Crankshaft clamping and fixing mechanism

Abstract

The utility model relates to a crankshaft clamping and fixing mechanism, including a mounting shell that is internally rotatably connected to a mounting ring with a vertical plane projection as an arc-shaped structure, and mounting seats are fixedly connected to the left and right sides of the upper end of the mounting ring, respectively, and a clamping mechanism is arranged between the two mounting seats, and the crankshaft is fixed by the clamping mechanism. Therefore, the device replaces the supporting device of the clamping mechanism with the mounting ring, so that the inclination angle of the clamping mechanism can be synchronously changed during the installation and rotation process. Therefore, compared with the prior art device, the application range of the present application is wider, and it can adapt to some crankshaft processing processes with additional needs. Specifically, a driving motor is fixedly connected to one side of the mounting shell, and a driving gear is sleeved on the outer side of the output shaft of the driving motor. At the same time, gear teeth are arranged on the outer side of the mounting ring, and the mounting ring is connected to the driving gear through the gear teeth meshing transmission connection, so that the driving motor is used to control the rotation angle of the mounting ring.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping mechanisms, in particular to a crankshaft clamping and fixing mechanism. 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 to work.

[0003] In the prior art, the machining process of the crankshaft generally requires a corresponding fixture to clamp and position the crankshaft. Specifically, the fixture generally consists of a base, a three-jaw chuck, and a push rod. The three-jaw chuck and the push rod are respectively located at the two axial ends of the crankshaft, and the three-jaw chuck is slidably connected with the push rod and the crankshaft.

[0004] In the prior art device, the push rod coincides with the central axis of the three-jaw chuck, and its central axis is perpendicular to the vertical plane. Therefore, the central axis of the crankshaft clamped by it must also be perpendicular to the vertical plane. The prior art device generally considers the normalized processing process, that is, it can complete most processing processes by keeping the crankshaft perpendicular to the vertical plane.

[0005] This means that in some processing processes, such as cutting of bevels and drilling of oblique holes, additional adjustment of processing tools is required. For some processing companies, the processing equipment they use is simple and the tools used in their processing equipment do not have a wide range of angle adjustment.

[0006] Therefore, we believe that there is a need for a crankshaft clamping and fixing mechanism that can actively change the horizontality of the crankshaft center axis so as to be compatible with the processing equipment. Summary of the invention

[0007] In view of the shortcomings of the prior art, the utility model proposes a crankshaft clamping and fixing mechanism, which has the advantages of being able to actively change the crankshaft inclination angle and better adapt to processing tools. It solves the shortcomings of the prior art device that the central axis of the crankshaft must be in a horizontal state during the clamping process and cannot be widely used in some processing processes.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A crankshaft clamping and fixing mechanism comprises a mounting shell, a driving motor is fixedly connected to one side of the mounting shell, and a driving gear is sleeved on the outer side of the output shaft of the driving motor, the driving gear is located inside the mounting shell, a mounting ring with a vertical plane projection as an arc structure is slidably connected inside the mounting shell, gear teeth are arranged on the outer side of the mounting ring, the mounting ring is meshed and connected to the driving gear through the gear teeth, mounting seats are fixedly connected to the left and right sides of the upper end of the mounting ring respectively, a clamping mechanism is arranged between the two mounting seats, and the crankshaft is fixed by the clamping mechanism.

[0010] Preferably, there are two mounting rings, which are arranged front and back, and each mounting ring has a driving gear meshingly connected at its lower end, and the driving gear is key-connected to the output shaft of the driving motor.

[0011] Preferably, each of the mounting rings is provided with a through groove, and a front-to-rear axial pin is inserted into the through grooves of the two mounting rings. The mounting shell is provided with mounting holes for the pin to pass through front and rear, and the pin is inserted into the mounting hole and movably connected to the mounting shell.

[0012] Preferably, there are two pins, which are arranged on the left and right.

[0013] Preferably, the inner walls on the front and rear sides of the mounting shell are fixedly connected with a positioning shell by bolts I respectively, and spherical grooves are opened near the ends of the two positioning shells, and a limiting ball is rotatably connected in each of the spherical grooves. The limiting ball is embedded in the through groove of the adjacent mounting ring, and the limiting ball abuts against the mounting ring.

[0014] Preferably, the mounting seat includes a fixing block, and a fixing block is respectively arranged on the left and right sides between the two mounting rings. Each of the fixing blocks is fixedly connected to the mounting ring by a bolt II, and there is a gap between each bolt II and the inner wall of the mounting shell.

[0015] Preferably, a mounting plate is fixedly connected to the upper end of each of the fixing blocks, and the clamping mechanism is arranged between the two mounting plates.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model replaces the carrier device of the clamping mechanism with a mounting ring, so that the inclination angle of the clamping mechanism can be synchronously changed during the installation and rotation process. Therefore, compared with the prior art devices, the application range of the present application is wider and can adapt to some crankshaft processing processes with additional requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2This is a schematic diagram of the cooperation between the mounting ring and the driving gear of the utility model;

[0020] Figure 3 This is a schematic diagram of the position relationship between the limiting ball and the through slot of the utility model.

[0021] In the figure: 1. Mounting housing; 2. Pin shaft; 3. Driving motor; 4. Bolt I; 5. Bolt II; 6. Mounting ring; 7. Mounting seat; 701. Fixing block; 702. Mounting plate; 8. Crankshaft; 9. Clamping mechanism; 10. Through groove; 11. Positioning housing; 12. Driving gear; 13. Limiting ball. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] Please refer to Figure 1-3 , a crankshaft clamping and fixing mechanism, consistent with the prior art device, includes a mounting shell 1.

[0025] Different from the prior art devices, the present device is provided with a mounting ring 6 having an arc-shaped structure in vertical plane projection in the mounting shell 1, and the outer side of the constraining mounting ring 6 is a gear-tooth-shaped structure.

[0026] At the same time, a front-to-rear axial driving gear 12 is provided at the lower end of the mounting ring 6 , so that the mounting ring 6 can be meshed and connected with the driving gear 12 through gear teeth, and then the mounting ring 6 is driven to rotate through the driving gear 12 .

[0027] Furthermore, the device is provided with a driving gear 12 on one side of the mounting ring 6, which constrains the output shaft of the driving motor 3 to be key-connected with the driving gear 12, so that the driving motor 3 is used to realize the rotation and anti-reverse of the driving gear 12, thereby ensuring that the rotation angle of the mounting ring 6 is in the state expected by the operator.

[0028] Specifically, the device arranges the two ends of the clamping mechanism 9 required for the crankshaft 8 on the left and right sides of the upper end of the mounting ring 6 through the mounting seat 7. Therefore, when the mounting ring 6 rotates, it can drive the corresponding clamping mechanism 9 and the crankshaft 8 to rotate, so that there is a certain angle between the central axis of the crankshaft 8 and the horizontal plane to meet specific processing requirements.

[0029] Therefore, further, the device is provided with a mounting ring 6 on the front and rear sides of the mounting shell 1 respectively, and the two mounting seats 7 are provided between the two mounting rings 6. This can effectively avoid the imbalance of force on one side of the mounting seat 7 and ensure the stability of the mounting seat 7 during use.

[0030] At the same time, the constraint mounting seat 7 includes a fixing block 701, that is, a fixing block 701 is respectively arranged on the left and right sides between the two mounting rings 6. At this time, bolts Ⅱ5 are respectively screwed on the front and rear ends of each fixing block 701, so that the fixing block 701 can be fixedly connected to the mounting ring 6 through the bolts Ⅱ5. Then, the positions of the two mounting rings 6 can be fixed through the fixing block 701 to ensure that the distance between the two mounting rings 6 does not change.

[0031] Specifically, as shown in the figure, the clamping mechanism 9 described in the present application includes a bidirectional screw, and a fixing plate respectively screwed to the two ends of the bidirectional screw, and a three-jaw chuck and an ejector are respectively provided at the near ends of the two fixing plates. Therefore, through the cooperation of the three-jaw chuck and the ejector, when the distance between the three-jaw chuck and the ejector is changed to adapt to the crankshaft 8, the crankshaft 8 can be completely limited, thereby realizing the clamping and fixation of the crankshaft 8.

[0032] At the same time, in order to ensure that the threaded connection between the bidirectional screw and the fixed plate can function normally, the operator can change the distance between the two fixed plates when turning the bidirectional screw. As shown in the figure, the front and rear sides of the lower ends of the two fixed plates are respectively slidably connected with limit rods, and the fixed plates are limited by the limit rods to ensure that the fixed plates cannot rotate.

[0033] Therefore, in order to achieve position limitation of the bidirectional screw and the limit rod, the device also has a mounting plate 702 fixedly connected to the fixed block 701 by screws, the mounting plate 702 is rotationally connected to the bidirectional screw by bearings, and the mounting plate 702 is fixedly connected to the limit rod by nuts.

[0034] Specifically, in order to prevent the mounting ring 6 from exerting excessive downward pressure on the driving gear 12 and to constrain the movement trajectory of the mounting ring 6, the device is provided with a front-to-back through groove 10 on the mounting ring 6, and a front-to-back axial pin shaft 2 is commonly inserted into the through groove 10 of the two mounting rings 6. It is only necessary to ensure that the position of the pin shaft 2 does not change in order to realize the constraint of the height and movement trajectory of the mounting ring 6.

[0035] Furthermore, there are two pins 2, which are arranged on the left and right. This allows the longitudinal section of the pin 2 to be a circular structure, and there is a minimum contact area between the circular structure and the mounting ring 6, which can fully reduce the friction resistance between the mounting ring 6 and the pin 2.

[0036] It should be noted that the two pins 2 exist at the same time, and the longitudinal section of the pin 2 can be a circular structure to prevent the mounting ring 6 from being subjected to unilateral force and causing unexpected movement.

[0037] Specifically, a mounting hole is opened on the mounting shell 1 to pass through the front and rear of the pin shaft 2. The pin shaft 2 is inserted into the mounting hole and movably connected with the mounting shell 1. This can fix the position of the pin shaft 2 and also allow the pin shaft 2 to rotate relative to the mounting shell 1. This can further reduce the friction resistance between the mounting ring 6 and the pin shaft 2 and extend the service life of the device.

[0038] Furthermore, the device is fixedly connected with a positioning shell 11 on the inner walls of the front and rear sides of the mounting shell 1 by bolts Ⅰ4 respectively, and spherical grooves are opened near the ends of the two positioning shells 11. Therefore, by rotating the limit ball 13 connected in the spherical groove, the limit ball 13 is constrained to be embedded in the through groove 10 of the adjacent mounting ring 6, so that the limit ball 13 abuts against the mounting ring 6. The limit ball 13 can be used to constrain the position of the mounting ring 6 to ensure that the mounting ring 6 cannot move forward or backward.

[0039] Therefore, the device further includes a gap between the bolt II 5 on the fixing block 701 and the inner wall of the mounting shell 1, which can further reduce the friction resistance encountered by the mounting ring 6 during the rotation process.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crankshaft clamping and fixing mechanism, characterized in that: It comprises a mounting shell (1), a driving motor (3) is fixedly connected to one side of the mounting shell (1), and a driving gear (12) is sleeved on the outer side of the output shaft of the driving motor (3), and the driving gear (12) is located inside the mounting shell (1); The installation housing (1) is slidably connected to a mounting ring (6) having an arc-shaped structure in vertical plane projection, and gear teeth are arranged on the outside of the mounting ring (6). The mounting ring (6) is meshed and transmission-connected with a driving gear (12) via the gear teeth. The left and right sides of the upper end of the mounting ring (6) are respectively fixedly connected with mounting seats (7), and a clamping mechanism (9) is provided between the two mounting seats (7), and the crankshaft (8) is fixed by the clamping mechanism (9).

2. A crankshaft clamping and fixing mechanism according to claim 1, characterized in that: There are two mounting rings (6), which are arranged front and back, and each mounting ring (6) has a driving gear (12) meshed and connected at its lower end, and the driving gear (12) is key-connected to the output shaft of the driving motor (3).

3. A crankshaft clamping and fixing mechanism according to claim 2, characterized in that: Each of the mounting rings (6) is provided with a through slot (10), and a front-to-rear axial pin shaft (2) is inserted into the through slots (10) of the two mounting rings (6); The mounting shell (1) is provided with mounting holes extending through the front and rear of the pin shaft (2), and the pin shaft (2) is inserted into the mounting holes and movably connected to the mounting shell (1).

4. A crankshaft clamping and fixing mechanism according to claim 3, characterized in that: The number of the pin shafts (2) is two, and the two pin shafts (2) are arranged on the left and right.

5. The crankshaft clamping and fixing mechanism according to claim 3, characterized in that: The inner walls of the front and rear sides of the installation housing (1) are respectively fixedly connected to positioning housings (11) by bolts I (4), and spherical grooves are formed near the ends of the two positioning housings (11); A limiting ball (13) is rotatably connected in each of the spherical grooves. The limiting ball (13) is embedded in the through groove (10) of the adjacent mounting ring (6). The limiting ball (13) abuts against the mounting ring (6).

6. A crankshaft clamping and fixing mechanism according to claim 5, characterized in that: The mounting seat (7) comprises a fixing block (701), and a fixing block (701) is respectively arranged on the left and right sides between the two mounting rings (6); Each of the fixing blocks (701) is fixedly connected to the mounting ring (6) via a bolt II (5), and a gap exists between each bolt II (5) and the inner wall of the mounting housing (1).

7. A crankshaft clamping and fixing mechanism according to claim 6, characterized in that: The upper end of each fixing block (701) is fixedly connected to a mounting plate (702), and the clamping mechanism (9) is arranged between the two mounting plates (702).

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