Torque testing device for expansion sleeve

Abstract

The utility model relates to the field of torque testing, in particular to an expansion sleeve torque testing device which comprises a support, a transmission mechanism, a driving mechanism and a testing mechanism. The testing mechanism comprises a mounting table, a spline housing, a spline shaft, a connecting disc and a pressure sensor, the mounting table is mounted on the support, the spline housing is mounted on the mounting table and rotates relative to the mounting table, two ends of the transmission mechanism are connected with the spline housing and the driving mechanism respectively, and one end of the spline shaft is inserted into the spline housing and meshed with the spline housing; the connecting disc is fixedly connected to the mounting table and sleeves one end, away from the spline housing, of the spline shaft, the expansion sleeve is mounted on one side of the connecting disc to enable the connecting disc to abut against the circumferential surface of the spline shaft, and the pressure sensor is mounted at the joint of the support and the driving mechanism to measure pressure of the driving mechanism on the support. According to the expansion sleeve torque testing device, the expansion sleeve to be tested can be replaced conveniently, and the detection efficiency can be improved.

Description

Technical Field

[0001] This application relates to the technical field of torque testing, and particularly relates to a torque testing device for a shrink disc. Background Art

[0002] A shrink disc is a keyless connection device. Its principle and use are to generate a huge clamping force between the inner ring and the shaft, and between the outer ring and the hub through the action of high-strength tension bolts, so as to achieve a keyless connection between the machine part and the shaft. In order to prevent defective shrink discs from entering the market, a torque testing device for shrink discs is necessary.

[0003] In the prior art, the torque testing device for a shrink disc includes a transmission mechanism, a fixed shaft, a mating shaft, a coupling, and a torque sensor. The first mating shaft is connected to the output end of the transmission mechanism through the first coupling. The second mating shaft is connected to one end of the fixed shaft through the second coupling. The first mating shaft and the second mating shaft are coaxial, and the end of the first mating shaft away from the transmission mechanism abuts against the end of the second mating shaft away from the fixed shaft. The torque sensor is connected to the transmission mechanism. First, the shrink disc is simultaneously sleeved on the first mating shaft and the second mating shaft and the two mating shafts are clamped. Then, the transmission mechanism outputs a driving force and gradually increases the output value of the driving force, and observes whether the shrink disc and the second mating shaft rotate relative to each other. When rotation occurs, it is the maximum torque point. Finally, data is collected through the torque sensor.

[0004] When the above-mentioned torque testing device for a shrink disc is in use, the shrink disc needs to be simultaneously sleeved on the first mating shaft and the second mating shaft and the two mating shafts are clamped. Each time a shrink disc to be tested is replaced, the first mating shaft and the second mating shaft need to be correspondingly removed from the transmission mechanism and the fixed shaft first. The original shrink disc is loosened to facilitate the separation of the first mating shaft and the second mating shaft. After removing the shrink disc, another shrink disc to be tested is sleeved on one of the mating shafts. Subsequently, the other mating shaft is abutted against the mating shaft sleeved with the shrink disc, and the shrink disc to be tested is toggled so that it is simultaneously sleeved on the two mating shafts, and then the shrink disc to be tested is locked to clamp the two mating shafts. Finally, the first mating shaft and the second mating shaft are correspondingly connected to the transmission mechanism and the fixed shaft through the couplings for the next round of detection. Therefore, it is inconvenient to replace the shrink disc to be tested with the above-mentioned torque testing device for a shrink disc, and the detection efficiency is relatively low. Content of the Utility Model

[0005] In order to solve the above-mentioned existing technical problems, this application provides a torque testing device for a shrink disc, which is convenient to replace shrink discs of the same specification or different specifications, and has a high detection efficiency.

[0006] This application provides a torque testing device for a shrink disc, adopting the following technical solutions:

[0007] A tightening sleeve torque testing device, characterized in that it comprises a bracket, a transmission mechanism, a driving mechanism and a testing mechanism installed on the bracket; the testing mechanism includes a mounting table, a spline sleeve, a spline shaft, a coupling disc and a pressure sensor, the mounting table is installed on the bracket, the spline sleeve is installed on the mounting table and rotates relative to the mounting table, both ends of the transmission mechanism are respectively connected to the spline sleeve and the driving mechanism, one end of the spline shaft is inserted into the spline sleeve and meshes with the spline sleeve; the coupling disc is fixedly connected to the mounting table and sleeved on one end of the spline shaft away from the spline sleeve, the tightening sleeve is installed on one side of the coupling disc to press the coupling disc against the circumferential surface of the spline shaft, and the pressure sensor is installed at the connection between the bracket and the driving mechanism to measure the pressure of the driving mechanism on the bracket.

[0008] By adopting the above technical solution, the driving mechanism applies a driving force to the transmission mechanism, the pressure sensor records the value of the driving force, the transmission mechanism outputs the driving force to the spline sleeve to drive the spline sleeve to rotate, the spline sleeve drives the spline shaft to rotate, and it is observed whether there is relative rotation between the coupling disc and the spline shaft. When there is relative rotation between the coupling disc and the spline shaft, it is equivalent to the rotation of the tightening sleeve, so as to detect the maximum torque of the tightening sleeve; when replacing the tightening sleeve to be tested with the same specification, only need to remove the tested tightening sleeve from the coupling disc and reinstall the tightening sleeve to be tested; when replacing the tightening sleeve with different specifications, only need to replace the coupling disc and install the tightening sleeve on the coupling disc, which improves the detection efficiency of the tightening sleeve torque testing device.

[0009] Preferably, a first connection hole is provided on the tightening sleeve, a first bolt is inserted through the first connection hole, a first mating hole is provided on the coupling disc, and one end of the first bolt passes through the connection hole and is installed in the first mating hole to press the tightening sleeve against the coupling disc.

[0010] By adopting the above technical solution, the first bolt presses the tightening sleeve against the coupling disc, thereby pressing the coupling disc against the spline shaft. Its structure is simple, and the threaded connection method has a good locking effect, which can effectively ensure the detection accuracy of the maximum torque of the tightening sleeve.

[0011] Preferably, the mounting table includes a housing and a flange, the housing is fixedly installed on the bracket, the spline sleeve is installed on the housing and rotates relative to the housing, the flange is installed on one side of the housing, and the coupling disc is installed on the side of the flange away from the housing.

[0012] By adopting the above technical solution, the coupling disc is installed on the flange, which is convenient for the operator to replace the coupling disc according to needs to meet the measurement of different tightening sleeves.

[0013] Preferably, a second connection hole is formed in the connection disk, a second bolt is inserted through the second connection hole, a second mating hole is formed in the flange, and one end of the second bolt passes through the second connection hole and is installed in the second mating hole to fixedly connect the connection disk to the flange.

[0014] By adopting the above technical solution, the second bolt connects the connection disk and the flange together. The structure is simple, and the threaded connection method has a good locking effect, which can effectively ensure the accuracy of the maximum torque detection of the expansion sleeve.

[0015] Preferably, the connection disk is provided with a gasket assembly, the gasket assembly is inserted and installed in the second connection hole, and one end of the second bolt passes through the gasket assembly and is inserted and installed in the second mating hole.

[0016] By adopting the above technical solution, the gasket assembly acts as a gasket for the second bolt, reducing the wear between the second bolt and the second connection hole.

[0017] Preferably, the gasket assembly includes a bushing and a pin sleeve. The pin sleeve is sleeved on the second bolt and abuts against the flange. The bushing is sleeved on the outer peripheral surface of the pin sleeve and abuts against the inner wall of the second connection hole. One end of the bushing abuts against the pin sleeve.

[0018] By adopting the above technical solution, the pin sleeve has a stronger ability to withstand the wear of the second bolt, extending the service life of the gasket assembly.

[0019] Preferably, a convex ring that abuts against the flange is provided on the outer peripheral surface of the pin sleeve. The gasket assembly further includes a washer. The washer is sleeved on the pin sleeve and abuts against the convex ring. The side of the washer away from the convex ring abuts against the bushing.

[0020] By adopting the above technical solution, the convex ring increases the contact surface between the pin sleeve and the flange, and the washer increases the contact surface between the bushing and the convex ring, thereby increasing the connection stability between the pin sleeve and the bushing.

[0021] Preferably, a groove is formed in the flange, and one end of the pin sleeve is clamped in the groove.

[0022] By adopting the above technical solution, the groove defines the position of the pin sleeve on the flange, facilitating the reduction of the displacement of the pin sleeve when it abuts against the flange.

[0023] Preferably, an installation cavity for installing the expansion sleeve is formed in the connection disk.

[0024] By adopting the above technical solution, the expansion sleeve is installed in the installation cavity of the connection disk, facilitating the operator to accurately locate the installation position of the expansion sleeve on the connection disk.

[0025] Preferably, first key teeth are arranged on the outer peripheral surface of the spline sleeve, second key teeth are arranged on the transmission mechanism, and the first key teeth are meshed and connected with the second key teeth.

[0026] By adopting the above technical solution, the transmission mechanism and the spline sleeve are meshed and connected together through the first key teeth and the second key teeth, so that the transmission mechanism drives the spline sleeve to rotate.

[0027] In summary, the present application has the following beneficial effects:

[0028] 1. Since the torque testing device of the expansion sleeve in the present application abuts the coupling disk against the spline shaft, then installs the expansion sleeve on one side of the coupling disk and presses the coupling disk against the spline shaft, and observes whether there is relative rotation between the coupling disk and the spline shaft, which is equivalent to whether the expansion sleeve rotates, so as to detect the maximum torque of the expansion sleeve; to continue detecting expansion sleeves of the same specification, only need to replace the expansion sleeve to be tested on the coupling disk; to detect expansion sleeves of different specifications, only need to replace the coupling disk and reinstall the expansion sleeve, which improves the detection efficiency of the expansion sleeve torque testing device;

[0029] 2. In the present application, the expansion sleeve is threadedly connected to the coupling disk through the first bolt, and the coupling disk is threadedly connected to the flange through the second bolt. Since the threaded connection method has a good locking effect, it can effectively ensure the accuracy of detecting the maximum torque of the expansion sleeve;

[0030] 3. In the present application, through the arrangement of the pin sleeve, the bushing and the spacer ring, the wear between the second bolt and the second connection hole is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a front view structural schematic diagram of the expansion sleeve torque testing device of the present application.

[0032] Figure 2 is a right view structural schematic diagram of the expansion sleeve torque testing device of the present application.

[0033] Figure 3 is Figure 2 an enlarged schematic diagram at A of

[0034] Figure 4 is Figure 2 an enlarged schematic diagram at B of

[0035] Figure 5 is Figure 2 an enlarged schematic diagram at C of

[0036] DESCRIPTION OF REFERENCE NUMERALS:

[0037] 1. Bracket; 2. Driving mechanism; 3. Transmission mechanism; 31. Support rod; 32. Second key tooth; 4. Testing mechanism; 41. Mounting table; 411. Housing; 4111. Support seat; 4112. Cylinder; 412. Flange; 4121. Second mating hole; 4122. Groove; 42. Spline sleeve; 421. First key tooth; 422. Third key tooth; 423. Bush; 43. Spline shaft; 431. Fourth key tooth; 44. Connecting plate; 441. First mating hole; 442. Second connecting hole; 443. Second bolt; 445. Fixed part; 446. Connecting part; 447; Tightening part; 448. Installation cavity; 4481. Installation surface; 45. Pressure sensor; 46. Gasket assembly; 461. Bushing; 462. Pin sleeve; 4621. Convex ring; 463. Pad ring; 5. Expansion sleeve; 51. First connecting hole; 52. First bolt. Detailed implementation mode

[0038] In order to make the purpose, technical solution and advantages of the present application clearer, the following will Figures 1-5 be further described in detail in conjunction with the attached drawings

[0039] The embodiment of the present application discloses a torque testing device for an expansion sleeve. Refer to Figure 1 , which includes a bracket 1, a driving mechanism 2, a transmission mechanism 3 and a testing mechanism 4.

[0040] Refer to Figure 1 and Figure 2 , the testing mechanism 4 includes a mounting table 41, a spline sleeve 42, a spline shaft 43, a connecting plate 44 and a pressure sensor 45. The mounting table 41 is fixedly installed on the bracket 1 through fasteners such as bolts. The spline sleeve 42 is installed in the mounting table 41 and rotates relative to the mounting table 41.

[0041] The driving mechanism 2 is installed on the bracket 1 and is located on one side of the mounting table 41. The transmission mechanism 3 is installed between the driving mechanism 2 and the mounting table 41. The two ends of the transmission mechanism 3 are respectively connected to one end of the spline sleeve 42 and one end of the driving mechanism 2. One end of the spline shaft 43 is inserted into the spline sleeve 42 and meshes with the spline sleeve 42. The connecting plate 44 is installed on one side of the mounting table 41 and abuts against the circumferential surface of the other end of the spline shaft 43. The expansion sleeve 5 is installed on one side of the connecting plate 44 to press the connecting plate 44 against the circumferential surface of the spline shaft 43. Thus, the present application can quickly disassemble and assemble expansion sleeves 5 of the same specification or different specifications, and has high detection efficiency.

[0042] When the test device of the present application detects the torque of the expansion sleeve 5, the driving mechanism 2 drives the transmission mechanism 3 to rotate, thereby driving the spline sleeve 42 to rotate. The rotating spline sleeve 42 further drives the spline shaft 43 to rotate, causing a static torque to be generated between the spline shaft 43 and the coupling disc 44. The expansion sleeve 5 presses the coupling disc 44 against the spline shaft 43, and the maximum static torque between the spline shaft 43 and the coupling disc 44 (the static torque when the coupling disc 44 rotates relative to the spline shaft 43) is the torque of the expansion sleeve 5 to be measured.

[0043] The driving mechanism 2 of this embodiment is fixedly installed on the bracket 1 through fasteners such as bolts. The driving mechanism 2 can be an oil jack, an electric jack or other driving components that provide driving force. In this embodiment, it is an oil jack because of its simple structure and convenient disassembly and maintenance. Moreover, it is convenient for the staff to operate, which can improve the working efficiency of the expansion sleeve torque test device.

[0044] In the actual application process, the transmission mechanism 3 is large in volume and weight. Therefore, in this embodiment, a support rod 31 is provided on the bracket 1 between the driving mechanism 2 and the mounting table 41. The support rod 31 is also fixedly installed on the bracket 1 through fixing parts such as bolts. One end of the support rod 31 abuts against the middle of the transmission mechanism 3. In this embodiment, the support rod 31 can not only support the transmission mechanism 3, reduce the influence of the self-gravity of the transmission mechanism 3 on the transmission of driving force, but also limit the excessive downward rotation of the driving mechanism 2.

[0045] The mounting table 41 includes a housing 411 and a flange 412. The housing 411 includes a support seat 4111 and a cylinder 4112. The support seat 4111 is welded to the bracket 1, and the cylinder 4112 is welded to the side of the support seat 4111 away from the bracket 1. The flange 412 is installed on one end face of the cylinder 4112 through bolts.

[0046] Refer to Figure 2 and Figure 3 As shown in [relevant figures], the spline sleeve 42 is installed in the cylinder 4112 through two bushings 423 arranged at axial intervals and rotates relative to the cylinder 4112. A first key tooth 421 is provided in the middle section of the outer peripheral surface of the spline sleeve 42, and a second key tooth 32 is provided on the transmission mechanism 3. The first key tooth 421 and the second key tooth 32 are meshed and connected, which can drive the spline sleeve 42 to rotate by the transmission mechanism 3. One bushing 423 is provided on each side of the cylinder 4112, and both bushings 423 are connected to the cylinder 4112 through bolts. A third key tooth 422 is provided on the inner peripheral surface of the spline sleeve 42, and a fourth key tooth 431 is provided at one end of the spline shaft 43. The third key tooth 422 and the fourth key tooth 431 are meshed and connected, which can drive the spline shaft 43 to rotate by the spline sleeve 42.

[0047] Refer to Figure 4 and Figure 5, the coupling disk 44 includes a fixing portion 445, a connecting portion 446, and an abutting portion 447. A plurality of second connection holes 442 are evenly spaced on the fixing portion 445 of the coupling disk 44. A plurality of gasket assemblies 46 are provided on the coupling disk 44. The gasket assembly 46 includes a bushing 461, a pin sleeve 462, and a gasket ring 463. The bushing 461 is adhesively bonded to the inner wall of the second connection hole 442. The pin sleeve 462 is sleeved and adhesively bonded in the bushing 461 and is longer than the bushing 461. A groove 4122 is provided on one side of the flange 412 close to the outer peripheral surface. One end of the pin sleeve 462 passing through the bushing 461 is clamped in the groove 4122. The pin sleeve 462 is provided with a convex ring 4621. The convex ring 4621 is located on the outer peripheral surface of the part of the pin sleeve 462 passing through the bushing 461. One side of the convex ring 4621 abuts against the flange 412. The gasket ring 463 is sleeved on the pin sleeve 462. One side of the gasket ring 463 abuts against the side of the convex ring 4621 away from the flange 412. The other side of the gasket ring 463 abuts against one end of the bushing 461. The other side of the gasket ring 463 also abuts against the fixing portion 445 of the coupling disk 44.

[0048] A second mating hole 4121 is provided on one side of the flange 412 close to the outer peripheral surface. The second bolt 443 passes through the pin sleeve 462 and is installed in the second mating hole 4121. As the second bolt 443 is continuously tightened, through the cooperation between the bushing 461, the pin sleeve 462, and the gasket ring 463, the coupling disk 44 is stably connected to the flange 412.

[0049] Refer to Figure 5 , the coupling disk 44 is provided with an installation cavity 448 for installing the expansion sleeve 5, which is located between the connecting portion 446 and the abutting portion 447 of the coupling disk 44. A guiding surface 4481 is provided on one side of the connecting portion 446 of the coupling disk 44 close to the installation cavity 448. The guiding surface 4481 enlarges the opening of the installation cavity 448, thereby facilitating the rapid insertion of the expansion sleeve 5 into the installation cavity 448. A plurality of first connection holes 51 are evenly spaced on the expansion sleeve 5. A plurality of first mating holes 441 are evenly spaced on the connecting portion 446 of the coupling disk 44. One end of the first bolt 52 passes through the first connection hole 51 and is installed in the first mating hole 441. As the first bolt 52 is continuously tightened, the expansion sleeve 5 continuously presses against the abutting portion 447 of the coupling disk 44. The surface of the abutting portion 447 of the coupling disk 44 away from the expansion sleeve 5 abuts against the outer peripheral surface of one end of the spline shaft 43. As the expansion sleeve 5 continuously presses against the abutting portion 447 of the coupling disk 44, the coupling disk 44 also continuously presses against the spline shaft 43.

[0050] The implementation principle of the embodiment of this application is:

[0051] First, the pressure sensor 45 records the driving force exerted by the hydraulic jack on the transmission mechanism 3. Then, the transmission mechanism 3 drives the spline sleeve 42 through the meshing connection between the first key tooth 421 and the second key tooth 32. Next, the spline sleeve 42 drives the spline shaft 43 through the meshing connection between the third key tooth 422 and the fourth key tooth 431. The expansion sleeve 5 presses the coupling disc 44 against the spline shaft 43, and the spline shaft 43 outputs the driving force to the pressing portion 447 of the coupling disc 44. By detecting the maximum static torque between the spline shaft 43 and the coupling disc 44, the torque of the expansion sleeve 5 is measured.

[0052] To measure expansion sleeves 5 of the same specification, simply install a new expansion sleeve 5 on the coupling disc 44; to measure expansion sleeves 5 of different specifications, just replace the coupling disc 44 with a new specification, which improves the working efficiency of the expansion sleeve torque testing device.

[0053] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A torque testing device for a shrink fit bushing (5), characterized in that: It includes a bracket (1), a transmission mechanism (3), a driving mechanism (2) and a testing mechanism (4) mounted on the bracket (1); the testing mechanism (4) includes a mounting table (41), a spline sleeve (42), a spline shaft (43), a coupling disc (44) and a pressure sensor (45). The mounting table (41) is mounted on the bracket (1), the spline sleeve (42) is mounted on the mounting table (41) and rotates relative to the mounting table (41). Both ends of the transmission mechanism (3) are respectively connected to the spline sleeve (42) and the driving mechanism (2). One end of the spline shaft (43) is inserted into the spline sleeve (42) and meshes with the spline sleeve (42); the coupling disc (44) is fixedly connected to the mounting table (41) and sleeved on one end of the spline shaft (43) away from the spline sleeve (42). A shrink disc (5) is mounted on one side of the coupling disc (44) to press the coupling disc (44) against the circumferential surface of the spline shaft (43). The pressure sensor (45) is mounted at the connection between the bracket (1) and the driving mechanism (2) to measure the pressure of the driving mechanism (2) on the bracket (1).

2. The torque testing device for the expansion sleeve (5) according to claim 1, characterized in that: A first connection hole (51) is formed in the shrink disc (5), a first bolt (52) is inserted through the first connection hole (51), and a first mating hole (441) is formed in the coupling disc (44). One end of the first bolt (52) passes through the first connection hole (51) and is installed in the first mating hole (441) to press the shrink disc (5) against the coupling disc (44).

3. The torque testing device for the expansion sleeve (5) according to claim 1, characterized in that: The mounting table (41) includes a housing (411) and a flange (412). The housing (411) is fixedly mounted on the bracket (1), the spline sleeve (42) is mounted on the housing (411) and rotates relative to the housing (411). The flange (412) is mounted on one side of the housing (411), and the coupling disc (44) is mounted on the side of the flange (412) away from the housing (411).

4. The torque testing device for the expansion sleeve (5) according to claim 3, characterized in that: A second connection hole (442) is formed in the coupling disc (44), a second bolt (443) is inserted through the second connection hole (442), and a second mating hole (4121) is formed in the flange (412). One end of the second bolt (443) passes through the second connection hole (442) and is installed in the second mating hole (4121) to fixedly connect the coupling disc (44) to the flange (412).

5. The torque testing device for the expansion sleeve (5) according to claim 4, characterized in that: The coupling disc (44) is provided with a gasket assembly (46), the gasket assembly (46) is inserted through the second connection hole (442), and one end of the second bolt (443) passes through the gasket assembly (46) and is installed in the second mating hole (4121).

6. The torque testing device for the expansion sleeve (5) according to claim 5, characterized in that: The gasket assembly (46) includes a bushing (461) and a pin sleeve (462). The pin sleeve (462) is sleeved on the second bolt (443) and abuts against the flange (412). The bushing (461) is sleeved on the outer peripheral surface of the pin sleeve (462) and abuts against the inner wall of the second connection hole (442). One end of the bushing (461) abuts against the pin sleeve (462).

7. The torque testing device for the expansion sleeve (5) according to claim 6, characterized in that: The outer peripheral surface of the pin sleeve (462) is provided with a convex ring (4621) that abuts against the flange (412). The gasket assembly (46) further includes a gasket ring (463). The gasket ring (463) is sleeved on the pin sleeve (462) and abuts against the convex ring (4621). The side of the gasket ring (463) away from the convex ring (4621) abuts against the bushing (461).

8. The torque testing device for the expansion sleeve (5) according to claim 7, characterized in that: A groove (4122) is formed in the flange (412). One end of the pin sleeve (462) is clamped in the groove (4122).

9. The torque testing device for the expansion sleeve (5) according to claim 1, characterized in that: An installation cavity (448) for installing the expansion sleeve (5) is formed in the connection disk (44).

10. The torque testing device for the expansion sleeve (5) according to claim 1, characterized in that: First key teeth (421) are provided on the outer peripheral surface of the spline sleeve (42), and second key teeth (32) are provided on the transmission mechanism (3). The first key teeth (421) and the second key teeth (32) are meshed and connected.

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