阅读说明：本技术 半轴油封装配工装 (Semi-axis oil seal assembly fixture ) 是由 覃健 蓝俊 陈媛媛 曹霞 施文爱 黄芝刚 黄育荣 何宾 吴良津 覃江华 覃伟涛 于 2020-04-30 设计创作，主要内容包括：一种半轴油封装配工装,涉及一种油封装配工装,包括定位导向筒、半轴轴管、滑块、凸轮旋转机构,定位导向筒内孔一端为光孔,另一端为内螺纹孔,并在光孔与内螺纹孔之间设有限位台阶；半轴轴管端部设有用于台阶孔,半轴轴管端部外圆上还设有与定位导向筒的内螺纹孔相连接的外螺纹；滑块装配于定位导向筒的光孔中且可沿定位导向筒的光孔作往复活塞运动,滑块的一端端部安装有所述的半轴油封；凸轮旋转机构的固定端与定位导向筒固定连接,凸轮旋转机构的旋转端顶压在滑块的另一端端面上。本发明采用的是凸轮旋转机构驱动滑块运动,操作起来省力方便,还具有定位精准、避免对半轴油封及半轴轴管造成损伤、维修成本低、结构可靠的特点,易于推广使用。(A half shaft oil seal assembly tool relates to an oil seal assembly tool, and comprises a positioning guide cylinder, a half shaft tube, a slide block and a cam rotating mechanism, wherein one end of an inner hole of the positioning guide cylinder is a unthreaded hole, the other end of the inner hole of the positioning guide cylinder is an inner threaded hole, and a limiting step is arranged between the unthreaded hole and the inner threaded hole; the end part of the half shaft tube is provided with a step hole, and the outer circle of the end part of the half shaft tube is also provided with an external thread connected with the internal thread hole of the positioning guide cylinder; the slide block is assembled in the unthreaded hole of the positioning guide cylinder and can do reciprocating piston motion along the unthreaded hole of the positioning guide cylinder, and the half shaft oil seal is installed at one end part of the slide block; the fixed end of the cam rotating mechanism is fixedly connected with the positioning guide cylinder, and the rotating end of the cam rotating mechanism is pressed against the end face of the other end of the sliding block. The invention adopts the cam rotating mechanism to drive the sliding block to move, saves labor and is convenient to operate, has the characteristics of accurate positioning, low maintenance cost and reliable structure, avoids damage to the half-shaft oil seal and the half-shaft tube, and is easy to popularize and use.)

1. The utility model provides a semi-axis oil blanket assembly fixture for install semi-axis oil blanket (4) in the step hole of semi-axis central siphon (5) tip, including location guide cylinder (1), its characterized in that: one end of an inner hole of the positioning guide cylinder (1) is provided with a unthreaded hole (101), the other end of the inner hole is provided with an internal threaded hole (103), and a limiting step (102) is arranged between the unthreaded hole (101) and the internal threaded hole (103); the excircle of the end part of the half shaft tube (5) is also provided with an external thread, and the internal thread hole (103) of the positioning guide cylinder (1) is in threaded connection with the excircle of the end part of the half shaft tube (5); the half shaft oil seal assembly tool further comprises a sliding block (2) and a cam rotating mechanism (3); the slide block (2) is assembled in the unthreaded hole (101) of the positioning guide cylinder (1) and can do reciprocating piston motion along the wall of the unthreaded hole of the positioning guide cylinder (1), and the half-shaft oil seal (4) is installed at the end part of one end of the slide block (2); the fixed end of the cam rotating mechanism (3) is fixedly connected with the positioning guide cylinder (1), and the rotating end of the cam rotating mechanism (3) is pressed against the end face of the other end of the sliding block (2).

2. The half shaft oil seal assembling tool according to claim 1, characterized in that: the cam rotating mechanism (3) comprises a cam (301), a cam pin (302) and a cam handle (303), a pin hole is machined in the center of a base circle of the cam (301), the cam pin (302) penetrates through the pin hole in the cam (301), the cam (301) is installed on the guide positioning cylinder (1), the cam (301) is pressed on the end face of the sliding block (2), one end of the cam handle (303) is fixedly connected with the cam (301), and the other end of the cam handle (303) extends out of the guide positioning cylinder (1) so as to be operated.

3. The half shaft oil seal assembling tool according to claim 2, characterized in that: the cam is an involute cam.

4. The half shaft oil seal assembling tool according to claim 1, 2 or 3, characterized in that: the sliding block (2) is provided with a first step excircle (201), a second step excircle (202) and a third step excircle (203), wherein the diameters of the first step excircle, the second step excircle and the third step excircle are gradually reduced; the surface of the first step excircle (201) is matched with the unthreaded hole wall of the positioning guide cylinder (1) in a reciprocating piston motion manner, the diameter of the second step excircle (202) of the sliding block (2) is smaller than the inner diameter of the limiting step of the positioning guide cylinder (1) and the inner diameter of the step hole of the end part of the half shaft tube (5), the half shaft oil seal (4) is arranged on the third step excircle of the sliding block (2), and the diameter of the third step excircle (203) is smaller than the inner diameter of the middle hole of the half shaft tube (5).

Technical Field

The invention relates to an oil seal assembly tool, in particular to a half shaft oil seal assembly tool.

Background

Among the typical commercial car rear axle assembly wheel end structure, the semi-axis oil blanket is installed on the step hole of semi-axis central siphon tip, the mounting means that the semi-axis oil blanket is used commonly is to use simple and easy frock to beat the oil blanket into the step hole of semi-axis central siphon through impact external force such as beating, some or even directly beat the oil blanket itself and assemble, assembly process is extensive, the oil blanket does not have the location benchmark during timing, not only the assembly difficulty, and easily hinder the semi-axis oil blanket in the assembling process and make the oil blanket lose sealed effect, can injure the semi-axis central siphon even. The utility model discloses a utensil is assisted in installation of semi-axis oil blanket, should assist the utensil and adopt the mounting means of promotion formula, has effectively improved the installation quality of semi-axis oil blanket to utility model patent that the publication number is CN 207358981U. But still have the following disadvantages: (1) because the fit between the guide sleeve and the pressure head and the fit between the half shaft oil seal and the step hole of the half shaft tube are interference fit, the fit is tight, manual pushing by adopting a flat rod mode is very laborious, an installer cannot push the half shaft oil seal to be in place without a force-borrowing point, and still needs to use impact external forces such as hammering and the like; (2) during installation, the guide sleeve is directly sleeved on the excircle of the half shaft pipe, and no positioning reference exists, so that when the half shaft oil seal is installed in place easily, an operator pushes the half shaft oil seal inwards forcibly, and the half shaft oil seal is easily damaged. (3) The pressure head and the handle are of an integral structure, and when the pressure head is damaged or the handle is broken, the pressure head and the handle need to be integrally replaced, so that the maintenance cost is high. Similarly, the same disadvantages exist in the 'half shaft oil seal installation tool' with the authorization publication number CN 205415489U.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the half shaft oil seal assembling tool is provided to overcome the defects that in the prior art, the operation is labor-consuming, the half shaft oil seal is easy to damage, and the maintenance cost is high.

The technical scheme for solving the technical problems is as follows: a half shaft oil seal assembly tool is used for installing a half shaft oil seal into a step hole at the end part of a half shaft tube and comprises a positioning guide cylinder, wherein one end of an inner hole of the positioning guide cylinder is provided with a unthreaded hole, the other end of the inner hole of the positioning guide cylinder is provided with an inner threaded hole, and a limiting step is arranged between the unthreaded hole and the inner threaded hole; the outer circle of the end part of the axle tube of the half axle is also provided with an external thread, and the internal thread hole of the positioning guide cylinder is connected with the outer circle of the end part of the axle tube of the half axle through a thread; the half shaft oil seal assembly tool further comprises a sliding block and a cam rotating mechanism; the slide block is assembled in the unthreaded hole of the positioning guide cylinder and can do reciprocating piston motion along the wall of the unthreaded hole of the positioning guide cylinder, and the half-shaft oil seal is installed at the end part of one end of the slide block; the fixed end of the cam rotating mechanism is fixedly connected with the positioning guide cylinder, and the rotating end of the cam rotating mechanism is pressed against the end face of the other end of the sliding block.

The further technical scheme of the invention is as follows: the cam rotating mechanism comprises a cam, a cam pin and a cam handle, wherein a pin hole is processed in the center of a cam base circle, the cam pin penetrates through the pin hole in the cam to install the cam on the guide positioning cylinder, the cam is pressed against the end face of the sliding block, one end of the cam handle is fixedly connected with the cam, and the other end of the cam handle extends out of the guide positioning cylinder so as to be operated.

The further technical scheme of the invention is as follows: the cam is an involute cam.

The invention has the further technical scheme that: the sliding block is provided with a first step excircle, a second step excircle and a third step excircle, the diameters of which are gradually reduced; the outer circle surface of the first step is in reciprocating piston motion fit with the wall of the unthreaded hole of the positioning guide cylinder, the diameter of the outer circle of the second step of the sliding block is smaller than the inner diameter of the limiting step of the positioning guide cylinder and the inner diameter of the step hole at the end part of the axle tube of the half axle, the semi-axle oil seal is arranged on the outer circle of the third step of the sliding block, and the diameter of the outer circle of the third step is smaller than the inner diameter of the middle hole of the axle tube of the.

Due to the adoption of the structure, compared with the prior art, the half shaft oil seal assembly tool has the following beneficial effects:

1. labor-saving and convenient operation

The positioning guide device comprises a positioning guide cylinder, a sliding block and a cam rotating mechanism, wherein the fixed end of the cam rotating mechanism is fixedly connected with the positioning guide cylinder, and the rotating end of the cam rotating mechanism is pressed against the end surface of the sliding block. When the semi-axle oil seal device is used, the semi-axle oil seal sleeve is firstly arranged on the sliding block, then the guiding and positioning cylinder and the semi-axle shaft tube are connected, the cam rotating mechanism is rotated, and the sliding block is driven to move towards the direction of the semi-axle shaft tube in the positioning and guiding cylinder together with the semi-axle oil seal sleeve on the sliding block. The cam rotating mechanism is adopted to drive the sliding block to move, the cam can rotate around the cam pin through the operation of the cam handle, and the lever mechanism is formed by taking the cam pin as a fulcrum, so that the sliding block is pushed by the lever principle, the mounting process is easy and labor-saving, the longer the length of the cam handle is, the more obvious the lever effect is, and the more labor-saving the mounting is.

Furthermore, the cam in the cam rotating mechanism adopts the involute cam, and the involute cam pushes the sliding block to move forward for a longer stroke under the condition of the same rotating angle due to the longer radian of the involute surface, so that the cam rotating mechanism is more labor-saving and more convenient.

2. Accurate positioning and avoiding damaging oil seal by extrusion

The invention comprises a positioning guide cylinder, a slide block and a cam rotating mechanism, wherein a step hole for mounting a half shaft oil seal is arranged at the end part of a half shaft tube, one end of an inner hole of the positioning guide cylinder is a unthreaded hole, the other end of the inner hole of the positioning guide cylinder is an internal threaded hole, and a limiting step is arranged between the unthreaded hole and the internal threaded hole; the excircle of the end part of the axle tube of the half axle is also provided with an external thread, and the internal thread hole of the positioning guide cylinder is connected with the excircle of the end part of the axle tube of the half axle through a thread. Therefore, when the semi-axle oil seal is assembled, the external thread of the semi-axle shaft tube is used as a positioning reference, and the limiting step in the positioning guide cylinder is used for limiting, so that the semi-axle oil seal can be accurately positioned when assembled, and the condition that the semi-axle oil seal is damaged due to the fact that an operator pushes the semi-axle oil seal inwards forcibly when the semi-axle oil seal is installed in place is avoided.

3. Can avoid damage to the semi-axis oil seal and the semi-axis shaft tube

The invention adopts the external thread of the half shaft tube as the positioning reference, can ensure accurate positioning when the half shaft oil seal is assembled, and simultaneously utilizes the involute cam rotating mechanism with simple and reliable structure to stably drive the half shaft oil seal to be assembled in place, thereby avoiding the damage of hammering and other impact type assembling to the half shaft oil seal and the half shaft tube.

4. Low maintenance cost

Because the sliding block and the cam rotating mechanism are of a split structure, in the using process, even if the sliding block or the cam rotating mechanism is damaged, only the damaged part is required to be replaced, the integral replacement is not required, and the maintenance cost is low.

5. Reliable structure

The positioning guide cylinder comprises a positioning guide cylinder, a sliding block and a cam rotating mechanism, wherein one end of an inner hole of the positioning guide cylinder is provided with a unthreaded hole, the other end of the inner hole of the positioning guide cylinder is provided with an inner threaded hole, and a limiting step is arranged between the unthreaded hole and the inner threaded hole. When the half shaft oil seal is installed, and the positioning guide cylinder is taken down from the outer circle of the half shaft tube, the slide block can be driven to simultaneously withdraw from the step hole of the half shaft tube through the limiting step, and the structure is reliable.

6. Wide application range

The cam in the cam rotating mechanism adopts an involute cam, and the shape of the involute is fixed and depends on the size of a base circle. The size of the base circle of the cam is determined by calculating the displacement of the sliding block and the rotation angle of the cam in the oil seal installation process, so that when the cam is used for installing various types of oil seals with different sizes, only the cam with the proper base circle needs to be replaced, and the cam has a wide application range.

The technical features of the half-axle oil seal assembling tool of the present invention will be further described with reference to the accompanying drawings and embodiments.

Drawings

FIG. 1: the embodiment is a front sectional view of the half-axle oil seal assembly tool of the invention,

FIG. 2: the left side view of FIG. 1;

FIG. 3: embodiment one is a schematic structural view of the slider,

FIG. 4: the state diagram of the half shaft oil seal assembling tool of the invention when the half shaft oil seal is installed,

FIG. 5: the state diagram of the half shaft oil seal assembling tool after the half shaft oil seal is installed,

in the above drawings, the reference numerals for the various parts are as follows:

1-a positioning guide cylinder, 101-a unthreaded hole, 102-a limiting step, 103-an internal threaded hole,

2-a slide block, 201-a first step excircle, 202-a second step excircle, 203-a third step excircle,

3-cam rotating mechanism, 301-cam, 302-cam pin, 303-cam handle,

4-half shaft oil seal and 5-half shaft tube.

Detailed Description