Alloy composite roller

Abstract

The utility model relates to the technical field of rollers, in particular to an alloy composite roller. The utility model discloses an alloy composite roller which comprises a roller body, a shaft shoulder arranged on one axial side of the roller body and a limiting piece arranged on the other axial side of the roller body, a roller ring and a spacer ring which are sequentially arranged in a penetrating mode are arranged between the shaft shoulder and the limiting piece, and a pressing mechanism is arranged between the roller ring and the spacer ring. A displacement part is arranged between at least one distance ring located at the axial center position and the roller ring, and the pressing mechanism is arranged between the displacement part and the distance ring. The device has the advantages that acting force is applied to the two axial sides of the roller shaft, so that the pressing force of the roller rings at the farthest positions of the two axial sides is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling rolls, in particular to an alloy composite roll. Background Art

[0002] A Chinese patent with the application number 201710801251.3 discloses a cemented carbide composite roll, which includes a roll shaft, a cemented carbide roll ring, a locking nut and a fastening nut. The cemented carbide roll ring is sleeved on the roll shaft. One end of the roll shaft is provided with a shoulder. A piston is arranged between the cemented carbide roll ring and the shoulder. An oil injection cavity is formed between the piston and the end face of the shoulder.

[0003] In the above technical solution, by alternately arranging the cemented carbide roll ring and the piston, and then pressurizing the oil injection cavity, a force acting along the axis direction of the roll shaft is provided for the cemented carbide roll ring, aiming to press the roll ring through the cooperation of the piston and the shoulder and maintain a continuous pressure on its surface. However, the setting method of the oil injection cavity at one end of the roll shaft has a problem of force transmission efficiency. Since the oil injection cavity is arranged at one end of the roll shaft, and the cemented carbide roll ring and the piston are distributed along the axial direction of the roll shaft, when pressure is applied through the oil injection cavity, this pressure needs to pass through multiple roll rings and pistons to finally act on the roll ring at the farthest distance. This long force transmission path increases the loss of force and weakens the pressing force acting on the roll ring at the farthest distance. Therefore, the overall working performance and stability of the composite roll cannot be guaranteed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an alloy composite roll that can apply forces to both axial sides of the roll shaft to ensure the pressing force of the roll rings at the farthest positions on both axial sides.

[0005] To achieve the above purpose, the utility model discloses an alloy composite roll, which includes a roll shaft, a shoulder arranged at one axial end of the roll shaft, and a limiting member arranged at the other axial end of the roll shaft and detachably connected to the roll shaft. A roll ring and a spacer ring are alternately arranged in sequence on the outer circumference of the roll shaft between the shoulder and the limiting member. A displacement member capable of axially sliding on the roll shaft is arranged between the roll ring and the spacer ring. A tightening mechanism is arranged on the spacer ring. The tightening mechanism can push the displacement member to axially slide and tighten the roll ring between the shoulder and the limiting member.

[0006] When it is necessary to fix the roll ring, the roll ring and the spacer ring are alternately sleeved on the outer cylindrical surface of the roll shaft in sequence, and the roll ring is clamped in a manner of being matched with the shoulder through the spacer ring, between the spacer rings, between the limiting member and the spacer ring, and between the displacement member and the spacer ring. After the sleeving is completed, the contact area between the spacer ring and the roll ring is the surface area of the roll ring close to the spacer ring side. The tightening mechanism located at the center of the roll shaft axis elongates under the action of oil pressure, and the mutually matched spacer ring, shoulder and limiting member fix the roll ring.

[0007] By directly arranging the tightening mechanism at the center of the axis of the roller shaft, the present utility model avoids the problem of force loss caused by the long-distance force transmission path. When the oil pressure acts on the tightening mechanism, it can quickly and directly apply a pressing force to the roller ring without passing through multiple roller rings and pistons, thereby significantly improving the pressing efficiency and ensuring that the outermost roller ring can also obtain sufficient pressing force.

[0008] Preferably, a support member is provided between the displacement member and the spacer ring, and the displacement member extends towards the spacer ring side with a step for the support member to be embedded.

[0009] The support member can be a number of workpieces with sufficient thickness to resist the pressure between the displacement member and the spacer ring, such as gaskets with a rectangular or semi-circular cross-section.

[0010] The height of the support member can be post-processed to adapt to the distance between the displacement member and the spacer ring, and then the support member is assembled between the displacement member and the spacer ring by an interference fit method, thereby reducing the risk of loosening of the two side surfaces of the support member along the axial direction.

[0011] Preferably, a relief space for facilitating the radial movement of the support member along the roller shaft is provided inside the support member.

[0012] The relief space is a slotted opening towards the roller shaft side. By means of the relief space, it is prevented that the support member is stuck by the tightening mechanism when moving towards the roller shaft between the displacement member and the spacer ring.

[0013] Preferably, the outer diameter of the cross-section of the support member along the axial direction is smaller than the outer diameter of the cross-section of the displacement member along the axial direction.

[0014] By setting the outer surface of the support member to be shrunk into the gap between the displacement member and the spacer ring, a stable hidden protection structure is formed. Not only does it reduce the volume of the support member directly exposed to the external environment, but also through the tight wrapping of the surrounding components, it effectively prevents the risk of the support member falling off or being damaged due to external forces such as collision and impact during use, processing or transportation, thereby significantly enhancing the stability and durability of the entire structure.

[0015] Preferably, the tightening mechanism includes an oil inlet passage provided in the spacer ring and a piston chamber communicating with the oil inlet passage and arranged along the axial direction of the roller ring. A piston capable of moving axially along the inner wall of the piston chamber is provided in the piston chamber. One end of the piston abuts against the displacement member, and the other end of the piston is connected to the oil inlet passage. When pressure injection is carried out into the oil inlet passage, the piston can push the displacement member to move axially under the action of the oil pressure.

[0016] During pressing, the piston moves away from the piston cavity under the action of hydraulic pressure, thereby pushing the displacement member to move along the axial direction of the roller shaft, so as to squeeze the roller rings on both sides by using the displacement member and the spacer ring located at the axial middle position, and fix the roller rings and the spacer ring between the shaft shoulder and the limiting member.

[0017] Preferably, there is a gap between the end of the piston and the axial end face of the piston cavity.

[0018] The gap between the end of the piston and the axial end face of the piston cavity facilitates the entry of oil into the piston cavity and ensures the contact area between the oil and the end of the piston.

[0019] Preferably, a chamfer is provided on the end face of the piston connected to the oil inlet passage, and the chamfer is provided to facilitate the assembly of the piston into the piston cavity.

[0020] Preferably, an annular groove is provided on the outer wall of the piston, and a sealing ring is sleeved in the groove to seal between the outer wall of the piston and the inner wall of the piston cavity.

[0021] The sealing ring is used to ensure the sealing performance between the piston and the inner wall of the piston cavity.

[0022] Preferably, a force application hole or a force application groove for applying a circumferential force to the limiting member is provided on the side wall of the limiting member.

[0023] The force application hole or the force application groove is used in combination with a pin. When assembling the limiting member and the roller shaft, the limiting member is rotated by using the pin and the limiting member is locked with the roller shaft, increasing the force arm during the rotation of the limiting member, and improving the locking effect between the limiting member and the roller shaft compared with the method of directly rotating the limiting member manually.

[0024] The utility model can fix the roller rings on both axial sides of the roller shaft at the same time, reduce the force transmission path, reduce the force loss, ensure the pressing force reaching the outermost roller ring, and thus ensure the working performance and stability of the composite roller as a whole. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the utility model.

[0026] Figure 2 is Figure 1 the enlarged view of part A in

[0027] In the figure: 11, roller shaft; 12, roller ring; 13, spacer ring; 14, locking nut; 15, force application hole; 22, oil inlet passage; 23, piston cavity; 24, annular piston; 25, sealing ring; 26, push ring; 30, gasket; 31, relief space. Detailed Embodiment

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

[0029] As Figure 1 shown, this embodiment discloses an alloy composite roll, which includes a roll shaft 11, a shaft shoulder provided on one side of the roll shaft 11 in the axial direction, and a limiting member provided on the other side of the roll shaft in the axial direction. The limiting member is a locking nut 14. A roll ring 12 and a spacer ring 13 are alternately arranged between the shaft shoulder and the locking nut 14. A tightening mechanism is provided between the roll ring 12 and the spacer ring 13. A displacement member is provided between at least one spacer ring 13 located at the axial center position and the roll ring 12. The displacement member is a pushing ring 26. The tightening mechanism is provided between the pushing ring 26 and the spacer ring 12. A support member is provided between the pushing ring 26 and the spacer ring 13. The support member is a semi-circular gasket 30. The pushing ring 26 extends towards the spacer ring 13 side with a step for the gasket 30 to be embedded. A relief space 31 is provided in the gasket 30. The relief space 31 is a slot opening towards the roll shaft side, thereby preventing the gasket 30 from being stuck by the tightening mechanism during the movement between the pushing ring 26 and the spacer ring 13 towards the roll shaft 11. The outer diameter of the gasket 30 along the axial cross-section is smaller than the outer diameter of the pushing ring 26 along the axial cross-section, thereby reducing the volume of the gasket 30 directly exposed to the external environment.

[0030] As Figure 2 shown, the tightening mechanism includes an oil inlet channel 22 provided in the spacer ring 12 and a piston chamber 23 communicating with the oil inlet channel 22. The oil inlet channel 22 includes a connection section for aligning with an oil gun, an assembly section for assembling with the external thread of the oil gun surface, an oil passage for oil inlet, and a turning section for connecting the oil passage with the piston chamber. A piston capable of moving axially along the inner wall of the piston chamber 23 relative to the piston chamber 23 is provided in the piston chamber 23. The piston is an annular piston 24. One end face of the annular piston 24 in contact with the oil inlet channel 22 is provided with a chamfer. A sealing ring 25 is embedded on the outer wall of the annular piston 24 to ensure the sealing performance between the annular piston 24 and the inner wall of the piston chamber 23. In the initial state, there is a gap of at least 1 mm between the annular piston 24 and the axial end face of the piston chamber 23 in the piston chamber 23. The gap between the annular piston 24 and the bottom wall of the piston chamber 23 facilitates the entry of oil into the piston chamber 23.

[0031] The locking nut 14 is provided with a force application hole 15 facilitating the application of circumferential force to the locking nut 14. The force application hole 15 includes an inner section and an outer section and is adapted to the shape of the plug. The inner diameter of the outer section of the force application hole 15 is larger than that of the inner section. The inner section of the force application hole 15 is a threaded section, and the threaded section of the force application hole 15 is in threaded fit with one end of the plug. After inserting the threaded section of the plug into the force application hole 15, the locking nut 14 is rotated by the plug. After the locking nut 14 is locked by its own thread, the plug is manually rotated. After the plug is screwed to contact the roller shaft 11 through its own thread, the plug is continuously rotated, so that the plug abuts against the roller shaft 11, thereby making the locking nut 14 and the roller shaft 11 eccentrically shaped.

[0032] When the roller ring 12 needs to be fixed, the roller ring 12 and the spacer ring 13 are alternately sleeved on the outer circumferential surface of the roller shaft 11 in sequence, and the roller ring 12 is clamped in a manner of being matched with the shaft shoulder through the spacer ring 13, between the spacer rings 13, between the locking nut 14 and the spacer ring 13, and between the pushing ring 26 and the spacer ring 13. After the sleeving is completed, the annular piston 24 located at the center of the roller shaft axis moves away from the piston cavity 23 under the action of hydraulic pressure, thereby pushing the pushing ring 26. Thus, the roller ring 12 is squeezed from both sides by the pushing ring 26 and the spacer ring 13 located at the axial center position, and the mutually matched spacer ring 13, shaft shoulder and locking nut 14 fix the roller ring 12. At this time, the processed gasket 30 is assembled between the pushing ring 26 and the spacer ring 13 by interference fit, and is embedded into the step of the pushing ring 26, thereby reducing the loosening hidden danger of both side surfaces of the gasket 30 along the axial direction, reducing the force transmission path, ensuring the pressing force of the outermost roller ring 12, and fixing the outermost roller ring 12.

Claims

1. An alloy composite roll, comprising a roll shaft, a shoulder provided at one axial end of the roll shaft, and a limiting member provided at the other axial end of the roll shaft and detachably connected to the roll shaft. A roll ring and a spacer ring are alternately arranged in sequence on the roll shaft between the shoulder and the limiting member. It is characterized in that: A displacement member capable of axially sliding on the roller shaft is provided between the roll ring and the spacer ring. A tightening mechanism is provided on the spacer ring, and the tightening mechanism can push the displacement member to axially slide and tighten the roll ring between the shaft shoulder and the limiting member.

2. The alloy composite roll according to claim 1, characterized in that: A support member is provided between the displacement member and the spacer ring, and the displacement member extends toward the spacer ring side with a step for the support member to be embedded.

3. The alloy composite roll according to claim 2, wherein: A relief space is provided inside the support member to facilitate the radial movement of the support member along the roller shaft.

4. The alloy composite roll according to claim 2 or 3, characterized in that: The outer diameter of the support member along the axial cross-section is smaller than the outer diameter of the displacement member along the axial cross-section.

5. The alloy composite roll according to claim 1, wherein: The tightening mechanism includes an oil inlet channel provided in the spacer ring and a piston chamber communicating with the oil inlet channel and arranged along the axial direction of the roll ring. A piston capable of axially moving relative to the inner wall of the piston chamber is provided in the piston chamber. One end of the piston abuts against the displacement member, and the other end of the piston is connected to the oil inlet channel. When pressure oil is injected into the oil inlet channel, the piston can push the displacement member to axially move under the action of oil pressure.

6. The alloy composite roll according to claim 5, characterized in that: There is a gap between the end of the piston and the axial end face of the piston chamber.

7. The alloy composite roll according to claim 5, wherein: The end face of the piston connected to the oil inlet channel is provided with a chamfer.

8. An alloy composite roll according to claim 5 or 6 or 7, characterized in that: An annular groove is provided on the outer wall of the piston, and a sealing ring is sleeved in the groove to seal between the outer wall of the piston and the inner wall of the piston chamber.

9. The alloy composite roll according to claim 1, characterized in that: The side wall of the limiting member is provided with a force application hole or a force application groove for applying a circumferential force to the limiting member.

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