CN205222532U - Hydraulic pliers - Google Patents

Abstract

The utility model discloses a hydraulic caliper, which comprises a caliper body provided with an oil inlet and a brake unit, wherein the brake unit is composed of two opposite brake plate assemblies with gaps left in the middle, and the left brake plate assembly It is fixed with the caliper body, and the brake plate assembly on the right side is connected with the bushing. On the bushing, a sealing seat whose outer surface is in sealing fit with the inner cavity of the caliper is fixed. The sealing chamber formed by the sealing seat, the caliper body and the bushing is It communicates with the oil inlet; a disc spring is arranged between the bush and the caliper body; it is characterized in that: the bush is a split structure, the outside is a hollow bush, and the left end of the bush inner cavity is provided with a The right side of the push rod connected to the brake plate assembly is provided with a bolt that is externally connected to the bushing through threads and has at least a section of a hexagonal or irregularly shaped inner hole. The inner hole of the bolt is provided with a hexagonal Or an adjusting rod with an irregularly shaped inner hole. The utility model can adjust the stroke of the friction plate, has long service life and low cost.

Description

hydraulic pliers

technical field

The utility model relates to a hydraulic pliers, in particular to a hydraulic pliers for tower crane brakes.

Background technique

At present, hydraulic calipers are used for brakes of tower cranes. After the friction plate in the brake unit is worn out, the stroke cannot be adjusted. When the friction force cannot meet the braking requirements, it can only be replaced as a whole. The service life is short and the cost is high.

Utility model content

Aiming at the above-mentioned defects in the prior art, the utility model aims to provide a hydraulic pliers capable of adjusting the stroke of the friction plate, with long service life and low cost.

In order to achieve the above purpose, the utility model adopts the following technical solutions: it includes a caliper body provided with an oil inlet, and a brake unit, wherein the brake unit is composed of two sets of brake plate assemblies with gaps left in the middle, and the left side The brake plate assembly is fixed with the caliper body, the brake plate assembly on the right is connected with the bushing, and the sealing seat with the outer surface and the internal cavity of the caliper is fixed on the bushing, and the sealing seat is connected with the caliper body and the bushing. The formed sealing cavity communicates with the oil inlet; a disc spring is arranged between the bush and the pliers; it is characterized in that: the bush is a split structure, the outside is a hollow bush, and the inner cavity of the bush The left end is provided with a push rod connected with the brake plate assembly, and its right is provided with a bolt that is externally connected to the bushing through threads and has at least one section of a hexagonal or irregularly shaped inner hole. The inner hole of the bolt is provided with an outer surface and a The hexagonal or irregularly shaped inner hole of the bolt fits the adjusting rod.

The above-mentioned hydraulic pliers, wherein: the sealing seat is provided with a right sealing ring, and the caliper body opposite thereto is provided with a left sealing ring, and the inner surface of the left sealing ring is bonded and sealed with the surface of the bushing.

The above-mentioned hydraulic pliers, wherein: the left end of the inner cavity of the pliers body for accommodating the disc spring is provided with a dust cover integrally connected with the push rod.

The above-mentioned hydraulic pliers, wherein: the right side of the internal cavity of the pliers is an opening, and a thrust plate and a rubber cover fixed to the pliers body 1 are sequentially arranged at the opening.

Compared with the prior art, in the utility model, the bushing is made into a split structure, which is divided into a bushing, a push rod, a bolt, and an adjusting rod, so that the position of the bolt in the bushing can be freely adjusted by rotating the adjusting rod, so that the push rod Drive the brake plate assembly on the right to extend the appropriate stroke, so that the braking force can be adjusted freely, and it is also convenient to make up for the wear of the friction plate. It is not necessary to replace the friction plate due to slight wear and tear.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

In the figure: caliper body 1, braking unit 2, dust cover 3, disc spring 4, bolt 5, left sealing ring 6,

Right sealing ring 7, thrust plate 8, rubber cover 9, adjusting rod 10, sealing seat 11,

Bushing 12, push rod 13.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

As shown in the accompanying drawings, the hydraulic pliers of the present invention include a caliper body 1 provided with an oil inlet, and a braking unit 2, wherein the braking unit 2 is composed of two sets of brake plate assemblies with gaps left in the middle, Each brake plate assembly is composed of a friction plate and a friction plate supporting plate; the left brake plate assembly is fixed with the caliper body 1, and the right brake plate assembly is connected with the push rod 13, and the outside of the push rod 13 A bushing 12 is sleeved on the bushing, and a sealing seat 11 whose outer surface is tightly matched with the inner cavity of the caliper body 1 is fixed on the bushing. There is a left sealing ring 6, the inner surface of the left sealing ring is bonded and sealed with the surface of the bushing 12, therefore, the sealing seat 11, the left sealing ring 6, the right sealing ring 7, the caliper body 1 and the bushing 12 form a closed sealing chamber , communicated with the oil inlet; a disc spring 4 is arranged between the bush 12 and the caliper body 1; the right side of the push rod 13 is provided with an external thread connected to the bush 12 and has at least one section with a hexagonal or irregular shape The bolt 5 in the inner hole is provided with an adjusting rod 10 whose outer surface cooperates with the hexagonal or irregularly shaped inner hole of the bolt, and the adjusting rod 10 acts similar to a hexagonal wrench. In this embodiment, the left end of the inner hole of the bolt 5 is a round hole, and a part of the right end and the adjusting rod 10 adopt a hexagonal fit. The right side of the inner cavity of the pliers body 1 is an opening, and the fixed thrust plate 8 and the rubber cover 9 of the pliers body 1 are provided, so that it is convenient to open and adjust the push rod stroke. The left end of the inner cavity of the pliers body 1 containing the disc spring 4 is provided with a dust cover 3 integrated with the push rod 13, which can effectively prevent dust from entering and affecting the continuous operation of the product.

The working principle of the utility model is briefly described below in conjunction with the accompanying drawings of the utility model.

When there is no oil-in command, the brake plate assembly on the right side, together with the brake plate assembly on the left side, tightly hugs the parts to be braked under the elastic force of the disc spring 4 to achieve the braking effect.

After the oil inlet command is turned on, the external high-pressure oil enters the sealing cavity formed by the sealing seat 11, the left sealing ring 6, the right sealing ring 7, the caliper body 1 and the bushing 12 through the oil inlet, and the high-pressure oil pushes the sealing seat 11 Overcome the elastic force of disc spring 4, drive bolt 5 and push rod 13 to move to the right together, the brake plate assembly on the right side is away from the brake plate assembly on the left side, no longer hug tightly, and the brake state is released.

The working principle of the utility model is that the oil brake is blocked, and the oil is released. If the utility model is slightly deformed, the oil-through brake can be realized, and the oil-free brake can be released, which should also be within the protection scope of the utility model.

Claims (4)

1. A hydraulic caliper, comprising a caliper body (1) provided with an oil inlet, and a brake unit (2), wherein the brake unit (2) is composed of two sets of opposite brake plate assemblies with gaps in the middle, The left brake plate assembly is fixed to the caliper body (1), and the right brake plate assembly is connected to the bushing (12), on which a seal is fixed on the outer surface and the inner cavity of the caliper body (1). Seat (11), the seal seat and the sealing cavity formed by the caliper body (1) and the bushing (12) communicate with the oil inlet; a disc spring is arranged between the bushing (12) and the caliper body (1) (4); It is characterized in that: the bush (12) is a split structure, the outside is a hollow bush (12), and the left end of the bush inner cavity is provided with a push rod (13) connected with the brake plate assembly ), the right side of which is provided with a bolt (5) whose exterior is connected to the bushing (12) through threads and has at least a section of a hexagonal or irregularly shaped inner hole. The inner hole of the bolt is provided with a hexagonal or An adjusting rod (10) fitted with an irregularly shaped inner hole. 2. The hydraulic pliers according to claim 1, characterized in that: the sealing seat (11) is provided with a right sealing ring (7), and the opposite caliper body (1) is provided with a left sealing ring (6 ), the inner surface of the left sealing ring is bonded and sealed with the surface of the bushing (12). 3. The hydraulic pliers according to claim 2, characterized in that: the left end of the inner cavity of the pliers body (1) containing the disc spring (4) is provided with a dust cover connected with the push rod (13) (3). 4. The hydraulic pliers according to any one of the above claims, characterized in that: the right side of the inner cavity of the pliers body (1) is an opening, and thrust plates fixed to the pliers body (1) are sequentially arranged at the openings (8) and rubber cover (9).