A brush handle lifting device
By designing a brush handle lifting device to clamp and lift the stacked brush handles, the problem of scratches caused by friction between brush handles is solved, thus ensuring the surface quality of the brush handles and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TONGCHENG ZHENGYUAN ELECTROMECHANICAL EQUIP CO LTD
- Filing Date
- 2025-09-11
- Publication Date
- 2026-07-14
AI Technical Summary
During the brush handle conveying process, friction between brush handles causes scratches, affecting the product's appearance, which is difficult to avoid effectively with existing technology.
Design a brush handle lifting device that uses a clamping unit and a lifting unit to clamp and lift the stacked brush handles, separating them from the brush handles below to avoid direct contact and friction.
It effectively avoids scratches between brush handles, ensures the surface quality of the brush handles, and improves the automation level and production efficiency of the conveying process.
Smart Images
Figure CN224492818U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material conveying device technology, and more specifically, to a brush handle lifting device. Background Technology
[0002] In the automated production line process of brush handle and brush head splicing, it is usually necessary to continuously convey the brush handle to push it to the brush handle and brush head splicing station to realize the brush head and brush handle splicing work.
[0003] See Chinese Utility Model Patent Application No. 202120490620.3, entitled "An Automatic Stapling and Handle Mounting Device". In this application, before entering the production line, the brush handles are placed in a brush handle storage rack, stacked vertically (as shown in Figure 4 of the aforementioned patent). During operation, the stacked brush handles in the storage rack fall sequentially from the bottom onto the second movable plate of the pushing device. The second movable plate then pushes the brush handles to the brush head assembly station for assembly with the brush head.
[0004] However, during this process, due to the stacking of brush handles, the brush handles waiting to be pushed on the second movable plate are squeezed by the brush handles in the brush handle storage rack above them. When the brush handle waiting to be pushed on the second movable plate is pushed, friction occurs between it and the adjacent brush handle above it, resulting in scratches between them. This causes the appearance of the finished product to fail to meet production requirements and affects its aesthetics. Summary of the Invention
[0005] To address the issue that existing technologies cause scratches and affect aesthetics due to friction between the pushed brush handles and their adjacent brush handles during brush handle conveying, this solution proposes a brush handle lifting device. By lifting the stacked brush handles in the brush handle storage box, the bottom brush handle is separated from the brush handles above it, thus solving the problem in the existing technology.
[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:
[0007] A brush handle lifting device, comprising
[0008] A clamping unit, located on the side of the brush handle storage box, includes a clamping claw and a clamping drive; one end of the clamping claw is mounted on the actuating end of the clamping drive, and the other end faces the brush handles stacked in the brush handle storage box; the clamping claw clamps the brush handles stacked in the brush handle storage box under the drive of the clamping drive; a lifting unit has a lifting drive, the actuating end of which is connected to the clamping unit and is used to drive the clamping unit to move along the stacking direction of the brush handles.
[0009] In this application, when multiple brush handles are stacked in the brush handle storage box, the clamping drive first drives the clamping jaws to move towards the brush handles until the ends of the clamping jaws contact the sides of the stacked brush handles and apply clamping force, thereby stably clamping all the brush handles in the brush handle storage box. Subsequently, the lifting drive is activated, and its actuating end drives the entire clamping unit and the clamped brush handles upwards along the stacking direction of the brush handles, creating a certain gap between the clamped brush handles and the unclamped brush handles below (the bottommost brush handle). In this way, when the external pushing mechanism applies a pushing force to the bottommost brush handle and pushes it to the next station, since the brush handles above have been lifted by the lifting unit, there will be no direct contact or friction between the two, effectively avoiding scratches and ensuring the surface quality of the brush handles. Furthermore, when the conveying device returns after conveying, it will not scratch or damage the bottom of the next brush handle to be conveyed. After the bottom brush handle is pushed out, the lifting unit moves the clamping unit and the remaining brush handles downwards, so that the remaining brush handles are stacked back in the brush handle storage box, waiting for the next lifting and pushing operation. The whole process is highly automated and can stably and efficiently match the working rhythm of the brush handle conveyor line.
[0010] In the brush handle lifting device provided in this application, the clamping unit further includes...
[0011] A support frame, the support frame including a connecting part connected to the lifting unit, and two support arms connected to the connecting part;
[0012] A clamping slide rail, the two ends of which are respectively connected to the corresponding support arm;
[0013] The clamping jaws include two clamping arms, and the clamping arms are movably connected to the clamping slide rail;
[0014] The clamping drive is connected to the support arm to move the clamping ends of the two clamping arms closer or further apart. Placing the clamping slide rail, clamping jaws, and clamping drive on the support frame allows the clamping unit to form a single unit, and the connection between the clamping unit and the lifting unit can be achieved through the connecting part of the support frame.
[0015] In the brush handle lifting device provided in this application, furthermore, two clamping drive members are provided, and one end of each clamping drive member is connected to the corresponding support arm, and the other end is connected to the corresponding clamping arm, so as to drive the clamping ends of the two clamping arms to move closer or further apart via the clamping drive members. This is to clamp the brush handle when the clamping ends are close together, and to lower the brush handle when the clamping ends are far apart.
[0016] In the brush handle lifting device provided in this application, furthermore, each of the two clamping arms has a pad on its opposite side at the clamping end. Each pad includes a shaping block and a washer. The shaping block is detachably connected to the clamping arm, and the washer is connected to the shaping block on the side facing the brush handle, so as to abut against the brush handle via the washer. The shaping block can be configured to have various lengths, so that the gap between the oppositely arranged pads can be adjusted by replacing different sized shaping blocks, thereby enabling the clamping unit to adapt to brush handles of different sizes and shapes.
[0017] In the brush handle lifting device provided in this application, the clamping end of the clamping arm is further provided with a matching hole and a threaded fastening hole that matches the matching hole. The forming block is inserted into the matching hole, and the threaded fastening hole communicates with the matching hole so that the forming block is abutted against the matching hole after the bolt is engaged with the threaded fastening hole. This allows for a detachable connection between the forming block and the clamping arm through insertion and bolt tightening, facilitating the replacement of forming blocks of different sizes.
[0018] In the brush handle lifting device provided in this application, the clamping arm is further provided with a plurality of spaced-apart positioning holes, and at least two of the plurality of positioning holes are connected to the pads. This allows the position of the pads to be reasonably configured according to the size and shape of the brush handle, ensuring stable clamping of the brush handle.
[0019] In the brush handle lifting device provided in this application, the contact surface of the pad that abuts against the brush handle is provided with anti-slip texture. The anti-slip texture increases the friction between the pad and the brush handle, ensuring that the brush handle can be stably clamped and not fall off.
[0020] In the brush handle lifting device provided in this application, the clamping slide rail further includes at least two track rods, which are arranged sequentially at intervals along the extension direction of the clamping arm. The clamping drive member is connected to the area on the clamping arm between the two track rods. The track rod closer to the brush handle is subjected to downward pressure, and the track rod farther from the brush handle is subjected to upward pressure. The two are balanced, so that the clamping slide rail as a whole is not prone to deformation when clamping a large number of brush handles. Even if the clamping arm undergoes some bending deformation when clamping a large number of brush handles, the deformation of the area on the clamping arm between the two track rods will be relatively small, ensuring that the clamping drive member is not easily damaged.
[0021] In the brush handle lifting device provided in this application, the lifting unit further includes a bracket;
[0022] The lifting slide rail is fixedly connected to the bracket.
[0023] The slider is slidably connected to the lifting slide rail;
[0024] A connecting block is fixedly connected to the slider, with one end connected to the clamping unit and the other end connected to the actuating end of the lifting drive. The lifting drive drives the slider or connecting block to slide on the lifting rail, thereby moving the clamping unit along the stacking direction of the brush handle. The lifting rail and slider improve the stability of the lifting unit when it moves the clamping unit.
[0025] In the brush handle lifting device provided in this application, the bracket is further provided with a connecting hole for fitting onto a fixed shaft; a handle is also connected to the connecting hole, and the threaded portion of the handle extends into the connecting hole. Rotating the handle can fasten the bracket to the fixed shaft via the threaded portion. The fixed shaft is connected to a conveying device for conveying the brush handle. This allows for a detachable connection between the brush handle lifting device and the conveying device via the handle, enabling the complete replacement of the brush handle lifting device for overall maintenance. Furthermore, it allows for quick replacement with a spare brush handle lifting device when a malfunction is difficult to resolve, thereby reducing downtime and improving production efficiency.
[0026] The beneficial effects of this application are:
[0027] The brush handle lifting device provided in this application, when multiple brush handles are stacked in the brush handle storage box, first drives the clamping jaws to move towards the brush handles until the ends of the clamping jaws contact the sides of the stacked brush handles and apply clamping force, thereby stably clamping all the brush handles in the storage box. Subsequently, the lifting drive is activated, its actuating end driving the entire clamping unit and the clamped brush handles upwards along the stacking direction, creating a gap between the clamped brush handles and the unclamped brush handles below (the bottommost brush handle). In this way, when the external pushing mechanism applies a pushing force to the bottommost brush handle to the next station, since the brush handles above have been lifted by the lifting unit, there is no direct contact or friction between them, effectively avoiding scratches and ensuring the surface quality of the brush handles. Furthermore, when the conveying device returns after conveying, it will not scratch or damage the bottom of the next brush handle to be conveyed. After the bottom brush handle is pushed out, the lifting unit moves the clamping unit and the remaining brush handles downwards, so that the remaining brush handles are stacked back in the brush handle storage box, waiting for the next lifting and pushing operation. The whole process is highly automated and can stably and efficiently match the working rhythm of the brush handle conveyor line. Attached Figure Description
[0028] Figure 1 This is a three-dimensional structural schematic diagram of the brush handle lifting device of this application;
[0029] Figure 2This is a bottom view of the brush handle lifting device of this application;
[0030] Figure 3 This is a front view of the brush handle lifting device of this application;
[0031] Figure 4 This is a three-dimensional schematic diagram of the clamping arm in the brush handle lifting device of this application;
[0032] Figure 5 This is a three-dimensional structural diagram showing the position of the brush handle lifting device in the overall device.
[0033] Label Explanation:
[0034] 100. Clamping unit; 110. Support frame; 111. Connecting part; 112. Support arm; 120. Clamping slide rail; 121. Track rod; 130. Clamping arm; 140. Clamping drive component; 200. Lifting unit; 210. Lifting drive component; 220. Bracket; 221. Handle; 230. Lifting slide rail; 240. Slider; 250. Connecting block; 300. Pad block; 310. Shaping block; 320. Gasket; 321. Anti-slip texture; 400. Brush handle storage box; 500. Conveying device; 600. Brush handle. Detailed Implementation
[0035] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.
[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal," etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationships; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application according to the specific circumstances.
[0037] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.
[0038] like Figures 1-5 As shown, this application provides a brush handle lifting device, including a clamping unit 100 disposed on the side of a brush handle storage box 400 (the brush handle storage box 400 is prior art, and can be referred to the "brush handle storage rack" feature in patent application number 202120490620.3). The brush handle storage box 400 is disposed on a conveying device 500 for conveying brush handles 600 (the conveying device 500 is prior art, and can be referred to the "second movable plate" feature in patent application number 202120490620.3), clamping... Unit 100 includes a clamping claw and a clamping drive 140. One end of the clamping claw is mounted on the actuating end of the clamping drive 140, and the other end faces the brush handles 600 stacked in the brush handle storage box 400. The clamping claw clamps the brush handles 600 stacked in the brush handle storage box 400 under the drive of the clamping drive 140. Lifting unit 200 has a lifting drive 210. The actuating end of the lifting drive 210 is connected to the clamping unit 100 and is used to drive the clamping unit 100 to move along the stacking direction of the brush handles 600. When multiple brush handles 600 are stacked in the brush handle storage box 400, the clamping drive 140 first drives the clamping claw to move towards the brush handles 600 until the end of the clamping claw contacts the side of the stacked brush handles 600 and applies a clamping force, thereby stably clamping all the brush handles 600 located in the brush handle storage box 400. Subsequently, the lifting drive 210 is activated, its actuating end driving the entire clamping unit 100 and the clamped brush handle 600 upwards along the stacking direction of the brush handles 600, creating a certain gap between the clamped brush handle 600 and the unclamped brush handle 600 below (the bottommost brush handle 600). In this way, when the external pushing mechanism applies a pushing force to the bottommost brush handle 600, pushing it to the next station, since the brush handle 600 above has been lifted by the lifting unit, there will be no direct contact or friction between the two, effectively preventing scratches and ensuring the surface quality of the brush handle 600. Furthermore, when the conveying device returns after conveying, it will not scratch or damage the bottom of the next brush handle to be conveyed. After the bottom brush handle 600 is pushed out, the lifting unit moves the clamping unit and the remaining brush handles 600 downwards, so that the remaining brush handles 600 are stacked back in the brush handle storage box 400, waiting for the next lifting and pushing operation. The whole process is highly automated and can stably and efficiently match the working rhythm of the brush handle 600 conveyor line.
[0039] Furthermore, such as Figure 1 and Figure 2As shown, the clamping unit 100 includes a support frame 110, which includes a connecting part 111 connected to the lifting unit 200 and two support arms 112 connected to the connecting part 111; a clamping slide rail 120, with both ends of the clamping slide rail 120 connected to the corresponding support arms 112; a clamping claw including two clamping arms 130, which are movably connected to the clamping slide rail 120; and a clamping drive 140 connected to the support arms 112 to drive the clamping ends of the two clamping arms 130 to move closer to or further away from each other. By mounting the clamping slide rail 120, clamping jaws, and clamping drive 140 on the support frame 110, the clamping unit 100 can be integrated into a whole. The clamping unit 100 can be connected to the lifting unit 200 through the connecting part 111 of the support frame 110. The clamping drive 140 may include a drive motor and a screw connected to the drive motor. The screw is divided into two parts from the middle to both ends, and the two parts have opposite screw directions. The clamping arm 130 is provided with an internal thread structure that matches the screw, so that when the drive motor drives the screw to rotate, the screw drives the two clamping arms 130 to move closer or further apart, so that the brush handle 600 is clamped when the clamping ends are close together, and the brush handle 600 is lowered when the clamping ends are far apart.
[0040] Furthermore, there may be two clamping drive units 140, with one end of each clamping drive unit 140 connected to the corresponding support arm 112 and the other end connected to the corresponding clamping arm 130. The clamping drive unit 140 drives the clamping ends of the two clamping arms 130 to move closer or further apart, so that the brush handle 600 is clamped when the clamping ends move closer together and the brush handle 600 is lowered when the clamping ends move further apart. The clamping drive unit 140 may be a telescopic cylinder or a telescopic hydraulic cylinder.
[0041] Furthermore, such as Figure 4 As shown, each of the two clamping arms 130 has a pad 300 on its opposite side at the clamping end. Each pad 300 includes a shaping block 310 and a gasket 320. The shaping block 310 is detachably connected to the clamping arm 130, and the gasket 320 is connected to the shaping block 310 on the side facing the brush handle 600, so as to abut against the brush handle 600 via the gasket 320. The shaping block 310 can be configured to have various lengths, so that the gap between the oppositely arranged pads 300 can be adjusted by replacing different sized shaping blocks 310, thereby enabling the clamping unit 100 to adapt to brush handles 600 of different sizes and shapes.
[0042] Furthermore, the clamping end of the clamping arm 130 is provided with a matching hole and a threaded fastening hole that matches the matching hole. The supplementary block 310 is inserted into the matching hole, and the threaded fastening hole communicates with the matching hole so that after the bolt is engaged with the threaded fastening hole, the supplementary block 310 is abutted in the matching hole. This allows for a detachable connection between the supplementary block 310 and the clamping arm 130 through insertion and bolt tightening, making it convenient to replace supplementary blocks 310 of different sizes.
[0043] Furthermore, the clamping arm 130 is provided with a plurality of spaced-apart positioning holes, and at least two of the plurality of positioning holes are connected to pads 300, so that the position of the pads 300 can be reasonably configured according to the size and shape of the brush handle 600, and the brush handle 600 can be stably clamped.
[0044] Furthermore, the pad 320 has anti-slip texture 321 on its contact surface that abuts against the brush handle 600. The anti-slip texture 321 increases the friction between the pad and the brush handle 600, ensuring that the brush handle 600 is stably held and does not fall off.
[0045] Furthermore, such as Figure 2 As shown, the clamping slide rail 120 includes at least two track rods 121, which are arranged sequentially at intervals along the extension direction of the clamping arm 130. The clamping drive member 140 is connected to the area of the clamping arm 130 between the two track rods 121. The track rod 121 closer to the brush handle 600 is subjected to downward pressure, and the track rod farther from the brush handle 600 is subjected to upward pressure. The two are balanced so that the clamping slide rail 120 is not easily deformed when clamping a large number of brush handles 600. Even if the clamping arm 130 undergoes some bending deformation when clamping a large number of brush handles 600, the deformation of the area of the clamping arm 130 between the two track rods 121 will be relatively small, which can ensure that the clamping drive member 140 is not easily damaged.
[0046] Furthermore, such as Figure 1 and Figure 3 As shown, the lifting unit 200 also includes a bracket 220; a lifting slide rail 230 fixedly connected to the bracket 220; a slider 240 slidably connected to the lifting slide rail 230; and a connecting block 250 fixedly connected to the slider 240, one end of which is connected to the clamping unit 100, and the other end is connected to the actuating end of the lifting drive member 210. The lifting drive member 210 drives the slider 240 or the connecting block 250 to slide on the lifting slide rail 230, thereby moving the clamping unit 100 along the stacking direction of the brush handle 600. The lifting slide rail 230 and slider 240 improve the stability of the lifting unit 200 when moving the clamping unit 100. The lifting drive member 210 can be a telescopic cylinder or a telescopic hydraulic cylinder.
[0047] Furthermore, the bracket 220 has a connecting hole for fitting onto the fixed shaft; a handle 221 is also connected to the connecting hole, and the threaded part of the handle 221 extends into the connecting hole. Rotating the handle 221 can fasten the bracket 220 to the fixed shaft via the threaded part. The fixed shaft is connected to the conveying device 500 of the conveying brush handle 600, so that the brush handle 600 lifting device and the conveying device 500 can be detachably connected through the handle 221. This allows for the complete replacement of the brush handle 600 lifting device for overall maintenance, and enables the quick replacement of the spare brush handle 600 lifting device when a fault occurs and is difficult to resolve, thereby reducing downtime and improving production efficiency.
[0048] The brush handle 600 lifting device of this application has the following technical advantages:
[0049] 1. The brush handle 600 lifting device of this application lifts the uppermost brush handle 600 among the stacked brush handles 600 in the brush handle storage box 400, so that the uppermost brush handle 600 is separated from the bottommost brush handle 600. This ensures that when the bottommost brush handle 600 is pushed to the next station by the transmission device, there will be no friction between the bottommost brush handle 600 and the brush handle 600 above it, thus ensuring that no scratches are generated on the surface of the brush handle 600.
[0050] 2. The shaping block 310 in the brush handle 600 lifting device of this application can be configured to have multiple length dimensions, so that the gap between the relatively arranged pads 300 can be adjusted by replacing the shaping block 310 of different sizes, thereby enabling the clamping unit 100 to adapt to brush handles 600 of different sizes and shapes.
[0051] 3. The brush handle 600 lifting device of this application realizes the detachable connection between the brush handle 600 lifting device and the conveying device 500 through the handle 221, realizes the overall replacement of the brush handle 600 lifting device for overall maintenance, and can quickly replace the brush handle 600 lifting device with a spare brush handle 600 lifting device when the brush handle 600 lifting device malfunctions and is difficult to troubleshoot, so as to reduce downtime and improve production efficiency.
[0052] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited to this. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A brush handle lifting device, characterized in that, include A clamping unit (100) is disposed on the side of the brush handle storage box (400) and includes a clamping claw and a clamping drive (140); one end of the clamping claw is mounted on the actuating end of the clamping drive (140), and the other end faces the brush handles (600) stacked in the brush handle storage box (400); the clamping claw is clamped on the brush handles (600) stacked in the brush handle storage box (400) under the drive of the clamping drive (140); The lifting unit (200) has a lifting drive (210), the actuating end of which is connected to the clamping unit (100) to drive the clamping unit (100) to move along the stacking direction of the brush handle (600).
2. The brush handle lifting device according to claim 1, characterized in that, The clamping unit (100) includes The support frame (110) includes a connecting part (111) connected to the lifting unit (200) and two support arms (112) connected to the connecting part (111). A clamping slide rail (120) is provided, and both ends of the clamping slide rail (120) are respectively connected to the corresponding support arm (112); The clamping jaws include two clamping arms (130), and the clamping arms (130) are movably connected to the clamping slide rail (120); The clamping drive (140) is connected to the support arm (112) to drive the clamping ends of the two clamping arms (130) to move closer or further apart.
3. The brush handle lifting device according to claim 2, characterized in that, Two clamping drive members (140) are provided, and one end of each clamping drive member (140) is connected to the corresponding support arm (112), and the other end is connected to the corresponding clamping arm (130), so that the clamping ends of the two clamping arms (130) can be driven to move closer or further apart via the clamping drive member (140).
4. The brush handle lifting device according to claim 2, characterized in that, Each of the two clamping arms (130) has a pad (300) on one of the opposite sides of the clamping end. The pad includes a shaping block (310) and a gasket (320). The shaping block (310) is detachably connected to the clamping arm (130). The gasket (320) is connected to the side of the shaping block (310) facing the brush handle (600) so as to abut against the brush handle (600) via the gasket (320).
5. A brush handle lifting device according to claim 4, characterized in that, The clamping end of the clamping arm (130) is provided with a matching hole and a threaded fastening hole that matches the matching hole. The supplementary block (310) is inserted into the matching hole. The threaded fastening hole communicates with the matching hole so that the supplementary block (310) abuts against the matching hole after the bolt is engaged with the threaded fastening hole.
6. A brush handle lifting device according to claim 5, characterized in that, The clamping arm (130) has a plurality of spaced-apart matching holes, and at least two of the plurality of matching holes are connected to the pad (300).
7. A brush handle lifting device according to claim 4, characterized in that, The pad (320) has anti-slip texture (321) on the contact surface for abutting the brush handle (600).
8. A brush handle lifting device according to claim 3, characterized in that, The clamping slide rail (120) includes at least two track rods (121), and the track rods (121) are arranged sequentially at intervals along the extension direction of the clamping arm (130). The clamping drive (140) is connected to the clamping arm (130) in the area between the two track rods (121).
9. A brush handle lifting device according to claim 1, characterized in that, The lifting unit (200) includes Bracket (220); The lifting slide rail (230) is fixedly connected to the bracket (220); The slider (240) is slidably connected to the lifting slide rail (230); The connecting block (250) is fixedly connected to the slider (240), with one end connected to the clamping unit (100) and the other end connected to the actuating end of the lifting drive (210). The lifting drive (210) drives the slider (240) or the connecting block (250) to slide on the lifting slide rail (230), thereby causing the clamping unit (100) to move along the stacking direction of the brush handle (600).
10. A brush handle lifting device according to claim 9, characterized in that, The bracket (220) has a connecting hole for fitting onto the fixed shaft; a handle (221) is also connected to the connecting hole, and the threaded part of the handle (221) extends into the connecting hole. Rotating the handle (221) can fasten the bracket (220) onto the fixed shaft via the threaded part.