Fixing tool for machining crank throw of diesel engine

Abstract

The utility model discloses a fixing tool for machining a crank throw of a diesel engine, which relates to the technical field of clamps and comprises a fixing frame and a clamping and fixing device. The clamping and fixing device comprises two supporting frames, two clamping discs, two fixing pressing plates, two threaded rods and two rotating discs, the two supporting frames are fixedly connected to the top of the fixing frame, the two clamping discs are rotationally connected to the interiors of the two supporting frames correspondingly, and the opposite sides of the two clamping discs are provided with containing grooves; two placing grooves are formed in the base, a crankshaft is placed in the two placing grooves, four crank throws are fixedly connected to the crankshaft, two fixing pressing plates are slidably connected to the interiors of the two placing grooves correspondingly, and the two fixing pressing plates can clamp and fix crankshafts with different diameter sizes through triangular clamping grooves in the bottoms; therefore, when the sizes of the crankshafts are different, the crankshafts can still be fixed, the application range of the fixing tool is enlarged, and then the convenience of fixing the crankshafts of different specifications is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to a fixing tool for machining a crank of a diesel engine. Background Art

[0002] Due to the special structure of the diesel engine crankshaft, eccentric clamping is required during the processing. Now, before grinding the crankshaft radius, the eccentricity of the crankshaft is adjusted by an adjustable eccentric clamp to complete the clamping.

[0003] The currently published patent: CN 219617162 U discloses a crankshaft processing and fixing mechanism, which places the crankshaft upright inside the placement tube in the movable clamping seat and the fixed clamping seat, and then starts the electric push rod to pull the movable block downward, thereby driving the lower pressure plate to push the movable clamping seat downward to clamp and fix the crankshaft, thereby avoiding the cumbersome and inconvenient operation of the current crankshaft fixing equipment, resulting in low work efficiency of the staff and affecting the use, so as to achieve the effect of rapid fixing.

[0004] Based on the above search, it is found that the above patent has the following problems when in use: when the crankshaft processing and fixing mechanism is in use, the movable clamping seat can be pushed downward by the lower pressure plate to clamp and fix the crankshaft, but the sizes of the inside of the two placing tubes are fixed. Therefore, only crankshafts of one size can be placed inside the two placing tubes. When the sizes of the crankshafts are different, they cannot be fixed. The scope of application has certain limitations, which in turn affects the convenience of fixing crankshafts of different specifications. Utility Model Content

[0005] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a fixing tool for diesel engine crankshaft processing, which can solve the problem that only one size of crankshaft can be placed inside the two placing cylinders, and when the crankshafts are of different sizes, they cannot be fixed, and the scope of application has certain limitations, which in turn affects the convenience of fixing crankshafts of different specifications.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fixing tool for diesel engine crank processing, comprising a fixing frame and a clamping and fixing device; the clamping and fixing device comprises two supporting frames, two clamping discs, two fixed pressure plates, two threaded rods and two rotating discs, the two supporting frames are fixedly connected to the top of the fixing frames, the two clamping discs are rotatably connected to the inside of the two supporting frames, the two clamping discs are respectively provided with placement grooves on the opposite sides, the crankshafts are placed inside the two placement grooves, four cranks are fixedly connected to the crankshafts, the two fixed pressure plates are respectively slidably connected to the inside of the two placement grooves, the two fixed pressure plates are respectively provided with triangular grooves at the bottom, the inner walls of the triangular grooves are in contact with the surface of the crankshaft, and the two threaded rods are respectively threadedly installed in the inside of the two clamping discs.

[0007] Preferably, the lower ends of the two threaded rods are rotatably connected to the tops of the two fixed pressure plates, and the two turntables are fixedly connected to the upper ends of the two threaded rods.

[0008] Preferably, the ends of the two clamping discs facing away from each other are fixedly connected to a rotating shaft, and the surfaces of the two rotating shafts are fixedly sleeved with a first sprocket.

[0009] Preferably, surfaces of the two first sprockets are meshedly connected with chains.

[0010] Preferably, a servo motor is fixedly mounted on the left end of the fixing frame, and a rotating rod is fixedly connected to the output end of the servo motor.

[0011] Preferably, two second sprockets are fixedly sleeved on the surface of the rotating rod, and the two second sprockets are respectively meshed and connected with the two chains.

[0012] Compared with the prior art, the beneficial effect of the utility model is that the staff can fix and clamp the two fixed pressure plates on the surface of the crankshaft in the same way, and then fix the crankshaft inside the two clamping discs. Since the two fixed pressure plates can clamp and fix crankshafts of different diameters through the triangular grooves at the bottom, the crankshafts can still be fixed when they are of different sizes, which increases the application scope of the fixed tooling and improves the convenience of fixing crankshafts of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic diagram of the overall structure of a fixed tooling for diesel engine crankshaft processing according to the utility model;

[0015] Figure 2 It is a schematic diagram of the left end structure of the fixing frame of the utility model;

[0016] Figure 3 This is a schematic diagram of the top structure of the fixing frame of the utility model;

[0017] Figure numerals: 1. fixed frame; 2. supporting frame; 3. clamping disc; 4. placement groove; 5. crankshaft; 6. crank; 7. fixed pressure plate; 8. triangular slot; 9. threaded rod; 10. turntable; 11. rotating shaft; 12. first sprocket; 13. chain; 14. servo motor; 15. rotating rod; 16. second sprocket. DETAILED DESCRIPTION

[0018] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model. In the description of the utility model, it should be understood that the directions or positional relationships indicated by the description of the orientation, such as up, down, front, back, left, right, etc., are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0019] In the description of the present utility model, greater than, less than, and exceeding are understood as not including the number itself, and above, below, and within are understood as including the number itself. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and it cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of the indicated technical features. In the description of the present utility model, unless otherwise clearly defined, the terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meaning of the above terms in the present utility model in combination with the specific content of the technical solution.

[0020] See also Figure 1-3 The utility model provides a technical solution: a fixed tool for diesel engine crank processing, comprising a fixing frame 1 and a clamping and fixing device, the clamping and fixing device comprising two supporting frames 2, two clamping discs 3, two fixed pressure plates 7, two threaded rods 9 and two rotating disks 10, the two supporting frames 2 are fixedly connected to the top of the fixing frame 1, the two clamping discs 3 are respectively rotatably connected to the inside of the two supporting frames 2, the two clamping discs 3 are provided with placement grooves 4 on the opposite sides, the crankshafts 5 are placed inside the two placement grooves 4, four cranks 6 are fixedly connected to the crankshaft 5, the two fixed pressure plates 7 are respectively slidably connected to the inside of the two placement grooves 4, the bottoms of the two fixed pressure plates 7 are provided with triangular grooves 8, the inner walls of the triangular grooves 8 are in contact with the surface of the crankshaft 5, the two threaded rods 9 are respectively threadedly installed in the inside of the two clamping discs 3, the lower ends of the two threaded rods 9 are respectively rotatably connected to the tops of the two fixed pressure plates 7, and the two rotating disks 10 are respectively fixedly connected to the upper ends of the two threaded rods 9.

[0021] After the staff puts the crankshaft 5 into the two placement grooves 4, the staff can rotate the threaded rod 9 through the turntable 10. The rotation of the threaded rod 9 can drive the fixed pressure plate 7 to slide downward through the threaded connection between the clamping disc 3. The fixed pressure plate 7 slides downward and can be fixedly clamped on the surface of the crankshaft 5 through the triangular groove 8. The staff can fix the two fixed pressure plates 7 on the surface of the crankshaft 5 in the same way, and then fix the crankshaft 5 inside the two clamping discs 3. Since the two fixed pressure plates 7 can clamp and fix the crankshafts 5 of different diameters through the triangular grooves 8 at the bottom, the crankshaft 5 can still be fixed when the sizes are different, which increases the application range of the fixing tool and thus improves the convenience of fixing crankshafts 5 of different specifications.

[0022] The opposite ends of the two clamping discs 3 are fixedly connected to a rotating shaft 11, the surfaces of the two rotating shafts 11 are fixedly sleeved with first sprockets 12, the surfaces of the two first sprockets 12 are meshedly connected with chains 13, a servo motor 14 is fixedly installed on the left end of the fixed frame 1, the output end of the servo motor 14 is fixedly connected to a rotating rod 15, the surface of the rotating rod 15 is fixedly sleeved with two second sprockets 16, and the two second sprockets 16 are meshedly connected with the two chains 13 respectively.

[0023] The staff can start the servo motor 14 to drive the rotating rod 15 to rotate. The rotation of the rotating rod 15 can simultaneously drive the two second sprockets 16 to rotate. The rotation of the two second sprockets 16 can drive the two first sprockets 12 to rotate through the two chains 13. The rotation of the two first sprockets 12 can drive the two rotating shafts 11 and the two clamping discs 3 to rotate at the same time. The rotation of the two clamping discs 3 can drive the crankshaft 5 to rotate. The rotation of the crankshaft 5 can drive the crank 6 to rotate to adjust the placement position for the convenience of the staff to process the crank 6. The servo motor 14 is a new type of motor with brake from Panasonic. It adds a brake on the basis of an ordinary servo motor, which can achieve more efficient control and safer operation. The brake can maintain the position of the motor through the braking torque when the servo motor 14 stops running, so that the crank 6 can be kept in different positions, which is convenient for the staff to process it.

[0024] Working principle: The diesel engine crankshaft processing uses a fixed tooling, and the staff can rotate the threaded rod 9 through the turntable 10. The rotation of the threaded rod 9 can drive the fixed pressure plate 7 to slide downward and be fixedly clamped on the surface of the crankshaft 5, and then the crankshaft 5 is fixedly installed inside the two clamping discs 3. Since the two fixed pressure plates 7 can clamp and fix the crankshaft 5 of different diameters through the triangular slots 8 at the bottom, the crankshaft 5 can still be fixed when the sizes of the crankshaft 5 are different. The staff can drive the rotating rod 15 to rotate by starting the servo motor 14. The rotation of the rotating rod 15 can simultaneously drive the two second sprockets 16 to rotate. The rotation of the two second sprockets 16 can drive the two first sprockets 12 to rotate through the two chains 13. The rotation of the two first sprockets 12 can drive the two rotating shafts 11 and the two clamping discs 3 to rotate at the same time. The rotation of the two clamping discs 3 can drive the crankshaft 5 to rotate. The rotation of the crankshaft 5 can drive the crank 6 to rotate. The placement position can be adjusted to facilitate the staff to process the crank 6.

[0025] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A fixed tool for diesel engine crankshaft processing, characterized in that: include: A fixing frame (1) and a clamping fixture; The clamping and fixing device comprises two support frames (2), two clamping discs (3), two fixed pressure plates (7), two threaded rods (9) and two rotating discs (10). The two support frames (2) are fixedly connected to the top of the fixed frame (1). The two clamping discs (3) are rotatably connected to the inside of the two support frames (2). The two clamping discs (3) are provided with placement grooves (4) on opposite sides. A crankshaft (5) is placed inside the two placement grooves (4). Four cranks (6) are fixedly connected to the crankshaft (5). The two fixed pressure plates (7) are slidably connected to the inside of the two placement grooves (4). The bottoms of the two fixed pressure plates (7) are provided with triangular grooves (8). The inner walls of the triangular grooves (8) are in contact with the surface of the crankshaft (5). The two threaded rods (9) are respectively threadedly installed inside the two clamping discs (3).

2. A diesel engine crankshaft machining fixture according to claim 1, characterized in that: The lower ends of the two threaded rods (9) are rotatably connected to the tops of the two fixed pressure plates (7), and the two rotating disks (10) are fixedly connected to the upper ends of the two threaded rods (9).

3. A diesel engine crankshaft machining fixture according to claim 1 or 2, characterized in that: The ends of the two clamping discs (3) facing away from each other are fixedly connected to a rotating shaft (11), and the surfaces of the two rotating shafts (11) are fixedly sleeved with a first sprocket (12).

4. A diesel engine crankshaft machining fixture according to claim 3, characterized in that: The surfaces of the two first sprockets (12) are both meshedly connected with chains (13).

5. A diesel engine crankshaft machining fixture according to claim 4, characterized in that: A servo motor (14) is fixedly mounted on the left end of the fixed frame (1), and a rotating rod (15) is fixedly connected to the output end of the servo motor (14).

6. A diesel engine crankshaft machining fixture according to claim 5, characterized in that: Two second sprocket wheels (16) are fixedly sleeved on the surface of the rotating rod (15), and the two second sprocket wheels (16) are respectively meshed and connected with the two chains (13).

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