Trundle brake

Abstract

The utility model relates to the technical field of trundle brakes, solves the technical problem that when a trundle is affected by large external force, a braking device relieves limitation on the trundle, and particularly relates to the trundle and a shell rotationally installed on the two sides of the trundle. A push plate which slides in the guide groove and penetrates through the shell to the outside is arranged in the shell, a rectangular block sliding in the connecting cavity is arranged on one side of the push plate, ratchets are arranged on the sides, away from the inclined face, of the inclined face rectangular columns, and ratchet grooves making contact with the ratchets are formed in one sides of the trundles. A user controls the push plate to move to the middle of the guide groove, the first trapezoidal block extrudes the inclined plane rectangular column to limit a trundle rotating shaft, meanwhile, the push plate continues to be controlled to move to the lower half portion of the guide groove, the second trapezoidal block makes contact with the first triangular plate and the second triangular plate to extrude the first triangular plate and the second triangular plate, and ratchets are separated from ratchet grooves. The purpose of releasing limitation of the trundles is achieved, and a user can conveniently use the braking mechanism to control movement of the equipment in the working period.

Description

Technical Field

[0001] The utility model relates to the technical field of caster brakes, in particular to a caster brake. Background Art

[0002] The movable caster has a structure that can rotate 360° and is usually used in suitcases, carts, etc. It has good driving flexibility, which is conducive to the user to push the device to move. The movable caster generally has a braking device to limit the movement of the device and prevent it from moving under external force. The braking method of the braking device is generally to squeeze the caster and increase the static friction between the caster and the spring to achieve the purpose of fixing the caster.

[0003] However, in the process of using the movable caster and its braking device, when the external force applied to the device is greater than the maximum static friction between the iron sheet and the caster, the caster will start to rotate, and at the same time will cause a reaction force on the spring sheet, causing the braking device to release the restriction on the caster, thereby causing the device to be out of control, causing certain safety hazards and making it difficult for the user to push the device to move. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a caster brake which solves the technical problem that when the caster is subjected to a large external force, the brake device releases the restriction on the caster, thereby achieving the purpose of protecting the personal safety of the user when pushing the device to move.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A caster brake comprises a caster and a housing rotatably mounted on both sides of the caster, wherein a brake mechanism for limiting the rotation of the caster is arranged in the housing;

[0007] The braking mechanism includes a connecting cavity arranged in a shell, a guide groove connected to the connecting cavity is arranged on the surface of the shell, and a push plate sliding in the guide groove and passing through the shell to the outside is arranged in the shell, a rectangular block sliding in the connecting cavity is arranged on one side of the push plate, a first trapezoidal block is arranged on one side of the rectangular block, and a positioning piece for limiting the movement of the rectangular block in the connecting cavity is arranged on one side of the rectangular block, an inclined rectangular column contacting the first trapezoidal block is arranged through the shell, a ratchet is arranged on the side of the inclined rectangular column facing away from the inclined surface, and a ratchet groove contacting the ratchet is arranged on one side of the caster.

[0008] Furthermore, the positioning member includes a slide groove arranged on one side of the rectangular block, and a rectangular frame sliding in the slide groove is arranged inside the rectangular block, a first spring is arranged inside the rectangular frame, and a second trapezoidal block fixedly connected to the first spring is slidably arranged inside the rectangular frame, a third trapezoidal block contacting the second trapezoidal block is arranged on the surface of the connecting cavity, and a reset member for resetting the rectangular block in the connecting cavity is arranged on the surface of the connecting cavity.

[0009] Furthermore, a second spring fixedly connected to the rectangular block is provided at the top of the connecting cavity.

[0010] Furthermore, the length of the rectangular frame is only half of the length of the slide slot.

[0011] Furthermore, the reset member includes a triangular plate 1 arranged directly below the third trapezoidal block, and a triangular plate 2 located above the third trapezoidal block is provided at the top of the connecting cavity.

[0012] Furthermore, an iron sheet is provided on the surface of the inclined rectangular column, and a magnet magnetically connected to the iron sheet is provided in the shell.

[0013] By means of the above technical solution, the utility model provides a caster brake having at least the following

[0014] Beneficial effects:

[0015] 1. Due to the setting of the braking mechanism of the utility model, the user controls the push plate to move to the middle of the guide groove, so that during the movement of the rectangular block, the second trapezoidal block moves from just above the third trapezoidal block to just below, and the first trapezoidal block squeezes the inclined rectangular column, so that the ratchet and the ratchet groove squeeze each other, thereby completing the restriction of the caster shaft, and at the same time continues to control the push plate to move to the lower half of the guide groove, so that the second trapezoidal block contacts and squeezes the triangle plate one and the triangle plate two, so that the second trapezoidal block moves again to just above the third trapezoidal block, and at the same time the inclined rectangular column loses the squeezing support of the first trapezoidal block, so that the ratchet and the ratchet groove are separated, completing the purpose of releasing the restriction on the caster, which is beneficial for the user to use the braking mechanism to control the movement of the equipment during work.

[0016] 2. Due to the arrangement of the iron sheet and the magnet, when the ratchet is separated from the ratchet groove, the iron sheet is adsorbed onto the surface of the magnet and drives the inclined rectangular column to reset to the initial position in the shell. This helps to reduce the possibility of damage to the ratchet caused by the contact between the ratchet and the ratchet groove when the inclined rectangular column moves freely in the shell during the rotation of the caster, and helps to maintain the braking effect of the brake mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide 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 improper limitations on the present application.

[0018] In the attached picture:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2It is a side sectional schematic diagram of the overall structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the connecting cavity of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the positioning member of the utility model;

[0023] Figure 5 This is a structural schematic diagram of the second embodiment of the utility model.

[0024] In the figure: 1, caster; 2, shell; 3, brake mechanism; 31, connecting cavity; 32, guide groove; 33, push plate; 34, rectangular block; 35, first trapezoidal block; 36, positioning member; 361, slide groove; 362, rectangular frame; 363, first spring; 364, second trapezoidal block; 365, third trapezoidal block; 366, reset member; 3661, triangle plate one; 3662, triangle plate two; 37, inclined rectangular column; 38, ratchet; 39, ratchet groove; 310, second spring; 311, iron sheet; 312, magnet. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] The existing casters are generally placed on equipment that is convenient for users to push goods, so that the equipment has a certain mass and inertia. When the user pushes the equipment to move and uses the brake device to fix the casters, when the equipment is subjected to a large external force, under the action of the equipment's own inertia, it is easy for the casters to overcome the maximum static friction between the spring sheet and drive the equipment to move, which is very likely to cause the equipment to tip over or move without direction, thereby causing damage to the user and the goods, which is not conducive to the user pushing the equipment to move in daily work. This embodiment provides a caster brake, such as Figure 1-Figure 4 As shown, it includes a caster 1 and a shell 2 rotatably mounted on both sides of the caster 1. A brake mechanism 3 for limiting the rotation of the caster 1 is provided in the shell 2. When a user pushes the device to move, the brake mechanism 3 of the device needs to be activated. When the device is limited in place, it is only necessary to push the brake mechanism 3 on one side of each caster 1, so that the caster 1 cannot rotate normally in the shell 2, which is beneficial to limit the caster 1 in the shell 2 and prevent the caster 1 from moving by overcoming the maximum static friction limit when subjected to a large external force.

[0028] The brake mechanism 3 includes a connecting cavity 31 arranged in the shell 2, and the rectangular block 34 moves linearly up and down along the connecting cavity 31, and in the initial state, the rectangular block 34 contacts the top of the connecting cavity 31, and the surface of the shell 2 is provided with a guide groove 32 connected to the connecting cavity 31, and the push plate 33 can slide in the guide groove 32, so that it is convenient for the user to push the push plate 33 to drive the rectangular block 34 to move, and in the initial state, the push plate 33 contacts the top of the guide groove 32, and the shell 2 is provided with a push plate 33 that slides in the guide groove 32 and penetrates the shell 2 to the outside, and the user can control the movement of the push plate 33 to complete the restriction or release of the caster 1. A rectangular block 34 is provided on one side for sliding in the connecting cavity 31. When the rectangular block 34 slides halfway in the connecting cavity 31, the positioning member 36 is triggered to limit the rotation of the caster 1 in the housing 2. A first trapezoidal block 35 is provided on one side of the rectangular block 34. When the rectangular block 34 starts to move in the connecting cavity 31 and moves halfway in the connecting cavity 31, the first trapezoidal block 35 starts to squeeze the inclined rectangular column 37 and completely squeezes the end of the inclined rectangular column 37 that contacts the first trapezoidal block 35 into the housing 2. A positioning member 36 is provided on one side of the rectangular block 34 for limiting the movement of the rectangular block 34 in the connecting cavity 31. The movement of the rectangular block 34 in the connecting cavity 31 can be divided into The three-step cycle is formed, and the housing 2 is provided with an inclined rectangular column 37 in contact with the first trapezoidal block 35. The inclined rectangular column 37 slides linearly in the housing 2, and the inclined surface of the inclined rectangular column 37 contacts the inclined surface of the first trapezoidal block 35. A ratchet 38 is provided on the side of the inclined rectangular column 37 away from the inclined surface. When the ratchet 38 contacts the ratchet groove 39 driven by the inclined rectangular column 37, one end of the inclined rectangular column 37 is squeezed by the first trapezoidal block 35, so that the position of the inclined rectangular column 37 in the housing 2 is fixed at this time, so that the rotating shaft of the caster 1 is hindered, thereby achieving the purpose of limiting the rotation of the caster 1. One side of the caster 1 is provided with a ratchet The tooth 38 contacts the ratchet groove 39. When the user pushes the device to move under the action of the caster 1, the user can control the push plate 33 to move to the middle of the guide groove 32, so that the rectangular block 34 moves to the middle of the connecting cavity 31. During this process, the first trapezoidal block 35 squeezes the inclined rectangular column 37 to move linearly in the shell 2, so that the inclined rectangular column 37 drives the ratchet 38 to approach and contact the ratchet groove 39, so that the rotation axis of the caster 1 is hindered and cannot rotate normally in the shell 2, thereby limiting the movement of the caster 1 and fixing the device in place, which is beneficial for the user to use the brake mechanism 3 to fix the device in place during work.

[0029] When the user presses the push plate 33 to fix the caster 1 in the shell 2, the user needs to continue to press the push plate 33 to move in the lower half of the guide groove 32 to complete the release of the restriction on the caster 1, which is conducive to the user to conveniently control the positioning member 36 to achieve the purpose of controlling the caster 1. The positioning member 36 includes a slide groove 361 arranged on one side of the rectangular block 34, and a rectangular frame 362 sliding in the slide groove 361 is arranged in the rectangular block 34, a first spring 363 is arranged in the rectangular frame 362, and a second trapezoidal block 364 fixedly connected to the first spring 363 is slidingly arranged in the rectangular frame 362, a third trapezoidal block 365 contacting the second trapezoidal block 364 is arranged on the surface of the connecting cavity 31, and a reset member 366 for resetting the rectangular block 34 in the connecting cavity 31 is arranged on the surface of the connecting cavity 31. Since a second spring 310 fixedly connected to the rectangular block 34 is arranged on the top of the connecting cavity 31, when the user pushes the push plate 33 to make the rectangular block 34 move in the connecting cavity 31, the second The spring 310 is in a stretched state, and since the second trapezoidal block 364 is acted upon by the first spring 363, it has a certain length. When the second trapezoidal block 364 and the third trapezoidal block 365 contact and squeeze each other, the second trapezoidal block 364 compresses the first spring 363 and moves toward the inside of the rectangular frame 362, so that the second trapezoidal block 364 moves from the top to the bottom of the third trapezoidal block 365. The second trapezoidal block 364 is reset in the rectangular frame 362 under the action of the first spring 363, and the back of the second trapezoidal block 364 contacts the back of the third trapezoidal block 365, thereby blocking the reset of the rectangular block 34 in the connecting cavity 31. In this process, the first trapezoidal block 35 will squeeze the inclined rectangular column 37 to move, so that the ratchet 38 and the ratchet groove 39 are tightly squeezed and contacted, thereby limiting the rotation of the caster 1 in the shell 2, which is beneficial for the user to release the control of the push plate 33 when the user controls the push movement to a certain position. At this time, the purpose of limiting the caster 1 has been completed.

[0030] When the push rod moves to half the distance inside the guide slot 32, the user knows that the caster 1 is fixed. When it is necessary to release the restriction on the caster 1, the user will continue to press the push plate 33 to move it to the bottom of the guide slot 32. At this time, the control of the push plate 33 is released to achieve the purpose of releasing the restriction on the caster 1. The reset member 366 includes a triangular plate 1 3661 arranged directly below the third trapezoidal block 365, and a triangular plate 2 3662 is arranged on the top of the connecting cavity 31 and located above the side of the third trapezoidal block 365. Since the length of the rectangular frame 362 is only half the length of the slide slot 361, in the initial state, the rectangular frame 362 and the second trapezoidal block 364 are close to one end in the slide slot 361, and the second trapezoidal block 364 is located directly above the third trapezoidal block 365. When the second trapezoidal block 364 moves to the bottom of the third trapezoidal block 365 and continues to move, Since triangle plate 1 3661 and triangle plate 2 3662 are placed horizontally in the connecting cavity 31, when the second trapezoidal block 364 is squeezed with triangle plate 1 3661, the second trapezoidal block 364 is subjected to a lateral force, so that the second trapezoidal block 364 drives the rectangular frame 362 to slide in the slide groove 361 and close to the other end. At this time, the push plate 33 moves to and close to the other end of the guide groove 32, and under the action of the second spring 310, when the rectangular block 34 is pulled to perform a reset movement, the second trapezoidal block 364 will not contact the third trapezoidal block 365, and in this process, the second trapezoidal block 364 is again contacted and squeezed with triangle plate 2 3662, and the movement of the rectangular frame 362 in the slide groove 361 is repeated. At this time, the second trapezoidal block 364 is again located directly above the third trapezoidal block 365, which is beneficial for the user to control the push plate 33 to conveniently complete the restriction or release of the caster 1.

[0031] Example 2

[0032] When the push plate 33 moves in the lower half of the guide groove 32 and returns to the initial position in the guide groove 32, the position of the inclined rectangular column 37 does not change, and when the inclined rectangular column 37 is released from contact and extrusion with the first trapezoidal block 35, when the user pushes the device to move the caster 1, the ratchet groove 39 will squeeze the ratchet 38, so that the inclined rectangular column 37 moves into the shell 2, so that the ratchet groove 39 and the ratchet teeth 38 are separated, and the inclined rectangular column 37 will not completely reset in the shell 2, and will move in the shell 2 under the influence of factors such as gravity, which is not conducive to the caster 1 when the ratchet 38 contacts the ratchet groove 39, resulting in damage to the ratchet 38. On the basis of Example 1, Figure 5As shown, an iron sheet 311 is provided on the surface of the inclined rectangular column 37, and a magnet 312 magnetically connected to the iron sheet 311 is provided in the shell 2. When the user releases the restriction on the caster 1, the inclined rectangular column 37 is separated from the first trapezoidal block 35, and the ratchet 38 lacks the compression from the first trapezoidal block 35. When it is squeezed by the ratchet groove 39, it will be separated from the ratchet groove 39. After the iron sheet 311 and the magnet 312 are adsorbed, the inclined rectangular column 37 completes the reset movement in the shell 2, thereby reducing the damage to the ratchet 38 caused by the free movement of the inclined rectangular column 37 in the shell 2.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A caster brake, comprising a caster (1) and a housing (2) rotatably mounted on both sides of the caster (1), characterized in that: A braking mechanism (3) for limiting the rotation of the caster (1) is provided in the housing (2); The braking mechanism (3) comprises a connecting cavity (31) arranged in a shell (2), a guide groove (32) communicating with the connecting cavity (31) is arranged on the surface of the shell (2), and a push plate (33) sliding in the guide groove (32) and penetrating the shell (2) to the outside is arranged in the shell (2), a rectangular block (34) sliding in the connecting cavity (31) is arranged on one side of the push plate (33), a first trapezoidal block (35) is arranged on one side of the rectangular block (34), and a positioning member (36) for limiting the movement of the rectangular block (34) in the connecting cavity (31) is arranged on one side of the rectangular block (34), an inclined rectangular column (37) contacting the first trapezoidal block (35) is arranged penetrating in the shell (2), a ratchet (38) is arranged on the side of the inclined rectangular column (37) facing away from the inclined surface, and a ratchet groove (39) contacting the ratchet (38) is arranged on one side of the caster (1).

2. A caster brake according to claim 1, characterized in that: The positioning member (36) comprises a slide groove (361) arranged on one side of the rectangular block (34), and a rectangular frame (362) sliding in the slide groove (361) is arranged in the rectangular block (34), a first spring (363) is arranged in the rectangular frame (362), and a second trapezoidal block (364) fixedly connected to the first spring (363) is slidably arranged in the rectangular frame (362), a third trapezoidal block (365) in contact with the second trapezoidal block (364) is arranged on the surface of the connecting cavity (31), and a reset member (366) for resetting the rectangular block (34) in the connecting cavity (31) is arranged on the surface of the connecting cavity (31).

3. A caster brake according to claim 1, characterized in that: A second spring (310) fixedly connected to the rectangular block (34) is provided at the top of the connection cavity (31).

4. A caster brake according to claim 2, characterized in that: The length of the rectangular frame (362) is only half the length of the slide groove (361).

5. A caster brake according to claim 2, characterized in that: The reset member (366) comprises a triangular plate 1 (3661) arranged directly below the third trapezoidal block (365), and a triangular plate 2 (3662) located above the third trapezoidal block (365) is arranged at the top of the connection cavity (31).

6. The caster brake according to claim 1, characterized in that: An iron sheet (311) is provided on the surface of the inclined rectangular column (37), and a magnet (312) magnetically connected to the iron sheet (311) is provided in the housing (2).

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