Wheel brake mechanism

Abstract

The utility model discloses a wheel brake mechanism, including the fixed frame, is located in the inside of car body, brake assembly is located below the fixed frame, and brake assembly includes the carousel, and the carousel is located one side of the wheel and is connected with the fixed connection of wheel, and the carousel side away from the wheel rotatoryly connects with the bottom block, and the bottom block top is provided with the connecting seat, and the connecting seat is fixedly connected with the car body, and the brake pin is slidably arranged in the connecting seat, and the brake pin is used for stopping the carousel.

Description

Technical Field

[0001] This utility model belongs to the field of braking technology, and particularly relates to wheel braking mechanisms. Background Technology

[0002] Medical trolleys are commonly used mobile devices in the medical field for storing various medical supplies. They come in two types: electric and manual. The rear wheels of the trolley usually use swivel wheels with built-in brakes, which can flexibly adjust the wheel angle and facilitate turning. The front wheels usually use fixed wheels to ensure the controllability of the trolley's trajectory.

[0003] However, some special medical trolleys are quite heavy, and the brake pads on the casters alone cannot achieve stable braking, which poses certain safety hazards. Therefore, a mechanism that can provide stable braking performance is needed to improve the stability of the trolley. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a wheel braking mechanism that can provide stable braking performance.

[0005] To achieve the above objectives, this utility model employs the following technical solution: a wheel braking mechanism, comprising: a fixed frame for fixed connection with a vehicle body; a brake assembly disposed below the fixed frame, the brake assembly including a turntable located on one side of the wheel and fixedly connected to the wheel, a base block rotatably connected to the side of the turntable away from the wheel, a connecting seat disposed above the base block, the connecting seat being fixedly connected to the vehicle body, a brake pin slidably disposed within the connecting seat, the brake pin being used to lock the turntable; a traction assembly disposed on one side of the brake assembly, the traction assembly including a traction cable, the traction cable being fixedly connected to the end of the brake pin away from the wheel, the traction cable being used to drive the brake pin to slide relative to the connecting seat along the thickness direction of the wheel, thereby switching between a wheel braking state and a wheel unlocking state; and a locking assembly disposed at the end of the traction cable for pulling and locking the traction cable.

[0006] Optionally, the connecting seat has a groove along the thickness direction of the wheel, the brake pin is disposed in the groove, and a pin sleeve is fixedly connected to the end of the groove, the pin sleeve being slidably connected to the brake pin.

[0007] Optionally, an elastic element is provided in the groove, the elastic element is sleeved on the brake pin, the outer wall of the brake pin is provided with an annular protrusion, one end of the elastic element is connected to the annular protrusion, and the other end of the elastic element is connected to the pin sleeve.

[0008] Optionally, the turntable has multiple arc-shaped notches spaced apart on its outer periphery. The diameter of the arc-shaped notches is the same as the diameter of the brake pin end. When the brake pin end is inserted into the arc-shaped notch, the wheel is in a braking state. When the brake pin end is disengaged from the arc-shaped notch, the wheel is in an unlocked state.

[0009] Optionally, the locking assembly includes a fixing block, which is fixedly connected to the fixing frame. The fixing block has a through groove, and a slide rod is slidably connected in the through groove. One end of the slide rod is connected to the traction cable, and the other end of the slide rod is connected to a handle. A return spring is sleeved on the slide rod.

[0010] Optionally, the fixing block is provided with a plurality of first limiting blocks on the side near the handle, and the slide rod is provided with a plurality of second limiting blocks that cooperate with the first limiting blocks on the side near the handle.

[0011] Optionally, multiple first limiting blocks are integrally formed, and multiple second limiting blocks are spaced apart and have the same size and shape.

[0012] Optionally, the traction assembly further includes a connecting box for branching the traction cable. The connecting box is fixedly connected to the fixing frame and slidably connected to the traction cable. A sensor is provided below the connecting box, and a sensing plate is connected to the corresponding position of the traction cable. The sensor is used to identify the relative position of the sensing plate.

[0013] Optionally, a straight groove is provided at the bottom of the connecting box, and the sensing sheet can slide along the straight groove.

[0014] Optionally, guide ports are connected to both sides of the bottom of the fixing frame, and the guide ports are used to insert the traction cable.

[0015] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: By setting a turntable on the side wall of the wheel, with multiple arc notches spaced apart on the outer circumference of the turntable, a brake pin is slidably set in the connecting seat, one end of the traction cable is connected to the brake pin, and the other end is connected to the locking component. By pulling and rotating the handle in the locking component, the position and rotation angle of the slide bar relative to the fixed block are adjusted, thereby driving the brake pin to insert or disengage from the arc notch, realizing the locking and unlocking of the wheel. The insertion cooperation between the brake pin and the arc notch ensures the stability of the vehicle body. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of the overall structure of this utility model. Figure 2 The diagram shown is a partial structural schematic of this utility model; Figure 3 The diagram shown is a structural schematic of the brake assembly of this utility model; Figure 4The diagram shown is a structural schematic of the locking component of this utility model; Figure 5 The diagram shown is a schematic of the sliding rod and fixing block in the wheel locking state of this utility model; Figure 6 The diagram shows the sliding rod and fixing block of this utility model in the unlocked state of the wheel.

[0017] In the diagram: 1. Mounting frame; 2. Braking assembly; 3. Traction assembly; 4. Locking assembly; 101. Guide port; 201. Turntable; 202. Base block; 203. Connecting seat; 204. Brake pin; 205. Pin sleeve; 301. Traction cable; 302. Connecting box; 401. Fixing block; 402. Slide rod; 403. Handle; 404. First limit block; 405. Second limit block. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model based on the specific circumstances.

[0021] Example Reference Figures 1 to 6 This embodiment provides a wheel braking mechanism, specifically including: a fixing frame 1, which is used to fix and connect to the vehicle body; a brake assembly 2, which is located below the fixing frame 1, and includes a turntable 201, which is located on one side of the wheel and fixedly connected to the wheel. A base block 202 is rotatably connected to the side of the turntable 201 away from the wheel. A connecting seat 203 is provided above the base block 202 and is fixedly connected to the vehicle body. A brake pin 204 is slidably provided in the connecting seat 203 and is used to lock the turntable 201; a traction assembly 3, which is located on one side of the brake assembly 2, and includes a traction cable 301, which is fixedly connected to the end of the brake pin 204 away from the wheel. The traction cable 301 is used to drive the brake pin 204 to slide relative to the connecting seat 203 along the thickness direction of the wheel to switch between the wheel braking state and the wheel unlocking state; and a locking assembly 4, which is located at the end of the traction cable 301 and is used to pull and lock the traction cable 301.

[0022] The side of the fixed frame 1 is fixedly connected to the inner wall of the vehicle body, the top of the connecting seat 203 is fixedly connected to the bottom of the vehicle body, and the traction cable 301 is covered with a cable sleeve, which is arranged along the side wall of the fixed frame 1.

[0023] The connecting seat 203 has a groove along the thickness direction of the wheel, the brake pin 204 is set in the groove, and the end of the groove is fixedly connected to the pin sleeve 205, which is slidably connected to the brake pin 204.

[0024] An elastic element is provided inside the groove. The elastic element is sleeved on the brake pin 204. The outer wall of the brake pin 204 is provided with an annular protrusion. One end of the elastic element is connected to the annular protrusion, and the other end of the elastic element is connected to the pin sleeve 205.

[0025] The turntable 201 has multiple arc-shaped notches spaced apart on its outer periphery. The diameter of the arc-shaped notches is the same as the diameter of the end of the brake pin 204. When the end of the brake pin 204 is inserted into the arc-shaped notch, the wheel is in a braking state. When the end of the brake pin 204 is disengaged from the arc-shaped notch, the wheel is in an unlocked state.

[0026] The arc of the notch is 180 degrees. When a certain arc notch rotates to the highest position, the center of the arc notch coincides with the axis of the brake pin 204.

[0027] The locking component 4 includes a fixing block 401, which is fixedly connected to the fixing frame 1. The fixing block 401 has a through groove, and a slide rod 402 is slidably connected in the through groove. One end of the slide rod 402 is connected to the traction cable 301, and the other end of the slide rod 402 is connected to a handle 403. A return spring is sleeved on the slide rod 402.

[0028] The handle 403 is located at the rear of the vehicle body and is connected to the brake pin 204 by the towing cable 301, making it convenient for personnel to pull and rotate the handle 403 at any time, thus improving convenience.

[0029] The reset spring is installed in the through groove. A stop is provided at the end of the slide rod 402 away from the handle 403. One end of the reset spring is connected to the stop and the other end is connected to the side wall of the through groove.

[0030] The fixing block 401 has multiple first limiting blocks 404 on the side near the handle 403, and the slide bar 402 has multiple second limiting blocks 405 that cooperate with the first limiting blocks 404 on the side near the handle 403. The multiple first limiting blocks 404 are integrally formed, and the multiple second limiting blocks 405 are spaced apart and are the same size and shape.

[0031] When the handle 403 is rotated to the horizontal position, the first limiting block 404 moves towards the fixed block 401 under the action of the return spring until it is close to the side wall of the fixed block 401. At this time, multiple first limiting blocks 404 and multiple second limiting blocks 405 form a complete circular block.

[0032] The traction assembly 3 also includes a connecting box 302, which is used to connect the traction cable 301. The connecting box 302 is fixedly connected to the fixing frame 1 and slidably connected to the traction cable 301. A sensor is provided below the connecting box 302, and a sensing plate is connected to the corresponding position of the traction cable 301. The sensor is used to identify the relative position of the sensing plate. A straight groove is provided at the bottom of the connecting box 302, and the sensing plate can slide along the straight groove. Guide ports 101 are connected to both sides of the bottom of the fixing frame 1, and the guide ports 101 are used to insert the traction cable 301.

[0033] Before use, the trolley is in a braking state, with the brake pin 204 located at the arc notch at the highest point of the turntable 201 and the slide bar 402 located in the through groove of the fixed block 401. When the trolley needs to be started, pull the handle 403, which will sequentially move the slide bar 402, the traction cable 301, and the brake pin 204. The brake pin 204 will disengage from the arc notch, and the wheels will be unlocked. At this time, rotate the handle 403 to a vertical position. Under the action of the return spring, the side wall of the first limiting block 404 near the fixed block 401 and the side wall of the second limiting block 405 near the handle 403 will fit tightly together, thereby positioning the brake pin 204. When the trolley needs to be braked again, pull the handle 403 and rotate it to a horizontal position. At the same time, gently push the trolley body so that the arc notch on the turntable 201 closest to the brake pin 204 is aligned with the end of the brake pin 204. Under the action of the elastic element, the brake pin 204 is inserted into the arc notch. At the same time, the slide bar 402 returns to its initial state under the action of the return spring, thereby completing the locking and braking process.

[0034] The above content is only a preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A wheel braking mechanism, characterized in that, include: A fixing frame (1) is used to fix it to the vehicle body; Brake assembly (2) is located below the fixed frame (1). The brake assembly (2) includes a turntable (201). The turntable (201) is located on one side of the wheel and is fixedly connected to the wheel. A base block (202) is rotatably connected to the side of the turntable (201) away from the wheel. A connecting seat (203) is provided above the base block (202). The connecting seat (203) is fixedly connected to the vehicle body. A brake pin (204) is slidably provided in the connecting seat (203). The brake pin (204) is used to lock the turntable (201). The traction assembly (3) is located on one side of the brake assembly (2). The traction assembly (3) includes a traction cable (301). The traction cable (301) is fixedly connected to the end of the brake pin (204) away from the wheel. The traction cable (301) is used to drive the brake pin (204) to slide relative to the connecting seat (203) along the thickness direction of the wheel, so as to switch between the wheel braking state and the wheel unlocking state. A locking component (4) is located at the end of the traction cable (301) for pulling and locking the traction cable (301).

2. The wheel braking mechanism according to claim 1, characterized in that, The connecting seat (203) has a groove along the thickness direction of the wheel, the brake pin (204) is set in the groove, and a pin sleeve (205) is fixedly connected to the end of the groove. The pin sleeve (205) is slidably connected to the brake pin (204).

3. The wheel braking mechanism according to claim 2, characterized in that, An elastic element is provided in the groove. The elastic element is sleeved on the brake pin (204). The outer wall of the brake pin (204) is provided with an annular protrusion. One end of the elastic element is connected to the annular protrusion, and the other end of the elastic element is connected to the pin sleeve (205).

4. The wheel braking mechanism according to claim 3, characterized in that, The turntable (201) has multiple arc-shaped notches spaced apart on its outer periphery. The diameter of the arc-shaped notches is the same as the diameter of the end of the brake pin (204). When the end of the brake pin (204) is inserted into the arc-shaped notch, the wheel is in a braking state. When the end of the brake pin (204) is removed from the arc-shaped notch, the wheel is in an unlocked state.

5. The wheel braking mechanism according to claim 1, characterized in that, The locking component (4) includes a fixing block (401), which is fixedly connected to the fixing frame (1). The fixing block (401) has a through groove, and a sliding rod (402) is slidably connected in the through groove. One end of the sliding rod (402) is connected to the traction cable (301), and the other end of the sliding rod (402) is connected to a handle (403). A return spring is sleeved on the sliding rod (402).

6. The wheel braking mechanism according to claim 5, characterized in that, The fixing block (401) has a plurality of first limiting blocks (404) on the side near the handle (403), and the slide bar (402) has a plurality of second limiting blocks (405) that cooperate with the first limiting blocks (404) on the side near the handle (403).

7. The wheel braking mechanism according to claim 6, characterized in that, Multiple first limiting blocks (404) are integrally formed, and multiple second limiting blocks (405) are spaced apart and have the same size and shape.

8. The wheel braking mechanism according to claim 1, characterized in that, The traction assembly (3) further includes a connecting box (302), which is used to connect the traction cable (301). The connecting box (302) is fixedly connected to the fixing frame (1), and the connecting box (302) is slidably connected to the traction cable (301). A sensor is provided below the connecting box (302), and a sensor plate is connected to the corresponding position of the traction cable (301). The sensor is used to identify the relative position of the sensor plate.

9. The wheel braking mechanism according to claim 8, characterized in that, The bottom of the connecting box (302) has a straight groove, and the sensing sheet can slide along the straight groove.

10. The wheel braking mechanism according to claim 1, characterized in that, The bottom sides of the fixing frame (1) are connected to guide ports (101), which are used to insert the traction cable (301).

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