Brake device, lifting device and lifting table

Abstract

The invention provides a brake device, a lifting device and a lifting table. The rotating piece is rotatably arranged in the mounting seat, and a mounting hole for the transmission rod to penetrate through is formed in the rotating piece; the brake component is rotatably arranged in the mounting seat, and the rotating piece is in linkage connection with the brake component; the rotating piece rotates in the first direction, and the brake component can abut against the bottom face and the side face of the mounting base and generate friction force, so that the brake device has a friction brake state for braking the transmission rod; the rotating piece rotates in the second direction, and the brake device is in a released state. Compared with a brake device which conducts braking only through a torsion spring in the prior art, the brake device is better in braking effect.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting devices, and in particular to a brake device, a lifting device and a lifting table. Background Art

[0002] An electric lift table includes a lift table leg and a drive unit. The lift table leg is equipped with a linear drive assembly that drives the lift table leg up and down. The drive unit is connected to the linear drive assembly to move the lift table leg up and down, thereby adjusting the height of the lift table leg. To improve the lifting speed and efficiency, the transmission rod of the linear drive assembly tends to use a large-lead screw. However, the large-lead screw thread has a large slope, resulting in a relatively reduced friction force and a deviation in the self-locking force. If the drive unit suddenly loses power or stops working, if the lift table is carrying a large load, the lift table leg is prone to uncontrolled descent, affecting the stability of the electric lift table.

[0003] To prevent this from happening, a brake device is typically used in conjunction with the table legs to provide reliable braking. Typically, the brake device's core elastic component is a torsion spring, which is designed to clamp the linear drive assembly's transmission rod in the braking state, generating a force that prevents the transmission rod from rotating, thereby slowing the table legs' descent.

[0004] However, when the electric lift table is carrying heavy objects or is lifted and lowered frequently or at high speed, the clamping force of the torsion spring may be insufficient to provide continuous and effective braking, resulting in poor braking effect on the transmission rod, causing the legs of the lift table to move unexpectedly under the gravity of the heavy objects, affecting the stability of the lift table during use. Summary of the Invention

[0005] The main purpose of the present invention is to provide a brake device, a lifting device and a lifting table. Compared with a brake device that only uses a torsion spring for braking, the brake device has a better braking effect.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a brake device, which includes: a mounting seat; a rotating member rotatably arranged in the mounting seat, and the rotating member is provided with a mounting hole for a transmission rod to pass through; a brake component rotatably arranged in the mounting seat, and the rotating member is linked to the brake component; the rotating member rotates along a first direction, and the brake component can abut against the bottom and side surfaces of the mounting seat and generate friction, so that the brake device has a friction braking state for braking the transmission rod; the rotating member rotates along a second direction, and the brake device is in a released state.

[0007] Furthermore, the brake component includes a first friction member, which is located at one end of the axial direction of the rotating member. The rotating member and the first friction member are pressed together. When the rotating member rotates along the first direction, the end of the first friction member away from the rotating member abuts against the bottom surface of the mounting seat and generates friction.

[0008] Furthermore, a first inclined surface is provided at one end of the rotating member facing the first friction member, and a second inclined surface is provided at one end of the first friction member facing the rotating member. When the rotating member rotates along the first direction, the first inclined surface abuts and presses against the second inclined surface to drive the first friction member and the rotating member to rotate synchronously and generate friction between the first friction member and the bottom surface of the mounting seat.

[0009] Furthermore, a first stop surface connected to the first inclined surface is provided at one end of the rotating member facing the first friction member, and a second stop surface connected to the second inclined surface is provided at one end of the first friction member facing the rotating member. When the rotating member rotates along the second direction, the first stop surface abuts and presses against the second stop surface to drive the first friction member and the rotating member to rotate synchronously.

[0010] Furthermore, the first inclined surface is parallel to the second inclined surface, the first stop surface is parallel to the second stop surface, the angle between the second inclined surface and the reference surface is A, the angle between the second stop surface and the reference surface is B, A<B, and the reference surface is a plane perpendicular to the rotation axis of the first friction member; or, the first stop surface, the first inclined surface, the second stop surface, and the second inclined surface are each provided in plurality, and the plurality of first inclined surfaces and the plurality of first stop surfaces are alternately arranged in sequence along the circumference of the rotating member; the plurality of second inclined surfaces and the plurality of second stop surfaces are alternately arranged in sequence along the circumference of the first friction member; or, the first stop surface and the second stop surface are both inclined surfaces; or, the first stop surface and the second stop surface are both planes parallel to the rotation axis of the first friction member.

[0011] Furthermore, a first annular protrusion is provided at one end of the rotating part facing the first friction part, and the end surface of the first annular protrusion facing the first friction part forms a first inclined surface and a first stop surface; a second annular protrusion is provided at one end of the first friction part facing the rotating part, and the end surface of the second annular protrusion facing the rotating part forms a second inclined surface and a second stop surface.

[0012] Furthermore, the brake component also includes a second friction member, which is swingably arranged on the first friction member, and the rotating member is linked to the second friction member so that the second friction member has a first position expanding outward and a second position contracting inward; when the rotating member rotates along the first direction, the second friction member is in the first position, the second friction member abuts against the side of the mounting seat and generates friction; when the rotating member rotates along the second direction, the second friction member is in the second position, and the second friction member is separated from the side of the mounting seat; or, when the second friction member is in the second position, the friction force between the second friction member and the side of the mounting seat is less than the friction force between the second friction member and the side of the mounting seat when the second friction member is in the first position.

[0013] Furthermore, the second friction member is pivotally connected to the first friction member, and a clamping groove is provided on the inner side of the second friction member; a boss is provided on the end of the rotating member facing the first friction member, and the boss has a clamping position that cooperates with the clamping groove and a disengagement position that disengages from the clamping groove; when the boss is in the clamping position, the second friction member is in the first position, and when the boss is in the disengagement position, the second friction member is in the second position.

[0014] Furthermore, there are multiple second friction members, and the multiple second friction members are arranged at the periphery of the first friction member at intervals along the circumference of the first friction member; there are multiple bosses, and the multiple bosses are arranged at the periphery of the rotating member at intervals along the circumference of the rotating member, and the multiple bosses are arranged in a one-to-one correspondence with the multiple second friction members; and / or, the second friction member is an arc-shaped plate, the outer surface of the arc-shaped plate is an arc-shaped surface protruding outward, and the contour of the part of the arc-shaped surface that can abut against the side of the mounting seat is adapted to the contour of the side.

[0015] Furthermore, the mounting seat includes an upper shell and a lower shell that are detachably connected, the rotating part is located in the upper shell, and the brake component is located in the lower shell; and / or, the brake device also includes an elastic part, which is fixed in the mounting seat and arranged on the outer periphery of the rotating part. The elastic part and the rotating part have an interference fit. Under external force, the elastic part enables the rotating part to have a clamping state of clamping the transmission rod and a loosening state of loosening the transmission rod. When the rotating part rotates in a first direction, the rotating part is in a clamping state; when the rotating part rotates in a second direction, the rotating part is in a loosening state.

[0016] According to another aspect of the present invention, the present invention provides a lifting device, which includes: a driving member; a lifting component, in which a linear driving assembly for driving the lifting component to lift and lower is arranged, the linear driving assembly includes a transmission rod, and the driving member is connected to the transmission rod to rotate the transmission rod; the above-mentioned brake device, the mounting seat of the brake device is arranged on one of the end portions of the lifting component along the lifting direction, and one end of the transmission rod passes through the mounting hole of the mounting seat and the rotating member of the brake device along the lifting direction of the lifting component and extends into the lifting component.

[0017] According to another aspect of the present invention, the present invention provides a lifting table, which includes a table top and the above-mentioned lifting device, and the lifting device is connected to the table top.

[0018] By applying the technical solution of the present invention, when the brake device is in the friction braking state, the brake member can abut against the bottom and side surfaces of the mounting seat and generate friction, thus ensuring safe braking of the transmission rod. In the prior art, braking of the transmission rod is typically achieved by a torsion spring. The torsion spring is designed to clamp the transmission rod in the braking state, generating a force that prevents the transmission rod from rotating and slows its rotational speed. In other words, the transmission rod is only subjected to the clamping force from the torsion spring. In the present solution, however, when the brake device is in the friction braking state, the brake member can be simultaneously subjected to friction from the bottom surface of the mounting seat and friction from the side surfaces of the mounting seat. This dual frictional force provides a greater deceleration effect, reducing the rotational speed of the brake member more rapidly, thereby reducing the rotational speed of the rotating member and the transmission rod more rapidly. Compared to the prior art method of relying solely on the clamping force of the torsion spring to slow the rotational speed of the transmission rod, the brake device of the present solution provides a superior braking effect on the transmission rod when in the friction braking state.

[0019] Specifically, if the driving member that drives the transmission rod to rotate suddenly loses power or stops working, and the transmission rod rotates in an unexpected direction, that is, when the transmission rod rotates in a first direction, friction is generated between the brake member and the bottom and side surfaces of the mounting seat. Under the combined action of the friction between the brake member and the bottom surface and the friction between the brake member and the side surfaces, the rotation speed of the brake member decreases, thereby reducing the rotation speed of the rotating member and the rotation speed of the transmission rod, thereby improving the braking effect on the transmission rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 A cross-sectional view of a brake device provided in Embodiment 1 of the present invention is shown;

[0022] Figure 2 A schematic diagram of the exploded structure of the brake device provided in the first embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram of the exploded structure of the brake device provided in the first embodiment of the present invention from a second viewing angle is shown;

[0024] Figure 4 A schematic diagram of the force structure of the second inclined surface and the second stop surface provided in the first embodiment of the present invention is shown;

[0025] Figure 5 A schematic structural diagram of a rotating member provided in the first embodiment of the present invention is shown;

[0026] Figure 6 It shows a schematic structural diagram of a first friction member provided by the first embodiment of the present invention;

[0027] Figure 7 A top view of a partial structure of a brake device provided in the first embodiment of the present invention is shown;

[0028] Figure 8 A schematic diagram of the force structure of the second inclined surface and the second stop surface provided in the second embodiment of the present invention is shown;

[0029] Figure 9 A top view of a partial structure of a brake device provided in a third embodiment of the present invention is shown;

[0030] Figure 10 FIG2 shows a structural diagram of a lifting device provided in a fourth embodiment of the present invention;

[0031] Figure 11 A cross-sectional view of the lifting device provided in the fourth embodiment of the present invention is shown in a retracted state;

[0032] Figure 12 A cross-sectional view of the lifting device provided by the fourth embodiment of the present invention is shown in an extended state.

[0033] The above drawings include the following reference numerals:

[0034] 10. Mounting seat; 101. Bottom surface; 102. Side surface; 11. Upper shell; 1101. Fixing groove; 12. Lower shell;

[0035] 21. Rotating member; 2100. Mounting hole; 2101. First inclined surface; 2102. First stop surface; 211. First annular protrusion; 2111. First tip; 2112. First recess; 212. Boss;

[0036] 213. First annular portion; 214. Second annular portion; 215. Connecting ribs;

[0037] 22. Elastic member; 221. Bending protrusion;

[0038] 30. Brake components;

[0039] 31, first friction member; 3101, second inclined surface; 3102, second stop surface; 311, second annular protrusion; 3111, second tip; 3112, second recess;

[0040] 32. Second friction member; 3201. Snap-fit groove;

[0041] 40. Driving member; 50. Lifting member; 51. Outer cylinder; 52. Middle cylinder; 53. Inner cylinder;

[0042] 60. Linear drive assembly; 61. Transmission rod; 611. Anti-rotation block;

[0043] 621, first support cylinder; 622, first nut seat;

[0044] 631, second support cylinder; 632, second nut seat; 633, externally threaded tube; 6331, anti-rotation groove;

[0045] 70. Protective cover. DETAILED DESCRIPTION

[0046] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] In the prior art, usually, the core elastic component of the brake device is a torsion spring, which is designed to clamp the transmission rod of the linear drive assembly in the braking state to generate a force to prevent the transmission rod from rotating, thereby slowing down the descending speed of the lift table legs. However, when the electric lift table is carrying too heavy a weight, lifting and lowering frequently or at high speed, or when the driving component that drives the transmission rod to rotate suddenly loses power or stops working, it may happen that the clamping force of the torsion spring is insufficient to provide continuous and effective braking, resulting in poor braking effect on the transmission rod, causing the lift table legs to move unexpectedly under the action of the gravity of the loaded weight, affecting the stability of the lift table during use. To this end, the applicant provides the following brake device, which is described in detail as follows:

[0048] like Figures 1 to 5As shown, a first embodiment of the present invention provides a brake device, comprising a mounting base 10, a rotating member 21, and a brake member 30. The rotating member 21 is rotatably disposed within the mounting base 10 and is provided with a mounting hole 2100 through which the transmission rod 61 passes. The brake member 30 is rotatably disposed within the mounting base 10, and the rotating member 21 and the brake member 30 are interlockingly connected. When the rotating member 21 rotates in a first direction, the brake member 30 abuts against the bottom surface 101 and side surface 102 of the mounting base 10, generating friction, thereby placing the brake device in a friction braking state, braking the transmission rod 61. When the rotating member 21 rotates in a second direction, the brake device is in a released state.

[0049] By applying the technical solution of the present invention, when the brake device is in a friction braking state, the brake member 30 can abut against the bottom surface 101 and the side surface 102 of the mounting seat 10 and generate friction. That is, the brake member 30 can be simultaneously subjected to the friction force from the bottom surface 101 of the mounting seat 10 and the friction force from the side surface 102 of the mounting seat 10. Under the action of the double friction force, the brake member 30 has a better deceleration effect, the rotation speed of the brake member 30 decreases faster, and the rotation speed of the rotating member 21 decreases faster, which in turn causes the rotation speed of the transmission rod 61 to decrease faster. Compared with the prior art method of relying solely on the clamping force of the torsion spring to slow down the rotation speed of the transmission rod, the brake device of this solution has a better braking effect on the transmission rod 61 when it is in a friction braking state.

[0050] Specifically, if the driving member that drives the transmission rod 61 to rotate suddenly loses power or stops working, and the transmission rod 61 rotates in an unexpected direction, that is, when the transmission rod 61 rotates in the first direction, friction is generated between the brake component 30 and the bottom surface 101 and the side surface 102 of the mounting seat 10. Under the combined action of the friction between the brake component 30 and the bottom surface 101 and the friction between the brake component 30 and the side surface 102, the rotation speed of the brake component 30 decreases, thereby reducing the rotation speed of the rotating component 21 and the rotation speed of the transmission rod 61, thereby improving the braking effect on the transmission rod 61.

[0051] It can be understood that when the transmission rod 61 rotates normally, that is, when the transmission rod 61 rotates in the second direction, the brake device is in a released state, and the friction between the brake component 30 and the mounting seat 10 is small; when the brake device is in a released state, the friction between the brake component 30 and the mounting seat 10 is much smaller than the total friction between the brake component 30 and the mounting seat 10 when the brake device is in a friction braking state.

[0052] In certain applications, multiple lifting devices are required to synchronously drive a component up and down, and each lifting device is equipped with a corresponding brake device. When the transmission rod 61 rotates normally in the second direction, the brake device is released, ensuring that friction exists between each brake member 30 and the corresponding mounting seat 10. This friction acts as a buffer against the rotation of the transmission rod 61. When the transmission rods 61 of multiple lifting devices rotate in the second direction, the presence of this friction ensures that the order in which the multiple lifting devices operate is as consistent as possible, reducing any shaking or trembling during product operation.

[0053] Take the application of the brake device in the lifting table legs of an electric lifting table as an example: when the table legs are under abnormally large pressure, the table legs may drop uncontrollably. At this time, the transmission rod 61 will drive the rotating part 21 to rotate in an unexpected first direction, and the brake component 30 will contact the bottom surface 101 and the side surface 102 of the mounting seat 10 and generate friction. This friction can provide a certain resistance for the rotating part 21 to continue to rotate in the first direction, thereby slowing down the rotation speed of the transmission rod 61 or even preventing the rotation of the transmission rod 61. When the brake device is in this working mode, it is defined as a friction braking state.

[0054] The release state is another working mode of the brake device, which is opposite to the friction braking state.

[0055] For example, when the motor drives the transmission rod 61 to rotate in the second direction to enable normal operation of the table leg, the brake member 30 separates from the side surface 102 of the mounting base 10. At this time, friction exists between the brake member 30 and the bottom surface 101 of the mounting base 10 (the brake member 30 is always in contact with the bottom surface 101 of the mounting base 10 due to its own weight. During the rotation of the brake member 30, there is at least one friction force generated by the brake member 30's own weight between the brake member 30 and the bottom surface 101 of the mounting base 10). However, this friction is very small and insufficient to significantly affect the normal rotation of the rotating member 21. In other words, the transmission rod 61 can rotate smoothly. When the brake device is in this operating mode, it is defined as a released state. In other words, when the brake device is in the released state, the driving force of the driving member used to drive the transmission rod 61 to rotate and the weight of the product itself (e.g., the table top and frame) are greater than the total friction between the brake member 30 and the mounting base 10 when the transmission rod 61 rotates in the second direction, allowing the product to operate normally.

[0056] In addition, if you want to improve the friction braking effect of the brake device, you can appropriately increase the friction coefficient between the brake component 30 and the bottom surface 101 or the friction coefficient between the brake component 30 and the side surface 102, including but not limited to the selection of the contact part material and the design of the contact surface roughness.

[0057] In an embodiment of the present scheme, the mounting hole 2100 is a polygonal hole, and the contour of the portion of the transmission rod 61 that passes through the mounting hole 2100 is adapted to the contour of the mounting hole 2100, so that the rotating part 21 and the transmission rod 61 can be prevented from rotating; and the transmission rod 61 and the rotating part 21 can be limited in the axial direction of the transmission rod 61 by setting a retaining spring.

[0058] like Figures 1 to 3 As shown, the brake member 30 includes a first friction member 31 located at one end of the axial direction of the rotating member 21. The rotating member 21 and the first friction member 31 are pressed against each other. When the rotating member 21 rotates in the first direction, the end of the first friction member 31 away from the rotating member 21 contacts the bottom surface 101 of the mounting seat 10, generating friction. This arrangement ensures that if the rotating member 21 unexpectedly begins to rotate in the first direction, the first friction member 31 will be pushed by the rotating member 21, and the end of the first friction member 31 away from the rotating member 21 will contact the bottom surface 101 of the mounting seat 10, generating friction.

[0059] It can be understood that in this solution, when the brake component 30 rotates along the first direction, in addition to the friction force generated by the weight of the brake component 30 itself, there is also pressure applied by the rotating component 21 to the first friction component 31 toward the bottom surface 101 along the direction of gravity between the first friction component 31 and the bottom surface of the mounting seat 10, which will also generate a certain amount of friction.

[0060] In the embodiment of this solution, the first friction member 31 is an annular plate structure, is coaxially arranged with the rotating member 21, and can allow the transmission rod 61 to pass through the first friction member 31.

[0061] Furthermore, a first inclined surface 2101 is provided on the end of the rotating member 21 facing the first friction member 31, and a second inclined surface 3101 is provided on the end of the first friction member 31 facing the rotating member 21. When the rotating member 21 rotates in the first direction, the first inclined surface 2101 abuts and presses against the second inclined surface 3101. Because the transmission rod 61 passes through the first friction member 31, this arrangement enables the rotating member 21 to drive the first friction member 31 to rotate synchronously with the rotating member 21, generating friction between the first friction member 31 and the bottom surface 101 of the mounting base 10. The arrangement of the first inclined surface 2101 and the second inclined surface 3101 provides a simple structure and facilitates processing.

[0062] Moreover, the first inclined surface 2101 is parallel to the second inclined surface 3101 . This arrangement can increase the contact area between the first inclined surface 2101 and the second inclined surface 3101 , improve the stability of force transmission, and improve the stability of the rotation process of the first friction member 31 .

[0063] Furthermore, the first inclined surface 2101 extends along the circumference of the rotating member 21, and the second inclined surface 3101 extends along the circumference of the first friction member 31. This configuration can more effectively transmit the rotational force of the rotating member 21 to the first friction member 31.

[0064] like Figures 2 to 4 As shown, it can be understood that when the first rotating member 21 rotates in the first direction, after the first inclined surface 2101 and the second inclined surface 3101 abut and press against each other, the rotating member 21 applies a force FA perpendicular to the second inclined surface 3101 to the first friction member 31. This force FA is decomposed into a force F1Y directed toward the bottom surface 101. This force F1Y increases the pressure of the first friction member 31 on the bottom surface 101 and generates a certain amount of friction between the first friction member 31 and the bottom surface 101. At the same time, because the first friction member 31 is mounted on the transmission rod 61, the force FA is also decomposed into a rotational force F1X that drives the first friction member 31 to rotate horizontally in the first direction. Under the action of the rotational force F1X, the first friction member 31 rotates synchronously with the rotating member 21 in the first direction.

[0065] Specifically, the friction force between the first friction member 31 and the bottom surface 101 when the first friction member 31 rotates along the first direction can be adjusted by designing the angle between the second inclined surface 3101 and the reference plane, wherein the reference plane is a plane perpendicular to the rotation axis of the first friction member 31.

[0066] The included angle A between the second inclined surface 3101 and the reference surface is an acute angle, and the smaller the included angle is, the greater the friction force between the first friction member 31 and the bottom surface 101 is.

[0067] Furthermore, the end of the rotating member 21 facing the first friction member 31 is further provided with a first stop surface 2102 connected to the first inclined surface 2101. The end of the first friction member 31 facing the rotating member 21 is further provided with a second stop surface 3102 connected to the second inclined surface 3101. When the rotating member 21 rotates in the second direction, the first stop surface 2102 abuts and presses against the second stop surface 3102, thereby driving the first friction member 31 to rotate synchronously with the rotating member 21. The provision of the first stop surface 2102 and the second stop surface 3102 provides a simple structure and facilitates processing.

[0068] It can be understood that the interaction between the first inclined surface 2101 and the second inclined surface 3101, combined with the interaction between the first stop surface 2102 and the second stop surface 3102, enables linkage between the first rotating member 21 and the first friction member 31, that is, when the first rotating member 21 rotates in the first direction, the first friction member 31 can rotate synchronously with the first rotating member 21, and when the first rotating member 21 rotates in the second direction, the first friction member 31 can rotate synchronously with the first rotating member 21.

[0069] In this embodiment, the first stop surface 2102 is parallel to the second stop surface 3102. This arrangement can increase the contact area between the first stop surface 2102 and the second stop surface 3102, improve the stability of force transmission, and improve the stability of the first friction member 31 during rotation.

[0070] It is understood that when the first rotating member 21 rotates in the second direction, the first stop surface 2102 abuts and presses against the second stop surface 3102, and the rotating member 21 applies a force FB perpendicular to the second stop surface 3102 to the first friction member 31. Since the first friction member 31 is sleeved on the transmission rod 61, this force can drive the first friction member 31 to rotate.

[0071] This solution can design whether friction is generated between the first friction part 31 and the bottom surface 101 when the first friction part 31 rotates along the second direction, or design the magnitude of the friction between the first friction part 31 and the bottom surface 101 when the first friction part 31 rotates along the second direction by designing the angle between the second stop surface 3102 and the reference surface.

[0072] Specifically, when the included angle between the second stop surface 3102 and the reference surface is an acute angle, and the larger the included angle between the second stop surface 3102 and the reference surface is, the smaller the friction force between the first friction member 31 and the bottom surface 101 is.

[0073] In this embodiment, the angle between the second inclined surface 3101 and the reference surface is A, and the angle between the second stop surface 3102 and the reference surface is B, where A<B<90°. This arrangement allows the first friction member 31 to rotate in the first direction when the rotating member 21 drives the first friction member 31, generating a greater friction force between the first friction member 31 and the bottom surface 101, thereby enhancing the braking effect of the brake member 30 on the transmission rod 61. When the rotating member 21 drives the first friction member 31 to rotate in the second direction, a relatively smaller friction force is generated between the first friction member 31 and the bottom surface 101.

[0074] Specifically, when a lift table has multiple lift legs, each equipped with a brake device, during normal operation of the lift table, when the multiple lift legs synchronously adjust the height of the lift table, the rotating member 21 drives the corresponding first friction member 31 to rotate in the second direction, and each first friction member 31 exerts a small friction force against the bottom surface 101 of the corresponding mounting base 10. This arrangement allows the first friction member 31 to provide a buffering effect for the rotation of the corresponding transmission rod 61, thereby allowing the multiple lift legs to rise and fall synchronously as much as possible, adjusting the relative rotation speeds between the different lift legs, reducing the shaking and jitter of the lift table caused by speed differences, and improving the stability and smoothness of the lift table's operation.

[0075] Preferably, the angle A between the second inclined surface 3101 and the reference surface is an acute angle and is less than 45°; the angle B between the second stop surface 3102 and the reference surface is an acute angle and is greater than 45°.

[0076] Furthermore, in an embodiment of the present solution, the angle A between the second inclined surface 3101 and the reference surface is an acute angle and is less than 30°; the angle B between the second stop surface 3102 and the reference surface is an acute angle and is set between 60° and 90°.

[0077] In the embodiment of this solution, a plurality of first inclined surfaces 2101 and a plurality of first stop surfaces 2102 are provided, and the plurality of first inclined surfaces 2101 and the plurality of first stop surfaces 2102 are alternately distributed along the circumference of the rotating member 21 .

[0078] There are multiple second inclined surfaces 3101 and multiple second stop surfaces 3102, the number of second inclined surfaces 3101 is the same as the number of first inclined surfaces 2101, the number of second stop surfaces 3102 is the same as the number of first stop surfaces 2102, and the multiple second inclined surfaces 3101 and the multiple second stop surfaces 3102 are alternately distributed along the circumference of the first friction member 31.

[0079] Specifically, a first annular protrusion 211 is provided on one end of the rotating member 21 facing the first friction member 31. The end surface of the first annular protrusion 211 facing the first friction member 31 forms a first inclined surface 2101 and a first stop surface 2102. This arrangement can improve the convenience of processing the first inclined surface 2101 and the first stop surface 2102.

[0080] Furthermore, a second annular protrusion 311 is provided on one end of the first friction member 31 facing the rotating member 21. The end surface of the second annular protrusion 311 facing the rotating member 21 forms a second inclined surface 3101 and a second stop surface 3102. This configuration can improve the convenience of processing the second inclined surface 3101 and the second stop surface 3102.

[0081] like Figures 4 to 6 As shown, in this solution, along the first direction, the interconnected first stop surfaces 2102 and the first inclined surfaces 2101 have an included angle therebetween, and the portion between the adjacent first stop surfaces 2102 and the first inclined surfaces 2101 forms a first tip 2111, and a first recess 2112 is formed between the two adjacent first tips 2111; along the first direction, part of the side surface of the first recess 2112 is the first inclined surface 2101 of one of the first tips 2111, and the other part of the side surface is the first stop surface 2102 of the other first tip 2111.

[0082] Along the first direction, the interconnected second inclined surfaces 3101 and the second stop surface 3102 have an included angle, and the portion between adjacent second inclined surfaces 3101 and second stop surfaces 3102 forms a second tip 3111, and a second recess 3112 is formed between two adjacent second tips 3111; along the first direction, part of the side surface of the second recess 3112 is the second stop surface 3102 of one of the second tips 3111, and the other part of the side surface is the second inclined surface 3101 of the other second tip 3111.

[0083] like Figure 4 As shown, each second recess 3112 is provided with a corresponding first tip 2111. Along the axis of the first friction member 31, the minimum gap between each first tip 2111 and the corresponding second recess 3112 is d1, and the maximum height of each second tip 3111 is d2, where d1 < d2. This arrangement ensures that the first tip 2111 will not fall out of the corresponding second recess 3112 during rotation of the rotating member 21. This technology is prior art and will not be elaborated upon here.

[0084] like Figure 2 、 Figure 3 and Figure 7 As shown, in the embodiment of the present scheme, the brake member 30 also includes a second friction member 32, which is swingably arranged on the first friction member 31, and the rotating member 21 is linked to the second friction member 32 so that the second friction member 32 has a first position expanding outward and a second position contracting inward; when the rotating member 21 rotates along the first direction, the second friction member 32 is in the first position, and the second friction member 32 abuts against the side surface 102 of the mounting seat 10 and generates friction.

[0085] In the embodiment of this solution, the second friction member 32 is an arc-shaped plate, the outer surface of the arc-shaped plate is an outwardly convex arc surface, and the contour of the portion of the arc-shaped surface that can abut against the side surface 102 of the mounting seat 10 is adapted to the contour of the side surface 102 .

[0086] Among them, this solution can design the contact area between the arc plate and the side surface 102 of the mounting seat 10 by designing the size of the arc plate, and finally design the friction force between the arc plate and the side surface 102 when the arc plate is in the first position.

[0087] In the embodiment of this solution, when the rotating member 21 rotates along the second direction and the second friction member 32 is in the second position, the second friction member 32 is separated from the side surface 102 of the mounting seat 10, that is, there is no friction between the second friction member 32 and the side surface 102 of the mounting seat 10.

[0088] Specifically, the second friction member 32 is pivotally connected to the first friction member 31, and a snap-fitting groove 3201 is provided on the inner side of the second friction member 32; a boss 212 is provided on the end of the rotating member 21 facing the first friction member 31, and the boss 212 has a snap-fitting position a that cooperates with the snap-fitting groove 3201 and a disengagement position b that disengages from the snap-fitting groove 3201; when the boss 212 is in the snap-fitting position, the second friction member 32 is in the first position, and when the boss 212 is in the disengagement position, the second friction member 32 is in the second position.

[0089] It can be understood that in the embodiment of the present scheme, the rotating member 21 does not directly drive the first friction member 31 to rotate at the initial stage of rotation, but there is a rotation gap between the second rotating member 21 and the first friction member 31. Due to the existence of the rotation gap, the rotating member 21 can undergo a slight relative rotation with the first friction member 31, so that the boss 212 has a snap-fit position a that cooperates with the snap-fit groove 3201 and a disengagement position b that disengages from the snap-fit groove 3201.

[0090] In the embodiment of this solution, when the boss 212 is in the disengaged position, the boss 212 is completely separated from the second friction member 32. This arrangement prevents the second friction member 32 from being subjected to the force from the boss 212, and the second friction member 32 is separated from the side surface 102 of the mounting seat 10.

[0091] Specifically, along the circumference of the rotating part 21, when each first stop surface 2102 abuts against the corresponding second stop surface 3102, there is a rotation gap between each first inclined surface 2101 and the corresponding second inclined surface 3101; when each first inclined surface 2101 abuts against the corresponding second inclined surface 3101, there is a rotation gap between each first stop surface 2102 and the corresponding second stop surface 3102.

[0092] like Figure 2 、 Figure 3 and Figure 7As shown, there are multiple second friction members 32, and the multiple second friction members 32 are arranged at the periphery of the first friction member 31 at intervals along the circumference of the first friction member 31. There are multiple bosses 212, and the multiple bosses 212 are arranged at the periphery of the rotating member 21 at intervals along the circumference of the rotating member 21. The multiple bosses 212 are arranged in a one-to-one correspondence with the multiple second friction members 32.

[0093] This arrangement enables multiple second friction members 32 to form multi-point contact with the side surface 102 of the mounting base 10, increasing the friction area and the number of contact points between the second friction members 32 and the side surface 102 of the mounting base 10. When the rotating member 21 rotates in the first direction, the multiple second friction members 32 are driven to the first position and contact the side surface 102, generating greater friction and enhancing the braking effect on the transmission rod 61. Furthermore, compared to a single second friction member 32, this multi-point contact braking mode can more evenly distribute braking force and improve braking stability.

[0094] In the embodiment of this solution, three second friction members 32 are specifically provided, and three protruding columns 212 are provided.

[0095] like Figures 1 to 3 As shown, further, the mounting base 10 includes a detachably connected upper shell 11 and a lower shell 12, the rotating member 21 is located in the upper shell 11, and the brake component 30 is located in the lower shell 12. Such an arrangement facilitates the assembly of the brake device.

[0096] It is understood that after the upper shell 11 and the lower shell 12 are fastened together, a mounting seat 10 with a cylindrical cavity is formed. The first friction member 31, the cylindrical cavity, and the rotating member 21 are all coaxial. The end of the first friction member 31 away from the rotating member 21 can abut against the bottom surface 101 of the lower shell 12; the second friction member 32 can abut against the side surface 102 of the lower shell 12.

[0097] In this embodiment, the brake device further includes an elastic member 22, which is fixed within the mounting base 10 and disposed on the outer periphery of the rotating member 21. The elastic member 22 and the rotating member 21 form an interference fit. When driven by an external force, the elastic member 22 causes the rotating member 21 to have a clamped state (where it grips the transmission rod 61) and a loosened state (where it releases the transmission rod 61). When the rotating member 21 rotates in a first direction, the rotating member 21 is in the clamped state; when the rotating member 21 rotates in a second direction, the rotating member 21 is in the loosened state. This arrangement further enhances the braking effect of the brake device on the transmission rod 61 when the transmission rod 61 rotates in the first direction.

[0098] It can be understood that the rotating member 21 is a plastic member.

[0099] When the transmission rod 61 rotates in the first direction, the elastic member 22 deforms radially inward and contracts to hold the rotating member 21 tightly, so that the rotating member 21 holds the transmission rod 61 tightly to increase the friction resistance to the transmission rod 61, effectively preventing the transmission rod 61 from rotating in the unexpected first direction.

[0100] When the transmission rod 61 rotates in the second direction, the elastic member 22 deforms and expands radially outward to release the rotating member 21 , so that the rotating member 21 releases the transmission rod 61 to release the resistance to the transmission rod 61 .

[0101] In this embodiment, multiple braking of the transmission rod 61 can be achieved. Specifically, when the rotating member 21 rotates in the first direction, the elastic member 22 contracts radially inward and holds the rotating member 21 tightly. Under the action of the elastic member 22, the rotating member 21 is deformed and holds the transmission rod 61 tightly to increase the friction resistance to the transmission rod 61, thereby slowing down the rotation speed of the transmission rod 61. At the same time, the rotating member 21 rotates, driving the first friction member 31 and the second friction member 32 in the brake member 30 to rotate, and the rotating member 21 drives the first friction member 31 to abut and press the bottom surface 101 of the mounting seat 10, so that friction resistance is generated between the first friction member 31 and the bottom surface 101, thereby slowing down the rotation speed of the first friction member 31, and ultimately slowing down the rotation speed of the transmission rod 61. In addition, the boss 212 on the rotating member 21 drives the corresponding second friction member 32 to swing from the second position to the first position, and causes the second friction member 32 to abut against the side surface 102 of the mounting seat 10 and generate friction resistance, thereby slowing down the rotation speed of the second friction member 32 and the first friction member 31, and ultimately slowing down the rotation speed of the transmission rod 61.

[0102] like Figure 2 As shown, in the embodiment of this solution, the rotating member 21 includes a first annular portion 213 and a second annular portion 214 that are nested from inside to outside. The first annular portion 213 and the second annular portion 214 are connected by a plurality of connecting ribs 215. The plurality of connecting ribs 215 are spaced apart along the circumference of the first annular portion 213, and the first annular portion 213 forms a polygonal mounting hole 2100. This arrangement can reduce the weight of the rotating member 21, save material costs for the rotating member 21, and form a hollow structure of the rotating member 21, which facilitates deformation of the rotating member 21.

[0103] Specifically, a fixing groove 1101 is provided at one end of the upper shell 11 facing the lower shell 12, and the elastic member 22 is a torsion spring. The bottom end of the torsion spring has a bent protrusion 221 extending radially outward. The bent protrusion 221 is engaged with the fixing groove 1101 to achieve fixation between the elastic member 22 and the upper shell 11.

[0104] Furthermore, the spiral direction of the torsion spring is the same as the second direction along the direction from the upper shell 11 to the lower shell 12. This configuration allows the torsion spring to deform radially outward and release the rotating member 21 when the rotating member 21 rotates in the second direction, and to deform radially inward and hold the rotating member 21 tightly when the rotating member 21 rotates in the first direction.

[0105] Combine Figure 8 As shown, the second embodiment of this solution provides a brake device. This differs from the first embodiment in that both the first stop surface 2102 and the second stop surface 3102 are planes parallel to the rotation axis of the first friction member 31, i.e., the second stop surface 3102 is perpendicular to the reference plane. This arrangement allows the rotating member 21 to apply only a horizontal rotational force FC to the first friction member 31, without applying pressure toward the bottom surface 101. In other words, the friction between the first friction member 31 and the bottom surface 101 is solely due to the weight of the brake member 30 itself.

[0106] It can be understood that the braking device in this embodiment can be applied to a lift table with a single lift table leg, so that the transmission rod 61 can rotate along the expected second direction with minimal resistance, thereby improving the operating efficiency and response speed of the lift table leg.

[0107] Embodiment 3 of the present scheme provides a braking device, which differs from embodiment 2 in that when the arc plate is in the second position, the friction force between the arc plate and the side surface 102 of the mounting seat 10 is smaller than the friction force between the arc plate and the side surface 102 of the mounting seat 10 when the arc plate is in the first position.

[0108] Combine Figure 9 As shown, the swinging amplitude or shape of the arc plate can be designed so that when the boss 212 is in the disengaged position b, the arc plate is in the second position, and the boss 212 is still in contact with the inner side surface of the arc plate, so that the outer side surface of the arc plate is still in contact with the side surface 102 of the mounting seat 10 and has friction.

[0109] In the embodiment of this solution, as the boss 212 moves between the disengaged position b and the engaged position a, the boss 212 always contacts the inner side surface of the curved plate, driving the curved plate to continuously swing, and the curved plate continuously abuts against the side surface 102 of the mounting seat 10. Furthermore, when the boss 212 is in the disengaged position, the contact area between the curved plate and the side surface 102 of the mounting seat 10 is smaller than the contact area between the curved plate and the side surface of the mounting seat 10 when the boss 212 is in the engaged position.

[0110] like Figures 10 to 12As shown, a fourth embodiment of the present invention provides a lifting device, which includes a driving member 40, a lifting member 50, and the lifting device of the first embodiment described above. Specifically, a linear drive assembly 60 is provided within the lifting member 50 to drive the lifting member 50 up and down. The linear drive assembly 60 includes a transmission rod 61, and the driving member 40 is connected to the transmission rod 61 for rotating the transmission rod 61. The mounting seat 10 of the brake device is provided at one end of the lifting member 50 in the lifting direction. One end of the transmission rod 61 passes through the mounting seat 10 and the mounting hole 2100 of the rotating member 21 of the brake device along the lifting direction of the lifting member 50 and extends into the lifting member 50.

[0111] In the embodiment of this solution, the mounting seat 10 of the brake device is arranged on the top end of the lifting member 50 .

[0112] In the embodiment of this scheme, the lifting member 50 includes a coaxial outer cylinder 51, a middle cylinder 52 and an inner cylinder 53. The outer cylinder 51 is used to support the lifting device, the middle cylinder 52 is movably inserted into the outer cylinder 51, and the inner cylinder 53 is movably inserted into the middle cylinder 52.

[0113] The linear drive assembly 60 is a retractable structure, with the top end of the linear drive assembly 60 connected to the inner cylinder 53 and the bottom end of the linear drive assembly 60 connected to the outer cylinder 51. When the linear drive assembly 60 extends, it drives the middle cylinder 52 and the inner cylinder 53 to slide upward synchronously; when the linear drive assembly 60 contracts, it drives the middle cylinder 52 and the inner cylinder 53 to slide downward synchronously.

[0114] Specifically, in an embodiment of the present scheme, the lifting device also includes a protective cover 70, which is arranged at the top of the inner cylinder 53, and the driving member 40 is arranged inside the protective cover 70; the mounting seat 10 is arranged at the top of the inner cylinder 53, the top end portion of the mounting seat 10 is located inside the protective cover 70, and the bottom end portion of the mounting seat 10 is located inside the top end of the inner cylinder 53.

[0115] The linear drive assembly 60 also includes a first support tube 621 and a first nut seat 622, which are coaxial with the middle tube 52. The bottom end of the first support tube 621 is fixedly mounted on the bottom of the middle tube 52 and extends through the inner tube 53. The first nut seat 622 is fixedly mounted at the top opening of the first support tube 621. The transmission rod 61 extends through the first nut seat 622 and is threadedly connected to the first nut seat 622. This arrangement allows the transmission rod 61 to rotate when the driver 40 drives the transmission rod 61, which, under the action of the first nut seat 622, causes the inner tube 53 to slide relative to the middle tube 52 and the first support tube 621.

[0116] Furthermore, the linear drive assembly 60 also includes a second support tube 631, a second nut seat 632, and an externally threaded tube 633 coaxial with the outer tube 51. The bottom end of the second support tube 631 is fixedly mounted on the bottom of the outer tube 51. The second support tube 631 is inserted into the first support tube 621 and can slide relative to the first support tube 621. The second nut seat 632 is disposed at the opening at the top of the second support tube 631. The externally threaded tube 633 is rotatably disposed within the first support tube 621 and sleeved on the outer circumference of the transmission rod 61. The externally threaded tube 633 rotates synchronously with the transmission rod 61, but can move relative to the transmission rod 61 along the axis. The externally threaded tube 633 is disposed through the second nut seat 632, and the bottom end of the externally threaded tube 633 is located within the second support tube 631. Such arrangement enables the transmission rod 61 to rotate, driving the external threaded tube 633 to rotate synchronously. Under the action of the second nut seat 632 , the external threaded tube 633 drives the first support tube 621 to slide relative to the outer tube 51 and the second support tube 631 .

[0117] Specifically, the inner wall of the external threaded tube 633 is provided with a stop groove 6331, which extends along the axial direction of the external threaded tube 633. A stop block 611 is provided at the bottom of the transmission rod 61. The stop block 611 cooperates with the stop groove 6331 to stop rotation, and the stop block 611 can move along the stop groove 6331. With such a setting, the transmission rod 61 and the external threaded tube 633 can rotate synchronously, and the relative movement between the transmission rod 61 and the external threaded tube 633 can also be achieved.

[0118] It can be understood that the outer cylinder 51 can serve as the base of the lifting device, and the outer cylinder 51 is directly or indirectly fixed to the ground, that is, the second support cylinder 631 and the second nut seat 632 are also fixed relative to the ground.

[0119] Taking the lifting mechanism as an example, the driver 40 is activated, driving the transmission rod 61 to rotate in the second direction. The transmission rod 61 engages the externally threaded tube 633, preventing rotation. The externally threaded tube 633 rotates synchronously with the transmission rod 61 in the second direction. Because the externally threaded tube 633 is rotatably mounted within the first support tube 621 and rises and falls synchronously with the first support tube 621, the second nut seat 632 activates the externally threaded tube 633, driving the first support tube 621 and the middle tube 52 to rise synchronously. Because the transmission rod 61 is rotatably mounted within the inner tube 53 and rises and falls synchronously with the inner tube 53, the first nut seat 622 activates the transmission rod 61 to drive the inner tube 53 to rise synchronously. Specifically, when the transmission rod 61 rotates in the second direction, the middle tube 52 rises relative to the outer tube 51, while the inner tube 53 simultaneously rises relative to the middle tube 52.

[0120] A fifth embodiment of the present invention provides a lifting table, which includes a table top and the lifting device of the fourth embodiment, wherein the lifting device is connected to the table top.

[0121] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0122] 1. When the transmission rod 61 rotates unexpectedly (i.e., in the first direction), the brake member 30 can closely contact the bottom surface 101 and the side surface 102 to generate braking force. This contact design not only fully utilizes the structural characteristics of the brake member 30, but also allows the magnitude of the braking force to be flexibly adjusted by adjusting the material and surface treatment, thereby achieving improved braking effect without increasing the size of the device.

[0123] 2. The friction force between the first friction member 31 and the bottom surface 101 when the rotating member 21 rotates in the first direction can be adjusted by adjusting the inclination angle of the second inclined surface 3101; the friction force between the first friction member 31 and the bottom surface 101 when the rotating member 21 rotates in the second direction can be adjusted by adjusting the inclination angle of the second stop surface 3102;

[0124] 3. The friction between the curved plate and the side surface 102 when the curved plate is in the first position and the second position can be adjusted by designing the shape or swing amplitude of the curved plate;

[0125] 4. In scenarios where multiple lifting devices are driven synchronously, when the transmission rod 61 is in the intended rotational direction (the second direction), by properly designing the angle B between the second stop surface 3102 and the reference surface, as well as the shape or swing amplitude of the second friction member 32, it is possible to provide an appropriate buffering effect while not completely eliminating friction. This buffering effect helps synchronize the multiple lifting devices, reduces shaking and jitter caused by speed differences, and improves the user experience.

[0126] 5. The first friction member 31 and the second friction member 32 are combined with the torsion spring and the rotating member 21 . This solution can achieve a triple braking effect on the transmission rod 61 .

[0127] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

Claims

1. A braking device, characterized in that: The brake device comprises: Mounting seat (10); A rotating member (21) is rotatably disposed in the mounting seat (10), and a mounting hole (2100) is provided on the rotating member (21) for the transmission rod (61) to pass through; A brake component (30) is rotatably disposed in the mounting seat (10), and the rotating member (21) is linked to the brake component (30); When the rotating member (21) rotates in a first direction, the brake member (30) can abut against the bottom surface (101) and the side surface (102) of the mounting seat (10) and generate friction force, so that the brake device has a friction braking state for braking the transmission rod (61); when the rotating member (21) rotates in a second direction, the brake device is in a released state.

2. The brake device according to claim 1, characterized in that: The brake component (30) includes a first friction member (31), which is located at one end of the axial direction of the rotating member (21). The rotating member (21) is pressed against the first friction member (31). When the rotating member (21) rotates along the first direction, the end of the first friction member (31) away from the rotating member (21) abuts against the bottom surface (101) of the mounting seat (10) and generates friction.

3. The brake device according to claim 2, characterized in that: A first inclined surface (2101) is provided at one end of the rotating member (21) facing the first friction member (31), and a second inclined surface (3101) is provided at one end of the first friction member (31) facing the rotating member (21). When the rotating member (21) rotates in the first direction, the first inclined surface (2101) abuts against and presses against the second inclined surface (3101), so as to drive the first friction member (31) and the rotating member (21) to rotate synchronously and generate friction between the first friction member (31) and the bottom surface (101) of the mounting seat (10).

4. The brake device according to claim 3, characterized in that: One end of the rotating member (21) facing the first friction member (31) is further provided with a first stop surface (2102) connected to the first inclined surface (2101); one end of the first friction member (31) facing the rotating member (21) is further provided with a second stop surface (3102) connected to the second inclined surface (3101); when the rotating member (21) rotates along the second direction, the first stop surface (2102) abuts against and presses against the second stop surface (3102) to drive the first friction member (31) and the rotating member (21) to rotate synchronously.

5. The brake device according to claim 4, characterized in that: The first inclined surface (2101) is parallel to the second inclined surface (3101), the first stop surface (2102) is parallel to the second stop surface (3102), the angle between the second inclined surface (3101) and a reference surface is A, the angle between the second stop surface (3102) and the reference surface is B, A<B, and the reference surface is a plane perpendicular to the rotation axis of the first friction member (31); or, The first stop surface (2102), the first inclined surface (2101), the second stop surface (3102), and the second inclined surface (3101) are all provided in plurality, and the plurality of first inclined surfaces (2101) and the plurality of first stop surfaces (2102) are alternately arranged in sequence along the circumference of the rotating member (21); the plurality of second inclined surfaces (3101) and the plurality of second stop surfaces (3102) are alternately arranged in sequence along the circumference of the first friction member (31); or, The first stop surface (2102) and the second stop surface (3102) are both inclined surfaces; or, The first stop surface (2102) and the second stop surface (3102) are both planes parallel to the rotation axis of the first friction member (31).

6. The brake device according to claim 4, characterized in that: A first annular protrusion (211) is provided at one end of the rotating member (21) facing the first friction member (31); an end surface of the first annular protrusion (211) facing the first friction member (31) forms the first inclined surface (2101) and the first stop surface (2102); A second annular protrusion (311) is provided at one end of the first friction member (31) facing the rotating member (21), and an end surface of the second annular protrusion (311) facing the rotating member (21) forms the second inclined surface (3101) and the second stop surface (3102).

7. The brake device according to any one of claims 2 to 6, characterized in that: The brake member (30) further includes a second friction member (32), the second friction member (32) being swingably disposed on the first friction member (31), the rotating member (21) being linked to the second friction member (32), so that the second friction member (32) has a first position of outward expansion and a second position of inward contraction; When the rotating member (21) rotates in the first direction, the second friction member (32) is in the first position, and the second friction member (32) abuts against the side surface (102) of the mounting seat (10) and generates friction force; When the rotating member (21) rotates along the second direction, the second friction member (32) is in the second position, and the second friction member (32) is separated from the side surface (102) of the mounting seat (10); or, the second friction member (32) is in contact with the side surface (102) of the mounting seat (10), and when the second friction member (32) is in the second position, the friction force between the second friction member (32) and the side surface (102) of the mounting seat (10) is smaller than the friction force between the second friction member (32) and the side surface of the mounting seat (10) when the second friction member (32) is in the first position.

8. The brake device according to claim 7, characterized in that: The second friction member (32) is pivotally connected to the first friction member (31), and a clamping groove (3201) is provided on the inner side of the second friction member (32); a boss (212) is provided on one end of the rotating member (21) facing the first friction member (31), and the boss (212) has a clamping position that cooperates with the clamping groove (3201) and a disengagement position that disengages from the clamping groove (3201); when the boss (212) is in the clamping position, the second friction member (32) is in the first position, and when the boss (212) is in the disengagement position, the second friction member (32) is in the second position.

9. The brake device according to claim 8, characterized in that: There are a plurality of second friction members (32), and the plurality of second friction members (32) are arranged at intervals along the circumference of the first friction member (31) at the periphery of the first friction member (31); there are a plurality of bosses (212), and the plurality of bosses (212) are arranged at intervals along the circumference of the rotating member (21) at the periphery of the rotating member (21); the plurality of bosses (212) and the plurality of second friction members (32) are arranged in a one-to-one correspondence; and / or, The second friction member (32) is an arc-shaped plate, the outer surface of which is an outwardly convex arc-shaped surface, and the contour of the portion of the arc-shaped surface that can abut against the side surface (102) of the mounting seat (10) is adapted to the contour of the side surface (102).

10. The brake device according to any one of claims 1 to 6, characterized in that: The mounting seat (10) comprises an upper shell (11) and a lower shell (12) that are detachably connected, the rotating member (21) is located in the upper shell (11), and the brake member (30) is located in the lower shell (12); and / or, The brake device also includes an elastic member (22), which is fixed in the mounting seat (10) and arranged on the outer periphery of the rotating member (21). The elastic member (22) is interference-fitted with the rotating member (21). Under external force driving, the elastic member (22) enables the rotating member (21) to have a clamping state of clamping the transmission rod (61) and a loosening state of loosening the transmission rod (61). When the rotating member (21) rotates along the first direction, the rotating member (21) is in the clamping state; when the rotating member (21) rotates along the second direction, the rotating member (21) is in the loosening state.

11. A lifting device, characterized in that: include: A driving member (40); A lifting member (50), wherein a linear drive assembly (60) is provided in the lifting member (50) for driving the lifting member (50) to move up and down, the linear drive assembly (60) comprising the transmission rod (61), the driving member (40) being drivingly connected to the transmission rod (61) to rotate the transmission rod (61); The brake device according to any one of claims 1 to 10, wherein the mounting seat (10) of the brake device is arranged on one end of the lifting member (50) along the lifting direction, and one end of the transmission rod (61) passes through the mounting seat (10) and the mounting hole (2100) of the rotating part (21) of the brake device along the lifting direction of the lifting member (50) and extends into the lifting member (50).

12. A lifting table, characterized in that: The utility model comprises a table top and the lifting device according to claim 11 connected to the table top.

Images