Motor shaft thread tapping clamping mechanism and clamping method

Abstract

The invention discloses a motor shaft thread tapping clamping mechanism and a clamping method. The motor shaft thread tapping clamping mechanism comprises a rack; the first clamping module is vertically arranged on the rack, and the first clamping module is provided with a rotation limiting frame capable of limiting a motor shaft and a limiting ring capable of continuously and dynamically limiting the motor shaft; the second clamping module is vertically arranged on the rack and located under the rotating limiting frame; the second clamping module is provided with a fixed limiting frame which can be matched with the rotary limiting frame to clamp and fix the motor shaft; the coaxial detection module is vertically arranged on the rack and is close to the rear end of the first clamping module; and the correcting module is vertically arranged on the rack and is close to the front end of the first clamping module. According to the motor shaft self-positioning clamping device, self-adaptive clamping can be carried out on motor shafts of different sizes, and self-positioning can be carried out according to the axes of the different motor shafts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shaft workpiece machining, in particular to a motor shaft thread tapping clamping mechanism and clamping method. BACKGROUND

[0002] The motor shaft is a core component in the motor transmission system, and the end thread thereof is usually used for installing fan, shaft coupling, locking nut and other components. In the process of motor manufacturing or maintenance, the machining quality of the motor shaft end thread often needs to be repaired or machined through tapping process. However, in the existing motor shaft thread tapping operation, the motor shaft is usually fixed by manual vise or ordinary clamp, which has the following disadvantages: 1. The traditional clamping device mostly relies on manual tightening or mechanical clamping jaw for single-point or double-point clamping, and the stress is uneven and the clamping force is difficult to accurately control, which easily causes the motor shaft to rotate or loosen slightly during tapping, affecting the thread machining precision; 2. The existing clamps are mostly fixed structures, which cannot be quickly adjusted according to motor shafts of different diameters, lengths or shapes, and it takes a long time to replace or adjust the clamps, reducing the production efficiency; 3. In the case of insufficient clamping precision or unreasonable positioning method, the tapping tool and the axis of the motor shaft are difficult to keep strictly coaxial, which easily causes thread skewing, incomplete tooth shape and other defects, affecting the thread connection reliability; 4. The manual clamping and releasing process is laborious, and frequent adjustment of the clamp position and tapping posture easily causes the operator to be tired, increasing the risk of injury. SUMMARY

[0003] In view of the above problems, a motor shaft thread tapping clamping mechanism is provided, which has high clamping stability, wide adaptation range and can ensure the coaxiality of tapping, thereby solving the technical problems of uneven stress and difficult accurate control of clamping force of the existing clamping mechanism, inability to quickly adjust according to motor shafts of different diameters, lengths or shapes, and difficulty of the tapping tool and the axis of the motor shaft to keep strictly coaxial, which easily causes thread skewing.

[0004] To solve the problems in the prior art, the present application provides a motor shaft thread tapping clamping mechanism, which comprises: a rack; a first clamping module vertically arranged on the rack, the first clamping module being provided with a rotating limiting frame capable of limiting the motor shaft and a limiting ring capable of continuously dynamically limiting the motor shaft; a second clamping module vertically arranged on the rack and located directly below the rotating limiting frame; the second clamping module being provided with a fixed limiting frame capable of clamping and fixing the motor shaft in cooperation with the rotating limiting frame; a coaxiality detection module vertically arranged on the rack and located close to the rear end of the first clamping module; and a correction module vertically arranged on the rack and located close to the front end of the first clamping module.

[0005] Preferably, the first clamping module further comprises a first support frame and a rotary driver capable of driving the rotary limiting frame to rotate; the limiting ring is fixedly arranged on the first support frame; the rotary limiting frame is rotatably arranged on the right side of the first support frame and close to the limiting ring; and the rotary driver is fixedly arranged on the left side of the first support frame and in transmission connection with the rotary limiting ring.

[0006] Preferably, the rotary limiting frame is composed of a first limiting disc, a connecting shaft and a second limiting disc which are coaxially and fixedly connected in sequence; and a first clamping groove is further arranged through the first limiting disc and the second limiting disc, and a plurality of the first clamping grooves are circumferentially arranged along the axis of the connecting shaft.

[0007] Preferably, the first clamping module further comprises a connecting frame and a guide ring capable of real-time limiting the motor shaft on the rotary limiting frame; and the guide ring is coaxially and fixedly arranged on the right side of the rotary limiting frame through the connecting frame.

[0008] Preferably, the first clamping module further comprises a first linear driver capable of driving the first support frame to longitudinally move; the first linear driver is fixedly arranged in a vertical state at the bottom of the rack and the output shaft is fixedly connected with the first support frame through the rack.

[0009] Preferably, the second clamping module further comprises a second linear driver capable of driving the fixed limiting frame to longitudinally approach or move away from the rotary limiting frame; the second linear driver is fixedly arranged in a vertical state at the bottom of the rack and the output shaft is arranged towards the rotary limiting frame through the rack; and the fixed limiting frame is vertically fixedly arranged at the driving end of the second linear driver.

[0010] Preferably, the coaxial detection module is provided with two groups of detection units capable of approaching each other; and each group of detection units is provided with a detection frame capable of abutting against both sides of the motor shaft and a distance measuring sensor capable of detecting the displacement stroke of the detection frame, respectively.

[0011] Preferably, the detection unit comprises a first mounting frame, a second guide rod, a spring and a flange; two second guide rods are arranged vertically on the back side of the detection frame and the rod part of the second guide rod is arranged through the first mounting frame and in sliding fit with the first mounting frame; a spring is coaxially and sleevedly arranged outside each second guide rod, and the two ends of the spring are in abutment with the first mounting frame and the detection frame, respectively; the flange is coaxially and fixedly arranged at the end of the second guide rod; and the distance measuring sensor is vertically arranged on the first mounting frame and the detection end is arranged towards the detection frame.

[0012] Preferably, the correction module is provided with a correction plate and an electric push rod capable of driving the correction plate to correct the front end of the motor shaft.

[0013] A clamping method of a motor shaft thread tapping clamping mechanism, applied to a motor shaft thread tapping clamping mechanism, comprising the following steps: S1: the staff places the motor shaft to be processed horizontally at the feeding position of the rotating limiting frame through the first clamping groove, and makes the tail of the motor shaft abut against the limiting ring, so that the motor shaft can be placed in a unified posture; an external power source is connected to drive the rotary driver to act, the rotary driver output shaft rotates to drive the rotating limiting frame to rotate, so that the motor shaft is transferred from the feeding position to the processing position in turn; S2: after the motor shaft is transferred to the processing position, the second linear driver is driven to act, the output shaft is extended or retracted to drive the fixed limiting frame to move longitudinally, and the rotating limiting frame is used to limit and clamp the motor shaft, and the fixed limiting frame is synchronously driven to act, so that the motor shaft is preliminarily fixed; S3: when the motor shaft is in the processing position, the coaxial detection module starts to work, the distance measuring sensor arranged in the detection unit is used to detect the axial deviation of the motor shaft in real time, and detection data is output, so that the coaxiality information of the motor shaft relative to the tapping equipment main shaft is obtained; S4: according to the detection result of the coaxial detection module, the first clamping module and the second clamping module are driven to act respectively, the clamping position of the rotating limiting frame and the fixed limiting frame is adjusted through the extension or retraction of the linear driver output shaft, so that the spatial position of the motor shaft is dynamically corrected, and the coaxiality of the motor shaft and the tapping equipment is ensured; S5: during the clamping correction process, the electric push rod is driven to drive the correction plate to horizontally approach the front end of the motor shaft, and the inclined surface of the correction plate is used to flexibly guide the end of the motor shaft, so that the front end of the motor shaft is accurately abutted against the limiting ring; S6: after the coaxiality and the end correction are completed, the fixed limiting frame and the movable limiting frame are synchronously moved towards each other, the motor shaft is stably clamped at the processing position, and the final clamping preparation before tapping is completed.

[0014] The beneficial effects of the present application compared with the prior art are: 1: the coaxial detection module is used to detect the axial deviation of the motor shaft at the processing position, and the dynamic adjustment function of the first clamping module and the second clamping module is combined, so that the coaxiality correction of the motor shaft and the tapping equipment before tapping is realized, and the machining precision is ensured; 2: the correction plate driven by the electric push rod is used to flexibly guide the front end of the motor shaft, so that the end of the motor shaft can be accurately abutted against the limiting ring, machining defects caused by end deviation are avoided, and the tapping quality is improved; 3. The multiple clamping grooves of the rotating limiting frame can realize the sequential limiting and clamping of multiple motor shafts, the dynamic limiting function of the guide ring can realize the continuous feeding and transmission of the motor shafts, and the machining requirements of different specifications of the motor shafts can be met, so that the applicability of the device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a perspective view of a motor shaft thread tapping and clamping mechanism.

[0016] Figure 2 It is a side view of a motor shaft thread tapping and clamping mechanism. Figure 1 .

[0017] Figure 3 It is a front view of a motor shaft thread tapping and clamping mechanism.

[0018] Figure 4 It is a cross-sectional view of A-A of Figure 3 .

[0019] Figure 5 It is a local enlarged view of B of Figure 4 .

[0020] Figure 6 It is an exploded perspective view of a motor shaft thread tapping and clamping mechanism.

[0021] Figure 7 It is a local enlarged view of C of Figure 6 .

[0022] Figure 8 It is a side view of a motor shaft thread tapping and clamping mechanism Figure 2 .

[0023] Figure 9 It is a perspective view of a coaxial detection module in a motor shaft thread tapping and clamping mechanism.

[0024] Figure 10 It is a perspective view of a correction module in a motor shaft thread tapping and clamping mechanism.

[0025] Reference numerals in the figure are: 1. frame; 2. first adaptive clamping module; 21. rotating limiting frame; 211. first limiting disc; 212. connecting shaft; 213. second limiting disc; 214. first clamping groove; 22. limiting ring; 23. first support frame; 24. rotary driver; 25. connecting frame; 26. guide ring; 27. first linear driver; 3. second adaptive clamping module; 31. fixed limiting frame; 32. second linear driver; 4, coaxial detection module; 41, detection unit; 411, first mounting bracket; 412, second guide rod; 413, spring; 414, flange; 42, detection bracket; 43, distance measuring sensor; 5, correction module; 51, correction plate; 52, electric push rod; 53, second support frame; 54, second mounting bracket. DETAILED DESCRIPTION

[0026] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, the present application will be described in further detail below in conjunction with the drawings and specific embodiments.

[0027] Reference Figures 1 to 10 As shown: a motor shaft tapping and clamping mechanism, comprising: a rack 1; a first clamping module 2 vertically arranged on the rack 1, the first clamping module 2 is provided with a rotating limiting frame 21 capable of limiting the motor shaft and a limiting ring 22 capable of continuously dynamically limiting the motor shaft; a second clamping module 3 vertically arranged on the rack 1 and located directly below the rotating limiting frame 21; the second clamping module 3 is provided with a fixed limiting frame 31 capable of cooperating with the rotating limiting frame 21 to clamp the motor shaft; a coaxial detection module 4 vertically arranged on the rack 1 and close to the rear end of the first clamping module 2; a correction module 5 vertically arranged on the rack 1 and close to the front end of the first clamping module 2.

[0028] When tapping the motor shaft, first place the motor shaft to be processed into the feeding position arranged on the rotating limiting frame 21, drive the rotating limiting frame 21 to rotate, make the motor shaft rotate from the feeding position to the processing position, and position it opposite to the fixed limiting frame 31. Then drive the second clamping module 3 to move the fixed limiting frame 31 along the longitudinal direction towards the rotating limiting frame 21, so as to limit and preliminarily clamp the motor shaft with the fixed limiting frame 31, and keep the motor shaft in the processing position. After the motor shaft is stably positioned by the limiting action of the fixed limiting frame 31 and the movable limiting frame, the correction module 5 is started synchronously to limit and correct the motor shaft in the circumferential direction, so that the tail of the motor shaft reliably abuts against the rotating limiting frame 21, to further ensure the stability and coaxiality of the motor shaft in the processing position.

[0029] After the limiting operation is completed, the fixed limiting frame 31 and the movable limiting frame continue to move towards each other, thereby accurately clamping and fixing the motor shaft. At this time, the motor shaft at the machining position will be detected and monitored in real time by the coaxial detection module 4 to confirm the coaxial accuracy thereof relative to the tapping equipment main shaft. When the coaxial detection module 4 detects that there is a coaxial offset, the first clamping module 2 and the second clamping module 3 will act in conjunction according to the detected offset data to dynamically fine-tune and correct the radial and axial positions of the motor shaft, so that the motor shaft always remains coaxial with the tapping equipment main shaft at the machining position, thereby ensuring the machining accuracy of the subsequent tapping operation.

[0030] The present application realizes the automatic transfer, limiting and stable clamping of the motor shaft from the feeding position to the machining position through the cooperation of the rotating limiting frame 21, the fixed limiting frame 31, the movable limiting frame and the clamping module, thereby avoiding the positioning errors caused by traditional manual adjustment. At the same time, with the real-time monitoring and feedback of the coaxial detection module 4 and the dynamic correction mechanism of the clamping module, the coaxial deviation of the motor shaft can be effectively eliminated, thereby ensuring that the high-precision coaxiality is always maintained during the tapping process. Therefore, not only the machining accuracy and product consistency of the motor shaft tapping are improved, but also the automatic processing efficiency is significantly improved, the operation complexity and the defective rate are reduced, and the present application is suitable for high-efficiency and high-precision thread tapping operation of motor shafts of various specifications.

[0031] Referring to Figure 6 As shown in the figure, the first clamping module 2 further comprises a first support frame 23 and a rotating driver 24 capable of driving the rotating limiting frame 21 to rotate; the limiting ring 22 is fixedly arranged on the first support frame 23; the rotating limiting frame 21 is rotatably arranged on the right side of the first support frame 23 and close to the limiting ring 22; and the rotating driver 24 is fixedly arranged on the left side of the first support frame 23 and in transmission connection with the rotating limiting ring 22.

[0032] When it is necessary to transfer the motor shaft from the feeding position to the machining position by rotating the rotating limiting frame 21, first, an external power source is connected and the rotating driver 24 is driven to act. After the output shaft of the rotating driver 24 rotates, it can synchronously drive the rotating limiting frame 21 to stably rotate, thereby driving the motor shaft placed thereon to be smoothly transported along a circumferential path from the feeding position to the machining position. In order to further improve the placement stability and attitude consistency of the motor shaft during the transfer process, the rotating limiting frame 21 is provided with a limiting ring 22. The limiting ring 22 is used to one-way limit and position the tail of the motor shaft when it is loaded, thereby effectively avoiding the shaking, deviation or irregular placement of the motor shaft during the transportation process, so that the motor shaft can be placed on the rotating limiting frame 21 in a unified and standard attitude, thereby laying a good foundation for the subsequent clamping, correction and tapping processing.

[0033] By adopting the linkage design of the rotating driver 24 and the rotating limiting frame 21, the automatic circumferential carrying of the motor shaft from the feeding position to the processing position is realized, and the manual operation strength and positioning error are significantly reduced; at the same time, with the one-way limiting function of the limiting ring 22, the motor shaft can be kept in a uniform placement posture during the feeding stage, thereby ensuring the stability and coaxial precision of the motor shaft in the subsequent processing link.

[0034] Referring to Figure 2 and Figure 3 , the rotating limiting frame 21 is composed of a first limiting disc 211, a connecting shaft 212 and a second limiting disc 213 which are fixedly connected in sequence and coaxially; a first clamping groove 214 is also formed through the first limiting disc 211 and the second limiting disc 213, and a plurality of the first clamping grooves 214 are circumferentially arranged along the axis of the connecting shaft 212.

[0035] The first clamping groove 214 is specifically V-shaped, which is adapted to different sizes of motor shafts.

[0036] When it is necessary to place the motor shaft into the rotating limiting frame 21 and conduct it, the worker only needs to horizontally place the motor shaft into the first clamping groove 214 formed on the top of the first limiting disc 211 and the second limiting disc 213, and the feeding operation can be completed. The first clamping groove 214 is circumferentially spaced along the axis direction of the connecting shaft 212, and each clamping groove can independently accommodate and limit one motor shaft, thereby realizing the sequential bearing and positioning of multiple motor shafts when the rotating limiting frame 21 rotates. Through this structure, not only the stable placement and positioning accuracy of a single motor shaft can be ensured, but also the continuous bearing of multiple stations can be realized under the cooperation of the number and distribution of clamping grooves, thereby effectively improving the feeding efficiency and processing continuity of the motor shaft.

[0037] By forming a plurality of first clamping grooves 214 circumferentially distributed on the rotating limiting frame 21, the motor shaft can be quickly placed in a standardized posture, ensuring the convenience of feeding and the reliability of limiting; at the same time, the sequential limiting and continuous conduction of multiple motor shafts can be realized, which significantly improves the continuity of the processing process and the equipment utilization rate, reduces the time loss caused by frequent feeding, and effectively improves the overall production efficiency.

[0038] Referring to Figure 6 , the first clamping module 2 further comprises a connecting frame 25 and a guide ring 26 capable of real-time limiting the motor shaft on the rotating limiting frame 21; the guide ring 26 is coaxially fixedly arranged on the right side of the rotating limiting frame 21 through the connecting frame 25.

[0039] The guide ring 26 is specifically an arc-shaped plate in a semicircular structure, the outer edge of which matches the outer periphery of the rotating limiting frame 21 and is fixedly installed with the limiting ring 22 through the connecting frame 25. The guide ring 26 forms a partial cladding type limiting cooperation with the outer wall of the motor shaft in the process of the rotating limiting frame 21 driving the motor shaft to transmit circumferentially, thereby dynamically limiting and guiding the motor shaft. Through this structure, the motor shaft can always maintain a stable placement posture during the rotating handling process, avoiding the conditions of jumping, displacement or falling due to rotational inertia or vibration, and ensuring that it is always stably positioned in the rotating limiting frame 21.

[0040] Referring to Figure 4 As shown in the figure: the first clamping module 2 further comprises a first linear actuator 27 capable of driving the first support frame 23 to move longitudinally; the first linear actuator 27 is fixedly arranged in a vertical state at the bottom of the rack 1 and the output shaft is fixedly connected with the first support frame 23 through the rack 1.

[0041] The bottom of the first support frame 23 is also vertically provided with a first guide rod capable of guiding the first support frame 23 to slide longitudally.

[0042] When the motor shaft is located at the machining position and the coaxial detection module 4 detects that there is an offset angle of the motor shaft relative to the axis of the tapping device, in order to ensure the coaxial precision of the subsequent tapping process, it is necessary to dynamically correct the clamping position of the first clamping module 2 in real time. The specific operation is as follows: first, connect an external power source to drive the first linear actuator 27 to start, and the output shaft of the first linear actuator 27 generates controllable extension and contraction motion under the action of control instructions; through the extension or contraction action of the output shaft, the rotating limiting frame 21 can be adjusted in a small amount along the vertical direction, thereby realizing accurate correction of the limiting height. Through this longitudinal adjustment mode, the axis of the motor shaft can be gradually corrected and kept in a highly coaxial state with the spindle axis of the tapping device, so as to meet the precision machining requirements of the tapping process.

[0043] Furthermore, a vertical first linear actuator 27 can also be added to the tapping device, and the tapping position of the tapping device can be adjusted by the vertical first linear actuator 27 according to the detection data of the coaxial detection module 4.

[0044] Referring to Figure 4 As shown in the figure: the second clamping module 3 further comprises a second linear actuator 32 capable of driving the fixed limiting frame 31 to move longitudinally close to or away from the rotating limiting frame 21; the second linear actuator is fixedly arranged in a vertical state at the bottom of the rack 1 and the output shaft is arranged towards the rotating limiting frame 21 through the rack 1; the fixed limiting frame 31 is vertically fixedly arranged at the driving end of the second linear actuator 32.

[0045] The fixed limiting frame 31 is specifically a rectangular block and a second clamping groove 311 in the shape of a V is formed on the top.

[0046] When the motor shaft is transported to the machining position via the rotating limiting frame 21, in order to ensure that the motor shaft can be reliably clamped at the machining position and keep coaxial with the tapping device, the second linear actuator 32 needs to be actuated. The specific operation is as follows: first, an external power source is connected to start the second linear actuator 32, and under the action of the control command, the output shaft generates controllable extension or contraction movement and transmits driving force to the fixed limiting frame 31, so that the displacement of the fixed limiting frame 31 in the vertical direction is adjusted. During the adjustment process, the fixed limiting frame 31 can dynamically correct and adjust the clamping position between the fixed limiting frame 31 and the rotating limiting frame 21 according to the real-time detection data of the coaxial detection module 4, so that the motor shaft is stably clamped in the machining position. Through the cooperation of the fixed limiting frame 31 and the rotating limiting frame 21, the motor shaft can be fixed in the machining position with precise posture, thereby providing stable and high-precision positioning guarantee for subsequent tapping processing.

[0047] Referring to Figure 7 As shown: the coaxial detection module 4 is provided with two groups of detection units 41 that can approach each other; and each group of detection units 41 is provided with a detection frame 42 that can abut against both sides of the motor shaft and a distance measuring sensor 43 that can detect the displacement stroke of the detection frame 42, respectively.

[0048] In the non-working state, the detection frames 42 in the two groups of detection units 41 are in the maximum stroke expanded position and abut against each other to form an initial reference point. When the motor shaft is gradually transported between the two detection frames 42 under the drive of the rotating limiting frame 21, the motor shaft outer wall will form a radial top pressure on the detection frame 42, so that the two detection frames 42 produce synchronous contraction in opposite directions. With the gradual contraction of the detection frame 42, the distance measuring sensor 43 mounted on the detection frame 42 can collect and record the contraction stroke data of the detection frame 42 in real time, and compare and analyze it with the initial reference position. Thus, the axial offset of the motor shaft relative to the machining position can be accurately calculated, and the function of real-time dynamic detection of the axial position of the motor shaft during entering the machining position is realized.

[0049] By setting two groups of detection units 41 and using the symmetrical top-shrink displacement generated when the motor shaft is intervened, the axial offset detection based on the stroke of the detection frame 42 is realized. Without additional marking or complex calibration of the motor shaft, high-precision offset measurement can be completed in the automatic handling process. Through real-time monitoring and data recording of the distance measuring sensor 43, the coaxiality control of the motor shaft when entering the machining position can be ensured, which provides a reliable detection basis for the subsequent tapping process.

[0050] Referring to Figure 7 andFigure 9 As shown: the detection unit 41 comprises a first mounting frame 411, a second guide rod 412, a spring 413 and a flange 414; the second guide rod 412 is provided with two, two guide rods are vertically arranged on the rear side of the detection frame 42, and the rod part of the second guide rod 412 passes through the first mounting frame 411 and is in sliding fit with the first mounting frame 411; each of the second guide rod 412 is coaxially sleeved with a spring 413, respectively, and the two ends of the spring 413 are respectively in abutment with the first mounting frame 411 and the detection frame 42; the flange 414 is coaxially fixedly arranged on the end of the second guide rod 412; the distance measuring sensor 43 is vertically arranged on the first mounting frame 411 and the detection end is arranged towards the detection frame 42.

[0051] When the motor shaft is gradually moved to the machining position under the drive of the rotation limiting frame 21, the outer wall will first abut against the contact end face of the detection frame 42, so as to exert a radial thrust on the detection frame 42. The detection frame 42 after being stressed is stably contracted to the inside of the first mounting frame 411 along the preset direction under the constraint and guidance of the second guide rod 412, so as to avoid the occurrence of deviation and jitter phenomenon. In the process of contraction of the detection frame 42, the distance measuring sensor 43 can collect and record the displacement of the detection frame 42 in real time, so as to obtain the shaft center position deviation data when the motor shaft enters the machining position.

[0052] When the motor shaft completes detection and gradually moves away from the detection frame 42, the detection frame 42 automatically rebounds under the elastic jacking action of the reset spring 413 and recovers to the initial maximum stroke position along the second guide rod 412. At the same time, the flange 414 arranged on the detection frame 42 can form effective limiting when the detection frame 42 rebounds to the maximum stroke, preventing the detection frame 42 from overextending or mispositioning due to inertial motion, so as to ensure that the detection frame 42 is in a stable initial reference state, so as to facilitate the repeated execution of the next detection process.

[0053] Referring to Figure 10 As shown: the correction module 5 is provided with a correction plate 51 and an electric push rod 52 capable of driving the correction plate 51 to correct the front end of the motor shaft.

[0054] The correction module 5 further comprises a second support frame 53 and a second mounting frame 54; the electric push rod 52 is fixedly arranged on the top of the second support frame 53 in a horizontal state through the second mounting frame 54; the correction plate 51 is fixedly arranged on the driving end of the electric push rod 52 in a horizontal state; the correction plate 51 is a V-shaped plate arranged at an acute angle.

[0055] When it is necessary to accurately correct the end of the motor shaft located in the machining position, first, an external power source is connected to drive the electric push rod 52 to start. In the working state of the electric push rod 52, the output shaft gradually extends and drives the correction plate 51 to smoothly approach the front end of the motor shaft in the horizontal direction. In this process, the correction plate 51 is arranged at a preset inclined angle, and the inclined surface at the front end of the correction plate 51 can flexibly guide the end of the motor shaft when it is contacted, so that the axis of the motor shaft is gradually corrected and guided to the standard reference direction. As the correction plate 51 continues to apply force, the end of the motor shaft is finally pushed to tightly abut against the limiting ring 22, thereby completing the correction operation of the end position of the motor shaft.

[0056] By arranging the correction plate 51 driven by the electric push rod 52 and using the inclined surface structure of the correction plate 51 to guide the end of the motor shaft, not only can the direct impact or deviation of the end of the motor shaft in the correction process be effectively avoided, but also the automatic alignment and accurate abutment of the motor shaft and the limiting ring 22 can be achieved. The coaxial stability of the motor shaft in the machining position and the accuracy of the end reference position are ensured, and the machining precision in the tapping process is improved.

[0057] A clamping method of a motor shaft tapping and clamping mechanism, applied to a motor shaft tapping and clamping mechanism, comprising the following steps: S1: The worker places the motor shaft to be machined horizontally at the feeding position of the rotating limiting frame 21 through the first clamping groove 214, and makes the tail of the motor shaft abut against the limiting ring 22, so as to ensure that the motor shaft can be placed in a unified posture; an external power source is connected to drive the rotary driver 24 to act, the output shaft of the rotary driver 24 rotates to drive the rotating limiting frame 21 to rotate, so that the motor shaft is transferred from the feeding position to the machining position in turn; S2: After the motor shaft is transferred to the machining position, the second linear driver 32 is driven to act, the output shaft is extended or retracted to drive the fixed limiting frame 31 to move longitudinally, and the motor shaft is clamped and fixed by cooperating with the rotating limiting frame 21, and the fixed limiting frame 31 is synchronously cooperated to act, so as to realize the preliminary fixation of the motor shaft; S3: When the motor shaft is in the machining position, the coaxial detection module 4 starts to work, the distance measuring sensor 43 arranged in the detection unit 41 detects the axial deviation of the motor shaft in real time, and outputs the detection data to obtain the coaxial information of the motor shaft relative to the tapping equipment main shaft; S4: According to the detection result of the coaxial detection module 4, the first clamping module 2 and the second clamping module 3 are driven to act respectively, the clamping position of the rotating limiting frame 21 and the fixed limiting frame 31 is adjusted by the extension or retraction of the output shaft of the linear driver, so as to dynamically correct the spatial position of the motor shaft and ensure that it is coaxial with the tapping equipment; S5: In the clamping correction process, the electric push rod 52 is driven to drive the correction plate 51 to horizontally approach the front end of the motor shaft, the inclined surface of the correction plate 51 is used to flexibly guide the end part of the motor shaft, and the front end of the motor shaft is precisely abutted with the limiting ring 22; S6: After completing the coaxiality and end correction, the fixed limiting frame 31 and the movable limiting frame are synchronously moved towards each other, the motor shaft is stably clamped in the machining position, and the final clamping preparation before tapping machining is completed.

[0058] The motor shaft can be self-adaptively clamped and self-positioned according to the shaft center of different motor shafts, the tapping precision is high, and the efficiency is fast.

[0059] The above examples only express one or several embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A motor shaft thread tapping and clamping mechanism, characterized in that, include: frame; The first clamping module is vertically mounted on the frame. The first clamping module is equipped with a rotation limiting frame that can limit the motor shaft and a limiting ring that can continuously and dynamically limit the motor shaft. The second clamping module is vertically mounted on the frame and located directly below the rotation limiting frame; the second clamping module is equipped with a fixed limiting frame that can cooperate with the rotation limiting frame to clamp the motor shaft; A coaxial detection module is vertically mounted on the frame and positioned near the rear end of the first clamping module; The correction module is vertically mounted on the frame and positioned near the front end of the first clamping module.

2. The motor shaft thread tapping and clamping mechanism according to claim 1, characterized in that, The first clamping module also includes a first support frame and a rotary driver capable of driving the rotation limit frame to rotate. The limiting ring is fixedly mounted on the first support frame; The rotating limiting frame is rotatably mounted on the right side of the first support frame and is located close to the limiting ring; The rotary driver is fixedly mounted on the left side of the first support frame and is connected to the rotation limit ring via a transmission connection.

3. The motor shaft thread tapping and clamping mechanism according to claim 1, characterized in that, The rotating limiting frame consists of a first limiting plate, a connecting shaft, and a second limiting plate that are coaxially and fixedly connected in sequence. Both the first limiting plate and the second limiting plate are provided with a first slot, and multiple first slots are provided circumferentially along the axis of the connecting shaft.

4. The motor shaft thread tapping and clamping mechanism according to claim 1, characterized in that, The first clamping module also includes a connecting frame and a guide ring capable of limiting the motor shaft on the rotation limiting frame in real time; The guide ring is coaxially fixed to the right side of the rotation limit frame via the connecting frame.

5. The motor shaft thread tapping and clamping mechanism according to claim 2, characterized in that, The first clamping module also includes a first linear driver capable of driving the first support frame to move longitudinally. The first linear driver is fixedly mounted vertically at the bottom of the frame, and its output shaft passes through the frame and is fixedly connected to the first support frame.

6. The motor shaft thread tapping and clamping mechanism according to claim 1, characterized in that, The second clamping module also includes a second linear driver capable of driving the fixed limiting frame to move longitudinally closer to or away from the rotating limiting frame; The second linear drive is fixedly mounted vertically at the bottom of the frame, with its output shaft passing through the frame and facing the rotation limit frame; The fixed limiting frame is vertically fixed to the drive end of the second linear actuator.

7. The motor shaft thread tapping and clamping mechanism according to claim 1, characterized in that, The coaxial detection module has two sets of detection units that can approach each other; and each set of detection units has a detection frame that can abut against both sides of the motor shaft and a distance sensor that can detect the displacement stroke of the detection frame.

8. The motor shaft thread tapping and clamping mechanism according to claim 7, characterized in that, The detection unit includes a first mounting bracket, a second guide rod, a spring, and a flange; Two second guide rods are provided, which are vertically arranged on the rear side of the detection frame and the rod part of the second guide rod passes through the first mounting frame and slides in cooperation with the first mounting frame; each second guide rod is also coaxially sleeved with a spring, and the two ends of the spring abut against the first mounting frame and the detection frame respectively; The flange is coaxially fixedly disposed at the end of the second guide rod; The ranging sensor is vertically mounted on the first mounting frame with its detection end facing the frame.

9. The motor shaft thread tapping and clamping mechanism according to claim 1, characterized in that, The correction module is equipped with a correction plate and an electric push rod that can drive the correction plate to correct the front end of the motor shaft.

10. A clamping method for a motor shaft thread tapping clamping mechanism, applied to the motor shaft thread tapping clamping mechanism as described in any one of claims 1-9, comprising the following steps: S1: The worker places the motor shaft to be processed horizontally at the loading position of the rotating limit frame and clamps it through the first slot, so that the tail of the motor shaft abuts against the limit ring to ensure that the motor shaft can be placed in a uniform posture; the external power supply is connected to drive the rotary drive to operate, the output shaft of the rotary drive rotates and drives the rotating limit frame to rotate, so that the motor shaft is transferred from the loading position to the processing position in sequence. S2: After the motor shaft is transferred to the machining position, the second linear drive is driven to move, and the output shaft extends and retracts, driving the fixed limit frame to move longitudinally. The rotating limit frame works in conjunction with the fixed limit frame to limit and clamp the motor shaft. At the same time, the fixed limit frame moves synchronously to achieve the initial fixation of the motor shaft. S3: When the motor shaft is in the machining position, the coaxial detection module starts working. It uses a distance sensor set in the detection unit to detect the axis offset of the motor shaft in real time and outputs detection data to obtain the coaxiality information of the motor shaft relative to the tapping equipment spindle. S4: Based on the detection results of the coaxial detection module, the first clamping module and the second clamping module are driven to move respectively. The clamping positions of the rotation limit frame and the fixed limit frame are adjusted by extending or retracting the output shaft of the linear driver, thereby dynamically correcting the spatial position of the motor shaft to ensure that it remains coaxial with the tapping equipment. S5: During the clamping and straightening process, the electric push rod is driven to move the straightening plate horizontally close to the front end of the motor shaft. The inclined surface of the straightening plate is used to flexibly guide the end of the motor shaft, ensuring that the front end of the motor shaft and the limit ring make precise contact. S6: After completing the coaxiality and end correction, the fixed limit frame and the movable limit frame move synchronously towards each other to stably clamp the motor shaft in the machining position, completing the final clamping preparation before tapping.

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