A torque testing device

Abstract

The present application discloses a torque testing device, which belongs to the field of torque testing technology, and includes a chassis, a driving shaft, a first transmission assembly, a second transmission assembly, and a torque sensor. The driving shaft is rotatably connected to the chassis, and the test shaft is arranged in parallel with the driving shaft. The first transmission assembly and the second transmission assembly are respectively installed at the two ends of the driving shaft. When the transmission ratio of the second transmission assembly is different from that of the first transmission assembly, the rotation speeds of the two ends of the test shaft will be different, thereby generating torque on the test shaft. The torque sensor can detect the maximum torque that the test shaft can withstand when it breaks. The torque testing device disclosed in the present invention drives the test shaft to rotate through the first transmission assembly and the second transmission assembly. At the same time, the speed difference between the first transmission assembly and the second transmission assembly is used to apply torque to the test shaft, so as to test the maximum torque that the object to be tested can withstand during high-speed operation, and the test data is more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of torque testing, and in particular to a torque testing device. Background Art

[0002] The device for detecting torque of a torque load object is a torque detection device, which includes a servo motor, a rotating roller, and a torque sensor, effectively achieving a positioning effect and effectively detecting torque of the torque load object.

[0003] However, existing testing devices generally fix one end of the test piece and then apply torque to the other end of the test piece. This static testing method does not produce accurate data. Summary of the invention

[0004] The invention discloses a torque testing device to improve the above problems.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] Based on the above purpose, the present invention discloses a torque testing device, comprising:

[0007] Chassis;

[0008] A driving shaft, the driving shaft being rotatably connected to the chassis;

[0009] A first transmission assembly, one end of which is connected to the driving shaft, and the other end of which is used to drive the test shaft;

[0010] a second transmission assembly, one end of which is connected to the driving shaft, and the other end of which is used to drive the test shaft; and

[0011] A torque sensor is used to detect the torque on the test shaft.

[0012] Optionally, the first transmission assembly includes:

[0013] A driving motor, which is mounted on the chassis and is drivingly connected to the driving shaft;

[0014] A first gear, the first gear being mounted on the driving shaft; and

[0015] A second gear is meshed with the first gear and connected to the test shaft.

[0016] Optionally, the second transmission assembly includes:

[0017] Planetary gear train;

[0018] A torque loading motor, the torque loading motor is drivingly connected to the sun gear of the planetary gear train;

[0019] a third gear, the third gear being mounted on the driving shaft and connected to the planetary gear of the planetary gear train via a connecting frame; and

[0020] A fourth gear is meshed with the ring gear of the sun gear train, and the fourth gear is connected to the test shaft.

[0021] Optionally: it also includes a clamping gear, which is meshed with the ring gear.

[0022] Optionally: a coaxial first connecting rod and an intermediate connecting rod are provided on the sun gear, the intermediate connecting rod is rotatably connected to the first connecting rod, a second connecting rod is provided on the connecting frame, the second connecting rod is coaxially arranged with the first connecting rod, and the second connecting rod is snap-fitted with the intermediate connecting rod.

[0023] Optionally, a clamping groove is provided at one end of the intermediate connecting rod away from the first connecting rod, and a clamping block is provided at one end of the second connecting rod away from the connecting frame, and the clamping block is engaged with the clamping block.

[0024] Optionally: the clamping block is spherical, and a plurality of clamping plates and a clamping ring are provided on the intermediate connecting rod. The plurality of clamping plates are arranged at intervals along the circumference of the intermediate connecting rod, and one end of the clamping plate away from the intermediate connecting rod is inclined inward along the axis of the intermediate connecting rod. The plurality of clamping plates surround the clamping groove, and the clamping ring is sleeved outside the clamping plate, and the clamping ring is threadedly connected to the clamping plate.

[0025] Optionally: a slide and an elastic member are also provided on the middle connecting rod, the slide is located in the slot, and the slide is slidably matched with the slot, the two ends of the elastic member are respectively connected to the middle connecting rod and the slide, the elastic member makes the slide have a tendency to move out of the slot, and the diameter of the slide is smaller than the minimum diameter of the slot.

[0026] Optionally: there are multiple planetary gears, and they are divided into more than three groups along the circumference of the sun gear. The more than three groups of planetary gears are evenly arranged along the circumference of the sun gear, and the number of planetary gears in each group gradually increases along the circumference of the sun gear.

[0027] Optionally, the distance between two adjacent planetary wheels in the same group is smaller than the distance between the planetary wheels between two adjacent groups.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The torque testing device disclosed in the present invention drives the tested shaft to rotate through the first transmission component and the second transmission component. At the same time, the speed difference between the first transmission component and the second transmission component is used to apply torque to the test shaft, so as to test the maximum torque that the object to be tested can withstand during high-speed operation, and the test data is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of a torque testing device disclosed in an embodiment of the present invention is shown;

[0032] Figure 2 A top view of a first planetary gear train disclosed in an embodiment of the present invention is shown;

[0033] Figure 3 A schematic diagram of a planetary gear train disclosed in an embodiment of the present invention is shown;

[0034] Figure 4 The embodiment of the present invention is shown Figure 3 A cross-sectional view of

[0035] Figure 5 The embodiment of the present invention is shown Figure 4 A partial enlarged view of

[0036] Figure 6 A top view of a second planetary gear train disclosed in an embodiment of the present invention is shown.

[0037] In the figure:

[0038] 100-chassis, 200-driving shaft, 300-first transmission assembly, 310-driving motor, 320-first gear, 330-second gear, 400-second transmission assembly, 410-torque loading motor, 420-planetary gear train, 421-sun gear, 422-planetary gear, 423-ring gear, 424-connecting frame, 425-first connecting rod, 426-middle connecting rod, 4261-clamping plate, 4262-clamping ring, 4263-sliding plate, 4264-elastic member, 4265-slot, 427-second connecting rod, 4271-block, 430-third gear, 440-fourth gear, 500-torque sensor, 600-test shaft, 700-clamping gear. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application disclosed in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0042] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the embodiments of the present application, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0045] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] Example:

[0047] See also Figure 1 The embodiment of the present invention discloses a torque testing device, which includes a chassis 100, a driving shaft 200, a first transmission assembly 300, a second transmission assembly 400 and a torque sensor 500. The driving shaft 200 is rotatably connected to the chassis 100, and a station for installing a test shaft 600 is also provided on the chassis 100, and the test shaft 600 is arranged parallel to the driving shaft 200. The first transmission assembly 300 and the second transmission assembly 400 are respectively installed at both ends of the driving shaft 200, that is, the two ends of the driving shaft 200 and the two ends of the test shaft 600 are connected by the first transmission assembly 300 and the second transmission assembly 400 respectively. When the transmission ratio of the second transmission assembly 400 is different from that of the first transmission assembly 300, the rotation speeds of the two ends of the test shaft 600 are different, thereby generating torque on the test shaft 600. The torque sensor 500 can be used to detect the torque on the test shaft 600 and the maximum torque that the test shaft 600 can withstand when it breaks in real time. By sampling a few test shafts 600 from the same batch for testing, the maximum torque of the test shafts 600 of this batch can be basically determined to facilitate installation and use.

[0048] The torque testing device disclosed in this embodiment drives the test shaft 600 to rotate through the first transmission component 300 and the second transmission component 400. At the same time, the speed difference between the first transmission component 300 and the second transmission component 400 is used to apply torque to the test shaft 600, so as to test the maximum torque that the test shaft 600 can withstand during high-speed operation, and the test data is more accurate.

[0049] Among them, the torque sensor 500 is also called a torque sensor, a torque sensor, a torque sensor, and a torque meter, which is divided into two categories: dynamic and static. The dynamic torque sensor 500 can also be called a torque sensor, a torque speed sensor, a non-contact torque sensor 500, a rotation torque sensor 500, etc. The torque sensor 500 is a detection of the perception of torsional torque on various rotating or non-rotating mechanical parts. The torque sensor 500 converts the physical change of torque into an accurate electrical signal. The torque sensor 500 can be used in the manufacture of viscometers, electric (pneumatic, hydraulic) torque wrenches, and has the advantages of high precision, fast frequency response, good reliability, and long life.

[0050] See also Figure 1, the first transmission assembly 300 includes an active motor 310, a first gear 320 and a second gear 330. The active motor 310 is mounted on the chassis 100, and the active motor 310 is in transmission connection with the active shaft 200. The first gear 320 is mounted on the first end of the active shaft 200, and the second gear 330 is used to be connected to the first end of the test shaft 600, and the second gear 330 is meshed with the first gear 320. When the active motor 310 is working, it can drive the active shaft 200 to rotate, and then drive the test shaft 600 to rotate through the first gear 320 and the second gear 330.

[0051] See also Figure 1 , the second transmission assembly 400 includes a planetary gear train 420, a torque loading motor 410, a third gear 430 and a fourth gear 440. The torque loading motor 410 is mounted on the other end of the chassis 100, and the torque loading motor 410 is transmission-connected to the sun gear 421 of the planetary gear train 420. The third gear 430 is mounted on the second end of the driving shaft 200, and the third gear 430 is connected to the planetary gear 422 of the planetary gear train 420 through a connecting frame 424. The fourth gear 440 is used to be connected to the second end of the test shaft 600, and the fourth gear 440 is meshed with the ring gear 423 of the sun gear 421. The rotation of the ring gear 423 of the planetary gear train 420 can be controlled by controlling the speed and direction of the torque loading motor 410, so that the rotation direction of the fourth gear 440 is the same as the rotation direction of the second gear 330. Furthermore, by adjusting the rotation speed of the torque loading motor 410 , the rotation speed of the ring gear 423 can be changed, thereby changing the rotation speed of the fourth gear 440 , so that there is a difference between the rotation speed of the fourth gear 440 and the rotation speed of the second gear 330 , resulting in torque on the test shaft 600 .

[0052] It is an implementation method of this embodiment that only the first gear 320 and the second gear 330 are arranged between the first end of the driving shaft 200 and the first end of the test shaft 600, and only the third gear 430 and the fourth gear 440 are arranged between the second end of the driving shaft 200 and the second end of the test shaft 600. In other implementation methods, it is also possible to set more gears to adjust the speed. For example, a gear is added between the first gear 320 and the second gear 330, and accordingly, a gear should be added between the third gear 430 and the connecting frame 424 of the planetary gear train 420, or a gear is added between the ring gear 423 of the planetary gear train 420 and the fourth gear 440 to ensure that when the driving shaft 200 rotates, the rotation of the two ends of the test gear after the speed regulation of the first transmission assembly 300 and the second transmission assembly 400 is the same. Based on the above statement, it can be seen that when a number of gears are added between the first end of the driving shaft 200 and the first end of the test shaft 600, the same number of gears should be added between the second end of the driving shaft 200 and the second end of the test shaft 600.

[0053] The above is only one test method of this embodiment. Since the rotation speed and rotation direction of the ring gear 423 of the planetary gear train 420 can be adjusted by adjusting the rotation speed and rotation direction of the second end of the test shaft 600, and the purpose of adjusting the rotation direction of the second end of the test shaft 600 can be further achieved, when the torque of the test shaft 600 is tested using the torque testing device disclosed in this embodiment, the rotation speed and rotation direction of the torque loading motor 410 can also be adjusted to make the rotation direction of the first end of the test shaft 600 opposite to the rotation direction of the second end. This method can also test the maximum torque of the test shaft 600, and compared with the existing test method, the forces of the first transmission assembly 300 and the second transmission assembly 400 are respectively applied to the first end and the second end of the test shaft 600, thereby ensuring that the force on the test shaft 600 is more uniform, thereby ensuring that the test result is more accurate.

[0054] See also Figure 1 and Figure 2 , since the connecting frame 424 of the planetary gear train 420 is directly or indirectly connected to the third gear 430, the sun gear 421 of the planetary gear train 420 is connected to the torque loading motor 410, and the ring gear 423 of the planetary gear train 420 is directly or indirectly connected to the fourth gear 440, all components of the planetary gear train 420 are in an active state, which may reduce the stability of the planetary gear train 420. Therefore, in this embodiment, one or more clamping gears 700 can be added, the clamping gear 700 is meshed with the outer wall of the ring gear 423, and these clamping gears 700 and the fourth gear 440 are evenly distributed around the ring gear 423, so that the rotation of the ring gear 423 is more stable, thereby ensuring that the operation of the planetary gear train 420 is more stable.

[0055] See also Figure 3 and Figure 4In order to further enhance the stability of the planetary gear train 420 during operation, the present embodiment further provides a first connecting rod 425, an intermediate connecting rod 426, and a second connecting rod 427 between the sun gear 421 and the connecting frame 424 for enhancing stability. The first connecting rod 425 and the intermediate connecting rod 426 are provided on the sun gear 421, and the first connecting rod 425 and the intermediate connecting rod 426 are both provided coaxially with the sun gear 421. One end of the first connecting rod 425 is connected to the sun gear 421, and the other end of the first connecting rod 425 is rotatably connected to the intermediate connecting rod 426. One end of the second connecting rod 427 is connected to the connecting frame 424, and the other end of the second connecting rod 427 is snap-fitted with one end of the intermediate connecting rod 426 away from the first connecting rod 425. When the second connecting rod 427 is engaged with the middle connecting rod 426 , the rotation of the sun gear 421 and the connecting frame 424 can be more stable. Since the middle connecting rod 426 can rotate relative to the first connecting rod 425 , the rotation between the sun gear 421 and the connecting frame 424 will not be affected.

[0056] See also Figure 4 and Figure 5 The clamping block 4271 is spherical. A plurality of clamping pieces 4261 and a clamping ring 4262 are provided on the middle connecting rod 426. The plurality of clamping pieces 4261 are arranged at intervals along the circumference of the middle connecting rod 426, and one end of the clamping piece 4261 away from the middle connecting rod 426 is inclined inwardly along the axis of the middle connecting rod 426, and the plurality of clamping pieces 4261 surround the above-mentioned clamping groove 4265. The clamping ring 4262 is sleeved outside the clamping piece 4261, and the clamping ring 4262 is threadedly connected to the clamping piece 4261.

[0057] During installation, firstly, the clamping ring 4262 is rotated forward to move the clamping ring 4262 in the direction away from the first connecting rod 425. At this time, the opening of the slot 4265 will gradually increase, and then the block 4271 on the second connecting rod 427 can be placed in the slot 4265. At this time, the connecting frame 424 is pushed to move toward the gear ring 423, and when the connecting frame 424 can be connected with the planetary gear 422, the movement stops. Then, the connecting frame 424 and the planetary gear 422 are connected together by bolts, and then the clamping ring 4262 is screwed in the reverse direction. At this time, the clamping ring 4262 moves toward the first connecting rod 425. During this process, the clamping ring 4262 will make the clamping piece 4261 tilt inward, that is, the notch of the slot 4265 is reduced. After the clamping ring 4262 is tightened, the second connecting rod 427 and the middle connecting rod 426 are fixed.

[0058] During disassembly, the bolts are first removed to separate the connecting frame 424 from the planetary gear 422. Then, the clamping ring 4262 is screwed forward, and when the clamping ring 4262 moves toward the second connecting rod 427, the notch of the clamping slot 4265 is enlarged, thereby facilitating the disengagement of the clamping block 4271 from the clamping slot 4265.

[0059] In addition, a slide 4263 and an elastic member 4264 are also provided on the middle connecting rod 426. The slide 4263 is located in the slot 4265, and the slide 4263 and the slot 4265 are slidably matched. The two ends of the elastic member 4264 are respectively connected to the middle connecting rod 426 and the slide 4263, and the elastic member 4264 makes the slide 4263 have a tendency to move toward the outside of the slot 4265, and the diameter of the slide 4263 is smaller than the minimum diameter of the slot 4265. On the one hand, when the second connecting rod 427 and the middle connecting rod 426 are in a connected state, the elastic force on the elastic member 4264 will be transmitted to the clamping ring 4262, thereby forming a locking thrust on the threaded connection between the clamping ring 4262 and the clamping sheet 4261, so as to prevent the clamping ring 4262 from loosening when the planetary gear train 420 is running. Secondly, the elastic force of the elastic member 4264 pushes the slide plate 4263 and the block 4271 to press against each other, so as to prevent the second connecting rod 427 and the middle connecting rod 426 from shaking when the planetary gear train 420 rotates. Thirdly, when the clamping ring 4262 slides inward, the clamping ring 4262 fastens the clamping piece 4261 and tilts the clamping piece 4261 inward, thereby reducing the notch of the slot 4265 and allowing the clamping piece 4261 to clamp the block 4271; and when the clamping ring 4262 slides outward, the clamping piece 4261 has a tendency to recover and tilt outward according to its original shape, but after being fastened by the clamping ring 4262 for a long time or the clamping ring 4262 moves back and forth many times, the clamping piece 4261 may not be able to recover in time. At this time, the elastic member 4264 is used to push the sliding piece 4263 to apply an outward tension to the clamping piece 4261 from the inside, thereby facilitating the opening of the slot 4265, and also quickly pushing the block 4271 away from the slot 4265, so that the second connecting rod 427 and the middle connecting rod 426 can be quickly separated.

[0060] The conventional planetary gear train 420 is provided with only three planetary gears 422, and the three planetary gears 422 are evenly arranged, but the planetary gear train 420 can only meet a certain range of power parameter requirements. This embodiment designs a planetary gear train 420, which can meet more power parameter requirements. Specifically, see Figure 6The planetary gear train 420 disclosed in this embodiment includes a plurality of planetary gears 422, which are divided into more than three groups around the circumference of the sun gear 421, and the more than three groups of planetary gears 422 are evenly arranged along the circumference of the sun gear 421. Among them, the number of planetary gears 422 in each group is different, and the number of planetary gears 422 in each group is arranged according to a certain rule. The number of planetary gears 422 in the latter group is more than the number of planetary gears 422 in the former group, and the number of the planetary gears 422 that differ is consistent. Of course, since each group is evenly arranged along the circumference of the sun gear 421, although the first group and the last group are adjacent, the number of planetary gears 422 in the last group is more than the number of planetary gears 422 in the first group.

[0061] The intervals between the planetary gears 422 in each group are equal, and the distance between two adjacent planetary gears 422 in the same group is smaller than the distance between the planetary gears 422 between two adjacent groups.

[0062] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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. A torque testing device, characterized in that: include: Chassis; A driving shaft, the driving shaft being rotatably connected to the chassis; A first transmission assembly, one end of which is connected to the driving shaft, and the other end of which is used to drive the test shaft; A second transmission assembly, one end of which is connected to the driving shaft, and the other end of which is used to drive the test shaft; as well as A torque sensor, the torque sensor is used to detect the torque on the test shaft; The first transmission assembly comprises: A driving motor, which is mounted on the chassis and is drivingly connected to the driving shaft; A first gear, the first gear being mounted on the driving shaft; and a second gear, the second gear meshing with the first gear and connected to the test shaft; The second transmission assembly comprises: Planetary gear train; A torque loading motor, the torque loading motor is drivingly connected to the sun gear of the planetary gear train; a third gear, the third gear being mounted on the driving shaft and connected to the planetary gear of the planetary gear train via a connecting frame; and a fourth gear, the fourth gear being meshed with the ring gear of the sun gear train and connected to the test shaft; The sun gear is provided with a coaxial first connecting rod and an intermediate connecting rod, the intermediate connecting rod is rotatably connected to the first connecting rod, and the connecting frame is provided with a second connecting rod, the second connecting rod is coaxially arranged with the first connecting rod, and the second connecting rod is engaged with the intermediate connecting rod; The end of the intermediate connecting rod away from the first connecting rod is provided with a clamping groove, and the end of the second connecting rod away from the connecting frame is provided with a clamping block, and the clamping block is engaged with the clamping block; The clamping block is spherical, and a plurality of clamping sheets and a clamping ring are arranged on the intermediate connecting rod. The plurality of clamping sheets are arranged at intervals along the circumference of the intermediate connecting rod, and one end of the clamping sheet away from the intermediate connecting rod is inclined inwardly along the axis of the intermediate connecting rod. The plurality of clamping sheets surround the clamping groove, and the clamping ring is sleeved outside the clamping sheet, and the clamping ring is threadedly connected to the clamping sheet; The middle connecting rod is also provided with a slide and an elastic member. The slide is located in the slot and slidingly cooperates with the slot. The two ends of the elastic member are respectively connected to the middle connecting rod and the slide. The elastic member enables the slide to have a tendency to move out of the slot, and the diameter of the slide is smaller than the minimum diameter of the slot.

2. The torque testing device according to claim 1, characterized in that: Also included is a clamping gear meshing with the ring gear.

3. The torque testing device according to claim 1, characterized in that: There are multiple planetary gears, which are divided into more than three groups along the circumference of the sun gear. The more than three groups of planetary gears are evenly arranged along the circumference of the sun gear, and the number of planetary gears in each group gradually increases along the circumference of the sun gear.

4. The torque testing device according to claim 3, characterized in that: The distance between two adjacent planetary wheels in the same group is smaller than the distance between the planetary wheels between two adjacent groups.

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