Clamping device and bicycle maintenance device

Abstract

The utility model discloses a clamping device and a bicycle maintenance device, belongs to the field of bicycle maintenance devices, solves the problem that unlocking of an existing bicycle maintenance device is strenuous, and mainly adopts the technical scheme that the clamping device is provided. Comprising a main body, a screw rod, an upper clamping piece, a lower clamping piece, a meshing piece and a locking handle installed on the screw rod, the upper clamping piece is connected to the main body in a sliding mode, the lower clamping piece is installed on the main body, the screw rod is rotationally connected with the upper clamping piece and drives the upper clamping piece to be close to or away from the lower clamping piece, the meshing piece is connected to the main body in a sliding mode, and the locking handle is installed on the screw rod. The main body is provided with a meshing piece, the meshing piece and the main body are relatively fixed in the axis direction of the lead screw, the main body is provided with a driving piece, the driving piece is in threaded connection with the meshing piece, and the driving piece is arranged to drive the meshing piece to be relatively close to or away from the lead screw when the driving piece rotates; and therefore, the meshing piece can be meshed with the screw rod or separated from the screw rod. The utility model is mainly used for locking and releasing the screw rod more quickly and effortlessly.

Description

Technical Field

[0001] The utility model shows a clamping device and a bicycle repairing device, belonging to the technical field of bicycle repairing devices. Background Art

[0002] A bicycle repair device is a structure for lifting and supporting a bicycle during repair, so that a repairman can repair the bicycle more conveniently. For example, US11084162B1 discloses a bicycle repair station, including a bolt and a pressure plate, a threaded portion is formed at the rear end of the bolt, and a thread is provided on the surface of the threaded portion. The pressure plate includes a button, a spring and a clamping portion, and the clamping portion is provided with a convex tooth engaged with the bolt. When the bolt needs to be adjusted, the button is pressed to disengage the clamping portion from the bolt, thereby releasing the engagement of the convex tooth with the bolt to facilitate adjustment of the bolt; and when the fastener completes clamping, the button is released, and the clamping portion contacts the bolt under the action of the spring, and the convex tooth remains engaged with the bolt, thereby achieving the clamping of the bicycle by the fastener.

[0003] In the above-mentioned prior art, the pressure plate is a lever-type switch, which controls the rotation of the engaging part by pressing a button to engage or separate the engaging part and the bolt, thereby realizing the clamping and quick release functions of the fastener. However, after the engaging part is engaged with the bolt, there will be a strong locking force between the two. When pressing the button, a large external force is required to rotate the engaging part and separate it from the bolt, which brings inconvenience to the user's operation and is also prone to jamming, thereby affecting the user experience. Utility Model Content

[0004] The utility model aims to solve the problem that the existing bicycle maintenance device is relatively laborious to unlock, and for this purpose provides a clamping device and a bicycle maintenance device, which make the locking and releasing of the screw rod faster and more labor-saving.

[0005] To solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A clamping device comprises a main body, a screw rod, an upper clamp, a lower clamp, an engaging member and a locking handle installed on the screw rod, the upper clamp is slidably connected to the main body, the lower clamp is installed on the main body, the screw rod is rotatably connected to the upper clamp and drives the upper clamp to approach or move away from the lower clamp, the engaging member is slidably connected to the main body, and the engaging member and the main body are relatively fixed in the axial direction of the screw rod, the main body is provided with a driving member, the driving member is threadedly connected to the engaging member, and is configured to drive the engaging member relatively close to or away from the screw rod when the driving member rotates, so that the engaging member can engage with or disengage from the screw rod.

[0007] The beneficial effects of adopting the utility model are:

[0008] The meshing member described in the utility model is slidably connected to the main body, and a driving member is provided on the main body. The rotation of the driving member is converted into a linear displacement of the meshing member, thereby controlling the meshing member to approach or move away from the screw rod. When the meshing member and the screw rod remain meshed, the driving member rotates to control the meshing member to move away from the screw rod along the radial direction of the screw rod. The disengagement direction of the meshing member can reduce the friction between the meshing member and the screw rod, thereby reducing the external force required for disengagement from the screw rod, making the disengagement of the meshing member from the screw rod faster and more labor-saving, and at the same time, it can also reduce the possibility of the meshing member getting stuck, making the cooperation between the meshing member and the screw rod more stable and reliable; in addition, the rotation of the screw rod drives the upper clamping piece to approach or move away from the lower clamping piece, which can realize stepless adjustment of the upper clamping piece and the lower clamping piece, so that the clamping device can adapt to bicycles with various beam shapes, thereby improving the application range of the clamping device.

[0009] Preferably, the main body is rotatably connected with an unlocking switch and a torsion spring, the unlocking switch is fixed to the driving member, and is used to drive the driving member to rotate relative to the engagement member, and the torsion spring is connected between the main body and the unlocking switch, so that the unlocking switch rotates in the locking direction, and when the unlocking switch rotates in the unlocking direction, the engagement member moves in the direction of disengaging from the screw rod. With the above technical solution, the unlocking switch can make the rotation of the driving member more labor-saving, provide convenience for the user's operation, and help improve the user's experience; in addition, the torsion spring makes the unlocking switch have a tendency to rotate in the locking direction, that is, the engagement member has a movement tendency to engage with the screw rod, and the torsion spring can strengthen the matching strength of the engagement member and the screw rod, improve the locking ability of the engagement member to the screw rod, and then make the upper clamp and the lower clamp clamp the bicycle more stable and reliable, and provide convenience for the user to repair the bicycle; in addition, the torsion spring can also reduce the possibility of the engagement member and the screw rod being separated at will, thereby reducing the possibility of the bicycle falling off, which is conducive to improving the safety of the maintenance process.

[0010] Preferably, a first spring is provided between the main body and the engagement member, and the first spring presses the engagement member tightly and engages the engagement member with the screw rod. With the above technical solution, the first spring can form resistance to the engagement member being separated from the screw rod, further reducing the possibility of the engagement member being separated from the screw rod at will, making the engagement between the engagement member and the screw rod more stable and reliable, and enabling the clamping device to maintain a stable clamping of the bicycle.

[0011] Preferably, it further comprises a sliding member and a second spring, wherein the sliding member is fixed to the upper clamping piece and slidably connected to the main body, and the second spring is connected between the sliding member and the main body so that the sliding member drives the upper clamping piece to move away from the lower clamping piece. With the above technical solution, the second spring enables the sliding member to have a movement tendency away from the lower clamping piece, and when the engaging member is disengaged from the screw rod, the sliding member drives the upper clamping piece away from the lower clamping piece under the action of the second spring, realizing automatic separation of the upper clamping piece from the lower clamping piece, without manually controlling the sliding of the upper clamping piece, making the installation and removal of the bicycle more convenient and quick, and helping to improve maintenance efficiency.

[0012] Preferably, the sliding member includes an upper connecting plate, an intermediate sliding shaft and a lower connecting plate connected in sequence, the upper clip is fixed to the upper connecting plate, the intermediate sliding shaft is connected to the main body in an axial sliding connection along the screw rod, and the second spring is connected to the lower connecting plate. With the above technical solution, the intermediate sliding shaft can guide the sliding member to slide, making the sliding of the sliding member smoother and reducing the possibility of the sliding member getting stuck. At the same time, it can also limit the upper connecting plate from rotating with the screw rod, thereby ensuring that the upper clip and the lower clip can open and close normally; in addition, when the engaging member is disengaged from the screw rod, the second spring acts on the lower connecting plate, and drives the sliding member to move as a whole through the lower connecting plate, thereby controlling the upper clip to move away from the lower clip, realizing the automatic separation of the upper clip and the lower clip, without the need for the user to perform manual operation, providing convenience for the user, and helping to improve the user experience.

[0013] Preferably, a stabilizing ring is installed on the lower connecting plate, and the stabilizing ring is sleeved on the outside of the screw and adapted to the screw so that the stabilizing ring can slide relative to the screw along the screw axis. With the above technical solution, the stabilizing ring can limit the screw, thereby effectively reducing the swing amplitude of the screw, making the rotation of the screw more stable, which is conducive to improving the stability of the overall structure of the clamping device.

[0014] Preferably, the main body is a cylindrical structure, the lower connecting plate and the second spring are arranged in the main body, and the end of the main body away from the lower clamp is provided with a connecting portion for fixing with an external clamp. With the above technical solution, the connecting portion can fix the clamping device to the external clamp, making the connection between the clamping device and the external clamp more convenient and quick, and also making the clamping device remain stable after clamping the bicycle. In addition, the clamping height of the bicycle can be increased by the external clamp, so as to facilitate the maintenance of the bicycle.

[0015] Preferably, the threaded connection between the driving member and the meshing member is self-locking. The above technical solution can improve the connection stability and vibration resistance of the driving member and the meshing member, reduce the possibility of loosening of the driving member and the meshing member due to vibration, and prevent the driving member from rotating at will, thereby making the meshing of the meshing member and the screw rod more stable and reliable.

[0016] The utility model shows a clamping device, including a main body, a screw rod, an upper clamping piece, a lower clamping piece, an engaging piece and a locking handle installed on the screw rod, the upper clamping piece is slidably connected to the main body, the lower clamping piece is installed on the main body, the screw rod is rotatably connected to the upper clamping piece and drives the upper clamping piece to approach or move away from the lower clamping piece, the engaging piece is slidably connected to the main body, and the engaging piece and the main body are relatively fixed in the axial direction of the screw rod, a driving piece is provided on the main body, the driving piece is rotatably connected to the engaging piece, the driving piece is threadedly connected to the main body, and is configured to drive the engaging piece to relatively approach or move away from the screw rod when the driving piece rotates relative to the main body, so that the engaging piece can engage with or disengage from the screw rod.

[0017] The utility model also shows a bicycle maintenance device, comprising a base and a lifting column, and comprising the above-mentioned clamping device, wherein the clamping device is installed on the lifting column.

[0018] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0021] Figure 2 This is a cross-sectional view of the screw rod in the first embodiment of the utility model in a locked state;

[0022] Figure 3 It is a cross-sectional view of the engagement member and the driving member in the first embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the engagement member and the driving member in the first embodiment of the utility model;

[0024] Figure 5 This is a structural schematic diagram of the screw rod in the first embodiment of the utility model in a released state;

[0025] Figure 6 This is a cross-sectional view of the screw rod in the first embodiment of the utility model in a released state;

[0026] Figure 7 It is an enlarged view of the connection between the driving member and the engaging member in the second embodiment of the utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the third embodiment of the present utility model;

[0028] Fig. 9 This is a schematic diagram of the structure of the sleeve and the clamping assembly in the third embodiment of the present utility model.

[0029] Figure numerals: 1 main body, 11 screw rod, 12 upper clamping piece, 13 lower clamping piece, 14 locking handle, 15 connecting part, 2 mounting sleeve, 21 sliding cavity, 22 engaging member, 221 connecting seat, 222 engaging block, 223 convex tooth, 224 avoidance hole, 225 first spring, 23 driving member, 24 unlocking switch, 25 through hole, 241 torsion spring, 3 sliding member, 31 upper connecting plate, 32 intermediate sliding shaft, 33 lower connecting plate, 331 stabilizing ring, 34 second spring, 41 base, 42 column, 421 lifting column, 422 electric drive assembly, 43 sleeve, 431 opening, 44 clamping assembly, 441 mounting seat, 442 upper clamping block, 443 lower clamping block, 444 driving shaft, 445 telescopic spring. DETAILED DESCRIPTION

[0030] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment 1:

[0035] like Figures 1 to 6 As shown, this embodiment shows a clamping device, including a main body 1, a screw rod 11, an upper clamping piece 12, a lower clamping piece 13, a sliding member 3 and a locking handle 14 installed on the screw rod 11, wherein the main body 1 is a cylindrical structure, the sliding member 3 includes an upper connecting plate 31, an intermediate sliding shaft 32 and a lower connecting plate 33 connected in sequence, the lower connecting plate 33 is slidably connected to the inside of the main body 1, one end of the intermediate sliding shaft 32 is fixed to the lower connecting plate 33, and the other end extends along the axial direction of the main body 1 to the outside of the main body 1 and is fixedly connected to the upper connecting plate 31, and the two ends of the screw rod 11 are respectively The locking handle 14 is fixed to the end of the screw rod 11 close to the upper connecting plate 31, and the locking handle 14 rotates to drive the rotation of the screw rod 11. The upper clamp 12 is fixedly installed on the upper connecting plate 31, and the lower clamp 13 is fixedly installed on the end of the main body 1. A clamping space is formed between the upper clamp 12 and the lower clamp 13 to facilitate clamping the crossbeam of the bicycle. The sliding member 3 moves along the axial direction of the main body 1 to control the upper clamp 12 to approach or move away from the lower clamp 13.

[0036] like Figure 2 and Figure 3 As shown, in this embodiment, a meshing member 22 is slidably provided in the main body 1, and a convex tooth 223 meshing with the screw rod 11 is provided at one end of the meshing member 22 facing the screw rod 11. A driving member 23 is provided on the main body 1. The meshing member 22 and the main body 1 are relatively fixed in the axial direction of the screw rod 11, and the sliding direction of the meshing member 22 remains perpendicular to the axial direction of the screw rod 11. The driving member 23 is threadedly connected to the meshing member 22. When the driving member 23 rotates, it drives the meshing member 22 to be relatively close to or away from the screw rod 11, so that the meshing member 22 can remain meshed with or disengaged from the screw rod 11.

[0037] like Figure 1 and Figure 2As shown, when the upper clamping piece 12 and the lower clamping piece 13 clamp the crossbar of the bicycle, the driving member 23 rotates the electric engagement member 22 to move toward the screw rod 11 until the convex teeth 223 engage with the screw rod 11. Through the cooperation of the engagement member 22 and the screw rod 11, the screw rod 11 can be restricted from moving axially at will, thereby achieving axial locking of the screw rod 11 to maintain the clamping force of the upper clamping piece 12 and the lower clamping piece 13. When the spacing between the upper clamping piece 12 and the lower clamping piece 13 needs to be fine-tuned to adapt to the bicycle, When the cross beam of the bicycle is clamped, the screw rod 11 can be driven to rotate by rotating the locking handle 14. Since the screw rod 11 is engaged with the engaging member 22, the screw rod 11 will move along the axial direction of the main body 1 during the rotation. The movement of the screw rod 11 drives the upper connecting plate 31 to move, thereby controlling the upper clamp 12 to approach or move away from the lower clamp 13, so that the clamping space can adapt to bicycles with various cross beam shapes, and the upper clamp 12 and the lower clamp 13 can be adjusted steplessly, which is beneficial to improving the application range of the clamping device.

[0038] like Figure 5 and Figure 6 As shown, when the bicycle needs to be installed between the upper clamp 12 and the lower clamp 13 or the bicycle needs to be removed, the engaging member 22 is controlled by rotating the driving member 23 to move away from the screw rod 11 in the radial direction of the screw rod 11 until the convex teeth 223 of the engaging member 22 are disengaged from the screw rod 11. At this time, the engaging member 22 releases the restriction on the screw rod 11, and the screw rod 11 can move freely in the axial direction of the main body 1. The movement of the screw rod 11 drives the upper connecting plate 31 to move, thereby controlling the upper clamp 12 to approach or move away from the lower clamp 13. Since the screw rod 11 and the main body 1 are not constrained in the axial direction, the adjustment speed of the upper clamp 12 can be accelerated, so as to achieve rapid clamping or disengagement of the bicycle cross beam, which is beneficial to improving maintenance efficiency.

[0039] The driving member 23 described in this embodiment converts the circumferential rotation into the linear displacement of the meshing member 22, thereby controlling the meshing member 22 to approach or move away from the screw rod 11. When the meshing member 22 remains meshed with the screw rod 11, the driving member 23 rotates to control the meshing member 22 to move away from the screw rod 11 in the radial direction of the screw rod 11. The disengagement direction of the meshing member 22 can reduce the friction between the meshing member 22 and the screw rod 11, thereby reducing the external force required to disengage from the screw rod 11, making the disengagement of the meshing member 22 from the screw rod 11 faster and more labor-saving. At the same time, it can also reduce the possibility of the meshing member 22 getting stuck, making the cooperation between the meshing member 22 and the screw rod 11 more stable and reliable.

[0040] like Figure 2 and Figure 3As shown, in order to make the rotation of the driving member 23 more labor-saving and convenient, the end of the driving member 23 away from the meshing member 22 in this embodiment is exposed from the main body 1 and is fixedly connected with an unlocking switch 24. The unlocking switch 24 rotates to drive the driving member 23 to rotate, thereby controlling the meshing member 22 to approach or move away from the screw rod 11. The unlocking switch 24 has two rotation directions, namely an unlocking direction and a locking direction. When the unlocking switch 24 rotates toward the unlocking direction, the driving member 23 controls the meshing member 22 to move away from the screw rod 11, so that the meshing member 22 is disengaged from the screw rod 11; and when the unlocking switch 24 rotates toward the locking direction, the driving member 23 controls the meshing member 22 to approach the screw rod 11, so that the meshing member 22 remains meshed with the screw rod 11. The unlocking switch 24 can increase the circumferential side area of ​​the driving member 23, provide a larger force application surface for the user, and make the rotation of the driving member 23 more labor-saving. It provides convenience for the user's operation and is conducive to improving the user's experience; in addition, a torsion spring 241 is provided between the unlocking switch 24 and the main body 1, and the two ends of the torsion spring 241 act on the unlocking switch 24 and the main body 1 respectively. The torsion spring 241 makes the unlocking switch 24 have a movement tendency to rotate in the locking direction, that is, the engaging member 22 has a movement tendency to maintain engagement with the screw rod 11. When the engaging member 22 is engaged with the screw rod 11, the torsion spring 241 can strengthen the matching strength of the engaging member 22 and the screw rod 11, and improve the locking ability of the engaging member 22 to the screw rod 11, thereby making the upper clamping piece 12 and the lower clamping piece 13 clamp the bicycle more stably and reliably, providing convenience for the user to repair the bicycle; in addition, the torsion spring 241 can also reduce the possibility of the engaging member 22 and the screw rod 11 being separated at will, thereby reducing the possibility of the bicycle falling off, which is conducive to improving the safety of the maintenance process.

[0041] like Figure 3 and Figure 4 As shown, in this embodiment, a mounting sleeve 2 is provided at the end of the main body 1, and the mounting sleeve 2 is fixed in the main body 1. The mounting sleeve 2 is provided with a through hole 25 for the screw rod 11 to pass through and a sliding cavity 21 for the engaging member 22 to slide, wherein the sliding cavity 21 penetrates the mounting sleeve 2 along the radial direction of the mounting sleeve 2, the through hole 25 is kept in communication with the sliding cavity 21, and the axial direction of the through hole 25 is kept perpendicular to the axial direction of the sliding cavity 21, and a first spring 225 is provided between the main body 1 and the engaging member 22, and the two ends of the first spring 225 are respectively against the inner wall of the engaging member 22 and the main body 1, and the first spring 225 makes the engaging member 22 have a movement tendency to move toward the screw rod 11, and when the engaging member 22 is kept in mesh with the screw rod 11, the first spring 225 can form a resistance to the engaging member 22 from disengaging from the screw rod 11, further reducing the possibility of the engaging member 22 from arbitrarily disengaging from the screw rod 11, making the meshing of the engaging member 22 and the screw rod 11 more stable and reliable, so that the clamping device can keep stably clamping the bicycle.

[0042] It should be noted that, in order to make the cooperation between the first spring 225 and the engaging member 22 more stable, the end of the engaging member 22 described in this embodiment is provided with a positioning groove for the first spring 225 to extend into, and the positioning groove can form a circumferential limit for the first spring 225, thereby reducing the possibility of misalignment between the first spring 225 and the engaging member 22, which is beneficial to improving the positioning stability of the first spring 225 and the engaging member 22; in addition, in other embodiments, the end of the sliding cavity 21 away from the driving member 23 can be a closed end, at this time, the two ends of the first spring 225 are respectively lower than the inner walls of the engaging member 22 and the mounting sleeve 2; or in other embodiments, the sliding cavity 21 can also be formed by the inner wall and integrally formed with the main body 1, thereby eliminating the setting of the mounting sleeve 2.

[0043] like Figure 4 As shown, the engaging member 22 in this embodiment includes a connecting seat 221 and an engaging block 222, wherein the connecting seat 221 is a U-shaped structure, the engaging block 222 is inserted into the U-shaped structure and fixedly connected to the connecting seat 221, and a avoidance hole 224 for the screw rod 11 to pass through is provided between the engaging block 222 and the connecting seat 221, and a convex tooth 223 cooperating with the screw rod 11 is provided at one end of the engaging block 222 facing the avoidance hole 224, and the driving member 23 is threadedly connected to the end of the connecting seat 221 to form a thread self-locking, thereby improving the connection stability and vibration resistance of the driving member 23 and the connecting seat 221, reducing the possibility of loosening of the driving member 23 and the connecting seat 221 due to vibration, and avoiding the driving member 23 from rotating at will, thereby making the engagement of the engaging member 22 with the screw rod 11 more stable and reliable.

[0044] like Figure 2 and Figure 6 As shown, in the present embodiment, a second spring 34 is provided in the main body 1, and the second spring 34 is restricted between the lower connecting plate 33 and the main body 1. When the upper clamping piece 12 and the lower clamping piece 13 keep clamping the bicycle cross beam, the second spring 34 is in a compressed state; when the engaging member 22 is disengaged from the screw rod 11, the engaging member 22 releases the axial limit of the screw rod 11, and the second spring 34 acts on the lower connecting plate 33 and controls the lower connecting plate 33 to move upward, and drives the upper connecting plate 31 to move under the action of the intermediate sliding shaft 32, thereby controlling the upper clamping piece 12 to move away from the lower clamping piece 13, thereby realizing the automatic separation of the upper clamping piece 12 and the lower clamping piece 13, without the need for manual operation by the user, providing convenience for the user and helping to improve the user experience; in addition, the intermediate sliding shaft 32 can guide the sliding member 3 to slide, making the sliding member 3 slide more smoothly, reducing the possibility of the sliding member 3 being stuck, and at the same time, it can also limit the upper connecting plate 31 from rotating with the screw rod 11, thereby ensuring that the upper clamping piece 12 and the lower clamping piece 13 can open and close normally.

[0045] In order to keep the screw rod 11 stable, the lower connecting plate 33 in this embodiment is installed with a stabilizing ring 331. The stabilizing ring 331 is sleeved on the outside of the screw rod 11 and adapted to the screw rod 11, so that the stabilizing ring 331 can slide relative to the screw rod 11 along the axis of the screw rod 11. The stabilizing ring 331 can limit the screw rod 11, thereby effectively reducing the shaking amplitude of the screw rod 11, making the rotation of the screw rod 11 more stable, which is beneficial to improving the stability of the overall structure of the clamping device.

[0046] In this embodiment, the end of the main body 1 away from the lower clamp 13 is provided with a connecting portion 15 for fixing to an external clamp. The connecting portion 15 can fix the clamping device to the external clamp, making the connection between the clamping device and the external clamp more convenient and quick, and also can make the clamping device remain stable after clamping the bicycle. In addition, the clamping height of the bicycle can be increased by the external clamp to facilitate the maintenance of the bicycle.

[0047] Embodiment 2:

[0048] like Figure 7 As shown, the main difference between this embodiment and the first embodiment is that: the side of the driving member 23 described in this embodiment away from the engaging member 22 passes through the main body 1 and is threadedly connected to the main body 1, the driving member 23 is rotatably connected to the engaging member 22, and the driving member 23 and the engaging member 22 are relatively fixed in the axial direction of the driving member 23. When the driving member 23 rotates, under the action of the main body 1, the driving member 23 gradually emerges or extends into the main body 1. Since the driving member 23 and the engaging member 22 are relatively fixed in the axial direction of the driving member 23, the driving member 23 drives the engaging member 22 to approach or move away from the screw rod 11, so that the engaging member 22 can engage with or disengage from the screw rod 11. At the same time, the driving member 23 is rotatably connected to the engaging member 22, so the engaging member 22 will not rotate with the driving member 23 during the rotation of the driving member 23.

[0049] The other structures of the second embodiment are the same as those of the first embodiment, and will not be described in detail again.

[0050] Embodiment three:

[0051] like Figure 8 and Fig. 9As shown, this embodiment shows a bicycle maintenance device, including a lifting column 42 and a clamping device, the clamping device is installed on the lifting column 42, the clamping device adopts the clamping device described in the first embodiment or the second embodiment, the lifting column 42 includes a base 41, a column 42, a sleeve 43 and a clamping assembly 44, the column 42 is fixedly installed on the base 41, the column 42 includes a lifting column 421 and an electric drive assembly 422 for driving the lifting column 421 to lift electrically, the sleeve 43 is fixed to the upper end of the column 42, and the sleeve 43 is fixed to the upper end of the column 42. An end away from the column 42 is provided with an opening 431 for the clamping device to extend into the sleeve 43. The clamping assembly 44 includes a mounting seat 441, a driving shaft 444, a compression spring 445, an upper clamping block 442 and a lower clamping block 443. The driving shaft 444 is used to drive the upper clamping block 442 and the lower clamping block 443 to move closer to or away from each other. A notch is provided on the side wall of the sleeve 43. The upper clamping block 442 and the lower clamping block 443 are arranged at the position of the notch so that the upper clamping block 442 and the lower clamping block 443 can pass through the notch to clamp the clamping device.

[0052] During use of this embodiment, the unlocking switch 24 is first used to control the rotation of the driving member 23, thereby driving the engaging member 22 away from the screw rod 11 until the protruding teeth 223 of the engaging member 22 disengage from the screw rod 11. At this time, the engaging member 22 releases the restriction on the screw rod 11, and under the action of the second spring 34, the sliding member 3 slides axially along the main body 1 as a whole, and the sliding member 3 drives the screw rod 11 to move toward the end away from the main body 1. At the same time, the electric upper clamp 12 moves away from the lower clamp 13, thereby increasing the distance between the upper clamp 12 and the lower clamp 13, so as to facilitate placing the crossbeam of the bicycle between the upper clamp 12 and the lower clamp 13.

[0053] Afterwards, the engaging member 22 is kept disengaged from the screw rod 11, and the sliding member 3 is dragged to move the upper clamping piece 12 and the lower clamping piece 13 to approach each other, until both the upper clamping piece 12 and the lower clamping piece 13 are against the bicycle crossbar, and the driving member 23 is controlled to rotate by the unlocking switch 24, thereby driving the engaging member 22 to approach the screw rod 11, until the convex teeth 223 of the engaging member 22 are kept engaged with the screw rod 11, at which time the engaging member 22 forms an axial limit for the screw rod 11, and then the locking handle 14 is rotated to rotate the screw rod 11, and the upper clamping piece 12 is electrically driven to continue to approach the lower clamping piece 13, thereby increasing the clamping force of the upper clamping piece 12 and the lower clamping piece 13 on the bicycle crossbar, making the clamping of the bicycle more stable.

[0054] After the fixing clamp completes clamping the bicycle, the connecting portion 15 of the fixing clamp is extended into the sleeve 43 through the opening 431 of the sleeve 43. After the fixing clamp is adjusted to a suitable position, the driving shaft 444 is controlled to rotate by the locking handle 14, thereby driving the upper clamp block 442 and the lower clamp block 443 to approach each other, so that the upper clamp block 442 and the lower clamp block 443 clamp the fixing clamp, thereby limiting the rotation of the fixing clamp to facilitate maintenance personnel to perform maintenance; when it is necessary to adjust the bicycle body, the upper clamp block 442 and the lower clamp block 443 are controlled to separate by the locking handle, and the upper fixing clamp can rotate freely. After the adjustment is completed, the fixing clamp is clamped again by the upper clamp block 442 and the lower clamp block 443, and maintenance work can be carried out.

[0055] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A clamping device, comprising a main body, a screw rod, an upper clamping piece, a lower clamping piece, an engagement member and a locking handle mounted on the screw rod, wherein the upper clamping piece is slidably connected to the main body, the lower clamping piece is mounted on the main body, the screw rod is rotatably connected to the upper clamping piece and drives the upper clamping piece to approach or move away from the lower clamping piece, wherein: The engaging member is slidably connected to the main body, and the engaging member and the main body are relatively fixed in the axial direction of the screw rod. A driving member is provided on the main body, and the driving member is threadedly connected to the engaging member and is configured to drive the engaging member relatively close to or away from the screw rod when the driving member rotates, so that the engaging member can engage with or disengage from the screw rod.

2. A clamping device according to claim 1, characterized in that: The main body is rotatably connected with an unlocking switch and a torsion spring. The unlocking switch is fixed to the driving member and is used to drive the driving member to rotate relative to the engaging member. The torsion spring is connected between the main body and the unlocking switch to rotate the unlocking switch in the locking direction. When the unlocking switch rotates in the unlocking direction, the engaging member moves in the direction of disengaging from the screw rod.

3. A clamping device according to claim 2, characterized in that: A first spring is provided between the main body and the engaging member, and the first spring presses the engaging member tightly and engages the engaging member with the lead screw.

4. A clamping device according to claim 1, characterized in that: It also includes a sliding member and a second spring. The sliding member is fixed to the upper clamp and slidably connected to the main body. The second spring is connected between the sliding member and the main body so that the sliding member drives the upper clamp to move away from the lower clamp.

5. A clamping device according to claim 4, characterized in that: The sliding member includes an upper connecting plate, an intermediate sliding shaft and a lower connecting plate which are connected in sequence, the upper clamp is fixed to the upper connecting plate, the intermediate sliding shaft is connected to the main body in an axial sliding connection with the screw rod, and the second spring is connected to the lower connecting plate.

6. A clamping device according to claim 5, characterized in that: A stabilizing ring is mounted on the lower connecting plate. The stabilizing ring is sleeved on the outside of the screw rod and is adapted to the screw rod so that the stabilizing ring can slide relative to the screw rod along the screw rod axis.

7. A clamping device according to claim 6, characterized in that: The main body is a cylindrical structure, the lower connecting plate and the second spring are arranged in the main body, and one end of the main body away from the lower clamp is provided with a connecting portion for fixing with an external clamp.

8. A clamping device according to claim 1, characterized in that: The threaded connection between the driving member and the engaging member is self-locking.

9. A clamping device, comprising a main body, a screw rod, an upper clamping piece, a lower clamping piece, an engagement member and a locking handle mounted on the screw rod, wherein the upper clamping piece is slidably connected to the main body, the lower clamping piece is mounted on the main body, the screw rod is rotatably connected to the upper clamping piece and drives the upper clamping piece to approach or move away from the lower clamping piece, wherein: The engaging member is slidably connected to the main body, and the engaging member and the main body are relatively fixed in the axial direction of the screw rod. A driving member is provided on the main body, and the driving member is rotatably connected to the engaging member. The driving member is threadedly connected to the main body and is configured to drive the engaging member relatively close to or away from the screw rod when the driving member rotates relative to the main body, so that the engaging member can engage with or disengage from the screw rod.

10. A bicycle maintenance device, comprising a base and a lifting column, characterized in that: It comprises a clamping device according to any one of claims 1 to 9, wherein the clamping device is installed on the lifting column.

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