Double-support internal expansion type clamp

Abstract

The utility model relates to the technical field of dynamic balance, in particular to a double-support internal expansion type clamp which comprises a torque converter and an internal support assembly for fixing the torque converter. The inner supporting assembly comprises a bottom cover, a receiving disc and an expansion piece, the torque converter is coaxially arranged on the circumferential side wall of the expansion piece, and the bottom wall of the torque converter abuts against the top wall of the receiving disc; a center hole is formed in the circle center position of the end face of the torque converter, an upper abutting part and a lower abutting part are arranged in the torque converter along the inner wall of the center hole, and the expansion piece stretches into the center hole to abut against the upper abutting part and the lower abutting part. The designed inner supporting assembly and the expansion piece abut against the upper abutting portion and the lower abutting portion, fixing of the torque converter is achieved, the connecting disc supports the torque converter, when dynamic balance checking is conducted on the torque converter, a dynamic balancing machine drives the bottom cover to rotate, the bottom cover drives the expansion piece to rotate, the torque converter synchronously rotates along with the expansion piece, and therefore the dynamic balance checking is conducted on the torque converter. Relative movement of the upper abutting part and the lower abutting part is avoided, and the dynamic balance checking quality of the torque converter is improved.

Description

Technical Field

[0001] The present application relates to the technical field of tooling fixtures, and in particular to a double-support internal expansion fixture. Background Art

[0002] As an important component of modern engineering machinery transmission, the torque converter not only has the function of transmitting torque, but also can change the size of torque. Especially in large-scale engineering machinery, the use of torque converters is very common. Due to various factors, such as uneven materials, process errors, uneven deformation of turbine blades, uneven wear or local block loss, the torque converter will be unbalanced during operation. This imbalance will cause the vibration of the torque converter, thereby accelerating the wear of the internal components of the torque converter and reducing the service life and efficiency of the machine.

[0003] In order to solve this problem, the torque converter needs to be dynamically balanced. Dynamic balancing is a technology that reduces the torque converter vibration caused by the eccentric centrifugal force of the center of mass or the dynamic load acting on the bearing by changing the mass distribution of the torque converter. This is usually achieved by removing weight or adding counterweights to the torque converter so that the torque converter reaches a balanced state during operation, thereby reducing vibration and wear and improving the running smoothness and efficiency of the torque converter.

[0004] Due to the mobility of the internal structure of the torque converter, the internal components are prone to shaking during the dynamic balancing check, resulting in inaccurate detection and affecting the quality of the dynamic balancing check of the torque converter. Utility Model Content

[0005] In order to improve the dynamic balancing check quality of the torque converter, the present application provides a double-support internal expansion clamp.

[0006] The double-support internal expansion clamp provided in this application adopts the following technical solution:

[0007] A double-support internal expansion clamp, comprising a torque converter and an internal support assembly for fixing the torque converter; the internal support assembly comprises a bottom cover, a receiving plate and a tightening piece, the bottom cover is fixedly connected to a dynamic balancing machine, the tightening piece is coaxially arranged on the top wall of the bottom cover, and the tightening piece is fixedly connected to the bottom cover; the receiving plate is coaxially sleeved on the circumferential side wall of the tightening piece, and the receiving plate is fixedly connected to the tightening piece; the torque converter is coaxially arranged on the circumferential side wall of the tightening piece, and the bottom wall of the torque converter abuts against the top wall of the receiving plate;

[0008] A center hole is provided at the center of the end face of the torque converter, and the center hole passes through the upper and lower ends of the torque converter. An upper abutment portion and a lower abutment portion are provided circumferentially along the inner wall of the center hole in the torque converter, and the tightening member extends into the center hole to abut against the upper abutment portion and the lower abutment portion respectively.

[0009] By adopting the above technical scheme, an inner support assembly is provided, the bottom cover is fixedly connected to the dynamic balancing machine, the expansion piece is coaxially provided on the top wall of the bottom cover, the receiving plate is fixedly connected to the side wall of the expansion piece, the expansion piece is abutted against the upper abutting part and the lower abutting part to fix the torque converter, the receiving plate supports the torque converter, and when the torque converter is dynamically balanced, the dynamic balancing machine drives the bottom cover to rotate, the bottom cover drives the expansion piece to rotate, and the torque converter rotates synchronously with the expansion piece, thereby avoiding relative movement between the upper abutting part and the lower abutting part, and facilitating improving the dynamic balancing quality of the torque converter.

[0010] In a specific possible implementation scheme, the expansion member includes a first expansion sleeve, a second expansion sleeve, an end cover, a pull rod and a reset member; the first expansion sleeve includes a first expansion portion and a first support portion, and the first expansion portion and the first support portion are integrally and coaxially arranged;

[0011] A first mounting hole is formed on the first expansion sleeve, and the first mounting hole passes through the first expansion part and the first support part. The second expansion sleeve is arranged in the first mounting hole, and the second expansion sleeve can slide along the length direction of the first mounting hole. A first expansion cone surface is arranged at one end of the first mounting hole close to the first expansion part.

[0012] The bottom wall of the first support portion is coaxially fixedly connected to the top wall of the bottom cover, and a limiting step is provided on the circumferential side wall of one end of the first support portion close to the first tightening portion, and the receiving plate is fixedly mounted on the limiting step;

[0013] The first expansion part extends into the central hole, and the circumferential side wall of the first expansion part abuts against the lower abutment part; a plurality of first expansion grooves are formed on the first expansion part.

[0014] By adopting the above technical solution, the first expansion sleeve is provided, and the bottom wall of the first supporting part is fixedly connected to the bottom cover, so that the first expansion sleeve and the bottom cover can rotate synchronously, and the receiving plate is fixedly provided on the limiting step, so that the receiving plate can be installed and fixed, and the first tightening part penetrates into the center hole and abuts against the lower bottom connecting part. When the torque converter is dynamically balanced, it is convenient to realize the synchronous rotation of the torque converter and the first expansion sleeve, avoid the relative movement between the lower abutting part and the first expansion sleeve, and improve the dynamic balance check quality of the torque converter.

[0015] In a specific implementation manner, the second expansion sleeve includes a second expansion portion and a second support portion, and the second expansion portion and the second support portion are integrally and coaxially arranged;

[0016] A second mounting hole is provided on the second expansion sleeve, and the second mounting hole passes through the second expansion part and the second support part. The pull rod is arranged in the second mounting hole, and the pull rod can slide along the length direction of the second mounting hole. A reset piece is arranged in the second mounting hole located at one end of the second support part, and a second expansion cone surface is arranged at one end of the second mounting hole close to the second expansion part.

[0017] The second support portion is coaxially arranged in the first mounting hole, and a first expansion fitting surface having the same taper as the first expansion conical surface is arranged on the second support portion, and the first expansion conical surface abuts against the first expansion fitting surface; the end cover is fixedly connected to the bottom wall of the second support portion;

[0018] The second expansion part extends into the central hole, and the circumferential side wall of the second expansion part abuts against the upper abutment part; a plurality of second expansion grooves are formed on the second expansion part.

[0019] By adopting the above technical solution, the second expansion sleeve is arranged in the first mounting hole, and the second supporting part is pulled downward so that the first expansion cone surface is tightly abutted against the first expansion fitting surface, and the first expansion groove expands under the pressure of the first expansion fitting surface, so that the first expansion part expands outward and abuts against the lower abutting part, which is convenient for realizing the abutting fixation of the lower abutting part, and further facilitates improving the dynamic balancing check quality of the torque converter.

[0020] In a specific possible implementation scheme, the pull rod includes a stretching section, a connecting section and a tightening section, wherein the stretching section, the connecting section and the tightening section are integrally coaxially arranged, one end of the connecting section is connected to the stretching section, and the other end is connected to the tightening section;

[0021] The stretching section passes through the reset member, and one end of the stretching section extending out of the end cover is threadedly connected to a limiting nut;

[0022] The abutting section extends out from the top of the second mounting hole, and the circumferential side wall of the abutting section is provided with a second expansion fitting surface having the same taper as the second expansion conical surface, and the second expansion conical surface abuts against the second expansion fitting surface.

[0023] By adopting the above technical scheme, the pull rod is arranged in the second mounting hole, and the second expansion cone surface is tightly abutted against the second expansion fitting surface by applying downward force to the stretching section, and the second expansion groove expands under the pressure of the second expansion fitting surface, so that the second expansion part expands outward and abuts against the upper abutting part, which is convenient for realizing the abutment and fixation of the upper abutting part, and then it is convenient to improve the dynamic balance quality of the torque converter; at the same time, when the dynamic balancing check is completed, the stretching section is pushed upward, so that the limit nut pushes the end cover to move upward, and the end cover pushes the second expansion sleeve to move upward until the first expansion cone surface is separated from the first expansion fitting surface, and the first expansion groove is reset, so that the first expansion part restores its original shape, so that the first expansion part is released from the abutment and fixation of the lower support part, which is convenient for realizing the separation of the torque converter and the expansion member.

[0024] In a specific possible implementation scheme, the reset member includes a washer and a disc spring, the washer and the disc spring are coaxially arranged in the second mounting hole located at one end of the second support portion, and the washer and the disc spring are coaxially sleeved on the side wall of the stretching section, the bottom of the disc spring abuts against the top wall of the end cover, the top of the disc spring abuts against the washer, and the top wall of the washer abuts against the end face of the connecting section close to one end of the stretching section.

[0025] By adopting the above technical solution, a reset member is provided, and when the dynamic balancing check is completed, the force applied to the stretching section is stopped, and the disc spring pushes the washer upward under the action of the spring restoring force, and the washer drives the connecting section to move upward, thereby causing the pull rod to move upward until the second expansion cone surface is separated from the second expansion fitting surface, and the second expansion groove is reset, so that the second expansion part recovers its original shape, thereby realizing the release of the second expansion part from the tight fixation to the upper support part, thereby facilitating the separation of the torque converter and the expansion member.

[0026] In a specific feasible implementation scheme, the side wall of the first support portion is threadedly connected with a first limiting bolt, the side wall of the second support portion is provided with a first limiting groove, one end of the first limiting bolt passes through the first support portion and is located in the first limiting groove, and the first limiting bolt can slide in the first limiting groove.

[0027] By adopting the above technical scheme, the first limiting bolt is set to slide in the first limiting groove. When the pull rod pushes the second expansion sleeve to move upward, the first limiting bolt limits the rising stroke of the first limiting groove, thereby avoiding the first expansion sleeve and the second expansion sleeve from separating, affecting the quality of dynamic balancing check; at the same time, the first limiting bolt passes through one end of the first support part and is located in the first limiting groove. When the dynamic balancing machine drives the inner support assembly to rotate, the first expansion sleeve and the second expansion sleeve rotate together, so that the upper abutment part and the lower abutment part rotate synchronously, avoiding relative movement between the upper abutment part and the lower abutment part, and facilitating improving the quality of dynamic balancing check of the torque converter.

[0028] In a specific possible implementation scheme, the side wall of the second support portion is threadedly connected with a second limiting bolt, the circumferential side wall of the connecting section is provided with a second limiting groove, one end of the second limiting bolt passes through the second support portion and is located in the second limiting groove, and the second limiting bolt can slide in the second limiting groove.

[0029] By adopting the above technical scheme, the second limiting bolt is set to slide in the second limiting groove. When the pull rod moves upward, the second limiting bolt limits the rising stroke of the second limiting groove, thereby avoiding the pull rod and the second expansion sleeve from being separated, affecting the quality of dynamic balancing check; at the same time, the second limiting bolt passes through one end of the second support part and is located in the second limiting groove. When the dynamic balancing machine drives the inner support assembly to rotate, the second expansion sleeve and the pull rod rotate together, thereby improving the quality of dynamic balancing check of the torque converter.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. The designed inner support assembly applies force downward to the pull rod, so that the pull rod expands the second tightening part outward to fix the upper abutting part tightly, and the pull rod drives the second expansion sleeve to move downward. The second expansion sleeve expands the first tightening part outward to fix the lower abutting part tightly, and the dynamic balancing machine drives the inner support assembly to rotate, and the inner support assembly drives the torque converter to rotate, and the upper tightening part and the lower tightening part of the torque converter rotate synchronously, avoiding relative movement and facilitating improving the dynamic balancing check effect of the torque converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of a double-support internal expansion clamp according to an embodiment.

[0033] Figure 2 It is a schematic diagram of the torque converter structure of a double-support internal expansion clamp according to an embodiment.

[0034] Figure 3 The present invention is a schematic diagram of the structure of an inner support assembly of a double-support inner expansion clamp according to an embodiment.

[0035] Figure 4 The present invention is a schematic diagram of the structure of an expansion member of a double-support internal expansion clamp according to an embodiment.

[0036] Figure 5 It is a schematic diagram of a first expansion sleeve of a double-support internal expansion clamp in an embodiment.

[0037] Figure 6 It is a schematic diagram of a second expansion sleeve of a double-support internal expansion clamp in an embodiment.

[0038] Figure 7 It is a schematic diagram of a pull rod of a double-support internal expansion clamp according to an embodiment.

[0039] Description of the drawings: 1. torque converter; 11. center hole; 12. upper abutment; 13. lower abutment; 2. inner support assembly; 21. bottom cover; 22. receiving plate; 23. expansion member; 231. first expansion sleeve; 2311. first expansion portion; 2312. first support portion; 2313. first mounting hole; 2314. first expansion cone; 2315. limiting step; 2316. first expansion groove; 2317. first limiting bolt; 232. second expansion sleeve; 2321. second expansion portion; 2322. second Support portion; 2323, second mounting hole; 2324, second expansion cone surface; 2325, first expansion fitting surface; 2326, second expansion groove; 2327, first limiting groove; 2328, second limiting bolt; 233, end cover; 234, pull rod; 2341, stretching section; 2342, connecting section; 2343, tightening section; 2344, limiting nut; 2345, second expansion fitting surface; 2346, second limiting groove; 235, reset member; 2351, washer; 2352, disc spring. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-7 This application is described in further detail.

[0041] The embodiment of the present application discloses a double-support internal expansion clamp.

[0042] Reference Figure 1 A double-support internal expansion clamp includes a torque converter 1 and an internal support assembly 2. The torque converter 1 is sleeved on the internal support assembly 2, and the internal support assembly 2 is coaxially arranged with the torque converter 1. The bottom end of the internal support assembly 2 is fixedly connected to a dynamic balancing machine. When the dynamic balancing machine drives the internal support assembly 2 to rotate, the internal support assembly 2 fixes and abuts the torque converter 1 and drives the torque converter 1 to rotate synchronously, so as to perform dynamic balancing check on the torque converter 1.

[0043] Reference Figure 1 and Figure 2 A center hole 11 is opened at the center position of the end face of the torque converter 1, and the center hole 11 passes through the upper and lower ends of the torque converter 1. The torque converter 1 is circumferentially provided with an upper abutment portion 12 and a lower abutment portion 13 on the inner wall of the center hole 11. The upper abutment portion 12 is located at the upper end of the center hole 11, and the lower abutment portion 13 is located at the lower end of the center hole 11, and the upper abutment portion 12 and the lower abutment portion 13 are both coaxially arranged with the center hole 11; the inner support assembly 2 passes through the center hole 11 and abuts against the upper abutment portion 12 and the lower abutment portion 13 respectively, so as to realize the support and fixation of the torque converter 1.

[0044] Reference Figure 1 and Figure 3The inner support assembly 2 includes a bottom cover 21, a receiving plate 22, and a tightening piece 23. The bottom wall of the bottom cover 21 is fixedly connected to the dynamic balancing machine. The tightening piece 23 is coaxially arranged on the top wall of the bottom cover 21, and the tightening piece 23 is fixedly connected to the bottom cover 21; the receiving plate 22 is coaxially sleeved on the circumferential side wall of the tightening piece 23, and the receiving plate 22 is fixedly connected to the tightening piece 23; the torque converter 1 is coaxially arranged on the circumferential side wall of the tightening piece 23, and the bottom wall of the torque converter 1 abuts against the top wall of the receiving plate 22.

[0045] Reference Figure 4 The expansion member 23 includes a first expansion sleeve 231, a second expansion sleeve 232, an end cover 233, a pull rod 234 and a reset member 235; the first expansion sleeve 231 is coaxially fixed on the top wall of the bottom cover 21, the second expansion sleeve 232 is arranged in the inner cavity of the first expansion sleeve 231, the end cover 233 is coaxially fixedly connected to the bottom end of the second expansion sleeve 232, the pull rod 234 passes through the second expansion sleeve 232, and the top of the pull rod 234 abuts against the second expansion sleeve 232, the reset member 235 is arranged in the bottom cavity of the second expansion sleeve 232, and the reset member 235 abuts against the top wall of the end cover 233.

[0046] Reference Figure 1 and Figure 5 The first expansion sleeve 231 includes a first tightening portion 2311, a first supporting portion 2312, a first mounting hole 2313 and a limiting step 2315. The first tightening portion 2311 and the first supporting portion 2312 are integrally coaxially arranged; the first mounting hole 2313 is arranged in the length direction of the central axis of the first expansion sleeve 231, and the first mounting hole 2313 passes through the first tightening portion 2311 and the first supporting portion 2312. The second expansion sleeve 232 is located in the first mounting hole 2313, and the second expansion sleeve 232 can slide along the length direction of the first mounting hole 2313. The first mounting hole 2313 is provided with a first tightening cone surface 2314 at one end close to the first tightening portion 2311, and the cross-sectional diameter of the first tightening cone surface 2314 is formed by the diameter of the first tightening cone surface 2314 being close to the first tightening portion 2311. It gradually becomes larger from one end near the first support part 2312 to the end far away from the first support part 2312; the bottom wall of the first support part 2312 is coaxially fixedly connected with the top wall of the bottom cover 21, and the limiting step 2315 is arranged on the circumferential side wall of the first support part 2312 close to one end of the first tightening part 2311, and the receiving plate 22 is fixedly installed on the limiting step 2315; a plurality of first tightening grooves 2316 are opened on the first tightening part 2311, and the plurality of first tightening grooves 2316 are evenly distributed along the circumferential side wall of the first tightening part 2311, and the plurality of first tightening grooves 2316 are parallel to the center hole 11 along the length direction; the first tightening part 2311 extends into the center hole 11, and the circumferential side wall of the first tightening part 2311 abuts against the lower abutting part 13.

[0047] Reference Figure 1 and Figure 6The second expansion sleeve 232 includes a second tightening portion 2321 and a second supporting portion 2322, and the second tightening portion 2321 and the second supporting portion 2322 are integrally arranged coaxially; a second mounting hole 2323 is opened on the second expansion sleeve 232, and the second mounting hole 2323 passes through the second tightening portion 2321 and the second supporting portion 2322, and the pull rod 234 is arranged in the second mounting hole 2323, and the pull rod 234 can slide along the length direction of the second mounting hole 2323, and the second mounting hole 2323 is arranged as a stepped hole, and the diameter of the second mounting hole 2323 at one end of the second supporting portion 2322 is larger than that at one end of the second tightening portion 2321, and a reset member 235 is arranged in the hole of the second mounting hole 2323 at one end of the second supporting portion 2322; a second tightening cone surface 2324 is arranged at one end of the second mounting hole 2323 near the second tightening portion 2321, and the second The cross-sectional diameter of the tightening cone surface 2324 gradually increases from the end close to the second support portion 2322 to the end away from the second support portion 2322; the second support portion 2322 is coaxially arranged in the first mounting hole 2313, and the second support portion 2322 is provided with a first tightening fitting surface 2325 with the same taper as the first tightening cone surface 2314, and the first tightening cone surface 2314 abuts against the first tightening fitting surface 2325; the end cover 233 is fixedly connected to the bottom wall of the second support portion 2322; the second tightening portion 2321 extends into the center hole 11, and the circumferential side wall of the second tightening portion 2321 abuts against the upper abutting portion 12; a plurality of second tightening grooves 2326 are provided on the second tightening portion 2321, and the plurality of second tightening grooves 2326 are evenly distributed along the circumferential side wall of the second tightening portion 2321, and the plurality of second tightening grooves 2326 are parallel to the center hole 11 along the length direction.

[0048] Reference Figure 7 The pull rod 234 includes a stretching section 2341, a connecting section 2342 and a tightening section 2343. The stretching section 2341, the connecting section 2342 and the tightening section 2343 are integrally coaxially arranged, one end of the connecting section 2342 is connected to the stretching section 2341, and the other end is connected to the tightening section 2343; the stretching section 2341 passes through the reset member 235, and one end of the stretching section 2341 extending out of the end cover 233 is threadedly connected to the limiting nut 2344; the tightening section 2343 extends out from the top of the second mounting hole 2323, and the circumferential side wall of the tightening section 2343 is provided with a second tightening fitting surface 2345 with the same taper as the second tightening cone surface 2324, and the second tightening cone surface 2324 is in abutment with the second tightening fitting surface 2345.

[0049] Reference Figure 4The reset member 235 includes a washer 2351 and a disc spring 2352. The washer 2351 and the disc spring 2352 are coaxially arranged in the second mounting hole 2323 located at one end of the second support portion 2322, and the washer 2351 and the disc spring 2352 are coaxially sleeved on the side wall of the stretching section 2341. The bottom of the disc spring 2352 abuts against the top wall of the end cover 233, the top of the disc spring 2352 abuts against the washer 2351, and the top wall of the washer 2351 abuts against the end surface of the connecting section 2342 close to one end of the stretching section 2341.

[0050] Reference Figure 4 The side wall of the first support portion 2312 is threadedly connected with a first limiting bolt 2317, and the side wall of the second support portion 2322 is provided with a first limiting groove 2327. One end of the first limiting bolt 2317 passes through the first support portion 2312 and is located in the first limiting groove 2327. The first limiting bolt 2317 can slide in the first limiting groove 2327. When the pull rod 234 pushes the second expansion sleeve 232 to move upward, the first limiting bolt 2317 limits the rising stroke of the first limiting groove 2327, thereby preventing the first expansion sleeve 231 from separating from the second expansion sleeve 232. , affecting the quality of dynamic balancing check; the side wall of the second support portion 2322 is threadedly connected with a second limiting bolt 2328, and the circumferential side wall of the connecting section 2342 is provided with a second limiting groove 2346, and the second limiting bolt 2328 passes through one end of the second support portion 2322 and is located in the second limiting groove 2346. The second limiting bolt 2328 can slide in the second limiting groove 2346, and when the pull rod 234 moves upward, the second limiting bolt 2328 limits the rising stroke of the second limiting groove 2346 to prevent the pull rod 234 from disengaging from the second expansion sleeve 232.

[0051] The implementation principle of the double-support internal expansion clamp of this embodiment is: after the torque converter 1 is assembled, it is necessary to perform a dynamic balance check on the torque converter 1 in order to improve the service life and use efficiency of the torque converter 1.

[0052] Before dynamic balancing, first fix the bottom cover 21 on the dynamic balancing machine, align the stretching section 2341 of the pull rod 234 with the second tightening portion 2321 of the second expansion sleeve 232, and pass the stretching section 2341 through the second mounting hole 2323 until the second tightening mating surface 2345 abuts against the second tightening conical surface 2324, and then thread the second limiting bolt 2328 with the second supporting portion 2322, the second limiting bolt 2328 passes through the side wall of the second supporting portion 2322, and the end of the second limiting bolt 2328 extends into the second limiting groove 234 6 to prevent the second expansion sleeve 232 from being separated from the pull rod 234; then, the washer 2351 and the disc spring 2352 are sequentially mounted on the circumferential side wall of the stretching section 2341, so that the washer 2351 and the disc spring 2352 are located in the second mounting hole 2323, and the top wall of the washer 2351 abuts against one end of the connecting portion close to the stretching section 2341, and then the end cover 233 is fixedly connected to the bottom end of the second support portion 2322, the stretching section 2341 passes through the end cover 233, the disc spring 2352 abuts against the top wall of the end cover 233, and the limiting nut 2344 is fixedly engaged with the second support portion 2322. The second support portion 2322 is aligned with the first tightening portion 2311, and the second support portion 2322 is inserted into the first mounting hole 2313 until the first tightening cone surface 2314 abuts against the first tightening mating surface 2325. Then, the first limiting bolt 2317 is threadedly connected to the first support portion 2312, and the first limiting bolt 2317 passes through the side wall of the first support portion 2312, and the end of the first limiting bolt 2317 extends into the first limiting groove 2327. to prevent the first expansion sleeve 231 from being separated from the second expansion sleeve 232; finally, the first expansion sleeve 231 is fixedly connected to the dynamic balancing machine, the receiving plate 22 is placed on the limiting step 2315, and the receiving plate 22 is fixedly connected to the limiting step 2315, and the torque converter 1 is adjusted so that the tightening section 2343, the second tightening portion 2321 and the first tightening portion 2311 are sequentially extended into the center hole 11, and the second tightening portion 2321 is abutted against the upper abutting portion 12, the first tightening portion 2311 is abutted against the lower abutting portion 13, and the bottom wall of the torque converter 1 is abutted against the top wall of the receiving plate 22.

[0053] When performing dynamic balancing, firstly, force is applied to the stretching section 2341, so that the pull rod 234 moves downward, the disc spring 2352 is compressed, and the second expansion sleeve 232 and the pull rod 234 move downward as a whole. At this time, the first expansion cone surface 2314 is tightly abutted against the first expansion fitting surface 2325, and the first expansion groove 2316 expands under the pressure of the first expansion fitting surface 2325, so that the first expansion part 2311 expands outward and presses against the lower abutting part 13, and at the same time, the second expansion cone surface 2324 is tightly abutted against the second expansion fitting surface 2345, and the second expansion groove 23 26 expands under the pressure of the second expansion fitting surface 2345, so that the second expansion part 2321 expands outward and presses against the upper abutment part 12, and the upper and lower ends of the torque converter 1 are pressed and fixed. Finally, the dynamic balancing machine is started, and the dynamic balancing machine drives the bottom cover 21 to rotate, and the bottom cover 21 drives the expansion piece 23 to rotate. The torque converter 1 rotates synchronously with the expansion piece 23, and the torque converter 1 is dynamically balanced. While the dynamic balancing is being performed, the downward pulling force on the pull rod 234 is maintained unchanged to avoid the first expansion sleeve 231 and the second expansion sleeve 232 from resetting, which affects the effect of the dynamic balancing.

[0054] After the dynamic balancing check is completed, the dynamic balancing machine is turned off, and force is applied upward to the pull rod 234, so that the pull rod 234 moves upward. The disc spring 2352 pushes the washer 2351 upward under the action of the restoring force, and the washer 2351 drives the connecting section 2342 to move upward, thereby causing the pull rod 234 to move upward until the second expansion cone surface 2324 is separated from the second expansion matching surface 2345, and the second expansion groove 2326 is reset, so that the second expansion portion 2321 returns to its original shape, thereby realizing that the second expansion portion 2321 is released from the tight fixation to the upper support portion. After the pull rod 234 moves upward to a certain extent, the limit nut 2344 abuts against the bottom wall of the end cover 233, so that the limit nut 2344 pushes the end cover 233 to move upward, and the end cover 233 pushes the second expansion sleeve 232 to move upward until the first tightening cone surface 2314 is separated from the first tightening matching surface 2325, and the first tightening groove 2316 is reset, so that the first tightening part 2311 restores its original shape, and the first tightening part 2311 is released from the tightening fixation to the lower support part. At this time, the torque converter 1 is removed from the inner support assembly 2 to complete the dynamic balancing check.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A double-support internal expansion clamp, characterized in that: The invention comprises a torque converter (1) and an inner support assembly (2) for fixing the torque converter (1); the inner support assembly (2) comprises a bottom cover (21), a receiving plate (22) and a tightening piece (23); the bottom cover (21) is fixedly connected to a dynamic balancing machine; the tightening piece (23) is coaxially arranged on the top wall of the bottom cover (21), and the tightening piece (23) is fixedly connected to the bottom cover (21); the receiving plate (22) is coaxially sleeved on the circumferential side wall of the tightening piece (23), and the receiving plate (22) is fixedly connected to the tightening piece (23); the torque converter (1) is coaxially arranged on the circumferential side wall of the tightening piece (23), and the bottom wall of the torque converter (1) abuts against the top wall of the receiving plate (22); A center hole (11) is provided at the center of the end face of the torque converter (1), and the center hole (11) passes through the upper and lower ends of the torque converter (1). An upper abutment portion (12) and a lower abutment portion (13) are provided in the torque converter (1) along the circumference of the inner wall of the center hole (11), and the expansion member (23) extends into the center hole (11) and abuts against the upper abutment portion (12) and the lower abutment portion (13) respectively.

2. A double-support internal expansion clamp according to claim 1, characterized in that: The expansion member (23) comprises a first expansion sleeve (231), a second expansion sleeve (232), an end cover (233), a pull rod (234) and a reset member (235); the first expansion sleeve (231) comprises a first expansion portion (2311) and a first support portion (2312), and the first expansion portion (2311) and the first support portion (2312) are integrally coaxially arranged; The first expansion sleeve (231) is provided with a first mounting hole (2313), the first mounting hole (2313) passes through the first expansion portion (2311) and the first support portion (2312), the second expansion sleeve (232) is arranged in the first mounting hole (2313), and the second expansion sleeve (232) can slide along the length direction of the first mounting hole (2313), and the first mounting hole (2313) is provided with a first expansion cone surface (2314) at one end close to the first expansion portion (2311); The bottom wall of the first support portion (2312) is coaxially fixedly connected to the top wall of the bottom cover (21), and a limiting step (2315) is provided on the circumferential side wall of one end of the first support portion (2312) close to the first tightening portion (2311), and the receiving plate (22) is fixedly mounted on the limiting step (2315); The first expansion portion (2311) extends into the central hole (11), and the circumferential side wall of the first expansion portion (2311) abuts against the lower abutment portion (13); a plurality of first expansion grooves (2316) are provided on the first expansion portion (2311).

3. A double-support internal expansion clamp according to claim 2, characterized in that: The second expansion sleeve (232) comprises a second expansion portion (2321) and a second support portion (2322), and the second expansion portion (2321) and the second support portion (2322) are integrally and coaxially arranged; A second mounting hole (2323) is provided on the second expansion sleeve (232), and the second mounting hole (2323) passes through the second tightening portion (2321) and the second supporting portion (2322). The pull rod (234) is arranged in the second mounting hole (2323), and the pull rod (234) can slide along the length direction of the second mounting hole (2323). A reset member (235) is arranged in the second mounting hole (2323) located at one end of the second supporting portion (2322), and a second tightening cone surface (2324) is arranged at one end of the second mounting hole (2323) close to the second tightening portion (2321); The second support portion (2322) is coaxially arranged in the first mounting hole (2313), and the second support portion (2322) is provided with a first expansion fitting surface (2325) having the same taper as the first expansion conical surface (2314), and the first expansion conical surface (2314) abuts against the first expansion fitting surface (2325); the end cover (233) is fixedly connected to the bottom wall of the second support portion (2322); The second expansion portion (2321) extends into the central hole (11), and the circumferential side wall of the second expansion portion (2321) abuts against the upper abutment portion (12); a plurality of second expansion grooves (2326) are provided on the second expansion portion (2321).

4. A double-support internal expansion clamp according to claim 3, characterized in that: The pull rod (234) comprises a stretching section (2341), a connecting section (2342) and a pressing section (2343); the stretching section (2341), the connecting section (2342) and the pressing section (2343) are coaxially arranged in one body; one end of the connecting section (2342) is connected to the stretching section (2341), and the other end is connected to the pressing section (2343); The stretching section (2341) passes through the reset member (235), and one end of the stretching section (2341) extending out of the end cover (233) is threadedly connected to a limiting nut (2344); The tightening section (2343) extends out of the top of the second mounting hole (2323), and the circumferential side wall of the tightening section (2343) is provided with a second expansion fitting surface (2345) having the same taper as the second expansion conical surface (2324), and the second expansion conical surface (2324) is in abutment with the second expansion fitting surface (2345).

5. A double-support internal expansion clamp according to claim 4, characterized in that: The reset member (235) includes a washer (2351) and a disc spring (2352), wherein the washer (2351) and the disc spring (2352) are coaxially arranged in the second mounting hole (2323) located at one end of the second support portion (2322), and the washer (2351) and the disc spring (2352) are coaxially sleeved on the side wall of the stretching section (2341), the bottom of the disc spring (2352) abuts against the top wall of the end cover (233), the top of the disc spring (2352) abuts against the washer (2351), and the top wall of the washer (2351) abuts against the end surface of the connecting section (2342) close to one end of the stretching section (2341).

6. A double-support internal expansion clamp according to claim 3, characterized in that: The side wall of the first support portion (2312) is threadedly connected with a first limiting bolt (2317), and the side wall of the second support portion (2322) is provided with a first limiting groove (2327). One end of the first limiting bolt (2317) passes through the first support portion (2312) and is located in the first limiting groove (2327). The first limiting bolt (2317) can slide in the first limiting groove (2327).

7. A double-support internal expansion clamp according to claim 5, characterized in that: The side wall of the second support portion (2322) is threadedly connected with a second limiting bolt (2328), and the circumferential side wall of the connecting section (2342) is provided with a second limiting groove (2346). One end of the second limiting bolt (2328) passes through the second support portion (2322) and is located in the second limiting groove (2346). The second limiting bolt (2328) can slide in the second limiting groove (2346).

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