A high and low temperature rubber bending test machine

Abstract

The present invention belongs to the technical field of bending test equipment, and discloses a high and low temperature rubber bending tester, comprising an outer shell, wherein two supporting vertical plates symmetrically distributed front and back are fixedly connected inside the outer shell, and two rotatably connected bending and swinging mechanisms are connected between the supporting vertical plates, wherein one of the bending and swinging mechanisms is fixedly connected to the outer shell, and the other bending and swinging mechanism is fixedly connected to a rotating shaft rod, which is rotatably connected to the supporting vertical plates, and the rotating shaft rod is connected to an external driving device, and the bending and swinging mechanism comprises a telescopic sleeve rod, and the telescopic sleeve rod is fixedly connected to a bending frame at one end away from the supporting vertical plates, and a fixed ring plate is fixedly connected to the bending frame, and a plurality of sliding rails with equal circumferential distribution are provided on the fixed ring plate, and a sliding block is slidably connected inside the sliding rail, and a fastening rod is fixedly connected to the end of the sliding block close to the supporting vertical plates, and a plurality of supporting blocks are fixedly connected to the fastening rod, and an air supply cylinder is coaxially fixedly connected to the axial position of the fixed ring plate; and the present invention has strong practicality.

Description

Technical Field

[0001] The invention relates to the technical field of bending test equipment, in particular to a high and low temperature rubber bending test machine. Background Art

[0002] During the automobile manufacturing process, during the installation of the wiring harness on the door, a rubber tube needs to be installed to protect the wiring harness to avoid the problem of line failure caused by wear of the wiring harness. At the same time, since the rubber tube is installed near the door, the rubber tube will bend with the opening and closing of the door during the opening and closing of the door. Therefore, the bending performance requirements of the rubber tube are very high to avoid the rubber tube from breaking. In order to ensure the bending performance of the rubber tube, it is particularly important to perform a bending test on the rubber tube. During the bending test of the rubber tube, in order to verify the high temperature or low temperature resistance of the rubber tube, when performing the bending test on the rubber tube, the temperature of the rubber tube during the bending process needs to be adaptively adjusted to achieve the purpose of testing the bending performance of the rubber tube under different temperature conditions.

[0003] A Chinese patent with application number CN202222980824.2 discloses an angle-adjustable bending resistance testing machine. In the above patent document, when it is necessary to perform a bending resistance test on the sheet to be tested, one end of the sheet to be tested is first placed on a lifting plate, and the other end of the sheet to be tested is fixed on a bending pressure block by glue or a clamp; then, the driving component drives the bending pressure block to reciprocate relative to the lifting plate through a rotating frame. During the rotation of the bending pressure block, the sheet to be tested will be repeatedly bent, thereby realizing a mechanized bending resistance test of the sheet to be tested, thereby improving production efficiency.

[0004] The Chinese patent application number CN202011597508.6 discloses a high and low temperature bending test device for pipes. This application combines high and low temperature cycle tests and bending fatigue tests. Compared with traditional testing methods, it not only has a short test cycle, but also can reflect the actual performance of the pipe. At the same time, the test conditions of the test device are controllable, the operation is simple, and the test process is stable. The guide rod is provided to ensure that the pipe can be bent 90°. The guide rod is provided with a slot to ensure that the pipe will not deviate from the position, the two pipes will be entangled and overlapped, or slip during the bending test. This not only improves the test efficiency of the test device, but also ensures the stability and reliability of the test data. The locking block is provided with a mounting hole for installing the pipe, and the pipe is limited by the mounting hole, which can ensure that the pipe will not deviate on the locking block during the bending test. By designing different gradients on the guide rod and the roller, pipe products with different outer diameters can be tested at the same time, improving the test efficiency and versatility of the test device. However, the following problems still exist in actual applications, specifically:

[0005] 1. During the bending test of the rubber tube, due to the different inner diameters of the rubber tube, the support of the rubber tube will be unstable, and the rubber tube will shake or even fall off, resulting in the interruption of the test;

[0006] 2. In the bending test process of rubber tubes, most of them use the temperature adjustment of the surrounding environment to ensure the temperature of the rubber tube test. It is necessary to change the temperature of the surrounding environment in a large range, which wastes energy. At the same time, the change of the surrounding temperature, too high or too low temperature will also affect the replacement of the rubber tube, making it inconvenient for the staff to operate;

[0007] 3. Since different rubber tubes have different lengths and apertures, the bending positions are also different. Rubber tubes with different inner diameters and lengths need to be supported and fixed. At the same time, the heating or cooling area of ​​the rubber tube needs to be adaptively adjusted according to the length of the rubber tube.

[0008] Therefore, the present invention provides a high and low temperature rubber bending tester to solve the above problems. Summary of the invention

[0009] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a high and low temperature rubber bending testing machine, which effectively solves the problems of adjusting the temperature of the bending position of the rubber tube, reducing energy consumption, providing limited support for rubber tubes with different lengths and inner diameters, and adaptively adjusting the temperature change area.

[0010] The present invention comprises a shell, wherein two supporting vertical plates symmetrically distributed front and back are fixedly connected inside the shell, and two rotatably connected bending and swinging mechanisms are connected between the supporting vertical plates, wherein one of the bending and swinging mechanisms is fixedly connected to the shell, and the other bending and swinging mechanism is fixedly connected to a rotating shaft rod, wherein the rotating shaft rod is rotatably connected to the supporting vertical plates, and the rotating shaft rod is connected to an external driving device;

[0011] The bending and swinging mechanism comprises a telescopic sleeve rod, the end of the telescopic sleeve rod away from the supporting vertical plate is fixedly connected to a bending frame, the bending frame is fixedly connected to a fixed ring plate, the fixed ring plate is provided with a plurality of sliding rails with equal circumference distribution, the sliding rails are slidably connected to sliding blocks, the sliding blocks are fixedly connected to a fastening rod at one end close to the supporting vertical plate, the fastening rods are fixedly connected to a plurality of supporting blocks, and the fixed ring plate is coaxially fixedly connected to an air supply cylinder at the axial position;

[0012] The sliding block is fixedly connected with a driving slide at one end away from the supporting vertical plate, and an arc-shaped slide groove is provided on the driving slide. The outer wall of the air supply cylinder is coaxially rotatably connected with a driving disk, and one end of the driving disk close to the arc-shaped slide groove is fixedly connected with a driving pin that matches the arc-shaped slide groove. The driving disk is coaxially fixedly connected with a driving sleeve, and a spiral track is provided on the driving sleeve. The outer wall of the driving sleeve is coaxially slidably connected with a sliding sleeve, and the inner wall of the sliding sleeve is fixedly connected with a sliding pin that matches the spiral track. The sliding sleeve is fixedly connected with a sliding push rod, and the sliding push rod is connected to an external driving device.

[0013] A plurality of heating wires with equal circumferential distribution are fixedly connected inside the air supply cylinder, and an air intake pipe is fixedly connected to one end of the air supply cylinder away from the supporting vertical plate, and the air intake pipe is connected to an external air supply device.

[0014] Preferably, the rotating shaft is hollow, the inner wall of the rotating shaft is provided with a spiral rotating rail, the rotating shaft axis is coaxially slidably connected with a sliding adjustment rod, the sliding adjustment rod is coaxially fixedly connected with a sliding plate, the sliding adjustment rod is fixedly connected with a rotating driving pin that cooperates with the spiral rotating rail, the sliding adjustment rod is fixedly connected with a pushing sleeve rod at one end of the sliding adjustment rod away from the supporting vertical plate, the pushing sleeve rod is threadedly connected to an adjusting screw rotatably connected to the supporting vertical plate, the adjusting screw is connected to a driving motor fixedly connected to the supporting vertical plate, the driving motor is connected to a control template fixedly connected to the outer shell, and a control unit is integrated inside the control template.

[0015] Preferably, the air supply cylinder is coaxially slidably connected to a telescopic tube, a plurality of air holes are provided on the telescopic tube, the telescopic tube is placed at one end of the air supply cylinder and is coaxially fixedly connected to a sealing sliding disk that fits the inner wall of the air supply cylinder, a pressure air intake structure is fixedly connected to the sealing sliding disk, the pressure air intake structure includes an air intake sleeve fixedly connected to the telescopic tube, a conical air intake hole is provided at the axial center of the air intake sleeve, a conical sealing valve is coaxially slidably connected to the conical air intake hole, and a pressure spring is connected between the conical sealing valve and the air intake sleeve.

[0016] Preferably, the air supply cylinder is coaxially slidably connected with a limit ring, the limit ring is fixedly connected with a sliding screw slidably connected to the air supply cylinder, the sliding screw is threadedly connected to a rotating threaded sleeve rotatably connected to the air supply cylinder, the rotating threaded sleeve is coaxially fixedly connected with an adjusting gear, the outer wall of the air supply cylinder is rotatably connected with a rotating adjustment sleeve, the rotating adjustment sleeve is coaxially fixedly connected with a rotating gear ring meshing with the adjusting gear, the rotating adjustment sleeve is coaxially fixedly connected with a rotating gear at one end away from the supporting vertical plate, an adjusting pinion is meshed next to the rotating gear, the adjusting pinion is rotatably connected to the fixed ring plate, and the adjusting pinion is connected to a limit adjustment mechanism connected to the telescopic sleeve.

[0017] Preferably, the telescopic sleeve rod includes a primary sleeve rod connected to the supporting vertical plate, a telescopic secondary rod is slidably connected inside the primary sleeve rod, one end of the telescopic secondary rod is placed on the primary sleeve rod and is fixedly connected to a sliding piston, one end of the primary sleeve rod close to the supporting vertical plate is fixedly connected to a liquid inlet pipe, the liquid inlet pipe is connected to a pressure supply pump connected to the inside of the shell through a conduit, and the telescopic secondary rod and the primary sleeve rod are connected by a strong spring.

[0018] Preferably, the limit adjustment mechanism comprises a transfer sprocket rotatably connected to the bending frame, the transfer sprocket and the adjustment pinion are connected via a chain transmission mechanism, the transfer sprocket is connected to a limit shaft rotatably connected to the telescopic secondary rod via a bevel gear reversing transmission mechanism, and the limit shaft is coaxially fixedly connected with an adjustment sprocket;

[0019] The support vertical plates are all rotatably connected with electric control sprockets, the primary sleeve rods are all fixedly connected with lifting sliding frames, the lifting sliding frames are internally slidably connected with sliding disks, the sliding disks and the lifting sliding frames are connected by springs, the sliding disks are rotatably connected with sliding sprockets, the electric control sprockets, the sliding sprockets and the adjusting sprockets are connected by chains, and the electric control sprockets are connected with external driving mechanisms;

[0020] The electrically controlled sprocket comprises a rotating sleeve, the outer wall of the rotating sleeve is coaxially rotatably connected with a rotating sprocket, a limiting rail is provided on the rotating sleeve, a limiting groove matching with the limiting rail is provided on the inner wall of the rotating sprocket, an electromagnet is fixedly connected inside the limiting rail, a sliding limiting block is slidably connected inside the limiting rail, and the electromagnet is externally connected to a power supply.

[0021] Preferably, the rotating sleeves are coaxially fixedly connected with connecting sprockets, a connecting rod is rotatably connected between the two supporting vertical plates, the connecting sprockets are connected to the connecting rods through a chain transmission mechanism, and the connecting rods are connected to an adjusting motor connected to the inside of the outer shell.

[0022] Preferably, the sliding push rod is connected to a push plate, the pushing plate is fixedly connected to a sliding screw that is slidably connected to the bending frame, the sliding screw is slidably connected to a polygonal limit rod fixedly connected to the bending frame, the bending frame is rotatably connected to a rotating drive sleeve that is threadedly connected to the sliding screw, the rotating drive sleeve is coaxially fixedly connected to a rotating drive gear, the rotating drive gear is meshed with a sliding rack that is slidably connected to the bending frame, the sliding rack is fixedly connected to a hydraulic telescopic rod connected to the bending frame, and the hydraulic telescopic rods are all connected to an oil supply pump connected to the outer shell.

[0023] Preferably, a telescopic ratio adjustment structure is connected between the sliding push rod and the push plate, and the telescopic ratio adjustment structure includes a primary sleeve fixedly connected to the inside of the bending frame, a primary piston rod fixedly connected to the push plate is slidably connected inside the primary sleeve, a secondary sleeve is fixedly connected to one end of the primary sleeve close to the sliding push rod, and the sliding push rod is placed inside the secondary sleeve and fixedly connected to one end of the secondary piston that cooperates with the secondary sleeve.

[0024] The present invention improves the existing heat exchanger and has the following beneficial effects:

[0025] 1. The problem of supporting and limiting rubber tubes with different inner diameters is effectively solved by setting structures such as fixed ring plates, sliding rails, sliding blocks, fastening rods, support blocks, driving slide plates, arc-shaped slide grooves, driving discs, driving pins, driving sleeves, and sliding sleeves;

[0026] 2. By setting up the telescopic sleeve rod, air supply cylinder, telescopic tube, pressure air intake structure, limit ring, sliding screw, rotating adjustment sleeve and other structures, the problem of supporting rubber tubes of different lengths and adjusting the temperature of the bending area of ​​rubber tubes of different lengths is effectively solved;

[0027] 3. The problem of controlling and adjusting the bending angle is effectively solved by setting structures such as spiral rotating rails, sliding adjustment rods, sliding plates, rotating driving pins, pushing sleeve rods, and adjusting screws;

[0028] 4. The problem of synchronously adjusting the length of two telescopic rods is effectively solved by setting structures such as a transfer sprocket, an adjusting pinion, an electric control sprocket, a sliding sprocket and a connecting shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0030] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0031] Figure 3 A three-dimensional diagram of the bending and swinging mechanism of the present invention Figure 1 .

[0032] Figure 4 For the present invention Figure 3 A partial enlarged schematic diagram in the middle.

[0033] Figure 5 It is a schematic diagram of the internal structure of the air supply cylinder and its connecting parts of the present invention.

[0034] Figure 6 For the present invention Figure 5 A partial enlarged schematic diagram of point B in the middle.

[0035] Figure 7 A three-dimensional diagram of the bending and swinging mechanism of the present invention Figure 2 .

[0036] Figure 8 It is a schematic diagram of the sliding sleeve driving mechanism of the present invention.

[0037] Fig. 9 It is a schematic diagram of the telescopic ratio adjustment structure of the present invention.

[0038] Fig.10 It is a schematic diagram of the limit ring and its connecting parts of the present invention.

[0039] Fig.11 It is a schematic diagram of the air supply cylinder and its connecting parts of the present invention.

[0040] Fig.12 For the present invention Fig.11 A partial enlarged schematic diagram of point C in the middle.

[0041] Fig.13 It is a schematic diagram of the structure of the electronically controlled sprocket of the present invention.

[0042] Fig.14 It is a schematic diagram of the rotating shaft driving structure of the present invention.

[0043] 1. outer shell; 2. support vertical plate; 3. rotating shaft rod; 4. telescopic sleeve rod; 5. bending frame; 6. fixed ring plate; 7. sliding rail; 8. sliding block; 9. fastening rod; 10. support block; 11. air supply cylinder; 12. driving slide plate; 13. arc slide groove; 14. driving plate; 15. driving sleeve; 16. spiral track; 17. sliding sleeve; 18. sliding push rod; 19. heating wire; 20. air inlet pipe; 21. spiral rotating rail; 22. sliding adjustment rod; 23. sliding plate; 24. pushing sleeve rod; 25. adjusting screw; 26. driving motor; 27. telescopic tube; 28. air vent; 29. ​​sealing sliding plate; 30. air inlet sleeve; 31. conical air inlet hole; 32. conical sealing valve; 33. pressure spring; 34. limiting ring; 35. sliding screw; 36. rotating threaded sleeve; 3 7. Adjusting gear; 38. Rotating adjusting sleeve; 39. Rotating gear ring; 40. Rotating gear; 41. Adjusting pinion; 42. Primary sleeve rod; 43. Telescopic secondary rod; 44. Sliding piston; 45. Liquid inlet pipe; 46. Transfer sprocket; 47. Limiting shaft; 48. Adjusting sprocket; 50. Lifting sliding frame; 51. Sliding plate; 52. Sliding sprocket; 53. Rotating sleeve; 54. Rotating sprocket; 55. Limiting rail; 56. Limiting groove; 57. Electromagnet; 58. Sliding limiting block; 59. Connecting sprocket; 60. Connecting rod; 61. Push plate; 62. Sliding screw rod; 63. Polygonal limiting rod; 64. Rotating driving sleeve; 65. Rotating driving gear; 66. Sliding rack; 67. Hydraulic telescopic rod; 68. Primary sleeve; 69. Primary piston rod; 70. Secondary sleeve; 71. Secondary piston. DETAILED DESCRIPTION

[0044] The above and other technical contents, features and effects of the present invention are described in detail below with reference to the attached Figures 1 to 14 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0045] Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0046] The present invention is a high and low temperature rubber bending tester, comprising an outer shell 1, wherein the outer shell 1 provides a fixed support foundation for subsequent structures and ensures the stability of the test environment. Two support vertical plates 2 symmetrically distributed front and back are fixedly connected inside the outer shell 1, and the support for the subsequent structure is achieved through the support vertical plates 2, which is convenient for the subsequent structure to perform bending tests. Two rotatably connected bending and swinging mechanisms are connected between the support vertical plates 2, one of the bending and swinging mechanisms is fixedly connected to the outer shell 1, and the bending and swinging mechanism fixedly connected to the outer shell 1 is placed horizontally, and the other bending and swinging mechanism is fixedly connected to a rotating shaft rod 3, and the rotating shaft rod 3 is rotatably connected to the support vertical plate 2, and the rotating shaft rod 3 is connected to an external driving device. The two bending and swinging mechanisms are rotatably connected, and the bending test of the rubber tube is achieved through the relative rotation of the two bending and swinging mechanisms.

[0047] The bending and swinging mechanism includes a telescopic sleeve rod 4, which is connected to the supporting vertical plate 2. The telescopic sleeve rod 4 is fixedly connected to a bending frame 5 at one end away from the supporting vertical plate 2. A fixed ring plate 6 is fixedly connected to the bending frame 5. The fixed ring plate 6 is provided with a plurality of sliding rails 7 with equal circumferential distribution. The sliding rail 7 is slidably connected to a sliding block 8. The sliding block 8 slides in the sliding rail 7 to realize the synchronous sliding of the plurality of sliding blocks 8. The sliding blocks 8 are fixedly connected to a tightening member at one end close to the supporting vertical plate 2. The fixing rod 9 drives the synchronous sliding of several fastening rods 9 during the synchronous sliding process of the sliding block 8, thereby realizing the adjustment of the distance between the fastening rods 9, thereby realizing the effective support and fixation of the rubber tubes with different apertures. Several supporting blocks 10 are fixedly connected to the fastening rods 9, and the support of the inner wall of the rubber tube is realized by the supporting blocks 10. The axial position of the fixing ring plate 6 is coaxially fixedly connected with an air supply cylinder 11, and the interior of the rubber tube is inflated by the air supply cylinder 11, so that the high and low temperature airflow from the outside is supplied into the interior of the rubber tube.

[0048] The sliding block 8 is fixedly connected to a driving slide 12 at one end away from the supporting vertical plate 2, and the sliding of the driving slide 12 is used to drive the sliding block 8 to slide synchronously. The driving slide 12 is provided with an arc-shaped slide groove 13, and the outer wall of the air supply cylinder 11 is coaxially connected to a driving disk 14. The driving disk 14 is fixedly connected to a driving pin that cooperates with the arc-shaped slide groove 13 at one end close to the arc-shaped slide groove 13. During the rotation of the driving disk 14, the driving pin is driven to rotate synchronously. At the same time, during the rotation of the driving pin, due to the cooperation between the driving pin and the arc-shaped slide groove 13, the driving slide 12 drives the sliding block 8 to slide inside the sliding rail 7, thereby realizing the adjustment of the position of the fastening rod 9, ensuring that the fastening rod 9 is fixed to the The rubber sleeve is effectively supported and limited. The driving disk 14 is coaxially fixedly connected with the driving sleeve 15. The rotation of the driving sleeve 15 drives the driving disk 14 to rotate synchronously. A spiral track 16 is provided on the driving sleeve 15. The outer wall of the driving sleeve 15 is coaxially slidably connected with a sliding sleeve 17. The inner wall of the sliding sleeve 17 is fixedly connected with a sliding pin that matches the spiral track 16. Under the cooperation of the sliding pin and the spiral track 16, the sliding sleeve 17 slides and drives the driving sleeve 15 to rotate, thereby adjusting the position of the fastening rod 9 and supporting and limiting the rubber tube. The sliding sleeve 17 is fixedly connected with a sliding push rod 18. The sliding push rod 18 is connected to an external driving device, and the sliding of the sliding push rod 18 drives the synchronous sliding of the sliding sleeve 17.

[0049] The air supply cylinder 11 is internally fixedly connected with a plurality of equicircumferentially distributed heating wires 19, and the air supply cylinder 11 is fixedly connected with an air intake pipe 20 at one end away from the support vertical plate 2. The air intake pipe 20 is connected to an external air supply device, and the air supply to the air supply cylinder 11 is achieved through the air intake pipe 20. At the same time, the airflow entering the air supply cylinder 11 is heated through the heating wires 19 to ensure the temperature inside the rubber tube and adjust the bending test temperature of the rubber tube. It should be noted that a limiting support rod is connected between the two support vertical plates 2, and the limiting support rod is located directly above the rotating shaft 3. The rubber tube is limited by the limiting support rod to ensure that the rubber tube can be bent around the limiting support rod.

[0050] During the specific implementation of this embodiment, in the initial state, the two bending and swinging mechanisms are both in a horizontal state, and then the rubber tube is sleeved on the two bending and swinging mechanisms, and then the driving device of the sliding push rod is started, and then the sliding of the sliding block 8 is achieved through the sliding sleeve 17, the spiral track 16, the sliding pin, the driving sleeve 15, and the driving disk 14, and then the position of the fastening rod 9 is adjusted, and the inner wall of the rubber tube is supported and limited through the fastening rod 9 to prevent the rubber tube from falling off, and then the heating wire 19 and the external air supply device are started to change the temperature inside the rubber tube, and a temperature sensor is connected to the air supply cylinder 11 to monitor the internal temperature of the rubber tube, and at the same time, the driving device of the rotating shaft 3 is started, and the reciprocating rotation of the rotating shaft 3 is used to achieve the reciprocating swing of the rotating bending and swinging mechanism, and then the bending test of the rubber tube is achieved. After a certain number of bending experiments, the bending performance of the rubber tube is tested.

[0051] In order to facilitate the adjustment of the bending angle of the bending test and ensure the effective control of the rotation angle of the rotating shaft rod 3, a structure is provided to drive the rotation angle of the rotating shaft rod 3 and lock the rotating shaft rod 3. Specifically, the rotating shaft rod 3 is hollow, and a spiral rotating rail 21 is provided on the inner wall of the rotating shaft rod 3. A sliding adjustment rod 22 is coaxially slidably connected to the axis of the rotating shaft rod 3. The sliding adjustment rod 22 is coaxially fixedly connected to a sliding plate 23. A rotating driving pin matching the spiral rotating rail 21 is fixedly connected to the sliding adjustment rod 22. The sliding process of the sliding adjustment rod 22 drives the sliding plate 23 and the rotating driving pin to slide synchronously. During the sliding process of the rotating driving pin, the rotating shaft rod 3 rotates under the limiting action of the rotating driving pin and the spiral rotating rail 21, and the rotating shaft rod 3 rotates to drive the corresponding telescopic sleeve rod 4 The sliding adjustment rod 22 is fixedly connected with a push sleeve rod 24 at one end away from the support vertical plate 2. The sliding process of the push sleeve rod 24 drives the sliding adjustment rod 22 to slide synchronously. The push sleeve rod 24 is threadedly connected to the adjusting screw 25 rotatably connected to the support vertical plate 2. The adjusting screw 25 is connected to a driving motor 26 fixedly connected to the support vertical plate 2. The driving motor 26 is connected to a control template fixedly connected to the housing 1. A control unit is integrated inside the control template. The control module is used to control the driving motor 26, thereby controlling the forward and reverse rotation of the driving motor 26 and the forward and reverse rotation cycle. The rotation process of the adjusting screw 25 drives the sliding of the push sleeve rod 24, thereby realizing the sliding of the sliding adjustment rod 22, thereby ensuring the effective driving of the rotating shaft 3.

[0052] In order to ensure effective air supply to the middle position of the rubber tube and to ensure the temperature of the bending part of the rubber tube, a structure for adjusting the temperature of the middle position of the rubber tube is provided. Specifically, a telescopic tube 27 is coaxially slidably connected inside the air supply cylinder 11. The adjustment of the air supply position inside the rubber tube is achieved by sliding the telescopic tube 27. A plurality of air holes 28 are provided on the telescopic tube 27. The air flow is discharged to the inside of the rubber tube through the air holes 28. The telescopic tube 27 is placed at one end of the air supply cylinder 11 and is coaxially fixedly connected to the inner wall of the air supply cylinder 11. The sealing sliding disk 29 is fitted, and the sealing sliding disk 29 slides in the air supply cylinder 11, driving the telescopic tube 27 to slide synchronously in the air supply tube. The sealing sliding disk 29 is fixedly connected with a pressure air intake structure inside. The pressure air intake structure ensures that after the telescopic tube 27 slides to the corresponding position, the pressure air intake structure is opened to supply air to the inside of the rubber tube. The pressure air intake structure includes an air intake sleeve 30 fixedly connected to the telescopic tube 27. The air intake sleeve 30 is provided with a conical air intake hole 31 at the axis center. The conical air intake hole 31 has a coaxial sliding The conical sealing valve 32 is dynamically connected to the air supply cylinder 11, and a pressure spring 33 is connected between the conical sealing valve 32 and the air intake sleeve 30. When the air is supplied to the air supply cylinder 11, the pressure does not overcome the action of the pressure spring 33, and the conical sealing valve 32 drives the air intake sleeve 30 and the telescopic tube 27 to slide synchronously. When the telescopic tube 27 slides to the farthest end, the air supply cylinder 11 continues to supply air, and the conical sealing plug and the air intake sleeve 30 slide relative to each other, so that the airflow enters the interior of the telescopic tube 27 through the conical air inlet hole 31 and enters the The airflow inside the telescopic tube 27 enters the vicinity of the middle bending position of the rubber tube through the air vent 28 to adjust the bending temperature. At the same time, when low temperature testing is required, the heating wire 19 is turned off, and the gas entering the air inlet pipe 20 is cooled by an external refrigeration device to ensure that the inside of the rubber tube is in a low temperature environment, thereby saving resources, reducing energy consumption, and changing the local temperature of the rubber tube. At the same time, it is also convenient to disassemble the rubber tube, and there is no need to wait for cooling or heating treatment due to the ambient temperature being too high or too low before the rubber tube can be disassembled.

[0053] Since the lengths of the rubber tubes are different, and in order to prevent the telescopic tube 27 from sliding to the bending position of the rubber tube and affecting the overall bending effect, a structure is provided for limiting and adjusting the telescopic length of the telescopic tube 27 according to the length of the rubber tube. Specifically, a limit ring 34 is coaxially slidably connected inside the air supply cylinder 11, and the limit ring 34 is fixedly connected to a sliding screw 35 slidably connected to the air supply cylinder 11. The sliding process of the sliding screw 35 drives the limit ring 34 to slide synchronously, thereby realizing the position adjustment of the limit ring 34, and then the sliding distance of the telescopic tube 27 is limited by the limit ring 34, so as to realize the adjustment of the telescopic length of the telescopic rod to meet different needs. The sliding screw 35 is threadedly connected to a rotating threaded sleeve 36 rotatably connected to the air supply cylinder 11, and the rotating threaded sleeve 36 is coaxially fixedly connected to an adjusting gear 37. The rotation of the segment gear 37 drives the rotating threaded sleeve 36 to rotate synchronously, the outer wall of the air supply cylinder 11 is rotatably connected with a rotating adjustment sleeve 38, and the rotating adjustment sleeve 38 is coaxially fixedly connected with a rotating gear ring 39 meshing with the adjusting gear 37. The rotating adjustment sleeve 38 drives the rotating gear ring 39 to rotate synchronously while rotating, and the rotating gear ring 39 drives the adjusting gear 37 during its rotation. The rotating adjustment sleeve 38 is coaxially fixedly connected with a rotating gear 40 at one end away from the supporting vertical plate 2, and an adjusting pinion 41 is meshed next to the rotating gear 40. The rotating gear 40 is driven by the rotation of the adjusting pinion 41. The adjusting pinion 41 is rotatably connected to the fixed ring plate 6, and the adjusting pinion 41 is connected to a limit adjustment mechanism connected to the telescopic sleeve rod 4, and the adjusting pinion 41 is driven by the limit adjustment mechanism.

[0054] Due to the different lengths of rubber tubes, in order to adapt to rubber tubes of different lengths and facilitate effective position limiting support for different rubber tubes, the telescopic sleeve rod 4 includes a primary sleeve rod 42 connected to the support vertical plate 2, and a telescopic secondary rod 43 is slidably connected inside the primary sleeve rod 42. The telescopic secondary rod 43 is placed on one end of the primary sleeve rod 42 and is fixedly connected to a sliding piston 44. The primary sleeve rod 42 is fixedly connected to one end of the support vertical plate 2 with a liquid inlet pipe 45, and the liquid inlet pipe 45 is connected to a pressure supply pump connected to the inside of the shell 1 through a conduit. The telescopic secondary rod 43 and the primary sleeve rod 42 are connected by a strong spring, and the pressure supply inside the primary sleeve rod 42 is realized by the pressure supply pump, thereby realizing the telescopic drive of the telescopic secondary rod 43, thereby ensuring that the bending and swinging mechanism can realize the support and position limiting of rubber tubes of different lengths.

[0055] In order to facilitate the synchronous adjustment of the adjusting pinions 41 on both sides and ensure the synchronous adjustment of the two groups of telescopic tubes 27, the limit adjustment mechanism includes a transfer sprocket 46 rotatably connected to the bending frame 5, the transfer sprocket 46 and the adjusting pinion 41 are connected through a chain transmission mechanism, the transfer sprocket 46 is connected to a limit shaft 47 rotatably connected to the telescopic secondary rod 43 through a bevel gear reversing transmission mechanism, an adjusting sprocket 48 is coaxially fixedly connected to the limit shaft 47, the adjusting sprocket 48 rotates, and the adjusting pinion 41 is driven to rotate through the limit shaft 47, the bevel gear reversing structure, and the chain transmission mechanism, thereby realizing the driving of the rotating gear 40 and the rotating adjustment sleeve 38.

[0056] In order to effectively adjust the telescopic length of the telescopic tube 27 when meeting the telescopic requirements of the telescopic secondary rod 43, a structure for effectively driving the adjusting pinion 41 is provided. Specifically, the support vertical plate 2 is rotatably connected with an electric-controlled sprocket 49, and the primary sleeve rod 42 is fixedly connected with a lifting slide frame 50. The lifting slide frame 50 is internally slidably connected with a sliding plate 51. The sliding plate 51 and the lifting slide frame 50 are connected by a spring. The sliding plate 51 is rotatably connected with a sliding sprocket 52. The sliding plate 51 slides inside the lifting slide frame 50. The sliding process of the sliding disk 51 drives the sliding sprocket 52 to slide synchronously. The lifting sliding frame 50 and the electric control sprocket 49, the sliding sprocket 52 and the adjusting sprocket 48 are connected by a chain. The rotation of the electric control sprocket 49 drives the sliding sprocket 52 and the adjusting sprocket 48 to rotate synchronously. At the same time, in the process of adjusting the telescopic length of the telescopic secondary rod 43, the sliding sprocket 52 slides up and down, thereby ensuring the transmission stability of the electromagnetic sprocket, the sliding sprocket 52 and the adjusting sprocket 48. The electric control sprocket 49 is connected to an external driving mechanism, and the driving of the electric control sprocket 49 is realized by the external driving mechanism.

[0057] In the process that the primary sleeve rod 42 rotates around the supporting vertical rod, there will be a problem that the electrically controlled sprocket 49, the sliding sprocket 52 and the adjusting sprocket 48 rotate slightly. Therefore, in order to ensure the stability of the telescopic tube 27, a structure for controlling the rotation of the electrically controlled sprocket 49 is provided. Specifically, the electrically controlled sprocket 49 includes a rotating sleeve 53, and the rotating sleeve 53 is rotatably connected to the supporting vertical plate 2. The outer wall of the rotating sleeve 53 is coaxially rotatably connected with a rotating sprocket 54, and the rotating sprocket 54 can be rotatably connected around the rotating sleeve 53. A limiting rail 55 is provided on the rotating sleeve 53, and a limiting groove 56 matching the limiting rail 55 is provided on the inner wall of the rotating sprocket 54. The limiting rail 55 is fixedly connected to the inner wall of the limiting rail 55. An electromagnet 57 is connected, and a sliding limit block 58 is slidably connected inside the limit rail 55. The electromagnet 57 is externally connected to a power supply. The sliding limit block 58 and the limit rail 55 are connected by a spring. When the sliding limit block 58 slides into the limit groove 56, the rotating sleeve 53 rotates to drive the rotating sprocket 54 to rotate synchronously. At the same time, when the electromagnet 57 is energized, the sliding limit block 58 is received inside the limit rail 55 under the adsorption effect of the electromagnet 57, so that the rotating sprocket 54 can rotate freely around the rotating sleeve 53, avoiding the problem that the primary sleeve rod 42 rotates around the supporting vertical plate 2, which will drive the adjusting sprocket 48 and the sliding sprocket 52 to rotate slightly.

[0058] The rotating sleeves 53 are coaxially fixedly connected with connecting sprockets 59, and a connecting rod 60 is rotatably connected between the two supporting vertical plates 2. The connecting sprockets 59 are connected to the connecting rod 60 through a chain transmission mechanism. The connecting rod 60 is connected to an adjusting motor connected to the inside of the shell 1. The connecting rod 60 is driven to rotate by the adjusting motor. The rotation of the connecting rod 60 drives the two connecting sprockets 59 to rotate. The synchronous rotation of the two connecting sprockets 59 drives the rotating sleeve 53 to rotate synchronously, thereby realizing the synchronous adjustment of the telescopic length of the two telescopic tubes 27.

[0059] During the process of adjusting the position of the fastening rod 9 by the sliding of the sliding sleeve 17, due to the cooperation between the spiral track 16 and the sliding pin, the spiral track 16 and the sliding pin do not have a self-locking function. Therefore, during the rubber tube supporting process, the sliding sleeve 17 may slide slightly under the action of external pressure, which in turn causes the fastening rod 9 to be unable to effectively support and limit the rubber sleeve. Therefore, a structure for effectively locking the sliding sleeve 17 is provided. Specifically, the sliding push rod 18 is connected to a push plate 61, and the push plate 61 is fixedly connected to a sliding screw 62 that is slidably connected to the bending frame 5. The sliding screw 62 is slidably connected to a polygonal limiting rod 63 that is fixedly connected to the bending frame 5 to ensure that the sliding screw 62 slides along the bending frame 5. A rotating drive sleeve 64 that is threadedly connected to the sliding screw 62 is rotatably connected to the bending frame 5. The rotating drive sleeve 64 rotates to drive The sliding screw rod 62 slides, and the sliding process of the sliding screw rod 62 drives the sliding plate 61 to slide synchronously. The sliding process of the sliding plate 61 drives the sliding push rod 18 to slide synchronously, thereby realizing the driving of the sliding sleeve 17. The rotating drive sleeve 64 is coaxially fixedly connected with a rotating drive gear 65. The rotation of the rotating drive gear 65 drives the rotating drive sleeve 64 to rotate synchronously. The rotating drive gear 65 is meshed with a sliding rack 66 that is slidably connected to the bending frame 5. The reciprocating sliding process of the sliding rack 66 drives the rotating drive gear 65 to rotate reciprocally. The sliding rack 66 is fixedly connected to the hydraulic telescopic rod 67 connected to the bending frame 5. The reciprocating sliding process of the hydraulic telescopic rod 67 drives the sliding rack 66 to slide synchronously. The hydraulic telescopic rods 67 are connected to the oil supply pump connected to the housing 1, and the two hydraulic telescopic rods 67 are synchronously driven by the oil supply pump.

[0060] Since the sliding distance and amplitude of the sliding screw 62 are limited, in order to ensure the sliding distance of the sliding sleeve 17 and to ensure the effective support and limit of the rubber tube, a telescopic ratio adjustment structure is connected between the sliding push rod 18 and the push plate 61, and the telescopic ratio adjustment structure includes a primary sleeve 68 fixedly connected to the inside of the bending frame 5, and a primary piston rod 69 fixedly connected to the push plate 61 is slidably connected inside the primary sleeve 68, and the primary piston rod 69 slides inside the primary sleeve 68, and the primary sleeve 68 is fixedly connected to a secondary piston rod 69 near one end of the sliding push rod 18. Sleeve 70, the sliding push rod 18 is placed inside the secondary sleeve 70, and one end is fixedly connected with a secondary piston 71 that matches the secondary sleeve 70. During the sliding process of the primary piston rod 69, the hydraulic oil filled inside the primary sleeve 68 is pressed into the secondary sleeve 70, and at the same time, the sliding push rod 18 slides inside the secondary sleeve 70. Furthermore, the inner diameters of the primary sleeve 68 and the secondary sleeve 70 are in a certain proportion, ensuring that the primary piston rod 69 slides a smaller distance while the sliding push rod 18 slides a larger distance. The actual proportion is determined according to actual needs.

[0061] When the present invention is used in practice, in the initial state, the two bending and swinging mechanisms are both in a horizontal state. First, the telescopic length of the telescopic secondary rod 43 is adjusted to adapt to rubber tubes of different lengths. At the same time, the telescopic tube 27 is stored in the air supply cylinder 11, and then the rubber tube is sleeved on the two bending and swinging mechanisms. Then the pressure supply pump is started to drive the hydraulic telescopic rod 67, and then the sliding of the sliding block 8 is realized, so as to achieve the purpose of supporting and limiting the inner wall of the rubber tube through the fastening rod 9. Then the adjustment motor is started to adjust the telescopic length of the telescopic tube 27 so that the telescopic tube 27 extends into the vicinity of the bending position of the rubber tube. Then the heating wire 19 and the external air supply device are started to change the temperature inside the rubber tube. A temperature sensor is connected to the inside of the air supply cylinder 11 to monitor the temperature inside the rubber tube. At the same time, the driving device of the rotating shaft 3 is started. Through the reciprocating rotation of the rotating shaft 3, the reciprocating swing of the rotating bending and swinging mechanism is realized, and then the bending test of the rubber tube is realized. After a certain number of bending experiments, the bending performance of the rubber tube is detected.

[0062] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A high and low temperature rubber bending tester, comprising a housing (1), characterized in that: The shell (1) is internally fixedly connected to two support vertical plates (2) symmetrically distributed front and back, and two rotatably connected bending and swinging mechanisms are connected between the support vertical plates (2), one of the bending and swinging mechanisms is fixedly connected to the shell (1), and the other bending and swinging mechanism is fixedly connected to a rotating shaft (3), and the rotating shaft (3) is rotatably connected between the two support vertical plates (2), and the rotating shaft (3) is connected to an external driving device; The bending and swinging mechanism comprises a telescopic sleeve rod (4), the end of the telescopic sleeve rod (4) away from the supporting vertical plate (2) is fixedly connected to a bending frame (5), the bending frame (5) is fixedly connected to a fixed ring plate (6), the fixed ring plate (6) is provided with a plurality of sliding rails (7) distributed in equal circumferences, the sliding rails (7) are slidably connected to a sliding block (8), the sliding blocks (8) are fixedly connected to a fastening rod (9) at one end close to the supporting vertical plate (2), the fastening rod (9) is fixedly connected to a plurality of supporting blocks (10), and the fixed ring plate (6) is coaxially fixedly connected to an air supply cylinder (11) at an axial position; The sliding block (8) is fixedly connected to a driving slide (12) at one end away from the supporting vertical plate (2), and the driving slide (12) is provided with an arc-shaped slide groove (13). The outer wall of the air supply cylinder (11) is coaxially rotatably connected to a driving disk (14), and the end of the driving disk (14) close to the arc-shaped slide groove (13) is fixedly connected to a driving pin that matches the arc-shaped slide groove (13). The driving disk (14) is coaxially fixedly connected to a driving sleeve (15), and a spiral track (16) is provided on the driving sleeve (15). The outer wall of the driving sleeve (15) is coaxially slidably connected to a sliding sleeve (17), and the inner wall of the sliding sleeve (17) is fixedly connected to a sliding pin that matches the spiral track (16). The sliding sleeve (17) is fixedly connected to a sliding push rod (18), and the sliding push rod (18) is connected to an external driving device; The air supply cylinder (11) is internally fixedly connected with a plurality of heating wires (19) distributed in equal circumferences. The air supply cylinder (11) is fixedly connected with an air intake pipe (20) at one end away from the supporting vertical plate (2). The air intake pipe (20) is connected to an external air supply device. The rotating shaft (3) is hollow, and a spiral rotating rail (21) is provided on the inner wall of the rotating shaft (3). A sliding adjustment rod (22) is coaxially slidably connected to the axis of the rotating shaft (3). The sliding adjustment rod (22) is fixedly connected to a sliding plate (23). The sliding adjustment rod (22) is fixedly connected to the upper ends of the sliding plate (23). The lower end of the sliding plate (23) is fixedly connected to a push sleeve rod (24). The sliding adjustment rod (22) is fixedly connected to a rotating rod that matches the spiral rotating rail (21). The push sleeve (24) and the support vertical plate (2) on one side of the sliding plate (23) are slidably connected, and an adjusting screw (25) is rotatably connected to the support vertical plate on the other side. The push sleeve (24) and the adjusting screw (25) are threadedly connected, and the adjusting screw (25) is connected to a driving motor (26) fixedly connected to the support vertical plate (2), and the driving motor (26) is connected to a control template fixedly connected to the housing (1), and a control unit is integrated inside the control template; The air supply cylinder (11) is coaxially slidably connected to a telescopic tube (27) inside, and a plurality of air holes (28) are provided on the telescopic tube (27). The telescopic tube (27) is placed at one end of the air supply cylinder (11) and is coaxially fixedly connected to a sealing sliding disk (29) that fits the inner wall of the air supply cylinder (11). The sealing sliding disk (29) is internally fixedly connected to a pressure air intake structure, and the pressure air intake structure includes an air intake sleeve (30) fixedly connected to the telescopic tube (27). The air intake sleeve (30) is provided with a conical air intake hole (31) at the axis center. A conical sealing valve (32) is coaxially slidably connected to the conical air intake hole (31), and a pressure spring (33) is connected between the conical sealing valve (32) and the air intake sleeve (30); The air supply cylinder (11) is coaxially slidably connected with a limit ring (34), and the telescopic position of the telescopic tube (27) is limited by the limit ring (34). The limit ring (34) is fixedly connected with a sliding screw (35) slidably connected to the air supply cylinder (11). The sliding screw (35) is threadedly connected to a rotating threaded sleeve (36) rotatably connected to the air supply cylinder (11). The rotating threaded sleeve (36) is coaxially fixedly connected with an adjusting gear (37). The outer wall of the air supply cylinder (11) is rotatably connected to the air supply cylinder (11). A rotating adjustment sleeve (38) is connected, the rotating adjustment sleeve (38) is coaxially fixedly connected with a rotating gear ring (39) meshing with the adjusting gear (37), the rotating adjustment sleeve (38) is coaxially fixedly connected with a rotating gear (40) at one end away from the supporting vertical plate (2), an adjusting pinion (41) is meshed next to the rotating gear (40), the adjusting pinion (41) is rotatably connected to the fixed ring plate (6), and the adjusting pinion (41) is connected to a limit adjustment mechanism connected to the telescopic sleeve rod (4).

2. A high and low temperature rubber bending tester according to claim 1, characterized in that: The telescopic sleeve rod (4) comprises a primary sleeve rod (42) connected to the supporting vertical plate (2), a telescopic secondary rod (43) is slidably connected inside the primary sleeve rod (42), one end of the telescopic secondary rod (43) is fixedly connected to a sliding piston (44) disposed on the primary sleeve rod (42), one end of the primary sleeve rod (42) close to the supporting vertical plate (2) is fixedly connected to a liquid inlet pipe (45), the liquid inlet pipe (45) is connected to a pressure supply pump connected to the inside of the housing (1) through a conduit, and the telescopic secondary rod (43) and the primary sleeve rod (42) are connected via a strong spring.

3. A high and low temperature rubber bending tester according to claim 2, characterized in that: The limit adjustment mechanism comprises a transfer sprocket (46) rotatably connected to the bending frame (5), the transfer sprocket (46) and the adjustment pinion (41) are connected via a chain transmission mechanism, the transfer sprocket (46) is connected via a bevel gear reversing transmission mechanism to a limit shaft (47) rotatably connected to the telescopic secondary rod (43), and the limit shaft (47) is coaxially fixedly connected with an adjustment sprocket (48); The support vertical plates (2) are all rotatably connected to an electrically controlled sprocket coaxially sleeved on the periphery of the sliding adjustment rod (22); the primary sleeve rods (42) are all fixedly connected to a lifting sliding frame (50); a sliding disk (51) is slidably connected inside the lifting sliding frame (50); the sliding disk (51) and the lifting sliding frame (50) are connected via a spring; a sliding sprocket (52) is rotatably connected to the sliding disk (51); the electrically controlled sprocket, the sliding sprocket (52) and the adjustment sprocket (48) are connected via a chain; and the electrically controlled sprocket is connected to an external driving mechanism; The electrically controlled sprocket comprises a rotating sleeve (53), the outer wall of the rotating sleeve (53) is coaxially rotatably connected to a rotating sprocket (54), a limiting rail (55) is provided on the rotating sleeve (53), the inner wall of the rotating sprocket (54) is provided with a limiting groove (56) matched with the limiting rail (55), an electromagnet (57) is fixedly connected inside the limiting rail (55), a sliding limiting block (58) is slidably connected inside the limiting rail (55), and the sliding limiting block (58) and the limiting rail (55) are connected to each other. 55) are connected by a spring. When the sliding limit block (58) slides into the inside of the limit groove (56), the rotating sleeve (53) rotates to drive the rotating sprocket (54) to rotate synchronously. At the same time, when the electromagnet (57) is energized, the sliding limit block (58) is received in the inside of the limit rail (55) under the adsorption effect of the electromagnet (57), thereby allowing the rotating sprocket (54) to rotate freely around the rotating sleeve (53). The electromagnet (57) is externally connected to a power source.

4. A high and low temperature rubber bending tester according to claim 3, characterized in that: The rotating sleeves (53) are coaxially fixedly connected with connecting sprockets (59), and a connecting rod (60) is rotatably connected between the two supporting vertical plates (2). The connecting sprockets (59) are connected to the connecting rod (60) via a chain transmission mechanism, and the connecting rod (60) is connected to an adjusting motor connected to the inside of the housing (1).

5. The high and low temperature rubber bending tester according to claim 1, characterized in that: The sliding push rod (18) is connected to a push plate (61), the pushing plate (61) is fixedly connected to a sliding screw (62) slidably connected to the bending frame (5), the sliding screw (62) is slidably connected to a polygonal limit rod (63) fixedly connected to the bending frame (5), the bending frame (5) is rotatably connected to a rotating drive sleeve (64) threadedly connected to the sliding screw (62), the rotating drive sleeve (64) is coaxially fixedly connected to a rotating drive gear (65), the rotating drive gear (65) is meshed with a sliding rack (66) slidably connected to the bending frame (5), the sliding rack (66) is fixedly connected to a hydraulic telescopic rod (67) connected to the bending frame (5), and the hydraulic telescopic rod (67) is connected to an oil supply pump connected to the housing (1).

6. A high and low temperature rubber bending tester according to claim 5, characterized in that: A telescopic ratio adjustment structure is connected between the sliding push rod (18) and the push plate (61), and the telescopic ratio adjustment structure includes a primary sleeve (68) fixedly connected to the inside of the bending frame (5), a primary piston rod (69) fixedly connected to the push plate (61) is slidably connected inside the primary sleeve (68), a secondary sleeve (70) is fixedly connected to one end of the primary sleeve (68) close to the sliding push rod (18), and a secondary piston (71) matching the secondary sleeve (70) is fixedly connected to one end of the sliding push rod (18) placed inside the secondary sleeve (70).

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