Lifting appliance suitable for engine cylinder cover

Abstract

The utility model relates to a lifting appliance suitable for an engine cylinder cover, which comprises an inverted U-shaped lifting ring, two V-shaped upper connecting rods are inserted in the lifting ring, the upper ends of the upper connecting rods are hinged with the lifting ring through upper pin shafts, two X-shaped lower connecting rods are arranged below the upper connecting rods, and the two lower connecting rods are hinged together through lower pin shafts; the upper end of the lower connecting rod is hinged to the lower end of the upper connecting rod through a middle pin shaft, an external thread connecting pipe extending downwards is formed at the lower end of the lower connecting rod, and guide grooves are formed in the outer walls of the two opposite sides of the external thread connecting pipe respectively; the lower portions of the lower connecting rods are connected with clamping jaws with circular sections, each clamping jaw comprises an inclined upper supporting rod and a horizontal lower supporting rod, the lower supporting rods on the lower sides of the two lower connecting rods are parallel, and the lower supporting rods are not located under the lower connecting rods. The angles of the clamping jaws on the lifting appliance are changed, so that the cylinder cover can be clamped and supported, and the stability can be effectively improved.

Description

Technical fields:

[0001] This utility model relates to the technical field of lifting devices, and more specifically to a lifting device suitable for engine cylinder heads. Background technology:

[0002] With the development of my country's engine industry, the requirements for diesel engine production efficiency are becoming increasingly stringent, and the existing cylinder head transportation methods can no longer meet these demands. To meet production needs, it is necessary to change the current manual cylinder head transportation method. For example, hoisting can be used for transfer. Hoisting requires the design of appropriate hoisting clamps and lifting devices. Some existing lifting devices generally have a jaw structure, which clamps the cylinder head by its openings. It can clamp the cylinder head in the middle of both sides, but during the clamping process, it has been found that the cylinder head is prone to tilting forward or backward, resulting in poor stability and a risk of the cylinder head falling off. Therefore, it is necessary to optimize and improve the jaws to effectively support the cylinder head and improve the stability of the hoisting and movement. Utility Model Content:

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a lifting device suitable for engine cylinder heads. The angle of the grippers on the lifting device has been changed, which can clamp and support the cylinder head and effectively improve stability. At the same time, the grippers can be extended and retracted to change the distance between the grippers, making it suitable for clamping and lifting cylinder heads of various sizes.

[0004] A lifting device for engine cylinder heads includes an inverted U-shaped lifting ring. Two upper connecting rods forming a V-shape are inserted into the lifting ring. The upper ends of the upper connecting rods are hinged to the lifting ring via upper pins. Below the upper connecting rods are two lower connecting rods that cross each other in an X-shape. The two lower connecting rods are hinged together via lower pins. The upper ends of the lower connecting rods are respectively hinged to the lower ends of the upper connecting rods via middle pins. The lower ends of the lower connecting rods are formed with downwardly extending externally threaded connecting tubes. Guide grooves are formed on the opposite outer walls of the externally threaded connecting tubes.

[0005] The lower part of the lower connecting rod is connected to a gripper with a circular cross section. The gripper includes an inclined upper support rod and a horizontal lower support rod. The upper end of the upper support rod is inserted into the external threaded connecting tube and a limiting post perpendicular to the upper support rod is inserted. The two ends of the limiting post pass through the guide groove of the external threaded connecting tube and abut against the adjusting nut. The adjusting nut is screwed and fixed to the external threaded connecting tube on the lower side of the limiting post.

[0006] The lower support rods on the lower sides of the two lower connecting rods are parallel, and the lower support rods are not directly below the lower connecting rods.

[0007] Preferably, the gripper is made of round steel bent into shape, and the included angle between the upper support rod and the lower support rod is 45° to 60°.

[0008] Preferably, the diameter of the upper support rod is equal to the diameter of the inner hole of the external threaded connecting pipe, the diameter of the limiting post is equal to the groove width of the guide groove on the external threaded connecting pipe, and the diameter of the limiting post is not greater than the diameter of the upper support rod.

[0009] Preferably, a locking nut is screwed onto the external threaded connecting pipe on the lower side of the adjusting nut, and the locking nut abuts against the lower end face of the adjusting nut.

[0010] Preferably, a spring is inserted into the upper part of the external threaded connecting pipe, with the upper end of the spring pressing against the lower connecting rod and the lower end pressing against the upper support rod.

[0011] Preferably, the thickness of the upper connecting rod is equal to the thickness of the lower connecting rod, and the length of the lower connecting rod is greater than the length of the upper connecting rod.

[0012] Preferably, the angle between the projection of the lower connecting rod in the horizontal plane and the lower support rod is 45° to 60°.

[0013] The beneficial effects of this utility model are as follows:

[0014] The angle of the grippers on this lifting tool has been modified to grip and support the cylinder head, effectively improving stability. At the same time, the grippers can be extended and adjusted to change the spacing between them, making it suitable for clamping and lifting cylinder heads of various sizes. Attached image description:

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 This is a front view schematic diagram of the cylinder head clamping structure of this utility model;

[0018] Figure 4 This is a side view of the cylinder head clamping structure of this utility model.

[0019] In the diagram: 1. Lifting ring; 2. Upper connecting rod; 3. Lower connecting rod; 31. External threaded connecting pipe; 32. Guide groove; 4. Gripper; 41. Upper support rod; 42. Lower support rod; 5. Limiting pin; 6. Adjusting nut; 7. Locking nut; 8. Lower pin; 9. Middle pin; 10. Upper pin; 11. Spring; 12. Cylinder head. Detailed implementation method:

[0020] Example: See Figures 1 to 4As shown, a lifting device suitable for engine cylinder heads includes an inverted U-shaped lifting ring 1. Two upper connecting rods 2 forming a V-shape are inserted into the lifting ring 1. The upper ends of the upper connecting rods 2 are hinged to the lifting ring 1 via an upper pin 10. Below the upper connecting rods 2, two lower connecting rods 3 intersecting in an X-shape are provided. The two lower connecting rods 3 are hinged together via a lower pin 8. The upper ends of the lower connecting rods 3 are respectively hinged to the lower ends of the upper connecting rods 2 via a middle pin 9. The lower ends of the lower connecting rods 3 are formed with downwardly extending externally threaded connecting tubes 31. Guide grooves 32 are formed on the opposite outer walls of the externally threaded connecting tubes 31.

[0021] The lower part of the lower connecting rod 3 is connected to a gripper 4 with a circular cross section. The gripper 4 includes an inclined upper support rod 41 and a horizontal lower support rod 42. The upper end of the upper support rod 41 is inserted into the external threaded connecting tube 31 and a limiting post 5 perpendicular to the upper support rod 41 is inserted. The two ends of the limiting post 5 pass through the guide groove 32 of the external threaded connecting tube 31 and abut against the adjusting nut 6. The adjusting nut 6 is screwed and fixed to the external threaded connecting tube 31 on the lower side of the limiting post 5.

[0022] The lower support rods 42 on the lower sides of the two lower connecting rods 3 are parallel, and the lower support rods 42 are not directly below the lower connecting rods 3. That is, there is an angle between the projection of the lower connecting rod 3 on the horizontal plane and the lower support rod 42. The angle between the projection of the lower connecting rod 3 on the horizontal plane and the lower support rod 42 is 45° to 60°, thus ensuring that there is a suitable distance between the two lower support rods 42. If the angle is smaller, the distance between the lower support rods 42 is smaller, and vice versa. If the distance is too large, the lower support rods 42 are only set on both sides of the bottom of the cylinder head 12, which poses a risk of the cylinder head 12 falling off. If the distance is too small, the lower support rods 42 are only set in the middle of the cylinder head 12, which may cause the cylinder head 12 to tilt forward or backward. A suitable distance can achieve a reasonable distribution of the lower support rods 42 and effectively support the cylinder head 12.

[0023] The gripper 4 is formed by bending round steel. The included angle between the upper support rod 41 and the lower support rod 42 is 45° to 60°. The gripper 4 in the figure adopts an included angle of 60°.

[0024] The diameter of the upper support rod 41 is equal to the diameter of the inner hole of the external threaded connecting pipe 31, the diameter of the limiting post 5 is equal to the groove width of the guide groove 32 on the external threaded connecting pipe 31, and the diameter of the limiting post 5 is not greater than the diameter of the upper support rod 41.

[0025] A locking nut 7 is screwed onto the external threaded connecting pipe 31 on the lower side of the adjusting nut 6. The locking nut 7 abuts against the lower end face of the adjusting nut 6 and can prevent the position of the adjusting nut 6 from changing.

[0026] A spring 11 is inserted into the upper part of the external threaded connecting pipe 31. The upper end of the spring 11 presses against the lower connecting rod 3 and the lower end presses against the upper support rod 41. The spring 11 is designed so that the gripper 4 can move down automatically when its position is adjusted.

[0027] The thickness of the upper connecting rod 2 is equal to the thickness of the lower connecting rod 3, and the length of the lower connecting rod 3 is greater than the length of the upper connecting rod 2.

[0028] Working principle: This structure is a lifting tool suitable for engine cylinder heads. The lifting tool first modifies the angle of the gripper 4 by rotating the upper support rod 41 of the originally vertically positioned gripper 4. The position of the upper support rod 41 remains unchanged, but the lower support rod 42 becomes horizontally inclined. Furthermore, the two sets of grippers 4 rotate in opposite directions, achieving parallel arrangement of the lower support rods 42. When clamping the cylinder head 12, if... Figure 3 As shown, the lower support rod 42 can be supported on the lower bottom surface of the cylinder head 12, and the upper support rod 41 abuts against the side walls on both sides of the cylinder head 12, which can effectively expand the support points of the cylinder head 12 and prevent the cylinder head 12 from tilting forward or backward.

[0029] When clamping cylinder heads 12 of different widths, in order to ensure that the lower support rod 42 is horizontally supported on the cylinder head 12 during clamping, it is necessary to adjust the distance between the lower ends of the two upper support rods 41. This is achieved by rotating the adjusting nut 6 to move the jaws 4 downward.

[0030] The embodiments described herein are illustrative and not intended to limit the scope of the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.

Claims

1. A lifting device for engine cylinder heads, comprising an inverted U-shaped lifting ring (1), wherein two upper connecting rods (2) forming a V-shape are inserted into the lifting ring (1), the upper ends of the upper connecting rods (2) are hinged together with the lifting ring (1) via an upper pin (10), and two lower connecting rods (3) intersecting in an X-shape are provided below the upper connecting rods (2), the two lower connecting rods (3) being hinged together via a lower pin (8); the upper ends of the lower connecting rods (3) are respectively hinged together with the lower ends of the upper connecting rods (2) via a central pin (9), characterized in that: The lower end of the lower connecting rod (3) is formed with a downwardly extending external threaded connecting tube (31), and guide grooves (32) are formed on the opposite outer walls of the external threaded connecting tube (31); The lower part of the lower connecting rod (3) is connected to a gripper (4) with a circular cross section. The gripper (4) includes an inclined upper support rod (41) and a horizontal lower support rod (42). The upper end of the upper support rod (41) is inserted into the external threaded connecting tube (31) and a limiting post (5) perpendicular to the upper support rod (41) is inserted. The two ends of the limiting post (5) pass through the guide groove (32) of the external threaded connecting tube (31) and abut against the adjusting nut (6). The adjusting nut (6) is screwed and fixed on the external threaded connecting tube (31) on the lower side of the limiting post (5). The lower support rods (42) on the lower side of the two lower connecting rods (3) are parallel, and the lower support rods (42) are not directly below the lower connecting rods (3).

2. A lifting device suitable for use with an engine cylinder head according to claim 1, characterised in that: The gripper (4) is formed by bending round steel, and the included angle between the upper support rod (41) and the lower support rod (42) is 45° to 60°.

3. A lifting harness suitable for use with an engine cylinder head according to claim 2, characterised in that: The diameter of the upper support rod (41) is equal to the diameter of the inner hole of the external threaded connecting pipe (31), the diameter of the limiting post (5) is equal to the groove width of the guide groove (32) on the external threaded connecting pipe (31), and the diameter of the limiting post (5) is not greater than the diameter of the upper support rod (41).

4. A lifting harness suitable for use with an engine cylinder head as defined in claim 1, wherein: A locking nut (7) is screwed onto the external threaded connecting pipe (31) on the lower side of the adjusting nut (6), and the locking nut (7) abuts against the lower end face of the adjusting nut (6).

5. A lifting harness suitable for use with an engine cylinder head as defined in claim 1, wherein: A spring (11) is inserted into the upper part of the external threaded connecting pipe (31). The upper end of the spring (11) presses against the lower connecting rod (3) and the lower end presses against the upper support rod (41).

6. A lifting harness suitable for use with an engine cylinder head as defined in claim 1, wherein: The thickness of the upper link (2) is equal to the thickness of the lower link (3), and the length of the lower link (3) is greater than the length of the upper link (2).

7. A lifting harness suitable for use with an engine cylinder head as defined in claim 1, wherein: The angle between the projection of the lower connecting rod (3) in the horizontal plane and the lower support rod (42) is 45° to 60°.

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