Assembly tool for crankshaft and bearing helical teeth

Abstract

The utility model discloses an assembly tool for a crankshaft and bearing helical teeth, which comprises a tool frame body, a containing cavity for the crankshaft to extend into is formed in the tool frame body, and a placing notch communicated with the containing cavity is formed on one side of the top of the tool frame body. A positioning protrusion used for abutting against a cam on the crankshaft is formed on the top of the tool frame body along the edge of the placing-in notch. Compared with the prior art, the tool frame has the advantages that the containing cavity, the placing notch and the positioning protrusion are formed on the tool frame body, a crankshaft can be quickly positioned and fixed, and therefore the crankshaft and bearing helical teeth can be stably pressed; the assembly tool is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling structures, in particular to an assembly tooling for crankshafts and bearing helical gears. Background Art

[0002] The crankshaft is the most important part of the engine. It bears the force from the connecting rod and converts it into torque, which is output through the crankshaft and drives other accessories on the engine. The crankshaft is subjected to the combined effects of the centrifugal force of the rotating mass, the periodically changing gas inertia force and the reciprocating inertia force, which makes the crankshaft subject to bending and torsional loads.

[0003] During the assembly process of the crankshaft, a bearing bevel gear needs to be installed on one end thereof. The existing method is to use large equipment to fix the crankshaft, and then the bearing bevel gear is installed and then pressed by a press. The use of large equipment to fix the crankshaft has high equipment cost. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an assembly tool for a crankshaft and a helical bearing gear, so as to solve the problem of high equipment cost in the prior art of using large equipment to fix the crankshaft.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solution: an assembly tool for crankshaft and bearing helical gear, including a tool frame body, a receiving cavity for the crankshaft part to extend into the tool frame body, a receiving notch connected to the receiving cavity is formed on one side of the top of the tool frame body, and a positioning protrusion is formed on the top of the tool frame body along the edge of the receiving notch for abutting against the cam on the crankshaft.

[0006] Working principle:

[0007] Put the middle part of the crankshaft into the notch so that one end of the crankshaft extends into the accommodating cavity, and the other end of the crankshaft is placed above the jig body, and the cam on the crankshaft abuts against the positioning protrusion to stably position and fix the crankshaft; then the bearing helical gear can be mounted on the end of the crankshaft placed above the jig body, and then the crankshaft and the bearing helical gear are pressed together by a press; after the pressing is completed, the crankshaft is removed from the notch.

[0008] Compared with the prior art, the utility model has the following beneficial effects:

[0009] The assembly tool can quickly position and fix the crankshaft by forming a receiving cavity, a notch and a positioning protrusion on the tool frame body, so that the crankshaft and the helical teeth of the bearing can be stably pressed; the assembly tool has a simple structure and a low manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0011] Figure 2 for Figure 1 A cross-sectional view of

[0012] Figure 3 for Figure 1 A schematic diagram of the structure of the middle top cover;

[0013] Figure 4 It is a cross-sectional view of another embodiment of the utility model.

[0014] The reference numerals in the drawings of the specification include: a tooling frame body 1, a bottom plate 11, a top cover 12, a connecting plate 13, an insertion notch 2, a positioning protrusion 3, an adjustable support member 4, a support plate 41, a slider 42, an adjusting screw rod 43, a movable rod 44, and an elastic telescopic rod 45. DETAILED DESCRIPTION

[0015] The utility model is further described in detail below through specific implementation methods:

[0016] like Figure 1 , Figure 2 as well as Figure 3 As shown, an embodiment of the utility model proposes an assembly tool for crankshaft and bearing helical gear, including a tool frame body 1, wherein the tool frame body 1 is formed with a receiving cavity for the crankshaft part to extend therein, a receiving notch 2 connected to the receiving cavity is formed on one side of the top of the tool frame body 1, and a positioning protrusion 3 for abutting against a cam on the crankshaft is formed along the edge of the receiving notch 2 at the top of the tool frame body 1.

[0017] The specific use is as follows: the middle part of the crankshaft is inserted into the insertion gap 2 to make one end of the crankshaft extend into the accommodating cavity, and the other end of the crankshaft is placed above the jig frame body 1, and the cam on the crankshaft is against the positioning protrusion 3 to stably position and fix the crankshaft; then the bearing helical gear can be mounted on the end of the crankshaft placed above the jig frame body 1, and then the crankshaft and the bearing helical gear are press-fitted by a press; after the press-fitting is completed, the crankshaft is removed from the insertion gap 2.

[0018] The assembly tool can quickly position and fix the crankshaft by forming a receiving cavity, a notch 2 and a positioning protrusion 3 on the tool frame body 1, so that the crankshaft and the helical teeth of the bearing can be stably pressed; the assembly tool has a simple structure and a low manufacturing cost.

[0019] like Figure 1 and Figure 2As shown, according to another embodiment of the utility model, the assembly tool for crankshaft and bearing helical gear, wherein the tool frame body 1 includes a bottom plate 11 and a top cover 12, the top cover 12 is located above the bottom plate 11 and arranged horizontally, the top cover 12 and the bottom plate 11 are connected by two connecting plates 13 arranged at intervals, and the notch 2 is opened on one side of the top cover 12.

[0020] In this embodiment,

[0021] The bottom plate 11, the top cover 12 and the two connecting plates 13 form a square frame structure, the space formed by the inner enclosure is the accommodating cavity, the middle part of the crankshaft is placed through the placement notch 2, and the accommodating cavity provides a space for one end of the crankshaft; the design of the placement notch 2 facilitates the quick assembly of the crankshaft on the assembly tool so that the cam on the crankshaft abuts against the positioning protrusion 3, so as to stably position and fix the crankshaft. Among them, the support plate 41 is fixedly connected to the bottom plate 11 and the top cover 12 by screws.

[0022] Due to the shape of the crankshaft, the inner wall section of the insertion notch 2 away from its insertion entrance is arc-shaped, so the middle part of the crankshaft is inserted from the insertion notch 2, and the outer wall of the crankshaft can fit with the inner wall of the insertion notch 2, which is beneficial to improve the positioning stability of the crankshaft in this assembly tool.

[0023] Specifically, the curvature of the inner wall section of the insertion notch 2 away from its insertion entrance is л. Since a section of the crankshaft placed in the insertion notch 2 is cylindrical, there is a larger fitting surface between the outer wall of the crankshaft and the inner wall of the insertion notch 2, thereby improving the positioning stability of the crankshaft in the present assembly tooling.

[0024] In order to improve the stability of the crankshaft and bearing helical teeth during assembly, Figure 4 As shown, according to another embodiment of the utility model, an assembly tool for a crankshaft and a bearing helical gear, wherein the tool frame body 1 is provided with an adjustable support member 4 for abutting against one end of the crankshaft placed in the accommodating cavity, and the end of the crankshaft placed in the accommodating cavity is supported by the adjustable support member 4, thereby further improving the stability of the crankshaft when pressure is applied to the bearing helical gear to tighten the connection between the crankshaft and the bearing helical gear, which is beneficial to improving the service life of the assembly tool.

[0025] Based on the above scheme:

[0026] The adjustable support member 4 includes a support plate 41 and an adjustment portion, wherein the support plate 41 is slidably connected to the tooling frame body 1 along the vertical direction in the accommodating cavity; the adjustment portion is arranged between the support plate 41 and the tooling frame body 1 and is used to change the position of the support plate 41 in the accommodating cavity.

[0027] Here: the support plate 41 is specifically connected between the two connecting plates 13 by sliding in the vertical direction, and the adjustment part is connected between the base plate 11 and the support plate 41 to adjust the position of the support plate 41, so that when pressure is applied to the helical teeth of the bearing during the assembly process, the support plate 41 will be against the bottom end of the crankshaft, so as to more stably assemble the crankshaft and the helical teeth of the bearing.

[0028] Among them, the adjustment part includes a slider 42, an adjusting screw rod 43 and a movable rod 44. There are two sliders 42 and both are slidably set in a slide groove opened in the horizontal direction on the tooling frame body 1. The adjusting screw rod 43 is arranged along the length direction of the slide groove and is threadedly connected to the two sliders 42. One end of the adjusting screw rod 43 is passed through the outside of the tooling frame body 1; there are two movable rods 44 and the middle parts of the two movable rods 44 are rotatably connected. One end of the two movable rods 44 is rotatably connected to the two sliders 42 one by one, and one end of the two movable rods 44 is slidably connected to the support plate 41.

[0029] Specifically, the slide groove is opened on the top surface of the base plate 11, and one end of the adjusting screw rod 43 is passed through the outside of the base plate 11 as a handle to rotate the adjusting screw rod 43, so that the two sliders 42 move toward or away from each other in the slide groove, and then drive the support plate 41 to slide in the vertical direction through the two movable rods 44.

[0030] One end of the adjusting screw rod 43 is passed through the end outside the bottom plate 11 and can be connected to a motor to drive the rotation.

[0031] In order to further improve the stability of the support plate 41 when it abuts against the bottom end of the crankshaft, a plurality of elastic telescopic rods 45 arranged along the sliding direction of the support plate 41 are connected between the support plate 41 and the jig frame body 1; specifically, a plurality of elastic telescopic rods 45 are connected between the support plate 41 and the bottom plate 11. During the sliding process of the support plate 41, the elastic telescopic rods 45 are adjusted to be telescopic; after the support plate 41 is adjusted, the plurality of elastic telescopic rods 45 still play a supporting role for the support plate 41.

[0032] When using this solution:

[0033] Place the middle part of the crankshaft through the notch 2 so that one end of the crankshaft extends into the receiving cavity, and the other end of the crankshaft is placed above the jig frame body 1, and the cam on the crankshaft abuts against the positioning protrusion 3;

[0034] Rotate the adjusting screw 43 to make the support plate 41 contact with the bottom end of the crankshaft;

[0035] The bearing helical gear sleeve is then placed on one end of the crankshaft, and the press is operated to apply pressure to the bearing helical gear for press-fitting.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An assembly tool for crankshaft and bearing helical gear, characterized in that: The tool frame body comprises a housing for the crankshaft part to extend into a receiving cavity, a notch communicating with the receiving cavity is formed on one side of the top of the tool frame body, and a positioning protrusion for abutting against a cam on the crankshaft is formed along the edge of the notch at the top of the tool frame body.

2. The assembly tool for crankshaft and bearing helical gear according to claim 1, characterized in that: The tooling frame body comprises: Base plate; The top cover is located above the bottom plate and arranged horizontally. The top cover and the bottom plate are connected by two connecting plates arranged at intervals, and the notch is opened on one side of the top cover.

3. An assembly tool for crankshaft and bearing helical gear according to claim 1 or 2, characterized in that: The inner wall section of the insertion notch away from the insertion opening is arc-shaped.

4. The assembly tool for crankshaft and bearing helical gear according to claim 3, characterized in that: The curvature of the inner wall section of the insertion notch away from its insertion entrance is л.

5. The assembly tool for crankshaft and bearing helical gear according to claim 1, characterized in that: An adjustable support member is arranged in the tooling frame body and is used to abut against one end of the crankshaft placed in the accommodating cavity.

6. The assembly tool for crankshaft and bearing helical gear according to claim 5, characterized in that: The adjustable support member comprises: A support plate, wherein the support plate is slidably connected to the tooling frame body in a vertical direction in the accommodating cavity; The adjusting portion is arranged between the supporting plate and the tooling frame body and is used to change the position of the supporting plate in the accommodating cavity.

7. The assembly tool for crankshaft and bearing helical gear according to claim 6, characterized in that: The adjustment unit comprises: There are two slide blocks, both of which are slidably arranged in slide grooves opened in the horizontal direction on the tooling frame body; An adjusting screw rod, which is arranged along the length direction of the slide slot and is threadedly connected to the two sliders, and one end of the adjusting screw rod is passed through the outside of the tooling frame body; There are two movable rods, and the middle parts of the two movable rods are rotatably connected. One end of the two movable rods is rotatably connected with two sliding blocks in a one-to-one correspondence, and one end of the two movable rods is slidably connected with the support plate.

8. The assembly tool for crankshaft and bearing helical gear according to claim 7, characterized in that: A plurality of elastic telescopic rods arranged along the sliding direction of the support plate are also connected between the support plate and the tooling frame body.

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