Shield tunneling machine trolley traction device and shield tunneling machine

Abstract

The utility model provides a shield tunneling machine trolley traction device and a shield tunneling machine, the shield tunneling machine trolley traction device comprises two parallel traction rods, and one end of each traction rod is provided with a telescopic piece. The telescopic piece comprises a barrel, a telescopic rod and an elastic piece. The telescopic rod is arranged in the barrel and can enter and exit from the barrel in the length direction of the barrel. The elastic piece is used for promoting the telescopic rod to enter the barrel. According to the shield tunneling machine trolley traction device and the shield tunneling machine, cost can be reduced, the structure is simple, and the fault rate is low.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machines, in particular to a shield machine trolley traction device and a shield machine. Background Art

[0002] The shield machine includes a main machine, a shield machine trolley, and a trolley traction device that connects the main machine and the trolley. The trolley is a device that provides grease, power supply, water, mud and other materials for the main machine. The main function of the trolley traction device is to pull the trolley to move forward with the main machine while the main machine is digging forward.

[0003] In the prior art, the traction device of the shield machine trolley includes two traction rods, at least one of which is provided with a hydraulic cylinder. The two traction rods are arranged in parallel along the width direction of the shield machine main body, and are used to connect the shield machine main body and the shield machine trolley. When the shield machine turns a curve in the tunnel, since the length of the outer side of the curve is greater than the length of the inner side of the curve, the shield machine main body can drive the shield machine trolley to turn through the extension and contraction of the hydraulic cylinder. However, since the hydraulic cylinder is provided, a hydraulic power system matching the hydraulic cylinder needs to be provided, which leads to higher costs, more complex structures, and higher failure rates. Utility Model Content

[0004] In view of the above problems, the present invention is proposed to provide a shield machine trolley traction device and a shield machine that overcome the above problems or at least partially solve the above problems, which can not only reduce costs but also have a simple structure and a low failure rate.

[0005] Specifically, the utility model provides a shield machine trolley traction device, comprising two traction rods arranged in parallel, each of which has a retractable member at one end; the retractable member comprises:

[0006] Cylinder;

[0007] A telescopic rod is disposed in the cylinder and can enter and exit the cylinder along the length direction of the cylinder;

[0008] The elastic member is used to force the telescopic rod to enter the cylinder.

[0009] Optionally, the elastic member is a first spring; the first spring is sleeved on the outside of the telescopic rod;

[0010] A baffle is arranged at the open end of the cylinder, and the telescopic rod is located on the inner side of the baffle; a pressure plate is arranged at one end of the telescopic rod inserted into the cylinder; and two ends of the first spring abut against the baffle and the pressure plate respectively.

[0011] Optionally, the elastic member is a second spring; the second spring is located in the cylinder, and two ends of the second spring are respectively connected to the sealing end of the cylinder and one end of the telescopic rod inserted into the cylinder.

[0012] Optionally, the baffle is adjustably arranged along the length direction of the cylinder.

[0013] Optionally, the cylinder is provided with a clearance hole extending along the length direction of the cylinder; the baffle passes through the clearance hole;

[0014] The retractable member also includes:

[0015] A screw rod is arranged on the outer side of the cylinder along the length direction of the cylinder and directly opposite to the clearance through hole; one end of the baffle is movably arranged on the screw rod along the length direction of the screw rod;

[0016] Two nuts are matched with the screw rod and are located on both sides of the baffle plate, and are used to limit the movement of the baffle plate along the length direction of the screw rod.

[0017] Optionally, a first scale and a second scale are provided on the cylinder along the length direction of the screw rod;

[0018] The first scale is provided with scale values ​​for displaying the position of the baffle to display the pre-compression amount of the first spring;

[0019] The second scale is provided with scale values ​​for displaying the pre-compression force of the first spring;

[0020] Each of the pre-compression amounts corresponds to one of the pre-compression forces.

[0021] Optionally, one end of the traction rod away from the telescopic member and one end of the telescopic member away from the traction rod are both provided with double hinge structures; both ends of the double hinge structures can rotate relatively in the horizontal direction and the vertical direction.

[0022] Optionally, the double hinge structure comprises:

[0023] The first hinged structure comprises a first ear seat and a first ear plate; the first ear seat and the first ear plate are arranged to be relatively rotatable in the horizontal direction;

[0024] The second hinged structure includes a second ear seat and a second ear plate; along the vertical direction, the second ear seat and the second ear plate are relatively rotatable; the first ear plate is connected to the second ear seat.

[0025] Optionally, the traction rod has a first flange, the retractable member has a second flange, and the first flange is connected to the second flange by bolts.

[0026] The utility model also provides a shield machine, comprising a shield machine mainframe, a shield machine trolley and any one of the shield machine trolley traction devices described above; the shield machine mainframe drives the shield machine trolley to move through the shield machine trolley traction device.

[0027] In the shield machine trolley traction device of the utility model, by setting a retractable part, the shield machine can automatically adjust the length of the retractable part when turning, thereby adapting to the inner and outer displacement difference generated when turning, and realizing the turning process. Moreover, since the retractable part replaces the hydraulic cylinder, the hydraulic power system matched with the hydraulic cylinder is omitted, thus reducing the cost, and the structure of the retractable part is simple, thereby reducing the failure rate.

[0028] Furthermore, because the shield machine trolley traction device is also provided with a double-hinged structure, the shield machine can adapt to the situation where curves and ramps coexist in the tunnel.

[0029] Based on the detailed description of the specific embodiments of the present invention in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0031] Figure 1 is a schematic structural diagram of a shield machine according to an embodiment of the prior art;

[0032] Figure 2 is a schematic structural diagram of a shield machine from another perspective according to an embodiment of the prior art;

[0033] Figure 3 is based on Figure 2 A local enlarged view of point A;

[0034] Figure 4 is a schematic structural diagram of a shield machine according to an embodiment of the utility model;

[0035] Figure 5 is a schematic cross-sectional view of a retractable member according to an embodiment of the utility model;

[0036] Figure 6 is a schematic structural diagram of a retractable member according to an embodiment of the utility model;

[0037] Figure 7 is based on Figure 4 A local enlarged view of point B;

[0038] Figure 8 is based on Figure 4 A partial enlarged view of point C. DETAILED DESCRIPTION

[0039] Refer to the following Figures 4 to 8 To describe the shield machine trolley traction device and shield machine of the embodiment of the utility model. In the description of this embodiment, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or some of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0040] Unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix", "couple" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present utility model according to the specific circumstances.

[0041] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. That is, in the description of this embodiment, the first feature being "above", "above", and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below", or "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of the present embodiment, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0043] like Figure 1 and Figure 2 As shown, the shield machine includes a shield machine mainframe 200, a shield machine trolley 300, and a shield machine trolley traction device 100 connecting the shield machine mainframe 200 and the shield machine trolley 300. Among them, the shield machine trolley 300 is a device that provides materials such as grease, power supply, water, mud, etc. for the shield machine mainframe. The main function of the shield machine trolley traction device 100 is to pull the shield machine trolley 300 to move forward with the shield machine mainframe 200 during the process of the shield machine mainframe 200 digging forward.

[0044] The shield machine trolley traction device 100 usually includes two parallel traction rods 110, which are arranged along the width direction of the shield machine mainframe 200. The two ends of each traction rod 110 are respectively hinged to the shield machine mainframe 200 and the shield machine trolley 300. Specifically, the two ends of each traction rod 110 are respectively hinged to the segment assembly platform of the shield machine mainframe 200 and the shield machine trolley 300. When the shield machine is traveling in a straight line, there is no problem. However, when the shield machine turns, the outer arc length of the curve is greater than the inner arc length, and the traction rod 110 is not retractable, which will cause the outer traction rod 110 to be subjected to tension, while the inner traction rod 110 is subjected to pressure, especially when the turning radius is small, which will cause the traction rod 110 to be deformed by force, and even detached from the shield machine mainframe 200 and the shield machine trolley 300, which greatly affects the construction progress and increases the construction cost.

[0045] In order to solve the above problems, in the prior art, a hydraulic cylinder 140 is provided at one end of at least one traction rod 110. Figures 1 to 3 As shown, the hydraulic cylinder 140 and the shield machine trolley 300 are hinged by a single hinge structure 150, and the single hinge structure 150 can realize the horizontal rotation of the hydraulic cylinder 140 and the shield machine trolley 300. Specifically, the single hinge structure 150 includes an ear seat 151, an ear plate and a pin, and the ear seat 151 and the ear plate are relatively rotatable through the pin. Of course, a single hinge structure 150 is also provided at the connection between the traction rod 110 and the shield machine mainframe 200 and the shield machine trolley 300.

[0046] When the shield machine turns, the hydraulic cylinder 140 can be extended and retracted according to the force of the traction rod 110 to solve the problem of the inner and outer side displacement difference caused by horizontal turning. In this way, the traction rod 110 on the inner and outer sides is subjected to more uniform force, avoiding the traction rod 110 from being deformed or even falling off due to force.

[0047] However, since the hydraulic cylinder 140 is provided, a hydraulic power system matching the hydraulic cylinder 140 is also required, which results in a high cost and a complex structure of the shield machine. In addition, during the tunneling process of the shield machine, due to the adjustment of the posture and the influence of the on-site environment, the hydraulic cylinder 140 and the hydraulic power system may have oil leakage, valve blockage and other faults, which results in a high failure rate and high maintenance cost.

[0048] In view of the above problems, the present invention is proposed to provide a shield machine trolley traction device 100 and a shield machine that overcome the above problems or at least partially solve the above problems, which can not only reduce costs but also have a simple structure and a low failure rate.

[0049] Figure 4 Schematic diagram of a shield machine according to an embodiment of the present invention. Figure 4 As shown, and refer to Figures 5 to 8 The embodiment of the utility model provides a shield machine trolley traction device 100, including two parallel traction rods 110, and a retractable member 120 is provided at one end of each traction rod 110. The retractable member 120 includes a cylinder 121, a telescopic rod 122 and an elastic member 123. The telescopic rod 122 is arranged in the cylinder 121, and can enter and exit the cylinder 121 along the length direction of the cylinder 121. The elastic member 123 is used to promote the telescopic rod 122 to enter the cylinder 121.

[0050] In the shield machine trolley traction device 100 of the embodiment of the utility model, the shield machine mainframe 200 drives the shield machine trolley 300 to move through the shield machine trolley traction device 100. Specifically, when the shield machine is traveling in a straight line, the shield machine mainframe 200 pulls the shield machine trolley 300 forward through two traction rods 110 and two retractable parts 120, and at this time, the lengths of the traction rods 110 and the retractable parts 120 on the inner and outer sides are equal. When the shield machine turns, under the action of the shield machine mainframe 200 and the shield machine trolley 300, the telescopic rod 122 of the retractable part 120 on the outer side of the curve overcomes the action of the elastic part 123 and extends out of the cylinder 121, so that the outer retractable part 120 is extended, while the inner retractable part 120 is unchanged in length or the length of the extension is less than the length of the outer retractable part 120, so as to adapt to the inner and outer displacement difference generated when turning, and then complete the turning process. When the shield machine completes the turn, the retractable members 120 on both sides return to their original equal lengths and continue to travel in a straight line.

[0051] In this embodiment, by providing the retractable member 120, the shield machine can automatically adjust the length of the retractable member 120 when turning, thereby adapting to the inner and outer displacement difference generated when turning, and realizing the turning process. Moreover, since the retractable member 120 replaces the hydraulic cylinder 140, the hydraulic power system matched with the hydraulic cylinder 140 is omitted, thus reducing the cost, and the retractable member 120 has a simple structure, thereby reducing the failure rate.

[0052] In some embodiments of the present invention, Figure 4 and Figure 5 As shown, the elastic member 123 is a first spring. The first spring is sleeved on the outside of the telescopic rod 122. A baffle 124 is provided at the open end of the cylinder 121, and the telescopic rod 122 is located on the inner side of the baffle 124. A pressing plate 125 is provided at one end of the telescopic rod 122 inserted into the cylinder 121. The two ends of the first spring are respectively against the baffle 124 and the pressing plate 125.

[0053] In the present embodiment, the first spring is a compression spring, which is more reliable, safe, and will not break. During operation, under the elastic force of the baffle 124 and the first spring, the pressing plate 125 drives the telescopic rod 122 to move in the direction of the cylinder 121, specifically, to the sealing end of the cylinder 121, at which time the telescopic rod 122 enters the cylinder 121, and the telescopic member 120 is in a contracted state. When the telescopic rod 122 is subjected to an outward pulling force, the telescopic rod 122 drives the pressing plate 125 to move, overcomes the elastic force of the first spring, shortens the first spring, and the telescopic rod 122 extends out of the cylinder 121, and the telescopic member 120 is in a stretched state. In the present embodiment, the structure of the telescopic member 120 is simple and compact, and the axial length is short and the volume is small. For example, the baffle 124 and the pressing plate 125 in the present embodiment can both be annular plates, which are convenient for abutting against the end of the first spring.

[0054] In some alternative embodiments of the present invention, the elastic member 123 may also be a hydraulic damper or a one-way hydraulic damper.

[0055] In some embodiments of the present invention, the compression displacement of the first spring can be designed according to the minimum turning radius of the tunnel where the shield machine is located. It is known to those skilled in the art that when the turning radius of the tunnel is the smallest, the displacement difference between the inner and outer sides of the bend is the largest. Therefore, the compression displacement of the first spring can be designed according to the maximum displacement difference. In other words, when the shield machine trolley traction device 100 can meet the minimum turning radius of the shield machine to pass through the tunnel, it can also pass through other positions in the tunnel.

[0056] In other embodiments of the present invention, the elastic member 123 is a second spring. The second spring is located in the cylinder 121, and two ends of the second spring are respectively connected to the sealing end of the cylinder 121 and one end of the telescopic rod 122 inserted into the cylinder 121.

[0057] In this embodiment, the second spring can be a tension spring. When no external force is applied, the telescopic rod 122 is located in the cylinder 121, and the telescopic member 120 is in a contracted state. When the telescopic rod 122 is subjected to an outward pulling force, the telescopic rod 122 overcomes the elastic force of the second spring, so that the second spring is extended, the telescopic rod 122 extends from the cylinder 121, and the telescopic member 120 is in a stretched state. In this embodiment, the telescopic member 120 has a simple structure, is easy to design and manufacture, and has a low cost.

[0058] In some embodiments of the present invention, the baffle 124 is adjustably disposed along the length direction of the cylinder 121 .

[0059] In this embodiment, when no external force is applied, the compression amount of the first spring by the baffle 124 and the pressure plate 125 is the pre-compression amount of the first spring, and the pressure corresponding to the first spring under the pre-compression amount is the pre-compression force. The magnitude of the pre-compression force can be determined according to the traction force required by the shield machine trolley 300. Since the traction force required by shield machine trolleys 300 of different specifications is different, the pre-compression amount of the first spring can be changed by adjusting the position of the baffle 124, thereby changing the pre-compression force of the first spring.

[0060] In some embodiments of the present invention, Figure 5 As shown, a clearance hole extending along the length direction of the cylinder 121 is provided on the cylinder 121. The baffle 124 passes through the clearance hole. The telescopic member 120 also includes a screw rod 126 and two nuts 127. The screw rod 126 is arranged on the outer side of the cylinder 121 along the length direction of the cylinder 121 and is directly opposite to the clearance hole. One end of the baffle 124 is movably arranged on the screw rod 126 along the length direction of the screw rod 126. The two nuts 127 are both matched with the screw rod 126 and are located on both sides of the baffle 124 to limit the movement of the baffle 124 along the length direction of the screw rod 126.

[0061] In this embodiment, the two nuts 127 can play a role in fixing the baffle 124. By rotating the two nuts 127, the two nuts 127 are moved away from each other, the fixation of the baffle 124 is released, the position of the baffle 124 on the screw rod 126 is adjusted, and then the two nuts 127 are rotated closer to each other to achieve the fixation of the baffle 124. In this embodiment, the baffle 124 is fixed and adjusted by the cooperation of the screw rod 126 and the nut 127. Moreover, the structure of the screw rod 126 and the nut 127 is simple, which is easy to design and manufacture.

[0062] In some embodiments of the present invention, Figure 6 As shown, a first scale 128 and a second scale 129 are provided on the cylinder 121 along the length direction of the screw rod 126. The first scale 128 is provided with scale values ​​for displaying the position of the baffle 124 to display the pre-compression amount of the first spring. The second scale 129 is provided with scale values ​​for displaying the pre-compression force of the first spring. Each pre-compression amount corresponds to a pre-compression force.

[0063] In this embodiment, the pre-compression amount of the first spring can be obtained by the position of the baffle 124 on the first scale 128. The pre-compression force of the first spring can be obtained by the scale value corresponding to the pre-compression amount on the second scale value. In this embodiment, by setting the first scale 128 and the second scale 129, the pre-compression amount and pre-compression force of the first spring can be easily checked. In the actual working process, the pre-compression force of the first spring can be adjusted according to the traction force required by the shield machine trolley 300, that is, the pre-compression amount of the first spring can be adjusted, so that the adjustment is more convenient.

[0064] In some embodiments of the present invention, Figure 4 As shown, one end of the traction rod 110 away from the telescopic member 120 and one end of the telescopic member 120 away from the traction rod 110 are both provided with a double hinge structure 130. Both ends of the double hinge structure 130 can rotate relative to each other in the horizontal direction and the vertical direction.

[0065] It is known to those skilled in the art that when a shield machine is advancing in a tunnel, the tunnel has both a curve and a ramp, and there is also a situation where both a curve and a ramp exist at the same time. In the prior art, for the situation of a curve, a single hinged structure can be provided, and the two ends of the single hinged structure can rotate relative to each other in the horizontal direction to adapt to the situation of the shield machine traveling in a curve. However, for the situation of a ramp, and the situation where both a curve and a ramp exist, there is no solution.

[0066] In this embodiment, since a double hinge structure 130 is provided, and the two ends of the double hinge structure 130 can rotate relative to each other in the horizontal direction and the vertical direction at the same time, the shield machine trolley 300 and the shield machine mainframe 200 can rotate relative to each other in the horizontal direction and the vertical direction at the same time to adapt to the situation where a curve and a ramp exist in the tunnel. Of course, the two ends of the double hinge structure 130 can also rotate relative to each other only in the horizontal direction to adapt to the situation where a curve exists in the tunnel. Alternatively, the two ends of the double hinge structure 130 can rotate relative to each other only in the vertical direction to adapt to the situation where a ramp exists in the tunnel.

[0067] In some embodiments of the present invention, Figure 7 and Figure 8As shown, the double hinge structure 130 includes a first hinge structure and a second hinge structure. The first hinge structure includes a first ear seat 131 and a first ear plate. In the horizontal direction, the first ear seat 131 and the first ear plate are relatively rotatable. The second hinge structure includes a second ear seat 133 and a second ear plate 134. In the vertical direction, the second ear seat 133 and the second ear plate 134 are relatively rotatable. The first ear plate is connected to the second ear seat 133. Figure 7 As shown, a first ear seat 131 of a double hinge structure 130 is connected to the shield machine trolley 300, and a second ear plate 134 is connected to the traction rod telescopic member 120. Figure 8 As shown, the first ear seat 131 of another double hinge structure 130 is connected to the shield machine mainframe 200, and the second ear plate 134 is connected to the traction rod 110. Of course, there may be other connection modes, which will not be listed one by one.

[0068] In this embodiment, the first ear seat 131 and the first ear plate of the first hinged structure can rotate relative to each other in the horizontal direction, so that the shield machine can adapt to the situation where there is a bend in the tunnel. The second ear seat 133 and the second ear plate 134 of the second hinged structure can rotate relative to each other in the vertical direction, so that the shield machine can adapt to the situation where there is a ramp in the tunnel. The arrangement of the first hinged structure and the second hinged structure allows the shield machine to adapt to the situation where there are bends and ramps in the tunnel at the same time. Moreover, the structures of the first hinged structure and the second hinged structure are simple, easy to design and manufacture, and have low cost. The first ear plate and the second ear seat 133 can be welded and connected, and of course they can also be integrally formed.

[0069] In some embodiments of the present invention, the traction rod 110 has a first flange, the retractable member 120 has a second flange, and the first flange and the second flange are connected by bolts.

[0070] The present invention also provides a shield machine, including a shield machine mainframe 200, a shield machine trolley 300 and any one of the above shield machine trolley traction devices 100. The shield machine mainframe 200 drives the shield machine trolley 300 to move through the shield machine trolley traction device 100.

[0071] In the shield machine of the embodiment of the utility model, since the shield machine includes the shield machine trolley traction device 100, the shield machine can automatically adjust the length of the retractable part 120 when turning, thereby adapting to the inner and outer displacement difference generated when turning, and realizing the turning process. Moreover, since the retractable part 120 replaces the hydraulic cylinder 140, the hydraulic power system matched with the hydraulic cylinder 140 is omitted, thus reducing the cost, and the structure of the retractable part 120 is simple, thereby reducing the failure rate. The shield machine of the embodiment of the utility model can be a shield machine of small and medium diameter, or a shield machine of large diameter.

[0072] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the contents disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. A shield machine trolley traction device, comprising two parallel traction rods, characterized in that: A retractable member is provided at one end of each traction rod; the retractable member comprises: Cylinder; A telescopic rod is disposed in the cylinder and can enter and exit the cylinder along the length direction of the cylinder; The elastic member is used to force the telescopic rod to enter the cylinder.

2. The shield machine trolley traction device according to claim 1, characterized in that: The elastic member is a first spring; the first spring is sleeved on the outside of the telescopic rod; A baffle is arranged at the open end of the cylinder, and the telescopic rod is located on the inner side of the baffle; a pressure plate is arranged at one end of the telescopic rod inserted into the cylinder; and two ends of the first spring abut against the baffle and the pressure plate respectively.

3. The shield machine trolley traction device according to claim 1, characterized in that: The elastic member is a second spring; the second spring is located in the cylinder, and two ends of the second spring are respectively connected to the sealing end of the cylinder and one end of the telescopic rod inserted into the cylinder.

4. The shield machine trolley traction device according to claim 2, characterized in that: The baffle is adjustably arranged along the length direction of the cylinder.

5. The shield machine trolley traction device according to claim 4, characterized in that: The cylinder is provided with a clearance hole extending along the length direction of the cylinder; the baffle passes through the clearance hole; The retractable member also includes: A screw rod is arranged on the outer side of the cylinder along the length direction of the cylinder and directly opposite to the clearance through hole; one end of the baffle is movably arranged on the screw rod along the length direction of the screw rod; Two nuts are matched with the screw rod and are located on both sides of the baffle plate, and are used to limit the movement of the baffle plate along the length direction of the screw rod.

6. The shield machine trolley traction device according to claim 5, characterized in that: A first scale and a second scale are provided on the cylinder along the length direction of the screw rod; The first scale is provided with scale values ​​for displaying the position of the baffle to display the pre-compression amount of the first spring; The second scale is provided with scale values ​​for displaying the pre-compression force of the first spring; Each of the pre-compression amounts corresponds to one of the pre-compression forces.

7. The shield machine trolley traction device according to claim 1, characterized in that: One end of the traction rod away from the telescopic member and one end of the telescopic member away from the traction rod are both provided with double hinge structures; both ends of the double hinge structures can rotate relatively in the horizontal direction and the vertical direction.

8. The shield machine trolley traction device according to claim 7, characterized in that: The double hinge structure comprises: The first hinged structure comprises a first ear seat and a first ear plate; the first ear seat and the first ear plate are arranged to be relatively rotatable in the horizontal direction; The second hinged structure includes a second ear seat and a second ear plate; along the vertical direction, the second ear seat and the second ear plate are relatively rotatable; the first ear plate is connected to the second ear seat.

9. The shield machine trolley traction device according to claim 1, characterized in that: The traction rod has a first flange, the telescopic member has a second flange, and the first flange is connected to the second flange by bolts.

10. A shield machine, comprising a shield machine mainframe and a shield machine trolley, characterized in that: It also includes the shield machine trolley traction device described in any one of claims 1 to 9; the shield machine main engine drives the shield machine trolley to move through the shield machine trolley traction device.

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