Automatic tensioning device for synchronous belt

Abstract

The utility model discloses an automatic tensioning device for a synchronous belt, which comprises a synchronous wheel bottom plate, the synchronous belt is driven by a driving wheel and a driven wheel which are arranged on the synchronous wheel bottom plate, the automatic tensioning device further comprises a tensioning executing mechanism and a tensioning mechanism, the tensioning executing mechanism comprises a tensioning wheel, and the tensioning wheel is controlled to move on the synchronous wheel bottom plate through an air cylinder; the tensioning detection mechanism comprises a linear sensor and an air pressure sensor which are arranged on the synchronous wheel bottom plate and is used for detecting the tensioning force of the synchronous belt; the pneumatic control system is used for controlling the cylinder to move; the thrust of the air cylinder is calculated through the two pressure sensors, the belt tensioning force is calculated according to the trigonometric function of the linear sensor, the synchronous wheel and the tensioning wheel, and when the system tensioning force is separated from the reasonable tensioning force range, the tensioning force can be adjusted to be within the reasonable range in real time, and the tensioning force is adjusted to be stable. The tensioning force of the synchronous belt can be adjusted under the non-stop condition, and the problem that the load capacity is affected due to the fact that the synchronous belt slips is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to synchronous belt technical field especially, it is an automatic tensioner for synchronous belt. BACKGROUND

[0002] SPT robot is a kind of automatic tensioner for synchronous belt using synchronous belt to drag the carrier plate arranged with soft target, can simulate pedestrian and rider on road to carry out vehicle AEB system test, has very big advantage on test safety and convenience.In SPT operation, mainly rely on synchronous belt to drag the carrier plate installed with soft target, after the preliminary tensioning of synchronous belt, the mechanism of fixed synchronous pulley can occur small slip, and at this time, the tensioning force is small, and then the load capacity of synchronous belt is influenced, and seriously, synchronous belt will slip, and every time tensioning needs to stop equipment, and the tensioning force also cannot be measured specifically, influence test use. UTILITY MODEL CONTENT

[0003] The utility model is mainly to provide a kind of automatic tensioner for synchronous belt, to solve the technical problem of prior art.

[0004] To achieve the above object, the utility model provides an automatic tensioner for synchronous belt, including synchronous pulley bottom plate, the synchronous belt is driven by driving pulley and driven pulley on the synchronous pulley bottom plate, further including,

[0005] Tensioning execution mechanism is used to adjust the tensioning force of synchronous belt, including tensioning pulley, and the tensioning pulley is controlled to be active on the synchronous pulley bottom plate by cylinder;

[0006] Tensioning detection mechanism is used to detect the tensioning force of synchronous belt, including linear sensor on the synchronous pulley bottom plate and air pressure sensor for detecting the thrust of cylinder;

[0007] Pneumatic control system is used to control the movement of the cylinder.

[0008] Further, the tensioning pulley is connected with tensioning shaft base through fixed shaft, the tensioning shaft base is connected with guide rail through sliding block, and the tensioning shaft base is connected with the rod end of the cylinder through Y joint.

[0009] Further, the measuring rod end of the linear sensor is connected with the tensioning shaft base, and is retracted with the cylinder.

[0010] Further, the extension direction of the cylinder is perpendicular to the center line of driving pulley and driven pulley.

[0011] Further, the air pressure sensor is provided with two, is connected with the air pipe of both ends of the cylinder respectively, and the thrust of cylinder is calculated in real time.

[0012] Further, the pneumatic control system comprises a gas pump, a one-way valve, a filter, a gas tank, a throttle valve and a solenoid valve, gas in the gas tank is driven by the gas pump to pass through the filter, the one-way valve and the solenoid valve into a rod end chamber of the cylinder in sequence, and gas in a non-rod end chamber of the cylinder passes through the solenoid valve and the throttle valve into the gas tank in sequence to complete a cycle.

[0013] Further, the tensioning wheel and the sliding block are arranged on one side of the synchronous wheel bottom plate, and the cylinder is arranged on the other side of the synchronous wheel bottom plate.

[0014] Further, the synchronous wheel bottom plate is provided with an opening for the fixed shaft to move under the driving of the tensioning shaft base.

[0015] Further, the tensioning actuating mechanism further comprises a tensioning mechanism base, and the sliding block, the tensioning shaft base and the extending rod of the linear sensor are arranged in the tensioning mechanism base.

[0016] Further, the tensioning mechanism base is a hollow shell structure, and the side surface and the bottom surface thereof facing the cylinder are in an open state.

[0017] The beneficial effects of the utility model are as follows:

[0018] The utility model discloses a tensioning device for synchronous belt, which comprises a synchronous wheel bottom plate, a cylinder, a tensioning wheel, a tensioning shaft base, a sliding block, a linear sensor, a fixed shaft, a gas pump, a one-way valve, a filter, a gas tank, a throttle valve and a solenoid valve. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model provides an automatic tensioning device structure schematic view;

[0020] Figure 2 The utility model provides an automatic tensioning device structure schematic view; Figure 1 Structure elevation schematic view;

[0021] Figure 3 The utility model provides an automatic tensioning device structure schematic view; Figure 1 Structure elevation schematic view;

[0022] Figure 4 The utility model provides an automatic tensioning device structure schematic view;

[0023] Description of reference numerals:

[0024] 10. Tensioning actuator; 11. Synchronous pulley base; 12. Tensioning pulley; 13. Cylinder; 14. Fixed shaft; 15. Tensioning shaft base; 16. Slider; 17. Guide rail; 18. Y-joint; 19. Tensioning mechanism base;

[0025] 20. Tension detection mechanism; 21. Linear sensor; 22. Air pressure sensor;

[0026] 30. Pneumatic control system; 31. Air pump; 32. One-way valve; 33. Filter; 34. Air storage tank; 35. Throttle valve; 36. Solenoid valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] See also Figure 1 The present invention provides an automatic tensioning device for a synchronous belt, comprising a synchronous wheel base plate 11, wherein the synchronous belt is driven by a driving wheel and a driven wheel provided on the synchronous wheel base plate 11, and further comprising a tensioning actuator 10, a tensioning detection mechanism 20 and a pneumatic control system 30;

[0029] The tensioning actuator 10 includes a tensioning wheel 12, which is controlled by a cylinder 13 on the synchronous wheel base plate 11; specifically, the tensioning wheel 12 is arranged on Figure 1 The bottom surface of the synchronous wheel base plate 11 shown in the figure, and the rest of the structures are arranged on Figure 1 The top surface of the synchronous wheel base plate 11 is shown.

[0030] For details, please refer to Figure 2 and Figure 3 The tensioning wheel 12 is connected to the tensioning shaft base 15 through the fixed shaft 14, the tensioning shaft base 15 is connected to the guide rail 17 through the slider 16, and the tensioning shaft base 15 is connected to the rod end of the cylinder 13 through the Y joint 18. Among them, the synchronous wheel base plate 11 is provided with an opening for the fixed shaft 14 to move.

[0031] In one embodiment, see Figure 1 and Figure 2The extension direction of the cylinder 13 is perpendicular to the center line of the driving wheel and the driven wheel. In this embodiment, the position of the cylinder 13 is arranged in this way, so that the force balance can be maintained during the adjustment of the tension of the synchronous belt, and the damage to the synchronous belt can be reduced.

[0032] In an embodiment, referring to Figure 1 , the tensioning wheel 12 and the sliding block 16 are arranged on one side of the synchronous wheel bottom plate 11, and the cylinder 13 is arranged on the other side of the synchronous wheel bottom plate 11.

[0033] In this embodiment, the cylinder 13 has sufficient extension space on the synchronous wheel bottom plate 11, and the overall layout of the device is reasonable and compact.

[0034] The tension detection mechanism 20 includes a linear sensor 21 and a gas pressure sensor 22 arranged on the synchronous wheel bottom plate 11, which are used to detect the tension of the synchronous belt.

[0035] Specifically, referring to Figure 1 , the gas pressure sensor 22 is provided with two, which are connected with the gas pipes at both ends of the cylinder 13, and the thrust of the cylinder 13 is calculated in real time.

[0036] In an embodiment, referring to Figure 1 and Figure 3 , the end of the measuring rod of the linear sensor 21 is connected with the tension shaft base 15, and is synchronously extended and retracted with the cylinder 13.

[0037] In this embodiment, the synchronous extension and retraction of the measuring rod of the linear sensor 21 and the cylinder 13 can cooperate with the linear sensor 21, the synchronous wheel and the tensioning wheel 12 to calculate the tension of the belt according to the trigonometric function.

[0038] The pneumatic control system 30 is used to control the movement of the cylinder 13. Referring to Figure 1 and Figure 4 , the pneumatic control system 30 includes a gas pump 31, a one-way valve 32, a filter 33, a gas tank 34, a throttle valve 35 and an electromagnetic valve 36. The gas in the gas tank 34 is driven by the gas pump 31 to pass through the filter 33, the one-way valve 32 and the electromagnetic valve 36 in sequence, and then enters the rod end chamber of the cylinder 13. The gas in the non-rod end chamber of the cylinder 13 passes through the electromagnetic valve 36 and the throttle valve 35 in sequence, and then enters the gas tank 34 to complete the cycle. When the gas pump 31 is opened and the electromagnetic valve 36 is in the left position, the same principle applies. When the gas pressure in the gas tank 34 is less than the atmospheric pressure, the gas can be supplemented from the outside through the filter 33 and the one-way valve 32.

[0039] In an embodiment, referring to Figure 3 , the tensioning mechanism 10 further includes a tensioning mechanism base 19, and the sliding block 16, the tension shaft base 15 and the extending rod of the linear sensor 21 are arranged in the tensioning mechanism base 19.

[0040] Specifically, the bottom and one side of the tensioning mechanism base 19 are open, and the tensioning shaft base 15 is driven to move by the cylinder 13, so as to drive the tensioning wheel 12 to move.

[0041] The embodiment is thus arranged to provide support for the installation of the guide rail 17, and to protect the structures such as the sliding block 16, the tensioning shaft base 15 and the linear sensor 21, thereby reducing the risk of damage caused by external impact.

[0042] The working principle of the utility model is as follows: the synchronous belt is well dressed according to requirements, the initial position of the cylinder 13 is that the cylinder 13 is fully stretched out, the automatic tensioning device is started, the pushing force of the cylinder 13 is calculated through the two air pressure sensors 22, and the belt tensioning force is calculated according to the trigonometric function of the linear sensor 21 and the synchronous wheel and the tensioning wheel 12. When the tensioning force is insufficient, the air pump 31 operates and the electromagnetic valve 36 is switched to the right position (the electromagnetic valve 36 is electrified on the right side and deenergized on the left side), the cylinder 13 is retracted, and the synchronous belt tensioning force is increased; when the tensioning force is too large, the air pump 31 operates and the electromagnetic valve 36 is switched to the left position (the electromagnetic valve 36 is electrified on the left side and deenergized on the right side), the cylinder 13 is stretched out, and the synchronous belt tensioning force is reduced; when the synchronous belt tensioning force is in the appropriate range, the electromagnetic valve 36 is in the middle position (the electromagnetic valve 36 is deenergized), and the airflow on both sides of the cylinder 13 is cut off. When the system tensioning force deviates from the reasonable tensioning force range, the tensioning force can be adjusted in real time to the reasonable range.

[0043] It should be noted that if the utility model embodiment involves directional indications such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture, such as shown in the drawings, and if the specific posture changes, the directional indications also change accordingly.

[0044] In addition, if the utility model embodiment involves descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes. In addition, "multiple" means two or more. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary technical personnel in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist.

[0045] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic tensioner for a timing belt, comprising a timing pulley base plate (11) through which the timing belt is driven by a drive pulley and a driven pulley provided on the timing pulley base plate (11), characterized in that: Also comprising, a tensioning actuator (10) for adjusting the tension of the synchronous belt, comprising a tensioning wheel (12) which is controlled to move on the synchronous wheel base plate (11) by a cylinder (13); a tensioning detection mechanism (20) for detecting the tension of the synchronous belt, comprising a linear sensor (21) arranged on the synchronous wheel base plate (11) and a gas pressure sensor (22) for detecting the thrust of the cylinder (13); a pneumatic control system (30) for controlling the movement of the cylinder (13).

2. An automatic tensioner for a serpentine belt as described in claim 1 wherein: The tensioning wheel (12) is connected with the tensioning shaft base (15) through a fixed shaft (14) penetrating the synchronous wheel base plate (11), the tensioning shaft base (15) is connected with the guide rail (17) through the sliding block (16), and the tensioning shaft base (15) is connected with the rod end of the cylinder (13) through the Y joint (18).

3. An automatic tensioner for a timing belt as in claim 2, wherein: The measuring rod end of the linear sensor (21) is connected with the tensioning shaft base (15) and synchronously extends and retracts with the cylinder (13).

4. An automatic tensioner for a serpentine belt as described in claim 1 wherein: The extension direction of the cylinder (13) is perpendicular to the center line of the driving wheel and the driven wheel.

5. An automatic tensioner for a serpentine belt as in claim 1, wherein: The gas pressure sensor (22) is provided with two, which are respectively connected with the gas pipes at both ends of the cylinder (13).

6. An automatic tensioner for a serpentine belt as described in claim 1 wherein: The pneumatic control system (30) comprises a gas pump (31), a one-way valve (32), a filter (33), a gas storage tank (34), a throttle valve (35) and an electromagnetic valve (36), the gas in the gas storage tank (34) is driven by the gas pump (31) to pass through the filter (33), the one-way valve (32) and the electromagnetic valve (36) in sequence and enter the rod end chamber of the cylinder (13), and the gas in the non-rod end chamber of the cylinder (13) passes through the electromagnetic valve (36) and the throttle valve (35) in sequence and enters the gas storage tank (34), completing the cycle.

7. The automatic tensioning device for a synchronous belt according to claim 2, characterized in that: The tensioning wheel (12) and the sliding block (16) are arranged on one side of the synchronous wheel base plate (11), and the cylinder (13) is arranged on the other side of the synchronous wheel base plate (11).

8. An automatic tensioner for a serpentine belt as described in claim 2 wherein: An opening is formed on the synchronous wheel base plate (11) for the fixed shaft (14) to move under the driving of the tensioning shaft base (15).

9. An automatic tensioner for a serpentine belt as in claim 2, wherein: The tensioning actuator (10) further comprises a tensioning mechanism base (19), and the sliding block (16), the tensioning shaft base (15) and the extending rod of the linear sensor (21) are arranged inside the tensioning mechanism base (19).

10. An automatic tensioner for a timing belt as in claim 9, wherein: The tensioning mechanism base (19) is a hollow shell structure, and the side surface and the bottom surface thereof facing the cylinder (13) are open.

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