A crankshaft tilting fixture

Abstract

The present invention discloses a crankshaft tilting clamp, which belongs to the field of clamp technology and includes a base, an inclined portion and a connecting frame provided on the base, the base being inclined at a certain angle by the inclined portion and being provided with a support plate in an adjustable angle by the connecting frame, a driving cylinder being provided on one side of the support plate, and a pressure claw assembly being provided on the other side for driving connection with the driving cylinder and for pressing and releasing the crankshaft; a radial positioning plate for radially positioning the crankshaft can also be adjusted on the support plate. This structure can improve the clamping stability of the clamp, ensure the machining accuracy of the crankshaft, and stabilize the quality of the finished product. In addition, the transmission efficiency between the driving cylinder and the pressure claw assembly is high, the assembly space is reasonably utilized, the overall volume of the clamp is small, and the components are compactly connected. At the same time, the adjustment of different processing parts of different crankshafts can be realized, and after adjustment, the parts can be directly processed and formed in one go, which greatly improves the machining efficiency and application range of the crankshaft.

Description

Technical Field

[0001] The invention relates to the technical field of clamps, in particular to a crankshaft tilting clamp. Background Art

[0002] The finished product of the crankshaft generally includes a main body consisting of a cylindrical long shaft and a short shaft, and a balance block located between the long shaft and the short shaft. It is one of the key components in the compressor. In order to prevent the crankshaft from detaching from the connecting rod, the crankshaft needs to be tilted so that the crankshaft forms a unique tilt angle and then drilled. The drilling effect directly affects the final quality of the crankshaft.

[0003] However, in the prior art, most drilling methods for the short shaft end of the crankshaft directly use manual drilling at the short shaft end of the crankshaft. The processing is time-consuming, the drilling accuracy is poor, the labor intensity is high, the safety is low, and it is easy to cause work-related accidents. After improvement, the drilling position is pre-drilled on the short shaft end of the crankshaft, and then the crankshaft is clamped on the workbench fixture, and then the drill bit is used to drill an inclined hole in the crankshaft. The operation is divided into two steps to complete, the processing efficiency is low, and the time consumption is long. At the same time, due to the limitation of the fixture, the crankshaft is prone to instability during drilling, resulting in a large deviation in the crankshaft drilling, which cannot meet the use requirements. Moreover, the fixture cannot adjust the clamping and drilling position according to the requirements of the crankshaft drilling position, angle, etc. A set of fixtures can only be used for crankshafts of one specification, and has poor versatility.

[0004] Therefore, further improvement is necessary. Summary of the Invention

[0005] The present invention aims to provide a crankshaft tilting fixture to overcome the deficiencies in the prior art.

[0006] A crankshaft tilting clamp designed for this purpose includes a base, an inclined portion and a connecting frame are provided on the base, the base is tilted at a certain angle by the inclined portion, and a bracket plate is provided at an adjustable angle through the connecting frame, a driving cylinder is provided on one side of the bracket plate, and a pressure claw assembly is provided on the other side that is driven by the driving cylinder and is used to press and release the crankshaft; a radial positioning plate for radially positioning the crankshaft can also be adjustably provided on the bracket plate.

[0007] The angle inclination direction of the inclined portion and the angle adjustment direction of the bracket plate are perpendicular to each other.

[0008] The inclined portion is arranged on the bottom surface of the base and is inclined at 0-45 degrees to the horizontal plane.

[0009] The connecting frames are provided with two and are fixedly arranged at the left and right positions of the base respectively. The connecting frames are provided with connecting frame adjustment slots and connecting frame rotating parts arranged up and down; the bracket plate is provided with a bracket plate first rotating part and a bracket plate second rotating part arranged up and down.

[0010] A frame plate rotating shaft is provided between the second rotating portion of the bracket plate and the rotating portion of the connecting frame, and the two are rotatably matched through the frame plate rotating shaft.

[0011] A frame plate tightening piece is provided between the first rotating portion of the bracket plate and the adjusting groove of the connecting frame, and the two are loosely matched through the frame plate tightening piece.

[0012] There are two driving cylinders, which are fixedly arranged at the left and right positions on one side of the bracket plate; there are two pressure claw assemblies, which are swingably arranged at the left and right positions on the other side of the bracket plate; the bracket plate is penetrated by left and right guide holes at the front and back; the piston rods of the two driving cylinders pass through and are guided to retract on the left and right guide holes, and are driven and connected to the two pressure claw assemblies.

[0013] The bracket plate is also provided with a bracket plate side groove, and the bracket plate side groove is located between the two pressure claw assemblies; the two pressure claw assemblies are driven by the two driving cylinders to swing on the bracket plate, and press the crankshaft or loosen the bracket plate side groove during the swing.

[0014] The side positioning block is replaceably mounted on the side groove of the bracket plate, and the side positioning block is provided with a positioning block side groove. The size of the positioning block side groove is smaller than, larger than, or equal to the size of the side groove of the bracket plate; the two pressure claw assemblies press or loosen the crankshaft from the positioning block side groove when swinging.

[0015] The two pressing claw assemblies include a left pressing claw assembly and a right pressing claw assembly; the bracket plate is fixedly provided with two pressing claw protrusions corresponding to the left pressing claw assembly and the right pressing claw assembly, and the two pressing claw protrusions are respectively provided with a protrusion rotating part.

[0016] The left pressure claw assembly includes a left pressure claw and a left transfer member; a left pressure claw first rotating part is provided at one end of the left pressure claw, and a left pressure claw second rotating part is provided in the middle; a left pressure claw rotating shaft is provided between the left pressure claw first rotating part and one of the protrusion rotating parts, and the two are rotatably matched through the left pressure claw rotating shaft; left transfer member rotating shafts are respectively provided at both ends of the left transfer member, and are rotatably matched with the left pressure claw second rotating part and the piston rod of one of the driving cylinders through the left transfer member rotating shafts at both ends.

[0017] The right pressure claw assembly includes a right pressure claw and a right transfer member; a right pressure claw first rotating part is provided at one end of the right pressure claw, and a right pressure claw second rotating part is provided in the middle; a right pressure claw rotating shaft is provided between the right pressure claw first rotating part and the other protrusion rotating part, and the two are rotatably matched through the right pressure claw rotating shaft; right transfer member rotating shafts are respectively provided at both ends of the right transfer member, and are rotatably matched with the right pressure claw second rotating part and the piston rod of the other driving cylinder through the right transfer member rotating shafts at both ends.

[0018] The other end of the left pressing claw is opposite to the other end of the right pressing claw, and the two are engaged in a concave-convex staggered opening and closing manner to press or loosen the crankshaft.

[0019] There are two radial positioning plates, which are respectively located on the left and right positions above the bracket plate. The two radial positioning plates are respectively provided with elongated grooves; a connecting portion is provided on the bracket plate; a positioning plate tightening piece is provided between the elongated groove and the connecting portion, and the two are loosely and tightly fitted together through the positioning plate tightening piece; the two radial positioning plates can adjust the distance between each other when loosened, and clamp the outer side of the short shaft end of the crankshaft when tightened.

[0020] The two radial positioning plates are respectively provided with a sliding guide portion; the bracket plate is also provided with a sliding guide matching portion; the sliding guide portion is linearly guided and slidingly matched with the sliding guide matching portion.

[0021] The present invention improves the above structure and utilizes the driving cylinder on one side of the bracket plate to drive the pressure claw assembly on the other side of the bracket plate to swing, so that the crankshaft can be pressed and fixed on the bracket plate, and can be released on the bracket plate. Not only can the crankshaft be automatically pressed and released, but it also avoids tedious manual operations, effectively improves production efficiency and reduces labor intensity, and also has the advantages of fast and firm clamping, which is conducive to ensuring the processing accuracy of the crankshaft and stabilizing the quality of the finished product. At the same time, it can also simplify the clamping and loosening structure of the crankshaft and reduce production costs. At the same time, the driving cylinder is directly connected to the pressure plate drive, and its transmission efficiency is high. There will be no power loss problem during operation, which is energy-saving and environmentally friendly. In addition, the driving cylinder is located on one side of the bracket plate, and the pressure claw assembly is located on the other side of the bracket plate. The space utilization is reasonable, the overall volume of the clamp is small, and the components are compactly connected.

[0022] Moreover, the base utilizes an inclined portion to achieve a certain angle of inclination, and a support plate capable of adjusting the angle is provided on the inclined base, so that the support plate can form an angle of inclination in two different directions on the base and an angle adjustment in one of the directions, thereby enabling the crankshaft fixed on the support plate to adjust different angular positions according to different processing requirements. At the same time, a radial positioning plate with an adjustable position on the support plate is utilized to radially position the crankshaft, so that crankshafts of different diameters and eccentric positions can also be firmly fixed on the support plate, thereby improving the scope of use of the fixture. When different crankshafts with different angles, diameters, and eccentric positions need to be processed, only the angle and position of the support plate and the radial positioning plate need to be adjusted, and the crankshafts with different processing requirements can be processed without replacing the fixture, thereby achieving adjustment of different processing parts of different crankshafts, and after adjustment, they can be directly processed and formed in one go, thereby greatly improving the processing efficiency of the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the decomposition structure of an embodiment of the present invention.

[0024] Figure 2 Schematic diagram of the assembly structure of an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the side assembly structure of an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the front assembly structure of an embodiment of the present invention.

[0027] Figure 5 It is a schematic diagram of the assembly structure of the crankshaft, bracket plate, pressure claw assembly, radial positioning plate, side positioning block, and pressure claw protrusion.

[0028] Figure 6 It is a schematic diagram of the exploded structure of the crankshaft, bracket plate, pressure claw assembly, radial positioning plate, side positioning block, and pressure claw protrusion.

[0029] Figure 7 This is a schematic diagram of the exploded structure of the crankshaft, bracket plate, pressure claw assembly, radial positioning plate, side positioning block, and pressure claw protrusion from another perspective.

[0030] Figure 8 It is a schematic diagram of the assembly structure of the left pressure jaw assembly and the right pressure jaw assembly.

[0031] Figure 9 It is a schematic diagram of the exploded structure of the left pressure jaw assembly and the right pressure jaw assembly. DETAILED DESCRIPTION

[0032] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] See also Figures 1-9 The crankshaft tilting fixture includes a base 1, on which an inclined portion 2 and a connecting frame 3 are provided. The base 1 is inclined at a certain angle through the inclined portion 2 and is provided with a bracket plate 4 that can be adjusted at an angle through the connecting frame 3. A driving cylinder 5 is provided on one side of the bracket plate 4, and a pressure claw assembly that is driven and connected to the driving cylinder 5 and presses and releases the crankshaft 6 is provided on the other side; a radial positioning plate 7 for radially positioning the crankshaft 6 can also be adjustably provided on the bracket plate 4.

[0035] This embodiment uses the driving cylinder 5 on one side of the bracket plate 4 to drive the pressure claw assembly on the other side of the bracket plate 4 to swing, so that the crankshaft 6 can be pressed and fixed on the bracket plate 4, and can be released on the bracket plate 4. It not only allows the crankshaft 6 to be automatically pressed and released, but also avoids tedious manual operations, effectively improves production efficiency and reduces labor intensity, and also has the advantages of fast and firm clamping, which is conducive to ensuring the processing accuracy of the crankshaft 6 and stabilizing the quality of the finished product. At the same time, it can also simplify the clamping and loosening structure of the crankshaft 6, reduce production costs, and at the same time, the driving cylinder 6 is directly connected to the pressure plate 8 for driving. It has high transmission efficiency, does not cause power loss problems during work, and is energy-saving and environmentally friendly. In addition, the driving cylinder 5 is located on one side of the bracket plate 4, and the pressure claw assembly is located on the other side of the bracket plate 4. Its space utilization is reasonable, the overall volume of the clamp is small, and the components are compactly connected.

[0036] Moreover, the base 1 utilizes the inclined portion 2 to achieve a certain angle of inclination, and a support plate 4 capable of adjusting the angle is provided on the inclined base 1, so that the support plate 4 can form an angle of inclination in two different directions on the base 1 and an angle adjustment in one direction, thereby enabling the crankshaft 6 fixed on the support plate 4 to adjust different angular positions according to different processing requirements. At the same time, the radial positioning plate 7 with an adjustable position on the support plate 4 is utilized to radially position the crankshaft 6, so that crankshafts 6 of different diameters and eccentric positions can also be firmly fixed on the support plate 4, thereby improving the scope of use of the fixture. When it is necessary to process different crankshafts 6 of different angles, diameters, and eccentric positions, it is only necessary to adjust the angle and position of the support plate 4 and the radial positioning plate 7, so that the crankshafts 6 of different processing requirements can be processed without replacing the fixture, so as to achieve adjustment of different processing parts of different crankshafts 6, and after adjustment, they can be directly processed and formed in one go, greatly improving the processing efficiency of the crankshaft 6.

[0037] Specifically, the angle tilting direction of the tilting portion 2 and the angle adjustment direction of the bracket plate 4 are perpendicular to each other.

[0038] The inclined portion 2 is provided on the bottom surface of the base 1 and is inclined at an angle of 0-45 degrees to the horizontal plane.

[0039] In this embodiment, the inclined portion 2 is inclined to one side on the bottom surface of the base 1, and its horizontal plane is inclined at 3 degrees. The bracket plate 4 is arranged on the base 1 in an adjustable angle in the front and back direction perpendicular to the inclined direction of the inclined portion 2.

[0040] In order to improve the angle adjustment stability of the bracket plate 4, two connecting frames 3 are provided, and are fixedly arranged at the left and right positions of the base 1 respectively. The connecting frames 3 are provided with connecting frame adjustment slots 8 and connecting frame rotating parts 9 arranged in an upper and lower manner; the bracket plate 4 is provided with a bracket plate first rotating part 10 and a bracket plate second rotating part 11 arranged in an upper and lower manner.

[0041] During assembly, a frame plate rotating shaft 12 is provided between the second rotating portion 11 of the bracket plate and the connecting frame rotating portion 9, and the two are rotatably engaged via the frame plate rotating shaft 12. A frame plate tightening member 13 is provided between the first rotating portion 10 of the bracket plate and the connecting frame adjusting slot 8, and the two are loosely and tightly engaged via the frame plate tightening member 13.

[0042] When the frame plate tensioner 13 is loosened, the bracket plate 4 can be rotated on the connecting frame rotating part 9 of the connecting frame 3 through the bracket plate second rotating part 11. At the same time, during rotation, the bracket plate 4 can be guided along the trajectory of the connecting frame adjustment slot 8 by the frame plate tensioner 13, thereby adjusting the angle of the bracket plate 4.

[0043] When the angle of the bracket plate 4 is adjusted to a suitable position, the bracket plate tightening member 13 can be tightened between the first rotating portion 10 of the bracket plate and the connecting frame adjustment slot 8 to lock the adjustment angle of the bracket plate 4, which is easy to operate.

[0044] In order to ensure that the transmission between the driving cylinder 5 and the pressure claw assembly is more stable, two driving cylinders 5 are provided, and are fixedly set at the left and right positions on one side of the bracket plate 4; two pressure claw assemblies are provided, and are swingably set at the left and right positions on the other side of the bracket plate 4; the bracket plate 4 is penetrated by left and right guide holes 14 in front and back; the piston rods of the two driving cylinders 5 pass through and are guided to retract on the left and right guide holes 14, and are driven and connected to the two pressure claw assemblies.

[0045] When the driving cylinder 5 is working, it drives the piston rod to perform guided telescopic movement in the guide hole 14, thereby ensuring that the piston rod will not bend or deform during telescoping. The piston rod drives the pressure claw assembly to swing during telescoping, thereby ensuring effective transmission between the piston rod and the pressure claw assembly, and then allowing the pressure claw assembly to be effectively pressed and fixed on the crankshaft 6, ensuring that the crankshaft 6 will not be displaced during processing.

[0046] In order to improve the pressing stability of the crankshaft 6, a bracket plate side groove 15 is also provided on the bracket plate 4. The bracket plate side groove 15 of this embodiment is V-shaped and is located between the two pressure claw assemblies; the two pressure claw assemblies are driven by two driving cylinders 5 to swing on the bracket plate 4, and press the crankshaft 6 or loosen the bracket plate side groove 15 during the swing.

[0047] One side of the crankshaft 6 of this embodiment is pressed and fixed by two pressure claw assemblies, and the other side is positioned in the groove 15 on the side of the bracket plate, so that the positioning is stable and there will be no displacement problem.

[0048] A side positioning block 16 is replaceably mounted on the side groove 15 of the bracket plate, and a positioning block side groove 17 is provided on the side positioning block 16. The size of the positioning block side groove 17 is smaller than, larger than, or equal to the size of the side groove 15 of the bracket plate; the two pressure claw assemblies press or loosen the crankshaft 6 from the positioning block side groove 17 when swinging.

[0049] In this embodiment, one side of the side positioning block 16 is provided with a mating position that matches the positioning block side groove 17, and the mating position cooperates with the positioning block side groove 17. The positioning block side groove 17 is provided on the other side of the side positioning block 16. Users can replace different side positioning blocks 16 according to different processing requirements to suit different crankshafts 6 for pressing and fastening.

[0050] That is, if the crankshaft 6 is large in size, the side groove 15 of the bracket plate can be directly used to press and fix the crankshaft 6 in place. If the crankshaft 6 is small in size, a side positioning block 16 can be placed on the side groove 15 of the bracket plate, and then the positioning block side groove 17 on the side positioning block 16 can be used to press and fix the crankshaft 6 in place, so as to increase the scope of use of the clamp.

[0051] In this embodiment, the two pressure claw assemblies include a left pressure claw assembly 18 and a right pressure claw assembly 19; the bracket plate 4 is fixed with two pressure claw protrusions 20 corresponding to the left pressure claw assembly 18 and the right pressure claw assembly 19, and the two pressure claw protrusions 20 are respectively provided with a protrusion rotating part 21.

[0052] The left pressure claw assembly 18 includes a left pressure claw 22 and a left adapter 23; a left pressure claw first rotating portion is provided at one end of the left pressure claw 22, and a left pressure claw second rotating portion 25 is provided in the middle; a left pressure claw rotating shaft 26 is provided between the left pressure claw first rotating portion and one of the protrusion rotating portions 21, and the two are rotatably matched through the left pressure claw rotating shaft 26; left adapter rotating shafts 27 are respectively provided at both ends of the left adapter 23, and are rotatably matched with the left pressure claw second rotating portion 25 and the piston rod of one of the driving cylinders 5 through the left adapter rotating shafts 27 at both ends.

[0053] The right pressure claw assembly 19 includes a right pressure claw 28 and a right adapter 29; a right pressure claw first rotating portion is provided at one end of the right pressure claw 28, and a right pressure claw second rotating portion 30 is provided in the middle; a right pressure claw rotating shaft 31 is provided between the right pressure claw first rotating portion and the other protrusion rotating portion 21, and the two are rotatably matched through the right pressure claw rotating shaft 31; right adapter rotating shafts 32 are respectively provided at both ends of the right adapter 29, and are rotatably matched with the right pressure claw second rotating portion 30 and the piston rod of the other driving cylinder 5 through the right adapter rotating shafts 32 at both ends.

[0054] The left pressure claw assembly 18 and the right pressure claw assembly 19 of this embodiment swing on their respective pressure claw protrusions 20, respectively, so that the left pressure claw assembly 18 and the right pressure claw assembly 19 can swing over a large range, thereby forming sufficient clearance space for the crankshaft 6 to loosen and forming sufficient action stroke to press the crankshaft 6.

[0055] The other end of the left pressure claw 22 is opposite to the other end of the right pressure claw 28, and the two are arranged in a concave-convex staggered opening and closing manner to press or loosen the crankshaft 6. The concave-convex and staggered opening and closing manner between the left pressure claw 22 and the right pressure claw 28 can form more action positions on the crankshaft 6, further improving the pressing stability of the crankshaft 6.

[0056] Two radial positioning plates 7 are provided and are respectively located on the left and right positions above the bracket plate 4. The two radial positioning plates 7 are respectively provided with an elongated groove 33; a connecting portion 34 is provided on the bracket plate 4; a positioning plate tightening piece 35 is provided between the elongated groove 33 and the connecting portion 34, and the two are loosely and tightly fitted through the positioning plate tightening piece 35; the two radial positioning plates 7 can adjust the distance between each other when loosened, and clamp the outer side of the short axis end of the crankshaft 6 when tightened.

[0057] When the positioning plate tightening piece 35 is loosened, the two radial positioning plates 7 can be guided to slide along the track of the elongated slot 33 by the positioning plate tightening piece 35, thereby adjusting the distance between the two radial positioning plates 7 to adapt to crankshafts 6 of different diameters.

[0058] When the distance between the two radial positioning plates 7 is adjusted to a suitable position, the distance between the two radial positioning plates 7 can be locked by tightening the positioning plate tightener 35 on the elongated slot 33 and the connecting portion 34, which is easy to operate.

[0059] In order to avoid the problem of displacement of the distance between the two radial positioning plates 7 after adjustment, four positioning plate tensioners 35 are provided in this embodiment, that is, each radial positioning plate 7 is locked by two positioning plate tensioners 35, which has high stability.

[0060] The two radial positioning plates 7 are also provided with sliding guide parts 36 respectively; the bracket plate 4 is also provided with a sliding guide matching part 37; the sliding guide part 36 and the sliding guide matching part 37 are linearly guided and slidably matched to improve the adjustment stability of the radial positioning plate 7 so that it can be slidably adjusted at the specified position.

[0061] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A crankshaft tilting fixture, comprising a base (1), characterized in that: The base (1) is provided with an inclined portion (2) and a connecting frame (3); the base (1) is inclined at a certain angle by the inclined portion (2), and is provided with a support plate (4) in an adjustable angle by the connecting frame (3); a driving cylinder (5) is provided on one side of the support plate (4), and a pressure claw assembly is provided on the other side thereof, which is connected to the driving cylinder (5) and is used to press and release the crankshaft (6); a radial positioning plate (7) is also adjustable on the support plate (4) for radially positioning the crankshaft (6); The angle inclination direction of the inclined portion (2) and the angle adjustment direction of the bracket plate (4) are perpendicular to each other; Two driving cylinders (5) are provided and are fixedly arranged at left and right positions on one side of the bracket plate (4); two pressure claw assemblies are provided and are swingably arranged at left and right positions on the other side of the bracket plate (4); left and right guide holes (14) are passed through the front and back of the bracket plate (4); the piston rods of the two driving cylinders (5) respectively pass through and are guided to be telescopically extended on the left and right guide holes (14), and are driven and connected to the two pressure claw assemblies; The two pressing claw assemblies include a left pressing claw assembly (18) and a right pressing claw assembly (19); the bracket plate (4) is respectively fixed with two pressing claw protrusions (20) corresponding to the left pressing claw assembly (18) and the right pressing claw assembly (19); and the two pressing claw protrusions (20) are respectively provided with a protrusion rotating portion (21); The left pressure claw assembly (18) includes a left pressure claw (22) and a left transfer member (23); a left pressure claw first rotating portion is provided at one end of the left pressure claw (22), and a left pressure claw second rotating portion (25) is provided in the middle; a left pressure claw rotating shaft (26) is provided between the left pressure claw first rotating portion and one of the protrusion rotating portions (21), and the two are rotationally matched through the left pressure claw rotating shaft (26); left transfer member rotating shafts (27) are provided at both ends of the left transfer member (23), and are rotationally matched with the left pressure claw second rotating portion (25) and the piston rod of one of the driving cylinders (5) through the left transfer member rotating shafts (27) at both ends; The structure of the right pressure claw assembly (19) is the same as that of the left pressure claw assembly (18); The other end of the left pressure claw (22) is opposite to the other end of the right pressure claw (28), and the two are engaged in a concave-convex staggered opening and closing manner to press or loosen the crankshaft (6).

2. The crankshaft tilting fixture according to claim 1, characterized in that: The inclined portion (2) is arranged on the bottom surface of the base (1) and is inclined at an angle of 0-45 degrees to the horizontal plane.

3. The crankshaft tilting fixture according to claim 1, characterized in that: The connecting frame (3) is provided with two and is fixedly arranged at the left and right positions of the base (1), respectively. The connecting frame (3) is provided with a connecting frame adjustment slot (8) and a connecting frame rotating portion (9) arranged in an upper and lower manner; the bracket plate (4) is provided with a bracket plate first rotating portion (10) and a bracket plate second rotating portion (11) arranged in an upper and lower manner; A frame plate rotating shaft (12) is provided between the second rotating portion (11) of the bracket plate and the rotating portion (9) of the connecting frame, and the two are rotatably matched via the frame plate rotating shaft (12); A frame plate tightening member (13) is provided between the first rotating portion (10) of the bracket plate and the connecting frame adjusting slot (8), and the two are tightly matched via the frame plate tightening member (13).

4. The crankshaft tilting fixture according to claim 1, characterized in that: The support plate (4) is further provided with a support plate side groove (15), and the support plate side groove (15) is located between the two pressure claw assemblies; the two pressure claw assemblies are driven by the two driving cylinders (5) to swing on the support plate (4), and press the crankshaft (6) to or loosen the support plate side groove (15) during the swinging.

5. The crankshaft tilting fixture according to claim 4, characterized in that: A side positioning block (16) is replaceably mounted on the side groove (15) of the bracket plate. A positioning block side groove (17) is provided on the side positioning block (16). The size of the positioning block side groove (17) is smaller than, larger than, or equal to the size of the side groove (15) of the bracket plate. The two pressing claw assemblies press the crankshaft (6) into or release the positioning block side groove (17) when swinging.

6. The crankshaft tilting fixture according to claim 1, characterized in that: Two radial positioning plates (7) are provided and are respectively located at left and right positions above the bracket plate (4); the two radial positioning plates (7) are respectively provided with an elongated slot (33); the bracket plate (4) is provided with a connecting portion (34); a positioning plate tightening member (35) is provided between the elongated slot (33) and the connecting portion (34), and the two are loosely and tightly fitted through the positioning plate tightening member (35); the two radial positioning plates (7) can adjust the distance between each other when loosening, and clamp the outer side of the short shaft end of the crankshaft (6) when tightening; The two radial positioning plates (7) are respectively provided with a sliding guide portion (36); the bracket plate (4) is also provided with a sliding guide matching portion (37); the sliding guide portion (36) and the sliding guide matching portion (37) are linearly guided and slidingly matched.

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