Hand-drive block braking device

Abstract

The utility model relates to the technical field of brake devices, in particular to a hand-drive block brake device which comprises a hand-drive block body, a drive chain and a transmission shaft, one side of the hand-drive block body is fixedly connected with a brake shell, and the inner side of the brake shell is provided with a main oil cylinder which is horizontally arranged and is hollow inside. The outer side of the main oil cylinder is fixedly connected with an auxiliary oil cylinder penetrating through the inner side of the main oil cylinder, the inner side of the auxiliary oil cylinder is slidably connected with a piston, one end of the piston is fixedly connected with a limiting rod penetrating through the auxiliary oil cylinder, and the end, away from the piston, of the limiting rod is fixedly connected with a brake pad. One end of the main oil cylinder is rotatably connected with a rotary joint communicated with the main oil cylinder, and the outer side of the rotary joint is fixedly connected with a fixing rod. According to the manual chain block, through the arrangement of the brake shell, the main oil cylinder, the auxiliary oil cylinder, the piston, the limiting rod, the brake piece, the rotary joint, the fixing rod, the oil conveying pipe and the hydraulic pump, the brake effect of the manual chain block is more ideal; and braking is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of brake devices, in particular to a manual hoist brake device. Background Art

[0002] Manual hoist, also known as hand chain hoist or lever hoist, is a light and small manual lifting machinery, mainly used for lifting, traction, fixing and carrying heavy objects. Manual hoist has compact structure and easy operation. It is suitable for various occasions such as factories, mines, construction sites, farmlands, etc. It can be used in conjunction with various types of hand chain hoists and lever hoists. The working principle of manual hoist is to pull the chain or pull the handle by manpower to drive the internal gears and worm mechanism to achieve the lifting or traction of heavy objects. Manual hoist has the advantages of small size, light weight, easy to carry, simple operation, safety and reliability.

[0003] The braking mechanism of the existing manual hoist generally adopts the traditional friction brake mechanism with separated ratchet friction plate. However, the friction braking effect of the single friction plate is not ideal, and it is not convenient when braking is needed. Since the manual hoist is usually cast iron, the heat dissipation effect is poor. If it is used for a long time or encounters an emergency stop or release, the braking mechanism of the manual hoist may overheat, affecting the braking effect, which is quite dangerous. Therefore, a manual hoist braking device is proposed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a manual hoist braking device to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A manual hoist braking device comprises a manual hoist body, a drive chain and a transmission shaft, wherein a brake shell is fixedly connected to one side of the manual hoist body, a main oil cylinder which is horizontally arranged and hollow inside is provided on the inner side of the brake shell, a secondary oil cylinder which is connected to the inner side of the main oil cylinder is fixedly connected to the outer side of the main oil cylinder, a piston is slidably connected to the inner side of the secondary oil cylinder, a limiting rod which passes through the secondary oil cylinder is fixedly connected to one end of the piston, a brake pad is fixedly connected to the end of the limiting rod away from the piston, one end of the main oil cylinder is rotatably connected to a rotary joint which passes through the main oil cylinder, a fixing rod is fixedly connected to the outer side of the rotary joint, an oil pipe which passes through the rotary joint is fixedly connected to the end of the rotary joint away from the main oil cylinder, and a hydraulic pump which passes through the oil pipe is fixedly connected to the end of the oil pipe which passes through the rotary joint.

[0007] Preferably, the outer side of the brake shell is provided with an air vent which penetrates the brake shell and is arranged obliquely, and one side of the auxiliary oil cylinder is provided with a fan blade which is fixedly connected to the outer side of the main oil cylinder.

[0008] Preferably, the number of the air holes is several and the air holes are distributed in an array on the outside of the brake housing, and the number of the fan blades is five and the fan blades are distributed in an array on the outside of the main oil cylinder.

[0009] Preferably, one end of the main oil cylinder away from the rotary joint is fixedly connected to the transmission shaft, the number of the auxiliary oil cylinders is five, the auxiliary oil cylinders are distributed in an array on the outside of the main oil cylinder, the outer side of the piston fits tightly with the inner side of the auxiliary oil cylinder, and the number of the pistons and limit rods is the same as the number of the auxiliary oil cylinders.

[0010] Preferably, one end of the fixing rod away from the rotary joint is fixedly connected to the brake housing, and the number of the fixing rods is six.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. In the utility model, the brake housing, main oil cylinder, auxiliary oil cylinder, piston, limit rod, brake pad, swivel joint, fixed rod, oil pipeline and hydraulic pump are provided, so that the braking effect of the manual hoist is more ideal and the braking is more convenient. When the manual hoist body needs to be braked, the hydraulic pump is started, and the hydraulic pump pumps hydraulic oil into the main oil cylinder through the oil pipeline. The hydraulic oil causes the piston to move outward, and the piston squeezes the limit rod and the brake pad to move outward, so that the brake pad fits tightly with the inner side of the brake housing. Due to the friction between the brake pad and the inner side of the brake housing, the transmission shaft is forced to stop rotating, and the manual hoist body can be braked;

[0013] 2. In the utility model, the ventilation holes and fan blades are provided to dissipate heat for the brake device of the manual hoist body. When the manual hoist body is used, it is necessary to adjust the object by using a drive chain. At this time, the transmission shaft will rotate, thereby driving the main oil cylinder, the auxiliary oil cylinder, the piston, the limit rod, the brake pad and the rotary joint to rotate. The fan blades can discharge the heat inside the brake shell through the ventilation holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the disassembled structure of the brake housing of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the brake assembly of the utility model.

[0017] In the figure: 1. Manual hoist body; 2. Drive chain; 3. Transmission shaft; 4. Brake housing; 5. Main oil cylinder; 6. Auxiliary oil cylinder; 7. Piston; 8. Limit rod; 9. Brake pad; 10. Rotary joint; 11. Fixed rod; 12. Oil pipeline; 13. Hydraulic pump; 14. Air vent; 15. Fan blade. DETAILED DESCRIPTION

[0018] 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.

[0019] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0020] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0021] See also Figure 1-3 , the utility model provides a technical solution:

[0022] A manual hoist braking device comprises a manual hoist body 1, a drive chain 2 and a transmission shaft 3, a brake shell 4 is fixedly connected to one side of the manual hoist body 1, a main oil cylinder 5 which is horizontally arranged and hollow inside is provided on the inner side of the brake shell 4, a secondary oil cylinder 6 which is connected to the inner side of the main oil cylinder 5 is fixedly connected to the outer side of the main oil cylinder 5, a piston 7 is slidably connected to the inner side of the secondary oil cylinder 6, a limiting rod 8 which passes through the secondary oil cylinder 6 is fixedly connected to one end of the piston 7, a brake pad 9 is fixedly connected to the end of the limiting rod 8 away from the piston 7, a rotary joint 10 which passes through the main oil cylinder 5 is rotatably connected to one end of the main oil cylinder 5, a fixing rod 11 is fixedly connected to the outer side of the rotary joint 10, an oil pipe 12 which passes through the rotary joint 10 is fixedly connected to the end of the rotary joint 10 away from the main oil cylinder 5, and a hydraulic pump 13 which passes through the oil pipe 12 is fixedly connected to the end of the oil pipe 12 away from the rotary joint 10.

[0023] An air vent 14 is provided on the outside of the brake housing 4, which passes through the brake housing 4 and is obliquely arranged. A fan blade 15 is provided on one side of the auxiliary oil cylinder 6 and is fixedly connected to the outside of the main oil cylinder 5. There are several air vents 14, and the air vents 14 are distributed in an array on the outside of the brake housing 4. There are five fan blades 15, and the fan blades 15 are distributed in an array on the outside of the main oil cylinder 5. The end of the main oil cylinder 5 away from the rotary joint 10 is fixedly connected to the transmission shaft 3. There are five auxiliary oil cylinders 6, and the auxiliary oil cylinders 6 are distributed in an array on the outside of the main oil cylinder 5. The outer side of the piston 7 is tightly fitted with the inner side of the auxiliary oil cylinder 6. The number of the piston 7 and the limit rod 8 is the same as the number of the auxiliary oil cylinder 6. The end of the fixing rod 11 away from the rotary joint 10 is fixedly connected to the brake housing 4, and the number of the fixing rod 11 is six.

[0024] Working process: Power on the equipment before use. When using the manual hoist body 1, it is necessary to use the drive chain 2 to adjust the object. At this time, the transmission shaft 3 will rotate, thereby driving the main oil cylinder 5, the auxiliary oil cylinder 6, the piston 7, the limit rod 8, the brake pad 9 and the rotary joint 10 to rotate. The fan blades 15 absorb the cold air from the outside through the air vents 14. The cold air passes through the inner side of the brake shell 4 and discharges its heat, thereby improving the heat dissipation performance of the braking device of the manual hoist body 1. When the manual hoist body 1 needs to be braked, start the hydraulic pump 13. The hydraulic pump 13 pumps hydraulic oil into the main oil cylinder 5 through the oil pipe 12. The hydraulic oil causes the piston 7 to move outward. Due to the limitation of the auxiliary oil cylinder 6, the piston 7 squeezes the limit rod 8 and the brake pad 9 to move outward, so that the brake pad 9 is tightly fitted with the inner side of the brake shell 4. Due to the friction between the brake pad 9 and the inner side of the brake shell 4, the transmission shaft 3 is forced to stop rotating, and the braking of the manual hoist body 1 can be completed.

[0025] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. The standard parts used in this utility model can be purchased from the market, and the special-shaped parts can be customized according to the description and the drawings. The specific connection methods of each part adopt the conventional means such as bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0026] 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. A manual hoist braking device, comprising a manual hoist body (1), a drive chain (2) and a transmission shaft (3), characterized in that: A brake housing (4) is fixedly connected to one side of the manual hoist body (1); a main oil cylinder (5) which is horizontally arranged and hollow inside is provided inside the brake housing (4); a secondary oil cylinder (6) which penetrates the inside of the main oil cylinder (5) is fixedly connected to the outside of the main oil cylinder (5); a piston (7) is slidably connected to the inside of the secondary oil cylinder (6); one end of the piston (7) is fixedly connected to a limit rod (8) which penetrates the secondary oil cylinder (6); and the end of the limit rod (8) which is away from the piston (7) is fixedly connected to the piston (7). A brake pad (9) is connected, one end of the main oil cylinder (5) is rotatably connected to a rotary joint (10) that penetrates the main oil cylinder (5), a fixed rod (11) is fixedly connected to the outside of the rotary joint (10), one end of the rotary joint (10) away from the main oil cylinder (5) is fixedly connected to an oil delivery pipe (12) that penetrates the rotary joint (10), and one end of the oil delivery pipe (12) away from the rotary joint (10) is fixedly connected to a hydraulic pump (13) that penetrates the oil delivery pipe (12).

2. A manual hoist brake device according to claim 1, characterized in that: The outer side of the brake housing (4) is provided with an air vent (14) which penetrates the brake housing (4) and is arranged obliquely, and one side of the auxiliary oil cylinder (6) is provided with a fan blade (15) which is fixedly connected to the outer side of the main oil cylinder (5).

3. A manual hoist brake device according to claim 2, characterized in that: The number of the air holes (14) is a plurality, and the air holes (14) are distributed in an array outside the brake housing (4). The number of the fan blades (15) is five, and the fan blades (15) are distributed in an array outside the main oil cylinder (5).

4. A manual hoist brake device according to claim 1, characterized in that: One end of the main oil cylinder (5) away from the rotary joint (10) is fixedly connected to the transmission shaft (3), the number of the auxiliary oil cylinders (6) is five, and the auxiliary oil cylinders (6) are distributed in an array outside the main oil cylinder (5), the outer side of the piston (7) is tightly fitted with the inner side of the auxiliary oil cylinder (6), and the number of the piston (7) and the limit rod (8) is the same as the number of the auxiliary oil cylinders (6).

5. A manual hoist brake device according to claim 1, characterized in that: One end of the fixing rod (11) away from the rotating joint (10) is fixedly connected to the brake housing (4), and the number of the fixing rods (11) is six.

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