Clamp for installing crankshaft timing helical gear

Abstract

The utility model discloses a clamp for installing a crankshaft timing helical gear, and belongs to the field of automobile part manufacturing. The base is connected to the upper portion of the base through a third bolt and a second pin, the positioning block with a V-shaped groove is connected with the base in a sliding mode, the positioning block is installed at the lower end of the fixing plate through a second bolt and a first pin, the two sides of the fixing plate are connected to the base through first bolts, compression springs are connected between the first bolts and the fixing plate, and the support is installed on the base. A V-shaped groove is formed in the bottom end of the positioning block, the angle of the V-shaped groove is consistent with the helical angle of the timing helical gear, and the included angle between the center line of the V-shaped groove and the center line of a P6 connecting rod neck of the crankshaft is alpha. According to the utility model, the installation of the crankshaft timing helical gear can be accurately and conveniently ensured, under the existing condition, the same machine tool only needs to replace the installation clamp of the timing helical gear, the function of installing various timing helical gears with different specifications on the current machine tool can be met, the installation angle is accurate, the operation is simple, the stability is good, the manufacturing cost is reduced, and the production efficiency is improved. And the product processing quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts manufacturing, in particular to a clamp used for installing a crankshaft timing helical gear. Background Art

[0002] During the development of new crankshaft products, the crankshaft processing technology is: rough and fine turning of the crankshaft big head and small head, milling of the crankshaft main journal and connecting rod journal, drilling and chamfering of the oil holes of the crankshaft main journal and connecting rod journal, quenching and tempering of the crankshaft, fine grinding of the crankshaft rear end gear journal, installation of the crankshaft timing bevel gear, etc.

[0003] Among them, the purpose of designing and installing the crankshaft timing helical gear is to ensure the valve timing phase when the engine is running, so that the opening and closing of the intake and exhaust valves are consistent with the piston movement, so as to ensure the accuracy of the crankshaft timing position.

[0004] In the past, the timing helical gears installed on the crankshaft were all spur gears. When installing the timing helical gears, you only need to align the marked teeth of the timing helical gears with the positioning device on the gear installation fixture, start the machine tool to complete the installation. However, with the rapid development of the automobile industry, the design and update of crankshaft products, as core components of automobiles, are also very fast. Compared with timing spur gears, the use of timing helical gears has smoother transmission, greater torque, less noise, longer service life, and more safety and reliability. The original fixture for installing timing spur gears can no longer meet the installation requirements of timing helical gears. Therefore, it is becoming increasingly important to study a fixture for installing crankshaft timing helical gears. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the invention object of the utility model is to provide a fixture for installing a crankshaft timing helical gear, so as to accurately and conveniently install the crankshaft timing helical gear.

[0006] To achieve the above-mentioned purpose of the invention, the base of the utility model is connected to the top of the base by bolt three and pin two, the positioning block with a V-groove is slidably connected to the base, the positioning block is installed on the lower end of the fixed plate by bolt two and pin one, the two sides of the fixed plate are connected to the base by bolt one, a compression spring is connected between bolt one and the fixed plate, and the bracket is installed on the base.

[0007] Furthermore, a V-groove is provided at the bottom end of the positioning block, and the angle between the center line of the V-groove and the axis of the base is ß, which is consistent with the helix angle ß of the timing helical gear. The angle between the center line of the V-groove and the center line of the P6 connecting rod neck of the crankshaft is α, which is consistent with the installation angle α of the mark tooth of the timing helical gear 4.

[0008] Furthermore, a movable limiting plate is provided between the bolt 1 on one side of the fixing plate and the positioning block, the upper plane of the limiting plate is fitted with the lower plane of the fixing plate, and the lower plane of the limiting plate is fitted with the upper plane of the base.

[0009] Furthermore, there are three or more brackets, which are axially tightened and fixed in the slots of the base by means of top screws. The brackets extend out of the plane of the base. The inner side of the brackets is an arc structure, and the radius of the circle formed by the arcs on the inner sides of the multiple brackets is consistent with the outer radius of the timing helical gear.

[0010] Furthermore, a rectangular guide slot is provided on the base, and the positioning block is mounted in the rectangular guide slot of the base. The center line of the rectangular guide slot in the length direction is parallel to the center line of the V-groove, and the angle between the center line of the rectangular guide slot in the length direction and the axis of the base is ß, which is consistent with the helix angle ß of the timing helical gear.

[0011] Furthermore, the fixing plate is a parallelogram structure, and the angle between the hypotenuse and the axis of the base is ß, which is consistent with the helix angle ß of the timing helical gear.

[0012] Furthermore, the symmetry center line of the base and the symmetry center line of the crankshaft are on the same vertical plane.

[0013] When installing the timing helical gear, first install and fix the base on the timing helical gear installation machine; then install the timing helical gear on the fixture, align the mark tooth of the timing helical gear with the V-groove of the positioning block, so that the mark tooth and the ß helix angle of the V-groove match, and after the end face of the timing helical gear with the mark tooth mark G is fitted along the bracket and the base, with the assistance of the limit plate, adjust the compression spring to normally compress the telescopic force of the positioning block, tighten the bolt with the fixing nut, move the limit plate, and the positioning block presses down the timing helical gear to fix it firmly on the base, then put the timing helical gear installation journal of the crankshaft on the workbench of the timing helical gear installation machine for positioning, operate the timing helical gear installation machine, and then the timing helical gear can be installed.

[0014] Compared with the prior art, the utility model can accurately and conveniently ensure the installation of the crankshaft timing helical gear. Under the existing conditions, the same machine tool only needs to replace the installation fixture of the timing helical gear to meet the function of installing a variety of different specifications of timing helical gears on the current machine tool. The installation angle is accurate, the installation method is convenient, the operation is simple, the installation accuracy is high, the stability is good, the manufacturing cost is reduced, and the processing quality of the product is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the installation of the timing helical gear.

[0016] Figure 2 for Figure 1AA section view.

[0017] Figure 3 It is the front view of the structure of the utility model.

[0018] Figure 4 for Figure 3 Left view of .

[0019] Figure 5 for Figure 3 Top view of the .

[0020] Figure 6 for Figure 3 Front view of the base structure.

[0021] Figure 7 for Figure 6 CC cross-sectional view.

[0022] In the figure: 1. crankshaft; 2. P6 connecting rod neck; 3. timing helical gear mounting journal; 4. timing helical gear; 5. reference surface; 6. mark G; 7. marking tooth; 8. base; 9. pedestal; 10. positioning block; 11. fixing plate; 12. bolt one; 13. bolt two; 14. pin one; 15. compression spring; 16. fixing nut; 17. limit plate; 18. bolt three; 19. pin two; 20. bracket; 21. top screw; 22. V-groove. DETAILED DESCRIPTION

[0023] like Figure 1 , Figure 2 As shown, according to the installation requirements of the timing helical gear 4 of the crankshaft 1, the tooth corresponding to the mark G6 on the end face of the timing helical gear 4 is the marking tooth 7, and the reference plane 5 of the marking tooth 7 is the cross section of L from the installation end face of the timing helical gear 4. The angle between the center of the marking tooth 7 on the reference plane 5 and the center line of the crankshaft P6 connecting rod journal 2 is the installation angle α of the marking tooth 7 of the timing helical gear 4, and the timing helical gear 4 is installed on the timing helical gear installation journal 3 of the crankshaft 1. After the timing helical gear 4 is installed on the crankshaft 1, how to ensure that the installation angle α meets the technical requirements is the invention purpose of the utility model.

[0024] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, the base 9 of the fixture for installing the crankshaft timing helical gear of the utility model is connected to the top of the base 8 by bolt three 18 and pin two 19, the positioning block 10 with a V-shaped groove 22 is slidably connected to the base 9, the positioning block 10 is installed on the lower end of the fixed plate 11 by bolt two 13 and pin one 14, the two sides of the fixed plate 11 are connected to the base 9 by bolt one 12, a compression spring 15 is connected between the bolt one 12 and the fixed plate 11, the bracket 20 is installed on the base 8, and the symmetry center line of the base 8 and the symmetry center line of the crankshaft 1 are on the same vertical plane.

[0025] Preferably, a V-groove 22 is provided at the bottom end of the positioning block 10, and the angle between the center line of the V-groove 22 and the axis of the base 8 is ß, which is consistent with the helix angle ß of the timing helical gear 4, and the angle between the center line of the V-groove 22 and the center line of the P6 connecting rod neck 2 of the crankshaft 1 is α, which is consistent with the installation angle α of the mark tooth 7 of the timing helical gear 4.

[0026] Preferably, a movable limiting plate 17 is provided between the bolt 12 on one side of the fixing plate 11 and the positioning block 10, the upper plane of the limiting plate 17 is in contact with the lower plane of the fixing plate 11, and the lower plane of the limiting plate 17 is in contact with the upper plane of the base 9. After adjusting the compression spring 15 to normally compress the telescopic force of the positioning block 10, the bolt 12 is locked by the fixing nut 16. After the timing helical gear 4 is initially fixed on the bracket 20 on the base 8, when the timing helical gear 4 of the crankshaft 1 is installed on the timing helical gear mounting journal 3, the movable limiting plate 17 can make the positioning block 10 firmly and reliably compress the timing helical gear 4 under the action of the compression spring 15, so as to ensure the installation accuracy between the timing helical gear 4 and the timing helical gear mounting journal 3.

[0027] Preferably, there are three brackets 20, and the brackets 20 are axially tightened and fixed in the slots of the base 8 by means of a top screw 21. The brackets 20 extend out of the plane of the base 8. The inner side of the brackets 20 is an arc structure, and the radius of the circle formed by the arcs on the inner sides of the multiple brackets 20 is consistent with the outer radius of the timing helical gear 4.

[0028] Preferably, a rectangular guide slot is provided on the base 9, and the positioning block 10 is mounted in the rectangular guide slot of the base 9. The center line of the rectangular guide slot in the length direction is parallel to the center line of the V-shaped slot 22, and the angle between the center line of the rectangular guide slot in the length direction and the axis of the base 8 is ß, which is consistent with the helix angle ß of the timing helical gear 4.

[0029] Preferably, the fixing plate 11 is a parallelogram structure, and the angle between its hypotenuse and the axis of the base 8 is ß, which is consistent with the helix angle ß of the timing helical gear 4.

[0030] During operation, first install and fix the base 8 on the timing helical gear installation machine; then install the timing helical gear 4 on the fixture, align the marking tooth 7 of the timing helical gear 4 with the V-groove 22 of the positioning block 10, and after the end face of the timing helical gear 4 with the marking tooth mark G6 is fitted with the base 8 along the bracket 20, with the assistance of the limit plate 17, adjust the compression spring 15 to normally compress the telescopic force of the positioning block 10, lock the bolt 12 through the fixing nut 16, move the limit plate 17, and after the positioning block 10 presses down the timing helical gear 4 to fix it firmly on the base 8, put the timing helical gear installation journal 3 of the crankshaft 1 into the workbench of the timing helical gear installation machine for positioning, the operator operates the timing helical gear installation machine, installs the timing helical gear 4 on the timing helical gear installation journal 3, and uses the fixture to ensure that the installation angle of the timing helical gear 4 meets the requirements.

[0031] After the installation of the timing helical gear 4 is completed, pull the fixing plate 11 upwards to separate the V-groove 22 of the positioning block 10 from the installed gear marking tooth 7, and then move the limiting plate 17 to between the bolt 12 on one side of the fixing plate 11 and the positioning block 10 to keep the positioning block 10 fixed, take out the crankshaft 1 with the timing helical gear 4 installed, and the entire installation step is completed.

Claims

1. A fixture for installing a crankshaft timing helical gear, characterized in that: The base (9) is connected to the top of the base (8) by means of bolt three (18) and pin two (19); a positioning block (10) having a V-shaped groove (22) is slidably connected to the base (9); the positioning block (10) is mounted on the lower end of the fixing plate (11) by means of bolt two (13) and pin one (14); both sides of the fixing plate (11) are connected to the base (9) by means of bolt one (12); a compression spring (15) is connected between the bolt one (12) and the fixing plate (11); and the bracket (20) is mounted on the base (8).

2. The fixture for installing the crankshaft timing helical gear according to claim 1, characterized in that: A V-shaped groove (22) is provided at the bottom end of the positioning block (10), and the angle between the center line of the V-shaped groove (22) and the axis of the base (8) is ß, which is consistent with the helix angle ß of the timing helical gear (4). The angle between the center line of the V-shaped groove (22) and the center line of the P6 connecting rod neck (2) of the crankshaft (1) is α, which is consistent with the installation angle α of the mark tooth (7) of the timing helical gear 4.

3. The fixture for installing the crankshaft timing helical gear according to claim 1, characterized in that: A movable limiting plate (17) is provided between the bolt 1 (12) on one side of the fixing plate (11) and the positioning block (10); the upper plane of the limiting plate (17) is in contact with the lower plane of the fixing plate (11); and the lower plane of the limiting plate (17) is in contact with the upper plane of the base (9).

4. The fixture for installing the crankshaft timing helical gear according to claim 1, characterized in that: There are three or more brackets (20), the brackets (20) are axially tightened and fixed in the slots of the base (8) by means of a top screw (21), the brackets (20) extend out of the plane of the base (8), the inner side of the brackets (20) is an arc structure, and the radius of the circle formed by the arcs on the inner sides of the plurality of brackets (20) is consistent with the outer radius of the timing helical gear (4).

5. The fixture for installing the crankshaft timing helical gear according to claim 1, characterized in that: The base (9) is provided with a rectangular guide slot, and the positioning block (10) is sleeved in the rectangular guide slot of the base (9). The center line of the rectangular guide slot in the length direction is parallel to the center line of the V-shaped groove (22). The angle between the center line of the rectangular guide slot in the length direction and the axis of the base (8) is ß, which is consistent with the helix angle ß of the timing helical gear (4).

6. The fixture for installing the crankshaft timing helical gear according to claim 1, characterized in that: The fixing plate (11) is a parallelogram structure, and the angle between its hypotenuse and the axis of the base (8) is ß, which is consistent with the helical angle ß of the timing helical gear (4).

7. The fixture for installing the crankshaft timing helical gear according to claim 1, characterized in that: The symmetry center line of the base (8) and the symmetry center line of the crankshaft (1) are on the same vertical plane.

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