Shield tunneling machine hob starting torque measuring jig

Abstract

The utility model provides a tool for measuring the starting torque of a hob of a shield tunneling machine in the field of tunneling machines. Comprising a chain clamp and a pin, the chain clamp comprises a chain and a chain wrench, the chain is used for hooping the cutter ring, and the chain is limited and fixed through a jaw at the front end of the chain wrench; the pin is arranged at the front end of the chain wrench and is parallel to a hob shaft of the hob, and the torque measuring instrument is in insertion fit with the pin to form detachable connection and is used for measuring the starting torque of the hob. The torque measuring instrument is a dial plate type manual torque wrench. The chain clamp is assembled on the hob ring, the chain clamp can hoop and fasten the hob ring, the length of the chain can be adjusted, the chain is not limited by the shape and the structure type of the hob ring of the hob, and the universality is good; the pin is arranged on the chain clamp, the dial plate type manual torque wrench can be connected with the pin in an inserted mode, the dial plate type manual torque wrench is rotated, when the hob ring rotates, the starting torque of the hob is displayed on the dial plate type manual torque wrench, and the technical problem of hob starting torque measurement in the prior art is effectively solved.

Description

Technical Field

[0001] The utility model relates to roller cutter measurement in the field of tunnel boring machines, in particular to a roller cutter starting torque measurement jig for shield machines. Background Art

[0002] The excavation process of the shield machine is the cutting process of the tool breaking the rock. The torque of the roller is an important parameter in cutting. The force that makes the roller rotate is provided by the friction between the roller blade and the rock surface to be cut during the rotation of the cutterhead. Therefore, the necessary condition for breaking the rock is that the roller has a certain pressure on the rock formation, and when the cutterhead rotates, the friction torque generated by the roller is sufficient to make the roller rotate.

[0003] The main reason for the damage of the cutter bearing and the eccentric wear of the cutter in the tunnel boring machine is the size of the cutter starting torque. The starting torque varies greatly under different geological conditions. The torque of the shield cutter directly affects the use of the cutter. If the starting torque is too large, the cutter is prone to eccentric wear. If the starting torque is too small, the cutter bearing is prone to fall apart. Therefore, the starting torque of the shield cutter is tested before leaving the factory.

[0004] However, the inventors of this application found that the above technology has at least the following technical problems in the process of implementing the technical solution of the invention in the embodiment of this application:

[0005] During the assembly process and daily maintenance of disc cutters, in addition to the appearance size and air tightness, there is another very important test item, which is the starting torque of the cutter. The traditional device for measuring the starting torque is limited by the size of the cutter body and the cutter ring, and each cutter model needs to be equipped with a measuring device. However, the cutter ring of shield cutters has many shapes and structures, resulting in the device's low versatility. The drive wheel needs to be replaced frequently according to the different cutter rings, which is inconvenient to use and has low production efficiency.

[0006] At present, the starting torque detection of shield cutter mainly relies on simple tooling and torque wrenches. When in use, the cutter shaft is fixed, and the nut is clamped and rotated with a dial-type manual torque wrench. The detection is performed by manually twisting the torque wrench. It has a low degree of automation, slow production efficiency, high labor intensity for employees, and a great influence of personnel on the test results. Summary of the invention

[0007] In order to solve the shortcomings of the prior art, the utility model provides a shield machine cutter start-up torque measuring fixture for the problem that the cutter ring shape and structure type limit the start-up torque measurement of the cutter. The cutter ring of the cutter is clamped by a chain and a chain clamp, which is not limited by the cutter ring shape and structure type, improves the versatility of measuring the cutter, and solves the technical problem of measuring the start-up torque of the cutter.

[0008] The solution adopted by the utility model to solve the technical problem is:

[0009] A shield machine cutter starting torque measuring fixture comprises a chain clamp and a pin; the chain clamp comprises a chain and a chain wrench, the chain is used to hoop the cutter ring of the cutter, and the chain is fixed by the jaws of the front end of the chain wrench; the pin is arranged at the front end of the chain wrench and is parallel to the cutter shaft of the cutter, and a torque measuring instrument is plugged into and matched with the pin to form a detachable connection, which is used to measure the starting torque of the cutter.

[0010] In order to further solve the technical problem to be solved by the utility model, in the torque measuring instrument provided by the utility model, the torque measuring instrument is a dial-type manual torque wrench.

[0011] Furthermore, the pin is made of 30Cr material.

[0012] Furthermore, the pin and the chain spanner are formed into one body through threaded connection.

[0013] Positive effects: The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages:

[0014] 1. Since the embodiment of the present application adopts a chain clamp assembled on the cutter ring, the chain clamp can tighten the cutter ring hoop, and the length of the chain is adjustable, and thus is not limited by the cutter ring shape and structure type of the hob, so the fixture has good versatility;

[0015] 2. Since the embodiment of the present application adopts the technical means of setting a pin on the chain pliers, and the pin corresponds to the clamping sleeve hole of the dial-type manual torque wrench; the dial-type manual torque wrench and the pin can be plugged in, and the dial-type manual torque wrench is rotated. When the cutter ring rotates, the starting torque of the hob is displayed on the dial-type manual torque wrench, which effectively solves the technical problem of measuring the starting torque of the hob in the prior art.

[0016] The utility model is suitable for use as a measuring fixture for the starting torque of the cutter of a shield machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0019] Figure 2 This is a top view of this embodiment.

[0020] In the figure, 1. knife ring, 2. chain pliers, 21. chain, 22. chain wrench, 3. pin, 4. knife shaft. DETAILED DESCRIPTION

[0021] 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. Although the embodiments of the utility model have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the attached claims and their equivalents. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the utility model.

[0022] The embodiment of the present application provides a shield machine cutter starting torque measuring jig, which solves the problem in the prior art that the cutter starting torque measurement is easily limited by the cutter ring shape and structure type. In the cutter starting torque measuring jig, a chain and a chain clamp are used to clamp the cutter ring of the cutter, which is not limited by the cutter ring shape and structure type, thereby improving the versatility of measuring the cutter.

[0023] As shown in the figure, a shield machine cutter starting torque measuring fixture includes a chain clamp 2 and a pin 3;

[0024] The chain pliers 2 include a chain 21 and a chain spanner 22. The chain 21 is used for the cutter ring 1 of the hoop cutter. The length of the chain 21 is adjustable, and it is suitable for different cutter ring shapes and structural types. The chain 21 is fixed by the jaws at the front end of the chain spanner 22.

[0025] The pin 3 is arranged at the front end of the chain wrench 22 and is parallel to the cutter shaft 4 of the hob. The torque measuring instrument is plugged into and matched with the pin 3 to form a detachable connection for measuring the starting torque of the hob.

[0026] In order to ensure the stability of the structure of this embodiment, the torque measuring instrument is a dial-type manual torque wrench.

[0027] In order to further ensure the stability of the structure of this embodiment, the pin 3 is a square, a regular hexagon, a regular octagon, a regular dodecagon or a regular icosagon, and corresponds to the clamping sleeve hole of the dial-type manual torque wrench;

[0028] Preferably, the pin 3 is an external tooth formed by a combination of a regular octagon and a regular icosagon, the regular octagon and the regular icosagon are concentric with each other and staggered by 30°, and match the clamping sleeve hole of the dial-type manual torque wrench.

[0029] In order to optimize the structure of this embodiment, the pin 3 is made of 30Cr material.

[0030] As a conventional technical option, the pin 3 and the chain wrench 22 are formed into one piece by screw connection.

[0031] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0032] 1. Since the chain clamp 2 is assembled on the cutter ring 1, the chain clamp 2 can tighten the cutter ring 1, and the length of the chain 21 is adjustable, so it is not limited by the cutter ring shape and structure type of the hob, and has good versatility;

[0033] 2. Since the chain pliers 2 are provided with a pin 3, the pin 3 corresponds to the clamping sleeve hole of the dial-type manual torque wrench; therefore, the dial-type manual torque wrench is plugged into the pin 3, and the dial-type manual torque wrench is rotated. When the cutter ring 1 rotates, the starting torque of the hob is displayed on the dial-type manual torque wrench, thereby solving the technical problem of measuring the starting torque of the hob.

[0034] The working process of this embodiment:

[0035] When in use, first fix the cutter shaft 4 of the hob; then use the chain pliers 2 to clamp the cutter ring 1, and after the chain 21 is wrapped around the cutter ring 1, the chain 21 clamps the cutter ring 1; finally, insert the pin 3 into the dial-type manual torque wrench and clamp the pin 3, and rotate the dial-type manual torque wrench with force. When the cutter ring 1 rotates, the torque displayed on the dial-type manual torque wrench is the starting torque of the hob.

[0036] In this embodiment, the starting torque of the hob is in the range of 50 N·m to 75 N·m.

[0037] It is worth noting that the contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of the chain pliers 2 and the dial-type manual torque wrench are not specifically limited, and conventional technical selection can be used. In this technical solution, the hob structure not mentioned belongs to the prior art, so it is not shown in the figure and will not be described here.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A shield machine cutter start-up torque measurement fixture, characterized by: It comprises a chain clamp (2) and a pin (3); The chain pliers (2) comprise a chain (21) and a chain spanner (22); the chain (21) is used for the cutter ring (1) of the hoop cutter, and the chain (21) is limited and fixed by the jaws at the front end of the chain spanner (22); The pin (3) is arranged at the front end of the chain wrench (22) and is parallel to the cutter shaft (4) of the roller cutter. The torque measuring instrument and the pin (3) are plugged into each other to form a detachable connection, and are used to measure the starting torque of the roller cutter.

2. A shield machine cutter starting torque measuring fixture according to claim 1, characterized in that: The torque measuring instrument is a dial-type manual torque wrench.

3. The shield machine cutter starting torque measuring fixture according to claim 1 is characterized by: The pin (3) is made of 30Cr material.

4. The shield machine cutter starting torque measuring fixture according to claim 1 is characterized by: The pin (3) and the chain spanner (22) are integrally formed by threaded connection.

5. The shield machine cutter starting torque measuring fixture according to claim 1 is characterized by: The pin (3) is in the shape of a square, a regular hexagon, a regular octagon, a regular dodecagon or a regular icosagon, and corresponds to the clamping sleeve hole of the dial-type manual torque wrench.

6. The shield machine cutter starting torque measuring fixture according to claim 1 is characterized by: The pin (3) is an external tooth formed by a combination of a regular octagon and a regular 24-gon, the regular octagon and the regular 24-gon are concentrically offset by 30° and match the clamping sleeve hole of the dial-type manual torque wrench.

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