Engine crankshaft oil seal installation tool

Abstract

The invention discloses an engine crankshaft oil seal mounting tool, which relates to the technical field of oil seal mounting, and comprises a fixed disc, a moving unit penetrating through the fixed disc, a positioning unit arranged at the end part of the moving unit, and a pressing unit arranged on one side of the fixed disc, and the moving unit pushes the end part of the pressing unit to be in uniform contact with the oil seal. The oil seal press-fitting device has the beneficial effects that rotary motion of the screw is converted into axial linear motion of the nut on the surface of the fixing disc, driving force is transmitted to the pressing disc through the push rod, and therefore the oil seal is press-fitted in place in a uniform stress mode; therefore, the oil seal is stressed more uniformly in the installation process and is not easy to damage, and the installation steps are simpler and more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of oil seal installation, in particular to an engine crankshaft oil seal installation tool. Background Art

[0002] The crankshaft oil seal is an important sealing unit in the engine. Its main function is to prevent the oil from leaking from the crankcase, and also to prevent dust and moisture from entering the engine. The oil seal forms an oil film between the oil seal and the shaft through the contact between its lip and the rotating shaft to achieve sealing. The sealing ability of the oil seal depends on the thickness of the oil film on the sealing surface. It is necessary to apply an appropriate amount of lubricating oil during installation and ensure that the oil seal is perpendicular to the axis. When the oil seal is aged or damaged, it may cause oil leakage, affecting the performance and life of the engine; therefore, the oil seal needs to be replaced after working for a period of time.

[0003] In the prior art, the installation of crankshaft oil seals usually relies on traditional tools, such as glands and hand hammers, and is performed by manual knocking. Although this method is simple in structure, it has some obvious defects. First, due to the uncertainty of manual operation, the oil seal is prone to uneven depth on the left and right sides during installation, which may lead to a decrease in the sealing performance of the oil seal. Secondly, the strength of manual knocking is difficult to control, and the oil seal is easily damaged during installation, affecting its service life. In addition, this installation method requires a high level of technical skills from the operator, requiring not only precise alignment, but also certain skills. Summary of the invention

[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide an engine crankshaft oil seal installation tool, which is designed to solve the problems of uneven depth on the left and right sides of the oil seal and easy damage of the oil seal that may occur in the existing manual operation process.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an engine crankshaft oil seal installation tool, comprising a fixed plate, a moving unit arranged through the fixed plate, a positioning unit arranged at the end of the moving unit, and a pressing unit arranged at one side of the fixed plate;

[0007] The moving unit pushes the end of the pressing unit to contact the oil seal evenly.

[0008] As a preferred solution of the engine crankshaft oil seal installation tool of the present invention, wherein: the moving unit comprises a nut and a screw arranged inside the nut;

[0009] The nut is connected to the fixed disk; the screw rod penetrates the fixed disk and extends to the outside thereof;

[0010] The nut is threadedly connected to the screw rod.

[0011] As a preferred solution of the engine crankshaft oil seal installation tool of the present invention, the positioning unit includes a fixed plate arranged at the end of the screw, a movable sleeve arranged on the surface of the fixed plate, and a bolt penetrating the movable sleeve and extending to the outside thereof;

[0012] One end of the screw rod is connected to the fixing plate.

[0013] As a preferred solution of the engine crankshaft oil seal installation tool of the present invention, wherein: a crankshaft is arranged on one side of the positioning unit; a screw hole adapted to the bolt is opened on the surface of the crankshaft;

[0014] The bolt is threadedly connected to the screw hole;

[0015] The fixing plate is pressed against the crankshaft end surface by the bolts.

[0016] As a preferred solution of the engine crankshaft oil seal installation tool of the present invention, wherein: the bolt passes through the movable sleeve and extends to the outside of the fixed plate;

[0017] The movable sleeve is movably connected to the fixed plate.

[0018] As a preferred solution of the engine crankshaft oil seal installation tool of the present invention, wherein: the number of the movable sleeves is multiple groups;

[0019] The movable sleeves are grouped into two, and the positions of the movable sleeves in one group correspond to the positions of the screw holes.

[0020] As a preferred solution of the engine crankshaft oil seal installation tool of the present invention, wherein: the pressing unit includes a push rod and a pressure plate arranged at the end of the push rod;

[0021] The push rod is connected and fixed to the fixed plate; the pressure plate is spaced apart from the fixed plate by an end distance.

[0022] As a preferred solution of the engine crankshaft oil seal installation tool of the present invention, wherein: the pressure plate is a circular ring structure; the pressure plate structure is adapted to the oil seal;

[0023] The push rods are in multiple groups, and the push rods are distributed in a circular array along the surface of the pressure plate.

[0024] The beneficial effects of the present invention are as follows: the present invention converts the rotational motion of the screw into the axial linear motion of the nut on the surface of the fixed plate, and transmits the driving force to the pressure plate through the push rod, so that the oil seal is pressed into place with uniform force; the oil seal is subjected to more uniform force during the installation process, is not easily damaged, and makes the installation steps simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the positioning unit and crankshaft installation structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure of the pressure plate extrusion oil seal of the present invention.

[0028] Figure 3 It is a schematic diagram of the structure of the installation tool of the present invention.

[0029] Figure 4 It is a schematic diagram of the exploded structure of the installation tool of the present invention.

[0030] Figure 5 This is a practical diagram of the installation tool of the present invention. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Example 1

[0035] Reference Figure 1 to Figure 3, which is the first embodiment of the present invention, provides an engine crankshaft oil seal installation tool, which includes a fixed disk 101, a moving unit 200 arranged through the fixed disk 101, a positioning unit 300 arranged at the end of the moving unit 200, and a clamping unit 400 arranged on one side of the fixed disk 101; the moving unit pushes the end of the clamping unit 400 to evenly contact the oil seal.

[0036] It should be noted that the fixed disk 101 is a disc notch structure, thereby ensuring that the material loss and cost of the installation tool can be reduced during the production process; at the same time, the fixed disk 101 can be set to provide a fixed position for the mobile unit 200; the positioning unit 300 set at the end of the mobile unit 200 can connect and fix the position between the fixed disk 101 and the crankshaft, thereby better ensuring that the mobile unit 200 can drive the clamping unit 400 to move; by driving the end of the clamping unit 400, it can evenly contact the end of the oil seal; the mobile unit 200 can drive the clamping unit 400 to move, and during the movement, the clamping unit 400 can evenly push the oil seal to move; thereby ensuring that the oil seal can more conveniently enter the interior of the crankshaft; ensuring that the crankshaft oil seal is more labor-saving during installation; at the same time, the oil seal evenly enters the interior of the crankshaft, thereby ensuring that the oil seal is more uniform during installation.

[0037] In summary, the present invention converts the rotational motion of the screw into the axial linear motion of the nut on the surface of the fixed plate, and transmits the driving force to the pressure plate through the push rod, so that the oil seal is pressed into place with uniform force; the oil seal is subjected to more uniform force during the installation process, is not easily damaged, and the installation steps are simpler and more convenient.

[0038] Example 2 Reference Figure 1 to Figure 5 , which is the second embodiment of the present invention, and is different from the first embodiment in that: it also includes: the moving unit 200 includes a nut 201, and a screw rod 202 arranged on the inner side of the nut 201; the nut 201 is connected to the fixed disk 101; the screw rod 202 penetrates the fixed disk 101 and extends to the outside thereof; the nut 201 and the screw rod 202 are threadedly connected.

[0040] It should be noted that the nut 201 is welded and fixed to the fixed disk 101; the screw 202 is threadedly connected to the nut 201; the screw 202 penetrates the fixed disk 101 and extends to its outside; and one end of the screw 202 is used to connect to the ratchet wrench, so as to better ensure the driving by the staff.

[0041] Furthermore, the positioning unit 300 includes a fixed plate 301 arranged at the end of the screw rod 202, a movable sleeve 302 arranged on the surface of the fixed plate 301, and a bolt 303 penetrating the movable sleeve 302 and extending to the outside thereof; one end of the screw rod 202 is connected to the fixed plate 301.

[0042] It should be noted that the structure of the fixed plate 301 can be a longer plate-like structure; the movable sleeve 302 corresponds to the position of the fixed plate 301, and the other end of the screw 202 is movably connected to the fixed plate 301; thereby ensuring that the position between the screw 202 and the fixed plate 301 is fixed.

[0043] Furthermore, a crankshaft N is disposed on one side of the positioning unit 300 ; a screw hole adapted to the bolt 303 is opened on the surface of the crankshaft N; the bolt 303 is threadedly connected to the screw hole; and the fixing plate 301 is pressed against the end face of the crankshaft N by the bolt 303 .

[0044] It should be noted that a screw hole is provided on the surface of the crankshaft N, and a bolt 303 is provided to penetrate the movable sleeve 302 and extend to its outside; the bolt 303 is threadedly connected to the screw hole, so that the bolt 303 presses the fixing plate 301 against one side of the crankshaft N, thereby ensuring that the position of the fixing plate 301 is fixed to the crankshaft N; and the nut 201 is threadedly connected to the fixing plate 301, thereby fixing the position of the nut 201 and the crankshaft N.

[0045] Furthermore, the bolt 303 penetrates the movable sleeve 302 and extends to the outside of the fixed plate 301 ; the movable sleeve 302 and the fixed plate 301 are movably connected.

[0046] It should be noted that the end of the bolt 303 can be in contact with the top of the movable sleeve 302, thereby ensuring that during the connection process between the bolt 303 and the screw hole of the crankshaft N, the bolt 303 and the screw hole of the crankshaft N are tightly connected; thereby ensuring that the fixing plate 301 is pressed against the crankshaft N, thereby fixing the position of the device.

[0047] Furthermore, the pressing unit 400 includes a push rod 401 and a pressure plate 402 disposed at the end of the push rod 401 ; the push rod 401 is connected and fixed to the fixed plate 101 ; and the pressure plate 402 is spaced a distance from the fixed plate 101 .

[0048] It should be noted that one end of the push rod 401 is fixed to the pressure plate 402 through a threaded connection, and the other end of the push rod 401 passes through the fixed plate 101 and extends to its outside, and the end of the push rod 401 is connected and fixed to the fixed plate 101 through a nut; the setting of the push rod 401 allows a moving distance to exist between the pressure plate 402 and the fixed plate 101, ensuring that the rotating screw 202 can drive the clamping unit 400 to move.

[0049] When in use, the staff fixes the device on one side of the crankshaft N according to the operating steps of Example 1, and then uses a ratchet wrench to connect it to the end of the screw 202, and then rotates the ratchet wrench to drive the screw 202 to rotate; at this time, the position of the screw 202 is in a fixed position, and as the screw 202 rotates, the fixed plate 101 can be driven to move along the axial direction of the screw 202 in the direction of the crankshaft N, so that the end of the pressure plate 402 can contact the oil seal; and the feed amount of the pressure plate 402 is uniform, thereby ensuring that the oil seal can be evenly approached to the crankshaft N, so that the staff can save more effort in the process of installing the oil seal; at the same time, the tightness of the oil seal installation is ensured during the operation, so that the oil seal can be efficiently and quickly installed on the inside of the crankshaft N.

[0050] In summary, the present invention converts the rotational motion of the screw into the axial linear motion of the nut on the surface of the fixed plate, and transmits the driving force to the pressure plate through the push rod, so that the oil seal is pressed into place with uniform force; the oil seal is subjected to more uniform force during the installation process, is not easily damaged, and the installation steps are simpler and more convenient.

[0051] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An engine crankshaft oil seal installation tool, characterized in that: It comprises a fixed disk (101), a moving unit (200) arranged through the fixed disk (101), a positioning unit (300) arranged at the end of the moving unit (200), and a pressing unit (400) arranged at one side of the fixed disk (101); The moving unit pushes the end of the pressing unit (400) to uniformly contact the oil seal.

2. The engine crankshaft oil seal installation tool according to claim 1, characterized in that: The moving unit (200) comprises a nut (201) and a screw rod (202) arranged inside the nut (201); The nut (201) is connected to the fixing plate (101); the screw rod (202) penetrates the fixing plate (101) and extends to the outside thereof; The nut (201) is threadedly connected to the screw rod (202).

3. The engine crankshaft oil seal installation tool according to claim 2, characterized in that: The positioning unit (300) comprises a fixed plate (301) arranged at the end of the screw rod (202), a movable sleeve (302) arranged on the surface of the fixed plate (301), and a bolt (303) penetrating the movable sleeve (302) and extending to the outside thereof; One end of the screw rod (202) is connected to the fixing plate (301).

4. The engine crankshaft oil seal installation tool according to claim 3, characterized in that: A crankshaft (N) is disposed on one side of the positioning unit (300); a screw hole adapted for the bolt (303) is provided on the surface of the crankshaft (N); The bolt (303) is threadedly connected to the screw hole; The fixing plate (301) is pressed against the end surface of the crankshaft (N) by means of the bolts (303).

5. The engine crankshaft oil seal installation tool according to claim 3 or 4, characterized in that: The bolt (303) passes through the movable sleeve (302) and extends to the outside of the fixed plate (301); The movable sleeve (302) is movably connected to the fixed plate (301).

6. The engine crankshaft oil seal installation tool according to claim 5, characterized in that: The movable sleeves (302) are provided in multiple groups; The movable sleeves (302) are grouped in two, and the positions of the movable sleeves (302) in one group correspond to the positions of the screw holes.

7. The engine crankshaft oil seal installation tool according to any one of claims 1 to 4 and 6, characterized in that: The pressing unit (400) comprises a push rod (401) and a pressure plate (402) arranged at the end of the push rod (401); The push rod (401) is connected and fixed to the fixed plate (101); the pressure plate (402) is spaced apart from the fixed plate (101) by an end distance.

8. The engine crankshaft oil seal installation tool according to claim 7, characterized in that: The pressure plate (402) is a circular ring structure; the pressure plate (402) structure is compatible with the oil seal; The push rods (401) are provided in a plurality of groups, and the plurality of groups of push rods (401) are distributed in a circular array along the surface of the pressure plate (402).

Images