Concentric torque testing machine gearbox

Abstract

The utility model relates to the technical field of torque testers, in particular to a concentric torque tester gearbox, which comprises a box body, an input shaft and an output shaft are coaxially and rotatably mounted in the box body, a plurality of transmission shafts are annularly arrayed in the box body around the axis of the input shaft, and a primary driving gear and a secondary driven gear are respectively sleeved on the input shaft and the output shaft. The transmission shaft is axially sleeved with a first-stage driven gear and a second-stage driving gear in a spaced mode, the first-stage driving gear is meshed with the first-stage driven gear, and the second-stage driving gear is meshed with the second-stage driven gear. Through the arrangement, the input torque is shunted from the first-stage driving gear to the first-stage driven gears and then is gathered to the second-stage driven gears, so that the pressure-bearing load of a gear meshing point is reduced, the gear abrasion is reduced, and the service life of equipment is prolonged; the input shaft and the output shaft are coaxially arranged, and all devices are distributed around the axes of the input shaft and the output shaft, so that the structure of the gearbox is more compact, and the occupied volume of the gearbox in the torque tester can be greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of torque testers, in particular to a concentric torque tester gear box. Background Art

[0002] The torque test system is a precision instrument used to detect and calibrate various instruments. It mainly includes a host, a drive transmission device, a measurement and control system, and a computer. During the test, the computer sends instructions to the control unit, so that the servo motor synchronously drives the reducer to drive the chuck to rotate. When the chuck rotates, torque is applied to the sample. This torque is reacted to the torque sensor on the chuck through the sample, and then input into the computer to obtain the measured torque.

[0003] The driving transmission device mainly includes a reducer and a servo motor that provides drive. The reducer is also called a reduction gearbox. The conventional design is single-stage transmission, that is, the gears are meshed in sequence. This transmission method makes a single gear bear a large load, especially when the reducer has a small gear input and a large gear input. The load is concentrated at the meshing point of the large and small gears, which can easily cause gear wear and reduce the service life of the equipment. In addition, the gear shafts of traditional gearboxes are staggered, which makes the reducer bulky, making the torque tester larger.

[0004] To this end, the utility model provides a concentric torque testing machine gear box to reduce gear wear and equipment size. Utility Model Content

[0005] The utility model aims to solve the problems existing in the prior art and proposes a concentric torque testing machine gear box.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A concentric torque testing machine gearbox comprises a detachable box body, wherein an input shaft and an output shaft are coaxially rotatably mounted in the box body, a plurality of transmission shafts are distributed in a circular array outside the output shaft, the transmission shaft is rotatably mounted in the box body, a primary driving gear and a secondary passive gear are respectively sleeved on the input shaft and the output shaft, a primary passive gear and a secondary driving gear are axially spaced and sleeved on the transmission shaft, the primary driving gear is meshed with the primary passive gear, and the secondary driving gear is meshed with the secondary passive gear.

[0008] Preferably, the box body is cylindrical.

[0009] Preferably, the box body comprises a lower box body, a middle box body and an upper box body, the upper box body is detachably mounted on the upper port of the upper box body, the middle box body is detachably mounted on the inner wall of the lower box body, and the middle box body is provided with a through hole for the transmission shaft to pass through.

[0010] Preferably, the diameter of the through hole is larger than the tooth diameter of the secondary driving gear.

[0011] Preferably, a cylindrical roller bearing is sleeved in the through hole on the outer wall of the transmission shaft, and elastic retaining rings are provided on both end surfaces of the cylindrical roller bearing between the through hole and the sleeve.

[0012] Preferably, the inner wall of the lower box body is provided with a mounting ring, and the middle box body is detachably mounted on the mounting ring.

[0013] Preferably, a built-in ring is provided at the port of the lower box body, and the upper box body is embedded in the built-in ring.

[0014] Compared with the prior art, the utility model provides a concentric torque testing machine gearbox, which has the following beneficial effects:

[0015] When in use, the input shaft inputs power to drive the first-stage driving gear to rotate, the first-stage driving gear drives the three first-stage passive gears to rotate, and the three second-stage driving gears then jointly drive the output shaft to rotate. In this way, the input torque is diverted from the first-stage driving gear to multiple first-stage passive gears, thereby reducing the pressure load on the gear meshing point at the input, thereby reducing gear wear and increasing the service life of the equipment.

[0016] The input shaft and the output shaft are coaxially arranged so that each device is distributed around the axis of the two. Compared with the traditional input shaft, transmission shaft, and output shaft that are spaced apart, the structure of the gearbox in this solution is more compact, which can greatly reduce the volume occupied by the gearbox in the torque tester, thereby reducing the size of the torque tester and improving the convenience of carrying and transporting. As the size is reduced, the weight is adaptively reduced, which is convenient for transport.

[0017] Other advantages, objectives and features of the present invention will be described in the following description to some extent; and will be apparent to those skilled in the art based on the following examination and study to some extent; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a plan view of the utility model.

[0019] Figure 2 For the utility model Figure 1 Cross-sectional view at AA.

[0020] Figure 3 It is a schematic diagram of gear meshing of the utility model.

[0021] Figure 4 This is a schematic diagram of the box structure of the utility model.

[0022] Figure 5 For the utility model Figure 2 Local schematic diagram of point A.

[0023] Figure 6 This is a schematic diagram of the optimized structure of the box body of the utility model.

[0024] In the figure: 1. lower housing; 2. middle housing; 3. upper housing; 4. input shaft; 5. output shaft; 6. transmission shaft; 7. primary driving gear; 8. primary passive gear; 9. secondary driving gear; 10. secondary passive gear; 11. internal ring; 12. elastic retaining ring; 13. cylindrical roller bearing; 14. mounting ring; 15. guide hole; 16. guide column. DETAILED DESCRIPTION

[0025] The following will be combined with the attached embodiment of the present utility model Figure 1-6 , the technical solutions in the embodiments of the utility model are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0026] In order to solve the problems existing in the prior art, the present embodiment provides a concentric torque testing machine gearbox, including a detachable housing, in which an input shaft 4 and an output shaft 5 are coaxially rotatably installed, a plurality of transmission shafts 6 are distributed in an annular array outside the output shaft 5, and the transmission shaft 6 is rotatably installed in the housing, and a primary driving gear 7 and a secondary passive gear 10 are respectively sleeved on the input shaft 4 and the output shaft 5, and a primary passive gear 8 and a secondary driving gear 9 are axially spaced on the transmission shaft 6, the primary driving gear 7 is meshed with the primary passive gear 8, and the secondary driving gear 9 is meshed with the secondary passive gear 10.

[0027] Principle details of this embodiment:

[0028] A concentric torque tester gearbox comprises a box body, which can be disassembled to facilitate installation of internal components. An input shaft 4 and an output shaft 5 are coaxially rotatably installed in the box body. The input shaft 4 and the output shaft 5 are spaced apart at opposite ends and penetrate two end surfaces of the box body at opposite ends. A plurality of transmission shafts 6 are arranged in a circular array around the axis of the input shaft 4 in the box body. A primary driving gear 7 is sleeved on the input shaft 4. A primary passive gear 8 and a secondary driving gear 9 are axially spaced apart on the transmission shaft 6. A secondary passive gear 10 is sleeved on the output shaft 5. The primary driving gear 7 is meshed with the primary passive gear 8, and the secondary driving gear 9 is meshed with the secondary passive gear 10.

[0029] When in use, the input shaft 4 inputs power to drive the primary driving gear 7 to rotate, the primary driving gear 7 drives the three primary passive gears 8 meshing therewith to rotate, thereby driving the three transmission shafts 6 to rotate, the three transmission shafts 6 then drive the secondary driving gear 9 to rotate, and the three secondary driving gears 9 then jointly drive the output shaft 5 to rotate, so that the input torque is diverted from the primary driving gear 7 to multiple primary passive gears 8, thereby reducing the pressure load on the gear meshing point at the input, thereby reducing gear wear and increasing the service life of the equipment; in addition, the input shaft 4 and the output shaft 5 are coaxially arranged, so that each device is distributed around the axis of the two. Compared with the traditional input shaft 4, transmission shaft 6, and output shaft 5, the structure of the gear box in this solution is more compact, which can greatly reduce the volume occupied by the gear box in the torque tester, thereby reducing the size of the torque tester, and improving the convenience of carrying and transporting. As the size is reduced, the weight is adaptively reduced, which is convenient for transport.

[0030] In a further embodiment of the present solution, the box body is cylindrical, and compared with the square shape, the cylindrical shape occupies a smaller space.

[0031] In a further embodiment of the present scheme, the box body includes a lower box body 1, a middle box body 2, and an upper box body 3. The upper box body 3 can be detachably mounted on the upper port of the upper box body 3, and the middle box body 2 can be detachably mounted on the inner wall of the lower box body 1. With the middle box body 2 as the boundary, both ends of the input shaft 4 are rotatably mounted on the upper box body 3 and the middle box body 2, respectively, both ends of the output shaft 5 are rotatably mounted on the middle box body 2 and the lower box body 1, and both ends of the transmission shaft 6 are rotatably mounted on the upper box body 3 and the lower box body 1, respectively. A through hole is provided on the middle box body 2 for the transmission shaft 6 to pass through, thereby achieving the purpose of the detachable box body and displaying the installation status of the input shaft 4, the output shaft 5, and the transmission shaft 6.

[0032] In a further embodiment of the present solution, the diameter of the through hole is larger than the tooth diameter of the secondary driving gear 9 and larger than the outer diameter of the mounting bearing of the transmission shaft 6, so as to facilitate insertion and installation.

[0033] In a further embodiment of the present scheme, a cylindrical roller bearing 13 is sleeved in the through hole on the outer wall of the transmission shaft 6, and elastic retaining rings 12 are provided on both end surfaces of the cylindrical roller bearing 13 between the through hole and the sleeve. The first-stage passive gear 8 and the second-stage active gear 9 are respectively located on the opposite sides of the two elastic retaining rings 12, and are separated by the middle box 2, so that the transmission states of the gears at both ends of the transmission shaft 6 do not interfere with each other. At the same time, the cylindrical roller bearing 13 is used to provide auxiliary support for the middle part of the transmission shaft 6 to improve the installation and transmission stability. The existence of the elastic retaining ring 12 limits the cylindrical roller bearing 13 to prevent slippage.

[0034] In a further embodiment of the present solution, a mounting ring 14 is provided on the inner wall of the lower box body 1 , and the middle box body 2 can be detachably mounted on the mounting ring 14 , providing a mounting base surface for the middle box body 2 .

[0035] In a further embodiment of the present scheme, a built-in ring 11 is provided at the port of the lower housing 1, and the upper housing 3 is embedded in the built-in ring 11. The upper housing 3 is restricted by the built-in ring 11, which can effectively avoid the torsional deviation of the upper housing 3, ensure that the relative position between the upper housing 3 and the lower housing 1 is fixed, and increase the stability of the gearbox.

[0036] Preferably, since the middle box body 2 and the upper box body 3 are fastened to the lower box body 1 by countersunk screws, during disassembly and assembly, it is necessary to screw and disassemble the fasteners of the upper box body 3 and the middle box body 2 one by one, which is relatively cumbersome and troublesome. Therefore, a plurality of guide holes 15 can be arranged in a circular array on the middle box body 2, and a guide column 16 is arranged on the bottom wall of the upper box body 3. The axial diameter of the guide column 16 changes in steps, that is, the lower end is small and the upper end is large. During installation, after the middle box body 2 is placed on the mounting ring 14, the upper box body 3 is buckled, and the small diameter end of the guide column 16 is inserted into the guide hole 15, and the connection between the large diameter end and the small diameter end of the guide column 16 is against the end face of the middle box body 2. After the upper box body 3 is fixed by the fasteners, the middle box body 2 is also fixed under the restriction of the mounting ring 14 and the guide column 16, thereby simplifying the installation steps and reducing the operating burden of the technician.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0039] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A concentric torque testing machine gearbox, characterized in that: The invention comprises a detachable housing, wherein an input shaft (4) and an output shaft (5) are coaxially rotatably mounted in the housing, a plurality of transmission shafts (6) are distributed in an annular array outside the output shaft (5), the transmission shaft (6) is rotatably mounted in the housing, a primary driving gear (7) and a secondary passive gear (10) are sleeved on the input shaft (4) and the output shaft (5) respectively, a primary passive gear (8) and a secondary driving gear (9) are sleeved on the transmission shaft (6) at axial intervals, the primary driving gear (7) is meshed with the primary passive gear (8), and the secondary driving gear (9) is meshed with the secondary passive gear (10).

2. A concentric torque testing machine gearbox according to claim 1, characterized in that: The box body is cylindrical.

3. A concentric torque testing machine gearbox according to claim 2, characterized in that: The box body comprises a lower box body (1), a middle box body (2), and an upper box body (3); the upper box body (3) is detachably mounted on an upper port of the upper box body (3); the middle box body (2) is detachably mounted on an inner wall of the lower box body (1); and the middle box body (2) is provided with a through hole for a transmission shaft (6) to pass through.

4. A concentric torque testing machine gearbox according to claim 3, characterized in that: The diameter of the through hole is larger than the tooth diameter of the secondary driving gear (9).

5. The concentric torque testing machine gearbox according to claim 3, characterized in that: A cylindrical roller bearing (13) is sleeved in a through hole on the outer wall of the transmission shaft (6), and elastic retaining rings (12) are provided on both end surfaces of the cylindrical roller bearing (13) between the through hole and the sleeve.

6. The concentric torque testing machine gearbox according to claim 3, characterized in that: The inner wall of the lower box body (1) is provided with a mounting ring (14), and the middle box body (2) is detachably mounted on the mounting ring (14).

7. The concentric torque testing machine gearbox according to claim 3, characterized in that: An internal ring (11) is provided at the port of the lower box body (1), and the upper box body (3) is embedded in the internal ring (11).

Images