Piston lifting tool

Abstract

The utility model discloses a piston lifting tool which comprises a supporting rod, the bottom of the supporting rod is of a conical structure and sleeved with a connecting block, a plurality of installation lugs are formed on the outer side of the connecting block at equal intervals, kidney-shaped holes are formed in the installation lugs, bolts are connected to the installation lugs in a sliding mode, and clamping blocks are installed at the bottoms of the bolts. Each clamping block is divided into three identical parts by an integral cylinder structure, an inner conical surface is arranged on one side, close to the conical structure of the supporting rod, of each clamping block, each clamping block is in matched sliding connection with the conical structure of the supporting rod, the outer circle of each clamping block expanded by the conical structure of the supporting rod is circular, and an outer conical surface tightly matched with the inverted cone of the piston is arranged at the top of each clamping block. According to the structure, the outer conical surface of the outer side of the clamping block is optimally designed, so that the outer conical surface of the top of the clamping block can be completely attached to the conical surface of the upper necking opening in the pit of the piston in the circumferential direction after the clamping block is expanded, the contact surface of the clamping block and the piston is increased, the hoisting stability and safety are improved, the operation is simple and convenient, and the use is safer and more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to hoisting tool technical field, especially piston hoisting tool. BACKGROUND

[0002] The top of the high-power gas engine piston is inverted cone pit structure, the existing piston hoisting tool forms self-locking by supporting the large outer diameter and cooperating with the inverted cone pit of the piston top.

[0003] As shown in the description Figure 1 The prior art discloses a piston hoisting tool, and the application number is 201920753021.9, the above-mentioned patent mainly includes a clamping block, a connecting block and a lifting rod, the number of clamping blocks is three, each clamping block is in a fan ring structure, the upper end surface of each clamping block is provided with a threaded hole, the three clamping blocks in the fan ring structure are surrounded to form a separable annular structure, the inner hole of the annular structure gradually expands from top to bottom to form a tapered hole, the center of the connecting block is provided with a through hole, the circumference of the connecting block is provided with three connecting arms, each connecting arm is provided with a guide hole, the lower end of the lifting rod gradually expands to form a tapered opening part, which is adapted to the tapered hole of the annular structure, each clamping block is arranged below the corresponding connecting arm of the connecting block and is screwed with the threaded hole of the connecting block through the screw rod of the bolt and the guide hole of the connecting arm, the upper end of the lifting rod passes through the tapered hole of the annular structure and the through hole of the connecting block, and the opening part of the lower end of the lifting rod is matched with the tapered hole of the annular structure to form the piston hoisting tool. Although the above-mentioned patent can hoist the piston through the cooperation of the clamping blocks, the clamping blocks are standard circular when not opened, and the outer circle of the clamping block opening is not a standard circular structure due to the unreasonable design of the diameter reduction structure on the outer peripheral wall of the clamping block after opening, so that the clamping block only realizes three-point contact after cooperating with the inverted cone pit of the piston top, the self-locking is not stable enough, the stability of the clamping block and the piston is reduced, there is a great risk of falling during lifting, and the safety is low. Therefore, the utility model provides a piston hoisting tool to solve the problems in the above-mentioned background art. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a piston hoisting tool, which is optimized in the outer taper surface of the clamping block, so that the outer taper surface of the clamping block top completely matches the inner upper tapered opening surface of the piston pit after opening, the contact surface of the clamping block and the piston is increased, the lifting stability and safety are improved, and the operation is simple, safe and reliable.

[0005] To achieve the above-mentioned purpose, a piston lifting tool is provided, including a support rod, the bottom of the support rod is set to a conical structure and is sleeved with a connecting block, a plurality of mounting ears are equidistantly formed on the outside of the connecting block, waist holes are opened inside the mounting ears and bolts are slidably connected, and a clamping block is installed at the bottom of the bolt, and the clamping block is divided into three identical parts by the overall cylindrical structure, and an inner conical surface is provided on the side of the clamping block close to the conical structure of the support rod, and the clamping block is slidably connected with the conical structure of the support rod, and the outer circle of the clamping block after being expanded by the conical structure of the support rod is circular, and the top of the clamping block is provided with an outer conical surface that is tightly matched with the inverted cone of the piston, and the side of the clamping block close to the outer conical surface is provided with a fitting portion that is in contact with the inner wall of the piston.

[0006] According to the piston lifting tool, a lifting ring is screwed and connected to the top of the support rod.

[0007] According to the piston lifting tool, the interior of the support rod and the interior of the clamping block are both provided with grooves to form a hollow structure.

[0008] The utility model has the following beneficial effects:

[0009] Compared with the existing technology, this piston lifting tool optimizes the design of the outer conical surface on the outside of the clamping block, so that after the clamping block is expanded, its top outer conical surface can completely fit circumferentially with the upper tapered conical surface in the piston pit, thereby increasing the contact area between the clamping block and the piston, which is beneficial to improving the lifting stability and safety, and is easy to operate and safer and more reliable to use.

[0010] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0012] Figure 1 This is a structural diagram of the existing clamping block and piston after being tightened;

[0013] Figure 2 This is a schematic diagram of the overall structure of the piston lifting tool of the utility model;

[0014] Figure 3 This is a schematic cross-sectional view of the utility model piston lifting tool in a state of being used in conjunction with a piston;

[0015] Figure 4 This is a structural diagram of the piston lifting tool of the utility model after the clamping block and the piston are tightly fitted;

[0016] Figure 5 For the utility model piston lifting tool Figure 4Schematic diagram of the side cross-sectional structure.

[0017] Legend:

[0018] 1. Clamping block; 2. Connecting block; 3. Support rod; 4. Lifting ring; 5. Bolt; 6. Outer cone surface; 7. Fitting part. DETAILED DESCRIPTION

[0019] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention 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 overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0020] Reference Figures 2-5 The piston lifting tool of the present utility model embodiment includes a support rod 3, the bottom of the support rod 3 is set to a conical structure and is sleeved with a connecting block 2, a plurality of mounting ears are equidistantly formed on the outside of the connecting block 2, waist holes are opened inside the mounting ears and bolts 5 are slidably connected, and a clamping block 1 is installed at the bottom of the bolt 5, and the clamping block 1 is divided into three identical parts by the overall cylindrical structure. The clamping block 1 is provided with an inner conical surface on the side close to the conical structure of the support rod 3, and the clamping block 1 is slidably connected with the conical structure of the support rod 3. The outer circle of the clamping block 1 after being expanded by the conical structure of the support rod 3 is circular, and the top of the clamping block 1 is provided with an outer conical surface 6 that is tightly matched with the inverted cone of the piston, and the side of the clamping block 1 close to the outer conical surface 6 is provided with a fitting portion 7 that contacts the inner wall of the piston.

[0021] The clamping block 1 is a split structure, mates with the support rod 3 in a tapered manner, allowing the outer diameter of the clamping block 1 to change with the movement of the support rod 3. The movement of the clamping block 1 is connected by bolts 5 that mate with the waist holes of the connecting block 2, ensuring smooth movement of the clamping block 1. During lifting, the clamping block 1 expands to a standard circular shape, and the outer tapered surface 6 at the top mates and locks with the upper tapered surface of the new piston recess. This ensures that the clamping block 1 and the inverted cone recess at the top of the piston are fully aligned, thereby enhancing lifting stability and safety.

[0022] When hoisting:

[0023] 1. Hold the bolt 5 to close the clamping block 1 and place the lifting tool into the top pit of the piston. After placing it, lift the lifting tool. The support rod 3 will be lifted first and the clamping block 1 will be opened through the conical structure. After the clamping block 1 is opened and lifted, the top outer conical surface 6 will be completely in contact with the upper conical surface of the piston pit in the circumferential direction and locked under the weight of the piston, thereby achieving the purpose of lifting the piston.

[0024] 2. After the lifting is completed, hold the bolt 5 to close the clamping block 1, and take out the lifting tool to complete the lifting work. It is easy to operate and safer and more reliable to use.

[0025] A lifting ring 4 is screwed on the top of the support rod 3 to facilitate connecting the support rod 3 to an external lifting rope through the lifting ring 4.

[0026] The inside of the support rod 3 and the inside of the clamping block 1 are both provided with slots to form a hollow structure. The hollow support rod 3 and the clamping block 1 can realize a lightweight design of the piston lifting tool, making it easier to use.

[0027] Working principle:

[0028] Hold the bolt 5 to close the clamping block 1, and put the lifting tool into the top pit of the piston. After putting it in place, lift the lifting tool. The support rod 3 is lifted first and the clamping block 1 is opened through the conical structure. After the clamping block 1 is opened and lifted, the top outer conical surface 6 is completely in contact with the upper conical surface of the piston pit in the circumferential direction and locked under the weight of the piston, thereby achieving the purpose of lifting the piston;

[0029] After the hoisting is completed, the user can hold the bolt 5 to close the clamping block 1 and take out the lifting tool to complete the hoisting work. The operation is simple and the use is safer and more reliable.

[0030] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A piston lifting tool, characterized in that: The invention comprises a support rod (3), the bottom of the support rod (3) is set as a conical structure and is sleeved with a connecting block (2), the outer side of the connecting block (2) is equidistantly formed with a plurality of mounting ears, the inside of the mounting ears are provided with waist holes and are slidably connected with bolts (5), the bottom of the bolts (5) are installed with a clamping block (1), the clamping block (1) is divided into three identical parts by an overall cylindrical structure, the clamping block (1) is provided with an inner conical surface on the side close to the conical structure of the support rod (3), the clamping block (1) is slidably connected with the conical structure of the support rod (3), the outer circle of the clamping block (1) after being expanded by the conical structure of the support rod (3) is circular, the top of the clamping block (1) is provided with an outer conical surface (6) that is tightly matched with the inverted cone of the piston, and the side of the clamping block (1) close to the outer conical surface (6) is provided with a fitting part (7) that is in contact with the inner wall of the piston.

2. The piston lifting tool according to claim 1, characterized in that The top of the support rod (3) is screwed and connected with a hanging ring (4).

3. The piston lifting tool according to claim 2, characterized in that The interior of the support rod (3) and the interior of the clamping block (1) are both provided with slots to form a hollow structure.

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