CN110388460A - Hydraulic cylinder with concave bottom - Google Patents

Abstract

The invention relates to a hydraulic cylinder with a concave cylinder bottom, including a cylinder body and a cylinder bottom. The concave part that transitions in the middle of the cylinder bottom entity and is recessed into the working space in the cylinder body, the concave part is characterized in that the recessed depth is greater than 5 mm; the present invention is used to improve product loading reliability and reduce Product manufacturing costs.

Description

Hydraulic cylinder with concave bottom

technical field

The application of the hydraulic cylinder with a concave cylinder bottom of the present invention mainly involves bearing and loading conditions, especially the large-area loading application of the static load test self-balancing method of pile foundations; its manufacturing technology mainly involves mechanical manufacturing, especially the professional technology of metal deformation processing field.

Background technique

The cylinder bottom of a common hydraulic cylinder is generally flat. When working under specific working conditions, for example, when the local strength of the loading contact surface of the cylinder bottom is weak and the rigidity of the cylinder bottom is insufficient, the flat cylinder bottom may be under internal hydraulic pressure. Under the action, there is a tendency of outward convex deformation, resulting in tensile stress inside the cylinder bottom entity, resulting in damage to the relevant structure of the hydraulic cylinder bottom.

Contents of the invention

In order to improve the shortcomings of the hydraulic cylinder with a flat cylinder bottom, improve the loading reliability and reduce the working cost, the invention provides a hydraulic cylinder with a concave cylinder bottom.

The hydraulic cylinder with a concave cylinder bottom of the present invention includes a cylinder body and a cylinder bottom, wherein the cylinder bottom is characterized in that it is plate-shaped, sealed at one end of the inner working space of the cylinder body, and has a direction from the edge of the cylinder bottom entity to the middle of the cylinder bottom entity. A concave part with a transitional direction and recessed into the working space in the cylinder body; the concave part is characterized in that the depth of the recess is greater than 5 mm.

In some embodiments of the hydraulic cylinder with a concave cylinder bottom of the present invention, the cylinder bottom is connected to the inner wall of the working space in the cylinder.

In some embodiments of the hydraulic cylinder with a concave cylinder bottom of the present invention, a hydraulic interface is made on the cylinder bottom, and the hydraulic interface is characterized in that it is located in the center of the area surrounded by the concave part, and loads the loading chamber of the hydraulic cylinder with the outside world. The system is connected.

The hydraulic cylinder with a concave cylinder bottom of the present invention has the beneficial effects that: when the hydraulic cylinder is loaded, when the concave shape of the cylinder bottom partially produces an outward deformation tendency, compressive stress is generated in a part or all of the cylinder bottom entity, and for the cylinder bottom In itself, the internal compressive stress of the cylinder bottom entity can effectively avoid the tensile stress damage of the cylinder bottom material; for the outer edge of the cylinder bottom entity, the internal compressive stress of the cylinder bottom entity can improve the connection strength between the cylinder bottom and the inner wall of the working space in the cylinder body; for In the central position of the area surrounded by the concave part, the internal pressure stress of the cylinder bottom entity can improve the sealing performance of the hydraulic interface at this position.

Description of drawings

Fig. 1 is one embodiment of the present invention: a schematic structural view of a circular plunger cylinder; Fig. 2 is a structural schematic view of an embodiment of the present invention: an annular bladder hydraulic cylinder.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings of the description.

Referring to Fig. 1 and Fig. 2, the hydraulic cylinder with a concave cylinder bottom includes a cylinder body 1 and a cylinder bottom 2. The cylinder bottom 2 is plate-shaped and is sealed at one end of the inner working space 3 of the cylinder body 1. The ejection of the hydraulic cylinder The components are located at the other end of the inner working space 3 of the cylinder body 1; the cylinder bottom 2 has a concave part that is recessed into the working space 3 in the cylinder body 1 and transitions from the direction of the solid edge of the cylinder bottom 2 to the solid middle of the cylinder bottom 2 4. The recessed depth of the concave part 4 is greater than 5 mm; the cylinder bottom 2 is connected to the inner wall of the working space 3 in the cylinder body 1; the cylinder bottom 2 is made with a hydraulic interface 5, and the hydraulic interface 5 is surrounded by the concave part 4 The central position of the area connects the loading chamber of the hydraulic cylinder with the external loading system.

The hydraulic cylinder with a concave cylinder bottom of the present invention works as follows: when the hydraulic cylinder is loaded, when the concave part 4 of the cylinder bottom 2 has a deformation tendency to protrude outward, it will cause compressive stress in the cylinder bottom 2 entity, and for the cylinder bottom 2 itself, the internal compressive stress of the cylinder bottom 2 entity can effectively avoid the tensile stress damage of the cylinder bottom 2 material; for the outer edge of the cylinder bottom 2 entity, the internal compressive stress of the cylinder bottom 2 entity can improve the working space between the cylinder bottom 2 and the cylinder body 1 The connection strength of the inner wall; for the central position of the area surrounded by the concave part 4, the solid internal pressure stress of the cylinder bottom 2 can improve the sealing performance of the hydraulic interface 5 at this position.

The above description of the implementation mode based on the embodiment shown in the accompanying drawings is not intended to limit the scope of the present invention. On the premise of not departing from the design spirit of the present invention, ordinary engineers and technicians in related fields may make various modifications to the technical solution of the present invention. , improvement and application, all should fall within the scope of protection determined by the claims of the present invention.

Claims (3)

1. A hydraulic cylinder with a concave cylinder bottom, including a cylinder body (1) and a cylinder bottom (2). The cylinder bottom (2) is characterized in that it is plate-shaped and covers the inner working space of the cylinder body (1) One end of (3) has a concave part (4) that transitions from the direction of the solid edge of the cylinder bottom (2) to the solid middle of the cylinder bottom (2) and is recessed into the working space (3) in the cylinder body (1) , the concave part (4), characterized in that: the concave depth is greater than 5 mm. 2. The hydraulic cylinder with a concave cylinder bottom according to claim 1, characterized in that: the cylinder bottom (2) is connected to the inner wall of the working space (3) in the cylinder body (1). 3. The hydraulic cylinder with a concave cylinder bottom according to claim 1, characterized in that: a hydraulic interface (5) is made on the cylinder bottom (2), and the hydraulic interface (5) is characterized in that it is located at The central position of the area surrounded by the concave part (4) connects the loading chamber of the hydraulic cylinder with the external loading system.