Lifting appliance for clamping shield disc type hob

Abstract

The utility model discloses a lifting appliance for clamping a shield disk hob, which comprises clamping arms, a main pin shaft, a limiting block, a lifting block, a tension spring, a connecting rod, a pin shaft and a lifting nose, the upper ends of the four clamping arms are connected through the main pin shaft, and the tail ends of the clamping arms are connected with the lifting block through the pin shaft; and a lifting nose is arranged in the middle of the main pin shaft. A four-arm and one-shaft mechanism is adopted for connection, simultaneous linkage of four arms is guaranteed through shaft connection, stable and reliable lifting is guaranteed through the lifting blocks at the tail ends of the clamping arms, the working efficiency and the use safety are improved, and the clamping device is suitable for clamping and lifting disc type workpieces and parts such as disc type hobs.

Description

Technical Field

[0001] This utility model relates to a lifting device for clamping shield disc cutterheads, used for transporting and lifting cutterheads of tunnel boring machines, and belongs to the field of tunnel boring machine technology. Background Technology

[0002] With the increasing use of tunnel boring machines, the consumption of cutterheads in hard rock excavation is very high. In actual working conditions, the cutterheads replaced are pre-assembled. The cutterhead assembly mainly consists of a cutter ring, bearings, and a mandrel. During the assembly of disc cutterheads, multiple handling operations are required when assembling them with bearings and mandrels. Due to their large size and weight, manual handling is inconvenient and unsafe, necessitating specialized clamping and lifting equipment. Commonly used lifting slings, wire ropes, and lifting lugs on site suffer from problems such as unstable clamping and imbalance during transport. Unreliable clamping inevitably leads to safety hazards. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a lifting device for clamping shield disc cutters, which addresses the shortcomings of the existing technology.

[0004] To solve this technical problem, this utility model provides a lifting device for clamping shield tunnel disc cutters, including clamping arms, main pins, limiting blocks, lifting blocks, tension springs, connecting rods, pins and lifting noses. The upper ends of the four clamping arms are connected by the main pins, and the ends of the clamping arms are connected to the lifting blocks by the pins. The main pins are provided with lifting noses in the middle.

[0005] The clamping arm is provided with a limiting block at its end. The clamping arm and the limiting block are fixedly connected as one unit and are used to support the hobbing cutter ring of the disc-shaped cutter head.

[0006] A tension spring is provided between the lifting block and the clamping arm, and the lifting block opens outward under the tension of the tension spring.

[0007] Two clamping arms are provided at each end of the main pin shaft. The two clamping arms on the inner side and the two clamping arms on the outer side are connected together by a connecting rod. The two sets of clamping arms can open and close to both sides with the main pin shaft as the central axis, forming an opening and closing angle α, which makes the distance between the lifting blocks at the end of the clamping arms slightly larger than the outer diameter of the hobbing cutter ring.

[0008] The position where the lifting block contacts the cutter ring is equipped with a rubber pad to prevent slippage.

[0009] The clamping arm forms an opening angle α = 60° when clamping.

[0010] The beneficial effects of this invention are as follows:

[0011] 1. Improve work efficiency: The lifting tool of this utility model can quickly and stably clamp the disc cutter, lift and transport it, avoid manual handling, and shorten the operation time;

[0012] 2. Enhanced safety: The optimized design of this utility model lifting tool is applicable to disc-shaped workpieces and components such as disc hobs. The standardized design makes the structural layout uniform, making it safer and more reliable.

[0013] 3. Good adaptability: The opening angle α can be adjusted according to the size of the disc hob, and it is suitable for clamping and lifting disc hobs from 6 inches to 20 inches. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the clamping mechanism of this utility model;

[0015] Figure 2 This is a schematic front view of the structure of this utility model;

[0016] Figure 3 This is a top view illustrating the structure of this utility model;

[0017] Figure 4 This is a partial enlarged view of the lower end of the clamping arm of this utility model;

[0018] Figure 5 This is a schematic diagram of the clamping disc hob of this utility model.

[0019] In the diagram: 1. Hob cutter ring; 2. Clamping arm; 3. Main pin; 4. Limit block; 5. Lifting block; 6. Tension spring; 7. Connecting rod; 8. Pin; 9. Lifting lug. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] like Figures 1-5 As shown, this utility model provides a lifting device for clamping shield tunneling disc cutterheads, including four clamping arms 2, a main pin 3, a limiting block 4, a lifting block 5, a tension spring 6, a connecting rod 7, a pin 8, and a lifting nose 9. The upper ends of the four clamping arms 2 are connected by the main pin 3, and each pair of clamping arms 2 is located at both ends of the main pin 3. The ends of the clamping arms 2 are connected to the lifting block 5 by the pin 8. The four clamping arms 2 form a cover shape in the working state; the lifting nose 9 is provided in the middle of the main pin 3.

[0022] The clamping arm 2 is provided with a limiting block 4 at its end. The clamping arm 2 and the limiting block 4 are fixedly connected as one unit. When clamping, the limiting block 4 limits the lifting block 5 and is used to lift the hobbing cutter ring 1 of the disc cutter head.

[0023] A tension spring 6 is provided between the lifting block 5 and the clamping arm 2, and the lifting block 5 opens outward under the tension of the tension spring 6.

[0024] Two clamping arms 2 are provided at both ends of the main pin 3. The two clamping arms 2 located on the inner side and the two clamping arms 2 located on the outer side are connected together by connecting rods 7. The clamping arms 2 have a corner at the end near the main pin 3 to avoid deformation. The two sets of clamping arms 2 can open and close to both sides with the main pin 3 as the central axis, forming an opening and closing angle α, which makes the distance between the lifting blocks 5 at the end of the clamping arms 2 slightly larger than the outer diameter of the hobbing cutter ring 1.

[0025] The position where the lifting block 5 contacts the roller cutter ring 1 is provided with a rubber pad to prevent slippage.

[0026] The clamping arms 2 form an opening angle α = 60° when clamping, meaning that when clamping, the lengths of the two clamping arms 2 and the distance between the two clamping points of the hobbing cutter ring 1 form an approximately equilateral triangle.

[0027] When using this invention to clamp and lift a disc cutter, the clamping arms, which are distributed on both sides with the main shaft pin as the central axis, form a certain opening angle, resulting in the distance between the lifting blocks at the ends of the clamping arms being slightly larger than the cutter ring. Hold the lifting nose by hand or with a tool, and place the lifting device downwards from above the cutter. The weight of the lifting device and the size of the cutter ring will cause the lifting device to open. After the cutter enters a certain position inside the lifting device, the lifting blocks will open outwards under the tension of the tension spring, and the lower part of the lifting blocks will be placed above the limiting block. At this time, lift the lifting nose, and the disc cutter will be supported by the cooperation of the lifting blocks and the limiting blocks.

[0028] In practical applications, the pin may deform, corrode, or rust over time, causing the lifting block to fail to detach on its own. The tension spring ensures the lifting block functions properly. In addition, a rubber pad is added at the point where the lifting block contacts the cutter to prevent slippage.

[0029] This utility model adopts a four-arm, one-axis mechanism for connection. The shaft connection ensures that the four arms move in unison. The lifting block at the end of the clamping arm ensures stable and reliable lifting, improving work efficiency and safety. It is suitable for clamping and lifting disc-shaped workpieces and components such as disc hobs.

[0030] The above-described embodiments of this utility model are merely illustrative examples and are not the only ones. All modifications within the scope of this utility model or equivalent to this utility model are encompassed by this utility model.

Claims

1. A spreader for clamping a shield disc type cutter, characterized in that: It includes clamping arm (2), king pin (3), limit block (4), lifting block (5), tension spring (6), connecting rod (7), pin (8) and lifting nose (9), the upper end of four clamping arms (2) is connected through king pin (3), the end of clamping arm (2) is connected with lifting block (5) through pin (8);The middle of king pin (3) is provided with lifting nose (9).

2. The spreader for clamping a disc-type cutter according to claim 1, characterized in that: The end of clamping arm (2) is provided with limit block (4), clamping arm (2) and limit block (4) are fixedly connected as a whole, which is used for lifting the hob ring (1) of disc cutter.

3. The hanger for gripping a shield disc type cutter according to claim 1, characterized in that: Tension spring (6) is arranged between lifting block (5) and clamping arm (2), and lifting block (5) is opened outward by the tension of tension spring (6).

4. The hanger for gripping a shield disc type cutter according to claim 1, characterized in that: Two clamping arms (2) are arranged at the both ends of king pin (3), the two clamping arms (2) on the inner side and the two clamping arms (2) on the outer side are connected together through connecting rod (7), two groups of clamping arms (2) can be opened and closed to both sides with king pin (3) as the center axis, forming opening angle α, so that the distance between lifting blocks (5) at the end of clamping arm (2) is slightly larger than the outer diameter of hob ring (1).

5. The hanger for gripping a shield disc type cutter according to claim 1, characterized in that: The position of lifting block (5) contacting with hob ring (1) is provided with rubber pad, which plays the role of anti-skid.

6. The spreader for clamping a disc-type cutter according to any one of claims 1 to 5, characterized in that: The opening angle α formed by clamping arm (2) when clamping is 60°.

Images