A pair of rollers for bending a belt

Abstract

This utility model discloses a roller-type belt bending and forming device, including a support, on which two sets of rotating rollers are arranged opposite each other, including a first rotating roller and several second rotating rollers. The first rotating roller and the second rotating rollers can rotate synchronously and in opposite directions. Each set of rotating rollers is fitted with an annular segment, corresponding to the first annular segment and the second annular segment respectively. The first annular segment and the corresponding multiple second annular segments combine to form a forming unit. The distance between the first rotating roller and the multiple second rotating rollers is consistent, and the radius of the multiple second annular segments is consistent. When the belt passes between the two sets of annular segments, the two sets of annular segments can respectively form tensile forces of different magnitudes on the two sides of the belt, causing the belt to be formed into an approximately circumferential ring. This utility model can form the belt into a circumferential wear-resistant ring, making the wear-resistant ring fit more closely to the groove it is fitted with.

Description

Technical Field

[0001] This utility model relates to the field of wear-resistant ring forming technology, and in particular to a roller-type belt bending forming device. Background Technology

[0002] Wear rings are common components of hydraulic cylinders. They are used to reduce direct metal-to-metal contact between the piston and cylinder barrel, and between the cylinder head and piston rod, thus strengthening support and resisting lateral forces. After being cut into irregular shapes, wear rings may be cut during assembly because they cannot fit tightly into the grooves. To bend the belt into a ring shape, a forming device for belt bending must be provided. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a roller-type belt bending and forming device, which can form the belt into a circumferential wear-resistant ring, so that the wear-resistant ring fits better with the groove to be assembled.

[0004] Technical solution: To achieve the above objectives, the present invention provides a roller-type belt bending and forming device, which includes a support, on which two sets of rotating rollers are arranged opposite to each other, including a first rotating roller and several second rotating rollers, wherein the first rotating roller and the second rotating roller can rotate synchronously and in opposite directions.

[0005] Both sets of rotating rollers are fitted with annular sections, corresponding to the first annular section and the second annular section respectively. The first annular section and the corresponding multiple second annular sections are combined into a forming unit. The distance between the first rotating roller and the multiple second rotating rollers is the same, and the radius of the multiple second annular sections is the same. When the belt passes between the two sets of annular sections, the two sets of annular sections can respectively form tensile forces of different magnitudes on the two sides of the belt, so that the belt is formed into an approximately circular ring shape.

[0006] Furthermore, the annular segment includes a support layer of the inner ring and an elastic layer of the outer ring, and there are uniform and minute gaps between the outer circular surfaces of the first annular segment and the corresponding plurality of second annular segments.

[0007] Furthermore, the outer circular surface of the support layer is provided with an annular groove, and the elastic layer is attached to the surface of the support layer, so that the outer circular surface of the elastic layer forms a limiting groove that radially corresponds to the annular groove.

[0008] Furthermore, the support layer is provided with a plurality of annular grooves arranged along the axial direction.

[0009] Furthermore, the first roller is provided with a plurality of first annular segments along the axial direction, and the outer diameters of the plurality of first annular segments are different; the second roller is provided with a plurality of sets of second annular segments to form a plurality of forming units.

[0010] Furthermore, the annular segment is slidably mounted on the rotating roller, making the annular segment removable and replaceable.

[0011] Furthermore, the roller is provided with limiting ribs, and the inner wall of the annular section is provided with slots; when the annular section is installed on the roller, the limiting ribs are inserted into the slots accordingly, so that the annular section and the roller are circumferentially limited.

[0012] Furthermore, limiting rings are embedded in the two end faces of the annular segment, and the limiting rings are magnetic rings; on the same rotating roller, the two limiting rings opposite each other on two adjacent annular segments have the same magnetism, and adjacent forming units maintain a distance under the action of magnetic repulsion.

[0013] Furthermore, the two sets of rollers are connected by a drive mechanism, with one roller connected to a drive unit, and the two sets of rollers rotate in opposite directions under the drive of the drive unit.

[0014] Beneficial effects: The beneficial effects of the roller-type belt bending and forming device of this utility model are as follows:

[0015] 1) Multiple annular sections are set on each of a pair of rotating rollers, and two opposite annular sections form a forming unit. When the belt passes between two annular sections, the belt bends after passing between the two annular sections because the stretching effect of the two sets of annular sections on both sides of the belt is different. Also, since the points where the first annular section and multiple second annular sections squeeze and stretch the belt are on an arc trajectory, the wear-resistant ring after bending and forming is closer to the circumference, making it fit the groove better during assembly and avoiding cutting.

[0016] 2) The surface of the ring joint is made of elastic material and forms a limiting groove to protect the belt from excessive compression during the forming process and prevent it from losing its elasticity. This ensures that the formed wear-resistant ring has good support and sealing performance, and prevents the belt from shifting or slipping during the forming process. This ensures the stretching accuracy of both sides and further ensures that the formed ring is closer to a circumference.

[0017] 3) The radius of the ring section can be customized and can be freely disassembled and combined, improving the versatility and production efficiency of the device. Attached Figure Description

[0018] Appendix Figure 1 A schematic diagram of the overall bending and forming device for the belt;

[0019] Appendix Figure 2 for Figure 1 A sectional view of region A in the middle;

[0020] Appendix Figure 3 This is a schematic diagram of the cross-section of the roller and the annular section;

[0021] Appendix Figure 4This is a schematic diagram of the forming process of the belt being extruded through two sets of annular segments. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] As attached Figure 1-4 The aforementioned roller-type belt bending and forming device includes a support 1, on which two sets of rotating rollers 2 are arranged opposite each other, including a first rotating roller 21 and several second rotating rollers 22. The first rotating roller 21 and the second rotating rollers 22 can rotate synchronously and in opposite directions. Each set of rotating rollers 2 is fitted with an annular section 3, which corresponds to a first annular section 31 and a second annular section 32, respectively. The first annular section 31 and the corresponding multiple second annular sections 32 are combined into a forming unit. The distance between the first rotating roller 21 and the multiple second rotating rollers 22 is the same, and the radius of the multiple second annular sections 32 is the same, so that the points where the first annular section 31 and the multiple second annular sections 32 compress and stretch the belt are on an arc trajectory.

[0024] When the belt passes between the two sets of annular joints 3, the two sets of annular joints 3 can respectively exert tensile forces of different magnitudes on the two sides of the belt, so that the belt is formed into an approximately circular ring.

[0025] The forming device in this invention can be applied to the processing and forming of wear-resistant rings. In practical applications, the material of the belt body can be polytetrafluoroethylene, polyoxymethylene, polyurethane, nylon, etc. The wear-resistant ring formed by the forming device of this invention presents an approximately circumferential open ring structure. The open structure allows it to be opened during assembly, thus facilitating installation, and it can automatically fit into the groove under the action of its own deformation and restoring force. Because it is more approximately circumferential, the wear-resistant ring fits the groove more closely, thus avoiding possible cutting.

[0026] During the forming of the wear-resistant ring, the belt is first cut to the required length, usually shorter. When the belt passes between the two sets of annular sections 3, because the initial velocity of the belt is zero and the belt is short, the entire belt is in an accelerated state during the passing process. Furthermore, due to the synchronous rotation of multiple rollers, multiple annular sections simultaneously apply driving force to the belt, causing the tensile forces exerted on the belt by the multiple second annular sections 32 to be superimposed. Therefore, under the premise of synchronous rotation of multiple rollers, as long as the sum of the radii of the multiple second annular sections 32 is greater than the radius of the first annular section 31, it can be ensured that the sum of the linear velocities of the outer surfaces of the multiple second annular sections 32 is greater than the linear velocity of the outer surface of the first annular section 31. This results in the belt being stretched more at the contact surface with the second annular segment 32 than at the contact surface with the first annular segment 31. Consequently, after passing through the two sets of annular segments 3, the belt gradually bends towards the first annular segment 31. Since the points where the first annular segment 31 and multiple second annular segments 32 compress and stretch the belt are on an arc trajectory, the bent wear ring is closer to a circumference. This makes it easier for the wear ring to fit into the assembly groove during subsequent assembly, preventing the assembled wear ring from lifting and protruding from the groove due to poor fit. This also prevents the wear ring from being cut off when assembling the piston rod with the wear ring to the cylinder. Preferably, there can be two second annular segments 32 and two second rollers 22, with the axes of the two second rollers 22 and the first roller 21 arranged in an isosceles triangle.

[0027] Based on this, since the spacing between the first roller 21 and the multiple second rollers 22 is consistent, the difference in tensile force on both sides of the belt can be controlled by adjusting the radius ratio of the first annular section 31 to the second annular section 32.

[0028] When the radius of the first annular segment increases, the radius of the second annular segment decreases accordingly. The sum of the radii of multiple second annular segments decreases relatively, and the difference in tensile force on both sides decreases. This results in a larger bending arc after the belt is extruded, and a larger radius of the formed circumferential ring. Based on this, wear-resistant rings of different diameters can be processed and formed.

[0029] The annular segment 3 includes an inner ring support layer 33 and an outer ring elastic layer 34. A uniformly spaced, minute gap is maintained between the outer surfaces of the first annular segment 31 and the corresponding plurality of second annular segments 32. Since the outer surfaces of the two sets of annular segments 3 have different linear velocities, this gap prevents direct contact and interference between the two outer surfaces. However, this gap must be smaller than the thickness of the belt. Furthermore, the surface layer of the annular segment is designed as an elastic layer, allowing the elastic layer to be compressed to a certain extent when the belt passes through. This results in a flexible compression of the belt, preventing excessive stretching or damage due to rigid compression. This ensures that the belt retains good elasticity after being formed into a wear-resistant ring, thus fulfilling its intended supporting and sealing functions. On the other hand, the elastic layer after compression deformation can generate an elastic pressure on the surface of the belt, thereby increasing the static friction between the annular joint and the belt, preventing the surface of the annular joint from slipping on the surface of the belt when it is squeezed, thus ensuring the stretching accuracy and uniformity of the stretching degree on both sides of the belt, and further ensuring that the formed wear ring is closer to the circumference, improving the fit between the wear ring and the assembly groove.

[0030] The outer circular surface of the support layer 33 is provided with an annular groove 331. The elastic layer 34 is attached to the surface of the support layer 33, so that the outer circular surface of the elastic layer 34 forms a limiting groove 341 radially corresponding to the annular groove 331. The limiting groove 341 can provide a reference for the feeding position. The end of the belt is aligned with the position of the limiting groove 341 and fed between the two sets of annular sections to avoid the belt from deviating during feeding. In the entire forming process, the limiting groove 341 plays a role in restraining and guiding the belt, ensuring that the belt is squeezed only along the cross-sectional direction without lateral deviation, further improving the forming quality and ensuring that the formed wear-resistant ring is closer to the circumference.

[0031] Preferably, the support layer 33 is provided with a plurality of annular grooves 331 arranged along the axial direction. This allows the same molding unit to process multiple wear-resistant rings simultaneously, improving molding efficiency.

[0032] The first roller 21 has multiple first annular segments 31 arranged axially, and the outer diameters of the multiple first annular segments 31 are different; the second roller 22 has multiple sets of second annular segments 32 correspondingly arranged to form multiple forming units. Each forming unit can process wear-resistant rings of different diameters, thereby improving the versatility of the device.

[0033] In one embodiment, the annular segment 3 is fixedly installed on the rotating roller 2. When the rotating roller 2 rotates, it drives the annular segment 3 to rotate synchronously, which can meet the requirements of simultaneous processing and forming of various types of wear-resistant rings.

[0034] In another embodiment, the annular segment 3 is slidably mounted on the rotating roller 2. Through modular design, the annular segment 3 is detachable and replaceable. This allows for the simultaneous bending and forming of various types of wear-resistant rings, enabling arbitrary combinations of their types and further improving the versatility of the device.

[0035] Preferably, the rotating roller 2 is provided with limiting ribs 4, and the inner wall of the annular section 3 is provided with slots; when the annular section 3 is installed on the rotating roller 2, the limiting ribs 4 are inserted into the slots accordingly, so that the annular section 3 and the rotating roller 2 are circumferentially limited. This allows for quick replacement of the annular section.

[0036] Based on this, limiting rings 5 ​​are respectively embedded in the two end faces of the annular segment 3. The limiting rings 5 ​​are magnetic rings. On the same rotating roller 2, the two limiting rings 5 ​​on adjacent annular segments 3 have the same magnetism, and adjacent forming units maintain a distance under the action of magnetic repulsion. In addition, a magnetic element 8 is also provided on the support 1 at a position opposite to the end face of the annular segment 3. Magnetic repulsion is also generated between the magnetic element 8 and the limiting ring 5 on the end face of the opposite annular segment 3. Through the mutual magnetic repulsion, a mutual limiting effect is formed in the axial direction, ensuring that the annular segment will not slip along the axial direction during rotation with the shaft. In addition, relative friction is not likely to occur between the end faces of the annular segments 3, or between the end face of the annular segment 3 and the support 1.

[0037] The two sets of rotating rollers 2 are connected by a drive mechanism, with one of the rollers 2 connected to a drive device. The two sets of rollers 2 rotate in opposite directions under the drive of the drive device. Preferably, gears 6 are installed at the ends of the multiple rollers 2, and the gears 6 at the end of the first roller 21 mesh with the gears 6 at the ends of the corresponding multiple second rollers 22, which can ensure the synchronicity of the rotation of the multiple rollers.

[0038] The working method of this utility model is as follows: Start the motor 7, the motor 7 drives the two sets of rotating rollers 2 to rotate, and the two rotating rollers 2 rotate in opposite directions. Then, one end of the belt is extended between the two sets of annular sections 3. The belt will gradually squeeze into the two sets of annular sections 3. Since the two sets of annular sections in the same forming unit exert different stretching effects on the two sides of the belt, the stretching degree on both sides of the belt is different. Therefore, after the belt is squeezed between the two annular sections 3, the belt will bend. The bent belt can be processed into annular parts, such as wear-resistant rings.

[0039] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A pair of roll type belt body bending forming apparatuses characterized by: Includes a support (1), on which two sets of rotating rollers (2) are arranged opposite to each other, including a first rotating roller (21) and several second rotating rollers (22), the first rotating roller (21) and the second rotating rollers (22) can rotate synchronously and in opposite directions; Both sets of rotating rollers (2) are fitted with annular sections (3), which correspond to the first annular section (31) and the second annular section (32) respectively. The first annular section (31) and the corresponding multiple second annular sections (32) are combined into a forming unit. The distance between the first rotating roller (21) and the multiple second rotating rollers (22) is the same, and the radius of the multiple second annular sections (32) is the same. When the belt passes between the two sets of annular sections (3), the two sets of annular sections (3) can respectively form tensile forces of different magnitudes on the two sides of the belt, so that the belt is formed into an approximately circumferential ring.

2. A pair of roll belt bending forming apparatus according to claim 1, characterized in that: The annular segment (3) includes an inner ring support layer (33) and an outer ring elastic layer (34), and there are uniform and small gaps between the outer surfaces of the first annular segment (31) and the corresponding plurality of second annular segments (32).

3. A pair of roll belt bending forming apparatus according to claim 2, wherein: The outer circular surface of the support layer (33) is provided with an annular groove (331), and the elastic layer (34) is attached to the surface of the support layer (33), so that the outer circular surface of the elastic layer (34) forms a limiting groove (341) that radially corresponds to the annular groove (331).

4. A pair of roll belt bending forming apparatus according to claim 3, wherein: The support layer (33) is provided with a plurality of annular grooves (331) arranged along the axial direction.

5. A pair of roll belt bending forming apparatus according to claim 1, wherein: The first roller (21) is provided with a plurality of first annular segments (31) along the axial direction, and the outer diameters of the plurality of first annular segments (31) are different; the second roller (22) is provided with a plurality of second annular segments (32) to form a plurality of forming units.

6. A pair of roll belt bending forming apparatus according to claim 5, wherein: The annular section (3) is slidably installed on the rotating roller (2), so that the annular section (3) can be disassembled and replaced.

7. A pair of roll belt bending forming apparatus according to claim 6, wherein: The roller (2) is provided with a limiting rib (4), and the inner wall of the annular section (3) is provided with a slot; when the annular section (3) is installed on the roller (2), the limiting rib (4) is inserted into the slot to limit the annular section (3) and the roller (2) circumferentially.

8. A pair of roll belt bending forming apparatus according to claim 7, wherein: Limiting rings (5) are embedded in the two end faces of the annular section (3), and the limiting rings (5) are magnetic rings. On the same roller (2), the two limiting rings (5) on adjacent annular sections (3) have the same magnetism, and adjacent forming units maintain a distance under the action of magnetic repulsion.

9. A pair of roll belt bending forming apparatuses according to claim 1, characterized in that: The two sets of rollers (2) are connected by a drive, and one of the rollers (2) is connected to a drive device. The two sets of rollers (2) rotate in opposite directions under the drive of the drive device.

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