Conveying guide device

Abstract

This application provides a conveying and guiding device, including a frame, a conveying component, and a guiding assembly. The guiding assembly includes a support base, a trapezoidal screw, a first nut, a second nut, and two oppositely arranged guide plates. The support base is located on opposite sides of the frame. The trapezoidal screw is mounted on the support base and positioned above the conveying component. The trapezoidal screw has a first thread and a second thread, with opposite rotation directions. The first nut and the second nut are respectively screwed onto the first thread and the second thread. The two guide plates are respectively fitted onto the first nut and the second nut. The trapezoidal screw can rotate relative to the support base to allow the two guide plates to move synchronously away from or towards each other. The conveying and guiding device provided by this application enables symmetrical, synchronous, and rapid adjustment of the two guide plates, thereby shortening the time required to adjust the distance between the two guide plates, improving the switching time between different workpieces, and increasing production efficiency.

Description

Technical Field

[0001] This application relates to the field of workpiece conveying technology, and in particular to a conveying and guiding device. Background Technology

[0002] In workpiece conveying mechanisms, a pair of spaced-apart guide plates are positioned above the conveyor belt. Driven by the conveyor belt, the workpiece passes between the two guide plates, which guide the workpiece, improving the accuracy and stability of the conveying process. However, when applied to workpieces of varying widths, related technologies require adjusting the drive guide plates individually to increase or decrease the distance between them. This adjustment process is cumbersome, and the mechanism for adjusting the guide plate spacing is also complex, reducing production efficiency. Utility Model Content

[0003] In view of this, this application provides a conveying and guiding device to solve the above problems.

[0004] This application provides a conveying and guiding device, including a frame, a conveying component, and a guiding assembly. The conveying component is mounted on the frame. The guiding assembly includes a support base, a trapezoidal screw, a first nut, a second nut, and two oppositely arranged guide plates. The support base is located on opposite sides of the frame. The trapezoidal screw is mounted on the support base along a conveying direction perpendicular to the conveying component and is positioned above the conveying component. The trapezoidal screw has a first thread and a second thread, with opposite rotation directions. The first nut and the second nut are screwed onto the first thread and the second thread, respectively. The two guide plates are respectively sleeved on the first nut and the second nut. The trapezoidal screw can rotate relative to the support base to allow the two guide plates to move away from or towards each other synchronously.

[0005] In some embodiments, the guide assembly also includes a guide shaft, the axis of which is parallel to that of the trapezoidal screw. The guide shaft is mounted on a support base and passes through two guide plates, with the guide shaft slidably connected to the two guide plates.

[0006] In some embodiments, the guide assembly further includes two guide sleeves, which are respectively fixed to two guide plates. The guide shaft passes through the two guide sleeves and is slidably connected to the two guide plates. One guide sleeve and its corresponding first nut are spaced apart along the conveying direction, and the other guide sleeve and its corresponding second nut are spaced apart along the conveying direction.

[0007] In some embodiments, the axis of the guide shaft and the axis of the trapezoidal screw are at the same height on the frame, and the first thread and the second thread are symmetrically arranged.

[0008] In some embodiments, the conveying guide device further includes two guide components, each guide component including a guide plate, the end of each guide plate being rotatably connected to the guide plate, the guide plate being inclined relative to the connected guide plate, and the gap between the two guide plates forming a conveying channel, the opening of the conveying channel gradually decreasing along the conveying direction.

[0009] In some embodiments, the guide assembly further includes a rotating shaft, two locking fasteners, and an adjusting limit plate. The guide plate and the guide plate are rotatably connected by the rotating shaft. The adjusting limit plate has a positioning hole and a waist hole. One locking fastener fixes the adjusting limit plate to the top surface of the guide plate through the positioning hole, and the other locking fastener fixes the adjusting limit plate to the top surface of the guide plate through the waist hole.

[0010] In some embodiments, each guide plate may also be detachably provided with a stop plate, with two stop plates located between the two guide plates and the stop plates disposed near the bottom of the guide plates.

[0011] In some embodiments, the stop plate includes a baffle and an extension block connected to the baffle, the stop plate being detachably connected to the guide plate via the extension block.

[0012] In some embodiments, the support base includes two support blocks, which are respectively disposed on both sides of the frame. The trapezoidal screw is rotatably connected to the two support blocks. The conveying guide device also includes a fastening assembly, which includes a fastening block and fasteners mounted on the fastening block. The fastening block is fixed to one side of a support block and has an opening. One end of the trapezoidal screw passes through the opening. When it is necessary to fix the trapezoidal screw, the fastener locks one end of the trapezoidal screw onto the fastening block.

[0013] In some embodiments, the conveying guide device further includes an operating element mounted on the end of the trapezoidal screw away from the fastening block, the trapezoidal screw passing through another support block and connected to the operating element, and a portion of the operating element being movably embedded in the support block.

[0014] The conveying and guiding device provided in this application uses an externally driven trapezoidal screw to rotate. The first and second threads on the trapezoidal screw are threadedly connected to two guide plates via a first and a second nut, respectively. This causes the two guide plates to move synchronously in opposite directions along the axis of the trapezoidal screw, allowing them to move closer or further apart to adjust the distance between them and thus meet the needs of different workpieces. Simultaneously, the first and second nuts enable the threaded connection between the guide plates and the trapezoidal screw, and also improve the ease of mounting the trapezoidal screw and guide plates on the frame. In this application, by driving the trapezoidal screw, symmetrical and synchronous rapid adjustment of the two guide plates can be achieved simultaneously, thereby shortening the time for adjusting the distance between the two guide plates, improving the switching time between different workpieces, and increasing production efficiency. Using trapezoidal screws with different threads, the rotation of the trapezoidal screw drives the movement of the guide plates. The above implementation method is simple in structure and easy to operate. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a conveying and guiding device provided in this application.

[0016] Figure 2 for Figure 1 A partial structural schematic diagram of the conveying and guiding device shown.

[0017] Figure 3 for Figure 2 The exploded view of the conveyor guide device shown.

[0018] Figure 4 for Figure 2 The diagram shows a conveyor guide device in which two guide plates are far apart from each other.

[0019] Explanation of main component symbols

[0020] Conveying and guiding device: 100, Frame: 10, Base frame: 11, Operating table: 12, Conveying component: 20, Guiding assembly: 30, Support base: 31, Support block: 311, Through hole: 3111, Guide shaft: 32, Trapezoidal screw: 33, First thread: 331, Second thread: 332, Guide plate: 34, Mounting hole: 341, Inserting hole: 342, First nut component: 35, Nut: 351, First mounting plate: 352, Second nut component: 36, Guide sleeve: 37, Second mounting... Plate: 38, Guide assembly: 40, Guide plate: 41, Rotating hole: 411, Rotating shaft: 42, Locking fastener: 43, Adjusting limit piece: 44, Positioning hole: 441, Waist hole: 442, Conveying channel: 45, Stop plate: 50, Baffle: 51, Extension block: 52, Connector: 53, Fastening assembly: 60, Fastening block: 61, Opening: 611, Fastener: 62, Operating component: 71, Gasket: 72, First direction: X, Second direction: Y, Third direction: Z, Workpiece: 200.

[0021] The following detailed implementation methods will be combined with the above appendix. Figure 1-4 Further explanation of this application. Detailed Implementation

[0022] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0023] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0025] To further illustrate the technical means and effects adopted by this application in achieving its intended purpose, the following detailed description of this application is provided in conjunction with the accompanying drawings and embodiments.

[0026] Please see Figure 1 and Figure 2This application provides a conveying and guiding device 100, which includes a frame 10, a conveying component 20, and a guiding assembly 30. The conveying component 20 is mounted on the frame 10. The frame 10 includes a base frame 11 and an operating table 12 mounted on the base frame 11. The conveying component 20 is mounted on the operating table 12. The guiding assembly 30 includes a support base 31, a guide shaft 32, a trapezoidal screw 33, two oppositely arranged guide plates 34, a first nut 35, and a second nut 36. The support base 31 is located on opposite sides of the operating table 12 of the frame 10. The guide shaft 32 and the trapezoidal screw 33 are both arranged along a conveying direction perpendicular to the conveying component 20 and are both mounted on the operating table 12 of the support base 31. The axes of the guide shaft 32 and the trapezoidal screw 33 are parallel. The guide shaft 32 and the trapezoidal screw 33 are located above the conveying component 20. The two guide plates 34 are slidably connected to the guide shaft 32. The trapezoidal screw 33 is provided with a first thread 331 and a second thread 332. The rotation directions of the first thread 331 and the second thread 332 are opposite. A first nut 35 and a second nut 36 are respectively screwed onto the first thread 331 and the second thread 332, and two guide plates 34 are respectively sleeved on the first nut 35 and the second nut 36. One guide plate 34 is threadedly connected to the first thread 331 through the first nut 35, and the other guide plate 34 is threadedly connected to the second thread 332 through the second nut 36. When the trapezoidal screw 33 is rotated, the two guide plates 34 move away from or towards each other synchronously. Figure 4 .

[0027] The conveying and guiding device 100 provided in this application uses an external force to drive a trapezoidal screw 33 to rotate. The first thread 331 and the second thread 332 on the trapezoidal screw 33 are respectively threadedly connected to two guide plates 34 via a first nut 35 and a second nut 36, causing the two guide plates 34 to move synchronously in opposite directions along the axis of the trapezoidal screw 33, thereby causing the two guide plates 34 to move away from or closer to each other. Figure 4 The spacing between the two guide plates 34 is adjusted to meet the needs of different workpieces 200. In this application, by driving the trapezoidal screw 33, the two guide plates 34 can be simultaneously and synchronously adjusted symmetrically and rapidly, thereby shortening the time for adjusting the spacing between the two guide plates 34, improving the switching time between different workpieces 200, and increasing production efficiency. Using trapezoidal screws 33 with different threads, the guide plates 34 are moved by the rotation of the trapezoidal screw 33. The above implementation method is simple in structure and easy to operate.

[0028] See Figure 2 and Figure 3The first nut 35 is threadedly connected to the trapezoidal screw 33 via the first thread 331, and the second nut 36 is threadedly connected to the trapezoidal screw 33 via the second thread 332. Simultaneously, the arrangement of the first nut 35 and the second nut 36 enables the threaded connection between the guide plate 34 and the trapezoidal screw 33, and the nut arrangement also improves the convenience of installing the trapezoidal screw 33 and the guide plate 34 on the operating table 12.

[0029] In some embodiments, the guide shaft 32 passes through two guide plates 34, and the guide shaft 32 is slidably connected to the two guide plates 34. The guide shaft 32 facilitates the smooth movement of the two guide plates 34 along the guide shaft 32, reduces the force exerted on the conveyor 20 during the movement of the guide plates 34, and improves the service life of the conveyor 20.

[0030] In some embodiments, the conveyor 20 can be a conveyor belt or a conveyor roller conveyor. This embodiment takes a conveyor belt as an example. Rollers are provided at both ends of the operating table 12, and a driving component (such as a motor) is provided on the operating table 12. The driving component drives the rollers to rotate, thereby driving the conveyor belt to rotate.

[0031] Combination Figure 3 In some embodiments, the first thread 331 and the second thread 332 are spaced apart on the trapezoidal screw 33 so that the two guide plates 34 remain spaced apart when the trapezoidal screw 33 is driven to rotate. In this application, both the guide shaft 32 and the trapezoidal screw 33 are positioned close to the top surface of the guide plate 34 to facilitate the passage of the workpiece 200 between the guide shaft 32 and the trapezoidal screw 33 and the conveyor 20, reducing interference between the guide shaft 32 and the trapezoidal screw 33 and workpieces 200 of different heights. In some embodiments, the trapezoidal screw 33 and the guide shaft 32 are arranged sequentially along the conveying direction.

[0032] In some embodiments, the first nut 35 includes a nut 351 and a first mounting plate 352. The outer side wall of one end of the nut 351 extends outward to form the first mounting plate 352. The first nut 35 is fixed to the guide plate 34 by the first mounting plate 352. The guide plate 34 has a mounting hole 341 that is adapted to the nut 351. The nut 351 is fitted into the mounting hole 341, and the first mounting plate 352 is fixed to the guide plate 34 by a locking member (such as a bolt). The structure of the second nut 36 is the same as that of the first nut 35. The first mounting plate 352 is located on the surface of one guide plate 34 facing the other guide plate 34.

[0033] In some embodiments, the guide assembly 30 further includes two guide sleeves 37, which are respectively fixed to two guide plates 34. The guide shaft 32 passes through the two guide sleeves 37 and is slidably connected to the guide plates 34. One guide sleeve 37 and a first nut 35 located on the same guide plate 34 are spaced apart along the conveying direction, and the other guide sleeve 37 and a second nut 36 located on the same guide plate 34 are spaced apart along the conveying direction. The conveying direction is a first direction X, and the central axis of the trapezoidal screw 33 and the guide shaft 32 is arranged along a second direction Y, with the first direction X perpendicular to the second direction Y. In some embodiments, one end of the guide sleeve 37 extends outward to form a second mounting plate 38, and the guide sleeve 37 is fixed to the guide plate 34 by the second mounting plate 38.

[0034] In some embodiments, the axis of the guide shaft 32 and the axis of the trapezoidal screw 33 are at the same height on the frame 10. Compared to the operating table 12, the axes of the guide shaft 32 and the trapezoidal screw 33 are at the same height in the third direction Z, providing greater stability when adjusting the relative movement of the two guide plates 34 via the trapezoidal screw 33. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The first thread 331 and the second thread 332 are symmetrically arranged in the second direction Y, so that when the trapezoidal screw 33 rotates, it facilitates the equidistant movement of the two guide plates 34, enabling rapid adjustment of the distance between the two guide plates 34. The pitch of the first thread 331 and the second thread 332 is the same. In some embodiments, the trapezoidal screw 33 may be a trapezoidal screw 33.

[0035] See Figure 2 and Figure 3 In some embodiments, the conveying and guiding device 100 further includes two guiding components 40, each including a guide plate 41. The end of each guide plate 34 is rotatably connected to the guide plate 41. The guide plate 41 is inclined relative to the connected guide plate 34. The gap between the two guide plates 41 forms a conveying channel 45, the opening of which gradually decreases along the conveying direction. The two movably connected guide plates 41 enable rapid adjustment of the guide for the workpiece 200 to accommodate workpieces 200 passing at different angles.

[0036] In some embodiments, the guide assembly 40 further includes a rotating shaft 42, two locking fasteners 43, and an adjusting limiting piece 44. The guide plate 41 and the guide plate 34 are rotatably connected by the rotating shaft 42. The adjusting limiting piece 44 has a positioning hole 441 and a waist hole 442. One locking fastener 43 fixes the adjusting limiting piece 44 to the top surface of the guide plate 41 through the positioning hole 441, and the other locking fastener 43 fixes the adjusting limiting piece 44 to the top surface of the guide plate 34 through the waist hole 442. A rotating hole 411 is provided on the guide plate 41 along the third direction Z. The rotating shaft 42 passes through the rotating hole 411, and both ends of the rotating shaft 42 are connected to the guide plate 34 to enable the guide plate 41 to rotate relative to the guide plate 34 with the center line of the rotating shaft 42 as the center. The adjusting limiting piece 44 is provided between the guide plate 41 and the guide plate 34, and the rotation angle of the guide plate 41 relative to the guide plate 34 is adjusted by the positioning hole 441 and the waist hole 442 to maintain a suitable angle between the two guide plates 41. In some embodiments, the locking element 43 may be a bolt.

[0037] See Figure 2 and Figure 3 In some embodiments, each guide plate 34 is also detachably provided with a stop plate 50, with two stop plates 50 located between the two guide plates 34 and positioned near the bottom of the guide plates 34. The stop plates 50 are used to block the workpiece 200 on the conveyor 20, so that the workpiece 200 is confined between the two guide plates 34. When automatic positioning of the workpiece 200 is required, the two stop plates 50 are installed on the guide plates 34. During the conveying process of the conveyor 20, the two stop plates 50 block the workpiece 200 between the two guide plates 34, so that the workpiece 200 can be accurately grasped by an external robotic arm, so that the workpiece 200 can be accurately grasped from the conveyor 20 for subsequent assembly.

[0038] In some embodiments, the stop plate 50 includes a baffle 51 and an extension block 52 connected to the baffle 51. The stop plate 50 is detachably connected to the guide plate 34 via the extension block 52. The baffle 51 is located between the two guide plates 34 to block the workpiece 200. A locking hole 342 is also provided on the guide plate 34, and the extension block 52 is located in the locking hole 342 to be mounted on the guide plate 34. The locking hole 342 is located at the top of the guide plate 34, and the baffle 51 is positioned close to the trapezoidal screw 33 to achieve quick installation and removal of the stop plate 50 while minimizing the structure of the conveying guide device 100, without requiring additional components. The extension block 52 is detachably mounted to the guide plate 34 via a connector 53, which can be a bolt.

[0039] In some embodiments, the support base 31 includes two support blocks 311, which are respectively disposed on both sides of the operating table 12 in the frame 10. The trapezoidal screw 33 is rotatably connected to the two support blocks 311, and each support block 311 has a through hole 3111. The conveying and guiding device 100 also includes a fastening assembly 60, which includes a fastening block 61 and a fastener 62 mounted on the fastening block 61. The fastening block 61 is fixed to one side of a support block 311 and has an opening 611. One end of the trapezoidal screw 33 passes through the through hole 3111 and the opening 611 in sequence. When it is necessary to fix the trapezoidal screw 33, the fastener 62 locks one end of the trapezoidal screw 33 onto the fastening block 61. When it is necessary to rotate the trapezoidal screw 33, the fastener 62 is opened, thereby allowing the trapezoidal screw 33 to be movably connected to the fastening block 61. When the trapezoidal screw 33 drives the guide plate 34 to move to the preset position, the end of the trapezoidal screw 33 is fixed to the fastening block 61 by locking the fastener 62.

[0040] In some embodiments, a fastener 62 passes through a fastening block 61, and an opening 611 extends along a third direction (Z) through one end of the fastening block 62. The size of the opening 611 is adjusted by the fastener 62 to restrict the rotation of the trapezoidal screw 33. In other embodiments, the fastener 62 can be a bolt, which abuts against the end of the trapezoidal screw 33 to restrict the rotation of the trapezoidal screw 33.

[0041] See Figure 2 and Figure 3 In some embodiments, the conveying and guiding device 100 further includes an operating member 71, which is mounted on the end of the trapezoidal screw 33 away from the fastening block 61. The trapezoidal screw 33 passes through a through hole 3111 in another support block 311 and is connected to the operating member 71. Part of the operating member 71 is movably embedded in the support block 311. External force is applied to the trapezoidal screw 33 through the operating member 71, causing the trapezoidal screw 33 to rotate and drive the two guide plates 34 to move along the second direction Y. The operating member 71 can be a rotary handle, which is partially embedded in a support block 311. A gasket 72 is also provided between the rotary handle and the trapezoidal screw 33 to improve the tightness of the connection between the rotary handle and the trapezoidal screw 33. The rotating handle of this application is located near the support block 311. The two ends of the trapezoidal screw 33 are respectively located on the rotating handle and the fastening block 61. When rotating the trapezoidal screw 33, it is not necessary to set the two ends of the trapezoidal screw 33 outward along the second direction Y of the frame 10, which reduces the structural space for setting the guide assembly 30.

[0042] The conveying and guiding device 100 provided in this application uses an external force to drive a trapezoidal screw 33 to rotate. The first thread 331 and the second thread 332 on the trapezoidal screw 33 are threadedly connected to two guide plates 34 via a first nut 35 and a second nut 36, respectively. This causes the two guide plates 34 to move synchronously in opposite directions along the axis of the trapezoidal screw 33, allowing them to move closer or further apart to adjust the distance between them and thus meet the needs of different workpieces 200. Simultaneously, the first nut 35 and the second nut 36 enable the threaded connection between the guide plates 34 and the trapezoidal screw 33, and also improve the convenience of installing the trapezoidal screw 33 and guide plates 34 on the frame 10. In this application, by driving the trapezoidal screw 33, the two guide plates 34 can be symmetrically and synchronously adjusted quickly, thereby shortening the time for adjusting the distance between the two guide plates 34, improving the switching time between different workpieces 200, and increasing production efficiency. By using a trapezoidal screw 33 with different threads, the guide plate 34 is moved by the rotation of the trapezoidal screw 33. The above implementation method has a simple structure and is easy to operate.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A conveying and guiding device, characterized in that, include: frame; A conveyor is mounted on the frame; The guiding assembly includes a support base, a trapezoidal screw, a first nut, a second nut, and two opposing guide plates. The support base is disposed on opposite sides of the frame. The trapezoidal screw is disposed along a direction perpendicular to the conveying component and mounted on the support base, with the trapezoidal screw positioned above the conveying component. The trapezoidal screw has a first thread and a second thread, with the first thread and the second thread rotating in opposite directions. The first nut and the second nut are respectively screwed onto the first thread and the second thread. The two guide plates are respectively sleeved on the first nut and the second nut. The trapezoidal screw can rotate relative to the support base to allow the two guide plates to move synchronously away from or towards each other.

2. The conveying and guiding device as described in claim 1, characterized in that, The guide assembly also includes a guide shaft, which is arranged parallel to the axis of the trapezoidal screw. The guide shaft is mounted on the support base and passes through the two guide plates, and is slidably connected to the two guide plates.

3. The conveying and guiding device as described in claim 2, characterized in that, The guiding assembly further includes two guide sleeves, which are respectively fixed to two guide plates. The guide shaft passes through the two guide sleeves and is slidably connected to the two guide plates. One guide sleeve and its corresponding first nut are spaced apart along the conveying direction, and the other guide sleeve and its corresponding second nut are spaced apart along the conveying direction.

4. The conveying and guiding device as described in claim 2, characterized in that, The axis of the guide shaft and the axis of the trapezoidal screw are at the same height on the frame, and the first thread and the second thread are symmetrically arranged.

5. The conveying and guiding device as described in claim 1, characterized in that, The conveying and guiding device further includes two guiding components, each of which includes a guide plate. The end of each guide plate is rotatably connected to the guide plate. The guide plate is inclined relative to the connected guide plate. The gap between the two guide plates forms a conveying channel. Along the conveying direction, the opening of the conveying channel gradually decreases.

6. The conveying and guiding device as described in claim 5, characterized in that, The guide assembly also includes a rotating shaft, two locking fasteners, and an adjusting limit plate. The guide plate and the guide plate are rotatably connected by the rotating shaft. The adjusting limit plate has a positioning hole and a waist hole. One of the locking fasteners fixes the adjusting limit plate to the top surface of the guide plate through the positioning hole, and the other locking fastener fixes the adjusting limit plate to the top surface of the guide plate through the waist hole.

7. The conveying and guiding device as described in claim 1, characterized in that, Each of the guide plates may also be detachably provided with a stop plate, and two stop plates are located between the two guide plates, with the stop plates disposed near the bottom of the guide plates.

8. The conveying and guiding device as described in claim 7, characterized in that, The stop plate includes a baffle and an extension block connected to the baffle, and the stop plate is detachably connected to the guide plate via the extension block.

9. The conveying and guiding device as described in claim 1, characterized in that, The support base includes two support blocks, which are respectively disposed on both sides of the frame. The trapezoidal screw is rotatably connected to the two support blocks. The conveying guide device also includes a fastening assembly, which includes a fastening block and a fastener mounted on the fastening block. The fastening block is fixed to one side of one of the support blocks. The fastening block has an opening, and one end of the trapezoidal screw passes through the opening. When it is necessary to fix the trapezoidal screw, the fastener locks one end of the trapezoidal screw onto the fastening block.

10. The conveying and guiding device as described in claim 9, characterized in that, The conveying and guiding device also includes an operating element, which is installed at the end of the trapezoidal screw away from the fastening block. The trapezoidal screw passes through another support block and is connected to the operating element. Part of the operating element is movably embedded in the support block.

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