However, compared with some detection technologies based on optics, electromagnetic induction, etc. that are more complex and susceptible to environmental interference, the travel switch has extremely high reliability in industrial environments. In common dusty, humid, and electromagnetically interfered environments such as hardware accessories and auto parts processing workshops, the travel switch can still work stably, and is not prone to false triggering or signal loss, ensuring the continuous and normal operation of the self-positioning sliding workbench, reducing equipment failure rate, reducing downtime caused by sensor failure, and improving production efficiency.

[0034] In order to increase the transmission wrap angle of the chain 46 on the driving sprocket 43, a left idler sprocket 47 is provided on the left side of the driving sprocket 43, and a right idler sprocket 48 is provided on the right side of the driving sprocket 43. The chain 46 passes through the left idler sprocket 47 and the right idler sprocket 48, so that the chain 46 passing through the driving sprocket 43 is U-shaped. A larger transmission wrap angle can ensure a tighter and more stable meshing between the chain 46 and the driving sprocket 43, effectively reducing the possibility of the chain 46 slipping when running at high speed or bearing a large load, thereby providing continuous, stable and reliable traction for the carriage 2, and ensuring the stability of the self-positioning sliding worktable during the forward and backward movement, which is crucial for high-precision laser cutting operations and can avoid cutting accuracy deviations caused by unstable worktable movement.

[0035] It should be emphasized that when the chain 46 meshes well with the driving sprocket 43 and the risk of slipping is reduced, the power can be more efficiently transmitted from the DC motor 41 to the chain 46 via the reducer 42 and the driving sprocket 43, and then to the carriage 2. This means that the energy output by the motor can be more fully utilized, reducing unnecessary energy loss during the transmission process, improving the energy utilization efficiency of the self-positioning sliding workbench, and in the long-term operation process, helping to reduce the electricity cost of the enterprise and achieve energy saving and efficiency improvement.

[0036] Specifically, the tightening structure 5 includes a tightening screw 52 connected to the end of the chain 46 and a base block 51 fixed on the slide 2. The tightening screw 52 extends forward and backward and passes through the base block 51. The tightening screw 52 is provided with a tightening nut 53 pressed on the base block 51. In the initial installation and commissioning stage of the equipment, by rotating the tightening nut 53, the tightening screw 52 pulls the end of the chain 46, and the tightness of the chain 46 is easily controlled to ensure that the chain 46 has appropriate tension during the transmission process, which can not only avoid problems such as slipping and tooth skipping caused by the chain 46 being too loose, affecting the transmission efficiency and the moving accuracy of the workbench, but also prevent excessive wear caused by the over-tightening of the chain 46 and additional stress on the transmission components, thereby extending the service life of the chain 46 and related components.

[0037] Furthermore, the base frame 1 is provided with two guide rails 11 extending in the front-to-back direction, the chain 46 is located between the two guide rails 11, and the bottom of the slide 2 is slidably connected to the guide rails 11 through the slider 12. The two guide rails 11 extending in the front-to-back direction provide a precise moving path for the slide 2, and the slider 12 at the bottom of the slide 2 is tightly matched with the guide rails 11, so that the slide 2 can only slide forward and backward on the base frame 1 along the direction defined by the guide rails 11. This precise guiding mechanism effectively avoids the slide 2 from running off, shaking and other unstable phenomena during the movement process, ensures that the workpiece placed on the working platform 3 can be accurately transported to the cutting area, greatly improves the positioning accuracy of the cutting operation, and meets the needs of hardware accessories and automotive accessories industries for high-precision processing.

[0038] In this embodiment, the positioning block includes a first sub-block 61 and a second sub-block 62 arranged side by side at the bottom of the slide 2. The first sub-block 61 can trigger the front travel switch 71 and cooperate with the rear locking structure 82; the second sub-block 62 can trigger the rear travel switch 72 and cooperate with the front locking structure 81. After starting the workbench, the DC motor 41 runs, driving the active sprocket 43 to rotate through the reducer 42, and the active sprocket 43 drives the chain 46. The chain 46 drags the slide 2 to slide on the bottom frame 1 in the front-back direction by means of the tightening structure 5. The first sub-block 61 and the second sub-block 62 arranged side by side at the bottom of the slide 2 move synchronously accordingly.

[0039] When the workbench on the carriage 2 slides to the front station A, the first sub-block 61 triggers the front travel switch 71, and the control system waits for the carriage 2 to be fully in place. At this time, the front locking structure 81 is activated to mechanically limit the movement of the second sub-block 62. For example, the front limit block 811 blocks the forward path of the second sub-block 62, and the pressure head of the front corner downward pressure cylinder 812 presses down to press the second sub-block 62 against the front limit block 811, thereby limiting the freedom of movement of the carriage 2 from the side, ensuring the stability of the carriage 2 in the cutting operation at the front station A, and preventing it from being displaced due to external interference.

[0040] When the workbench on the carriage 2 slides to the rear station B, the second sub-block 62 triggers the rear travel switch 72, and as the carriage 2 moves backward to its position, the rear locking structure 82 takes effect. The rear limit block 821 limits the retreat path of the first sub-block 61, and the rear corner pressing cylinder 822 presses the first sub-block 61 against the rear limit block 821 to prevent the carriage 2 from accidentally moving forward, thereby ensuring the safety and accuracy of loading and unloading workpieces at the rear station B.

[0041] The first sub-block 61 and the second sub-block 62 are respectively responsible for the sensing and matching locking of different workstations, and a dual positioning guarantee mechanism is constructed. The position of the carriage 2 is monitored and controlled from two directions. Compared with a single positioning method, it can more accurately capture whether the carriage 2 has reached the predetermined workstation, effectively offset the positioning deviation caused by the slight error of the chain 46 transmission, the mechanical vibration of the carriage 2 itself, and other factors, and provide extremely high positioning accuracy for precision processing such as laser cutting, significantly improve product quality, and reduce the probability of waste.

[0042] This cross-locking design allows the slide 2 to obtain stable support and restraint at both the front and rear stations B. At the front station A, even if a large impact force or vibration is generated during the cutting process, the slide 2 will not shake easily due to the strong locking of the second sub-block 62 by the front locking structure 81; similarly, when loading and unloading workpieces at the rear station B, the constraint of the first sub-block 61 by the rear locking structure 82 ensures that the slide 2 is stationary, avoiding accidents such as the workpiece falling or colliding. This greatly improves the operating stability of the workbench under different working conditions, reduces the hidden dangers of equipment failure, and ensures the continuity of production.

[0043] Preferably, the slide 2 sets up the working platform 3 so that an avoidance gap is formed between the slide 2 and the working platform 3, the front end of the base frame 1 is provided with a front guard plate, the rear end of the base frame 1 is provided with a rear guard plate 13, and a cover plate 14 located above the base frame 1 and passing through the avoidance gap is provided between the front guard plate and the rear guard plate 13. During the laser cutting process of hardware accessories and automotive accessories, a large amount of metal debris will be generated. The front guard plate, the rear guard plate 13 and the cover plate 14 form a relatively closed protection system, which effectively blocks the debris generated by the cutting from splashing around and prevents it from falling into the area where the key transmission components and moving components such as the slide 2, the chain 46, and the guide rail 11 are located. If these debris enter the internal structure, it may cause many problems such as increased wear of components, jamming of the chain 46, and failure of the sensor, affecting the normal operation of the workbench. The complete protection structure can ensure the internal cleanliness of the equipment, extend the service life of the equipment, and reduce maintenance costs.

[0044] Preferably, the base frame 1 is provided with a guide rail guard plate 15 on the outer side of the guide rail 11, and the slide 2 is provided with a slider guard plate 16 on the outer side of the slider 12. The industrial environment of hardware accessories and auto parts processing workshops is full of a large amount of metal debris, dust and other impurities. The guide rail guard plate 15 provides a solid barrier for the guide rail 11, which can effectively prevent these foreign objects from entering the matching area between the guide rail 11 and the slider 12, and avoid the wear and corrosion of the guide rail 11 caused by the accumulation of foreign objects, affecting its accuracy and service life. Similarly, the slider guard plate 16 prevents the slider 12 from directly contacting external contaminants, ensuring the smooth operation of the slider 12, maintaining its good mechanical properties, reducing the problems of the slider 12 being stuck and damaged due to impurities, greatly extending the life of the guide rail 11 and the slider 12, a pair of key moving parts, and reducing the equipment maintenance cost.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A self-positioning sliding workbench, characterized in that: The sprocket wheel is annularly fixed to the bottom of the gear train, and the sprocket wheel is adjacent to the gear train, and the sprocket wheel is adjacent to the gear train, and the sprocket wheel is adjacent to the gear train, and the sprocket wheel is adjacent to the gear train.

2. The self-positioning sliding workbench according to claim 1, characterized in that: The base frame is provided with a front buffer and a rear buffer for absorbing the kinetic energy of the positioning block that is about to move into position.

3. The self-positioning sliding workbench according to claim 2, characterized in that: The front locking structure includes a front limit block and a front corner pressing cylinder, and the pressure head of the front corner pressing cylinder presses the positioning block on the rear end surface of the front limit block, thereby limiting the movement of the slide; the rear locking structure includes a rear limit block and a rear corner pressing cylinder, and the pressure head of the rear corner pressing cylinder presses the positioning block on the front end surface of the rear limit block, thereby limiting the movement of the slide.

4. The self-positioning sliding workbench according to claim 1, characterized in that: The front travel switch and the rear travel switch are both travel switches.

5. The self-positioning sliding workbench according to claim 1, characterized in that: A left idle sprocket is arranged on the left side of the driving sprocket, and a right idle sprocket is arranged on the right side of the driving sprocket. The chain is wound around the left idle sprocket and the right idle sprocket, so that the chain wound around the driving sprocket is U-shaped.

6. The self-positioning sliding workbench according to claim 5, characterized in that: The tightening structure comprises a tightening screw connected to the end of the chain and a base block fixed on the slide. The tightening screw extends forward and backward and passes through the base block. The tightening screw is provided with a tightening nut pressed on the base block.

7. The self-positioning sliding workbench according to claim 1, characterized in that: The base frame is provided with two guide rails extending in the front-rear direction, the chain is located between the two guide rails, and the bottom of the slide frame is slidably connected with the guide rails through a slider.

8. The self-positioning sliding workbench according to any one of claims 1 to 7, characterized in that: The positioning block includes a first sub-block and a second sub-block which are arranged in parallel at the bottom of the slide, the first sub-block can trigger the front travel switch and cooperate with the rear locking structure; the second sub-block can trigger the rear travel switch and cooperate with the front locking structure.

9. The self-positioning sliding workbench according to claim 7, characterized in that: The slide sets up the working platform so that an avoidance gap is formed between the slide and the working platform. A front guard plate is provided at the front end of the base frame, and a rear guard plate is provided at the rear end of the base frame. A cover plate is provided between the front guard plate and the rear guard plate, which is located above the base frame and passes through the avoidance gap.

10. The self-positioning sliding workbench according to claim 9, characterized in that: The base frame is provided with a guide rail guard plate on the outer side of the guide rail, and the slide frame is provided with a slide block guard plate on the outer side of the slide block.

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