CN216044776U

CN216044776U - Ejector rod for hydraulic tool

Info

Publication number: CN216044776U
Application number: CN202122833484.6U
Authority: CN
Inventors: 张国华; 陈春林
Original assignee: Yuhuan Jielite Tool Co ltd
Current assignee: Yuhuan Jielite Tool Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-03-15
Anticipated expiration: 2031-11-18

Abstract

The utility model provides a push rod for a hydraulic tool, and belongs to the technical field of hydraulic tool accessories. The ejector rod solves the problems that the existing ejector rod for the hydraulic tool is low in yield, short in service life and the like. The ejector rod for the hydraulic tool comprises a straight rod-shaped body, wherein an axially convex protruding part is arranged at the center of an inner end face of the body, and the protruding part is provided with a spherical sealing face. The utility model has the advantages of high yield, good sealing performance, long service life and the like.

Description

Ejector rod for hydraulic tool

Technical Field

The utility model belongs to the technical field of hydraulic tool accessories, and particularly relates to an ejector rod for a hydraulic tool.

Background

The hydraulic tool is a device organically combining a hydraulic system into a common tool, converts strong hydraulic power into mechanical motions such as reciprocating linear motion, rotary motion and cycloid motion, and has the advantages of high efficiency, convenience and the like.

For example, chinese patent document discloses a pressure relief mechanism for a hydraulic tool [ application number: 202021499440.3, respectively; authorization notice number: CN213144950U ], which is located at the lower part of the oil return path of the oil cylinder, and comprises a shaft sleeve fixed in the casing of the hydraulic tool, wherein a push rod passes through the shaft sleeve, the top of the push rod is provided with a thimble, the push rod is sleeved with a pressure spring, the pressure spring presses the bottom of the shaft sleeve, the lower part of the push rod is provided with a triangular hole, the bevel edge of the triangular hole is arc-shaped, the lower part of the triangular hole is rotatably connected with a pressure rod, the end part of the pressure rod is provided with a pull pin, and the pull pin is inserted into the triangular hole.

Foretell hydraulic tool pressure release mechanism can improve the operating efficiency of ejector pin, but the thimble at ejector pin top is sealed for the conical surface, and is required high to the fit tolerance, and the precision will be controlled in several silks for the processing degree of difficulty of thimble is big, and the yield is low, and in the use, the ejector pin takes place slight bending or not drives the thimble with the vertical direction and seals moreover, will cause thimble unilateral wearing and tearing, leads to sealed inefficacy, and life is short.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provide the ejector rod for the hydraulic tool, which has high yield, good sealing performance and long service life.

The purpose of the utility model can be realized by the following technical scheme: the ejector rod for the hydraulic tool comprises a straight rod-shaped body and is characterized in that an axially convex protruding part is arranged in the center of an inner end face of the body, and the protruding part is provided with a sealing face which is a spherical surface.

In the push rod for the hydraulic tool, the center of the inner end surface of the body is embedded with the ball, and the part of the ball axially protruding out of the end surface of the body is a protruding part.

In the above-mentioned ram for a hydraulic tool, the inner end portion of the body is a reduced diameter section having an outer diameter smaller than the outer diameter of the body.

In the above-mentioned ejector rod for hydraulic tool, the joint of the reducing section and the body is provided with a circle of convex ring which protrudes radially outwards.

In the ram for a hydraulic tool, the body has an annular groove at a middle portion thereof.

In the push rod for the hydraulic tool, the outer wall of the outer end part of the body is provided with an annular clamping groove.

Compared with the prior art, the ejector rod for the hydraulic tool is convenient to manufacture, high in yield, good in sealing performance, good in compression resistance and bearing capacity and long in service life.

Drawings

Fig. 1 is a perspective view of the ram for a hydraulic tool.

Fig. 2 is a sectional view showing the structure of the carrier rod for the hydraulic tool.

In the figure, 1, a body; 2. a projection; 3. a sphere; 4. a reducing section; 5. a convex ring; 6. an annular groove; 7. a clamping groove.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, the push rod for hydraulic tool comprises a straight rod-shaped body 1, wherein the center of the inner end surface of the body 1 is provided with a convex part 2 protruding axially outwards, and the convex part 2 is provided with a sealing surface which is spherical.

When the ejector rod for the hydraulic tool is used, the sealing surface of the convex part 2 is used for sealing the oil hole, and the convex part 2 can automatically find the center and automatically compensate the position because the sealing surface is a spherical surface, so that no gap exists between the sealing surface and the oil hole when sealing is carried out, the sealing effect is good, the compression and bearing of the spherical sealing surface are good, the condition of unilateral stress abrasion is avoided, and the service life is long; in addition, the ejector rod for the hydraulic tool has the functions of automatically finding the center and automatically supplementing the position for the spherical sealing surface, so that the processing requirements on the high verticality of the body 1 and the high coaxiality of the convex part 2 and the body 1 are reduced, the matching tolerance requirement is reduced, the processing difficulty of the ejector rod for the hydraulic tool is small, and the yield is high.

In more detail, a sphere 3 is embedded in the center of the inner end face of the body 1, and a protrusion part 2 is arranged at the part of the sphere 3 axially protruding out of the end face of the body 1. Spheroid 3 is purchase spare, inlays spheroid 3 in the terminal surface center in the body 1, and later the riveting makes the terminal surface be formed with the throat with 3 edge cladding of spheroid in the body 1 tip, and spheroid 3 location is firm, and the processing degree of difficulty is low like this, and it is convenient to make, and the yield is high.

The inner end part of the body 1 is a reducing section 4 with the outer diameter smaller than that of the body 1, so that the inner end part of the body 1 can be clamped and positioned conveniently, and the convex part 2 can be machined conveniently; a circle of convex rings 5 which protrude outwards in the radial direction are arranged at the joint of the reducing section 4 and the body 1, the convex rings 5 are convenient for the clamping and positioning of the reducing section 4, and the convex rings 5 are abutted by springs, so that the body 1 is stable in displacement and stable in work; the middle part of the body 1 is provided with an annular groove 6, and the annular groove 6 is used for embedding a sealing ring, so that the sealing property of the outer wall of the body 1 is ensured, and oil leakage is avoided; the outer wall of the outer end part of the body 1 is provided with an annular clamping groove 7, and the clamping groove 7 is convenient for the clamping spring to be embedded.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The ejector rod for the hydraulic tool comprises a straight rod-shaped body (1) and is characterized in that an axially convex protruding part (2) is arranged in the center of an inner end face of the body (1), and the protruding part (2) is provided with a sealing face which is a spherical face.

2. The ejector rod for the hydraulic tool as recited in claim 1, wherein the center of the inner end surface of the body (1) is embedded with a ball (3), and the part of the ball (3) axially protruding out of the end surface of the body (1) is a protrusion (2).

3. A ram for a hydraulic tool as set forth in claim 2, characterized in that the inner end of the body (1) is a reduced diameter section (4) having an outer diameter smaller than the outer diameter of the body (1).

4. A ram for a hydraulic tool as set forth in claim 3, characterized in that the junction between the reducing section (4) and the body (1) has a radially outwardly projecting bead (5).

5. Ram for a hydraulic tool, according to claim 4, characterised in that said body (1) has an annular groove (6) in its middle.

6. A ram for a hydraulic tool as in claim 5, characterized in that the outer wall of the outer end of the body (1) is provided with a ring-shaped groove (7).