A brake mechanism

Abstract

A brake mechanism includes a sleeve, a latch, a spring, a hub, a connecting screw, a knob and a quick release lever, wherein the sleeve, the hub and the knob are sequentially arranged on the quick release lever along the axial direction, and the sleeve is fixed to the frame; the hub is provided with a first hub ring and a second hub ring, and a latch is arranged on the hub along the axial direction, one end of the latch passes through a through hole arranged on the first hub ring and can be detachably inserted into a brake hole arranged on the sleeve, and the other end of the latch is provided with a connecting screw through a threaded connection; the other end of the connecting screw is provided with a head, a slide groove is provided on the knob, a track groove is provided in the slide groove, the head is located in the track groove, and the connecting screw passes through the through hole and the slide groove arranged on the second hub ring; a spring is provided on the connecting screw between the latch and the second hub ring. The reliability of braking of self-propelled, nursing wheelchairs or other low-speed equipment is improved.

Description

Technical Field

[0001] The invention relates to a brake mechanism which is suitable for self-propelled, nursing wheelchairs or other low-speed running equipment. Background Art

[0002] Existing self-propelled, nursing wheelchairs or other low-speed equipment generally use toggle brakes, drum brakes and other types of brakes. Usually, toggle brakes achieve the purpose of braking by rubbing and squeezing the tires through the brake lever; drum brakes achieve the purpose of braking by friction of brake pads. The above commonly used braking methods all stop the wheels by friction and squeezing. Long-term use causes the contact surface to wear and affect the braking effect. Later, the brakes must be adjusted to achieve the initial use effect. The reliability of the brakes is not good. If they are neglected in maintenance, it may cause more serious consequences. Summary of the invention

[0003] In view of the above situation, in order to solve the problems existing in the above technology, the present invention proposes a braking mechanism that can improve the reliability of braking of self-propelled, nursing wheelchairs or other low-speed equipment.

[0004] A brake mechanism according to the present invention comprises a sleeve, a latch, a spring, a hub, a connecting screw, a knob and a quick-release lever, wherein the sleeve, the hub and the knob are sequentially arranged on the quick-release lever along the axial direction, and the sleeve is fixed to the frame; the hub is provided with a first hub ring and a second hub ring, and a latch is axially arranged on the hub, one end of the latch passes through a through hole arranged on the first hub ring and can be detachably inserted into a brake hole arranged on the sleeve, and the other end of the latch is provided with a connecting screw through a threaded connection; the other end of the connecting screw is provided with a head, a slide groove is provided on the knob, a track groove is provided in the slide groove, the head is located in the track groove, and the connecting screw passes through the through hole and the slide groove arranged on the second hub ring; a spring is provided on the connecting screw between the latch and the second hub ring.

[0005] Preferably, the track groove is provided with a high end and a low end, the high end of the track groove is provided on the side of the knob away from the hub, the low end of the track groove is provided on the side of the knob close to the hub, and there is a smooth transition between the high end and the low end of the track groove.

[0006] Preferably, a countersunk opening is provided on the knob surface at the high end of the track groove.

[0007] Preferably, the end of the latch is provided with a latch head with a round head structure.

[0008] Preferably, a plurality of brake holes are evenly distributed on the circumference of the shaft sleeve, and the number of the brake holes is greater than the number of the combined structure consisting of the latch, the connecting screws and the spring.

[0009] Preferably, three groups of latches, connecting screws and springs are evenly distributed on the circumference of the hub.

[0010] Preferably, three slide grooves and track grooves are evenly distributed on the circumference of the knob.

[0011] Preferably, the diameter of the head is larger than the diameter of other parts of the connecting screw.

[0012] Preferably, the width of the slide groove is smaller than the diameter of the protrusion and larger than the diameter of other parts of the connecting screw.

[0013] Preferably, a stop head with a diameter larger than the inner diameter of the knob is provided at one end of the quick-release rod, and a pin hole is provided at the other end of the quick-release rod.

[0014] After adopting the technology proposed by the present invention, the brake mechanism according to the embodiment of the present invention has the following beneficial effects: a pin passing through the wheel hub (hub) can be inserted into a special hole connected to the frame, that is, a brake hole set on the bushing to relatively fix the wheel hub and the frame so that they do not rotate relative to each other, thereby ensuring the reliability of the brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural diagram of a brake mechanism of the present application;

[0016] Figure 2 This is an exploded view of the brake mechanism structure of the present application;

[0017] Figure 3 This is a structural diagram of a brake mechanism knob of the present application.

[0018] Description of reference numerals:

[0019] Bushing 1 (fixed to the frame, frame part is hidden)

[0020] Brake hole 10

[0021] Latch 2

[0022] Spring 20

[0023] Latch head 21

[0024] Hub 3 (the spokes, aluminum rims, wheels, and handrails are hidden)

[0025] First hub hoop 31

[0026] Second hub hoop 32

[0027] Connecting screw 4

[0028] 40

[0029] Knob 5

[0030] Chute 50

[0031] Sinking 501

[0032] Track slot 51

[0033] Track slot high end 511

[0034] Track slot low end 512

[0035] Quick release lever 6

[0036] Stop head 61

[0037] Pin hole 62 DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the embodiments given in the accompanying drawings. The described embodiments include various specific details to help understanding, but they can only be regarded as exemplary and are part of the embodiments of the present invention, rather than all of the embodiments. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the field to which the present invention belongs. At the same time, in order to make the description clearer and more concise, detailed descriptions of functions and structures well known in the art will be omitted.

[0039] like Figure 1-3 As shown, a brake mechanism comprises a sleeve 1, a latch 2, a spring 20, a hub 3, a connecting screw 4, a knob 5 and a quick-release lever 6, wherein the sleeve 1, the hub 3 and the knob 5 are sequentially arranged on the quick-release lever 6 along the axial direction, and the sleeve 1 is fixed to the frame; the hub 3 is provided with a first hub ring 31 and a second hub ring 32, and the hub 3 is axially provided with a latch 2, one end of the latch 2 passes through a through hole provided on the first hub ring 31 and can be detachably inserted into a brake hole 10 provided on the sleeve 1, and the other end of the latch 2 is provided with a connecting screw 4 through a threaded connection; the other end of the connecting screw 4 is provided with a head 40, and the knob 5 is provided with a slide groove 50, and the slide groove 50 is provided with a track groove 51, and the head 40 is located in the track groove 51, and the connecting screw 4 passes through the through hole and the slide groove 50 provided on the second hub ring 32; a spring 20 is provided on the connecting screw 4 between the latch 2 and the second hub ring 32.

[0040] A plurality of brake holes 10 are evenly distributed on the circumference of the shaft sleeve 1 , and the number of the brake holes 10 is greater than the number of the combined structure composed of the latch 2 , the connecting screw 4 and the spring 20 .

[0041] Three groups of latches 2, connecting screws 4 and springs 20 are evenly distributed on the circumference of the hub 3.

[0042] The knob 5 is evenly distributed on its circumference with three slide grooves 50 and a track groove 51 .

[0043] The track groove 51 is provided with a track groove high end 511 and a track groove low end 512. The track groove high end 511 is provided on the side of the knob 5 away from the hub 3, and the track groove low end 512 is provided on the side of the knob 5 close to the hub 3. There is a smooth transition between the track groove high end 511 and the track groove low end 512.

[0044] A sinking opening 501 is provided on the surface of the knob 5 at the high end 511 of the track groove.

[0045] The end of the latch pin 2 is provided with a latch pin head 21 with a round head structure.

[0046] The diameter of the head 40 is larger than the diameter of other parts of the connecting screw 4 .

[0047] The width of the slide groove 50 is smaller than the diameter of the protruding head 40 and larger than the diameter of other parts of the connecting screw.

[0048] One end of the quick release rod 6 is provided with a stopper head 61 whose diameter is larger than the inner diameter of the knob 5 , and the other end of the quick release rod 6 is provided with a pin hole 62 .

[0049] According to a brake mechanism of the present application, a track groove in a slide groove is high at one end and low at the other end, the high end has a sinking opening to accommodate the protrusion of a connecting screw, and the outer periphery of the sinking opening is a track in the shape of a connecting screw protrusion that smoothly transitions to the low end.

[0050] According to a brake mechanism of the present application, the installation method and working principle are:

[0051] The sleeve 1 can be assembled to the frame by welding, bolt connection or flange connection, the pin 2 is assembled to the hub 3, and then the connecting screw 4 is passed through the slide groove of the knob 5 and then assembled with the pin 2 through the hole on the hub 3, and the quick release rod 6 connects the above two parts.

[0052] When the vehicle's running brake is not in effect, the connecting screw 4 protrudes from the high end sinking opening of the track groove of the knob 5 slide groove. At this time, the connecting screw 4 pulls the latch 2 outward, and the latch head 21 of the latch 2 is lower than the outer edge of the first hub ring 31 on the inner side of the hub 3. The latch 2 is in a state of leaving the circular hole of the shaft sleeve 1, and the spring 20 is in a contracted state.

[0053] When the vehicle stops and the brake is applied, the connecting screw 4 is exposed at the lower end of the track groove of the knob 5 slide groove, and the spring 20 is in the expanded state, pushing the latch 2 out of the hub 3, and the latch head 21 of the latch 2 extends out of the outer edge of the first hub ring 31 inside the hub 3, and the latch head 21 penetrates into the circular hole 10 of the shaft sleeve 1. At this time, since the latch 2 passes through the circular holes of the hub 3 and the shaft sleeve 1 at the same time, the two will not produce relative movement to achieve the braking effect. At the same time, due to the action of the latch spring 20, the latch 2 will not be separated from the circular hole of the shaft sleeve 1 if there is no external force.

[0054] The extension and retraction of the latch pin 2 can be achieved by rotating the knob 5 clockwise or counterclockwise.

[0055] According to a brake mechanism of the present application, a pin passing through the wheel hub (hub) can be inserted into a special hole connected to the frame, i.e., a brake hole provided on the shaft sleeve, to relatively fix the wheel hub and the frame so that they do not rotate relative to each other, thereby ensuring the reliability of the brake.

[0056] The terms "upper", "lower", "above", "below" or similar terms used in this application are relative relationships in terms of the placement state in normal use, that is, the positional relationships roughly shown in the drawings of this application. When the placement state changes, such as when it is turned over, the corresponding positional relationship should also be changed accordingly to understand or implement the technical solution of this application.

Claims

1. A brake mechanism, characterized in that: The invention comprises a shaft sleeve (1), a latch (2), a spring (20), a hub (3), a connecting screw (4), a knob (5) and a quick release lever (6), wherein the shaft sleeve (1), the hub (3) and the knob (5) are sequentially arranged on the quick release lever (6) along the axial direction, and the shaft sleeve (1) is fixed to the frame; the hub (3) is provided with a first hub ring (31) and a second hub ring (32), and the hub (3) is provided with a latch (2) along the axial direction, one end of the latch (2) passes through a through hole provided on the first hub ring (31) and can be detachably inserted into a brake hole (10) provided on the shaft sleeve (1), and the other end of the latch (2) is provided with a connecting screw (4) through a threaded connection; the other end of the connecting screw (4) is provided with a head (40), the knob (5) is provided with a slide groove (50), a track groove (51) is provided in the slide groove (50), the head (40) is located in the track groove (51), and the connecting screw (40 ... connecting screw (4) is provided with a connecting screw (4) through a threaded connection; the connecting screw (4) is provided with a connecting screw (4) through a threaded connection; the connecting screw (4) is provided with a connecting screw (4) through a threaded connection; the connecting screw (4) is provided with a connecting screw (4) through a threaded connection; the connecting screw (4) is provided with a connecting screw (4) through a threaded connection; the connecting screw (4) is provided with a connecting screw (4) through a The screw (4) passes through the through hole and the slide groove (50) provided on the second hub ring (32); a spring (20) is provided on the connecting screw (4) between the latch pin (2) and the second hub ring (32); the track groove (51) is provided with a track groove high end (511) and a track groove low end (512); the track groove high end (511) is provided on the side of the knob (5) away from the hub (3); the track groove low end (512) is provided on the side of the knob (5) close to the hub (3); the track groove high end (511) and the track groove low end (512) are smoothly transitioned; a sinking opening (501) is provided on the surface of the knob (5) at the track groove high end (511); three groups of latch pins (2), connecting screws (4) and springs (20) are evenly distributed on the circumference of the hub (3); and three slide grooves (50) and track grooves (51) are evenly distributed on the circumference of the knob (5).

2. A brake mechanism according to claim 1, characterized in that: The end of the latch (2) is provided with a latch head (21) with a round head structure.

3. A brake mechanism according to claim 1, characterized in that: A plurality of brake holes (10) are evenly distributed on the circumference of the shaft sleeve (1), and the number of the brake holes (10) is greater than the number of the combined structure consisting of the latch (2), the connecting screw (4) and the spring (20).

4. A brake mechanism according to claim 1, characterized in that: The diameter of the head (40) is larger than the diameter of other parts of the connecting screw (4).

5. A brake mechanism according to claim 1, characterized in that: The width of the slide groove (50) is smaller than the diameter of the protrusion (40) and larger than the diameter of other parts of the connecting screw.

6. A brake mechanism according to claim 1, characterized in that: One end of the quick-release rod (6) is provided with a stopper head (61) having a diameter greater than the inner diameter of the knob (5), and the other end of the quick-release rod (6) is provided with a pin hole (62).

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