Automatic hub grinding equipment

Abstract

The utility model relates to the field of hub grinding equipment, in particular to automatic hub grinding equipment. The polishing machine comprises a workbench, a polishing mechanical arm, a polishing mechanism frame, a sand stripping device, a product containing device, a control cabinet, the workbench and a protective cover, and a polishing mechanism is installed on the polishing mechanical arm and comprises a polishing support, a polishing motor and a polishing disc; the end, deviating from the end connected with the polishing manipulator, of the polishing support is provided with a linkage mechanism which drives the polishing disc to move in the direction away from a to-be-polished product after the polishing disc makes contact with the to-be-polished product on the product containing device, and the polishing support is further provided with a limiting mechanism which limits the movement distance of the polishing disc driven by the linkage mechanism. After the prior art is improved, through the linkage mechanism and the limiting mechanism on the polishing support, when products of different sizes are polished, the polishing pressure between the polishing disc and the surfaces of the products can be adjusted to achieve the ideal polishing effect, the polishing mechanism and abrasive paper can be automatically replaced, the polishing efficiency is high, and the labor cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of wheel hub grinding equipment, in particular to an automatic wheel hub grinding equipment. Background Art

[0002] The wheel hub is a cylindrical metal part that supports the tire with the axis as the center of the inner contour of the vehicle tire. It is the foundation of the tire. The shape of the wheel hub determines the heat dissipation efficiency of the brake system, so it is critical to choose a wheel hub with a reasonable shape. While considering heat dissipation and aesthetics, you should also pay attention to the service life of the wheel hub. If there are too few supporting strips, the ability to resist distortion and impact and the strength will be poor, and the service life of the wheel hub will be shortened. In order to ensure the service life and aesthetics of the wheel hub at the same time, repairing and polishing the wheel hub is an essential step.

[0003] The current machine grinding also has the problem of poor grinding quality. The grinding wheel hub type is single and the structure is simple. It is difficult to achieve accurate grinding for the wheel hub with complex curved surface. Moreover, the degree of automation is not high. Many processes require manual assistance, such as grinding mechanism, sandpaper, etc., and the labor cost is relatively high.

[0004] In view of this, the Chinese invention patent with publication number CN110421423A discloses an automatic grinding and polishing system for automobile wheel hubs, including a grinding and polishing workbench, a clamping device fixed on the grinding and polishing workbench for clamping and fixing automobile wheel hubs to be ground and polished, a six-degree-of-freedom industrial robot, a grinding and polishing end arranged on the wrist joint of the industrial robot, and a control cabinet for controlling the system. A wheel hub grinding and polishing tool library for holding a variety of processing tools is also provided on the grinding and polishing workbench. The present invention is provided with its own wheel hub grinding and polishing tool library, which can realize automatic replacement of grinding and polishing tools as needed, but the pneumatic floating grinding spindle of the industrial robot is only connected to the tool by a cylindrical clamp. During the grinding process, the tool is prone to loosening, falling off, and deflection, which not only has a poor grinding effect but also easily brings certain safety risks to the tool.

[0005] In view of this, a Chinese utility model patent with announcement number CN216098090U discloses an automatic quick-change device for replacing grinding tools, including a quick-change female disc arranged at the bottom of the grinding tool and a quick-change male disc arranged at the free end of the mechanical arm of an external industrial robot, the quick-change male disc is arranged in a flange shape, a plurality of through holes are opened on the outer peripheral surface of the neck of the quick-change male disc, locking steel balls are embedded in the through holes, a plurality of air holes are opened on the outer peripheral surface of the disc part of the quick-change male disc, the air holes are connected with the through holes through the inside of the quick-change male disc, a center hole connected to the neck of the quick-change male disc is opened in the center of the quick-change female disc, and an annular groove is opened on the inner surface of the center hole; the above structure solves the stability problem between the grinding spindle and the grinding mechanism through the cooperation of the quick-change male disc and the quick-change female disc, but when grinding products of different sizes, the grinding pressure between the grinding disc and the product surface cannot be adjusted to an appropriate range accordingly, resulting in unsatisfactory grinding effect.

[0006] Therefore, it is necessary to improve the above shortcomings of the prior art. Summary of the invention

[0007] The technical problem to be solved by the utility model is to provide a new type of automatic wheel hub grinding equipment with adjustable grinding pressure between the grinding disc and the product surface in view of the deficiencies of the above-mentioned prior art.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wheel hub automatic grinding equipment, comprising a workbench, a grinding robot and a product placement device, the grinding robot and the product placement device are both installed on the workbench, the grinding robot is installed with a grinding mechanism, the grinding mechanism includes a grinding bracket connected to the grinding robot at one end, a grinding disc installed on the grinding bracket and a driving member installed on the grinding bracket for driving the grinding disc, the grinding bracket is deviated from the end connected to the grinding robot and is provided with a linkage mechanism for driving the grinding disc to move away from the product to be polished when the grinding disc contacts the product to be polished on the product placement device, and the grinding bracket is also provided with a limiting mechanism for limiting the moving distance of the grinding disc driven by the linkage mechanism.

[0009] By adopting the above technical solution, when the grinding disc contacts and grinds the product to be polished on the product placement device, the grinding disc can be driven to move away from the product to be polished through the linkage mechanism, and the moving distance of the grinding disc driven by the linkage structure can be limited by the limiting mechanism. Therefore, when polishing products of different sizes, the grinding pressure between the grinding disc and the product surface can be adjusted to achieve the ideal grinding effect.

[0010] The above technical solution is further configured as follows: the linkage mechanism includes a floating bracket fixedly connected to the grinding disc and the driving member, a first connecting rod is respectively provided at the upper ends of the two side surfaces between the floating bracket and the grinding bracket, and one or more second connecting rods are respectively provided at the middle and lower ends of the two side surfaces between the floating bracket and the grinding bracket, and there is a gap between the floating bracket and the grinding bracket.

[0011] By adopting the above technical solution, when the grinding disc contacts the product to be polished on the product placement device for grinding, the grinding disc is pushed by the reaction force to cause the floating bracket to move away from the product to be polished, and then the first connecting rod and the second connecting rod are deflected at an angle relative to the grinding bracket, thereby achieving the goal that the grinding disc can move away from the product to be polished during grinding.

[0012] The above technical solution is further configured as follows: the limiting mechanism includes a support assembly installed on the side of the grinding bracket at the connection point between the first connecting rod and the grinding bracket, close to the grinding robot arm; one end of the first connecting rod close to the support assembly abuts against the support assembly during the downward rotation process; and the support assembly can adjust the height of the abutment point with the first connecting rod.

[0013] By adopting the above technical solution, during grinding, the grinding disc contacts the surface of the product and presses downward, driving the floating bracket to deflect upward, and the first connecting rod and the second connecting rod are deflected. When the first connecting rod rotates downward close to one end of the support assembly and abuts against the support assembly, the first connecting rod stops rotating under the action of the lever, so that the floating bracket and the grinding disc stop deflecting upward, thereby playing a role of positioning restriction. When it is necessary to adjust the offset distance of the grinding disc during grinding, it is only necessary to adjust the height of the support assembly accordingly, thereby realizing that the grinding pressure of the grinding disc on the product surface can be manually adjusted during grinding.

[0014] The above technical solution is further configured as follows: the supporting assembly is a micro cylinder, and a supporting portion is provided in the extension direction of the first connecting rod toward the connection point of the grinding bracket, and the supporting portion can abut against the movable end of the micro cylinder during the downward rotation process, and the micro cylinder is connected to the air source from the grinding robot.

[0015] By adopting the above technical solution, the polishing robot controls the extended length of the active end of the pressure-adjusting micro-cylinder connected to the air source to abut against the support part, and can adjust the height of the abutment point between the active end of the micro-cylinder and the support part, thereby adjusting the upward offset distance of the floating bracket.

[0016] The above technical solution is further configured as follows: the floating bracket includes an upper fixed block, a lower fixed block and a grinding column clamped between the upper fixed block and the lower fixed block, the upper fixed block and the lower fixed block are respectively provided with a semicircular groove that can clamp the grinding column after buckling, the upper fixed block and the lower fixed block are detachably fixedly connected, the upper fixed block is provided with a fixing groove at one end facing the lower fixed block, and the lower fixed block is provided with a fixing block matching the fixing groove at one end facing the upper fixed block, the first connecting rod is connected to the upper fixed block, and the second connecting rod is connected to the lower fixed block, the grinding motor and the grinding disc are fixedly installed at the front end of the grinding column, and a proofreading reference rod extending to the front end of the grinding column is detachably installed on the side surface of the lower fixed block, the proofreading reference rod is provided with a first calibration hole near the front end of the grinding column, and the front end of the grinding column is provided with a second calibration hole matching the first calibration hole.

[0017] By adopting the above technical solution, the upper fixed block and the lower fixed block are detachable. When the grinding disc needs to be replaced, the grinding column can be conveniently removed and replaced, thereby improving the reuse rate. After replacing the grinding column, the position of the grinding column can be calibrated by calibrating the first calibration hole on the reference rod and the second calibration hole at the front end of the grinding column to see whether it is installed in place.

[0018] The above technical solution is further configured as follows: the driving member is a driving motor drivingly connected to the grinding disc, and the driving motor is also electrically connected to the grinding robot.

[0019] By adopting the above technical solution, the driving motor drives the grinding disc to rotate through the transmission connection, and the grinding robot can automatically control the driving motor, thereby realizing automation.

[0020] The above technical solution is further configured as follows: a grinding spindle is provided on the free end of the grinding robot, a quick-change male disc is installed on the grinding spindle, a quick-change female disc is provided on the grinding bracket, a cylindrical protrusion is provided on the quick-change male disc close to one end of the quick-change female disc, a plurality of through holes are provided in the circumference of the cylindrical protrusion, locking balls are embedded in the through holes, a plurality of air holes are provided on the outer circumferential surface of the quick-change male disc, the air holes are connected with the through holes through the inside of the quick-change male disc, the air holes are connected with the air source at the grinding spindle, the quick-change female disc is provided with a cylindrical groove matching with the cylindrical protrusion, an annular groove matching with the locking ball is provided on the inner side surface of the cylindrical groove, a positioning pin is provided on the quick-change male disc, and a positioning pin hole matching with the positioning pin is provided on the quick-change female disc.

[0021] By adopting the above technical solution, when it is necessary to replace the grinding mechanism, the grinding robot with the quick-change male disc is moved toward the quick-change female disc, so that the quick-change male disc is aligned and connected with the quick-change female disc. After alignment, the external air source is ventilated through the air holes on the outer peripheral surface of the quick-change male disc, so that the gas squeezes the locking ball located in the quick-change male disc outward, so that the locking ball is abutted against the annular groove of the quick-change female disc to achieve a locking effect; when it is necessary to remove the grinding mechanism, it is only necessary to turn off the external air source, and the locking ball is no longer squeezed and abutted against the annular groove. At this time, the grinding robot is moved away to separate the quick-change male disc from the quick-change female disc to achieve a separation effect.

[0022] The above technical solution is further configured as follows: the wheel hub automatic grinding equipment also includes a control cabinet for system control and a grinding mechanism frame for placing a grinding mechanism, the grinding mechanism frame and the grinding robot are electrically connected to the control cabinet, a number of suspension seats are evenly distributed on the grinding mechanism frame, the suspension seats are provided with suspension grooves, the grinding bracket is provided with a suspension block that cooperates with the suspension seat, the suspension block is provided with a suspension convex ring that cooperates with the suspension groove, and the suspension seat is provided with a sensing part that can sense whether a grinding mechanism is placed on the suspension seat.

[0023] The above technical solution is adopted, by setting up a control cabinet, the grinding robot and the grinding mechanism frame are uniformly controlled to work in coordination. When the grinding robot places the grinding mechanism, the convex ring on the suspension block on the grinding bracket is inserted into the groove of the suspension seat on the grinding mechanism frame, so that the grinding mechanism is placed in the designed position, and then the grinding robot closes the locking mechanism, and removes the grinding spindle to separate it from the grinding mechanism; when the grinding robot replaces the grinding mechanism, the grinding spindle is first moved to the grinding mechanism to be replaced, and the locking mechanism is started to fix the grinding spindle and the grinding mechanism together. Then the grinding spindle is moved upward to drive the grinding mechanism to separate from the suspension seat, thereby completing the replacement of the grinding spindle; the idle suspension seat can be identified by the induction control system, so that the grinding mechanism can be accurately placed back to its original position.

[0024] The above technical solution is further configured as follows: the wheel hub automatic grinding equipment also includes a sand changing device electrically connected to the control cabinet, the sand changing device includes a sand changing table, sand placing discs on the sand changing table whose number is the same as the suspension seat and whose sizes correspond to the grinding discs, a sand stripping disc extending from the sand changing table toward the grinding robot, and a sandpaper sensing suction cup located next to the sand stripping disc, the sand placing disc is provided with a plurality of positioning rods in the circumference and a sand changing cylinder at the lower end, the sand changing cylinder is fixedly mounted on the sand changing table and the movable end is connected to the sand placing disc, the upper end of the sand stripping disc is provided with a sand stripping groove whose opening is facing the grinding robot, the open end of the sand stripping groove is provided with a stripping baffle, the height of the stripping baffle is lower than the sand stripping groove to form a step shape.

[0025] By adopting the above technical scheme, when the sandpaper needs to be replaced, the grinding robot moves the grinding disc to the stripping baffle so that the lower surface of the sandpaper sticking to the bottom of the grinding disc contacts the upper surface of the stripping baffle, and then the grinding robot pushes the grinding disc in the direction of the stripping groove, and the side of the sandpaper is blocked by the step formed by the stripping baffle and the stripping groove, so that the sandpaper is separated from the grinding disc, thereby realizing the stripping of the sandpaper; then the grinding robot moves the grinding disc to between the positioning rods above the corresponding sanding disc, and at this time, the sand changing cylinder is started to push the sanding disc upward until the flocked surface of the sandpaper above contacts the lower end surface of the grinding disc and sticks the topmost piece of sandpaper, and then the sand changing cylinder automatically falls back, thereby realizing the replacement of the new sandpaper; after stripping the sandpaper or replacing the new sandpaper, the grinding robot will first move the grinding disc to the sandpaper sensing suction cup to confirm whether the previous operation is successful, and if it is not successful, repeat the previous operation.

[0026] The above technical solution is further configured as follows: the product placement device includes a placement base and a placement table rotatably connected to the placement base, a rotating shaft is provided between the placement table and the placement base, a placement table driving motor connected to the rotating shaft is provided in the placement base, a first clamp and a second clamp are provided on the placement table and are relatively set, the first clamp and the second clamp both include two clamping protrusions, and the clamping protrusions are provided with a plurality of stepped clamping slots, the placement table is provided with a movable groove in the middle position of the first clamp, a movable pull rod passing through the movable groove is provided in the middle of the first clamp, a clamp movable cylinder fixedly connected to the placement table is provided at one end of the movable groove away from the movable pull rod, the movable end of the clamp movable cylinder is fixedly connected to the movable pull rod, an axial positioning rod detachably connected to the placement table and a plurality of axial mounting positions matching the axial positioning rod are also provided on the placement table near the second clamp, and a foot valve installed on the workbench for controlling the placement table driving motor is provided next to the placement base.

[0027] By adopting the above technical scheme, when placing the wheel hub, the wheel hub is first placed on the clamping protrusion of the second clamp on the placement table, and then the distance between the first clamp and the second clamp is adjusted by the movable cylinder so that the clamping protrusion on the first clamp is tightly attached to clamp the wheel hub, and the axial positioning rod is adjusted to abut against the inner side of the wheel hub, which can prevent the wheel hub from axially rotating during grinding and affecting the grinding effect; when different angles of the wheel hub need to be ground, the foot valve is stepped on to control the start of the placement table drive motor to drive the placement table to rotate to adjust the wheel hub, thereby facilitating grinding at different angles.

[0028] The above technical solution is further configured as follows: a dust cover rotatably connected to the grinding mechanism frame is provided above the suspension seat, and a support rod is provided at one end connected to the dust cover and the other end connected to the grinding mechanism frame at the edge of the dust cover.

[0029] By adopting the above technical solution, when the grinding system is working, the dust cover can be lifted up and the support rod can fix the dust cover. When it is not working, the dust cover can be pulled down to shield the grinding mechanism from dust.

[0030] The above technical solution is further configured as follows: the automatic wheel hub grinding equipment also includes a protective cover installed on the periphery of the workbench, and a side surface of the protective cover is provided with an access door for entry and exit.

[0031] By adopting the above technical solution, when the system is grinding, the protective cover can isolate dust to avoid polluting the surrounding environment, and it is convenient to clean up after the work is completed.

[0032] The beneficial effects achieved by the utility model are as follows: through the linkage mechanism and the limit mechanism on the grinding bracket, when grinding products of different sizes, the grinding pressure between the grinding disc and the product surface can be adjusted to achieve an ideal grinding effect; through the grinding mechanism and the sand changing device, it is possible to automatically replace the grinding mechanisms of different sizes and the corresponding sandpaper for fine grinding as needed, and automated grinding improves the grinding efficiency, thereby saving labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the external overall structure of an embodiment of the utility model;

[0034] Figure 2 It is a schematic diagram of the overall internal layout structure of an embodiment of the utility model;

[0035] Figure 3 It is a structural schematic diagram of the grinding mechanism of an embodiment of the utility model;

[0036] Figure 4 It is a schematic diagram of the exploded structure of the grinding mechanism of the embodiment of the utility model;

[0037] Figure 5 It is an exploded schematic diagram of the quick-change structure of the grinding mechanism of an embodiment of the utility model;

[0038] Figure 6 It is a schematic diagram of the quick-change master disc structure of the grinding mechanism of the embodiment of the utility model;

[0039] Figure 7 It is a structural schematic diagram of a grinding mechanism frame of an embodiment of the utility model;

[0040] Figure 8 yes Figure 7 A partial enlarged view of the middle part;

[0041] Fig. 9 This is a schematic structural diagram of a sand changing device according to an embodiment of the utility model;

[0042] Fig.10 yes Fig. 9 A partial enlarged view of point B in the middle;

[0043] Fig.11 This is a schematic diagram of the structure of the product placement device of the embodiment of the utility model. Figure 1 ;

[0044] Fig.12 This is a schematic diagram of the structure of the product placement device of the embodiment of the utility model. Figure 2 . Implementation

[0045] The utility model is further described below in conjunction with embodiments:

[0046] like Figure 1-3 As shown in the figure, a wheel hub automatic grinding equipment includes a workbench 1, a grinding robot 2 and a product placement device 3, the grinding robot 2 and the product placement device 3 are both installed on the workbench 1, the grinding robot 2 is installed with a grinding mechanism 4, the grinding mechanism 4 includes a grinding bracket 43, a grinding motor 41 electrically connected to the grinding robot 2, and a grinding disc 42 transmission-connected to the grinding motor 41; the grinding bracket 43 is provided with a grinding bracket 43 connected to the grinding robot 2 and a floating bracket 44 fixedly connected to the grinding motor 41 and the grinding disc 42, and the grinding bracket 43 and the floating bracket 44 are connected to each other. A first connecting rod 45 is respectively provided at the upper ends of the two side surfaces, and a second connecting rod 46 is respectively provided at the lower ends of the two side surfaces between the grinding bracket 43 and the floating bracket 44. There is a gap between the grinding bracket 43 and the floating bracket 44. A supporting portion 47 is provided in the extending direction of the first connecting rod 45 toward the connection point between the first connecting rod 45 and the grinding bracket 43. A micro cylinder 48 with adjustable height is provided at the corresponding position below the supporting portion 47. The micro cylinder 48 is fixedly connected to the lower end of the grinding bracket 43. The supporting portion 47 can abut against the movable end of the micro cylinder 48 during the downward rotation process. The micro cylinder 48 is connected to the air source from the grinding robot 2.

[0047] like Figure 3 , 4As shown in the figure, the floating bracket 44 includes an upper fixing block 441, a lower fixing block 442 and a grinding column 443 clamped between the upper fixing block 441 and the lower fixing block 442. The upper fixing block 441 and the lower fixing block 442 are respectively provided with a semicircular groove that can clamp the grinding column after buckling. The upper fixing block 441 and the lower fixing block 442 are fixedly connected by threads. The upper fixing block 441 is provided with a fixing groove 444 on one end facing the lower fixing block 442, and the lower fixing block 442 is provided with a fixing groove 444 on one end facing the upper fixing block 441. 44 is equipped with a fixed block 445, the first connecting rod 45 is connected to the upper fixed block 441, the second connecting rod 46 is connected to the lower fixed block 442, the grinding motor 41 and the grinding disc 42 are fixedly installed on the front end of the grinding column 443, and a calibration reference rod 446 extending to the front end of the grinding column 443 is threadedly installed on the side surface of the lower fixed block 442, and the calibration reference rod 446 is provided with a first calibration hole 447 near the front end of the grinding column 443, and the front end of the grinding column 443 is provided with a second calibration hole 448 matching the first calibration hole 447.

[0048] like Figure 5 , 6 As shown in the figure, a grinding spindle 21 is provided on the free end of the grinding manipulator 2, a quick-change male disc 22 is mounted on the flange of the grinding spindle 21, a quick-change female disc 431 is provided on the grinding bracket 43, a cylindrical protrusion 221 is provided at one end of the quick-change male disc 22 close to the quick-change female disc 431, a plurality of through holes 222 are provided in the circumference of the cylindrical protrusion 221, a locking ball 223 is embedded in the through hole 222, a plurality of air holes 224 are opened on the outer circumference of the quick-change male disc 22, and the air holes 224 are provided on the outer circumference of the quick-change male disc 22. 24 is connected to the through hole 222 through the inside of the quick-change male disk 22, the air hole 224 is connected to the air source at the grinding spindle 21, the quick-change female disk 431 is provided with a cylindrical groove 4311 that matches the cylindrical protrusion 221, and the inner side of the cylindrical groove 4311 is provided with an annular groove 4312 that matches the locking ball 223. The quick-change male disk 22 is provided with a positioning pin 225, and the quick-change female disk 431 is provided with a positioning pin hole 4313 that matches the positioning pin 225.

[0049] like Figure 7 , 8 As shown in the figure, the automatic wheel hub grinding equipment also includes a control cabinet 5 for system control and a grinding mechanism frame 6 for placing a grinding mechanism. The grinding mechanism frame 6 and the grinding robot 2 are electrically connected to the control cabinet 5. Eight suspension seats 61 are evenly distributed on the grinding mechanism frame 6. The suspension seats 61 are provided with suspension grooves 62. The grinding bracket 43 is provided with a suspension block 432 that cooperates with the suspension seat 61. The suspension block 432 is provided with a suspension convex ring 4321 that cooperates with the suspension groove 62. The suspension seat 61 is provided with a sensing member 63 that can sense whether a grinding mechanism 4 is placed on the suspension seat 61. A dust cover 64 rotatably connected to the grinding mechanism frame 6 is provided above the suspension seat 61. The edge of the dust cover 64 is provided with a support rod 65 that is connected to the dust cover 64 at one end and connected to the grinding mechanism frame 6 at the other end.

[0050] like Fig. 9 , 10 As shown in, the automatic wheel hub grinding equipment also includes a sand changing device 7 electrically connected to the control cabinet 5, the sand changing device 7 includes a sand changing table 71, eight sanding discs 72 located on the sand changing table 71 and having sizes corresponding to the grinding discs 42, a sand stripping disc 73 extending from the sand changing table 71 toward the grinding robot 2, and a sandpaper sensing suction cup 74 located next to the sand stripping disc 73. The sanding disc 72 is provided with a plurality of positioning rods 75 in the circumference, and a sand changing cylinder is provided at the lower end. The sand changing cylinder is fixedly mounted on the sand changing table 71, and a movable end is connected to the sanding disc 72. A sand stripping groove 731 with an opening facing the grinding robot 2 is provided at the upper end of the sand stripping disc 73, and a stripping baffle 732 is provided at the open end of the sand stripping groove 731. The height of the stripping baffle 732 is lower than the sand stripping groove 731 to form a step shape.

[0051] like Fig.11 , 12 As shown in the figure, the product placement device 3 includes a placement base 31 and a placement table 32 rotatably connected to the placement base 31, a rotating shaft 33 is provided between the placement table 32 and the placement base 31, a placement table driving motor 34 is provided in the placement base 31 and is transmission-connected to the rotating shaft 33, a first clamp 35 and a second clamp 36 are arranged opposite to each other on the placement table 32, the first clamp 35 and the second clamp 36 both include two clamping protrusions 37, and the clamping protrusions 37 are provided with five stepped clamping grooves 371, the placement table 32 is provided with a movable groove 38 in the middle position of the first clamp 35, and the first clamp 35 and the second clamp 36 are provided with a movable groove 38 in the middle position of the first clamp 35. A movable pull rod 351 passing through a movable groove 38 is provided in the middle of a clamp 35, and a clamp movable cylinder 352 fixedly connected to the placement table 32 is provided at the lower end of the movable groove 38 away from the movable pull rod 351. The movable end of the clamp movable cylinder 352 is fixedly connected to the movable pull rod 351. An axial positioning rod 39 threadedly connected to the placement table 32 and a plurality of axial mounting positions 391 matching the axial positioning rod 39 are also provided on the placement table 32 near the second clamp 36. A foot valve 341 installed on the workbench 1 for controlling the placement table drive motor 34 is provided next to the placement base 31.

[0052] like Figure 1 As shown in , the automatic wheel hub grinding equipment also includes a protective cover 8 installed on the periphery of the workbench 1, and a side of the protective cover 8 is provided with an access door 81 for entry and exit, and the access door 81 can be set as an automatic induction lifting door.

Claims

1. A wheel hub automatic grinding device, comprising a workbench, a grinding manipulator and a product placement device, wherein the grinding manipulator and the product placement device are both mounted on the workbench, the grinding manipulator is mounted with a grinding mechanism, and the grinding mechanism comprises a grinding bracket connected to the grinding manipulator at one end, a grinding disc mounted on the grinding bracket, and a driving member mounted on the grinding bracket for driving the grinding disc, characterized in that: The end of the grinding bracket that deviates from the connection with the grinding robot is provided with a linkage mechanism for driving the grinding disc to move away from the product to be polished when the grinding disc contacts the product to be polished on the product placement device. The grinding bracket is also provided with a limiting mechanism for limiting the moving distance of the grinding disc driven by the linkage mechanism.

2. The automatic wheel hub grinding device according to claim 1, characterized in that: The linkage mechanism includes a floating bracket fixedly connected to the grinding disc and the driving member, a first connecting rod is respectively provided at the upper ends of the two side surfaces between the floating bracket and the grinding bracket, and one or more second connecting rods are respectively provided at the middle and lower ends of the two side surfaces between the floating bracket and the grinding bracket, and there is a gap between the floating bracket and the grinding bracket.

3. The automatic wheel hub grinding device according to claim 2, characterized in that: The limiting mechanism includes a support assembly installed on the side of the grinding bracket at the connection point between the first connecting rod and the grinding bracket, close to the grinding robot. The end of the first connecting rod close to the support assembly abuts against the support assembly during the downward rotation process. The support assembly can adjust the height of the abutment point with the first connecting rod.

4. The automatic wheel hub grinding device according to claim 3, characterized in that: The supporting assembly is a micro cylinder, and a supporting portion is provided in the extending direction of the first connecting rod toward the connection point of the grinding bracket. The supporting portion can abut against the movable end of the micro cylinder during the downward rotation process, and the micro cylinder is connected to the air source from the grinding robot.

5. The automatic wheel hub grinding device according to claim 3, characterized in that: The floating bracket includes an upper fixed block, a lower fixed block and a grinding column clamped between the upper fixed block and the lower fixed block, the upper fixed block and the lower fixed block are respectively provided with a semicircular groove that can clamp the grinding column after buckling, the upper fixed block and the lower fixed block are detachably fixedly connected, the upper fixed block is provided with a fixing groove at one end facing the lower fixed block, and the lower fixed block is provided with a fixing block matching the fixing groove at one end facing the upper fixed block, the first connecting rod is connected to the upper fixed block, and the second connecting rod is connected to the lower fixed block, the driving member and the grinding disc are fixedly installed at the front end of the grinding column, and a proofreading reference rod extending to the front end of the grinding column is detachably installed on the side surface of the lower fixed block, the proofreading reference rod is provided with a first calibration hole near the front end of the grinding column, and the front end of the grinding column is provided with a second calibration hole matching the first calibration hole.

6. The automatic wheel hub grinding device according to claim 3, characterized in that: The driving member is a driving motor that is transmission-connected to the grinding disc, and the driving motor is also electrically connected to the grinding robot.

7. The automatic wheel hub grinding device according to any one of claims 1 to 6, characterized in that: A grinding spindle is provided on the free end of the grinding robot, a quick-change male disc is installed on the grinding spindle, a quick-change female disc is provided on the grinding bracket, a cylindrical protrusion is provided on the quick-change male disc close to one end of the quick-change female disc, a plurality of through holes are provided in the circumference of the cylindrical protrusion, locking balls are embedded in the through holes, a plurality of air holes are provided on the outer circumference of the quick-change male disc, the air holes are connected with the through holes through the inside of the quick-change male disc, the air holes are connected with the air source at the grinding spindle, the quick-change female disc is provided with a cylindrical groove matching with the cylindrical protrusion, an annular groove matching with the locking ball is provided on the inner side surface of the cylindrical groove, a positioning pin is provided on the quick-change male disc, and a positioning pin hole matching with the positioning pin is provided on the quick-change female disc.

8. The automatic wheel hub grinding device according to claim 7, characterized in that: The wheel hub automatic grinding equipment also includes a control cabinet for system control and a grinding mechanism frame for placing a grinding mechanism, the grinding mechanism frame and the grinding robot are electrically connected to the control cabinet, a number of suspension seats are evenly distributed on the grinding mechanism frame, the suspension seats are provided with suspension grooves, the grinding bracket is provided with a suspension block that cooperates with the suspension seat, the suspension block is provided with a suspension convex ring that cooperates with the suspension groove, and the suspension seat is provided with a sensing part that can sense whether a grinding mechanism is placed on the suspension seat.

9. The automatic wheel hub grinding device according to claim 8, characterized in that: The automatic wheel hub grinding equipment also includes a sand changing device electrically connected to the control cabinet, the sand changing device includes a sand changing table, sand placing discs on the sand changing table whose number is the same as the suspension seat and whose sizes correspond to the grinding discs, a sand stripping disc extending from the sand changing table toward the grinding robot, and a sandpaper sensing suction cup located next to the sand stripping disc, the sand placing disc is provided with a plurality of positioning rods in the circumference and a sand changing cylinder at the lower end, the sand changing cylinder is fixedly mounted on the sand changing table and the movable end is connected to the sand placing disc, the upper end of the sand stripping disc is provided with a sand stripping groove opening toward the grinding robot, the open end of the sand stripping groove is provided with a stripping baffle, the height of the stripping baffle is lower than the sand stripping groove to form a step shape.

10. The automatic wheel hub grinding device according to claim 1 or 2 or 3 or 4 or 5 or 6 or 8 or 9, characterized in that: The product placement device includes a placement base and a placement table rotatably connected to the placement base, a rotating shaft is provided between the placement table and the placement base, a placement table driving motor connected to the rotating shaft is provided in the placement base, a first clamp and a second clamp are provided on the placement table and are relatively set, the first clamp and the second clamp both include two clamping protrusions, and the clamping protrusions are provided with a plurality of stepped clamping slots, the placement table is provided with a movable groove in the middle position of the first clamp, a movable pull rod passing through the movable groove is provided in the middle of the first clamp, a clamp movable cylinder fixedly connected to the placement table is provided at the lower end of the movable groove away from the movable pull rod, the movable end of the clamp movable cylinder is fixedly connected to the movable pull rod, an axial positioning rod detachably connected to the placement table and a plurality of axial mounting positions matching the axial positioning rod are also provided on the placement table near the second clamp, and a foot valve installed on the workbench for controlling the placement table driving motor is provided next to the placement base.

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