A backlash eliminating device and screw press

Abstract

The present application relates to the field of presses, and in particular to a backlash elimination device and a screw press, the backlash elimination device comprising: a bearing member, used to be fixed on the upper side of a slider; a through hole, provided in the bearing member, used to coaxially penetrate a stud threadedly connected to the slider; an arc plate, swingably arranged on the bearing member, the swing axis of the arc plate being arranged horizontally, and one end of the arc plate being able to abut against an upper wall of a spiral groove of the stud as the arc plate swings; a positioning component, provided on the bearing member, used to limit the relative position of the arc plate and the bearing member. The present application has the effect of improving the axial matching accuracy of the stud and the slider, and eliminating the axial matching clearance between the stud and the slider.

Description

Technical Field

[0001] The present application relates to the field of presses, and in particular to a backlash elimination device and a screw press. Background Art

[0002] Screw press is a general term for a pressurizing machine that generates pressure by rotating one or more sets of outer and inner bolts in a frame. Screw presses can be divided into two types: one that generates static pressure by applying torque to the bolts, and the other that concentrates the rotational energy of the flywheel fixed on the bolts for forming.

[0003] There is a Chinese invention patent application with reference application number 201210588587.3, which discloses an energy measurement and control system for a double-disc friction screw press, including a double-disc friction screw press, a human-machine interface parameter setting and display device, which sets the striking energy setting value of the double-disc friction screw press and displays the actual output energy value; a slider movement detection device, which detects the slider movement speed of the double-disc friction screw press and outputs a pulse signal; a controller, which calculates the current actual output energy value of the screw press based on the pulse signal and compares it with the striking setting value, and controls and adjusts the actual output energy value of the screw press to approach the striking setting value.

[0004] This patent application uses the pulse signal emitted by the slider motion detection device, and the controller calculates the current actual output energy of the screw press and compares it with the strike set value, thereby controlling the actual output energy value of the screw press to approach the strike set value, thereby improving the forging accuracy and repeatability of the double-disc friction screw press and making it easier for operators to intuitively understand the current operating status of the machine.

[0005] Regarding the above-mentioned technical solution, the inventor discovered that since the press uses a screw and a nut to drive the slider to move vertically, certain errors will inevitably occur during the processing of the screw and the nut, which will lead to a certain gap between the screw and the nut after matching, reducing the actual movement accuracy of the slider, and further causing errors in the actual measured output energy value, affecting the final result. Summary of the invention

[0006] In order to improve the axial fitting accuracy of the stud and the slider and eliminate the axial fitting clearance between the stud and the slider, the present application provides a clearance eliminating device and a screw press.

[0007] The first aspect of the present application provides a backlash elimination device, which adopts the following technical solution:

[0008] A backlash elimination device, comprising:

[0009] A bearing member, used for fixing on the upper side of the slider;

[0010] A through hole is provided in the bearing member and is used for coaxially passing a stud threadedly connected to the slider;

[0011] An arc-shaped plate is swingably arranged on the bearing member, and a swing axis of the arc-shaped plate is horizontally arranged. As the arc-shaped plate swings, one end of the arc-shaped plate can abut against an upper wall of a spiral groove of the stud;

[0012] The positioning component is arranged on the bearing member and is used to limit the relative position between the arc plate and the bearing member.

[0013] By adopting the above technical scheme, when in use, the bearing member can be fixed to the upper side of the slider, and the stud threadedly connected to the slider is passed through the through hole to complete the assembly of the bearing member and the slider. Then, the arc plate is pushed, so that one end of the arc plate can be tilted up with the swing and inserted into a spiral groove of the stud and pressed against the upper wall of the spiral groove, that is, the lower side of the spiral strip on the upper side of the spiral groove. Then, the relative position of the arc plate and the bearing member is limited by the positioning component, so that the arc plate and the slider can be pressed against each other, thereby eliminating the axial gap between the stud and the slider, making the stud and the slider cooperate more precisely, and ensuring the actual movement accuracy of the slider. In addition, due to the coordination setting of the arc plate and the through hole, as long as the diameter of the stud meets the following two conditions: not greater than the diameter of the through hole, and the arc plate can extend into the thread groove of the stud with the swing, the gap eliminating device can adapt to the coordination of studs and sliders of different diameters within a certain range, meet different needs, and have a wider range of use.

[0014] Optionally, a plurality of the arc-shaped plates are provided, and the plurality of arc-shaped plates are evenly arranged around the through hole.

[0015] By adopting the above technical solution, multiple arc plates are arranged around the through hole. When in use, one ends of the multiple arc plates can be simultaneously inserted into the spiral groove and pressed against the upper wall of the spiral groove, thereby eliminating the axial gap between the stud and the slider at the same time, thereby ensuring the stability of the cooperation between the slider and the stud.

[0016] Optionally, the plurality of arc-shaped plates swing toward each other, can be inserted into the spiral groove of the stud, and abut against the peripheral wall and the top wall of the spiral groove of the stud.

[0017] By adopting the above technical solution, after one end of the multiple arc plates is inserted into the spiral groove, they abut against the peripheral wall and upper wall of the spiral groove, which can simultaneously eliminate the axial and radial gaps between the falling stud and the slider, further ensuring the precision of the fit between the slider and the stud.

[0018] Optionally, the positioning component includes:

[0019] A plurality of push blocks are respectively arranged at one end of each arc-shaped plate away from each other, and each push block is movably arranged on the bearing member in the direction of the through hole, and as the push block moves in the direction of the through hole, it can push one end of the plurality of arc-shaped plates close to the through hole to swing upward to be inserted into the spiral groove of the stud;

[0020] The pushing assembly is arranged on the bearing member and is used for pushing each pushing block to move.

[0021] By adopting the above technical solution, the push block is driven to move in the direction of the through hole, which can push the arc plate to swing, so that the arc plate can be inserted into the arc groove as pushed by the push block. Then, the arc plate can be moved by pushing the push block through the pushing component, which is easy to operate.

[0022] Optionally, the push component includes:

[0023] A pull cable, movably connected to each of the push blocks in sequence;

[0024] The rotating shaft is rotatably arranged on the bearing member, and both ends of the cable are fixed to the rotating shaft. As the rotating shaft rotates, the cable can be driven to be wound around the rotating shaft to push each push block to move toward the through hole.

[0025] The rotary drive unit is used to realize the rotation and stillness of the rotating shaft.

[0026] By adopting the above technical solution, when working, the rotary drive unit drives the rotating shaft to rotate, which can drive the cable to be wound on the rotating shaft. During the winding process of the cable, the push blocks will be dragged to move in the direction of approaching each other, thereby synchronously pushing the arc plates to swing until the arc plates are all pressed against the studs, thereby achieving automatic adaptation of each arc plate to the matching relationship with the studs, so that the push blocks and the arc plates cooperate to press the studs, eliminating the axial and circumferential gaps between the slider and the studs.

[0027] Optionally, a horizontally arranged limiting shaft is fixed on the upper side of the arc opening of each arc plate corresponding to the bearing member, so as to limit the arc plate to swing only along the limiting shaft.

[0028] By adopting the above technical solution, the provided limiting axis can effectively limit the swinging direction of the arc plate, thereby ensuring the stability of the swinging of the arc plate.

[0029] Optionally, the rotary drive unit includes:

[0030] A worm gear is coaxially fixed to the rotating shaft;

[0031] A worm, rotatably disposed on the carrier and meshing with the worm wheel;

[0032] The motor is fixed to the bearing member and is used to drive the worm to rotate.

[0033] By adopting the above technical solution, when working, the motor drives the worm to rotate, which can drive the worm wheel to rotate, thereby driving the rotating shaft to rotate, thereby tightening or loosening the cable, and due to the matching mode of the worm wheel and the worm, automatic loosening of the cable is avoided.

[0034] Optionally, a plurality of limit grooves are provided on one side of the push block along its length direction;

[0035] The bearing member is provided with a sliding column movably on one side corresponding to each push block;

[0036] The bearing member is provided with an elastic member at a position corresponding to each of the slide posts, for pushing the slide post to move to any limiting groove inserted into the corresponding push block;

[0037] The end of the sliding column is provided with an inclined surface away from the through hole, so as to automatically withdraw from the limiting groove when the push block moves toward the through hole.

[0038] By adopting the above technical solution, the cooperation between the sliding column driven by the elastic member and the limit groove can make it possible for the sliding column to further lock the position of the push block after the push block pushes the arc plate against the stud, thereby reducing the burden of the cable and improving the stability of the fixed position of the arc plate. The inclined surface is set to prevent the push block from being restricted by the sliding column and unable to move when the push block is pulled by the cable, thereby ensuring that the cable can drive the slider to move, thereby driving the arc plate to swing.

[0039] In a second aspect, the present application provides a screw press, which adopts the following technical solution:

[0040] A screw press comprises a frame, a slider vertically slidably connected to the frame, and a stud threadedly connected to the slider and rotatably arranged on the frame, and also comprises the above-mentioned clearance eliminating device.

[0041] By adopting the above technical solution, the provided clearance eliminating device can eliminate the axial clearance between the stud and the slider, so that the stud and the slider can be matched more precisely, thereby improving the accuracy of the slider movement.

[0042] Optionally, a synchronization shaft is fixed to one side of the slider;

[0043] The frame is rotatably provided with a vertically arranged rotating column, a spiral ring groove is provided on the circumference of the rotating column, one end of the synchronous shaft is inserted into the spiral ring groove, and the vertical movement of the synchronous shaft can drive the rotating column to rotate;

[0044] A rotary encoder is connected to one end of the rotating column.

[0045] By adopting the above technical solution, the vertical movement of the slider can drive the vertical movement of the synchronization shaft, thereby driving the rotating column to rotate synchronously through the cooperation of the synchronization shaft and the spiral ring groove. The rotation of the rotating column can drive the rotary encoder to rotate synchronously, so that the linear motion of the slider can be converted into a pulse signal output, so as to facilitate the subsequent calculation of the actual movement speed of the slider.

[0046] In summary, the present application includes at least one of the following beneficial technical effects:

[0047] 1. When in use, the bearing member can be fixed to the upper side of the slider, and the stud threadedly connected to the slider is passed through the through hole to complete the assembly of the bearing member and the slider. Then, the arc plate can be pushed to make one end of the arc plate tilt up with the swing and inserted into a spiral groove of the stud and pressed against the upper wall of the spiral groove, that is, the lower side of the spiral strip on the upper side of the spiral groove. Then, the relative position of the arc plate and the bearing member is limited by the positioning component. In this way, the arc plate and the slider can be pressed against each other, thereby eliminating the axial gap between the stud and the slider, making the stud and the slider cooperate more precisely and ensuring the actual movement accuracy of the slider. In addition, due to the coordinated setting of the arc plate and the through hole, as long as the diameter of the stud meets the following two conditions: not greater than the diameter of the through hole, and the arc plate can extend into the thread groove of the stud with the swing, the gap elimination device can adapt to the coordination of studs and sliders of different diameters within a certain range, meet different needs, and have a wider range of use.

[0048] 2. After one end of the multiple arc-shaped plates is inserted into the spiral groove, they abut against the peripheral wall and upper wall of the spiral groove at the same time, which can simultaneously eliminate the axial and radial gaps between the stud and the slider, and further ensure the stability of the matching between the slider and the stud;

[0049] 3. During operation, the rotary drive unit drives the shaft to rotate, which can drive the cable to be wound on the shaft. During the winding process of the cable, the push blocks will be dragged to move in the direction of approaching each other, thereby synchronously pushing the arc plates to swing until the arc plates are all pressed against the studs, thereby realizing the automatic adaptation of each arc plate to the matching relationship with the studs, so that the push blocks and the arc plates cooperate to press the studs, eliminating the axial and circumferential clearances between the sliders and the studs. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a schematic cross-sectional structure diagram of an anti-backlash device in an embodiment of the present application;

[0051] Figure 2 yes Figure 1 A enlarged schematic diagram of the part;

[0052] Figure 3 Is a schematic cross-sectional structure diagram of another embodiment of the present application to eliminate the gap device;

[0053] Figure 4 yes Figure 3 B in the enlarged schematic diagram;

[0054] Figure 5 Is a top view of another embodiment of the present application to eliminate the backlash device;

[0055] Figure 6 yes Figure 5 AA-direction cross-sectional schematic diagram;

[0056] Figure 7 yes Figure 6 An enlarged schematic diagram of section C;

[0057] Figure 8 This is a schematic diagram of the push block structure of another anti-backlash device in the embodiment of the present application;

[0058] Fig. 9 It is a structural schematic diagram of a screw press in an embodiment of the present application.

[0059] Explanation of the reference numerals in the accompanying drawings: 1. bearing member; 11. through hole; 12. arc groove; 13. limiting shaft; 14. slide groove; 15. containing groove; 151. slide column; 152. elastic member; 153. inclined surface; 154. dial plate; 2. arc plate; 3. positioning member; 31. tightening bolt; 32. push block; 321. through hole; 322. limiting groove; 33. cable; 34. rotating shaft; 35. rotary drive unit; 351. worm gear; 352. worm; 4. frame; 5. slider; 51. synchronous shaft; 6. stud; 7. rotating column; 71. spiral ring groove; 8. rotary encoder. DETAILED DESCRIPTION

[0060] The main problem to be solved by this application is that the spiral transmission cooperation between the screw and the slider of the forging machine will produce a certain axial clearance, thereby reducing the actual movement accuracy of the slider. To this end, this application mainly adopts the following ideas:

[0061] A backlash elimination device comprises: a bearing member for fixing on the upper side of a slider; a through hole provided in the bearing member for coaxially passing through a stud threadedly connected to the slider; an arc plate swingably arranged on the bearing member, wherein the swing axis of the arc plate is horizontally arranged, and as the arc plate swings, one end of the arc plate can abut against an upper wall of a spiral groove of the stud; and a positioning component arranged on the bearing member for limiting the relative position of the arc plate and the bearing member.

[0062] By adopting the above scheme, when in use, the bearing member can be fixed to the upper side of the slider, and the stud threadedly connected to the slider is passed through the through hole to complete the assembly of the bearing member and the slider. Then, the arc plate can be pushed to make one end of the arc plate tilt up with the swing and inserted into a spiral groove of the stud and pressed against the upper wall of the spiral groove, that is, the lower side of the spiral strip on the upper side of the spiral groove. Then, the relative position of the arc plate and the bearing member is limited by the positioning component, so that the arc plate and the slider can be pressed against each other, thereby eliminating the axial gap between the stud and the slider, making the stud and the slider cooperate more precisely and ensuring the actual movement accuracy of the slider. In addition, due to the coordination setting of the arc plate and the through hole, as long as the diameter of the stud meets the following two conditions: not greater than the diameter of the through hole, and the arc plate can extend into the thread groove of the stud with the swing, the gap elimination device can adapt to the coordination of studs and sliders of different diameters within a certain range, meet different needs, and have a wider range of use.

[0063] The present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0064] Reference Figure 1 A backlash elimination device includes a carrier 1. The size and shape of the carrier 1 can be made according to actual usage requirements, such as a hollow structure or a disc-shaped body. It is mainly used to be fixed on the upper side of a press slide 5, and the fixing method of the carrier 1 and the press slide 5 can also be implemented according to different requirements, such as using threaded connection or screw connection, or using other clamping mechanisms such as clamps.

[0065] In this embodiment, the support member 1 is illustrated by a disc-shaped structure, and a through hole 11 is vertically opened at the axial position of the support member 1, so that the stud 6 of the press can pass through the through hole 11 to realize spiral transmission with the slider 5 after the support member 1 is fixed to the slider 5. More specifically, the axis of the through hole 11 should be coaxial with the axis of the stud 6.

[0066] Reference Figure 1 and Figure 2 A plurality of arcuate grooves 12 are evenly formed on the upper side of the carrier 1 with the through hole 11 as the center. The axial direction of each arcuate groove 12 is horizontally arranged, and one end of each arcuate groove 12 is arranged toward the axial direction of the through hole 11. An arcuate plate 2 is fitted in each arcuate groove 12. The arcuate plate 2 swings along the arcuate groove 12, so that one end of the arcuate plate 2 close to the through hole 11 can extend upward to the arcuate groove 12 and move toward the through hole 11 to above the through hole 11.

[0067] In order to limit the swinging track of the arc plate 2, a limiting shaft 13 is horizontally fixed to the middle of the arc opening of the arc plate 2 on the bearing member 1. The axial direction of the limiting shaft 13 is the same as the swinging axis direction of the arc plate 2, and the lower side of the circumference of the limiting shaft 13 can press against the arc plate 2. In this way, the rotation track of the arc plate 2 is limited by the pressing of the limiting shaft 13. A positioning component 3 for limiting the relative position of the arc plate 2 and the bearing member 1 is also provided on the bearing member 1.

[0068] After the carrier 1 is fixed to the upper side of the slider 5, the multiple arc plates 2 can be pushed to swing, so that the ends of the multiple arc plates 2 close to the through hole 11 are simultaneously inserted into the spiral groove and pressed against the upper wall of the spiral groove. Then, the relative position of each arc plate 2 and the slider 5 is restricted by the positioning component 3, so that the axial gap between the stud 6 and the slider 5 can be eliminated, thereby ensuring the stability of the cooperation between the slider 5 and the stud 6.

[0069] In addition, in order to further improve the matching accuracy between the slider 5 and the stud 6, the sizes of the arc plate 2 and the arc groove 12 can be adjusted according to the needs, so that the multiple arc plates 2 tend to swing towards each other, can be inserted into the spiral groove of the stud 6 and abut against the peripheral wall and top wall of the spiral groove of the stud 6. In this way, after one end of the multiple arc plates 2 is inserted into the spiral groove, it abuts against the peripheral wall and top wall of the spiral groove, which can simultaneously eliminate the axial and radial gaps between the stud 6 and the slider 5, and further ensure the matching accuracy of the slider 5 and the stud 6.

[0070] In this embodiment, the positioning component 3 is mainly used to limit the relative position of the arc plate 2 and the supporting member 1. Therefore, the positioning component 3 can directly adopt the tightening bolt 31, that is, the tightening bolt 31 is directly screwed to the supporting member 1, and the end of the tightening bolt 31 extends into the arc groove 12 and can abut against the end of the arc plate 2 away from the through hole 11, so that when in use, the tightening bolt 31 can be rotated to push the arc plate 2 to swing along the arc groove 12 to realize the tightening stud 6.

[0071] In addition, since the positioning component 3 in the above embodiment is mainly used to realize the separate control of each arc plate 2, the operation is relatively troublesome. Therefore, in another embodiment of the present application, a positioning component 3 is proposed to complete the synchronous automatic adjustment of multiple arc plates 2, so that each arc plate 2 is synchronously pressed against the stud 6 to achieve the clearance elimination of the slider 5 and the stud 6. The following is a specific description:

[0072] Reference Figure 3 and Figure 4 The positioning component 3 includes a push block 32 and a push assembly.

[0073] A slide groove 14 connected to the arc groove 12 is provided at one end of the carrier 1 corresponding to each arc groove 12 away from the through hole 11, and one end of the length of the slide groove 14 is also facing the through hole 11. Specifically, the arrangement direction of the arc groove 12 and the slide groove 14 is set along the radial direction of the through hole 11, and the push block 32 slides along the slide groove 14 toward the through hole 11, which can push the arc plate 2 to swing toward the through hole 11, so that the end of the arc plate 2 close to the through hole 11 swings upward to the spiral groove inserted in the stud 6.

[0074] The pushing component includes a cable 33 , a rotating shaft 34 and a rotary driving unit 35 .

[0075] Reference Figure 4 and Figure 5 The rotating shaft 34 is vertically arranged and rotatably connected to the bearing member 1. A through hole 321 is horizontally opened at one end of each push block 32 away from the through hole 11. The cable 33 passes through each through hole 321 in sequence, and both ends of the cable 33 are fixed to the rotating shaft 34. The rotary drive unit 35 is connected to the rotating shaft 34 to drive the rotating shaft 34 to rotate. During operation, the rotating shaft 34 is driven to rotate by the rotary drive unit 35, which can drive the cable 33 to be wound on the rotating shaft 34. During the winding process of the cable 33, each push block 32 will be dragged to move in a direction close to each other, thereby synchronously pushing each arc plate 2 to swing until the arc plate 2 is pressed against the stud 6, realizing the automatic adaptation of each arc plate 2 to the matching relationship with the stud 6, so that the push block 32 and the arc plate 2 cooperate to press against the stud 6, eliminating the axial and circumferential clearance between the slider 5 and the stud 6.

[0076] The rotary drive unit 35 can directly adopt a motor, that is, the motor output shaft is fixed to one end of the rotating shaft 34. The rotating shaft 34 is directly driven by the rotation of the motor to rotate, so as to realize the contraction of the cable 33. The rotating shaft 34 is fixed by stopping the motor to realize the tightening state of the cable 33. The rotation reversal is realized by reversing the motor to realize the loosening of the cable 33.

[0077] Reference Figure 6 and Figure 7 In order to reduce the workload of the motor, a worm gear transmission system can also be set between the motor and the rotation. Specifically, the configuration is as follows: a worm wheel 351 is coaxially fixed to one end of the rotating shaft 34, a worm 352 is rotatably connected to one side of the supporting member 1 corresponding to the worm wheel 351, the worm 352 is meshed with the worm wheel 351, the motor is fixed to the supporting member 1, and the output shaft of the motor is coaxially connected to the worm 352. During operation, the motor drives the worm 352 to rotate, which can drive the worm wheel 351 to rotate, thereby driving the rotating shaft 34 to rotate, thereby achieving the tightening or loosening of the cable 33, and due to the matching mode of the worm wheel 351 and the worm 352, the automatic loosening of the cable 33 is avoided.

[0078] Furthermore, in order to reduce the thrust force exerted on the cable 33 when the cable 33 pushes the push block 32 to press against the arc-shaped plate 2, the following configuration can be performed in another embodiment of the present application:

[0079] Reference Figure 7 and Figure 8 , a plurality of limiting grooves 322 are formed on one side of each push block 32 along its length direction, and a receiving groove 15 is formed on one side of the bearing member 1 corresponding to each slide groove 14, the length direction of the receiving groove 15 is perpendicular to the length direction of the limiting groove 322, and a sliding column 151 is slidably connected in the receiving groove 15 along its length direction, and the sliding column 151 can be slidably inserted into any limiting groove 322. An elastic member 152, such as a spring, is also fixed in each receiving groove 15, and the elastic member 152 is fixed between the sliding column 151 and the receiving groove 15, and the elastic member 152 can push the sliding column 151 to slide in the direction of the slide groove 14 to push against the push block 32, so that during the movement of the push block 32, the sliding column 151 can be automatically inserted into any limiting groove 322 of the push block 32.

[0080] In order to prevent the cooperation between the limit groove 322 and the slide post 151 from interfering with the cable 33 pushing the push block 32, an inclined surface 153 is provided at the end of the slide post 151 away from the through hole 11. When the push block 32 moves toward the through hole 11, the inclined surface 153 provided on the slide post 151 can make the slide post 151 automatically withdraw from the limit groove 322. In order to facilitate the movement of the push block 32 away from the through hole 11, a dial plate 154 is fixed on the upper side of the slide post 151. The dial plate 154 extends out of the upper side of the bearing member 1. The slide post 151 can be driven to move synchronously by the fluctuation of the dial plate 154, so that the slide post 151 is pushed out of the limit groove 322.

[0081] Through the above-mentioned setting, the cooperation between the sliding column 151 driven by the elastic member 152 and the limiting groove 322 can enable the sliding column 151 to further lock the position of the pushing block 32 after the pushing block 32 pushes the arc plate 2 to press against the stud 6, thereby reducing the burden of the cable 33 and improving the stability of the fixed position of the arc plate 2. The setting of the inclined surface 153 can prevent the pushing block 32 from being restricted by the sliding column 151 and unable to move when the pushing block 32 is pulled by the cable 33, thereby ensuring that the cable 33 can drive the pushing block 32 to move, thereby driving the arc plate 2 to swing.

[0082] Reference Fig. 9The embodiment of the present application also discloses a screw press, including a frame 4, a slider 5 is vertically slidably connected in the frame 4, a stud 6 is threadedly connected in the slider 5, and the upper end of the stud 6 extends out of the slider 5, the upper end of the stud 6 is rotatably connected to the frame 4 and extends out of the upper side of the frame 4, and the upper side of the frame is also provided with a driving component that can drive the double friction disk of the stud 6 and cooperate with the flywheel, which is a prior art and will not be repeated in this embodiment. The anti-backlash device described in the above embodiment is arranged between the slider 5 and the stud 6. When working, the driving component drives the stud 6 to rotate back and forth, which can drive the slider 5 to reciprocate vertically to realize the stamping work, and the anti-backlash device can eliminate the axial gap between the stud 6 and the slider 5, so that the stud 6 and the slider 5 cooperate more precisely, and the accuracy of the movement of the slider 5 is improved.

[0083] A horizontally arranged synchronous shaft 51 is fixed to one side of the slider 5, and a vertically arranged rotating column 7 is rotatably connected to one side of the frame 4 corresponding to the synchronous shaft 51. A rotary encoder 8 is connected to one end of the rotating column 7. A spiral ring groove 71 is provided on the circumference of the rotating column 7. One end of the synchronous shaft 51 is inserted into the spiral ring groove 71. When the synchronous shaft 51 is driven by the slider 5 to move vertically, the rotating column 7 can be driven to rotate synchronously through the cooperation of the synchronous shaft 51 and the spiral ring groove 71, thereby driving the rotary encoder 8 to rotate synchronously. The linear motion of the slider 5 is converted into a pulse signal output through the rotary encoder 8, so as to measure the movement speed of the slider 5.

[0084] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application. In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the embodiments of the present invention.

Claims

1. A backlash elimination device, characterized in that: include: A bearing member (1) used for being fixed on the upper side of the slider (5); A through hole (11) is provided in the bearing member (1) and is used for coaxially passing through a stud (6) threadedly connected to the slider (5); An arc-shaped plate (2) is swingably arranged on the bearing member (1), and the swing axis of the arc-shaped plate (2) is arranged horizontally. As the arc-shaped plate (2) swings, one end of the arc-shaped plate (2) can abut against an upper wall of a spiral groove of a stud (6); A positioning component (3) is arranged on the bearing member (1) and is used to limit the relative position between the arc plate (2) and the bearing member (1); A plurality of the arc-shaped plates (2) are provided, and the plurality of arc-shaped plates (2) are evenly arranged around the through hole (11); The plurality of arc-shaped plates (2) swing in a direction toward each other, and can be inserted into the spiral groove of the stud (6) and abut against the peripheral wall and the top wall of the spiral groove of the stud (6); The positioning component (3) comprises: A plurality of push blocks (32) are respectively arranged at one end of each arc-shaped plate (2) away from each other, and each push block (32) is movably arranged on the bearing member (1) in the direction of the through hole (11). As the push block (32) moves in the direction of the through hole (11), it can push one end of the plurality of arc-shaped plates (2) close to the through hole (11) to swing upward to be inserted into the spiral groove of the stud (6); The pushing assembly is arranged on the carrier (1) and is used to push each pushing block (32) to move.

2. A backlash elimination device according to claim 1, characterized in that: The push components include: A pull cable (33) is movably connected to each of the push blocks (32) in sequence; A rotating shaft (34) is rotatably disposed on the bearing member (1), and both ends of the cable (33) are fixed to the rotating shaft (34). The cable (33) rotates with the rotating shaft (34) to drive the cable (33) to be wound around the rotating shaft (34) so ​​as to push each push block (32) to move toward the push block (32); The rotary drive unit (35) is used to realize the rotation and stillness of the rotating shaft (34).

3. A backlash elimination device according to claim 2, characterized in that: The bearing member (1) is fixed with a horizontally arranged limiting shaft (13) on the upper side of the arc opening corresponding to each arc plate (2), and is used to limit the arc plate (2) to swing only along the limiting shaft (13).

4. A backlash elimination device according to claim 2, characterized in that: The rotary drive unit (35) comprises: A worm gear (351) is coaxially fixed to the rotating shaft (34); A worm (352) rotatably disposed on the carrier (1) and meshing with the worm wheel (351); The motor is fixed to the carrier (1) and is used to drive the worm (352) to rotate.

5. The backlash eliminating device according to claim 1, characterized in that: One side of the sliding block (5) is provided with a plurality of limiting grooves (322) along its length direction; A sliding column (151) is movably provided on one side of the bearing member (1) corresponding to each push block (32); The bearing member (1) is provided with an elastic member (152) at a position corresponding to each of the slide posts (151), and is used to push the slide post (151) to move to any limiting groove (322) inserted into the corresponding slide block (5); The end of the slide column (151) is provided with an inclined surface (153) on the side facing away from the through hole (11), which is used for automatically withdrawing from the limiting groove (322) when the push block (32) moves toward the through hole (11).

6. A screw press, comprising a frame (4), a slider (5) vertically slidably connected to the frame (4), and a stud (6) threadedly connected to the slider (5) and rotatably arranged on the frame (4), characterized in that : Also includes a gap elimination device as described in any one of claims 1-5.

7. The screw press according to claim 6, characterized in that: A synchronous shaft (51) is fixed on one side of the slider (5); The frame (4) is rotatably provided with a vertically arranged rotating column (7), a spiral ring groove (71) is provided on the circumference of the rotating column (7), one end of the synchronous shaft (51) is inserted into the spiral ring groove (71), and the vertical movement of the synchronous shaft (51) can drive the rotating column (7) to rotate; One end of the rotating column (7) is connected to a rotary encoder (8).

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