Handle brake of electric wheelchair

Abstract

The utility model discloses an electrically powered wheelchair handle brake, which relates to the technical field of electrically powered wheelchairs, and comprises a brake box, the rear side of the brake box is provided with a dismounting assembly, the brake box is internally provided with a brake locking mechanism for braking and locking a wheelchair, and the brake locking mechanism comprises a locking assembly, a handle assembly and a handle assembly, a user pushes a handle to drive a rotating shaft and a cam to rotate, the cam pushes a push plate, the push plate extrudes a second spring, the push plate pushes a mounting plate, a fixing plate and a brake pad through a moving column, the brake pad makes contact and friction with wheels of the wheelchair, and the wheelchair is braked; when the handle is pushed, the pawl and the ratchet wheel are meshed and separated, when the handle stops pushing, the pawl and the ratchet wheel are meshed, and the cam is locked through the ratchet wheel, so that the wheelchair is locked, and the wheelchair stops moving.

Description

Technical Field

[0001] The utility model relates to the technical field of electric wheelchairs, in particular to a handle brake for an electric wheelchair. Background Art

[0002] Electric wheelchairs are modified and upgraded based on traditional manual wheelchairs by adding high-performance power drive devices, intelligent control devices, batteries and other components. They are a new generation of intelligent wheelchairs with manually operated intelligent controllers that can drive the wheelchair to complete multiple functions such as forward, backward, turning, standing, lying down, etc. They are high-tech products that combine modern precision machinery, intelligent CNC, engineering mechanics and other fields.

[0003] After checking the public announcement number: CN216628937U, an electric wheelchair with a handle brake is disclosed, including a mounting plate, a brake box is provided on the top surface of the mounting plate, a junction box is provided on the top surface of the brake box, a rotating shaft is installed at the center of the top surface of the brake box, a driving assembly is sleeved on the outside of the rotating shaft, the outer end of the driving assembly is plugged and connected to the operating assembly, and the driving assembly and the operating assembly are relatively slidably connected; the driving assembly includes a rotating plate and a long plate, and the rotating plate is sleeved on the outer end of the rotating shaft; a positioning column is provided on the top surface of the brake box, and an arc groove is opened on the rotating plate near the long plate, and the positioning column extends into the arc groove; the utility model can be adapted to different operating height requirements by introducing an adjustable handle, so that users can operate faster and more conveniently, and the handle is a separately installed structure, which does not affect the normal production of the brake.

[0004] Based on the above-mentioned prior art, the currently available electric wheelchair handle brakes still have the following problems: although the existing electric wheelchair handle brakes are designed to automatically rebound and unlock after braking is completed, in actual applications, when it is necessary to ensure that the electric wheelchair is stably locked to prevent movement, such brakes generally lack a special locking mechanism. In addition, when faced with a situation where the brakes need to be repaired or replaced, the disassembly and assembly process of the existing electric wheelchair handle brakes is often complicated and cumbersome. For this reason, the utility model provides an electric wheelchair handle brake. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an electric wheelchair handle brake, which solves the following problems existing in the existing electric wheelchair handle brakes: although the existing electric wheelchair handle brakes are designed to automatically rebound and unlock after braking is completed, in actual applications, when it is necessary to ensure that the electric wheelchair is stably locked to prevent movement, such brakes generally lack a special locking mechanism; in addition, when faced with a situation where the brakes need to be repaired or replaced, the disassembly and assembly process of the existing electric wheelchair handle brakes is often complicated and cumbersome.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions: an electric wheelchair handle brake, including a brake box, a disassembly assembly is arranged at the rear side of the brake box, and a brake locking mechanism is arranged inside the brake box for locking the wheelchair, and the brake locking mechanism includes:

[0007] The locking assembly is arranged inside the brake box, and comprises a ratchet wheel fixedly mounted inside the brake box, a rotating shaft is rotatably mounted on the front side of the ratchet wheel, a cam is fixedly mounted on the front end of the rotating shaft, a handle is fixedly mounted on the top of the rotating shaft, a pawl is rotatably mounted on the rear side of the handle, and a slide groove is provided inside the pawl;

[0008] The brake assembly is arranged inside the brake box and is used to brake the wheelchair.

[0009] Preferably, the locking assembly also includes a first spring installed inside the handle, a sliding column is slidably installed inside the handle, a connecting rod is fixedly installed on the left side of the sliding column, a rotating sliding column is rotatably installed on the rear side of the bottom end of the connecting rod, and the rotating sliding column slides inside the sliding groove, and the outer ring of the handle is provided with a grip sleeve.

[0010] Preferably, the brake assembly includes a mounting plate fixedly mounted inside the brake box, two movable columns are slidably mounted inside the mounting plate, the outer ring of the movable column is provided with a second spring, a push plate is fixedly mounted on the right end of the movable column, a fixed plate is fixedly mounted on the left end of the movable column, and a brake pad is fixedly mounted on the left side of the fixed plate.

[0011] Preferably, the disassembly and assembly component includes a clamping block fixedly mounted on the rear side of the brake box, a clamping box mounted on the clamping block, and the clamping block is slidably inserted into the interior of the clamping box, a connecting seat is fixedly mounted on the left end of the clamping box, a screw rod is rotatably mounted inside the connecting seat, a clamping seat is fixedly mounted on the right end of the clamping box, and the screw rod is slidably mounted into the interior of the clamping seat, a nut is rotatably mounted on the outer ring thread of the screw rod, and a pipe clamp is mounted on the rear end bolt of the clamping box.

[0012] Preferably, the pawl is meshed with the ratchet wheel.

[0013] Preferably, the outer ring of the cam contacts the right side of the push plate.

[0014] The utility model provides a handle brake for an electric wheelchair. Compared with the prior art, it has the following advantages:

[0015] Beneficial effects:

[0016] (1) The electric wheelchair handle brake is driven by the user to push the handle to drive the rotating shaft and the cam to rotate. The cam pushes the push plate, and the push plate squeezes the second spring. The push plate pushes the mounting plate, the fixing plate and the brake pad through the moving column. The brake pad and the wheelchair wheel are in contact and friction with each other to brake the wheelchair. When the handle is pushed, the pawl is driven to move, and the pawl and the ratchet are engaged and separated. When the handle stops pushing, the pawl and the ratchet are engaged, and the cam is locked through the ratchet, thereby locking the wheelchair and stopping it from moving.

[0017] (2) The electric wheelchair handle brake is provided with a disassembly and assembly component. The card block is slidably inserted into the interior of the card box, and the screw rod rotates at the connection point with the connecting seat. The screw rod slides into the interior of the card seat, and the nut is rotated to fix the screw rod, thereby fixing the card box. When the card block slides out of the card box, the nut is rotated in the opposite direction to make the screw rod slide out of the interior of the card seat, thereby realizing rapid disassembly and assembly of the brake, which is convenient for replacing or repairing the brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a right-side stereoscopic structural diagram of the utility model;

[0019] Figure 2 It is a sectional three-dimensional structural diagram of the utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the locking assembly of the utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the brake assembly of the utility model;

[0022] Figure 5 It is a three-dimensional structural diagram of the disassembly and assembly components of the utility model.

[0023] In the figure: 1-brake box, 2-brake locking mechanism, 21-locking assembly, 211-ratchet, 212-rotating shaft, 213-cam, 214-handle, 215-slide, 216-first spring, 217-slide column, 218-grip, 219-connecting rod, 2110-rotating slide column, 2111-pawl, 22-brake assembly, 221-mounting plate, 222-fixed plate, 223-brake pad, 224-movable column, 225-second spring, 226-push plate, 3-disassembly and assembly assembly, 31-block, 32-card box, 33-pipe clamp, 34-connecting seat, 35-card seat, 36-screw rod, 37-nut. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0026] An electric wheelchair handle brake comprises a brake box 1, a disassembly assembly 3 is arranged at the rear side of the brake box 1, a brake locking mechanism 2 is arranged inside the brake box 1 for locking the wheelchair, and the brake locking mechanism 2 comprises:

[0027] The locking assembly 21 is arranged inside the brake box 1, and includes a ratchet 211 fixedly installed inside the brake box 1, a rotating shaft 212 is rotatably installed on the front side of the ratchet 211, a cam 213 is fixedly installed on the front end of the rotating shaft 212, a handle 214 is fixedly installed on the top of the rotating shaft 212, a pawl 2111 is rotatably installed on the rear side of the handle 214, and a slide groove 215 is opened inside the pawl 2111;

[0028] The brake assembly 22 is disposed inside the brake box 1 and is used to brake the wheelchair.

[0029] In this embodiment, the locking assembly 21 also includes a first spring 216 installed inside the handle 214, a sliding column 217 is slidably installed inside the handle 214, a connecting rod 219 is fixedly installed on the left side of the sliding column 217, a rotating sliding column 2110 is rotatably installed on the rear side of the bottom end of the connecting rod 219, and the rotating sliding column 2110 slides inside the sliding groove 215, and the outer ring of the handle 214 is provided with a grip sleeve 218.

[0030] When the handle 214 is pushed, the pawl 2111 is driven to move, and the ratchet 2111 is lifted by the teeth. When the pawl 2111 is lifted, the pawl 2111 pulls the slide post 217 downward by rotating the slide post 2110 and the connecting rod 219, and the slide post 217 squeezes the first spring 216. Then the first spring 216 pushes the slide post 217 by its own elastic force, so that the pawl 2111 and the ratchet 211 are meshed. When the handle 214 stops pushing, the pawl 2111 is meshed with the ratchet 211, and the cam 213 is locked through the ratchet 211, so the wheelchair is locked and stops moving.

[0031] When releasing the lock, the user presses down the slide column 217, and the slide column 217 presses down the first spring 216. When the slide column 217 is pressed down, the connecting rod 219 drives the rotating slide column 2110 to be pressed down. The rotating slide column 2110 drives the pawl 2111 to rotate by sliding inside the slide groove 215, so that the engagement between the pawl 2111 and the ratchet 211 is released, and the handle 214 is pulled back to reset. At this time, the second spring 225 pushes the push plate 226 through its own elastic force to drive the mounting plate 221, the fixing plate 222 and the brake pad 223 to move synchronously and reset.

[0032] In this embodiment, the brake assembly 22 includes a mounting plate 221 fixedly installed inside the brake box 1, and two movable columns 224 are slidably installed inside the mounting plate 221. The outer ring of the movable column 224 is provided with a second spring 225. A push plate 226 is fixedly installed on the right end of the movable column 224, a fixed plate 222 is fixedly installed on the left end of the movable column 224, and a brake pad 223 is fixedly installed on the left side of the fixed plate 222.

[0033] The cam 213 pushes the push plate 226, which squeezes the second spring 225. The push plate 226 pushes the mounting plate 221, the fixing plate 222 and the brake pad 223 through the movable column 224. The brake pad 223 contacts and rubs with the wheel of the wheelchair to brake the wheelchair. The second spring 225 pushes the push plate 226 through its own elastic force, driving the mounting plate 221, the fixing plate 222 and the brake pad 223 to move and reset synchronously.

[0034] In this embodiment, the disassembly and assembly component 3 includes a clamping block 31 fixedly installed on the rear side of the brake box 1, a clamping box 32 is installed on the clamping block 31, and the clamping block 31 is slidably inserted into the interior of the clamping box 32, a connecting seat 34 is fixedly installed on the left end of the clamping box 32, a screw rod 36 is rotatably installed inside the connecting seat 34, a clamping seat 35 is fixedly installed on the right end of the clamping box 32, and the screw rod 36 is slidably inserted into the interior of the clamping seat 35, a nut 37 is rotatably sleeved on the outer circle of the screw rod 36, and a pipe clamp 33 is installed on the rear end bolt of the clamping box 32.

[0035] The card block 31 is slidably inserted into the interior of the card box 32, and the screw rod 36 rotates at the connection point with the connecting seat 34, and the screw rod 36 slides and begins to enter the interior of the card seat 35. The nut 37 is rotated to fix the screw rod 36, thereby fixing the card box 32. When the card block 31 slides out of the card box 32, the nut 37 is rotated in the opposite direction to make the screw rod 36 slide out of the interior of the card seat 35, thereby realizing quick disassembly and assembly of the brake, which is convenient for replacing or repairing the brake.

[0036] In this embodiment, the pawl 2111 is meshed with the ratchet wheel 211 .

[0037] In this embodiment, the outer ring of the cam 213 contacts the right side of the push plate 226 .

[0038] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0039] During operation, first fix the card box 32 on the wheelchair through the pipe clamp 33, then slide the brake box 1 into the card box 32 through the card block 31, the screw rod 36 rotates at the connection point with the connecting seat 34, and the screw rod 36 starts to slide into the inside of the card seat 35, and the nut 37 is turned to fix the screw rod 36, and the card box 32 is fixed to connect the brake box 1 to the wheelchair. When the brake is locked, the user drives the rotating shaft 212 and the cam 213 to rotate by pushing the handle 214, and the cam 213 pushes the push plate 226. The push plate 226 squeezes the second spring 225, and the push plate 226 pushes the mounting plate 221, the fixing plate 222 and the brake pad 223 through the moving column 224. The brake pad 223 contacts and rubs with the wheel of the wheelchair to brake the wheelchair. When the handle 214 is pushed, the pawl 2111 is driven to move, and the ratchet 2111 is lifted by the teeth. When the pawl 2111 is lifted, the pawl 2111 pulls the slide column 217 downward by rotating the slide column 2110 and the connecting rod 219, and the slide column 217 squeezes the first spring. 216, and then the first spring 216 pushes the slide post 217 by its own elastic force, so that the pawl 2111 and the ratchet 211 are meshed. When the handle 214 stops pushing, the pawl 2111 and the ratchet 211 are meshed, and the cam 213 is locked by the ratchet 211, so that the wheelchair is locked and stops moving. When unlocking, the user presses down the slide post 217, and the slide post 217 presses down the first spring 216. When the slide post 217 is pressed down, the connecting rod 219 drives the rotating slide post 2110 to press down , the rotating slide column 2110 slides inside the slide groove 215, driving the pawl 2111 to rotate, so that the engagement between the pawl 2111 and the ratchet 211 is released, and the handle 214 is pulled back to reset. At this time, the second spring 225 pushes the push plate 226 through its own elastic force to drive the mounting plate 221, the fixing plate 222 and the brake pad 223 to move and reset synchronously. Then, when disassembling the device, the nut 37 is rotated in the opposite direction to make the screw rod 36 slide out of the interior of the card seat 35, and the card block 31 slides out of the card box 32 for disassembly.

[0040] 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.

[0041] 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. An electric wheelchair handle brake, comprising a brake box (1), characterized in that: The rear side of the brake box (1) is provided with a disassembly assembly (3), and the interior of the brake box (1) is provided with a brake locking mechanism (2) for locking the wheelchair. The brake locking mechanism (2) comprises: The locking assembly (21) is arranged inside the brake box (1), and comprises a ratchet (211) fixedly mounted inside the brake box (1), a rotating shaft (212) being rotatably mounted on the front side of the ratchet (211), a cam (213) being fixedly mounted on the front end of the rotating shaft (212), a handle (214) being fixedly mounted on the top of the rotating shaft (212), a ratchet pawl (2111) being rotatably mounted on the rear side of the handle (214), and a slide groove (215) being provided inside the ratchet pawl (2111); The brake assembly (22) is arranged inside the brake box (1) and is used to brake the wheelchair.

2. The electric wheelchair handle brake according to claim 1, characterized in that: The locking assembly (21) also includes a first spring (216) installed inside the handle (214), a sliding column (217) is slidably installed inside the handle (214), a connecting rod (219) is fixedly installed on the left side of the sliding column (217), a rotating sliding column (2110) is rotatably installed on the rear side of the bottom end of the connecting rod (219), and the rotating sliding column (2110) slides inside the sliding groove (215), and the outer ring of the handle (214) is provided with a grip sleeve (218).

3. The electric wheelchair handle brake according to claim 1, characterized in that: The brake assembly (22) includes a mounting plate (221) fixedly mounted inside the brake box (1), two movable columns (224) are slidably mounted inside the mounting plate (221), the outer ring of the movable column (224) is provided with a second spring (225), a push plate (226) is fixedly mounted on the right end of the movable column (224), a fixed plate (222) is fixedly mounted on the left end of the movable column (224), and a brake pad (223) is fixedly mounted on the left side of the fixed plate (222).

4. The electric wheelchair handle brake according to claim 1, characterized in that: The disassembly and assembly component (3) includes a clamping block (31) fixedly mounted on the rear side of the brake box (1), a clamping box (32) being mounted on the clamping block (31), and the clamping block (31) is slidably inserted into the interior of the clamping box (32), a connecting seat (34) is fixedly mounted on the left end of the clamping box (32), a screw rod (36) is rotatably mounted inside the connecting seat (34), a clamping seat (35) is fixedly mounted on the right end of the clamping box (32), and the screw rod (36) is slidably mounted into the interior of the clamping seat (35), a nut (37) is rotatably sleeved on the outer ring thread of the screw rod (36), and a pipe clamp (33) is mounted on the rear end bolt of the clamping box (32).

5. The electric wheelchair handle brake according to claim 1, characterized in that: The pawl (2111) is meshed with the ratchet wheel (211).

6. The electric wheelchair handle brake according to claim 3, characterized in that: The outer ring of the cam (213) contacts the right side of the push plate (226).

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