Transmission belt tensioning device and engineering machinery

Abstract

The utility model discloses a transmission belt tensioning device and engineering machinery, and the transmission belt tensioning device comprises a first support used for installing a compressor main body; the detection device is arranged on the first bracket and can detect the tensile force of the transmission belt; the adjusting device is arranged on the first support and can adjust the tensioning force of the transmission belt according to the detection result of the detection device; and the timing device is in signal connection with the adjusting device and can meter the running time of the compressor main body, so that the adjusting device can adjust the tensioning force of the transmission belt after the compressor main body is started for a preset time length. Through the transmission belt tensioning device, the tensioning force of the transmission belt can be monitored and timely adjusted.

Description

Technical Field

[0001] The present application relates to the technical field of construction machinery, and particularly relates to a belt tensioning device and a construction machinery provided with the belt tensioning device. Background Art

[0002] The air conditioner compressor in a rotary drilling rig mainly includes a compressor body and a transmission belt (such as a V-shaped belt in cross-section, and correspondingly, both the driving pulley and the driven pulley are grooved pulleys) for driving the driven pulley of the compressor body to rotate. Among them, the compressor body is directly arranged on the engine cylinder block through a bracket, and the compressor driven pulley is driven to rotate by the driving pulley of the engine through the transmission belt. After installing the air conditioner compressor on the engine cylinder block through the bracket and sleeving the transmission belt on the compressor driven pulley and the engine driving pulley, generally, the transmission belt is first tensioned and then the engine is started. However, after the engine is started for the first time, the tension of the transmission belt often decreases. Moreover, the transmission belt gradually wears after long-term operation, and its tension also decreases, and it needs to be tensioned in time.

[0003] In the related art, generally, after the machine (including the engine and the compressor) stops, the transmission belt is tensioned and adjusted manually. However, in some products, the installation position of the transmission belt is relatively close to the inside of the whole machine or is blocked by other devices. Manual adjustment is not only time-consuming and laborious, but also very inconvenient to operate. Sometimes, many devices or components even need to be disassembled to tension and adjust the transmission belt. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a belt tensioning device and a construction machinery provided with the belt tensioning device, which can monitor and timely adjust the tension of the transmission belt.

[0005] To achieve the above purpose, the present application provides the following technical solutions:

[0006] A belt tensioning device for adjusting the tension of a transmission belt between a compressor body and an engine cylinder block, the belt tensioning device comprising:

[0007] A first bracket for mounting the compressor body;

[0008] A detection device arranged on the first bracket and capable of detecting the tension of the transmission belt;

[0009] An adjusting device arranged on the first bracket and capable of adjusting the tension of the transmission belt according to the detection result of the detection device;

[0010] A timing device, which is signal - connected to the adjustment device and can measure the running time of the compressor body, so that the adjustment device can adjust the tension of the transmission belt after the compressor body has started for a preset duration.

[0011] Optionally, in the above - mentioned transmission - belt tensioning device, a controller is further included:

[0012] The detection device is connected to the controller to send the detected tension information to the adjustment device through the controller;

[0013] The compressor body, the timing device, and the adjustment device are all connected to the controller, so as to control the adjustment device to adjust the tension of the transmission belt after the compressor body has started for a preset duration through the controller.

[0014] Optionally, in the above - mentioned transmission - belt tensioning device, the preset duration is any value within the range of 1 minute to 7 minutes.

[0015] Optionally, in the above - mentioned transmission - belt tensioning device, the first bracket includes:

[0016] A base, which is provided with a connecting seat for installing the compressor body;

[0017] A first mounting part, which is fixedly connected to the base and is used for installing the detection device;

[0018] A second mounting part, which is fixedly connected to the base and is used for installing the adjustment device.

[0019] Optionally, in the above - mentioned transmission - belt tensioning device, the first mounting part and the second mounting part are located on the same side of the base;

[0020] And / or, the first mounting part is located below the second mounting part.

[0021] Optionally, in the above - mentioned transmission - belt tensioning device, the adjustment device includes a driving main body part and a telescopic moving part, where:

[0022] The driving main body part is fixedly connected to the second mounting part and is used to control the telescopic moving part to approach or move away from the transmission belt to adjust the tension of the transmission belt;

[0023] One end of the telescopic moving part is connected to the driving main body part, and the other end extends out of the driving main body part and is provided with a cylindrical abutting column or a roller for contacting the transmission belt. The central axis of the cylindrical abutting column or the roller is parallel to the abutting surface of the transmission belt and perpendicular to the moving direction of the transmission belt.

[0024] Optionally, in the above belt tensioning device, the second mounting portion is provided with a strip-shaped through hole;

[0025] The driving main body portion and the belt are respectively located on both sides of the strip-shaped through hole;

[0026] One end of the telescopic moving portion is connected to the driving main body portion, and the other end passes through the strip-shaped through hole and can abut against the belt.

[0027] A construction machine includes an engine block, a compressor main body, a belt, and further includes a second bracket and the belt tensioning device described above, wherein:

[0028] The second bracket is located at the bottom of the engine block and is fixedly connected thereto;

[0029] The first bracket in the belt tensioning device is fixedly connected to the second bracket.

[0030] Optionally, in the above construction machine, the first bracket includes a first bottom plate and a first side plate;

[0031] The second bracket includes a second bottom plate and a second side plate. The second side plate is fixedly connected to the side wall of the engine block, and the second bottom plate is located at the bottom of the second side plate and is fixedly connected thereto;

[0032] The first bottom plate is located above the second bottom plate and is fixedly connected thereto; the first side plate is located at one end of the first bottom plate away from the second side plate and is fixedly connected to the first bottom plate.

[0033] Optionally, in the above construction machine, it further includes a radiator fan and a fan cover located outside the radiator fan;

[0034] The fan cover is provided with an avoidance notch at a position corresponding to the belt tensioning device.

[0035] As can be seen from the above technical solutions, in the belt tensioning device and construction machinery provided by the present application, due to the provision of a detection device, an adjustment device, and a timing device, during the operation of the engine and the compressor, the detection device can be used to monitor the tension of the belt in real time, and the adjustment device can be used to adjust the tension of the belt in a timely manner, so that it can be stably maintained within a suitable range, and the tension of the belt always meets the current working requirements. Moreover, in this belt tensioning device, the timing device can also measure the startup duration of the compressor main body. Therefore, after the compressor main body starts and runs for a preset duration, when the belt runs relatively stably and its tension value also tends to be stable, the adjustment device is then commanded to adjust the tension of the belt according to the detection result of the detection device, so that the unstable situation of the belt during the initial startup stage of the whole machine can be bypassed, which is beneficial to ensuring the accuracy of the detection result of the detection device, and is also beneficial to ensuring that the adjustment device can adjust the tension of the belt according to the accurate detection result, so that it can be stably maintained within a suitable range, and the tension of the belt always meets the current working requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 Schematic connection structure diagram of the belt tensioning device provided by the embodiment of the present application with the engine and the compressor.

[0038] Figure 2 Schematic connection structure diagram of the first bracket provided by the embodiment of the present application with the second bracket located at the bottom of the engine.

[0039] Figure 3 Schematic structure diagram of the first bracket provided by the embodiment of the present application.

[0040] Figure 4 Schematic installation structure diagram of the adjustment device and the detection device on the first bracket provided by the embodiment of the present application.

[0041] Figure 5 Schematic installation structure diagram of the compressor on the first bracket provided by the embodiment of the present application.

[0042] Figure 6 Schematic diagram of the hydraulic system where the adjustment device is located provided by the embodiment of the present application.

[0043] Figure 7Schematic diagram of the installation structure of the belt tensioning device, engine and compressor provided in the embodiments of the present application in construction machinery.

[0044] Wherein:

[0045] 1 - engine block, 2 - transmission belt, 3 - adjusting device, 4 - compressor main body,

[0046] 5 - first bracket, 6 - detection device, 7 - second bracket, 10 - controller, 11 - timing device,

[0047] 16 - radiator, 17 - fan cover, 18 - hydraulic hose,

[0048] 19 - radiator fan, 20 - radiator support rod, 21 - hydraulic oil tank,

[0049] 31 - driving main body part, 32 - telescopic moving part,

[0050] 51 - base, 52 - reinforcing rib, 53 - first mounting part, 54 - second mounting part,

[0051] 71 - second bottom plate, 72 - second side plate,

[0052] 81 - second fastener, 82 - second washer,

[0053] 91 - first fastener, 92 - first washer,

[0054] 510 - connecting seat, 511 - first bottom plate, 512 - first side plate, 540 - strip through hole,

[0055] 101 - fourth fastener, 102 - fourth washer,

[0056] 111 - third fastener, 112 - third washer,

[0057] 301 - first oil circuit, 302 - second oil circuit, 303 - solenoid valve, 304 - check valve,

[0058] 305 - oil tank, 306 - pump body. Detailed implementation manners

[0059] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0060] Please refer to Figure 1, embodiments of the present application provide a belt tensioning device for adjusting the tension of the belt 2 between the compressor main body 4 and the engine block 1. The belt tensioning device includes a first bracket 5, a detection device 6, an adjustment device 3, and a timing device 11, where: The first bracket 5 is used to mount the compressor main body 4; The detection device 6 is arranged on the first bracket 5 and can detect the tension of the belt 2. Specifically, in implementation, the detection device 6 can use a tension sensor or other sensors that can detect the tension of the belt 2; The adjustment device 3 is arranged on the first bracket 5 and can adjust the tension of the belt 2 according to the detection result of the detection device 6. Specifically, in implementation, the adjustment device 3 can use a telescopic oil cylinder or a cylinder or a linear motor or a driving mechanism composed of a motor and a ball screw, etc., or other power devices that can press the belt 2; The timing device 11 is signal-connected to the adjustment device 3 and can measure the running time of the compressor main body 4, so that the control adjustment device 3 can adjust the tension of the belt 2 after the compressor main body 4 starts for a preset duration. Here, it should be noted that the preset duration mentioned in this article is a pre-set time length, which can be any value within the range of 1 minute to 7 minutes, such as 3 minutes or 4 minutes or 5 minutes or 6 minutes or 7 minutes or 200 seconds or 300 seconds or 400 seconds, etc.

[0061] During the operation of the whole machine (including at least the engine and the compressor) where the belt tensioning device is located, the detection device 6 can monitor the tension situation of the belt 2 in real time, and the adjustment device 3 can timely adjust the tension of the belt 2, so that it is stably maintained within a suitable range, and the tension situation of the belt 2 always meets the current working requirements. Moreover, in this belt tensioning device, the timing device 11 can also measure the starting duration of the compressor main body 4. Thus, after the compressor main body 4 starts and runs for a preset duration, when the belt 2 runs relatively stably and its tension value also tends to be stable, the adjustment device 3 is then made to adjust the tension of the belt 2 according to the detection result of the detection device 6. Thereby, the unstable situation of the belt 2 during the initial stage of the whole machine startup can be bypassed, which is beneficial to ensuring the accuracy of the detection result of the detection device 6, and is also beneficial to ensuring that the adjustment device 3 can adjust the tension of the belt 2 based on the accurate detection result, so that it is stably maintained within a suitable range, and the tension situation of the belt 2 always meets the current working requirements.

[0062] In some embodiments, the belt tensioning device further includes a controller 10, and the detection device 6, the adjustment device 3, and the timing device 11 are respectively connected to the controller 10. Among them, the detection device 6 is connected to the controller 10 to send the detected tension information to the adjustment device 3 through the controller 10; the compressor main body 4, the timing device 11, and the adjustment device 3 are all connected to the controller 10, so as to send the timing information to the controller 10 to control the adjustment device 3 to adjust the tension of the transmission belt 2 after the compressor main body 4 starts for a preset duration through the controller 10.

[0063] In some embodiments, the central control host of the whole machine can be borrowed as the controller 10, and the adjustment device 3 includes a telescopic oil cylinder, and the telescopic oil cylinder is connected to the main pump hydraulic system of the host. Please refer to Figure 6 the shown hydraulic schematic diagram. Among them, the main pump hydraulic system of the host includes a first oil circuit 301 connected to the rodless cavity of the telescopic oil cylinder, a second oil circuit 302 connected to the rodless cavity of the telescopic oil cylinder, and a solenoid valve 303, a check valve 304, an oil tank 305, and a pump body 306. The second oil circuit 302 is located between the rodless cavity of the telescopic oil cylinder and the solenoid valve 303, and is provided with a check valve 304. When the solenoid valve 303 is de-energized and held in the middle position, the telescopic oil cylinder can be ensured to be in the extended state through the check valve 304, so as to ensure the loop pressure of the telescopic oil cylinder and the tension of the transmission belt 2; the oil inlet of the solenoid valve 303 is connected to the pump body 306, and the oil return port is connected to the oil tank 305; the timing device 11 records the running duration after the compressor main body 4 is started, and the time is cleared after each compressor shutdown; the controller 10 controls the energization and de-energization of the solenoid valve 303 according to the detection result of the detection device 6 and the recorded duration of the timing device 11. Specifically, the timing device 11 can be a timing device independently installed relative to the controller 10, or a timing sensor or any other module with a timing function provided on the controller main board.

[0064] For example, in a specific embodiment, the program settings in the central control host include: the minimum tension value of the transmission belt 2 is F1, and when it is lower than F1, the belt will slip and accelerate wear, affecting the belt life; the maximum tension value of the transmission belt 2 is F2, and when it exceeds F2, the belt will also accelerate wear and affect the belt life; the initial tension value of the transmission belt 2 is F3; the magnitude relationship among F1, F2, and F3 is F1 < F2 < F3. For example, F1 = 270N, F2 = 330N, and F3 = 480N can be set. The specific parameter settings of F1, F2, and F3 are specifically set according to the specifications of the transmission belt 2.

[0065] When first assembling the compressor main body 4 and the transmission belt 2, the assembly worker manually tensions the transmission belt 2 so that the tension value of the transmission belt 2 is adjusted to between F3 and 1.1*F3. When the compressor runs for the first time, the tension value of the transmission belt 2 gradually decreases. After running for a preset duration (e.g., 3 to 5 minutes), the tension of the transmission belt 2 tends to a stable value. The detection device 6 continuously detects the tension value of the transmission belt 2 and feeds it back to the controller 10. After the timing device 11 calculates that the compressor has been running for the preset duration (e.g., 3 to 5 minutes), the controller 10 monitors the tension value detected by the detection device 6:

[0066] When the tension value is lower than the set value F1, the controller 10 controls the solenoid valve 303 to be energized. The right side of the solenoid valve 303 is in communication, and the pump body 306 injects hydraulic oil into the rodless cavity. The telescopic rod extends and gradually presses the transmission belt 2, and the tension value of the transmission belt 2 gradually increases;

[0067] When the detection device 6 detects that the tension value of the transmission belt 2 is greater than F1 and less than or equal to F2, the controller 10 controls the solenoid valve 303 to be de-energized. The solenoid valve 303 moves to the middle position, and the telescopic cylinder stops moving;

[0068] When the detection device 6 detects that the tension value of the transmission belt 2 is greater than the set value F2, the controller 10 controls the solenoid valve 303 to be energized. The left side of the solenoid valve 303 is in communication, and the pump body 306 injects hydraulic oil into the rod cavity. The telescopic rod retracts and moves away from the transmission belt 2, and the tension value of the transmission belt 2 gradually decreases;

[0069] When the detection device 6 detects that the tension value is greater than or equal to F1 and less than or equal to F2, the central control host will de-energize the solenoid valve 303, and the telescopic cylinder will stop moving. At this time, the hydraulic circuit ensures the circuit pressure in the telescopic cylinder through the one-way valve 304 to keep the tension of the transmission belt 2 stable.

[0070] It should be noted here that the timing device 11 calculates that the compressor main body 4 has run for the preset duration before the adjustment device 3 can be started. This is a prerequisite. When the running time of the compressor main body 4 is less than the preset duration, the solenoid valve 303 is always de-energized, and the adjustment device 3 is away from the transmission belt 2 and has no action.

[0071] Please refer to Figures 1 to 4, in some embodiments, the first bracket 5 in the belt tensioning device includes a base 51, a first mounting portion 53, and a second mounting portion 54, where: the base 51 is provided with a connecting seat 510 for mounting the compressor main body 4; the first mounting portion 53 is fixedly connected to the base 51 and is used for mounting the detection device 6; the second mounting portion 54 is fixedly connected to the base 51 and is used for mounting the adjusting device 3. Moreover, the first mounting portion 53 and the second mounting portion 54 are located on the same side of the base 51, and the first mounting portion 53 is located below the second mounting portion 54, so that the detection device 6 is located below the transmission belt 2 and contacts its lower side surface, and the adjusting device 3 is located above the transmission belt 2 and contacts its upper side surface. As Figure 1 shown, the detection device 6 and the adjusting device 3 are respectively located on both sides of the annular transmission belt 2 and abut against and squeeze the transmission belt 2 to make the wrap angles between the transmission belt 2 and the engine driving wheel and between the transmission belt 2 and the compressor driven wheel reach the preset values required at present, so that the tension of the transmission belt 2 meets the requirements.

[0072] Please refer to Figure 3 and Figure 4 , in some embodiments, the adjusting device 3 includes a driving main body portion 31 and a telescopic moving portion 32. Wherein: the driving main body portion 31 is fixedly connected to the second mounting portion 54 and is used for controlling the telescopic moving portion 32 to approach or move away from the transmission belt 2 to adjust the tension of the transmission belt 2; one end of the telescopic moving portion 32 is connected to the driving main body portion 31, and the other end extends out of the driving main body portion 31 and is provided with a cylindrical abutting column or a roller for contacting the transmission belt 2. The central axis of the cylindrical abutting column or the roller is parallel to the abutting surface of the transmission belt 2 and perpendicular to the moving direction of the transmission belt 2. Preferably, the parts of the detection device 6 and the adjusting device 3 for abutting against the transmission belt 2 can rotate during operation, so as to reduce the friction on the transmission belt 2 by means of rolling cooperation.

[0073] Please refer to Figure 1 , Figure 3 and Figure 4 , in some embodiments, the second mounting portion 54 of the first bracket 5 is provided with a strip-shaped through hole 540, where: the driving main body portion 31 and the transmission belt 2 are respectively located on both sides of the strip-shaped through hole 540; one end of the telescopic moving portion 32 is in transmission connection with the driving main body portion 31, and the other end is connected to the cylindrical abutting column or the roller. The central axis of the cylindrical abutting column or the roller passes through the strip-shaped through hole 540 and can abut against the transmission belt 2. Thus, the telescopic moving portion 32 of the adjusting device 3 can reciprocate along the length direction of the strip-shaped through hole 540, and the strip-shaped through hole 540 can play a role in limiting and guiding the telescopic moving portion 32 of the adjusting device 3.

[0074] Please refer to Figure 3, in some embodiments, the base 51 of the first bracket 5 includes a first bottom plate 511 and a first side plate 512. The first side plate 512 includes a first plate in an integral angle steel structure with the first bottom plate 511, and a second plate welded to the outer side surface of the first plate and extending upward. Moreover, at least two reinforcing ribs 52 are welded between the first bottom plate 511 and the first side plate 512 to improve the stiffness of the bracket. In addition, the second mounting portion 54 for mounting the adjusting device 3 is welded to the inner side surface of the second plate of the first side plate 512, the first mounting portion 53 for mounting the detecting device 6 is welded to the inner side surface of the first plate of the first side plate 512, and a plurality of connecting seats 510 for mounting the compressor main body 4 are provided, which are divided into two groups and arranged on the outer side surfaces of the first plate and the second plate of the first side plate 512 respectively to facilitate the installation of the compressor main body 4.

[0075] In some construction machinery, such as rotary drilling rigs or loaders, etc., bolts of M8 specification are generally used to directly connect the air-conditioning compressor to the engine block. During the operation of the construction machinery, the bolts at this position are prone to being pulled and damaged, deformed or broken, and there is also a risk of damaging the engine block. Based on this, the embodiments of the present application provide a construction machinery, please refer to Figure 1 and Figure 7 , the construction machinery includes an engine block 1, a compressor main body 4, a transmission belt 2, and also includes a second bracket 7 and the transmission belt tensioning device described above. Among them: The second bracket 7 is located at the bottom of the engine block 1 and is fixedly connected thereto; the first bracket 5 in the transmission belt tensioning device is fixedly connected to the second bracket 7. It can be seen that in the construction machinery provided by the embodiments of the present application, the first bracket 5 for mounting the compressor main body 4 is not directly connected to the engine block 1, but is arranged on the leg located at the bottom of the engine block, that is, the second bracket 7, so as to avoid damaging the engine block. And at this time, the first bracket 5 for mounting the compressor main body 4 and the second bracket 7 can be connected by fasteners with greater stiffness to avoid the problems of the fasteners being pulled and damaged, deformed or broken, and ensure the firm connection at this position.

[0076] Please refer to Figure 1 , in some embodiments, the first bracket 5 includes a first bottom plate 511 and a first side plate 512; the second bracket 7 includes a second bottom plate 71 and a second side plate 72. The second side plate 72 is fixedly connected to the side wall of the engine block 1, the second bottom plate 71 is located at the bottom of the second side plate 72 and is fixedly connected thereto; the first bottom plate 511 is located above the second bottom plate 71 and is fixedly connected thereto; the first side plate 512 is located at one end of the first bottom plate 511 away from the second side plate 72 and is fixedly connected to the first bottom plate 511.

[0077] Please refer to Figure 2, in some embodiments, the second bracket 7 is fixedly connected to the engine block 1 through a first fastener 91, and the first bracket 5 is fixedly connected to the second bracket 7 through a second fastener 81. Specifically, both the first fastener 91 and the second fastener 81 can be bolts with a specification of M12, and a first washer 92 is further provided between the first fastener 91 and the engine block 1, and a second washer 82 is further provided between the second fastener 81 and the first bracket 5. In addition, please refer to Figure 5 , the compressor body 4 is connected to the connecting seat 510 on the first bracket 5 through a third fastener 111, and the detection device 6 is fixed to the first mounting portion 53 of the first bracket 5 through a fourth fastener 101. Specifically, the third fastener 111 can be a long bolt, and the fourth fastener 101 can be a shorter bolt or screw; moreover, a third washer 112 is further provided between the third fastener 111 and the connecting seat 510, and a fourth washer 102 is further provided between the fourth fastener 101 and the first mounting portion 53 of the first bracket 5. However, it is not limited thereto. In other embodiments, the first fastener 91, the second fastener 81, the third fastener 111, and the fourth fastener 101 can all be replaced with other fasteners with higher connection strength, and the present application does not make specific limitations thereto.

[0078] During specific implementation, the construction machinery further includes a radiator fan 19 and a fan cover 17 located outside the radiator fan 19. An avoidance notch is provided at a position of the fan cover 17 corresponding to the belt tensioning device to prevent interference between the fan cover 17 and the belt tensioning device. For example, in some embodiments, the radiator fan 19 is provided with a cover body that is 3 / 4 of a full circle and an avoidance notch that is 1 / 4 of a full circle along the circumferential direction.

[0079] Specifically, it can be referred to Figure 7 , the radiator fan 19 is arranged inside the radiator 16, the radiator fan cover 17 is fixed to the radiator 16, and the hydraulic hose 18 on the hydraulic oil tank 21 is connected to the radiator 16, so that the hydraulic oil in the hydraulic oil tank 21 can be led into the radiator 16 for cooling. The first bracket 5 in the belt tensioning device is fixed to the leg (i.e., the second bracket 7) at the bottom of the engine block 1, and the radiator support rod 20 connects the radiator 16 and is fixed on the platform. Limited by the positions of the hydraulic oil tank 21 and the radiator 16, the first bracket 5 of the belt tensioning device is fixed to the right rear leg of the engine block 1. At the same time, the first bracket 5 adopts an integrally formed angle steel structure, which occupies a relatively small space dimension.

[0080] It should be noted here that the construction machinery provided in the embodiments of the present application can specifically be a rotary drilling rig or a loader, or any other machine that is provided with an engine and an air-conditioning compressor and can apply the above-mentioned belt tensioning device.

[0081] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed.

[0082] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference may be made to each other.

[0083] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A transmission belt tensioning device for adjusting the tension of a transmission belt (2) between a compressor body (4) and an engine cylinder block (1), characterized in that: include: A first bracket (5) for mounting the compressor body (4); A detection device (6), arranged on the first bracket (5), capable of detecting the tension of the transmission belt (2); an adjusting device (3), arranged on the first bracket (5), capable of adjusting the tension of the transmission belt (2) according to the detection result of the detection device (6); The timing device (11) is connected to the signal of the regulating device (3) and can measure the running time of the compressor body (4), so that the regulating device (3) can adjust the tension of the transmission belt (2) after the compressor body (4) is started for a preset time.

2. The transmission belt tensioning device according to claim 1, characterized in that: Also included is a controller (10): The detection device (6) is connected to the controller (10) so as to send the detected tension information to the adjustment device (3) through the controller (10); The compressor body (4), the timing device (11) and the adjusting device (3) are all connected to the controller (10), so that the adjusting device (3) is controlled by the controller (10) to adjust the tension of the transmission belt (2) after the compressor body (4) is started for a preset time.

3. The transmission belt tensioning device according to claim 1 or 2, characterized in that: The preset duration is any value within the range of 1 minute to 7 minutes.

4. The transmission belt tensioning device according to claim 1, characterized in that: The first bracket (5) comprises: A base (51) provided with a connecting seat (510) for mounting the compressor body (4); A first mounting portion (53) fixedly connected to the base (51) and used for mounting the detection device (6); The second mounting portion (54) is fixedly connected to the base (51) and is used for mounting the adjusting device (3).

5. The transmission belt tensioning device according to claim 4, characterized in that: The first mounting portion (53) and the second mounting portion (54) are located on the same side of the base (51); And / or, the first mounting portion (53) is located below the second mounting portion (54).

6. The transmission belt tensioning device according to claim 4 or 5, characterized in that: The adjusting device (3) comprises a driving main body (31) and a telescopic moving part (32), wherein: The driving main body (31) is fixedly connected to the second mounting portion (54) and is used to control the telescopic moving portion (32) to move closer to or farther from the transmission belt (2) so as to adjust the tension of the transmission belt (2); One end of the telescopic movable part (32) is connected to the driving main body part (31), and the other end extends out of the driving main body part (31) and is provided with a cylindrical abutment column or a roller for contacting the transmission belt (2), wherein the central axis of the cylindrical abutment column or the roller is parallel to the abutment surface of the transmission belt (2) and perpendicular to the moving direction of the transmission belt (2).

7. The transmission belt tensioning device according to claim 6, characterized in that: The second mounting portion (54) is provided with a strip-shaped through hole (540); The driving main body (31) and the transmission belt (2) are respectively located on two sides of the strip-shaped through hole (540); One end of the telescopic moving part (32) is connected to the driving main body part (31), and the other end passes through the strip-shaped through hole (540) and can abut against the transmission belt (2).

8. An engineering machine, comprising an engine cylinder block (1), a compressor body (4), and a transmission belt (2), characterized in that: It also comprises a second bracket (7), and a transmission belt tensioning device according to any one of claims 1 to 7, wherein: The second bracket (7) is located at the bottom of the engine cylinder block (1) and is fixedly connected thereto; The first bracket (5) in the transmission belt tensioning device is fixedly connected to the second bracket (7).

9. The construction machine according to claim 8, characterized in that: The first bracket (5) comprises a first bottom plate (511) and a first side plate (512); The second bracket (7) comprises a second bottom plate (71) and a second side plate (72), the second side plate (72) being fixedly connected to the side wall of the engine cylinder block (1), and the second bottom plate (71) being located at the bottom of the second side plate (72) and fixedly connected thereto; The first bottom plate (511) is located above the second bottom plate (71) and is fixedly connected thereto; the first side plate (512) is located at an end of the first bottom plate (511) away from the second side plate (72) and is fixedly connected to the first bottom plate (511).

10. The engineering machine according to claim 8, characterized in that: It also includes a radiator fan (19) and a fan cover (17) located outside the radiator fan (19); The fan cover (17) is provided with an escape notch at a position corresponding to the transmission belt tensioning device.

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