Electric plunger sleeve mechanism

Abstract

The utility model discloses an electric plunger sleeve mechanism which comprises a first sleeve body provided with an oil inlet hole and a second sleeve body provided with an oil outlet hole, the side, away from the first sleeve body, of the second sleeve body is provided with a plunger spring installation part for installation of a plunger spring, a plunger sliding hole for movement of a plunger is formed in the second sleeve body in a penetrating mode, the first sleeve body is provided with an oil passing cavity communicated to the plunger sliding hole, and the oil passing cavity is communicated to the oil inlet hole. The side, close to the plunger sliding hole, of the oil passing cavity is connected with a check ring, the check ring is fixedly connected with a conical spring, the tail end of the conical spring is fixedly connected with a limiting concave disc, and the limiting concave disc abuts against a steel ball blocked at the oil inlet hole. The electric plunger sleeve can guide the steel ball and enable the steel ball to move in a reciprocating mode in the axis direction of the oil passing cavity, the situation that the conical spring is flanged to clamp the steel ball is avoided, and the stability of the electric plunger sleeve is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger sleeves, in particular to an electric plunger sleeve mechanism. Background Art

[0002] The hydraulic system adopted by the cab tilting system of heavy trucks consists of a hydraulic pump, a hydraulic cylinder, a hydraulic lock and connecting oil pipes. The hydraulic pump is the power source of the hydraulic system, and the output pressure of the hydraulic pump drives the hydraulic cylinder to complete the lifting and falling process of the cab. Among them, the plunger sleeve is a pressure output mechanism in the hydraulic pump. Compared with the traditional time-consuming and laborious manual plunger sleeve, the electric hydraulic pump using the electric plunger sleeve does not require manual operation. The electric plunger sleeve works based on the hydraulic principle. The motor presses the electric plunger, and the electric plunger sleeve absorbs and discharges liquid according to the pressure difference change in the chamber, and its working efficiency is higher than that of general hydraulic pumps. Therefore, so far, the application range of electric plunger hydraulic pumps is becoming increasingly wide, and the speed of its own development and innovation is extremely rapid.

[0003] However, the electric plunger sleeve inside the existing hydraulic pump generally uses a conical spring to connect with a steel ball. During the use of the electric plunger sleeve, the conical spring is prone to flanging and jamming the steel ball, resulting in the steel ball being unable to return to its position to seal the oil, and the phenomenon that the electric plunger sleeve does not work, causing the hydraulic pump to fail. Summary of the Utility Model

[0004] In order to solve the technical problem that the conical spring is prone to flanging and jamming the steel ball during the use of the electric plunger sleeve in the existing technology, resulting in the steel ball being unable to return to its position to seal the oil, and the phenomenon that the electric plunger sleeve does not work, causing the hydraulic pump to fail, the utility model provides the following technical solutions.

[0005] An electric plunger sleeve mechanism of the utility model includes a first sleeve body with an oil inlet hole and a second sleeve body with an oil outlet hole which are connected to each other. A plunger spring installation part for installing a plunger spring is provided on one side of the second sleeve body far away from the first sleeve body, and a plunger sliding hole for the plunger to move is provided through the second sleeve body. The first sleeve body is provided with an oil passing cavity communicating with the plunger sliding hole, the oil passing cavity communicates with the oil inlet hole, a retaining ring is connected to one side of the oil passing cavity close to the plunger sliding hole, a conical spring is fixedly connected to the retaining ring, a limiting concave disc is fixedly connected to the end of the conical spring, and the limiting concave disc abuts against a steel ball blocking the oil inlet hole.

[0006] As a further technical solution, a limiting sleeve is fixedly connected to the center of the retaining ring, and the other end of the limiting sleeve is fixedly connected to the limiting concave disc.

[0007] As a further technical solution, the axes of the retaining ring, the conical spring, the steel ball, the limiting concave disc and the limiting sleeve are on the same straight line.

[0008] As a further technical solution, a plurality of through holes are provided in the cylinder body of the limit sleeve.

[0009] As a further technical solution, the groove of the limit concave disc is a hemispherical surface matching the shape of the steel ball.

[0010] As a further technical solution, a plurality of oil passing holes for hydraulic oil to pass through are provided in the retaining ring.

[0011] The beneficial effects of the present utility model are as follows: after the first sleeve body and the second sleeve body of the present utility model are connected, the electric plunger can reciprocate in the plunger sliding hole. A steel ball is arranged on one side of the oil passing cavity to block the oil inlet hole, and a retaining ring is fixed on the other side of the oil passing cavity. The retaining ring is fixedly connected with a conical spring, and the other end of the conical spring is fixedly provided with a limit concave disc. The limit concave disc abuts against the steel ball, and then in cooperation with the limit sleeve, the steel ball can be guided and reciprocated along the axis direction of the oil passing cavity, preventing the situation that the conical spring turns over and jams the steel ball, and ensuring the stability of the electric plunger sleeve. Description of the Drawings

[0012] Figure 1 is an external schematic view of the electric plunger sleeve mechanism of the present utility model;

[0013] Figure 2 is an internal sectional schematic view of the electric plunger sleeve mechanism of the present utility model;

[0014] Figure 3 is a connection schematic view of the limit concave disc of the electric plunger sleeve mechanism of the present utility model;

[0015] In the figure: 1 - first sleeve body; 101 - oil inlet hole; 102 - oil passing cavity; 2 - second sleeve body; 201 - oil outlet hole; 202 - plunger spring installation part; 203 - plunger sliding hole; 3 - retaining ring; 301 - oil passing hole; 4 - conical spring; 5 - steel ball; 6 - limit concave disc; 7 - limit sleeve. Detailed Embodiments

[0016] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0017] In the description of the present utility model, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the 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 therefore should not be construed as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0018] As Figure 1 and Figure 2 shown, an electric plunger sleeve mechanism of the present utility model includes a first sleeve body 1 and a second sleeve body 2 connected to each other. The first sleeve body 1 is provided with an oil inlet hole 101, and the second sleeve body 2 is provided with an oil outlet hole 201. The electric plunger sleeve mechanism formed by connecting the first sleeve body 1 and the second sleeve body 2 is used for driving a plunger to reciprocate therein by an eccentric wheel motor to control the oil inlet and outlet. On one side of the second sleeve body 2 away from the first sleeve body 1, there is a plunger spring installation part 202 for installing a plunger spring. A plunger sliding hole 203 for the plunger to move is axially penetrated through the second sleeve body 2, and the motor drives the plunger to reciprocate in the plunger sliding hole 203.

[0019] As Figure 2 and Figure 3 shown, in a preferred embodiment, the first sleeve body 1 is provided with an oil passing cavity 102. After the first sleeve body 1 and the second sleeve body 2 are connected, the oil passing cavity 102 communicates with the plunger sliding hole 203, and the other end of the oil passing cavity 102 communicates with the oil inlet hole 101. One end of the oil inlet hole 101 is connected to an oil circuit, and a steel ball 5 is provided at one end of the oil inlet hole 101 close to the oil passing cavity 102, and the steel ball 5 can reciprocate. A retaining ring 3 is connected to one side of the oil passing cavity 102 close to the plunger sliding hole 203. After the first sleeve body 1 and the second sleeve body 2 are connected, the retaining ring 3 is fixed between the first sleeve body 1 and the second sleeve body 2.

[0020] The retaining ring 3 is fixedly connected with a conical spring 4. The retaining ring 3 is provided with a plurality of oil passing holes 301 for hydraulic oil to pass through, and the oil passing holes 301 are through holes. The end of the conical spring 4 away from the retaining ring 3 is fixedly connected with a limiting concave disc 6. The groove of the limiting concave disc 6 is a hemispherical surface matching the shape of the steel ball 5, and the limiting concave disc 6 abuts against the steel ball 5 blocking the oil inlet hole 101. Under the pressure in the electric plunger sleeve, the conical spring 4 reciprocates telescopically, the steel ball 5 and the limiting concave disc 6 reciprocate, and the limiting concave disc 6 can prevent the steel ball 5 from causing adverse effects on the conical spring 4 and prevent the situation that the conical spring 4 turns over and jams the steel ball 5, ensuring the stability of the electric plunger sleeve.

[0021] In a preferred embodiment, a limiting sleeve 7 is fixedly connected to the center of the retaining ring 3 in the direction towards the oil passage cavity 102, and the other end of the limiting sleeve 7 is fixedly connected to the limiting concave disc 6. The axes of the retaining ring 3, the conical spring 4, the steel ball 5, the limiting concave disc 6 and the limiting sleeve 7 are on the same straight line. Thus, the limiting sleeve 7 can guide the steel ball 5 and the limiting concave disc 6 to reciprocate in the axial direction, ensuring the stability of the electric plunger sleeve. A plurality of through holes are provided in the cylinder body of the limiting sleeve 7 for the flow of hydraulic oil. The limiting sleeve 7 is only used to ensure the axial movement of the limiting concave disc 6 and does not exert any pressure or resistance on the hydraulic oil.

[0022] The specific preferred embodiments and examples of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent replacements can be made without departing from the concept of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present invention.

Claims

1. An electric plunger sleeve mechanism, comprising a first sleeve body (1) provided with an oil inlet hole (101) and a second sleeve body (2) provided with an oil outlet hole (201) which are connected to each other, a plunger spring mounting portion (202) for mounting a plunger spring is provided on a side of the second sleeve body (2) away from the first sleeve body (1), and a plunger sliding hole (203) for movement of the plunger is penetrated through the second sleeve body (2), the first sleeve body (1) is provided with an oil passage chamber (102) connected to the plunger sliding hole (203), the oil passage chamber (102) is connected to the oil inlet hole (101), and a retaining ring (3) is connected to a side of the oil passage chamber (102) close to the plunger sliding hole (203), characterized in that: The retaining ring (3) is fixedly connected to a conical spring (4), the end of which is fixedly connected to a limiting recessed disk (6), and the limiting recessed disk (6) is tightly pressed against a steel ball (5) that blocks the oil inlet hole (101).

2. The electric plunger sleeve mechanism according to claim 1, characterized in that: The center of the retaining ring (3) is fixedly connected to a limiting sleeve (7), and the other end of the limiting sleeve (7) is fixedly connected to the limiting recessed disc (6).

3. The electric plunger sleeve mechanism according to claim 2, characterized in that: The axes of the retaining ring (3), the conical spring (4), the steel ball (5), the limiting concave disc (6) and the limiting sleeve (7) are on the same straight line.

4. The electric plunger sleeve mechanism according to claim 2, characterized in that: The cylinder body of the limiting sleeve (7) is provided with a plurality of through holes.

5. The electric plunger sleeve mechanism according to claim 1, characterized in that: The groove of the limiting concave disc (6) is a hemispherical surface matching the shape of the steel ball (5).

6. The electric plunger sleeve mechanism according to claim 1, characterized in that: The retaining ring (3) is provided with a plurality of oil holes (301) for hydraulic oil to pass through.

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