Jack brake device

Abstract

The utility model discloses a jack brake device which comprises a pedal, a brake limiting plate, a steel wire rope, a brake rod, a brake block and an idler wheel, one end of the pedal is movably hinged to a wall plate on one side of a jack through a pedal shaft, and the brake limiting plate is located below the pedal and movably hinged to the wall plate on the same side with the pedal through a limiting plate shaft; one end of the steel wire rope is arranged on the brake limiting plate, and the other end of the steel wire rope is arranged at one end of the brake rod which is movably hinged to the wall plate. The brake block is sleeved on the front axle, and a gap is formed between the brake block and the front axle; rollers are movably hinged to the brake blocks; a protrusion is arranged on the side, close to the brake limiting plate, of the pedal, a groove used in cooperation with the protrusion is formed in the side, close to the pedal, of the brake limiting plate, and the lower end of the protrusion abuts against the upper end face of the brake limiting plate all the time. The brake device of the jack can be switched between a relaxed state and a working state by treading the pedal.

Description

Technical Field

[0001] The utility model relates to a jack braking device, belonging to the technical field of jacks. Background Art

[0002] During the repair process of an existing ordinary jack, after the jack lifts the load, it is easy for the front wheel to move between the front wheel and the ground, resulting in accidents. Content of the Utility Model

[0003] In order to solve the above technical problems existing in the prior art, the utility model provides a jack braking device. By setting a brake block, after the jack lifts the load, the bottom surface of the brake block is closely attached to the ground through the cooperation between the pedal and the brake rod, and has sufficient friction with the ground to ensure that the jack does not move after lifting the load, thereby preventing accidents.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A jack braking device, characterized in that it includes a pedal, a brake limit plate, a steel wire rope, a brake rod, a brake block and a roller. One end of the pedal is movably hinged to the wall plate on one side of the jack through a pedal shaft. The brake limit plate is located below the pedal and the brake limit plate is movably hinged to the wall plate on the same side of the pedal through a limit plate shaft. One end of the steel wire rope is arranged on the brake limit plate, and the other end is arranged at one end of the brake rod. The brake rod is movably hinged to the wall plate. The brake block is sleeved on the front wheel shaft and there is a gap between the brake block and the front wheel shaft. The roller is movably hinged to the brake block. The brake rod is located between the roller and the front wheel shaft, and the upper and lower end surfaces of the brake rod are always in contact with the outer surfaces of the roller and the front wheel shaft.

[0006] A protrusion is arranged on one side of the pedal close to the brake limit plate. A groove matched with the protrusion is arranged on one side of the brake limit plate close to the pedal, and the lower end of the protrusion always abuts against the upper end surface of the brake limit plate. By stepping on the pedal, the jack braking device can be switched between a relaxed state and a working state.

[0007] Furthermore, one end of the steel wire rope is installed on the brake limit plate through a first steel wire rope seat and a first steel wire fixing sleeve; the other end of the steel wire rope is installed at one end of the brake rod through a second steel wire rope seat and a second steel wire fixing sleeve.

[0008] Further, a wire sleeve is provided on the wire rope; a wire rope positioning sleeve is sleeved on the wire sleeve close to the brake limit plate, and a first wire retaining sleeve is provided at one end of the wire rope positioning sleeve away from the brake limit plate; a second wire retaining sleeve is provided on the wire sleeve close to the brake lever, and a return spring is sleeved on the wire rope between the second wire retaining sleeve and the brake lever.

[0009] Further, the roller is hinged to the brake block through a roller shaft.

[0010] Further, the brake lever is hinged to the wall panel through a brake lever screw.

[0011] Further, it further includes a fixing block, the fixing block is welded on the front wheel shaft, a screw is provided at the upper end of the fixing block, a compression spring is provided between the screw and the fixing block, and one end of the screw passes through a through hole at the top of the brake block and is connected to the compression spring; one end of the compression spring is fixedly provided on the fixing block, and the other end is fixedly provided on the screw.

[0012] Further, the footrest shaft and the limit plate shaft are respectively installed on the wall panel through gaskets and lock nuts.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By providing a brake block in the present utility model, after the jack lifts the load, through the cooperation between the footrest and the brake lever, the bottom surface of the brake block closely adheres to the ground, having sufficient friction with the ground, ensuring that the jack does not move after lifting the load, thereby preventing accidents.

[0015] 2. By providing a special limiting mechanism of a protrusion and a groove in the present utility model, the existence of this limiting mechanism will automatically lock, without the intervention of a large external force, and the footrest and the brake limit plate will not change their states. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the brake device of the present utility model in the relaxed state.

[0017] Figure 2 is Figure 1 the top view of

[0018] Figure 3 is a schematic diagram of the overall structure of the brake device of the present utility model in the braking working state.

[0019] Figure 4 is Figure 3 the top view of DETAILED DESCRIPTION OF THE INVENTION

[0020] The following will describe in detail the specific implementation manners of the embodiments of the present utility model in conjunction with the accompanying drawings. It should be understood that the specific implementation manners described herein are only for the purpose of illustration and explanation of the embodiments of the present utility model, and are not used to limit the embodiments of the present utility model.

[0021] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments may be combined with each other.

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0023] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0024] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the horizontal height of the first feature is less than that of the second feature.

[0026] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0027] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0028] Reference Figures 1 to 4 , a jack braking device of the present utility model includes a treadle 1, a brake limit plate 2, a steel wire rope 3, a brake lever 4, a brake block 5, and a roller 6. One end of the treadle 1 is movably hinged to a wall plate 8 on one side of the jack through a treadle shaft 7. The brake limit plate 2 is located below the treadle 1 and the brake limit plate 2 is movably hinged to the wall plate on the same side of the treadle through a limit plate shaft 9. One end of the steel wire rope 3 is arranged on the brake limit plate 2, and the other end is arranged at one end of the brake lever 4. The brake lever 4 is movably hinged to the wall plate 8. The brake block 5 is sleeved on the front wheel shaft 10 and there is a gap between the brake block 5 and the front wheel shaft 10. The roller 6 is movably hinged to the brake block 5. The brake lever 4 is located between the roller 6 and the front wheel shaft 10, and the upper and lower end faces of the brake lever 4 are always in contact with the outer surfaces of the roller 6 and the front wheel shaft 10.

[0029] A protrusion is arranged on one side of the treadle 1 close to the brake limit plate 2. A groove matching the protrusion is arranged on one side of the brake limit plate close to the treadle. And the lower end of the protrusion always abuts against the upper end face of the brake limit plate. By stepping on the treadle 1, the switching between the relaxed state and the working state of the jack braking device is realized.

[0030] In one embodiment, one end of the wire rope 3 is installed on the brake limit plate 2 through a first wire rope seat 31 and a first wire fixing sleeve 32; the other end of the wire rope 3 is installed on one end of the brake lever 4 through a second wire rope seat 33 and a second wire fixing sleeve 34.

[0031] In one embodiment, a wire sleeve 35 is provided on the wire rope 3; a wire rope positioning sleeve 36 is sleeved on the wire sleeve close to the brake limit plate, and a first wire retaining sleeve 37 is provided at one end of the wire rope positioning sleeve 36 away from the brake limit plate; a second wire retaining sleeve 38 is provided on the wire sleeve close to the brake lever, and a return spring 38 is sleeved on the wire rope between the second wire retaining sleeve 37 and the brake lever 4.

[0032] In one embodiment, the roller 6 is hinged to the brake block 5 through a roller shaft 61.

[0033] In one embodiment, the brake lever 4 is hinged to the wall panel 8 through a brake lever screw 41.

[0034] In one embodiment, it further includes a fixing block 11, the fixing block 11 is welded on the front wheel shaft 10, a screw 12 is provided at the upper end of the fixing block 11, a compression spring 13 is provided between the screw 12 and the fixing block 11, and one end of the screw 12 passes through a through hole at the top of the brake block 5 and is connected to the compression spring 13; one end of the compression spring 13 is fixedly provided on the fixing block 11, and the other end is fixedly provided on the screw 12.

[0035] In one embodiment, the footrest shaft 7 and the limit plate shaft 9 are respectively installed on the wall panel 8 through gaskets 14 and lock nuts 15.

[0036] During the process of the jack lifting a heavy object, the oil pump will be subjected to a large lateral thrust. The rear stop is provided to bear this thrust, and the rear stop is firmly combined with the wall panel by means of three-sided welding. Due to the need of the design position, the brake limit plate shaft needs to be welded on the rear stop.

[0037] The state of the jack when it is not in use or during the lifting process is:

[0038] The bottom surface A of the brake block is higher than the lowest surface of the front wheel. At this time, the brake system is not in a working state. At this time, due to the action of the return spring in the brake system, the brake limit plate and the footrest will be in Figure 1 the position of the brake relaxation state in.

[0039] When the jack is lifting the load to an appropriate position and needs to be maintained at that position, step on the pedal forcefully. The pedal will drive the brake limit plate to rotate. The brake limit plate will simultaneously pull the steel wire, and the steel wire will drive the brake lever at the other end of the steel wire to rotate. The other end of the brake lever will press on the roller hinged on the brake block, and the roller will drive the brake block to move downward. The anti-slip bottom surface of the brake block will contact the ground. When the special limit mechanism B between the foot pedal and the brake limit plate just matches, the special limit mechanism will automatically lock. Without the intervention of a large external force, the foot pedal and the brake limit plate will not change their states. At this time, the bottom surface of the brake block has been closely attached to the ground, and there is sufficient friction between the brake block and the ground to ensure that the jack does not move after lifting the load, thus preventing accidents from occurring.

[0040] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A jack brake device, characterized in that: It comprises a foot pedal, a brake limit plate, a steel wire rope, a brake rod, a brake block and a roller, one end of the foot pedal is movably hinged to a wall panel on one side of the jack through a foot pedal shaft, the brake limit plate is located below the foot pedal and the brake limit plate is movably hinged to the wall panel on the same side of the foot pedal through a limit plate shaft; one end of the steel wire rope is arranged on the brake limit plate, and the other end is arranged on one end of the brake rod, and the brake rod is movably hinged to the wall panel; the brake block is sleeved on the front wheel axle and there is a gap between the brake block and the front wheel axle; the roller is movably hinged on the brake block, the brake rod is located between the roller and the front wheel axle, and the upper and lower end surfaces of the brake rod are always in contact with the outer surfaces of the roller and the front wheel axle; A protrusion is provided on the side of the pedal close to the brake limit plate, and a groove used in conjunction with the protrusion is provided on the side of the brake limit plate close to the pedal, and the lower end of the protrusion is always in contact with the upper end surface of the brake limit plate. The jack brake device can be switched between the relaxed state and the working state by stepping on the pedal.

2. A jack brake device as claimed in claim 1, characterized in that: One end of the steel wire rope is installed on the brake limit plate through a first steel wire rope seat and a first steel wire fixing sleeve; the other end of the steel wire rope is installed on one end of the brake rod through a second steel wire rope seat and a second steel wire fixing sleeve.

3. A jack brake device as claimed in claim 1, characterized in that: A wire sleeve is provided on the wire rope; a wire rope positioning sleeve is provided on the wire sleeve close to the brake limit plate, and a first wire stop sleeve is provided on the end of the wire rope positioning sleeve away from the brake limit plate; a second wire stop sleeve is provided on the wire sleeve close to the brake rod, and a return spring is provided on the wire rope between the second wire stop sleeve and the brake rod.

4. A jack brake device as claimed in claim 1, characterized in that: The roller is hinged on the brake block through a roller shaft.

5. A jack brake device as claimed in claim 1, characterized in that: The brake lever is hinged to the wall plate via a brake lever screw.

6. A jack brake device as claimed in claim 1, characterized in that: It also includes a fixing block, which is welded to the front wheel axle. A screw is arranged at the upper end of the fixing block. A compression spring is arranged between the screw and the fixing block. One end of the screw passes through the through hole at the top of the brake block and is connected to the compression spring. One end of the compression spring is fixed to the fixing block, and the other end is fixed to the screw.

7. A jack brake device as claimed in claim 1, characterized in that: The footrest shaft and the limit plate shaft are respectively installed on the wall panel through gaskets and locking nuts.

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