Pneumatic torque wrench for automatic production line
By combining magnetic couplings and planetary reducers, the problems of inaccurate torque output and high cost of pneumatic wrenches on automated production lines are solved. This achieves precise output and stability of pneumatic torque wrenches, adapts to multi-position usage needs, and reduces maintenance costs.
Patent Information
- Application Number
- CN202520685118.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-12
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-12
AI Technical Summary
Existing pneumatic wrenches require a fixed torque output on automated production lines, but they are expensive and have a complex structure, making it difficult to meet the multi-position usage requirements of automated production lines.
It adopts a combination of magnetic coupling and planetary reducer, and is customized by the rated torque of magnetic coupling and the reduction ratio of planetary reducer. Combined with the housing design of plastic and metal materials, it can achieve precise output torque and stability of wrench shaft.
It achieves precise output torque for pneumatic torque wrenches, reduces costs, improves work efficiency, simplifies maintenance and parts replacement, and adapts to the multi-position usage needs of automated production lines.
Smart Images
Figure CN223947803U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mechanical equipment technology, and in particular to a pneumatic torque wrench for automatic production lines. Background Technology
[0002] The power source of a pneumatic wrench is compressed air. It can use compressed air to drive the clamping part to move, thereby carrying out the work. The advantage of pneumatic wrenches is that, since they use compressed air as the power source and power transmission medium, their energy loss is small, and they can provide high torque output with low consumption. Pneumatic wrenches are widely used in many industries.
[0003] Most existing pneumatic wrenches measure the torque applied to the threaded fasteners directly to ensure that the fasteners are tightened to the required standard. However, this method requires the pneumatic wrench to include a measuring and electrical control device, which increases the cost of the pneumatic wrench. In addition, most pneumatic wrenches have adjustable torque, but when used on automated production lines, the required output torque of the pneumatic wrench is mostly fixed. Therefore, there is a need for a pneumatic torque wrench for automated production lines. Utility Model Content
[0004] To address the problems mentioned in the background section, this invention provides a pneumatic torque wrench for automated production lines.
[0005] The technical solution of this utility model to achieve the above objectives is a pneumatic torque wrench for an automatic production line, comprising a wrench housing, which is composed of an inner housing and an outer housing. The outer housing is made of plastic, and the inner housing is made of metal. It also includes:
[0006] The pneumatic motor is installed inside the inner housing at one end and is fixed with bolts and nuts. An air inlet pipe is installed at its air inlet and an exhaust pipe is installed at its exhaust outlet. The air inlet pipe and the exhaust pipe extend out of the outer housing.
[0007] The magnetic coupling is located on one side of the pneumatic motor. It consists of an outer rotor, an outer magnet, an inner rotor, an inner magnet, and an isolation sleeve. The outer rotor is installed on the rotating end of the pneumatic motor. The outer magnets are evenly installed on the inner surface of the outer rotor. The inner rotor is movably inserted into the outer rotor. The inner magnets are evenly installed on the outer surface of the inner rotor and correspond to the positions of the outer magnets. The isolation sleeve is movably installed inside the outer rotor and fitted onto the inner rotor.
[0008] The planetary reducer is located on one side of the magnetic coupling. Its input shaft is inserted into the inner rotor and connected to the inner rotor. A connecting flange is provided on its input shaft, and the connecting flange is connected to the inner rotor by bolts.
[0009] Spanner shaft, located on one side of planetary reducer, one end of which is provided with a shaft sleeve, the shaft sleeve is sleeved on the output shaft of the planetary reducer, the other end of which extends out of the spanner shell and is installed with a bolt sleeve;
[0010] Positioning sleeve, installed at the other end inside the inner shell, and sleeved on the spanner shaft, and connected with the spanner shaft through a bearing;
[0011] Connecting pipe, provided at the rear end of the spanner shell and connected with the inner shell, a limiting ring is provided on the outer surface of the connecting pipe, an inner threaded connecting seat is movably sleeved on the limiting ring, and a square connecting block is provided at one end of the inner threaded connecting seat;
[0012] Fixed sleeve, movably sleeved on the connecting pipe and screwed with the inner threaded connecting seat, a square positioning groove is provided at the center of the inner end of the fixed sleeve, and the square connecting block is movably inserted into the square positioning groove.
[0013] As an automatic production line pneumatic torque wrench, the rated torque of the magnetic coupling is lower than the maximum output torque of the pneumatic motor.
[0014] As an automatic production line pneumatic torque wrench, the rated torque of the magnetic coupling and the reduction ratio of the planetary reducer are customized according to the actual use requirements of the automatic production line.
[0015] As an automatic production line pneumatic torque wrench, the magnetic force between the outer magnet and the inner magnet is attractive force.
[0016] As an automatic production line pneumatic torque wrench, the air inlet pipe and the air outlet pipe are respectively connected with the external air source through the pressure-resistant hose, and the communication thereof is controlled through the electromagnetic valve.
[0017] As an automatic production line pneumatic torque wrench, the fixed sleeve is connected with the mounting seat on the automatic production line.
[0018] Compared with the prior art, the utility model has the advantages that:
[0019] 1. The setting of the magnetic coupling can accurately ensure the output torque of the pneumatic motor, and through the proportional reduction of the planetary reducer, the accuracy of the output torque of the pneumatic torque wrench is effectively ensured, and the working efficiency is improved.
[0020] 2. The setting of the positioning sleeve and the connecting pipe can facilitate the installation and fixation of the pneumatic torque wrench, and through the cooperation of the square connecting block and the square positioning groove, the rotation of the connecting pipe is avoided, the stability of the fixation of the pneumatic torque wrench is ensured, and the use of the pneumatic torque wrench on the automatic production line is facilitated.
[0021] 3、The torque of the magnetic coupling and the speed reduction ratio of the planetary reducer in the utility model can be customized according to the use requirement of the actual automatic production line, so that the pneumatic torque wrenches at different positions of the automatic production line can meet the use requirement, so as to ensure the production efficiency of the automatic production line. BRIEF DESCRIPTION OF DRAWINGS
[0022] Fig. 1 is a structural schematic view of the pneumatic torque wrench for an automatic production line according to the utility model;
[0023] Fig. 2 is a sectional view of the magnetic coupling according to the utility model;
[0024] Fig. 3 is a connecting sectional view of the connecting spout and the fixed sleeve according to the utility model;
[0025] In the drawings:
[0026] 1, wrench housing; 11, inner housing; 12, outer housing; 2, pneumatic motor; 21, air inlet pipe; 22, exhaust pipe; 3, magnetic coupling; 31, outer rotor; 32, outer magnet; 33, inner rotor; 34, inner magnet; 35, isolation sleeve; 4, planetary reducer; 41, connecting flange; 5, wrench shaft; 51, coupling sleeve; 52, bolt sleeve; 6, positioning sleeve; 7, connecting spout; 71, limiting ring; 72, internal thread connecting seat; 73, square connecting block; 8, fixed sleeve; 81, square positioning groove. DETAILED DESCRIPTION
[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0028] The utility model provides a kind of technical scheme, as Figs. 1-3 As shown in the figure;A kind of pneumatic torque wrench for automatic production line, including wrench housing 1, it is constituted by inner housing 11 and outer housing 12, outer housing 12 is plastic material, inner housing 11 is metal material, further include: pneumatic motor 2, is installed in inner housing 11 inside one end, and is fixed by bolt and nut, its air inlet installs air inlet pipe 21, its exhaust port installs exhaust pipe 22, air inlet pipe 21 and exhaust pipe 22 extend outside outer housing, air inlet pipe 21 and exhaust pipe 22 are connected with external gas source respectively by pressure hose, and its communication is controlled by electromagnetic valve.
[0029] The utility model discloses an embodiment of the utility model, utilize the inner casing 11 of metal material and the shell of plastic material 12, one aspect can improve the strength of spanner casing 1, guarantee the service life of pneumatic torque spanner, on the other hand can improve its aesthetic property, reduce the influence of impact, wear and tear and environmental factor.
[0030] In the embodiment of the utility model, the air inlet pipe 21 and the air outlet pipe 22 of the pneumatic motor 2 are connected with the external air source through the pressure-resistant hose and are controlled through the electromagnetic air valve, so that the start and stop of the pneumatic motor 2 can be conveniently controlled, and the pneumatic motor 2 is more convenient to use on the automatic production line.
[0031] The magnetic coupling 3 is arranged on one side of the pneumatic motor 2 and is composed of an outer rotor 31, an outer magnet 32, an inner rotor 33, an inner magnet 34 and an isolation sleeve 35.
[0032] In the embodiment of the utility model, the rated torque of the magnetic coupling 3 is used, and the rated torque is amplified through the planetary reducer 4, so that the rated output torque of the spanner shaft 5 matches the fastening torque of the actual bolt fastener, the accurate assembly of the bolt fastener is ensured, and the working efficiency of the pneumatic torque spanner is improved.
[0033] In the embodiment of the utility model, the isolation sleeve 35 is sleeved on the inner rotor 33 and wraps the inner magnet 34, and when the isolation sleeve 35 is inserted into the outer rotor 31 along with the inner rotor 33, a certain gap is kept between the isolation sleeve 35 and the outer rotor 31, so that the wear and friction are effectively reduced, and the service life of the pneumatic torque spanner is prolonged.
[0034] In the embodiment of the utility model, the rated torque of the magnetic coupling 3 is used to accurately control the output torque of the pneumatic torque spanner, the cost of the pneumatic torque spanner is effectively reduced, the structure of the pneumatic torque spanner is simplified, the maintenance and replacement of parts of the pneumatic torque spanner are facilitated, and the pneumatic torque spanner is more convenient to use.
[0035] Spanner shaft 5, located on one side of planetary reducer 4, one end of which is provided with a shaft sleeve 51, which is sleeved on the output shaft of planetary reducer 4, and the other end of which extends out of the spanner shell 1 and is provided with a bolt sleeve 52; The positioning sleeve 6 is installed at the other end inside the inner shell 11 and is sleeved on the spanner shaft 5 and connected with the spanner shaft 5 through the bearing.
[0036] In the utility model embodiment, the positioning of the spanner shaft 5 by the positioning sleeve 6 can make the positioning of the spanner shaft 5 more accurate, and the quick connection of the bolt sleeve 52 and the bolt can make the bolt fastener be quickly fastened.
[0037] In the utility model embodiment, the bolt sleeve 52 can be provided with an adsorbing magnet inside, so that the bolt can be adsorbed into the bolt sleeve 52, to facilitate the quick docking with the bolt fastener.
[0038] The connecting pipe 7 is provided at the rear end of the spanner shell 1 and connected with the inner shell 11, a limiting ring 71 is provided on the outer surface of the connecting pipe 7, an inner threaded connecting seat 72 is movably sleeved on the limiting ring 71, the inner threaded connecting seat 72 is sleeved on the limiting ring 71, and a square connecting block 73 is provided at one end of the inner threaded connecting seat 72.
[0039] In the utility model embodiment, the connecting pipe 7 is inserted into the fixed sleeve 8, and the connecting pipe 7 and the fixed sleeve 8 are quickly fixed through the threaded connection of the inner threaded connecting seat 72 and the fixed sleeve 8 and the limiting of the limiting ring 71 to the inner threaded connecting seat 72, and the square connecting block 73 is inserted into the square positioning groove 81, so that the fixed firmness of the connecting pipe 7 and the fixed sleeve 8 can be ensured, and the self-rotation of the pneumatic torque wrench during use due to insecure fixing can be avoided.
[0040] As a pneumatic torque wrench for an automatic production line, the rated torque of the magnetic coupling 3 is lower than the maximum output torque of the pneumatic motor 2; the stability of the output torque of the pneumatic torque wrench is ensured.
[0041] As a pneumatic torque wrench for an automatic production line, the rated torque of the magnetic coupling 3 and the reduction ratio of the planetary reducer 4 are customized according to the actual use requirements of the automatic production line; the pneumatic torque wrench can meet the use requirements of different positions on the automatic production line, and the accurate assembly of the bolt fastener is ensured.
[0042] The magnetic force between the outer magnet 32 and the inner magnet 34 is attractive force; and the magnetic coupling 3 can drive the input shaft of the planetary reducer 4 to rotate by the magnetic force between the outer magnet 32 and the inner magnet 34.
[0043] The fixed sleeve 8 is connected with the mounting seat on the automatic production line, so that the pneumatic torque wrench can be conveniently installed on the corresponding position on the automatic production line.
[0044] In use, the customized pneumatic torque wrench is taken out, and the fixed sleeve 8 is detached, then the fixed sleeve 8 is installed on the mounting seat on the automatic production line by welding or other fastening modes, then the connecting pipe 7 is inserted into the fixed sleeve 8, the pneumatic torque wrench is rotated to align the square connecting block 73 with the square positioning groove 81, then the pneumatic torque wrench is pushed to insert the square connecting block 73 into the square positioning groove 81, finally, the inner threaded connecting seat 72 is rotated to be connected with the fixed sleeve 8 through threads, so that the fixed sleeve 8 is fastened to the connecting pipe 7, thereby completing the fixation of the pneumatic torque wrench.
[0045] Then, the air inlet pipe 21 and the air outlet pipe 22 are connected with the corresponding pressure-resistant hoses, and the electromagnetic air valve on the external controller is controlled to control the operation of the pneumatic torque wrench.
[0046] When the pneumatic torque wrench needs to be used, the bolt sleeve 52 is sleeved on the bolt fastener and inserted into the fastening position, the electromagnetic air valve is controlled to be opened, high-pressure air is introduced into the pneumatic motor 2 through the air inlet pipe 21 and is discharged through the air outlet pipe 22, thereby the pneumatic motor 2 starts to work and drives the magnetic coupling 3 to rotate.
[0047] The magnetic coupling 3 drives the input shaft of the planetary reducer 4 to start to rotate by the magnetic force between the outer rotor 31 and the inner rotor 33, so that the output shaft is driven to rotate by the reduction of the planetary reducer, thereby the bolt sleeve 52 drives the bolt fastener to rotate, so that the bolt fastener starts to be assembled.
[0048] With the assembly of the bolt fastener, the fastening torque gradually increases, when the torque of the input shaft of the planetary reducer 4 is equal to the rated torque of the magnetic coupling 3, the fastening torque of the bolt fastener reaches the assembly requirement, when the torque of the input shaft of the planetary reducer 4 is greater than the rated torque of the magnetic coupling 3 with the continuous work of the pneumatic motor 2, the magnetic coupling 3 is in an overload state, thereby the wrench shaft 5 stops rotating, at this time, the electromagnetic air valve can be controlled to be closed, so that the pneumatic motor 2 stops working.
[0049] It has to be noted that, in the present document, the terms "first", "second", etc. merely serve to identify a subject or action, without necessarily requiring or implying any actual relationship or order between such subjects or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. In other words, without further restriction, the term "comprises" does not exclude the presence of additional elements in the process, method, article, or apparatus that includes the elements listed in the process, method, article, or apparatus.
[0050] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.
Claims
1. A pneumatic torque wrench for an automatic production line, comprising a wrench housing composed of an inner housing and an outer housing, the outer housing being made of plastic and the inner housing being made of metal, characterized in that, Also include: Pneumatic motor, installed in the inner shell inside one end, and fixed by bolt and nut, its intake port installed intake pipe, its exhaust port installed exhaust pipe, intake pipe and exhaust pipe out of the outer shell; Magnetic coupling, set in the pneumatic motor side, which is composed of outer rotor, outer magnet, inner rotor, inner magnet and isolation sleeve, outer rotor installed in the rotating end of the pneumatic motor, outer magnet is evenly installed on the inner side surface of the outer rotor, inner rotor is inserted in the outer rotor, inner magnet is evenly installed on the outer side surface of the inner rotor, and corresponding to the position of the outer magnet, isolation sleeve is set in the outer rotor, and is sleeved on the inner rotor; Planetary reducer, set in the magnetic coupling side, its input shaft is inserted into the inner rotor, and is connected with the inner rotor, its input shaft is provided with connecting flange, and the connecting flange is connected with the inner rotor through bolt; Spanner shaft, located in the planetary reducer side, one end of which is provided with coupling sleeve, which is sleeved on the output shaft of the planetary reducer, the other end of which is out of the spanner shell, and is provided with bolt sleeve; Positioning sleeve, installed in the inner shell inside the other end, and sleeved on the spanner shaft, and connected with the spanner shaft through bearing; Connecting pipe, set in the rear end of the spanner shell, and connected with the inner shell, its outer surface is provided with limiting ring, and inner threaded connecting seat is sleeved on it, one end of which is provided with square connecting block; Fixed sleeve, sleeved on the connecting pipe, and connected with the inner threaded connecting seat, its inner end is provided with square positioning groove, and the square connecting block is inserted in the square positioning groove.
2. The pneumatic torque wrench for an automatic production line according to claim 1, characterized by The rated torque of the magnetic coupling is lower than the maximum output torque of the pneumatic motor.
3. The pneumatic torque wrench for an automatic production line according to claim 1, characterized by The rated torque of the magnetic coupling and the reduction ratio of the planetary reducer are customized according to the actual use requirements of the automatic production line.
4. The pneumatic torque wrench for an automatic production line according to claim 1, characterized by The magnetic force between the outer magnet and the inner magnet is attractive force.
5. The pneumatic torque wrench for an automatic production line according to claim 1, wherein The intake pipe and the exhaust pipe are connected with the external gas source through pressure resistant hose respectively, and the communication is controlled through electromagnetic valve.
6. The pneumatic torque wrench for an automatic production line according to claim 1, wherein The fixed sleeve is connected with the mounting seat on the automatic production line.