A brake and friction belt resetting device thereof

Abstract

The present invention discloses a brake and a friction band reset device thereof. The friction band reset device comprises an elastic tensioner, a movable connection assembly, a connecting rod and an adjusting frame. One end of the elastic tensioner is used to be detachably fixed to a first friction band on one side, and the other end is detachably fixed to the connecting rod. The connecting rod is movably connected to a second friction band on the other side through the movable connection assembly. One end of the adjusting frame is rotatably connected to the connecting rod, and the other end is used to be detachably fixed to the second friction band. By pushing the adjusting frame, the connecting rod moves in a direction close to the first friction band, so that the elastic tensioner can be disassembled and assembled. The above-mentioned friction band reset device can be disassembled and assembled under the premise that the elastic tensioner is in a state of small pre-tightening force or no pre-tightening force, thereby improving the convenience of disassembly and assembly of the elastic tensioner. At the same time, whether it is a single or multiple elastic tensioners, it can be directly disassembled and assembled by manpower without the use of tools, further improving the convenience of disassembly and assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of brakes, and in particular to a friction belt resetting device. The present invention also relates to a brake having the friction belt resetting device. Background Art

[0002] The internal tension brake is installed in the brake drum. Its working principle is to control the tension and reset of the friction belt to achieve brake clutch. When the friction belt is tensioned, the brake is applied, and when the friction belt is reset, the brake is released.

[0003] In the prior art, the friction belt reset is realized by a friction belt reset device, which is directly connected and fixed to the friction belt through a single or multiple tension springs, that is, the two ends of the tension springs are respectively connected to the friction belt with ear holes, wherein the single or multiple tension springs are only related to the preload and reset force. Since the friction belt reset needs to rely on the preload of the tension spring, the tension spring needs to be adjusted and replaced regularly due to load work and frequent operations. However, since the tension spring is directly connected and fixedly installed on the friction belt, the preload of the tension spring cannot be adjusted before installation; secondly, the tension spring with preload is particularly difficult to install. If it is a single tension spring, when the preload is high, certain tools are required to install it. If it is multiple tension springs (generally two are commonly used), it can be directly installed manually because the preload becomes small, but considering the tension balance problem, the tension springs must be evenly distributed. At this time, the tension spring close to the inner side of the brake drum becomes extremely difficult to install due to limited space during installation. Due to the above reasons, users may abandon installing the innermost tension spring when replacing the tension spring, which will eventually cause uneven force on the friction belt and severe wear, thereby affecting the braking effect.

[0004] Therefore, how to avoid the difficulty in disassembling and assembling the tension spring with pre-tightening force is a technical problem that those skilled in the art need to solve at present. Summary of the invention

[0005] The object of the present invention is to provide a friction band reset device, which can be disassembled and assembled under the premise that the elastic tensioning member is in a state of small pre-tightening force or no pre-tightening force, thereby improving the convenience of disassembly and assembly of the elastic tensioning member. Another object of the present invention is to provide a brake including the above-mentioned friction band reset device.

[0006] To achieve the above-mentioned purpose, the present invention provides a friction belt resetting device, including an elastic tensioning member, a movable connection assembly, a connecting rod and an adjustment frame, one end of the elastic tensioning member is used to be detachably fixed to a first friction belt on one side, and the other end is detachably fixed to the connecting rod, and the connecting rod is movably connected to a second friction belt on the other side through the movable connection assembly, one end of the adjustment frame is rotatably connected to the connecting rod, and the other end is used to be detachably fixed to the second friction belt; by pushing the adjustment frame, the connecting rod moves in a direction close to the first friction belt to allow the elastic tensioning member to be disassembled and assembled.

[0007] Optionally, the movable connection assembly includes an articulated shaft and a connecting block, the articulated shaft is articulated to the second friction belt through two articulated seats, the articulated shaft is arranged parallel to the connecting rod, one end of the connecting block is rotatably connected to the articulated shaft, and the other end is rotatably connected to the connecting rod.

[0008] Optionally, the adjustment frame includes a fork frame and a positioning rod, one end of the fork frame away from the positioning rod is rotatably connected to the connecting rod, and the positioning rod is used to be fixed to the second friction belt after the elastic tensioning member reaches a preset pre-tightening force.

[0009] Optionally, the fork frame is specifically a U-shaped fork frame.

[0010] Optionally, the positioning rod is specifically a screw rod, and further includes a nut assembly which is threadably connected to the screw rod and is used to fix the screw rod to the ear plate at the bottom of the second friction belt.

[0011] Optionally, the nut assembly includes an adjusting nut screwed to the screw thread for adjusting the preload force of the elastic tensioner, and a locking nut screwed to the screw thread for locking the screw after the elastic tensioner reaches a preset preload force.

[0012] Optionally, the number of the elastic tensioning members is two, and the two elastic tensioning members are symmetrically distributed about the axis of the adjustment frame.

[0013] Optionally, the elastic tensioning member is specifically a tensioning spring.

[0014] Optionally, it further comprises a fixing rod which is used for fixing to the first friction belt and for fixing the elastic tensioning member, and the fixing rod is arranged parallel to the connecting rod.

[0015] The present invention also provides a brake, comprising any one of the friction belt resetting devices described above.

[0016] Compared with the above background technology, the friction belt reset device provided by the embodiment of the present invention includes an elastic tensioning member, a movable connection assembly, a connecting rod and an adjustment frame, wherein one end of the elastic tensioning member is detachably fixed to the first friction belt on one side, the other end of the elastic tensioning member is detachably fixed to the connecting rod, the connecting rod is movably connected to the second friction belt on the other side through the movable connection assembly, one end of the adjustment frame is rotatably connected to the connecting rod, and the other end of the adjustment frame is detachably fixed to the second friction belt. In this way, before installation, by pushing the adjustment frame, the connecting rod can move in a direction close to the first friction belt through the movable connection assembly for the installation of the elastic tensioning member; during installation, the elastic tensioning member can be installed on the connecting rod in a state without pre-tightening force, that is, when the elastic tensioning member is installed on the connecting rod, the elastic tensioning member is at a free length; after installation, by pulling the adjustment frame, the connecting rod moves in a direction away from the first friction belt, and at the same time, the tensile pre-tightening force of the elastic tensioning member increases, and when the tensile pre-tightening force of the elastic tensioning member reaches the preset pre-tightening force, the adjustment frame is fixed to the second friction belt. Compared with the traditional elastic tensioning parts which are difficult to disassemble and assemble under the action of pre-tightening force, the friction belt resetting device provided in the embodiment of the present invention can be disassembled and assembled when the elastic tensioning parts are in a state of small pre-tightening force or no pre-tightening force, thereby improving the convenience of disassembly and assembly of the elastic tensioning parts; at the same time, whether it is a single or multiple elastic tensioning parts, it can be directly disassembled and assembled by manpower without the use of tools, further improving the convenience of disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a friction belt resetting device provided by an embodiment of the present invention;

[0019] Figure 2 for Figure 1 Structural diagram from perspective A;

[0020] Figure 3 It is a schematic diagram of the structure when the elastic tensioning member is installed;

[0021] Figure 4 This is a schematic diagram of the structure after the elastic tensioning member is installed.

[0022] in:

[0023] 01-first friction belt, 02-second friction belt, 1-elastic tensioner, 2-movable connection assembly, 21-hinge shaft, 22-connecting block, 3-connecting rod, 4-adjusting frame, 41-fork frame, 42-positioning rod, 5-adjusting nut, 6-locking nut. DETAILED DESCRIPTION

[0024] The following will be combined with the 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 described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The core of the present invention is to provide a friction belt reset device, which can be disassembled and assembled under the premise that the elastic tensioning member is in a state of small pre-tightening force or no pre-tightening force, thereby improving the convenience of disassembly and assembly of the elastic tensioning member. Another core of the present invention is to provide a brake including the above-mentioned friction belt reset device.

[0026] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] It should be noted that the directional words such as "upper end, lower end, left side, right side" described below are all defined based on the drawings in the specification.

[0028] Please refer to Figures 1 to 4 , Figure 1 A schematic diagram of the structure of a friction belt resetting device provided by an embodiment of the present invention; Figure 2 for Figure 1 Structural diagram from perspective A; Figure 3 It is a schematic diagram of the structure when the elastic tensioning member is installed; Figure 4 This is a schematic diagram of the structure after the elastic tensioning member is installed.

[0029] The friction belt resetting device provided in an embodiment of the present invention includes an elastic tensioning member 1, a movable connection component 2, a connecting rod 3 and an adjusting frame 4, wherein one end of the elastic tensioning member 1 is detachably fixed to the first friction belt 01 on one side, the other end of the elastic tensioning member 1 is detachably fixed to the connecting rod 3, the connecting rod 3 is movably connected to the second friction belt 02 on the other side through the movable connection component 2, one end of the adjusting frame 4 is rotatably connected to the connecting rod 3, and the other end of the adjusting frame 4 is detachably fixed to the second friction belt 02.

[0030] It should be noted that the first friction belt 01 and the second friction belt 02 are respectively located on the left and right sides, and the two ends of the elastic tensioner 1 are respectively detachably connected to the lower position of the first friction belt 01 and the lower position of the second friction belt 02. The resetting of the first friction belt 01 and the second friction belt 02 needs to be achieved by the pre-tension (pre-tensioning force) of the elastic tensioner 1.

[0031] In this way, before installation, by pushing the adjustment frame 4, the connecting rod 3 can move in the direction close to the first friction band 01 through the movable connection component 2 to facilitate the installation of the elastic tensioning member 1; during installation, the elastic tensioning member 1 can be installed on the connecting rod 3 in a state without pre-tightening force, that is, when the elastic tensioning member 1 is installed on the connecting rod 3, the elastic tensioning member 1 is at a free length; after installation, by pulling the adjustment frame 4, the connecting rod 3 moves in the direction away from the first friction band 01, and at the same time, the tensile pre-tightening force of the elastic tensioning member 1 increases. When the tensile pre-tightening force of the elastic tensioning member 1 reaches the preset pre-tightening force, the adjustment frame 4 is fixed to the second friction band 02.

[0032] Compared with the traditional method that is difficult to disassemble and assemble the elastic tensioning member 1 under the action of pre-tightening force, the friction belt resetting device provided in the embodiment of the present invention can be disassembled and assembled when the elastic tensioning member 1 is in a state of small pre-tightening force or no pre-tightening force, thereby improving the convenience of disassembly and assembly of the elastic tensioning member 1; at the same time, whether it is a single or multiple elastic tensioning members 1, manual disassembly and assembly can be directly adopted without the use of tools, thereby further improving the convenience of disassembly and assembly.

[0033] In order to improve the stability of the friction belt resetting device, the number of the elastic tensioning members 1 is set to two, and the two elastic tensioning members 1 are symmetrically distributed about the axis of the adjustment frame 4 .

[0034] Of course, according to actual needs, the elastic tensioning member 1 is specifically a tensioning spring. Further, the friction belt resetting device also includes a fixing rod, which is fixed to the first friction belt 01 and is used for fixing the elastic tensioning member 1 , and the fixing rod is arranged parallel to the connecting rod 3 .

[0035] That is to say, the left and right ends of any tension spring are respectively fixed to the fixing rod and the connecting rod 3, and the axis direction of any tension spring is perpendicular to the axis direction of the fixing rod. In this way, when the adjustment frame 4 pulls the two tension springs, it can be ensured that the tension springs are evenly stressed.

[0036] As a specific embodiment, in order to facilitate the movable connection of the connecting rod 3, the above-mentioned movable connection component 2 includes an articulated shaft 21 and a connecting block 22. The articulated shaft 21 is fixedly connected to the second friction belt 02 through two connecting seats. The articulated shaft 21 is arranged parallel to the connecting rod 3. One end of the connecting block 22 is rotatably connected to the articulated shaft 21, and the other end is rotatably connected to the connecting rod 3.

[0037] That is to say, the connecting block 22 serves as a "connecting rod" connecting the connecting rod 3 and the articulated shaft 21, and the connecting block 22 can rotate freely around the axis of the articulated shaft 21 to adjust the position of the connecting rod 3; the articulated shaft 21 is hinged to the articulated seat of the first friction belt 01 to ensure the flexible rotation of the connecting block 22. In this way, when the adjustment frame 4 drives the connecting rod 3 to move, the stability of the movement of the connecting rod 3 relative to the second friction belt 02 can be guaranteed.

[0038] As another specific embodiment, the movable connection assembly 2 described above can also be configured as a slide rail mechanism fixed to the bottom of the second friction belt 02, and the slide rail mechanism is provided with a slide groove for the connecting rod 3 to slide, for example, two slide grooves arranged opposite to each other can be provided, and two slide grooves are extended from both ends of the connecting rod 3, and the connecting rod 3 is slid in the direction close to the first friction belt 01 by pushing the adjustment frame 4, so as to facilitate the disassembly and assembly of the elastic tensioning member 1. Of course, the length of the slide groove can be adjusted according to the disassembly and assembly needs of the elastic tensioning member 1, and the slide groove includes but is not limited to all shapes that are conducive to the sliding back and forth of the connecting rod 3, such as rectangle and arc.

[0039] On the basis of the above, the adjustment frame 4 includes a fork frame 41 and a positioning rod 42. The end of the fork frame 41 away from the positioning rod 42 is rotatably connected to the connecting rod 3. The positioning rod 42 is used to be fixed to the second friction belt 02 after the elastic tensioning member 1 reaches a preset preload.

[0040] Specifically, the fork frame 41 is a U-shaped fork frame. The ends of the two arms of the U-shaped fork frame are provided with through holes for the connecting rod 3 to pass through, and the inner diameter of the through hole is slightly larger than the diameter of the connecting rod 3, so that the fork frame 41 can rotate relative to the connecting rod 3; the positioning rod 42 is a screw rod, and further includes a nut assembly screwed with the screw rod thread, and the nut assembly is used to fix the screw rod to the ear plate at the bottom of the second friction belt 02.

[0041] The reset function of the friction belt reset device directly affects the braking effect of the brake. The elastic tensioning member 1 of the friction belt reset device will have a certain preload in both normal and working conditions, which can ensure the stable operation of the friction belt reset device. According to the braking force required by the internal tension brake, the preload of the installed elastic tensioning member 1 is also different. The greater the braking force, the greater the preload. Obviously, if the reset preload is small, the reset tension is small, and the friction belt may not be completely loosened. At this time, dry grinding will occur, which will eventually accelerate the wear of the friction belt; if the reset preload is large, the reset tension is large, and a greater braking force is required when the friction belt is braked. In this way, more braking force is required to overcome the reset tension under the same braking force, which will eventually weaken the braking effect due to the reduction of the braking force used for braking. Therefore, making the preload of the elastic tensioning member 1 adjustable can use the best preload according to the actual situation, so as to ensure that the mechanism is in the best working state. Of course, fine-tuning can be performed later according to the wear of the friction belt, which can also extend the service life to a certain extent.

[0042] Furthermore, in order to achieve the purpose of adjustable preload force of the elastic tensioner 1, the nut assembly includes an adjusting nut 5 and a locking nut 6. The locking nut 6 is arranged on the side of the adjusting nut 5 away from the first friction band 01. The adjusting nut 5 is screwed to the screw thread. The adjusting nut 5 is used to adjust the preload force of the elastic tensioner 1. The locking nut 6 is screwed to the screw thread. The locking nut 6 is used to lock the screw after the elastic tensioner 1 reaches the preset preload force.

[0043] In this way, before installation, first loosen the locking nut 6, then remove the locking nut 6 and the adjusting nut 5 successively, push the adjusting frame 4 to rotate the connecting block 22 around the hinge shaft 21 to the left preset position, and then install the elastic tensioning member 1 on the connecting rod 3. At this time, the elastic tensioning member 1 is free length and has no pre-tightening force; after installation, pull the adjusting frame 4 to drive the connecting block 22 to rotate around the hinge shaft 21 to the right preset position, and at the same time, the tensile pre-tightening force of the elastic tensioning member 1 increases. It should be noted that when pulling the adjusting frame 4, the pre-tightening force of the elastic tensioning member 1 can be adjusted by adjusting the nut 5 until the required pre-tightening force is adjusted, and the screw is locked to the ear plate at the bottom of the second friction belt 02 by the locking nut 6.

[0044] It should be noted that the elastic tensioning member 1 is adjusted to a corresponding preload after installation, which can solve the problem of the preload being unadjustable, and the preload of the elastic tensioning member 1 can also be adjusted during later use. The preload of the elastic tensioning member 1 is adjustable, and the optimal preload can be used according to actual conditions, thereby ensuring that the friction belt reset device is in the optimal working state.

[0045] The present invention provides a brake, including the friction belt resetting device described in the above specific embodiment; other parts of the brake can refer to the prior art and will not be elaborated in this article.

[0046] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0047] The brake and friction band reset device provided by the present invention are introduced in detail above. The principle and implementation method of the present invention are described in detail using specific examples. The description of the above embodiments is only used to help understand the scheme and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A friction belt resetting device, characterized in that: It comprises an elastic tensioning member (1), a movable connection assembly (2), a connecting rod (3) and an adjusting frame (4); one end of the elastic tensioning member (1) is used for being detachably fixed to a first friction belt (01) on one side, and the other end is detachably fixed to the connecting rod (3); the connecting rod (3) is movably connected to a second friction belt (02) on the other side through the movable connection assembly (2); one end of the adjusting frame (4) is rotatably connected to the connecting rod (3), and the other end is used for being detachably fixed to the second friction belt (02); by pushing the adjusting frame (4), the connecting rod (3) moves in a direction close to the first friction belt (01), so that the elastic tensioning member (1) can be disassembled and assembled; The movable connection assembly (2) comprises an articulated shaft (21) and a connecting block (22); the articulated shaft (21) is articulated with the second friction belt (02) via two articulated seats; the articulated shaft (21) is arranged parallel to the connecting rod (3); one end of the connecting block (22) is rotatably connected to the articulated shaft (21), and the other end is rotatably connected to the connecting rod (3); The adjustment frame (4) comprises a fork frame (41) and a positioning rod (42), wherein one end of the fork frame (41) away from the positioning rod (42) is rotatably connected to the connecting rod (3), and the positioning rod (42) is used to be fixed to the second friction belt (02) after the elastic tensioning member (1) reaches a preset pre-tightening force.

2. The friction belt resetting device according to claim 1, characterized in that: The fork frame (41) is specifically a U-shaped fork frame.

3. The friction belt resetting device according to claim 1, characterized in that: The positioning rod (42) is specifically a screw rod, and also includes a nut assembly which is threadedly connected to the screw rod and is used to fix the screw rod to the ear plate at the bottom of the second friction belt (02).

4. The friction belt resetting device according to claim 3, characterized in that: The nut assembly comprises an adjusting nut (5) screwed to the thread of the screw rod for adjusting the preload force of the elastic tensioning member (1), and a locking nut (6) screwed to the thread of the screw rod for locking the screw rod after the elastic tensioning member (1) reaches a preset preload force.

5. The friction belt resetting device according to any one of claims 1 to 4, characterized in that: The number of the elastic tensioning members (1) is two, and the two elastic tensioning members (1) are symmetrically distributed about the axis of the adjustment frame (4).

6. The friction belt resetting device according to claim 5, characterized in that: The elastic tensioning member (1) is specifically a tensioning spring.

7. The friction belt resetting device according to claim 5, characterized in that: It also comprises a fixing rod which is used for fixing to the first friction belt (01) and for fixing the elastic tensioning member (1), and the fixing rod is arranged in parallel with the connecting rod (3).

8. A brake, characterized in that: It comprises a friction belt resetting device as described in any one of claims 1 to 7.

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