A chassis tensioning device

Abstract

A chassis tensioning device includes a tensioning part, a tensioning rod, a connecting block, and an adjusting part; the tensioning part includes a cylinder body, a connecting rod, a first spring, a second spring, a sliding sleeve, a first slip ring, a second slip ring, a stop part, and a top plate; the adjusting part includes a connecting frame, a connecting plate, a connecting column, a bushing, and a sleeve ring; an oil passage is provided in the cylinder body; the cylinder body includes a first cylinder and a second cylinder, which are connected by a stop part; one end of the connecting rod extends into the second cylinder, and the other end of the connecting rod is connected to one end of the connecting frame by a fastener; the length of the first cylinder is equal to the length of the second cylinder, the diameter of the second cylinder is smaller than the diameter of the first cylinder, and one end of the first spring is sleeved on the outer circumference of the first cylinder.

Description

Technical Field

[0001] This invention relates to the field of tunneling machinery, and more specifically to a chassis tensioning device. Background Technology

[0002] With the continuous expansion of urbanization and infrastructure construction, the market demand for tunnel boring machines (TBMs) is gradually increasing. As underground construction expands, the requirements for the functionality, efficiency, and safety of TBMs are becoming increasingly stringent. Over the years, the domestic TBM industry has shown a strong development momentum, with both import and domestic production rates increasing. Currently, my country's TBM market is expanding, its technological level is gradually improving, and it has formed a relatively complete industrial chain and cluster. The competitiveness of domestically produced TBMs in both domestic and international markets is also continuously strengthening.

[0003] Tunnel boring machines (TBMs) consist of a robotic arm, body, and chassis. The chassis typically includes tracks, wheels, and track tensioning devices. The technological advancements in TBMs focus on their excavation methods, geological collapse risk assessment, and maintaining the stability of excavated areas. This involves upgrading traditional manual operation to unmanned and intelligent operation, aiming to comprehensively improve the efficiency and safety of TBMs. In practical engineering, the following problems exist:

[0004] I. Existing chassis tensioning devices commonly employ mechanisms such as hydraulics, springs, and screws to achieve tension. Springs are a common component widely used in various tensioning devices. However, due to the harsh travel and operating environment of tunneling machines, significant vibrations occur, leading to increased vibration of lightweight components like springs and consequently, increased wear between the springs and the supporting column.

[0005] Second, in the existing technology, when a spring is subjected to vibration, the middle position is the position with the largest vibration amplitude. How to reduce the vibration amplitude is a problem that needs to be solved.

[0006] Third, in practical work, based on stability considerations, the adjustment range of the hydraulic tensioning device will not be too large; when the hydraulic extension and retraction occur, the extension and retraction of the spring also need to be limited.

[0007] IV. Existing chassis tensioning devices commonly include hydraulic tensioning devices. In hydraulic tensioning devices, tensioning is achieved solely by relying on hydraulic cylinders, which is reflected in the extension and retraction of hydraulic cylinders in terms of structure. However, hydraulic extension and retraction are inevitably less stable than fixed mechanisms, especially in the harsh travel and operation environment of tunneling machines, where a stable adjustment mechanism is even more necessary.

[0008] Fifth, the existing adjustment mechanisms have installation interference problems that need to be solved. Summary of the Invention

[0009] To overcome the above problems, the present invention proposes a solution that addresses multiple problems simultaneously.

[0010] The technical solution adopted by the present invention to solve its technical problem is: a chassis tensioning device, comprising a tensioning part, a tensioning rod, a connecting block, and an adjusting part; the tensioning part includes a cylinder body, a connecting rod, a first spring, a second spring, a sliding sleeve, a first slip ring, a second slip ring, a stop part, and a top plate; the adjusting part includes a connecting frame, a connecting plate, a connecting column, a bushing, and a sleeve ring; an oil passage is provided in the cylinder body;

[0011] The cylinder body includes a first cylinder and a second cylinder, which are connected by a stop. One end of a connecting rod extends into the second cylinder, and the other end of the connecting rod is connected to one end of the connecting frame via a fastener. The length of the first cylinder is equal to the length of the second cylinder, and the diameter of the second cylinder is smaller than the diameter of the first cylinder. One end of a first spring is fitted onto the outer circumference of the first cylinder and connected to the top plate. The top plate is connected to the outer wall of the first cylinder. The outer wall of the second cylinder is fitted with the sliding sleeve, and the two ends of the sliding sleeve are respectively connected to a first slip ring and a second slip ring. The outer diameter of the first slip ring is equal to the outer diameter of the second slip ring and smaller than the outer diameter of the sliding sleeve. The second slip ring includes an inclined surface that is adapted to the surface shape of the stop. The other end of the first spring is fitted onto the outer circumference of the second slip ring and connected to the sliding sleeve. One end of the second spring is fitted onto the outer circumference of the first slip ring and connected to the sliding sleeve, and the other end of the second spring is connected to the connecting frame. In its natural state, the length of the first spring is greater than the length of the second spring.

[0012] The other end of the connecting frame is connected to two connecting plates, one upper and one lower. An clearance space is formed inside the connecting frame. One end of the tensioning rod can extend into the clearance space. The bushing is fitted around the outer periphery of the tensioning rod. The bushing includes eight outer surfaces. Each of the upper and lower surfaces of the bushing is provided with a connecting post to connect the upper and lower connecting plates. A first hole is provided on the tensioning rod, and a second hole is provided on the side surface of the bushing. A transition surface is provided between the upper surface and the side surface of the bushing. A connecting ring is provided around the fastener within the clearance space. One end of the tensioning rod, after extending into the clearance space, can extend into the connecting ring for positioning. The other end of the tensioning rod is connected to the connecting block.

[0013] Preferably, the number of the first holes is several.

[0014] Preferably, the number of the second holes is several.

[0015] Preferably, a third hole is provided on the transition surface.

[0016] Preferably, the tensioning rod is provided with a fourth hole that mates with the third hole.

[0017] Preferably, the connecting frame includes a main body, an outer edge, and ribs.

[0018] Preferably, the clearance space is formed inside the main body, and the opening of the main body extends outward to form an outer edge.

[0019] Preferably, the ribs are disposed on the outer wall of the main body.

[0020] Preferably, the upper and lower connecting plates are connected to the outer edge.

[0021] Preferably, the sliding sleeve, the first slip ring, and the second slip ring are movable along the second cylinder.

[0022] The beneficial effects of this invention are:

[0023] The first point of the invention addresses the background technology by changing the existing structure where the spring is sleeved on the hydraulic cylinder to a structure where the hydraulic cylinder is divided into two cylinders of equal length but different diameters. The larger cylinder is sleeved on one end of the spring, while the spring in the smaller cylinder is suspended. This results in a large section of the spring assembly with the largest amplitude being suspended, preventing it from colliding and wearing with the hydraulic cylinder.

[0024] The second point of the invention addresses the background technology. Since the small cylinder section corresponds to the section with the largest amplitude in the middle of the spring assembly, the single spring is replaced with two springs. A sliding sleeve is connected between the two springs, and a slip ring is connected to each side of the sliding sleeve. The slip rings are nested at the ends of the two springs to provide support, thus forming an integral spring assembly with small amplitude, sufficient elasticity, and avoidance of wear caused by vibration.

[0025] The third point of the invention addresses the background technology by employing a spring on the left side of the sliding sleeve that is shorter than the spring on the right side. This allows the left spring to provide greater rigidity for left-side limiting, while the right spring is longer. A transition section with a ramp is provided between the two cylinders, and the right-side slip ring also has a ramp. These two ramps work together to achieve right-side limiting and stopping. Thus, two different methods are used for left and right limiting, restricting both the travel of the sliding sleeve and slip ring, as well as the travel of the spring.

[0026] Fourthly, addressing the fourth point raised in the background art, an adjustable solid connection structure is provided at the connection between the hydraulic tensioning part and the tensioning rod. Specifically, a bushing is provided outside the tensioning rod, and a mating block is connected to the bushing. The mating block is connected to the connecting frame. Connections at different positions are achieved through the mating of a series of connecting holes, thereby adjusting the connection length and enhancing adaptability. Furthermore, the connecting frame has an internal clearance space for the tensioning rod to extend forward. A sleeve ring is provided around the fastener within the clearance space, facilitating both the positioning and limiting of the tensioning rod, and the installation and positioning of the fastener.

[0027] Fifthly, in response to the fifth point of the prior art, the bushing is configured with an internal circular hole to accommodate the tensioning rod, and an octahedral outer surface. The upper and lower surfaces are connected to connecting columns, which in turn connect to a connecting frame. The planes of the upper and lower surfaces of the octahedron facilitate the installation and manufacturing of the connecting columns. The left and right surfaces of the bushing are connected to the tensioning rod through a series of connecting holes, and the planes of the left and right surfaces of the octahedron are suitable for connection to the end planes of fasteners. This avoids interference between the two sets of connecting structures. Optionally, the four beveled surfaces of the outer surface of the bushing can also be connected to the tensioning rod through holes. Finally, the position of the tensioning rod is adjusted by the staggered positions of the series of connecting holes. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Figure 1 This is a schematic diagram of the overall chassis running system of the present invention.

[0030] Figure 2 This is a structural diagram of the tensioning part of the tensioning device of the present invention.

[0031] Figure 3 This is a structural diagram of the adjustable part of the tensioning device of the present invention.

[0032] Figure 4 This is a three-dimensional diagram of the tensioning rod of the present invention.

[0033] Figure 5 This is a three-dimensional view of the bushing of the present invention.

[0034] The reference numerals in the figure are as follows:

[0035] 1. Sprocket; 2. Guide wheel; 3. Drive shaft; 4. Guide shaft; 5. Chassis frame; 6. Upper plate; 7. Lower plate; 8. Vertical plate; 9. Guide wheel; 10. Support wheel; 11. Track; 12. Tensioning part; 13. Tensioning rod; 14. Connecting block; 15. Bolt; 16. First cylinder; 17. Second cylinder; 18. Connecting rod; 19. Connecting frame; 20. First spring; 21. Second spring; 22. Oil passage; 23. Sliding sleeve; 24. First slip ring; 25. Second slip ring; 26. Inclined surface; 27. Stop part; 28. Connecting plate; 29. ​​Connecting column; 30. Bushing; 31. First hole; 32. First surface; 33. Second surface; 34. Shaft hole; 35. Transition surface; 36. Second hole; 37. Top plate; 38. Clearance space; 39. Loop ring; 40. Fastener. Detailed Implementation

[0036] As shown in the figure: A chassis tensioning device includes a tensioning part, a tensioning rod, a connecting block, and an adjusting part; the tensioning part includes a cylinder body, a connecting rod, a first spring, a second spring, a sliding sleeve, a first slip ring, a second slip ring, a stop part, and a top plate; the adjusting part includes a connecting frame, a connecting plate, a connecting column, a bushing, and a sleeve ring; an oil passage is provided in the cylinder body;

[0037] The cylinder body includes a first cylinder and a second cylinder, which are connected by a stop. One end of a connecting rod extends into the second cylinder, and the other end of the connecting rod is connected to one end of the connecting frame via a fastener. The length of the first cylinder is equal to the length of the second cylinder, and the diameter of the second cylinder is smaller than the diameter of the first cylinder. One end of a first spring is fitted onto the outer circumference of the first cylinder and connected to the top plate. The top plate is connected to the outer wall of the first cylinder. The outer wall of the second cylinder is fitted with the sliding sleeve, and the two ends of the sliding sleeve are respectively connected to a first slip ring and a second slip ring. The outer diameter of the first slip ring is equal to the outer diameter of the second slip ring and smaller than the outer diameter of the sliding sleeve. The second slip ring includes an inclined surface that is adapted to the surface shape of the stop. The other end of the first spring is fitted onto the outer circumference of the second slip ring and connected to the sliding sleeve. One end of the second spring is fitted onto the outer circumference of the first slip ring and connected to the sliding sleeve, and the other end of the second spring is connected to the connecting frame. In its natural state, the length of the first spring is greater than the length of the second spring.

[0038] The other end of the connecting frame is connected to two connecting plates, one upper and one lower. An clearance space is formed inside the connecting frame. One end of the tensioning rod can extend into the clearance space. The bushing is fitted around the outer periphery of the tensioning rod. The bushing includes eight outer surfaces. Each of the upper and lower surfaces of the bushing is provided with a connecting post to connect the upper and lower connecting plates. A first hole is provided on the tensioning rod, and a second hole is provided on the side surface of the bushing. A transition surface is provided between the upper surface and the side surface of the bushing. A connecting ring is provided around the fastener within the clearance space. One end of the tensioning rod, after extending into the clearance space, can extend into the connecting ring for positioning. The other end of the tensioning rod is connected to the connecting block.

[0039] As shown in the figure: the number of first holes is several. The number of second holes is several. A third hole is provided on the transition surface. A fourth hole is provided on the tensioning rod to mate with the third hole. The connecting frame includes a main body, an outer edge, and ribs. The clearance space is formed inside the main body, and the opening of the main body extends outward to form the outer edge. The ribs are provided on the outer wall of the main body. Upper and lower connecting plates are connected to the outer edge. The sliding sleeve, the first slip ring, and the second slip ring can move along the second cylinder.

[0040] The above detailed description is a specific description of feasible embodiments of the present invention. These embodiments are not intended to limit the patent scope of the present invention. All equivalent implementations or modifications that do not depart from the present invention should be included in the patent scope of this case.

Claims

1. A chassis tensioning device, characterized in that: It includes a tensioning part, a tensioning rod, a connecting block, and an adjusting part; the tensioning part includes a cylinder body, a connecting rod, a first spring, a second spring, a sliding sleeve, a first slip ring, a second slip ring, a stop part, and a top plate; the adjusting part includes a connecting frame, a connecting plate, a connecting column, a bushing, and a sleeve ring; the cylinder body is provided with an oil passage; The cylinder body includes a first cylinder and a second cylinder, which are connected by a stop. One end of a connecting rod extends into the second cylinder, and the other end of the connecting rod is connected to one end of the connecting frame via a fastener. The length of the first cylinder is equal to the length of the second cylinder, and the diameter of the second cylinder is smaller than the diameter of the first cylinder. One end of a first spring is fitted onto the outer circumference of the first cylinder and connected to the top plate. The top plate is connected to the outer wall of the first cylinder. The outer wall of the second cylinder is fitted with the sliding sleeve, and the two ends of the sliding sleeve are respectively connected to a first slip ring and a second slip ring. The outer diameter of the first slip ring is equal to the outer diameter of the second slip ring and smaller than the outer diameter of the sliding sleeve. The second slip ring includes an inclined surface that is adapted to the surface shape of the stop. The other end of the first spring is fitted onto the outer circumference of the second slip ring and connected to the sliding sleeve. One end of the second spring is fitted onto the outer circumference of the first slip ring and connected to the sliding sleeve, and the other end of the second spring is connected to the connecting frame. In its natural state, the length of the first spring is greater than the length of the second spring. The other end of the connecting frame is connected to two connecting plates, one upper and one lower. An clearance space is formed inside the connecting frame. One end of the tensioning rod can extend into the clearance space. The bushing is fitted around the outer periphery of the tensioning rod. The bushing includes eight outer surfaces. Each of the upper and lower surfaces of the bushing is provided with a connecting post to connect the upper and lower connecting plates. A first hole is provided on the tensioning rod, and a second hole is provided on the side surface of the bushing. A transition surface is provided between the upper surface and the side surface of the bushing. A connecting ring is provided around the fastener within the clearance space. One end of the tensioning rod, after extending into the clearance space, can extend into the connecting ring for positioning. The other end of the tensioning rod is connected to the connecting block.

2. The chassis tensioning device according to claim 1, characterized in that: The number of the first holes is several.

3. The chassis tensioning device according to claim 1, characterized in that: The number of the second holes is several.

4. The chassis tensioning device according to claim 1, characterized in that: A third hole is provided on the transition surface.

5. A chassis tensioning device according to claim 4, characterized in that: The tensioning rod is provided with a fourth hole that mates with the third hole.

6. A chassis tensioning device according to claim 1, characterized in that: The connecting frame includes a main body, an outer edge, and ribs.

7. A chassis tensioning device according to claim 6, characterized in that: The clearance space is formed inside the main body, and the opening of the main body extends outward to form an outer edge.

8. A chassis tensioning device according to claim 7, characterized in that: The ribs are located on the outer wall of the main body.

9. A chassis tensioning device according to claim 8, characterized in that: The upper and lower connecting plates are connected to the outer edge.

10. A chassis tensioning device according to claim 1, characterized in that: The sliding sleeve, the first slip ring, and the second slip ring can move along the second cylinder.

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