Sleeve prepressing device for accelerator cable elbow

Abstract

The invention belongs to the technical field of plastic bent pipe processing, and relates to a sleeve prepressing device for an accelerator cable bent pipe, which comprises a conveying belt device (1) and a frame body structure (2) arranged on the conveying belt device (1), overpressure cylinders (3) are symmetrically arranged on the frame body structure (2), the two overpressure cylinders (3) are connected with an upper die (4), an elastic support guide structure (5) is arranged in the middle of the upper die (4), and the elastic support guide structure (5) is connected with the frame body structure (2). Bending structures (6) are symmetrically arranged on the two sides of the upper die (4), each bending structure (6) comprises a sliding assembly (7), a rotating assembly (8) and a clamping guide assembly (9), each clamping guide assembly (9) comprises an upper side guide body (10) and a lower side guide body (11), and the upper side guide bodies (10) and the lower side guide bodies (11) are symmetrically connected with arc-shaped guide plates (13) through springs (12). According to the sleeve prepressing device for the accelerator cable bent pipe, stable bending of the sleeve can be achieved, stress concentration is avoided, and meanwhile automatic demolding can be achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic pipe bending processing and relates to a sleeve pre-pressing device for a throttle cable pipe bending. Background Art

[0002] When the throttle cable bend is produced, a plastic tube liner needs to be sleeved inside the bend. The throttle cable bend has a certain curvature. When the plastic tube liner is directly sleeved, the plastic tube liner needs to be pre-pressed into a curvature that matches the throttle cable bend.

[0003] At present, the plastic liner pipe is usually bent by means of a bending device, for example, a casing pre-pressing device for a throttle cable bend pipe disclosed in patent CN213564336U is provided with a fixed block having an arc surface, and a sliding block also having an arc surface. The plastic pipe is placed between the sliding block and the fixed block, and the plastic pipe is pushed by the movement of the sliding block, and the bending of the plastic pipe is achieved by using two arc surfaces. In this way, there is no guidance and limit during the bending process, the product yield is low, and the extrusion process is easy to cause damage to the plastic pipe.

[0004] In order to improve the stability of the plastic pipe bending process and ensure the final bending effect, bending equipment with a fixed guide structure has emerged. For example, a plastic conduit bending device disclosed in CN113561456B is provided with a preheating structure to preheat the plastic pipe first so that the bending operation can proceed smoothly. When bending the pipe, the plastic pipe is first clamped and fixed from both ends by a fixed structure, and then bent by a bending piece set in the middle. Although this method can improve the stability of the bending operation, since the two ends of the plastic pipe are clamped and fixed during the bending process, stress concentration problems are prone to occur in the middle and the two ends of the bent pipe, thereby causing damage to the plastic pipe. In addition, in the above method, after the bending mold is used to bend the pipe, there is a situation where the bent pipe adheres to the mold after forming (especially the plastic pipe is preheated before bending), which makes demolding inconvenient. Summary of the invention

[0005] The object of the present invention is to solve the above-mentioned problem and provide a sleeve preloading device for a throttle cable bend pipe.

[0006] To achieve the above-mentioned purpose, the present invention provides a sleeve pre-stressing device for a throttle cable bending pipe, comprising a conveyor belt device and a frame structure installed on the conveyor belt device, the frame structure is symmetrically provided with over-pressure cylinders, two of the over-pressure cylinders are connected to an upper mold, an elastic supporting guide structure is installed in the middle of the upper mold, and bending structures are symmetrically provided on both sides of the upper mold, the bending structure comprises a sliding assembly, a rotating assembly and a clamping guide assembly, the clamping guide assembly comprises an upper guide body and a lower guide body, and the upper guide body and the lower guide body are both connected to an arc guide plate through a spring.

[0007] Furthermore, connecting ears are symmetrically provided at both ends of the upper mold, and the connecting ears are fixedly connected to the overpressure cylinder.

[0008] Furthermore, the upper mold has a mold groove, an arc-shaped limiting groove is provided in the middle of the mold groove, a receiving groove is provided in the arc-shaped limiting groove, and a through hole is provided at the bottom of the receiving groove to penetrate the upper mold.

[0009] Furthermore, the elastic support guide structure includes a movable rod arranged through the through hole, the lower end of the movable rod is connected to a fixed block, the lower side of the fixed block is connected to an arc-shaped support plate, and a torsion spring structure is connected between the fixed block and the arc-shaped support plate.

[0010] Furthermore, a limit seat is fixedly connected to the upper mold, and a through hole is provided in the middle of the limit seat for the movable rod to pass through; The movable rod is also fixedly connected with a pressure ring, which is supported at the middle of the upper side surface of the upper mold. A return spring is provided on the outer periphery of the portion of the movable rod located between the pressure ring and the limiting seat.

[0011] Furthermore, the clamping guide assembly includes symmetrically arranged rotating plates, and the upper guide body is located between the two rotating plates and is fixedly connected to the two rotating plates; The upper guide body has an upper arc-shaped guide groove; Furthermore, the lower ends of the two rotating plates are fixedly connected through a bottom plate, a lifting cylinder is provided on the bottom plate, the lifting cylinder is fixedly connected to the lower guide body, and the lower guide body has a lower arc guide groove; Further, the sliding assembly includes a sliding connection plate, a vertical connection plate and a mounting plate; The sliding connection plate has a threaded hole and a limiting sliding block, the threaded hole is threadedly matched with a threaded rod, one end of the threaded rod extends into the slide slot and is rotatably installed in the slide slot, and the end of the threaded rod located outside the slide slot is connected to a motor.

[0012] Furthermore, the sliding connection plate, the vertical connection plate and the mounting plate are integrally formed; The rotating assembly is a rotating motor installed on the mounting plate. The rotating shaft of the rotating motor passes through the vertical connecting plate and is fixedly connected to the rotating plate. The rotating motor drives the rotating plate to rotate.

[0013] The beneficial effects of the present invention are as follows: 1. The casing pre-pressing device for the throttle cable bending pipe of the present invention can realize the automated operation of casing bending through the above-mentioned arrangement of the upper mold, the elastic support guide structure and the bending structure, with a high degree of automation and without excessive manual intervention.

[0014] 2. The sleeve preloading device for the throttle cable bending pipe of the present invention has good stability and sliding space during the sleeve bending process through the upper guide body, the lower guide body and the elastic support guide structure in the middle. It can reduce or even avoid the damage caused by stress concentration.

[0015] 3. The sleeve pre-pressing device for the throttle cable bending pipe of the present invention can flexibly adjust the bending curvature of the upper mold through the above-mentioned settings of the upper mold and the overpressure cylinder, which is beneficial to improving production efficiency and improving the yield rate of product bending curvature.

[0016] 4. The sleeve preloading device for the throttle cable bending pipe of the present invention has an elastic support guide structure that is provided to reduce stress concentration and improve bending stability, and is also beneficial to demoulding of the plastic pipe after bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A perspective view schematically showing a sleeve preloading device for a throttle cable bend according to an embodiment of the present invention; Figure 2 Schematically showing a front view of a sleeve preloading device for a throttle cable bend according to an embodiment of the present invention; Figure 3 A right side view schematically showing a sleeve preloading device for a throttle cable bend pipe according to an embodiment of the present invention; Figure 4 Schematic representation Figure 2 Enlarged view of part A in the middle; Figure 5 Schematic representation Figure 2 Enlarged view of middle part B; Figure 6 A schematic diagram showing the structure of an upper mold according to an embodiment of the present invention; Figure 7 A perspective view schematically showing a bending structure according to an embodiment of the present invention; Figure 8 A side view schematically shows a bending structure according to an embodiment of the present invention.

[0018] The meanings of the symbols in the accompanying drawings are as follows: 1. Conveyor belt device; 2. Frame structure; 3. Overpressure cylinder; 4. Upper mold; 5. Elastic support guide structure; 6. Bending structure; 7. Sliding assembly; 8. Rotating assembly; 9. Clamping guide assembly; 10. Upper guide body; 11. Lower guide body; 12. Spring; 13. Arc guide plate; 41. Connecting ear; 42. Die groove; 43. Arc limit groove; 44. Accommodating groove; 45. Through hole; 51. Movable rod; 5 2. Fixed block; 53. Arc-shaped support plate; 54. Torsion spring structure; 46. Limit seat; 55. Pressure ring; 56. Return spring; 91. Rotating plate; 101. Upper arc-shaped guide groove; 92. Bottom plate; 93. Lifting cylinder; 111. Lower arc-shaped guide groove; 71. Sliding connecting plate; 72. Vertical connecting plate; 73. Mounting plate; 711. Threaded hole; 712. Limit slider; 47. Slide groove; 48. Threaded rod; 49. Motor. DETAILED DESCRIPTION

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0021] Combination Figure 1-Figure 8 As shown, the present invention provides a casing pre-pressing device for a throttle cable bending pipe, comprising a conveyor belt device 1, a frame structure 2, an overpressure cylinder 3, an upper mold 4, an elastic support guide structure 5 and a bending structure 6.

[0022] According to one embodiment of the present invention, a conveyor belt device 1 is used to transport the plastic pipe after the pipe bending operation backward, and a frame structure 2 is fixedly installed on a support frame of the conveyor belt device 1 by bolts, and the frame structure 2 includes an L-shaped connecting frame and a vertical mounting plate fixedly connected to the L-shaped connecting frame. The overpressure cylinder 3 of the present invention is symmetrically installed on the vertical mounting plate, and the upper mold 4 is fixedly connected to the two overpressure cylinders 3 respectively. Specifically, connecting ears 41 are symmetrically provided at both ends of the upper mold 4, and the connecting ears 41 are fixedly connected to the overpressure cylinder 3. With such a configuration, the bending curvature of the upper mold 4 can be adjusted by the overpressure cylinder 3. On the one hand, it can be quickly adjusted for plastic pipes with different bending requirements, avoiding the need to replace molds with different curvatures. In addition, another purpose of such a setting is that, since the plastic tube itself has a certain elasticity, there is a rebound effect in the bending process, that is, the bending operation of the plastic tube is performed according to the curvature of the mold, and the curvature of the final plastic tube will be smaller than the curvature of the mold. The usual practice is to set the curvature of the mold to be slightly larger than the curvature of the final plastic tube when it is formed, considering the rebound problem. However, the curvature of the mold is still fixed. In actual production, it is still easy to have a situation where the curvature of the plastic tube does not meet the requirements. However, through the setting of the overpressure cylinder 3 of the present invention, after the plastic tube is bent along the upper mold 4, the overpressure cylinder 3 can be used to push the connecting ear 41 downward, so that the curvature of the upper mold 4 is further increased, so that the curvature of the plastic tube meets the requirements. If the one-time processing does not meet the requirements, the device of the present invention can be used to conveniently perform the adjustment operation again.

[0023] According to one embodiment of the present invention, the upper mold 4 has an upwardly arched mold groove 42, an arc-shaped limiting groove 43 is provided in the middle of the mold groove 42, a receiving groove 44 is provided in the arc-shaped limiting groove 43, and a through hole 45 is provided at the bottom of the receiving groove 44 to penetrate the upper mold 4. The elastic support guide structure 5 of the present invention is installed in the middle of the upper mold 4. Specifically, the elastic support guide structure 5 includes a movable rod 51 arranged through the through hole 45, a fixed block 52 is connected to the lower end of the movable rod 51, an arc-shaped support plate 53 is connected to the lower side of the fixed block 52, and a torsion spring structure 54 is connected between the fixed block 52 and the arc-shaped support plate 53. The upper mold 4 is fixedly connected to the limiting seat 46, and a through hole is provided in the middle of the limiting seat 46 for the movable rod 51 to pass through. The movable rod 51 is also fixedly connected to the pressing ring 55, which is supported in the middle of the upper side of the upper mold 4, and a reset spring 56 is provided on the outer periphery of the part of the movable rod 51 located between the pressing ring 55 and the limiting seat 46.

[0024] In the sleeve pre-stressing device for a throttle cable bending pipe of the present invention, when the bending structure 6 applies a force to the plastic pipe from both ends of the plastic pipe to make the plastic pipe bend downward, the middle part of the plastic pipe moves upward to generate a force on the arc support plate 53, and under the guidance of the arc support plate 53, it moves upward, and the arc support plate 53 moves with it, so that the movable rod 51 moves upward. At this time, the pressure ring 55 moves upward to gradually compress the reset spring 56, and the fixed block 52 gradually enters the accommodating groove 44 to cooperate with it. At the same time, the arc support plate 53 moves into the arc limit groove 43. Under the limiting action of the arc limit groove 43, the arc support plate 53 gradually bends until it is completely adapted to the arc limit groove 43 and is located in the arc limit groove 43. At this time, the torsion spring structure 54 is in a stretched state. When the pipe bending operation is completed, the force of the bending structure 6 is cancelled and it is moved out of the plastic pipe. At this time, under the action of the reset spring 56, the movable rod 51 is reset, that is, the arc support plate 53 is reset downward. In this process, if the plastic bent pipe is adhered to the upper mold 4, it can be automatically demolded under the action of the arc support plate 53, and the plastic pipe falls on the conveyor belt device 1 and continues to be transported forward.

[0025] Combination Figure 1-Figure 3 , Figure 5 , Figure 7-Figure 8 As shown, according to an embodiment of the present invention, a bending structure 6 is symmetrically arranged on both sides of the upper mold 4, and the bending structure 6 is used to apply a bending force from both sides of the plastic tube. In this embodiment, the bending structure 6 includes a sliding component 7, a rotating component 8 and a clamping guide component 9, and the clamping guide component 9 includes an upper guide body 10 and a lower guide body 11, and the upper guide body 10 and the lower guide body 11 are both connected to an arc guide plate 13 through a spring 12.

[0026] The clamping guide assembly 9 includes symmetrically arranged rotating plates 91, an upper guide body 10 is located between the two rotating plates 91 and is fixedly connected to the two rotating plates 91, and the upper guide body 10 has an upper arc-shaped guide groove 101. In this embodiment, the lower ends of the two rotating plates 91 are fixedly connected by a bottom plate 92 to ensure structural strength. Figure 7 As shown, a fixed connecting plate can be further provided at the left ends of the two rotating plates 91 to connect the two rotating plates 91. In this embodiment, a lifting cylinder 93 is provided on the bottom plate 92, and the lifting cylinder 93 is fixedly connected to the lower guide body 11, and the lower guide body 11 has a lower arc guide groove 111.

[0027] According to an embodiment of the present invention, the sliding assembly 7 includes a sliding connection plate 71, a vertical connection plate 72 and a mounting plate 73. In this embodiment, the sliding connection plate 71, the vertical connection plate 72 and the mounting plate 73 are integrally formed. The sliding connection plate 71 has a threaded hole 711 and a limit slider 712. The frame structure 2 is provided with a slide groove 47 that matches the sliding connection plate 71 and the limit slider 712. The threaded hole 711 is threadedly matched with a threaded rod 48. One end of the threaded rod 48 extending into the slide groove 47 is rotatably installed in the slide groove 47. The end of the threaded rod 48 outside the slide groove 47 is connected to a motor 49. When the motor 49 drives the threaded rod 48 to rotate, the sliding assembly 7 can be moved along the slide groove 47, and then the upper guide body 10 and the lower guide body 11 can be sleeved on the outer periphery of the plastic pipe to achieve the clamping of the plastic pipe.

[0028] In this embodiment, the rotating assembly 8 is a rotating motor installed on the mounting plate 73. The rotating shaft of the rotating motor passes through the vertical connecting plate 72 and is fixedly connected to the rotating plate 91. The rotating motor drives the rotating plate 91 to rotate. Specifically, there is no fixed connection relationship between the rotating motor and the vertical connecting plate 72, and there is no fixed connection relationship between the rotating plate 91 and the vertical connecting plate 72. When the rotating motor drives the rotating plate 91 to rotate, the vertical connecting plate 72 does not move. When the rotating plate 91 rotates, due to the above-mentioned arrangement of the upper guide body 10 and the lower guide body 11, the upper guide body 10 and the lower guide body 11 rotate, thereby generating a bending force on the plastic pipe. Due to the arrangement of the spring 12 and the arc-shaped guide plate 13, when the plastic pipe is bent, the two ends are not fixedly clamped, and the plastic pipe can slide along the arc-shaped guide 13 to a certain extent, thereby effectively avoiding damage caused by stress concentration problems.

[0029] The working principle of the casing preloading device for the throttle cable bend pipe of the present invention is as follows: First, the feeding device is used. The feeding device is located behind the conveyor belt device 1, including a conveyor slide rail, a lifting device slidably mounted on the conveyor slide rail, and a feeding bracket mounted on the lifting device. After receiving the plastic tube, the feeding bracket moves along the conveyor slide rail to the bottom of the upper mold 4, and then is lifted to a set height by the lifting device (the feeding device is a prior art, not shown in the figure). However, the motor 49 works, so that the bending structure 6 is sleeved on the outer circumference of the plastic tube from both ends of the plastic tube. After the bending structure 6 moves into place, the rotating assembly 8 works, so that the rotating plate 91 rotates, applies a bending force to the plastic tube, and the middle part of the plastic tube moves upward, pushing the movable rod 51 to move upward until the plastic tube is completely fitted with the mold groove 42 of the upper mold 4. After a period of time, the motor 49 reverses, so that the bending structure 6 moves outward, and the lifting cylinder 93 drives the lower side guide body 11 to move downward, thereby loosening the plastic tube, and the plastic tube falls on the conveyor belt device 1 under the action of gravity and is transported forward. The movable rod 51 can be reset downward under the action of the reset spring 56, thereby solving the problem that the plastic is easily adhered to the upper mold 4 and is inconvenient to demould.

[0030] The above is only one embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A casing preloading device for a throttle cable bend, characterized in that: The invention comprises a conveyor belt device (1) and a frame structure (2) installed on the conveyor belt device (1), wherein overpressure cylinders (3) are symmetrically arranged on the frame structure (2), and two overpressure cylinders (3) are connected to an upper mold (4), and an elastic support guide structure (5) is installed in the middle of the upper mold (4), and bending structures (6) are symmetrically arranged on both sides of the upper mold (4), and the bending structure (6) comprises a sliding assembly (7), a rotating assembly (8) and a clamping guide assembly (9), and the clamping guide assembly (9) comprises an upper guide body (10) and a lower guide body (11), and the upper guide body (10) and the lower guide body (11) are both connected to an arc-shaped guide plate (13) via a spring (12).

2. The casing preloading device for the throttle cable bend according to claim 1, characterized in that: Connecting ears (41) are symmetrically provided at both ends of the upper mold (4), and the connecting ears (41) are fixedly connected to the overpressure cylinder (3).

3. The casing preloading device for a throttle cable bend according to claim 2, characterized in that: The upper mold (4) has a mold groove (42), a curved limiting groove (43) is provided in the middle of the mold groove (42), a receiving groove (44) is provided in the curved limiting groove (43), and a through hole (45) is provided at the bottom of the receiving groove (44) penetrating the upper mold (4).

4. The casing preloading device for a throttle cable bend according to claim 3, characterized in that: The elastic support guide structure (5) comprises a movable rod (51) disposed through the through hole (45); a fixing block (52) is connected to the lower end of the movable rod (51); an arc-shaped support plate (53) is connected to the lower side of the fixing block (52); and a torsion spring structure (54) is connected between the fixing block (52) and the arc-shaped support plate (53).

5. The casing preloading device for a throttle cable bend according to claim 4, characterized in that: A limit seat (46) is fixedly connected to the upper mold (4), and a through hole is provided in the middle of the limit seat (46) for the movable rod (51) to pass through; A pressure ring (55) is also fixedly connected to the movable rod (51), and the pressure ring (55) is supported at the middle part of the upper side surface of the upper mold (4). A return spring (56) is provided on the outer periphery of the portion of the movable rod (51) located between the pressure ring (55) and the limiting seat (46).

6. The casing preloading device for the throttle cable bend according to claim 5, characterized in that: The clamping guide assembly (9) comprises symmetrically arranged rotating plates (91), and the upper guide body (10) is located between the two rotating plates (91) and is fixedly connected to the two rotating plates (91); The upper guide body (10) has an upper arc-shaped guide groove (101).

7. The casing preloading device for a throttle cable bend according to claim 6, characterized in that: The lower ends of the two rotating plates (91) are fixedly connected via a bottom plate (92); a lifting cylinder (93) is provided on the bottom plate (92); and the lifting cylinder (93) is fixedly connected to the lower guide body (11); The lower guide body (11) has a lower arc-shaped guide groove (111).

8. The casing preloading device for a throttle cable bend according to claim 7, characterized in that: The sliding assembly (7) comprises a sliding connection plate (71), a vertical connection plate (72) and a mounting plate (73); The sliding connection plate (71) has a threaded hole (711) and a limiting slider (712); the frame structure (2) is provided with a slide groove (47) that matches the sliding connection plate (71) and the limiting slider (712); the threaded hole (711) is threadedly matched with a threaded rod (48); one end of the threaded rod (48) extends into the slide groove (47) and is rotatably mounted in the slide groove (47); and one end of the threaded rod (48) located outside the slide groove (47) is connected to a motor (49).

9. The casing preloading device for a throttle cable bend according to claim 8, characterized in that: The sliding connection plate (71), the vertical connection plate (72) and the mounting plate (73) are integrally formed; The rotating assembly (8) is a rotating motor mounted on the mounting plate (73); the rotating shaft of the rotating motor passes through the vertical connecting plate (72) and is fixedly connected to the rotating plate (91); the rotating motor drives the rotating plate (91) to rotate.

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