A sandblasting protective fixture for preventing motor casing from deformation

Abstract

The invention relates to the field of motor housing sandblasting protective jigs and discloses an anti-deformation motor housing sandblasting protective jig, comprising a main mounting seat fixedly installed in a sandblasting processing area inside a sandblasting machine by bolts, a secondary mounting seat telescopically connected to the main mounting seat, and the sandblasting protective jig further comprising a bearing frame fixed to the main mounting seat and the secondary mounting seat, an internally threaded column rotatably mounted on the main mounting seat, and a threaded rod threadedly connected to the internally threaded column; the bearing frame is provided with a direction-changing component for controlling the sandblasting direction of the motor housing; the direction-changing frame is provided with a clamping component for clamping and limiting the inner wall of the motor housing; the sandblasting protective jig can rotate to adjust the motor housing processing angle, improve the motor housing processing effect, and enhance the effective support for the inner wall of the motor housing, thereby avoiding deformation of the motor housing caused by excessive injection pressure.

Description

Technical Field

[0001] The invention relates to the field of sandblasting protective jigs for motor housings, and in particular to a sandblasting protective jig for motor housings that prevents deformation. Background Art

[0002] Sandblasting is mainly used to improve the appearance and performance of motor housings. The sandblasting machine uses compressed air to form a high-speed jet beam, which sprays abrasives at high speed onto the surface of the motor housing to remove paint, rust, oxide scale and dirt on the surface of the motor housing, thereby improving the fatigue resistance and coating adhesion of the motor housing. During sandblasting, the motor housing is subjected to a large jet pressure. The motor housing is processed and limited by protective fixtures to maintain the stability of the sandblasting process of the motor housing. However, since the motor housing generally has a circular ring structure, the sandblasting fixture is not convenient for stable clamping and limiting, and it is also not convenient to sandblast different areas of the motor housing during processing.

[0003] Chinese patent CN214603831U discloses a watch case sandblasting protection jig, including a jig body and an upper plate, the top of the jig body is fixedly connected to the upper plate, second slide grooves are provided on both sides of the upper plate, two baffles are provided between the second slide grooves on both sides, both sides of the two baffles are slidably connected to the upper plate through sliders and second slide grooves, the outer sides of the two sliders are fixedly connected to threaded rods, a first slide groove is provided inside the upper plate and located on the outer side of the threaded rod, the first slide groove and the threaded rod are slidably connected, the outer sides of the two threaded rods and located on the outer side of the upper plate are threadedly connected with nuts, and second support blocks are symmetrically provided on both sides of the jig body. By arranging sliders, baffles, second slide grooves, screws, etc. for use in combination, the upper surface of the watch case can be freely protected, and sandblasting can be performed where sandblasting is required.

[0004] The above patent uses accordion cloth, sliding rods, slots, unlocking rods, etc. to cooperate with each other, so that the height of the jig body can be freely adjusted and the exposed periphery of the case can be sandblasted. However, the interior of the motor housing is a hollow structure. During the sandblasting process, some of the sprayed sand particles can easily enter the interior of the motor housing. If the sand particles in the motor housing are not discharged in time, they will penetrate between the housing and the protective jig, aggravating the wear of the inner wall of the motor housing and affecting the stability of the protective jig confined in the motor housing. The protective jig is prone to movement and falling off during sandblasting of the motor housing. In addition, during high-pressure sandblasting, some motor housings with thinner walls are easily deformed due to the influence of the sandblasting pressure, which reduces the processing quality of the motor housing. Summary of the Invention

[0005] In response to the above problems, a variable-speed motor casing sandblasting protective jig is provided. Through the changing direction component, the motor casing can be controlled to rotate back and forth during the sandblasting process, thereby discharging the sand that enters the motor casing. This solves the problem that if the sand in the motor casing is not discharged in time, it will penetrate between the casing and the protective jig, affecting the stability of the protective jig in the motor casing, causing the motor casing to move and fall off on the protective jig during sandblasting.

[0006] In order to solve the problems of the prior art, the present invention provides a sandblasting protective jig for motor housing with an anti-deformation form, wherein a main mounting seat is fixedly installed in the sandblasting processing area inside the sandblasting machine by bolts, and a secondary mounting seat is telescopically connected to the main mounting seat, and the sandblasting protective jig also includes a supporting frame fixed on the main mounting seat and the secondary mounting seat, an internal threaded column rotatably installed on the main mounting seat, and a threaded rod threadedly connected in the internal threaded column, and the threaded rod is rotatably installed on the secondary mounting seat; the supporting frame is provided with a changing component for controlling the sandblasting direction of the motor housing, the changing component includes a rotating arm rotatably installed on the supporting frame, a rotating rod is fixed on the rotating arm, a changing frame is rotatably installed on the rotating rod, a hydraulic rod is rotatably connected to the supporting frame, and the output end of the hydraulic rod is rotatably connected to the rotating arm; the rotation directions of the rotating arms on the main mounting seat and the secondary mounting seat are opposite; the changing frame is provided with a clamping component for clamping and limiting the inner wall of the motor housing, and the changing frame is provided with a transmission component for controlling the reciprocating rotation of the clamping component.

[0007] Preferably, the clamping assembly includes a rotating frame rotatably mounted on the changing frame, two groups of rectangular frames are fixedly mounted on the rotating frame, two groups of shifting mechanisms are symmetrically and slidingly connected to the rectangular frame about the rotating axis of the rotating frame, and the shifting mechanism is installed with an arc clamp seat for clamping the inner wall of the motor housing; the two groups of rectangular frames are fixedly connected coaxially, the shifting mechanisms on the two groups of rectangular frames are vertically distributed, and the circumferential length of the multiple arc clamp seats outside the two groups of rectangular frames after unfolding is the same as the circumferential length of the inner wall of the motor housing.

[0008] Preferably, the shift mechanism includes a moving frame slidably connected to the rectangular frame, the moving frame is fixedly connected to a mounting frame via bolts, and the mounting frame is fixedly mounted with an arc clamp seat.

[0009] Preferably, the rotating frame and the rectangular frame are provided with a power assembly for controlling the synchronous movement of multiple shifting mechanisms.

[0010] Preferably, the power assembly includes a servo motor fixed on the rotating frame, the output end of the servo motor is connected to a power shaft, a power rod is eccentrically connected to the power shaft, a transmission rod is rotatably connected to the power rod, and the transmission rod is rotatably connected to the movable frame.

[0011] Preferably, the transmission assembly includes a power gear coaxially fixed on the rotating rod, a transmission gear is meshedly connected to the side of the power gear, the transmission gear is rotatably mounted on the changing frame, the changing frame also has a driven gear rotatably mounted, a driven bevel gear is coaxially fixed to the driven gear, a driving bevel gear is meshedly connected to the side of the driven bevel gear, the driving bevel gear is rotatably mounted on the changing frame, and the driving bevel gear is fixedly connected to the rotating frame; the diameters of the power gear, transmission gear and driven gear decrease sequentially.

[0012] Preferably, the direction-changing frame is provided with a buffer component for buffering the reciprocating inertial force of the rotating frame to reduce wear.

[0013] Preferably, the buffer assembly includes a stand symmetrically fixed on the outer walls of both sides of the rotating frame, a plurality of hollow arc seats are fixedly installed on the stand, an arc buffer support rod is slidably connected in the hollow arc seat along the arc direction, and an arc-shaped round rod is fixedly connected in the middle position of the arc buffer support rod; the arc-shaped round rod is slidably connected to the hollow arc seat, and a buffer spring is provided on the outside of the arc rod, and the buffer spring is connected between the hollow arc seat and the arc buffer support rod; the upper and lower ends of the arc buffer support rod are arc structures, and the arc buffer support rods are distributed on the outer side of the rotating frame, and the rotating frame rotates back and forth and contacts the arc surfaces at both ends of the arc buffer support rod.

[0014] Preferably, both the main mounting seat and the auxiliary mounting seat are provided with a support assembly for supporting and limiting the position of the rotation frame.

[0015] Preferably, the support assembly includes a lower support frame fixed on the main mounting seat and the auxiliary mounting seat, the lower support frame is connected to an upper support frame for lifting, and the upper support frame is arranged directly below the rotating frame; an electric lifting rod is connected between the lower support frame and the upper support frame, and the upper support frame is fixed at the output end position of the electric lifting rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can control the motor housing to tilt back and forth during the sandblasting process through the change-direction assembly, clamp the clamping assembly on the inner wall of the motor housing, operate the hydraulic rod in the change-direction assembly, and control the hydraulic rods on both sides of the motor housing to output in reverse. The pulling directions on both sides of the motor housing are different, so that the motor housing is tilted and set between the left and right groups of support frames. During the processing, the motor housing is controlled to tilt back and forth in the left and right directions, so that the sand and gravel entering the inner wall of the motor housing are discharged outward autonomously under the action of gravity, thereby preventing sand from penetrating between the motor housing and the clamping assembly, and maintaining the stability of the connection between the motor housing and the clamping assembly.

[0018] 2. The present invention uses a transmission assembly and a clamping assembly to enable the motor housing to rotate back and forth along its own circumferential direction during the processing process. The direction-changing assembly causes the rotating arm and the direction-changing frame to rotate relative to each other during operation. The power gear, transmission gear, driven gear, driven bevel gear and active bevel gear in the direction-changing frame drive the rotating frame to rotate back and forth through meshing transmission. The rotating frame drives the motor housing to rotate back and forth synchronously through the clamping assembly, so that the motor housing rotates back and forth along its own circumferential direction while tilting back and forth left and right, thereby achieving correspondence between different areas on the outside of the motor housing and the rotation of the nozzle in the sandblasting machine, thereby expanding the sandblasting processing area on the outside of the motor housing.

[0019] 3. The present invention can effectively clamp and support the inner wall of the motor housing through the clamping assembly. The operating power assembly controls the shifting mechanism to extend outward in the rectangular frame. The shifting mechanism pushes the arc clamping seat to clamp and support the inner wall of the motor housing. Four groups of arc clamping seats are respectively provided on the sides of the main mounting seat and the auxiliary mounting seat. After the four groups of arc clamping seats are unfolded, the circumferential length of the support is the same as the circumferential length of the inner wall of the motor housing, thereby achieving effective support for a circle of the inner wall of the motor housing, so that when some motor housings with thin walls are sandblasted, the inner wall support strength is increased, avoiding local deformation caused by excessive sandblasting pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a schematic diagram of the three-dimensional structure of a support frame of a sandblasting protective fixture for an anti-deformation motor housing.

[0021] Figure 2 The present invention is a schematic diagram of the three-dimensional structure of the main mounting seat of a sandblasting protective fixture for an anti-deformation motor housing.

[0022] Figure 3 The diagram is a three-dimensional structural diagram of the upper support frame of a sandblasting protective fixture for an anti-deformation motor housing.

[0023] Figure 4 The present invention is a schematic diagram of the three-dimensional structure of a rotating frame of a sandblasting protective fixture for an anti-deformation motor housing.

[0024] Figure 5 The present invention is a schematic diagram of the three-dimensional structure of the clamping components of the anti-deformation sandblasting protective fixture for the motor housing.

[0025] Figure 6 The present invention is a schematic diagram of the three-dimensional structure of a hydraulic rod of a sandblasting protective fixture for an anti-deformation motor housing.

[0026] Figure 7 The present invention is a schematic diagram of the three-dimensional structure of a rotating arm of a sandblasting protective fixture for an anti-deformation motor housing.

[0027] Figure 8 The diagram is a cross-sectional structural diagram of a deflection frame of a sandblasting protective fixture for a motor housing.

[0028] Figure 9 The diagram is a side view of the arc clamp seat of a sandblasting protection fixture for an anti-deformation motor housing.

[0029] Figure 10 The present invention is a schematic diagram of the three-dimensional structure of an arc buffer support rod of a sandblasting protective fixture for an anti-deformation motor housing.

[0030] Figure 11 The present invention is a three-dimensional structural diagram of the shifting mechanism of a sandblasting protective fixture for an anti-deformation motor housing.

[0031] Figure 12 The diagram is a schematic diagram of the three-dimensional structure of the power shaft of a sandblasting protective fixture for an anti-deformation motor housing.

[0032] The numbers in the figure are:

[0033] 1. Sandblaster; 21. Main mounting base; 22. Secondary mounting base; 23. Carrier; 24. Internally threaded column; 25. Threaded rod; 3. Direction change assembly; 31. Rotating arm; 32. Rotating rod; 33. Direction change frame; 34. Hydraulic rod; 35. Transmission assembly; 351. Power gear; 352. Transmission gear; 353. Driven gear; 354. Driven bevel gear; 355. Driving bevel gear; 36. Buffer assembly; 361. Stand; 362. Hollow arc Seat; 363, arc buffer support rod; 364, arc-shaped round rod; 365, buffer spring; 4, clamping assembly; 41, rotating frame; 42, rectangular frame; 43, shifting mechanism; 431, moving frame; 432, mounting frame; 44, arc clamp seat; 45, power assembly; 451, servo motor; 452, power shaft; 453, power rod; 454, transmission rod; 5, support assembly; 51, lower support frame; 52, upper support frame; 53, electric-driven lifting rod. DETAILED DESCRIPTION

[0034] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] See also Figure 1-Figure 7As shown, a type of anti-deformation motor housing sandblasting protective fixture, a main mounting seat 21 is fixedly installed in the sandblasting processing area inside the sandblasting machine 1 by bolts, and a sub-mounting seat 22 is telescopically connected to the main mounting seat 21, and the sandblasting protective fixture also includes a supporting frame 23 fixed on the main mounting seat 21 and the sub-mounting seat 22, an internal threaded column 24 rotatably mounted on the main mounting seat 21, and a threaded rod 25 threadedly connected to the internal threaded column 24, and the threaded rod 25 is rotatably mounted on the sub-mounting seat 22; a direction-changing component 3 for controlling the sandblasting direction of the motor housing is provided on the supporting frame 23, and the direction-changing component 3 includes a rotating A rotating arm 31 is movably mounted on the carrier 23, a rotating rod 32 is fixed on the rotating arm 31, a changing frame 33 is rotatably mounted on the rotating rod 32, a hydraulic rod 34 is rotatably connected to the carrier 23, and the output end of the hydraulic rod 34 is rotatably connected to the rotating arm 31; the rotation directions of the rotating arms 31 on the main mounting seat 21 and the auxiliary mounting seat 22 are opposite; the changing frame 33 is provided with a clamping assembly 4 for clamping the inner wall of the motor housing, and the changing frame 33 is provided with a transmission assembly 35 for controlling the reciprocating rotation of the clamping assembly 4. The reciprocating rotation of the transmission assembly 35 can expand the sandblasting range of the motor housing.

[0036] The main mounting seat 21 is fixedly mounted on the sand leakage bottom plate in the sandblasting area of ​​the sandblasting machine 1. The bottom of the auxiliary mounting seat 22 is provided with a roller that fits on the sand leakage bottom plate of the sandblasting machine 1 and rolls. The motor housing is set between the left and right groups of carriers 23, and the motor housing is first sleeved on the outside of the clamping assembly 4 next to the main mounting seat 21. According to the length of the motor housing, the clamping assembly 4 next to the auxiliary mounting seat 22 is adjusted to move toward the inside of the motor housing, and the threaded rod 25 is controlled to rotate. Under the transmission action of the threaded rod 25 and the internal threaded column 24, the auxiliary mounting seat 22 moves toward the direction close to the main mounting seat 21. The auxiliary mounting seat 22 drives the side changing assembly 3 and the clamping assembly 4 to move synchronously, so that the clamping assembly 4 moves to the inside of the motor housing. The left and right groups of clamping assemblies 4 effectively clamp the inner walls on both sides of the motor housing to limit the position of the motor housing.

[0037] During sandblasting, the nozzle in the sandblasting machine 1 sprays sand onto the surface of the motor housing under high pressure to process the surface of the motor housing. The left and right groups of direction-changing components 3 cause the motor housing to perform left and right reciprocating tilting motion, so that the motor housing is in an inclined state during the sandblasting process, so that the sand entering the motor housing is discharged outward under the action of gravity, avoiding the sand from penetrating between the motor housing and the clamping component 4, keeping the clamping component 4 stably clamped and supported on the inner wall of the motor housing, and at the same time, the clamping component 4 is supported on both sides of the inner wall of the motor housing, increasing the support strength of the inner wall of the motor housing, avoiding local deformation of the motor housing when subjected to sandblasting pressure, and improving the protection of the motor housing against sandblasting.

[0038] The hydraulic rod 34 is operated to push the rotating arm 31 to rotate, and the hydraulic rods 34 on the main mounting seat 21 and the auxiliary mounting seat 22 are controlled to output in opposite directions, so that the rotating arms 31 on the left and right sides rotate in opposite directions, and the transmission assembly 35, the clamping assembly 4 and the motor housing clamped outside the clamping assembly 4 arranged between the two sets of rotating arms 31 are tilted and rotated, and the output direction and output displacement of the hydraulic rod 34 above the main mounting seat 21 and the auxiliary mounting seat 22 are continuously alternated, so that the motor housing is tilted and rotated back and forth in the left and right directions, so that the sand particles in the motor housing can be quickly discharged outward during the sandblasting process, and the rotating motor housing can effectively contact with the sprayed sand particles, thereby improving the surface treatment effect of the motor housing.

[0039] See also Figure 2-Figure 6 、 Figure 9 、 Figure 11 and Figure 12 As shown, the clamping assembly 4 includes a rotating frame 41 rotatably mounted on the changing frame 33, two groups of rectangular frames 42 are fixedly mounted on the rotating frame 41, two groups of shifting mechanisms 43 are symmetrically slidably connected to the rectangular frame 42 about the rotating axis of the rotating frame 41, and arc clamping seats 44 for clamping and limiting the inner wall of the motor housing are installed on the shifting mechanisms 43; the two groups of rectangular frames 42 are fixedly connected coaxially, the shifting mechanisms 43 on the two groups of rectangular frames 42 are vertically distributed, and the circumferential length of the multiple arc clamping seats 44 outside the two groups of rectangular frames 42 after unfolding is the same as the circumferential length of the inner wall of the motor housing.

[0040] Control multiple shifting mechanisms 43 to move outward synchronously on the rotating frame 41, and the shifting mechanisms 43 drive the arc clamping seats 44 to move outward synchronously, so that the arc clamping seats 44 are clamped and supported on the inner wall of the motor housing. Four groups of arc clamping seats 44 are respectively provided next to the main mounting seat 21 and the auxiliary mounting seat 22. The four groups of arc clamping seats 44 are distributed circumferentially inside the motor housing, and after the four groups of arc clamping seats 44 are unfolded and supported inside the motor housing, the circumferential length of the support is the same as the circumferential length of the inner wall of the motor housing, thereby achieving effective support for a circle of the inner wall of the motor housing. The inner walls on both sides of the motor housing are supported by the arc clamping seats 44, thereby improving the supporting strength of the inner wall of the motor housing and avoiding local deformation of some motor housings with thinner walls when subjected to sandblasting pressure.

[0041] See also Figure 2-Figure 6 、 Figure 9 、 Figure 11 and Figure 12 As shown, the shift mechanism 43 includes a moving frame 431 slidably connected to the rectangular frame 42 , a mounting frame 432 is fixedly connected to the moving frame 431 by bolts, and an arc clamping seat 44 is fixedly mounted on the mounting frame 432 .

[0042] The motor housing has many sizes. According to the change of the motor housing diameter, the arc clamp seat 44 corresponding to the inner wall size of the motor housing within a specific diameter range can be replaced. The arc clamp seat 44 is connected to the movable frame 431 through the bolts on the mounting frame 432. The disassembly and assembly of the arc clamp seat 44 is relatively convenient, ensuring that the arc clamp seat 44 can be completely and tightly fitted on the inner wall of the motor housing after movement and expansion, thereby improving the processing application range of the sandblasting protective fixture.

[0043] See also Figure 11 and Figure 12 As shown, a power assembly 45 for controlling the synchronous movement of multiple shifting mechanisms 43 is provided in the rotating frame 41 and the rectangular frame 42 .

[0044] The power assembly 45 can simultaneously control the multiple shifting mechanisms 43 in the rectangular frame 42 to move with the same displacement, maintaining the consistency of the movement of the arc clamp seat 44 outside the rectangular frame 42, so that the arc clamp seat 44 can be synchronously unfolded and supported on the inner wall of the motor housing.

[0045] See also Figure 11 and Figure 12 As shown, the power assembly 45 includes a servo motor 451 fixed on the rotating frame 41, the output end of the servo motor 451 is connected to a power shaft 452, a power rod 453 is eccentrically connected to the power shaft 452, the power rod 453 is rotatably connected to a transmission rod 454, and the transmission rod 454 is rotatably connected to the movable frame 431.

[0046] The servo motor 451 is operated to control the rotation of the power shaft 452, and the power shaft 452 controls the circular rotation of the power rod 453, so that the two ends of the transmission rod 454 connected between the power rod 453 and the mobile frame 431 rotate accordingly. The rotating transmission rod 454 pushes the mobile frame 431 connected in the rectangular frame 42 to move, thereby realizing the synchronous movement and deployment of multiple mobile frames 431 in the rectangular frame 42.

[0047] See also Figure 5-Figure 8 As shown, the transmission assembly 35 includes a power gear 351 coaxially fixed to the rotating rod 32, and the power gear 351 is meshed with a transmission gear 352, which is rotatably mounted on the changing frame 33. The changing frame 33 also has a driven gear 353 rotatably mounted thereon, and a driven bevel gear 354 is coaxially fixed to the driven gear 353. The driven bevel gear 354 is meshed with a driving bevel gear 355, which is rotatably mounted on the changing frame 33 and fixedly connected to the rotating frame 41; the diameters of the power gear 351, the transmission gear 352 and the driven gear 353 decrease in sequence.

[0048] When the rotating arm 31 and the changing frame 33 rotate, the changing frame 33 is sleeved and connected to the rotating rod 32 and rotates in a circular manner. The transmission gear 352 on the changing frame 33 meshes and rotates along the circumferential direction of the power gear 351. The diameter of the transmission gear 352 is smaller than the diameter of the power gear 351, so that the transmission gear 352 accelerates and rotates. When the transmission gear 352 rotates, the driven gear 353 on the side is accelerated through meshing transmission. The driven gear 353 drives the coaxially connected driven bevel gear 354 to rotate synchronously. The driven bevel gear 354 controls the main gear 351 through meshing transmission. The movable bevel gear 355 rotates, the active bevel gear 355 is fixedly connected to the rotating frame 41, and the control rotating frame 41 is connected to the side of the changing frame 33 for reciprocating rotation. Under the control of the transmission assembly 35, when the rotating arm 31 reciprocates to control the clamped motor housing to tilt and rotate in the left and right directions, the rotating frame 41 accelerates the reciprocating rotation along the axis direction of the motor housing. The rotating frame 41 drives the motor housing to reciprocate along its own axis through the clamping assembly 4, thereby expanding the contact range between the motor housing and the sand particles sprayed by the nozzle of the sand blasting machine 1, and improving the uniformity of the surface treatment of the motor housing.

[0049] See also Figure 6 、 Figures 8-10 As shown, a buffer assembly 36 is provided on the direction-changing frame 33 for buffering the reciprocating inertial force of the rotating frame 41 to reduce wear.

[0050] When the rotating frame 41 is driven by the transmission assembly 35 to reciprocate, the rotating frame 41 reciprocates once and contacts the buffer assemblies 36 on both sides of the change frame 33 respectively. Under the buffering action of the buffer assemblies 36, the inertia force of the rotating frame 41 during the high-speed reciprocating rotation is reduced, thereby reducing the wear of the rotating frame 41 during high-speed rotation.

[0051] See also Figures 8-10 As shown, the buffer assembly 36 includes a stand 361 symmetrically fixed on the outer walls of both sides of the rotating frame 41, and a plurality of hollow arc seats 362 are fixedly installed on the stand 361. An arc buffer support rod 363 is slidably connected in the hollow arc seat 362 along the arc direction, and an arc-shaped round rod 364 is fixedly connected in the middle position of the arc buffer support rod 363; the arc-shaped round rod 364 is slidably connected to the hollow arc seat 362, and a buffer spring 365 is provided on the outside of the arc rod 364, and the buffer spring 365 is connected between the hollow arc seat 362 and the arc buffer support rod 363; the upper and lower ends of the arc buffer support rod 363 are arc structures, and the arc buffer support rod 363 is distributed on the outer side of the rotating frame 41, and the rotating frame 41 rotates back and forth and contacts the arc surfaces at both ends of the arc buffer support rod 363.

[0052] When the rotating frame 41 is connected to the side of the changing frame 33 and rotates back and forth, the rotating frame 41 rotates back and forth once, and the two sides respectively contact the arc surfaces of the arc buffer support rod 363 set next to the changing frame 33, and the rotating frame 41 pushes the arc buffer support rod 363 to move along the arc direction of the hollow arc seat 362. The two sides of the hollow arc seat 362 are groove structures provided for the sliding of the arc buffer support rod 363. The middle position of the hollow arc seat 362 is slidably connected with the arc rod 364. When the arc buffer support rod 363 moves, it drives the arc rod 364 to move synchronously. The buffer spring 365 outside the arc rod 364 is compressed. Under the action of the spring compression, the inertia force of the reciprocating rotation of the rotating frame 41 can be effectively buffered to maintain the rotation stability of the rotating frame 41.

[0053] See also Figure 2 and Figure 3 As shown, both the main mounting seat 21 and the auxiliary mounting seat 22 are provided with a support assembly 5 for supporting and limiting the position of the rotating frame 41 .

[0054] When the sandblasting protection jig is not in use, the bottom of the clamping assembly 4 on both sides is supported by the support assembly 5 to prevent the clamping assembly 4 from moving downward under the action of gravity, so that the sandblasting protection jig is in a horizontal state when not in use, so that the motor housing can be placed on the outside of the clamping assembly 4.

[0055] See also Figure 2 and Figure 3 As shown, the support assembly 5 includes a lower support frame 51 fixed on the main mounting seat 21 and the auxiliary mounting seat 22, and an upper support frame 52 is connected to the lower support frame 51 for lifting, and the upper support frame 52 is arranged directly below the rotating frame 41; an electric lifting rod 53 is connected between the lower support frame 51 and the upper support frame 52, and the upper support frame 52 is fixed at the output end position of the electric lifting rod 53.

[0056] After the motor housing is sleeved on the outside of the clamping assembly 4, the auxiliary mounting seat 22 is controlled to move close to the main mounting seat 21, so that the clamping assembly 4 on the auxiliary mounting seat 22 moves into the inside of the motor housing, and the inner wall of the motor housing is clamped and limited by the left and right groups of clamping assemblies 4. The electric drive lifting rod 53 is operated to control the upper support frame 52 to move downward, so that the upper support frame 52 moves away from the rotating frame 41. At this time, the rotating frames 41 on the left and right sides are affected by the gravity of the motor housing clamped in the middle, and the rotating frame 41 can maintain a horizontal state. When the rotating arm rods 31 on the left and right sides are rotated and adjusted, the rotating frame 41 follows the turning frame 33 to rotate and tilt. At the same time, the rotating frame 41 is connected to the side of the turning frame 33 under the transmission action of the transmission assembly 35 to rotate, driving the clamped motor housing to rotate, tilt and rotate.

[0057] Working principle: The protective jig is installed in the sandblasting area of ​​the sandblasting machine 1. When not processing, the support assembly 5 is supported under the rotating frame 41. The motor housing is first placed on the outside of the clamping assembly 4 on the side of the main mounting seat 21. The position of the auxiliary mounting seat 22 is adjusted according to the length of the motor housing, and the threaded rod 25 is controlled to rotate. Under the threaded transmission action of the threaded rod 25 and the internal threaded column 24, the auxiliary mounting seat 22 moves toward the main mounting seat 21, so that the clamping assembly 4 next to the auxiliary mounting seat 22 moves into the interior of the motor housing. After the inner wall of the motor housing is clamped and limited by the clamping assemblies 4 on the left and right sides, the electric drive lifting rod 53 is operated to control the upper support frame 52 to move downward away from the rotating frame 41.

[0058] The servo motor 451 is operated to control the rotation of the power shaft 452, and the power shaft 452 drives the external fixed power rod 453 to rotate in a circle. The two ends of the transmission rod 454 connected between the power rod 453 and the movable frame 431 rotate accordingly. The rotating transmission rod 454 pushes the movable frame 431 to move in the rectangular frame 42, and the movable frame 431 pushes the arc clamp seat 44 to move outward and expand, so that the arc clamp seat 44 is clamped and supported inside the motor housing. Four groups of arc clamp seats 44 are provided next to the main mounting seat 21 and the auxiliary mounting seat 22. After the four groups of arc clamp seats 44 are expanded, they just support a circle of the inner wall of the motor housing. The clamping assembly 4 can not only limit the sandblasting position of the motor housing, but also improve the support strength of the inner wall of the motor housing, thereby avoiding the situation where the motor housing is locally deformed by the injection pressure during the sandblasting process.

[0059] The hydraulic rod 34 is operated to control the rotation of the rotating arm 31, and the rotating arm 31 on the main mounting seat 21 and the auxiliary mounting seat 22 rotate in opposite directions, so that the clamping assembly 4 between the left and right groups of carriers 23 and the clamped motor housing are in a tilted state. By regulating the output direction and output displacement of the hydraulic rod 34, the tilt direction and tilt angle of the motor housing can be adjusted, and the motor housing can be kept in a state of left and right reciprocating tilt rotation during the sandblasting process. Some of the sand particles sprayed into the inner wall of the motor housing are discharged to the outside of the motor housing under the action of gravity. At the same time, the motor housing in the tilted state can fully contact with the sprayed sand particles, thereby improving the external processing effect of the motor housing.

[0060] When the rotating arm 31 and the direction-changing frame 33 rotate, the power gear 351, the transmission gear 352, the driven gear 353, the driven bevel gear 354 and the driving bevel gear 355 in the direction-changing frame 33 drive the rotating frame 41 to rotate under the action of meshing transmission. The rotating frame 41 drives the clamped motor housing to rotate along its own axis, so that the motor housing can rotate back and forth while rotating to expand the range of sandblasting processing, thereby further improving the surface processing effect of the motor housing.

[0061] When the rotating frame 41 rotates back and forth, the rotating frame 41 rotates and contacts the end faces of the arc buffer support rods 363 on both sides, pushing the arc buffer support rods 363 to move along the circumferential direction of the hollow arc seat 362, and the movement of the arc buffer support rods 363 compresses the buffer springs 365. Under the buffering action of the springs, the influence of the inertial force on the rotating frame 41 during high-speed reciprocating rotation is reduced, thereby maintaining the stability of the reciprocating rotation of the rotating frame 41.

[0062] The above embodiments merely represent one or more embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A sandblasting protective fixture for a motor housing to prevent deformation, wherein a main mounting seat (21) is fixedly mounted in a sandblasting processing area inside a sandblasting machine (1) by bolts, and a secondary mounting seat (22) is telescopically connected to the main mounting seat (21), characterized in that: The sandblasting protective fixture further comprises a carrier frame (23) fixed on the main mounting seat (21) and the auxiliary mounting seat (22), an internal threaded column (24) rotatably mounted on the main mounting seat (21), a threaded rod (25) threadedly connected to the internal threaded column (24), and the threaded rod (25) rotatably mounted on the auxiliary mounting seat (22); The carrier (23) is provided with a direction-changing assembly (3) for controlling the sandblasting direction of the motor housing. The direction-changing assembly (3) comprises a rotating arm (31) rotatably mounted on the carrier (23), a rotating rod (32) being fixed on the rotating arm (31), a direction-changing frame (33) being rotatably mounted on the rotating rod (32), a hydraulic rod (34) being rotatably connected to the carrier (23), and an output end of the hydraulic rod (34) being rotatably connected to the rotating arm (31); The rotation directions of the rotating arms (31) on the main mounting seat (21) and the auxiliary mounting seat (22) are opposite; A clamping assembly (4) for clamping and limiting the inner wall of the motor housing is provided on the direction-changing frame (33), and a transmission assembly (35) for controlling the reciprocating rotation of the clamping assembly (4) is provided in the direction-changing frame (33).

2. The anti-deformation motor housing sandblasting protective fixture according to claim 1, characterized in that: The clamping assembly (4) comprises a rotating frame (41) rotatably mounted on the direction-changing frame (33), two groups of rectangular frames (42) being fixedly mounted on the rotating frame (41), two groups of shifting mechanisms (43) being symmetrically slidably connected to the rectangular frame (42) about the rotating axis of the rotating frame (41), and an arc clamping seat (44) for clamping and limiting the inner wall of the motor housing being mounted on the shifting mechanism (43); The two groups of rectangular frames (42) are fixedly connected along the same axis, the shifting mechanisms (43) on the two groups of rectangular frames (42) are vertically distributed, and the circumferential length of the plurality of arc clamping seats (44) outside the two groups of rectangular frames (42) after being unfolded is the same as the circumferential length of the inner wall of the motor housing.

3. The anti-deformation motor housing sandblasting protective fixture according to claim 2, characterized in that: The shifting mechanism (43) comprises a moving frame (431) slidably connected to the rectangular frame (42); a mounting frame (432) is fixedly connected to the moving frame (431) via bolts; and an arc clamping seat (44) is fixedly mounted on the mounting frame (432).

4. The anti-deformation motor housing sandblasting protective fixture according to claim 3, characterized in that: The rotating frame (41) and the rectangular frame (42) are provided with a power assembly (45) for controlling the synchronous movement of a plurality of shifting mechanisms (43).

5. The anti-deformation motor housing sandblasting protective fixture according to claim 4, characterized in that: The power assembly (45) includes a servo motor (451) fixed on the rotating frame (41); the output end of the servo motor (451) is connected to a power shaft (452); a power rod (453) is eccentrically connected to the power shaft (452); a transmission rod (454) is rotatably connected to the power rod (453); and the transmission rod (454) is rotatably connected to the moving frame (431).

6. The anti-deformation motor housing sandblasting protective fixture according to claim 1, characterized in that: The transmission assembly (35) includes a power gear (351) coaxially fixed on the rotating rod (32), a transmission gear (352) meshedly connected to the power gear (351), the transmission gear (352) rotatably mounted on the direction-changing frame (33), a driven gear (353) rotatably mounted on the direction-changing frame (33), a driven bevel gear (354) coaxially fixed to the driven gear (353), a driving bevel gear (355) meshedly connected to the driven bevel gear (354), the driving bevel gear (355) rotatably mounted on the direction-changing frame (33), and the driving bevel gear (355) fixedly connected to the rotating frame (41); The diameters of the power gear (351), the transmission gear (352) and the driven gear (353) decrease in sequence.

7. The anti-deformation motor housing sandblasting protective fixture according to claim 6, characterized in that: The direction-changing frame (33) is provided with a buffer component (36) for buffering the reciprocating inertial force of the rotating frame (41) to reduce wear.

8. The anti-deformation motor housing sandblasting protective fixture according to claim 7, characterized in that: The buffer assembly (36) comprises a stand (361) symmetrically fixed to the outer walls of both sides of the rotating frame (41); a plurality of hollow arc seats (362) are fixedly mounted on the stand (361); arc buffer support rods (363) are slidably connected to the hollow arc seats (362) along the arc direction; an arc-shaped round rod (364) is fixedly connected to the middle position of the arc buffer support rod (363); The arc-shaped round rod (364) is slidably connected to the hollow arc seat (362), and a buffer spring (365) is sleeved on the outside of the arc-shaped round rod (364), and the buffer spring (365) is connected between the hollow arc seat (362) and the arc buffer support rod (363); The upper and lower ends of the arc buffer rod (363) are arc-shaped structures, and the arc buffer rod (363) is distributed on the outer side of the rotating frame (41). The rotating frame (41) reciprocates and contacts the arc surfaces at both ends of the arc buffer rod (363).

9. The anti-deformation motor housing sandblasting protective fixture according to claim 2, characterized in that: The main mounting seat (21) and the auxiliary mounting seat (22) are both provided with a support assembly (5) for supporting and limiting the position of the rotation frame (41).

10. The anti-deformation motor housing sandblasting protective fixture according to claim 9, characterized in that: The support assembly (5) comprises a lower support frame (51) fixed on the main mounting seat (21) and the auxiliary mounting seat (22); an upper support frame (52) is connected to the lower support frame (51) in a lifting manner; and the upper support frame (52) is arranged directly below the rotating frame (41); An electric-driven lifting rod (53) is connected between the lower support frame (51) and the upper support frame (52), and the upper support frame (52) is fixed at the output end position of the electric-driven lifting rod (53).

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