Grinding dislocation-preventing clamp used after crankshaft blank forging

Abstract

The utility model discloses a crankshaft blank after-forging grinding anti-dislocation clamp which comprises a clamping mechanism, a plurality of anti-dislocation mechanisms are arranged on the top of the clamping mechanism, each anti-dislocation mechanism comprises a stand column, and a second sliding groove is formed in the outer surface of each stand column. After a crankshaft blank is clamped and fixed through the clamping mechanism, the second motor is started to drive the second two-way screw rod to rotate, and the second two-way screw rod rotates to drive the upper sliding block and the lower sliding block which penetrate through the surface threads to drive the upper clamping block and the lower clamping block to get close to each other, so that an eccentric connecting rod journal in a crankshaft is clamped and fixed; when the device is used, the connecting rod main journal of the crankshaft blank and the eccentric connecting rod journal are both independently fixed, so that the connecting rod journal and balance weights at the two ends can keep good stability when being subjected to grinding and other machining treatment; and the problem of crankshaft quality reduction and even scrapping caused by grinding position errors is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshaft processing, in particular to an anti-displacement fixture for grinding after forging of a crankshaft blank. Background Technique

[0002] The crankshaft is the most important component in the engine. It bears the force transmitted by the connecting rod, converts it into torque and outputs it through the crankshaft to drive other accessories on the engine to work. The crankshaft is jointly affected by the centrifugal force of the rotating mass, the periodically changing gas inertia force and the reciprocating inertia force, so that the crankshaft bears the action of bending and torsional loads.

[0003] In order to improve the product quality, a series of operations such as grinding are required for the forged crankshaft blank. Before grinding, the two ends of the crankshaft are usually clamped and fixed. However, different from traditional straight-axis workpieces, the connecting rod main journal and the connecting rod journal on the side of the crankshaft itself are eccentrically arranged. Therefore, when the grinding of the balance weights at both ends of the connecting rod journal generates extrusion force, the fixed crankshaft is still prone to rotate around the connecting rod main journal, resulting in incorrect grinding positions, reducing the quality of the crankshaft or even scrapping it. In view of the above problems, the applicant proposes an anti-displacement fixture for grinding after forging of a crankshaft blank to solve the above problems. Content of the Utility Model

[0004] In order to solve the problem that during the forging process of the crankshaft blank, the connecting rod journal eccentric to the connecting rod main journal is prone to cause the crankshaft blank to rotate during grinding, resulting in incorrect grinding positions, reducing the quality of the crankshaft or even scrapping it, the purpose of the utility model is to provide an anti-displacement fixture for grinding after forging of a crankshaft blank.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: an anti-displacement fixture for grinding after forging of a crankshaft blank, including a clamping mechanism, and a plurality of anti-displacement mechanisms are arranged on the top of the clamping mechanism. The anti-displacement mechanism includes a column, a second sliding groove is opened on the outer surface of the column, an upper slider and a lower slider are symmetrically slidably connected between the inner walls of the second sliding groove, an upper clamping block is fixedly connected to the bottom of the upper slider, and a lower clamping block is fixedly connected to the top of the lower slider.

[0006] Preferably, a second bidirectional lead screw is rotatably connected between the inner top and inner bottom of the second sliding groove, a second motor is installed on the top of the column, the output end of the second motor slidably penetrates the top of the column and extends into the interior of the second sliding groove, the output end of the second motor is fixedly connected to the top of the second bidirectional lead screw, and the outer surface of the second bidirectional lead screw is bolted through the outer surfaces of the upper slider and the lower slider.

[0007] Preferably, the clamping mechanism includes a bottom plate, a first sliding groove is formed at the center of the top of the bottom plate, and first sliders are symmetrically and slidably embedded between the inner surfaces of the first sliding groove.

[0008] Preferably, mounting plates are symmetrically installed at the tops of the two first sliders, and socket sleeves are fixedly connected to the outer surfaces of the opposite sides of the two mounting plates near the top. A crankshaft blank is inserted between the inner surfaces of the two socket sleeves.

[0009] Preferably, a first bidirectional lead screw is rotatably connected between the inner surfaces of the two sides of the first sliding groove, and the outer surface of the first bidirectional lead screw threadedly penetrates through the outer surfaces of the two first sliders respectively.

[0010] Preferably, a first motor is installed on the outer surface of one side of the bottom plate, the output end of the first motor slidably penetrates through the outer surface of the bottom plate and extends into the first sliding groove, and the output end of the first motor is connected to the end of the first bidirectional lead screw.

[0011] Preferably, the outer surfaces of the opposite sides of the upper clamping block and the lower clamping block are both semicircularly arranged and are provided with flanges extending outward on both sides, and the outer edge of the inner cavity of the socket sleeve is inclined outward.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] After the crankshaft blank is clamped and fixed by the clamping mechanism, starting the second motor can drive the second bidirectional lead screw to rotate. When the second bidirectional lead screw rotates, the upper slider and the lower slider threaded through the surface will drive the upper clamping block and the lower clamping block to approach each other, so as to clamp and fix the eccentric connecting rod journal in the crankshaft, so that the connecting rod journal cannot move. When the device is in use, the connecting rod main journal and the eccentric connecting rod journal of the crankshaft blank are both fixed separately, so that the connecting rod journal and the balance weights at both ends can maintain good stability during grinding and other processing operations, and avoid problems such as incorrect grinding position causing a decline in the quality of the crankshaft or even scrapping;

[0014] Multiple anti-displacement mechanisms are provided in the device. When grinding the surface of the crankshaft blank near the anti-displacement mechanism after forging, the corresponding second motor can be started to drive the second bidirectional lead screw to reverse, so that the upper clamping block and the lower clamping block are temporarily away from the surface of the crankshaft, which will not affect the grinding operation of the surface of the crankshaft blank, and the flexibility of use is relatively high. Description of the Drawings

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic structural diagram of the present invention.

[0017] Figure 2 It is a top view of the present invention.

[0018] Figure 3 It is a schematic structural diagram of the clamping mechanism in the present invention.

[0019] Figure 4 It is a schematic structural diagram of the anti-displacement mechanism in the present invention.

[0020] In the figure: 1. Clamping mechanism; 101. Base plate; 102. First sliding groove; 103. First slider; 104. First bidirectional lead screw; 105. First motor; 106. Mounting plate; 107. Insert sleeve; 2. Anti-displacement mechanism; 201. Column; 202. Second sliding groove; 203. Second bidirectional lead screw; 204. Upper slider; 205. Upper clamping block; 206. Lower slider; 207. Lower clamping block; 208. Second motor. Specific embodiments

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0022] Embodiment: As Figures 1-4 shown, the present invention provides a grinding anti-displacement fixture for a crankshaft blank after forging, including a clamping mechanism 1. A plurality of anti-displacement mechanisms 2 are arranged on the top of the clamping mechanism 1. The anti-displacement mechanism 2 includes a column 201. A second sliding groove 202 is opened on the outer surface of the column 201. An upper slider 204 and a lower slider 206 are symmetrically slidably connected between the inner walls of the second sliding groove 202. A upper clamping block 205 is fixedly connected to the bottom of the upper slider 204. A lower clamping block 207 is fixedly connected to the top of the lower slider 206.

[0023] Through the above technical solution, the upper slider 204 and the lower slider 206 are mainly used to drive the upper clamping block 205 and the lower clamping block 207 to move up and down. Moreover, the upper slider 204 and the lower slider 206 are slidably embedded inside the second sliding groove 202, and when moving up and down with their surfaces in contact, they have high stability and will not shake.

[0024] Further, a second bidirectional lead screw 203 is rotatably connected between the inner top and the inner bottom of the second sliding groove 202. A second motor 208 is installed at the top of the column 201. The output end of the second motor 208 slidably penetrates the top of the column 201 and extends into the second sliding groove 202. The output end of the second motor 208 is fixedly connected to the top end of the second bidirectional lead screw 203. The outer surface of the second bidirectional lead screw 203 is bolted through the outer surfaces of the upper slider 204 and the lower slider 206.

[0025] Through the above technical solution, during use, by starting the second motor 208, the second bidirectional lead screw 203 can be driven to rotate. When the second bidirectional lead screw 203 rotates, the upper slider 204 and the lower slider 206 with their surfaces threaded through will drive the upper clamping block 205 and the lower clamping block 207 to approach each other, thereby clamping and fixing the eccentric connecting rod journal in the crankshaft, so that the connecting rod journal cannot move.

[0026] Further, the clamping mechanism 1 includes a bottom plate 101. A first sliding groove 102 is opened at the center of the top of the bottom plate 101. First sliders 103 are symmetrically and slidably embedded between the inner walls of the first sliding groove 102. Mounting plates 106 are symmetrically installed at the tops of the two first sliders 103. Socket sleeves 107 are fixedly connected to the outer surfaces of the relative sides of the two mounting plates 106 near the top. A crankshaft blank is inserted between the inner walls of the two socket sleeves 107.

[0027] Through the above technical solution, the first slider 103 is slidably embedded inside the first sliding groove 102, so it can only slide left and right and has high stability. When the first slider 103 moves, it is mainly used to drive the mounting plate 106 and the socket sleeve 107 at the top to move.

[0028] Further, a first bidirectional lead screw 104 is rotatably connected between the inner walls on both sides of the first sliding groove 102. The outer surface of the first bidirectional lead screw 104 is threaded through the outer surfaces of the two first sliders 103 respectively. A first motor 105 is installed on the outer surface of one side of the bottom plate 101. The output end of the first motor 105 slidably penetrates the outer surface of the bottom plate 101 and extends into the first sliding groove 102. The output end of the first motor 105 is connected to the end of the first bidirectional lead screw 104.

[0029] Through the above technical solution, during use, starting the first motor 105 drives the first bidirectional lead screw 104 to rotate. Under the action of the first bidirectional lead screw 104, the two first sliders 103 inside the first sliding groove 102 can be driven to approach each other. During this process, the socket sleeves 107 on the surfaces of the two mounting plates 106 will approach synchronously, thereby playing a role in clamping both ends of the connecting rod journal of the crankshaft blank. During the process of fixing the crankshaft blank, the crankshaft is rotated so that the connecting rod journal and the eccentric connecting rod journal are on the same horizontal plane.

[0030] Furthermore, the outer surfaces of the opposite sides of the upper clamping block 205 and the lower clamping block 207 are both semicircularly arranged and are provided with flanges extending outward on both sides. The outer edge of the inner cavity of the socket sleeve 107 is inclined outward.

[0031] Through the above technical solution, the semicircular grooves on the surfaces of one set of the upper clamping block 205 and the lower clamping block 207 are the same size as the connecting rod journal of the crankshaft, and the semicircular grooves on the surfaces of the other two sets of the upper clamping block 205 and the lower clamping block 207 are the same size as the connecting rod main journal of the crankshaft. Therefore, after the upper clamping block 205 and the lower clamping block 207 are fitted together, the positions of the connecting rod journal and the connecting rod main journal on the crankshaft can be corrected. The flanges extending outward on both sides of the upper clamping block 205 and the lower clamping block 207 can effectively avoid the problem that the connecting rod journal rotates out of the clamping range of the upper clamping block 205 and the lower clamping block 207 after the rotation angle deviates. Designing the outer edge of the inner cavity of the socket sleeve 107 to be inclined outward makes it more convenient for the connecting rod main journal in the crankshaft blank to be inserted.

[0032] Working principle: When in use, starting the first motor 105 drives the first double-headed lead screw 104 to rotate. Under the action of the first double-headed lead screw 104, the two first sliders 103 inside the first sliding groove 102 can be driven to approach each other. During this process, the socket sleeves 107 on the surfaces of the two mounting plates 106 will approach synchronously, thereby playing a role in clamping both ends of the connecting rod journal of the crankshaft blank. When fixing the crankshaft blank, the crankshaft is rotated so that the connecting rod journal and the eccentric connecting rod journal are on the same horizontal plane. Subsequently, starting the second motor 208 can drive the second double-headed lead screw 203 to rotate. When the second double-headed lead screw 203 rotates, it will drive the upper slider 204 and the lower slider 206 with threaded surfaces passing through to drive the upper clamping block 205 and the lower clamping block 207 to approach each other, thereby clamping and fixing the eccentric connecting rod journal in the crankshaft, so that the connecting rod journal cannot move. When this device is in use, both the connecting rod journal of the crankshaft blank and the eccentric connecting rod journal are fixed separately, so that the connecting rod journal and the balance weights at both ends can maintain good stability during machining processes such as grinding, avoiding problems such as incorrect grinding positions causing a decline in the quality of the crankshaft or even scrapping. At the same time, multiple anti-displacement mechanisms 2 are provided in this device. When grinding the surface of the crankshaft blank near the anti-displacement mechanism 2 after forging, the corresponding second motor 208 can be started to drive the second double-headed lead screw 203 to reverse, so that the upper clamping block 205 and the lower clamping block 207 are temporarily away from the crankshaft surface, without affecting the grinding operation of the crankshaft blank, and the flexibility of use is relatively high.

[0033] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these changes and modifications.

Claims

1. A crankshaft blank post-forging grinding anti-dislocation fixture, comprising a clamping mechanism (1), characterized in that: A plurality of anti-dislocation mechanisms (2) are provided on the top of the clamping mechanism (1); The anti-misalignment mechanism (2) comprises a column (201), the outer surface of the column (201) is provided with a second sliding groove (202), an upper sliding block (204) and a lower sliding block (206) are symmetrically slidably connected between the inner surface walls of the second sliding groove (202), an upper clamping block (205) is fixedly connected to the bottom of the upper sliding block (204), and a lower clamping block (207) is fixedly connected to the top of the lower sliding block (206).

2. The anti-dislocation fixture for grinding the crankshaft blank after forging as claimed in claim 1, characterized in that: A second bidirectional screw rod (203) is rotatably connected between the inner top and the inner bottom of the second sliding groove (202); a second motor (208) is installed on the top of the column (201); an output end of the second motor (208) slides through the top of the column (201) and extends into the interior of the second sliding groove (202); the output end of the second motor (208) is fixedly connected to the top of the second bidirectional screw rod (203); and a bolt on the outer surface of the second bidirectional screw rod (203) penetrates the outer surfaces of the upper slider (204) and the lower slider (206).

3. The anti-dislocation fixture for grinding the crankshaft blank after forging as claimed in claim 2, characterized in that: The clamping mechanism (1) comprises a bottom plate (101), a first sliding groove (102) is provided at the top centre of the bottom plate (101), and a first sliding block (103) is symmetrically slidably embedded between the inner surface walls of the first sliding groove (102).

4. The anti-dislocation fixture for grinding the crankshaft blank after forging as claimed in claim 3, characterized in that: Mounting plates (106) are symmetrically mounted on the tops of the two first sliding blocks (103); sleeves (107) are fixedly connected to the outer surfaces of opposite sides of the two mounting plates (106) near the tops; a crankshaft blank is inserted between the inner walls of the two sleeves (107).

5. The anti-dislocation fixture for grinding the crankshaft blank after forging as claimed in claim 4, characterized in that: A first bidirectional screw rod (104) is rotatably connected between the inner surface walls on both sides of the first sliding groove (102), and the outer surface of the first bidirectional screw rod (104) is threadedly penetrated through the outer surfaces of the two first sliding blocks (103).

6. The anti-dislocation fixture for grinding the crankshaft blank after forging as claimed in claim 5, characterized in that: A first motor (105) is mounted on an outer surface of one side of the base plate (101); an output end of the first motor (105) slides through the outer surface of the base plate (101) and extends into the interior of the first sliding groove (102); the output end of the first motor (105) is connected to an end of a first bidirectional screw rod (104).

7. The anti-dislocation fixture for grinding the crankshaft blank after forging as claimed in claim 6, characterized in that: The outer surfaces of the upper clamping block (205) and the lower clamping block (207) on opposite sides are both semicircular and have flanges extending outwards on both sides, and the outer edge of the inner cavity of the insert sleeve (107) is inclined outwards.

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