Double-pressure-spring type brake device of operation trolley

Abstract

The invention belongs to chemical fiber machinery, and particularly relates to a double pressure spring type brake device of an operation trolley, which is arranged on a rack of the operation trolley and comprises a hand brake assembly, one end of the hand brake assembly is connected with a brake cable, and the lower end of the brake cable is connected with a reset spring and a pressure relief spring. The top end of the reset spring abuts against the side wall of the brake mounting plate, the lower end of the brake cable is further provided with a cable clamping screw and a locking nut, and the locking nut abuts against the bottom end of the pressure buffering spring. A brake plate is arranged between the reset spring and the pressure buffering spring, one end of the brake plate abuts against a directional wheel of the operation trolley, and the middle of the brake plate is connected with one end of a brake mounting plate through a brake plate mounting column. A metal connecting plate and a metal brake rod in an existing brake device are replaced with the brake cable, the manufacturing cost of the double-pressure-spring type brake device and the weight of an operation trolley are greatly reduced, and a worker can move the operation trolley more conveniently.

Description

Technical Field

[0001] This invention belongs to the field of chemical fiber machinery, and specifically relates to a double-compression spring brake device for operating a trolley. Background Technology

[0002] Currently, the braking device for the chemical fiber machinery operating trolley consists of a metal handle, connecting plate, pin, brake lever, retaining ring, compression spring, and brake plate. When the metal handle is lifted, it presses down the connecting plate, which in turn presses down the brake lever. The brake lever then moves the brake plate downwards, causing it to contact the trolley's directional wheel, preventing the wheel from moving. Pressing down the metal handle pulls the connecting plate and brake lever upwards, causing the brake lever to separate the brake plate from the directional wheel, thus releasing the wheel's movement. However, because this braking device connects the metal handle and brake plate via a metal connecting plate and brake lever, it not only increases the manufacturing cost but also adds to the weight of the operating trolley. This makes moving the trolley more strenuous for operators, increasing their workload and making movement less convenient. The trolley's weight also negatively impacts its maneuverability and user experience. Summary of the Invention

[0003] The purpose of this invention is to provide a double-compression spring brake device for operating a trolley, which can reduce the weight of the trolley and ensure that the trolley can be moved more conveniently.

[0004] The technical solution of the present invention is as follows: a double-spring brake device for operating a trolley, mounted on the frame of the trolley, the double-spring brake device includes a handbrake assembly, which is mounted on the frame via a handbrake mounting plate. A brake mounting plate is connected to one side of the bottom of the frame. One end of the handbrake assembly is connected to a brake cable, the lower end of which passes through the brake mounting plate and extends to the directional wheel at the bottom of the trolley. A return spring and a relief spring are connected to the lower end of the brake cable, which are distributed vertically and sleeved on the outside of the brake cable. The top end of the return spring abuts against the side wall of the brake mounting plate. A clamping screw is also provided at the lower end of the brake cable, and a locking nut is connected to the clamping screw. The locking nut abuts against the bottom end of the relief spring. A brake plate is provided between the return spring and the relief spring, which is sleeved on the outside of the brake cable. One end of the brake plate abuts against the directional wheel of the trolley, and the middle part of the brake plate is connected to one end of the brake mounting plate via a brake plate mounting post.

[0005] Preferably, the handbrake assembly includes a handbrake handle and a ratchet mounting plate. One side of the ratchet mounting plate is bolted to the handbrake mounting plate, and the top of the ratchet mounting plate has several ratchet teeth arranged in an arc. The handbrake handle includes an integrally formed handle portion and a connecting portion. The connecting portion is located at the bottom of the handle portion and is L-shaped. An abutment plate is provided inside the connecting portion and is located at the end of the connecting portion connected to the handle portion. The middle part of the connecting portion is rotatably connected to the middle part of the ratchet mounting plate, and the other end of the connecting portion is connected to the brake cable. One end of the handle portion has a handle button, and a push rod is connected inside the handle portion. The top of the push rod is connected to the handle button, and a handbrake spring is sleeved on the outside of the push rod. The top of the handbrake spring is connected to the push rod, and the bottom end of the handbrake spring abuts against the abutment plate. The bottom end of the push rod passes through the abutment plate and extends into the interior of the connecting portion. A pawl is rotatably connected to the bottom end of the push rod. One end of the pawl engages between two adjacent ratchet teeth, and the middle part of the pawl is rotatably connected to the side wall of the connecting portion.

[0006] Preferably, the brake cable is fitted with a conduit, the top end of which is connected to the handbrake mounting plate, and the bottom end of which is connected to the brake mounting plate.

[0007] Preferably, the top end of the brake mounting plate is installed on the lower part of the frame of the operating trolley, and the top end of the brake mounting plate is provided with a bent part integrally formed therewith. The lower surface of the bent part abuts against the top end of the return spring. One end of the bent part is connected to the conduit, and the brake line inside the conduit is slidably connected to the bent part. The bottom end of the brake mounting plate is rotatably connected to the brake plate mounting post.

[0008] Preferably, the spring constant of the return spring is less than that of the pressure relief spring.

[0009] The beneficial effects of this invention are as follows: by replacing the metal connecting plate and brake lever in the existing brake device with a brake cable, the manufacturing cost of the double-spring brake device and the weight of the operating trolley are greatly reduced, making it easier for operators to move the operating trolley and reducing their labor intensity; at the same time, by compressing the buffer spring, the pawl cannot be rotated out from between the two ratchet teeth by the push rod alone, thus preventing the brake plate from being unable to release the restriction on the directional wheel. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the existing technology; Figure 2 This is a schematic diagram of the installation state of the present invention; Figure 3 This is a schematic diagram of the overall structure of the present invention; Figure 4 This is a side view of the overall structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the handbrake assembly of the present invention; Figure 6 This is a schematic diagram of the structure of the reset spring and the pressure relief spring of the present invention. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0014] like Figure 1As shown, the braking device 7 of the current chemical fiber machinery operating trolley consists of a metal handle 71, a connecting plate 72, a pin 73, a brake lever 74, a retaining ring 75, a compression spring 76, and a brake plate 77. Specifically, the brake lever 74 is slidably connected to the operating trolley 1, and a retaining ring 75 is provided at the lower part of the brake lever 74. A compression spring 76 is connected between the retaining ring 75 and the bottom of the operating trolley 1. The bottom end of the brake lever 74 is connected to the brake plate 77, and the top of the brake lever 74 is rotatably connected to the connecting plate 72 through the pin 73. The top of the connecting plate 72 is rotatably connected to the metal handle 71, and the metal handle 71 is rotatably connected to the operating trolley 1. When the metal handle 71 is raised, the metal handle 71 rotates around the point where it is connected to the operating trolley 1. At this time, the metal handle 71 rotatably connects its end to the connecting plate 72. When the connecting plate 72 is pressed down, it presses down on the brake lever 74. The brake lever 74 drives the brake plate 77 to move downward, so that the brake plate 77 abuts against the directional wheel 12 of the operating trolley 1, ensuring that the directional wheel 12 cannot move. At the same time, by pressing down on the metal handle 71, the metal handle 71 pulls the connecting plate 72 and the brake lever 74 upward, thereby causing the brake lever 74 to separate the brake plate 77 from the directional wheel 12, releasing the restriction on the directional wheel 12. At this time, the operating trolley 1 can be moved. Since the metal handle 71 and the brake plate 77 are connected by the metal connecting plate 72 and the brake lever 72 on the braking device 7, it not only increases the manufacturing cost of the braking device 7, but also increases the weight of the operating trolley 1, making it more strenuous for the operator to move the operating trolley 1 and increasing the labor intensity of the operator.

[0015] like Figure 2-6 As shown, a double-spring brake device for an operating trolley is mounted on the frame 11 of the operating trolley 1. The double-spring brake device includes a handbrake assembly 2, which is mounted on the frame 11 via a handbrake mounting plate 3. A brake mounting plate 4 is connected to one side of the bottom of the frame 11. One end of the handbrake assembly 2 is connected to a brake cable 5, the lower end of which passes through the brake mounting plate 4 and extends to the directional wheel 12 at the bottom of the operating trolley 1. A return spring 51 and a pressure-relieving spring 52 are connected to the lower end of the brake cable 5. 2. The upper and lower parts are distributed and sleeved on the outside of the brake line 5. The top of the return spring 51 abuts against the side wall of the brake mounting plate 4. The lower end of the brake line 5 is also provided with a clamping screw 53. A locking nut 54 is connected to the clamping screw 53. The locking nut 54 abuts against the bottom end of the pressure relief spring 52. A brake plate 6 is provided between the return spring 51 and the pressure relief spring 52. The brake plate 6 is sleeved on the outside of the brake line 5. One end of the brake plate 6 abuts against the directional wheel 12 of the operating trolley 1. The middle part of the brake plate 6 is connected to one end of the brake mounting plate 3 through the brake plate mounting post 61.

[0016] Among them, such as Figure 2-4As shown, a conduit 55 is sleeved on the outside of the brake cable 5. The top end of the conduit 55 is connected to the handbrake mounting plate 3, and the bottom end of the conduit 55 is connected to the brake mounting plate 4. The conduit 55 protects the brake cable 5 inside and ensures that the braking force is effectively transmitted.

[0017] Furthermore, the elastic coefficient of the return spring 51 is less than that of the decompression spring 52. As the brake cable 5 gradually moves upward, the brake cable 5 pulls the clamping screw 53 and the locking nut 54 at its bottom to move upward. The clamping screw 53 and the locking nut 54 move upward and compress the return spring 51 until the return spring 51 can no longer be compressed. Only when the clamping screw 53 and the locking nut 54 continue to move upward will the decompression spring 52 begin to compress.

[0018] Based on the above embodiments, in the initial state, the brake plate 6 is separated from the directional wheel 12 of the operating trolley 1, and the operating trolley 1 can move; the handbrake assembly 2 is lifted, and the handbrake assembly 2 pulls the brake cable 5. The brake cable 5 pulls the clamping screw 53 and locking nut 54 at its bottom to move upward. When the clamping screw 53 and locking nut 54 move upward, they push the buffer spring 52 and one end of the brake plate 6 to move upward, causing the brake plate 6 to rotate around the brake plate mounting post 61. At this time, one end of the brake plate 6 gradually moves upward and compresses the return spring 51, while the other end of the brake plate 6 gradually... The brake plate 6 moves down to abut against the directional wheel 12 of the operating trolley 1, and restricts the directional wheel 12 by the brake plate 6 to ensure that the operating trolley 1 cannot move. When the handbrake assembly 2 is pressed down, the clamping screw 53 and locking nut 54 at the bottom of the brake cable 5 move down under the action of the buffer spring 52 and the return spring 51. At the same time, under the action of the return spring 51, the brake plate 6 rotates around the brake plate mounting post 61, so that one end of the brake plate 6 gradually moves up and separates from the directional wheel 12, releasing the restriction on the directional wheel 12. At this time, the operating trolley 1 can be moved.

[0019] In this embodiment, as Figure 4-6As shown, the handbrake assembly 2 includes a handbrake handle 21 and a ratchet mounting plate 22. One side of the ratchet mounting plate 22 is bolted to the handbrake mounting plate 3. The top of the ratchet mounting plate 22 has several ratchet teeth 221 arranged in an arc shape. The handbrake handle 21 includes an integrally formed handle portion 211 and a connecting portion 212. The connecting portion 212 is located at the bottom end of the handle portion 211. The connecting portion 212 is generally L-shaped. An abutment plate 213 is provided inside the connecting portion 212. The abutment plate 213 is located at the end of the connecting portion 212 connected to the handle portion 211. The middle part of the connecting portion 212 is rotatably connected to the middle part of the ratchet mounting plate 22. The other end of the connecting portion 212... It is connected to the brake cable 5; one end of the handle part 211 is provided with a handle button 214, and a push rod 215 is connected inside the handle part 211. The top end of the push rod 215 is connected to the handle button 214. A handbrake spring 216 is sleeved on the outside of the push rod 215. The top end of the handbrake spring 216 is connected to the push rod 215, and the bottom end of the handbrake spring 216 abuts against the abutment plate 213. The bottom end of the push rod 215 passes through the abutment plate 213 and extends into the interior of the connecting part 212. A pawl 217 is rotatably connected to the bottom end of the push rod 215. One end of the pawl 217 is engaged between two adjacent ratchet teeth 221, and the middle part of the pawl 217 is rotatably connected to the side wall of the connecting part 212.

[0020] Based on the above embodiments, by pressing the handle button 214, the handle button 214 drives the push rod 215 to move, simultaneously compressing the handbrake spring 216. One end of the push rod 215 pushes the pawl 217, causing the pawl 217 to rotate around its connection with the connecting part 212, thereby moving the pawl 217 out of the two ratchet teeth 221. At this time, the handbrake handle 21 can be raised or lowered. Releasing the handle button 214 causes the push rod 215 to return to its original position under the action of the handbrake spring 216. Simultaneously, the push rod 215 pulls the pawl 217, causing the pawl 217 to re-engage between the two adjacent ratchet teeth 221. Holding the handle part 211 of the handbrake handle 21 and raising the handbrake handle 21 causes the connecting part 212 of the handbrake handle 21 to rotate around its connection with the ratchet. When the mounting plate 22 is rotated, the end of the connecting part 212 connected to the brake cable 5 gradually rotates upward, and the connecting part 212 pulls the brake cable 5 to move upward gradually. Multiple ratchet teeth 221 can provide different braking forces to the directional wheel 12. In the initial position, the end of the connecting part 212 connected to the brake cable 5 is placed horizontally, and the brake plate 6 is not in contact with the directional wheel 12. As the handbrake handle 21 is raised, the end of the connecting part 212 connected to the brake cable 5 gradually rises until the pawl 217 is engaged between the two ratchet teeth 221 located at the end of the ratchet mounting plate 22. These two ratchet teeth 221 are located at the outermost end of the ratchet teeth 221. At this time, the brake plate 6 provides the directional wheel 12 with the maximum braking force.

[0021] Furthermore, when the pawl 217 is engaged between the two ratchet teeth 221 located at the end of the ratchet mounting plate 22, when the restriction on the guide wheel 12 is released, because one end of the brake plate 6 is completely abutting against the guide wheel 12, the brake plate 6 cannot rotate, causing the brake plate 6 to be unable to continue compressing the return spring 51; at this time, pressing the handle button 214 causes the handle button 214 to push the push rod 215 and the pawl 217, thereby causing the pawl 217 to move out from between the two ratchet teeth 221, lifting the handbrake handle 21, causing the connecting part 212 of the handbrake handle 21 to pull the brake cable 5 to continue moving upward, thereby causing the clamping screw 53 and the locking nut 54 at the bottom of the brake cable 5 to move upward and compress the buffer spring 52; during the upward movement of the handbrake handle 21, When the pawl 217 is completely removed from between the two adjacent ratchet teeth 221, pressing down the handbrake handle 21 makes it easier to rotate the end of the connecting part 212 connected to the brake cable 5 downwards. Under the action of the buffer spring 52 and the return spring 51, the brake plate 6 is separated from the guide wheel 12, releasing the restriction on the guide wheel 12. The buffer spring 52 ensures that the handbrake handle 21 can drive the pawl 217 and the brake cable 5 to continue moving upwards, so that the pawl 217 is removed from between the two ratchet teeth 221 located at the outermost ends of the ratchet teeth 221. By compressing the buffer spring 52, it is prevented that the push rod 215 alone cannot rotate the pawl 217 from between the two ratchet teeth 221, thus preventing the brake plate 6 from being unable to release the restriction on the guide wheel 12.

[0022] In this embodiment, as Figure 2-6 As shown, the top of the brake mounting plate 4 is installed on the lower part of the frame 11 of the operating trolley 1. The top of the brake mounting plate 4 is provided with a bent part 41 integrally formed therewith. The lower surface of the bent part 41 abuts against the top of the return spring 51. One end of the bent part 41 is connected to the conduit 55, and the brake line 5 inside the conduit 55 is slidably connected to the bent part 41. The bottom end of the brake mounting plate 4 is rotatably connected to the brake plate mounting post 61.

[0023] Based on the above embodiments, by replacing the metal connecting plate 72 and brake lever 72 in the existing brake device 7 with brake line 5, the manufacturing cost of the double spring brake device is greatly reduced, and the weight of the operating trolley 1 is also reduced, making it easier for the staff to move the operating trolley 1 and reducing the labor intensity of the staff.

[0024] The working principle of this invention is as follows: Pressing the handle button 214 causes the handle button 214 to push the push rod 215 and the pawl 217, causing the pawl 217 to rotate around its connection with the connecting part 212; lifting the handbrake handle 21 causes the connecting part 212 of the handbrake handle 21 to rotate around its connection with the ratchet mounting plate 22. At this time, one end of the connecting part 212 pulls the brake cable 5 to gradually move upward. The brake cable 5 pulls the clamping screw 53 and the locking nut 54 upward. When the clamping screw 53 and the locking nut 54 move upward, they push the slow... The spring 52 moves upward and one end of the brake plate 6 moves upward, causing the brake plate 6 to rotate around the brake plate mounting post 61. At this time, one end of the brake plate 6 gradually moves upward to compress the return spring 51, and the other end of the brake plate 6 gradually moves downward to abut against the directional wheel 12 of the operating trolley 1. The brake plate 6 restricts the directional wheel 12 to ensure that the operating trolley 1 cannot move. At the same time, according to the braking force required by the directional wheel 12, the pawl 217 is engaged between two adjacent ratchet teeth 221 among a number of ratchet teeth 221. When the brake plate 6 provides maximum braking force to the directional wheel 12, press the handle button 214 to push the push rod 215 and the pawl 217, thereby causing the pawl 217 to move out from between the two ratchet teeth 221. Lift the handbrake handle 21 to completely remove the pawl 217 from between the two adjacent ratchet teeth 221. At this time, press down the handbrake handle 21 to more easily rotate the end of the connecting part 212 connected to the brake cable 5 downward. Under the action of the buffer spring 52 and the return spring 51, the brake plate 6 is separated from the directional wheel 12, releasing the restriction on the directional wheel 12.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-spring brake device for operating a trolley, provided on a frame of the operating trolley, characterized in that, The double-spring brake device comprises a hand brake assembly, the hand brake assembly is installed on the rack through a hand brake mounting plate, one side of the bottom of the rack is connected with a brake mounting plate, one end of the hand brake assembly is connected with a brake cable, the lower end of the brake cable penetrates through the brake mounting plate, and the lower end of the brake cable extends to the directional wheel at the bottom of the operation trolley, the lower end of the brake cable is connected with a return spring and a buffer spring, the return spring and the buffer spring are distributed above and below and are sleeved outside the brake cable, the top end of the return spring abuts against the side wall of the brake mounting plate, and the lower end of the brake cable is further provided with a wire clamping screw rod, a locking nut is connected to the wire clamping screw rod, and the locking nut abuts against the bottom end of the buffer spring; a brake plate is arranged between the return spring and the buffer spring, the brake plate is sleeved outside the brake cable, one end of the brake plate abuts against the directional wheel of the operation trolley, and the middle part of the brake plate is connected with one end of the brake mounting plate through a brake plate mounting column.

2. A dual spring brake device for operating a trolley according to claim 1, wherein, The hand brake assembly comprises a hand brake handle and a ratchet mounting plate, one side of the ratchet mounting plate is installed on the hand brake mounting plate through a bolt, and the top end of the ratchet mounting plate is provided with a plurality of ratchet teeth arranged in an arc shape; the hand brake handle comprises an integrally formed handle part and a connecting part, the connecting part is arranged at the bottom end of the handle part, the connecting part is in an L shape as a whole, an abutment plate is arranged in the connecting part, the abutment plate is arranged at one end of the connecting part connected with the handle part, the middle part of the connecting part is rotationally connected with the middle part of the ratchet mounting plate, and the other end of the connecting part is connected with the brake cable; one end of the handle part is provided with a handle button, a push rod is connected in the handle part, the top end of the push rod is connected with the handle button, a hand brake spring is sleeved outside the push rod, the top end of the hand brake spring is connected with the push rod, and the bottom end of the hand brake spring abuts against the abutment plate; the bottom end of the push rod penetrates through the abutment plate and extends to the inside of the connecting part, the bottom end of the push rod is rotationally connected with a ratchet pawl, one end of the ratchet pawl is clamped between two adjacent ratchet teeth, and the middle part of the ratchet pawl is rotationally connected with the side wall of the connecting part.

3. A dual spring brake device for operating a trolley according to claim 2, wherein, The brake cable is sleeved with a wire tube, the top end of the wire tube is connected with the hand brake mounting plate, and the bottom end of the wire tube is connected with the brake mounting plate.

4. A dual spring brake device for operating a trolley according to claim 3, wherein, The top end of the brake mounting plate is installed at the lower part of the rack of the operation trolley, the top end of the brake mounting plate is provided with a bending part integrally formed thereon, the lower surface of the bending part abuts against the top end of the return spring, one end of the bending part is connected with the wire tube, and the brake cable in the wire tube is in sliding connection with the bending part; the bottom end of the brake mounting plate is rotationally connected with the brake plate mounting column.

5. A dual spring brake device for operating a trolley according to claim 4, wherein, The elastic coefficient of the return spring is smaller than that of the buffer spring.

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