Bidirectional braking device

Abstract

The embodiment of the invention provides a bidirectional braking device. The bidirectional braking device comprises a mounting seat, a friction block and a linkage structure, the mounting seat comprises a base and a guide block fixed on the base; the friction block comprises a first friction block body and a second friction block body, the first friction block body and the second friction block body are each provided with a guide groove, and the guide block is arranged in the guide grooves so that the first friction block body and the second friction block body can move in the length direction of the guide grooves. The movement directions of the first friction block and the second friction block in the first direction are opposite; the linkage structure is connected with the mounting base, the first friction block and the second friction block so that the first friction block and the second friction block can be in linkage. The included angle between the moving direction of the first friction block and the friction face of the to-be-braked part and the included angle between the moving direction of the second friction block and the friction face of the to-be-braked part are both 5-20 degrees. The bidirectional braking device can achieve the technical effect of bidirectional braking.

Description

Technical Field

[0001] The embodiments of the present application belong to the field of linear movement or lifting, and in particular to a bidirectional braking device. Background Art

[0002] Linear moving or lifting devices are widely used in many products. Since some products have high safety requirements, an additional device is often required to ensure that the moving or lifting device will not move accidentally. Therefore, a safety brake device is required, and the braking function of the safety brake device needs to be released during movement.

[0003] The prior art has a method of achieving braking by motor drive, such as patent CN219009621U, but this method relies on external power. Once the external power fails, other safe and reliable braking purposes cannot be achieved.

[0004] The prior art sets fixed steps in the lifting or moving direction, and sets a corresponding safety brake clamping mechanism on the moving device, and realizes installation braking by clamping the clamping mechanism with the guide rail step, such as patent CN116101929A. However, this structure requires a complex fixed step structure, and cannot achieve safe braking at any position, and can only achieve safe braking at a specified step position. Summary of the invention

[0005] In order to solve or alleviate the braking problem of a linear moving or lifting device in bidirectional directions, the present invention provides a bidirectional braking device, including a mounting seat, a friction block and a linkage structure;

[0006] The mounting seat comprises a base and a guide block fixed on the base;

[0007] The friction block comprises a first friction block and a second friction block, the first friction block and the second friction block are both provided with a guide groove, the guide block is arranged in the guide groove so that the first friction block and the second friction block move respectively along the length direction of the guide groove, and the movement directions of the first friction block and the second friction block in the first direction are opposite;

[0008] The linkage structure is respectively connected to the mounting seat, the first friction block and the second friction block so that the first friction block and the second friction block are linked;

[0009] The included angles between the movement directions of the first friction block and the second friction block and the friction surface of the braked component are both 5°-20°.

[0010] As a further improvement of the embodiment of the present invention, the linkage structure includes a first connecting rod, a second connecting rod, a first sliding block and a second sliding block, and a sliding rod is provided on the base;

[0011] The first slider and the second slider are sleeved on the slider and move along the length direction of the slider;

[0012] The first connecting rod is hinged to the first friction block and the first sliding block respectively, and the second connecting rod is hinged to the second friction block and the second sliding block respectively.

[0013] As a further improvement to the embodiment of the present invention, the first friction block and the second friction block are mirror-imaged with a center line between the first sliding block and the second sliding block as a center axis.

[0014] As a further improvement of the embodiment of the present invention, the linkage structure further includes a third connecting rod and a fourth connecting rod;

[0015] One end of the third connecting rod is hinged to the first slider, one end of the fourth connecting rod is hinged to the second slider, and the other end of the third connecting rod is hinged to the other end of the fourth connecting rod;

[0016] The base is also provided with a guide structure, and the guide structure is used to guide the hinge between the third connecting rod and the fourth connecting rod to move along a length direction perpendicular to the sliding rod.

[0017] As a further improvement of an embodiment of the present invention, the guide structure includes a pulling member and a sliding groove, the sliding groove is arranged perpendicular to the sliding rod, the hinge between the third connecting rod and the fourth connecting rod is restricted to move in the sliding groove, one end of the pulling member is connected to the hinge between the third connecting rod and the fourth connecting rod, and the pulling member is driven to make the hinge move in the sliding groove, so that the first slider and the second slider are close to each other, and the first slider and the second slider are close to each other so that the first friction block and the second friction block are respectively separated from the braked member.

[0018] As a further improvement of an embodiment of the present invention, the linkage structure also includes an elastic member, which is arranged between the first slider and the second slider. The elastic member causes the first slider and the second slider to move away from each other so that the first friction block and the second friction block respectively abut against the friction surface of the braked member.

[0019] As a further improvement to an embodiment of the present invention, the braked member has two friction surfaces parallel to each other, the bidirectional braking device is arranged between the two friction surfaces, and the first friction block and the second friction block are both mirror-arranged with the slide rod as the central axis.

[0020] As a further improvement of the embodiment of the present invention, it further includes a cover plate, which is fixed on the base, and the pulling member is arranged between the cover plate and the base.

[0021] As a further improvement of the embodiment of the present invention, it also includes a friction plate, and the friction plate is provided on the side of the first friction block and the second friction block facing the braked part, and the friction plate is provided with anti-slip grooves.

[0022] As a further improvement of the embodiment of the present invention, the friction plate is connected to the first friction block and the second friction block through a dovetail groove.

[0023] Compared with the prior art, the first friction block and the second friction block are forced to move along the length direction of their respective guide grooves under the interaction between the guide groove and the guide block. The length direction of the guide groove is opposite to the movement direction in the first direction, and the linkage structure makes the first friction block and the second friction block linked to achieve the effect of synchronous braking. The movement direction of the first friction block and the second friction block are at an angle of 5°-20° with the friction surface of the braked part. Therefore, when the braked part moves downward along the first direction, the bidirectional braking device of the present invention is subjected to a downward force as a whole. At this time, it is mainly the first friction block that plays a braking role, and the angle between the first friction block and the friction surface is 5°-20°, which plays a friction locking effect. Conversely, when the braked part moves upward along the first direction, the second friction block plays a braking role, and also locks the bidirectional braking device and the braked part in the present invention. Therefore, the bidirectional braking device in the present invention can achieve the technical effect of bidirectional braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. Some specific embodiments of the present application will be described in detail in an illustrative and non-restrictive manner with reference to the drawings. The same reference numerals in the drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the drawings:

[0025] Figure 1 An exploded schematic diagram of a bidirectional braking device in an embodiment of the present invention is shown;

[0026] Figure 2 A schematic top view of a bidirectional braking device in an embodiment of the present invention in a use state is shown;

[0027] Figure 3 Shows Figure 2 Schematic diagram of the cross section at AA in the middle;

[0028] Figure 4 A schematic diagram showing the principle of a bidirectional braking device in an embodiment of the present invention is shown;

[0029] Figure 5 A schematic diagram of the combination of the slider and the friction plate in the present invention is shown.

[0030] Mounting seat-10; friction block-20; linkage structure-30; base-110; guide block-120; brake member-40; first friction block-210; second friction block-220; guide groove-230; friction surface-410; first connecting rod-310; second connecting rod-320; first slider-330; second slider-340; slide rod 1110; third connecting rod-350; fourth connecting rod-360; guide structure-1120; pulling member-1121; slide groove-1122; elastic member-370; cover plate-50; friction plate-60; anti-slip pattern-610; dovetail groove-70; pressure block-80; groove-130. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only embodiments of a part of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0032] In order to solve the problem of braking a linear moving or lifting device in two directions, this embodiment provides a two-way braking device, please refer to Figure 1-Figure 3 , comprising a mounting seat 10, a friction block 20 and a linkage structure 30;

[0033] The mounting base 10 includes a base 110 and a guide block 120 fixed on the base 110;

[0034] The friction block 20 includes a first friction block 210 and a second friction block 220. The first friction block 210 and the second friction block 220 are both provided with a guide groove 230. The guide block 120 is provided in the guide groove 230 so that the first friction block 210 and the second friction block 220 move along the length direction of the guide groove 230 respectively. The movement directions of the first friction block 210 and the second friction block 220 in the first direction are opposite.

[0035] The linkage structure 30 is respectively connected to the mounting seat 10, the first friction block 210 and the second friction block 220 to enable the first friction block 210 and the second friction block 220 to be linked;

[0036] The included angles between the movement directions of the first friction block 210 and the second friction block 220 and the friction surface 410 of the braked member 40 are both 5°-20°.

[0037] In a more preferred embodiment, please refer to Figure 3The linkage structure 30 includes a first connecting rod 310, a second connecting rod 320, a first slider 330 and a second slider 340, and a slider 1110 is provided on the base 110;

[0038] The first slider 330 and the second slider 340 are sleeved on the slider 1110 and move along the length direction of the slider 1110;

[0039] The first connecting rod 310 is hinged to the first friction block 210 and the first sliding block 330 respectively, and the second connecting rod 320 is hinged to the second friction block 220 and the second sliding block 340 respectively.

[0040] Compared with the prior art, the first friction block 210 and the second friction block 220 are forced to move along the length direction of their respective guide grooves 230 under the interaction between the guide groove 230 and the guide block 120. The length direction of the guide groove 230 is opposite to the movement direction in the first direction, and the linkage structure 30 makes the first friction block 210 and the second friction block 220 linked to achieve the effect of synchronous braking. The movement direction of the first friction block 210 and the second friction block 220 and the friction surface 410 of the brake member 40 are both 5°-20°. Therefore, when the brake member 40 is about to move downward, the bidirectional braking device of the present invention is subjected to a downward force as a whole. At this time, it is mainly the first friction block 210 that plays a braking role, and the angle between the first friction block 210 and the friction surface 410 is 5°-20°, which plays a friction locking effect. On the contrary, when the brake member 40 is about to move upward, the second friction block 220 plays a braking role, which will also lock the bidirectional braking device of the present invention and the brake member 40. Therefore, the bidirectional braking device in the present invention can achieve the technical effect of bidirectional braking.

[0041] It should be noted that the sliding bar 1110 is generally arranged along the first direction.

[0042] Specifically, please refer to Figure 4 When the brake member 40 is subjected to an unexpected directional force F, the sliding friction block 20 is mainly subjected to four forces: the pressure N1=F*sinɑ transmitted by the guide block 120; the friction force f2=N1*u1 between the guide block 120 and the friction block 20, wherein u1 is the friction coefficient between the guide block 120 and the friction block 20; the lateral pressure N2=N1*cosɑ+f2*sinɑ given to the friction block 20 by the brake member 40; the friction force between the brake member 40 and the friction block 20 is f1=N2*u2, wherein u2 is the friction coefficient between the brake member 40 and the friction block 20.

[0043] At this time, the difference in the component force of the friction block 20 in the first direction is Δ=(f2*cosɑ+f1+N1*cosɑ)-N1*sinɑ=f2*cosɑ+f1+N1(cosɑ-sinɑ).

[0044] Since the value of ɑ is between 5° and 20°, cosɑ-sinɑ must be greater than 0, that is, N1(cosɑ-sinɑ) is greater than 0, and then f2*cosɑ and f1 are both greater than 0, and Δ is also greater than 0. Therefore, when the friction block 20 is subjected to the downward force F of the guide block 120, the first friction block 210 will be locked due to the friction force.

[0045] On the contrary, when the friction block 20 is subjected to the upward force of the guide block 120 , the second friction block 220 will be locked due to the friction force.

[0046] Finally, no matter upward or downward, the friction block 20 including the first friction block 210 and the second friction block 220 is locked to produce a braking effect.

[0047] Preferably, the ɑ angle in this embodiment is 10°.

[0048] Simple explanation: When a friction object contacts a fixed object, the friction object is subjected to a force that is inclined to the contact surface of the fixed object. This force produces two components, one is perpendicular to the contact surface, and the other is parallel to the contact surface. The force perpendicular to the contact surface produces a corresponding friction force. If the maximum static friction force is greater than the force parallel to the contact surface, the friction object and the fixed object can be locked.

[0049] In a more preferred embodiment, please refer to Figure 3 The first friction block 210 and the second friction block 220 are mirror-imaged with the center line between the first sliding block 330 and the second sliding block 340 as the center axis.

[0050] The linkage structure 30 further includes a third link 350 and a fourth link 360;

[0051] One end of the third connecting rod 350 is hinged to the first slider 330, one end of the fourth connecting rod 360 is hinged to the second slider 340, and the other end of the third connecting rod 350 is hinged to the other end of the fourth connecting rod 360;

[0052] A guide structure 1120 is also provided on the base 110 , and the guide structure 1120 is used to guide the hinge between the third connecting rod 350 and the fourth connecting rod 360 to move along the length direction of the vertical sliding rod 1110 .

[0053] In this embodiment, the first slider 330 and the second slider 340 are arranged symmetrically with respect to the center thereof, and the linkage structure 30 includes a third link 350 and a fourth link 360, one end of the third link 350 and the fourth link 360 are hinged to each other, and the other end is respectively hinged to the first slider 330 and the second slider 340. Therefore, through the linkage between the third link 350 and the fourth link 360, it is ensured that the first slider 330 and the second slider 340 move synchronously, so that the first friction block 210 and the second friction block 220 move synchronously to achieve the effect of simultaneously abutting the friction surface 410.

[0054] The guide structure 1120 is used to guide the hinge between the third link 350 and the fourth link 360 to move along the length direction of the vertical slide bar 1110. The main function is to make the hinge between the third link 350 and the fourth link 360 always move along the second direction. On the one hand, it is to prevent the first slider 330 and the second slider 340 from moving from the slide bar 1110 as a whole. On the other hand, it is also to facilitate the hinge between the third link 350 and the fourth link 360 to achieve the effect of unlocking and braking.

[0055] It should be noted that the guide structure 1120 is generally fixedly mounted on the base 110. The guide structure 1120 can be a groove, a slide rail or other limited movement structure that constrains the hinge between the third connecting rod 350 and the fourth connecting rod 360.

[0056] Generally speaking, there are various implementations of the linkage structure 30, such as electronically controlled linkage and other forms of mechanical linkage structures 30. Any structure or scheme that can achieve the linkage effect between the first friction block 210 and the second friction block 220 belongs to the protection scope of the present invention.

[0057] In a more preferred embodiment, please refer to Figure 3 The guide structure 1120 includes a pulling member 1121 and a slide groove 1122. The slide groove 1122 is arranged perpendicular to the slide rod 1110. The hinge between the third connecting rod 350 and the fourth connecting rod 360 is restricted to move in the slide groove 1122. One end of the pulling member 1121 is connected to the hinge between the third connecting rod 350 and the fourth connecting rod 360. By driving the pulling member 1121 to make the hinge move in the slide groove 1122, the first slider 330 and the second slider 340 are brought close to each other. The first slider 330 and the second slider 340 are brought close to each other so that the first friction block 210 and the second friction block 220 are respectively separated from the brake member 40.

[0058] In this embodiment, the slide groove 1122 plays a role of limiting movement, and the pulling member 1121 is connected to the hinge between the third connecting rod 350 and the fourth connecting rod 360. By pulling the pulling member 1121, the first slider 330 and the second slider 340 are moved closer to each other, so that the first friction block 210 and the second friction block 220 are moved and separated from the friction surface 410 of the braked member 40 to release the braking effect.

[0059] In a more preferred embodiment, the linkage structure 30 also includes an elastic member 370, which is disposed between the first slider 330 and the second slider 340. The elastic member 370 moves the first slider 330 and the second slider 340 away from each other so that the first friction block 210 and the second friction block 220 respectively abut against the friction surface 410 of the front brake member 40.

[0060] The function of the elastic member 370 is to keep the first slider 330 and the second slider 340 at a certain distance without pulling the pulling member 1121, and then the first friction block 210 and the second friction block 220 abut against the friction surface 410, so that the bidirectional braking device of the present invention can achieve the effect of braking and locking at any time. The elastic member 370 is preferably a compression spring, which can be sleeved on the slide bar 1110.

[0061] Specifically, please refer to Figure 3 A groove 130 is provided at the hinged position of the third link 350 and the fourth link 360. The function of the groove 130 is to prevent the linkage structure 30 from affecting the movement of the second friction block 220 through the movement of the first friction block 210, thereby causing the friction block 20 to fail to contact the friction surface 410, resulting in brake failure. The groove 130 can avoid linkage. Specifically, when the brake member moves downward, the first friction block 210 will abut against the friction surface 410 to achieve braking, and the second friction block 220 will move upward due to the friction force. During the movement, it will drive the second link 320, and then drive the second slider 340 to move upward. The second slider 340 pushes the fourth link 360 into the groove 130, and cannot push the pulling member 1121 to move, thereby avoiding driving the first friction block 210.

[0062] It should be noted that the groove 130 is disposed on the slide groove 1122 .

[0063] In a more preferred embodiment, the braked member 40 has two parallel friction surfaces 410 , the bidirectional braking device is disposed between the two friction surfaces 410 , and the first friction block 210 and the second friction block 220 are both mirror-imaged with the slide rod 1110 as the central axis.

[0064] In this embodiment, the braked member 40 has two parallel friction surfaces 410, the two-way brake device is arranged between the two friction surfaces 410, and the first friction block 210 and the second friction block 220 are both arranged in a mirror image with the slide bar 1110 as the central axis, which can just achieve the effect of braking on both sides. On the one hand, the friction between the braked member 40 and the two-way brake device can be increased. On the other hand, the mirror image arrangement with the slide bar 1110 as the central axis can make the force of the two-way brake device in the second direction as a whole balanced, and avoid the two-way brake device fixed connection being subjected to excessive force for a long time, resulting in failure.

[0065] It should be noted that, corresponding to this embodiment, the first connecting rod 310, the second connecting rod 320, the third connecting rod 350 and the fourth connecting rod 360 are also mirror-set with the sliding rod 1110 as the central axis, and share the first sliding block 330 and the second sliding block 340.

[0066] In a more preferred embodiment, please refer to Figure 1 , further comprising a cover plate 50 , the cover plate 50 is fixed on the base 110 , and the pulling member 1121 is arranged between the cover plate 50 and the base 110 .

[0067] In this embodiment, the function of the cover plate 50 is to constrain the pulling member 1121 so that the force direction of the pulling member 1121 is consistent.

[0068] The cover plate 50 is usually further provided with a pressing block 80 , and the pressing block 80 is used to press the pulling member 1121 .

[0069] In a more preferred embodiment, a friction plate 60 is further included. The friction plate 60 is provided on one side of the first friction block 210 and the second friction block 220 facing the braked member 40 , and the friction plate 60 is provided with anti-skid patterns 610 .

[0070] In this embodiment, the friction plate 60 is provided with anti-skid grooves 610, which can increase the friction coefficient u2, thereby improving the braking effect and preventing u2 from being too small, resulting in a failure to lock.

[0071] In a more preferred embodiment, please refer to Figure 5 The friction plate 60 is connected to the first friction block 210 and the second friction block 220 respectively through the dovetail groove 70.

[0072] The dovetail groove 70 can ensure the regular replacement of the friction plate 60. Due to the particularity of the brake device, the friction plate 60 will wear out over time, so the friction plate 60 must be replaced regularly. The dovetail groove 70 can not only stabilize the connection between the friction plate 60 and the friction block 20, but also facilitate the disassembly and assembly of the friction plate 60.

[0073] It should also be noted that the relationship between the two-way braking device and the braked member 40 in the present invention is relative movement. That is to say, the braked member 40 can be fixed, and the two-way braking device is installed on a movable member that moves relative to the fixed member. Alternatively, the braked member 40 is movable, and the two-way braking device is fixedly installed. The installation and implementation methods of the two-way braking device in the present invention are various, and as long as the two-way braking effect in the present invention can be achieved, they all fall within the protection scope of the present invention.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A bidirectional braking device, characterized in that: It includes a mounting seat, a friction block and a linkage structure; The mounting seat comprises a base and a guide block fixed on the base; The friction block comprises a first friction block and a second friction block, the first friction block and the second friction block are both provided with a guide groove, the guide block is arranged in the guide groove so that the first friction block and the second friction block move respectively along the length direction of the guide groove, and the movement directions of the first friction block and the second friction block in the first direction are opposite; The linkage structure is respectively connected to the mounting seat, the first friction block and the second friction block so that the first friction block and the second friction block are linked; The included angles between the movement directions of the first friction block and the second friction block and the friction surface of the braked component are both 5°-20°.

2. A bidirectional braking device according to claim 1, characterized in that: The linkage structure comprises a first connecting rod, a second connecting rod, a first sliding block and a second sliding block, and a sliding rod is arranged on the base; The first slider and the second slider are sleeved on the slider and move along the length direction of the slider; The first connecting rod is hinged to the first friction block and the first sliding block respectively, and the second connecting rod is hinged to the second friction block and the second sliding block respectively.

3. A bidirectional braking device as claimed in claim 2, characterized in that: The first friction block and the second friction block are mirror-imaged with a center line between the first sliding block and the second sliding block as a center axis.

4. A bidirectional braking device as claimed in claim 2, characterized in that: The linkage structure also includes a third connecting rod and a fourth connecting rod; One end of the third connecting rod is hinged to the first slider, one end of the fourth connecting rod is hinged to the second slider, and the other end of the third connecting rod is hinged to the other end of the fourth connecting rod; The base is also provided with a guide structure, and the guide structure is used to guide the hinge between the third connecting rod and the fourth connecting rod to move along a length direction perpendicular to the sliding rod.

5. A bidirectional braking device as claimed in claim 4, characterized in that: The guide structure includes a pulling member and a sliding groove, the sliding groove is arranged perpendicular to the sliding rod, the hinge between the third connecting rod and the fourth connecting rod is restricted to move in the sliding groove, one end of the pulling member is connected to the hinge between the third connecting rod and the fourth connecting rod, and the pulling member is driven to make the hinge move in the sliding groove, so that the first sliding block and the second sliding block are brought close to each other, and the first sliding block and the second sliding block are brought close to each other so that the first friction block and the second friction block are respectively separated from the braked member.

6. A bidirectional braking device as claimed in claim 5, characterized in that: The linkage structure further includes an elastic member, which is disposed between the first slider and the second slider. The elastic member causes the first slider and the second slider to move away from each other so that the first friction block and the second friction block respectively abut against the friction surface of the braked member.

7. A bidirectional braking device as claimed in claim 5, characterized in that: The braked member has two friction surfaces parallel to each other, the bidirectional braking device is arranged between the two friction surfaces, and the first friction block and the second friction block are both arranged in a mirror image with the slide bar as the central axis.

8. A bidirectional braking device as claimed in claim 5, characterized in that: It also includes a cover plate, which is arranged on the base, and the pulling member is arranged between the cover plate and the base.

9. A bidirectional braking device as claimed in claim 1, characterized in that: It also includes a friction plate, wherein the first friction block and the second friction block are provided with the friction plate on one side facing the braked part, and the friction plate is provided with anti-skid patterns.

10. A bidirectional braking device as claimed in claim 9, characterized in that: The friction plate is connected to the first friction block and the second friction block through a dovetail groove.

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