CN202412188U - Press-fitting tool for rear oil seal of engine crankshaft - Google Patents

Abstract

The utility model discloses a press-fitting tool for a rear oil seal, which is capable of controlling the oil seal to be always vertical to the central line of the crankshaft and ensuring that the oil seal is not easily damaged in the oil seal press-fitting process. By using the press-fitting tool for the rear oil seal of the engine crankshaft, the defects that the common oil seal press-fitting tool cannot be used for accurately controlling the oil seal to be vertical to the central line of the crankshaft and the oil seal is easily damaged in the press-fitting process are overcome. The press-fitting tool for the rear oil seal of the engine crankshaft comprises a clamping fixture body, wherein the clamping fixture body is provided with a long-neck flange; the long-neck flange is provided with a central hole; the neck of the long-neck flange is a hollow cylinder with an internal thread; the long-neck flange is provided with a screw rod matched with the internal thread; the top of the screw rod is provided with a joint; a thrust bearing is arranged between the screw rod and the joint; a locating sleeve movably connected with the clamping fixture body through a plurality of guide rods are sleeved on the outside surface of the clamping fixture body; and the locating sleeve is internally provided with an oil seal slot. The press-fitting tool is suitable for all occasions for which the former common oil seal press-fitting tool is suitable, and has the advantages that the oil seal is always vertical to the central line of the crankshaft, is not easily damaged in the press-fitting process, and the like.

Description

Tool for press-fitting rear oil seal of engine crankshaft

technical field

The utility model relates to an operation tool, in particular to a tool for pressing and installing the rear oil seal of a crankshaft. the

Background technique

Oil seals are mechanical components used to seal oil or other liquid substances. Oil seals are required for all parts that have liquid lubricating oil in the running body box and are connected to the outside. Engine crankshaft rear oil seal is very common in production, and its press-fitting tools are also widely used. The crankshaft rear oil seal must be perpendicular to the center line of the crankshaft during the press-fitting process, otherwise the oil seal will be trimmed in the circumferential direction, which will damage the oil seal and cause engine oil leakage. It is difficult to control the rear oil seal of the crankshaft to be perpendicular to the center line of the crankshaft during the pressing process of the current engine crankshaft rear oil seal press tool, which makes the oil seal easily damaged. the

Chinese Patent Publication No. CN201677166U, published on December 22, 2010. The name of the utility model is an oil seal installation device. The application discloses an oil seal installation device, which includes a cylindrical body, and The diameter is gradually transitional, the front is small and the back is large, and a cylindrical hole is arranged in the cylindrical body, and the diameter of the cylindrical hole is equal to or larger than the outer diameter of the shaft to be installed with the oil seal. The weak point of this utility model is still that in the process of press-fitting the oil seal, the oil seal can not be accurately controlled to be perpendicular to the center line of the crankshaft, and the oil seal is easily damaged. the

Utility model content

The utility model overcomes the disadvantages that the general oil seal pressing tool cannot accurately control the oil seal to be perpendicular to the crankshaft center line during the oil seal pressing process, and the oil seal is easily damaged, and provides a tool that can control the oil seal to be always perpendicular to the crankshaft during the oil seal pressing process. Centerline, oil seal pressing tool that is not easy to damage the oil seal. the

The utility model is achieved through the following technical solutions:

A press-fitting tool for an engine crankshaft rear oil seal, comprising a tire body, the tire body is provided with a long-necked flange, the long-necked flange is provided with a central hole, and the neck of the long-necked flange is internally threaded Hollow column, the long-necked flange is provided with a screw rod matching its internal thread, the top of the screw rod is provided with a joint, and a thrust bearing is provided between the screw rod and the joint, and the outer surface of the tire body is provided with several guide rods The positioning sleeve is movably connected with the tire body, and an oil seal groove is arranged in the positioning sleeve. Put the oil seal into the oil seal groove according to the correct direction, then align the center hole with the protruding step of the crankshaft of the engine so that the utility model is fitted on the crankshaft, and then the utility model is attached to the crankshaft. The power drives the screw to rotate forward, thereby driving the tire body to move forward. The oil seal in the oil seal groove is installed on the crankshaft, and due to the action of the guide rod, the oil seal is pushed in the press-fitting tool as a whole during the whole process, and is always perpendicular to the The center line of the crankshaft, and the oil seal is not easily damaged due to the uniform force.

Preferably, the tire body is provided with at least one stud, and the stud is screwed to the tire body through a hole in the long-necked flange base. After the utility model is set on the protruding step of the engine crankshaft, turn the stud to be screwed into the flywheel mounting hole at the rear end of the crankshaft, so that the oil seal pressing tool behind the whole engine crankshaft can not fall out of the crankshaft. the

Preferably, a gasket is provided between the top of the tire body and the screw rod. The gasket separates the tire from the screw to ensure that the screw can rotate freely as a whole. the

As a preference, the outer casing of the guide rod is provided with a compression spring. After the installation of the oil seal is completed, the utility model is returned, and the stage clip makes the positioning sleeve reset automatically. the

Preferably, the joint and the screw are provided with a communicating pin hole, the communicating pin hole is provided with a cylindrical pin corresponding to the communicating pin hole, and the joint and the screw are detachably connected through the cylindrical pin. The straight pin is used to connect the joint and the screw. When the input power mode or method is changed, the straight pin can be pulled out to replace the corresponding joint, and then the straight pin can be inserted back, which is easy to operate. the

Preferably, an O-ring is provided on the joint. The O-shaped retaining ring can block the cylindrical pin so that it will not fall out easily, which increases the stability and safety of the engine crankshaft rear oil seal pressing tool in use. the

Preferably, the joint body is a cylinder with coaxial square holes. This structure can use the corresponding wind trigger for power input, making the power input more rapid and stable. the

Preferably, the tire body is provided with set screws and matching nuts. The set screw is inserted into the tire body, which limits the range of the long-necked flange's forward and backward movement, and ensures that the relative position between the long-necked flange and the tire body is stable during the installation of the oil seal. the

Preferably, the tire body (1) is provided with two symmetrical screws along the axis of the screw (2). After the utility model is set on the crankshaft, another power input part that can be attached to the crankshaft is provided, that is, the screw can be rotated by tools such as a manual wrench or a wind trigger, thereby pushing the utility model to be firmly attached to the crankshaft. crankshaft. the

Therefore, the beneficial effects of the utility model are: (1) the oil seal is always perpendicular to the center line of the crankshaft during the press-fitting process; (2) various power input modes; (3) the oil seal is not easily damaged during the press-fitting process. the

Description of drawings

Fig. 1 is the structural representation of the utility model. the

Detailed ways

Below by embodiment, in conjunction with accompanying drawing, technical scheme of the present utility model is further described:

A kind of engine crankshaft rear oil seal pressing tool as shown in Figure 1, comprises tire body 1, and described tire body 1 is provided with long-necked flange 3, and described long-necked flange 3 is provided with central hole, and is long The neck of the neck flange 3 is a hollow column with an internal thread, and the long neck flange 3 is provided with a screw 2 matching its internal thread, the top of the screw 2 is provided with a joint 5, and a joint 5 is provided between the screw 2 and the joint 5. Thrust bearing 12, the outer side of the tire body 1 is provided with a positioning sleeve 7 that is movably connected with the tire body 1 through several guide rods, and an oil seal groove 10 is provided in the positioning sleeve 7 . The tire body 1 is provided with at least one stud 4, and the stud 4 passes through the hole on the base of the long-necked flange 3 and is screwed to the tire body 1, and the top of the tire body 1 and the screw rod 2 are arranged There is a gasket 6, the guide rod is covered with a compression spring 14, the joint 5 and the screw rod 2 are provided with a connected pin hole, and the connected pin hole is provided with a cylinder corresponding to the connected pin hole. Pin 9, joint 5 and screw rod 2 are detachably connected through cylindrical pin 9. An O-ring 13 is provided on the joint 5. The main body of the joint 5 is a cylinder with a coaxial square hole. The tire body is provided with a set screw 11 and a matching nut 8. The tire body 1 is provided with two along the Screw 2 Axisymmetric screws.

When using the utility model, install the oil seal into the oil seal groove 10 in the positioning sleeve 7 according to the correct direction, that is, the lower surface of the oil seal faces outwards and the upper surface inwards, and then the positioning sleeve 7 is set on the protruding step of the crankshaft of the engine, and then the The utility model is attached to the crankshaft. Since the top of the screw rod 2 is provided with a joint 5, the input power from the joint 5 can drive the screw rod 2 to rotate forward, thereby driving the tire body 1 to move forward. The oil seal in the oil seal groove 10 is installed on the crankshaft, and Due to the function of the guide rod, during the whole process, the oil seal is pushed in the pressing tool as a whole, always perpendicular to the center line of the crankshaft, and is not easily damaged. After the utility model is sleeved on the protruding step of the engine crankshaft, the screw stud 4 is screwed into the flywheel mounting hole at the rear end of the crankshaft, so that the utility model can not fall out of the crankshaft. A spacer 6 is arranged between the top of the tire body 1 and the screw rod 2 to isolate the tire body 1 from the screw rod 2, further ensuring that the screw rod 2 can rotate freely as a whole. Because the overcoat of guide rod is provided with stage clip 14, after oil seal is installed, return the utility model, stage clip 14 can make positioning sleeve reset automatically. The joint 5 and the screw 2 are provided with a connected pin hole, and the connected pin hole is provided with a cylindrical pin 9 corresponding to the connected pin hole, and the joint 5 and the screw 2 are detachably connected through the cylindrical pin 9 . When the input power mode or method is changed, such as using a wrench of a different size, the straight pin 9 can be pulled out to replace the corresponding joint 5, and then the straight pin 9 can be inserted back, and the O-ring 13 on the joint 5 can be It blocks the cylindrical pin 9 so that it will not easily fall out of the pin hole, which increases the stability and overall safety of the joint during use. The main body of the joint 5 is a cylinder with a coaxial square hole, which can be adapted to the corresponding type of wind trigger . The tire body 1 is provided with a set screw 11 and a matching nut 8. The set screw 11 is inserted into the tire body 1, which limits the range of the long-necked flange 3 to move back and forth, and ensures that the long-necked flange 3 is installed in the oil seal installation process. The relative position of the blue 3 and the tire body 1 is stable. The tire body 1 is provided with two symmetrical screws along the axis of the screw rod 2. After the utility model is set on the crankshaft, another power input part that can be attached to the crankshaft is provided, that is, the wind trigger can be used to and other tools to turn the screw, so as to promote the utility model to be firmly attached to the crankshaft. In the process, it can still ensure that the oil seal is always perpendicular to the center line of the crankshaft, and because the oil seal is in the oil seal groove 10, and because the two screws are along the The axis is symmetrical, so the force is uniform, and the oil seal is not easy to be damaged during installation. the

Claims (9)

1. A press-fitting tool for an engine crankshaft rear oil seal, characterized in that it includes a tire body (1), the tire body (1) is provided with a long-necked flange (3), and the long-necked flange ( 3) There is a central hole, the neck of the long-necked flange (3) is a hollow column with internal threads, and the long-necked flange (3) is provided with a screw (2) matching its internal thread, and the screw (2) ) is provided with a joint (5) on the top, and a thrust bearing (12) is provided between the screw rod (2) and the joint (5). ) movably connected positioning sleeve (7), the positioning sleeve is provided with an oil seal groove (10). 2. The engine crankshaft rear oil seal press-fitting tool according to claim 1, characterized in that at least one stud (4) is provided on the tire body (1), and the stud (4) Pass through the hole on the base of the long-necked flange (3) and thread the tire body (1). 3. The engine crankshaft rear oil seal pressing tool according to claim 1, characterized in that a gasket (6) is provided between the top of the tire body (1) and the screw (2). 4. The engine crankshaft rear oil seal pressing tool according to claim 1, 2 or 3, characterized in that a pressure spring (14) is provided outside the guide rod. 5. The engine crankshaft rear oil seal pressing tool according to claim 1, characterized in that, the joint (5) and the screw (2) are provided with a pin hole connected to each other, and the connected pin hole is provided with a There is a straight pin (9) corresponding to the connected pin hole, and the joint (5) is detachably connected to the screw rod (2) through the straight pin (9). 6 . The engine crankshaft rear oil seal pressing tool according to claim 5 , wherein an O-ring ( 13 ) is provided on the joint ( 5 ). 7. The engine crankshaft rear oil seal pressing tool according to claim 1, 2, 3 or 6, characterized in that the main body of the joint (5) is a cylinder with coaxial square holes. 8 . The engine crankshaft rear oil seal pressing tool according to claim 7 , characterized in that, the tire body is provided with set screws ( 11 ) and matching nuts ( 8 ). 9. The engine crankshaft rear oil seal pressing tool according to claim 8, characterized in that, the tire body (1) is provided with two symmetrical screws along the axis of the screw (2).

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