Adjustable grinding equipment

Abstract

The invention relates to adjustable grinding equipment, and belongs to the technical field of grinding equipment. The device comprises a frame, a driving abrasive belt wheel and a driven abrasive belt wheel are rotationally installed on the frame, and the outer side of the driving abrasive belt wheel and the outer side of the driven abrasive belt wheel are sleeved with a polishing abrasive belt. The frame comprises a vertical support, a hinge shaft fixedly connected to the bottom of the vertical support, two belt wheel supports arranged on the left side and the right side of the hinge shaft respectively, a movable part assembled on the vertical support in an up-down guiding and sliding mode, and two connecting rod sets symmetrically arranged on the left side and the right side of the movable part. The driving abrasive belt wheel and the driven abrasive belt wheel are installed on the two belt wheel supports respectively, a lifting driving piece is installed on the vertical support, the lifting driving piece is in transmission connection with the movable piece, an installation main body is connected to the hinged shaft, a tensioning wheel set capable of moving up and down is arranged on the installation main body, and an elastic piece is connected between the tensioning wheel set and the installation main body. The part polishing device can polish corner areas of parts, and is wide in application range and high in polishing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, and in particular to an adjustable grinding equipment. Background Art

[0002] Grinding is an important process in the parts processing. Grinding can remove burrs generated during the parts processing, ensure the smooth surface of the parts, reduce friction and wear generated during the use of the parts, and extend the service life of the parts. Not only that, grinding can also correct the dimensional errors of the parts, ensure the matching accuracy between parts, and improve the assembly quality and overall performance.

[0003] A belt sander is a commonly used sanding tool. It removes burrs, rust, coatings, etc. on the surface of parts by rubbing the surface of parts with a high-speed rotating sand belt. It is used in the surface treatment of various materials such as metal, wood, and plastic. A belt sander in the prior art, such as a hand-pushed sand belt sander disclosed in a patent application document with application publication number CN105538098A, includes a frame, a motor, a sand belt, a motor sand belt wheel, and a sanding sand belt wheel. A moving wheel is installed at the bottom of the frame, and a handrail is provided on the frame. The motor and the sanding sand belt wheel are installed on the frame. The sand belt is installed between the motor sand belt wheel and the sanding sand belt wheel. When in use, the motor drives the motor sand belt wheel to rotate, thereby driving the sand belt to rotate at high speed to grind the surface of the part, thereby effectively removing burrs on the surface of the part.

[0004] The grinder has a good grinding effect when grinding the flat area of ​​the part, but when grinding the angular area of ​​the part, since the grinding belt is in a straight state, if the angular area of ​​the part is directly pressed on the grinding belt for grinding, the grinding belt cannot completely fit with the multiple side surfaces forming the angular area of ​​the part, which will cause uneven grinding of the angular area. The edge line position may also cause wear due to excessive pressure and excessive grinding, and the grinding effect is poor. If the multiple side surfaces forming the angular area are fit on the grinding belt for grinding in turn, it will take a lot of time, resulting in reduced grinding efficiency. Summary of the invention

[0005] The invention provides an adjustable grinding device to solve the technical problems that the grinding device in the prior art has poor grinding effect on the angular parts of parts and low grinding efficiency.

[0006] In order to solve the above problems, the present invention provides an adjustable grinding device adopting the following technical solutions: An adjustable grinding device comprises a frame, on which a driving grinding belt wheel and a driven grinding belt wheel with rotation axes extending in the front-back direction are rotatably mounted, the driving grinding belt wheel and the driven grinding belt wheel are spaced apart on the left and right sides of the frame, and a grinding belt is sleeved on the outer sides of the driving grinding belt wheel and the driven grinding belt wheel, the frame comprises a vertical bracket, a hinge shaft with an axis extending front-back and fixedly connected to the bottom of the vertical bracket, two pulley brackets which are respectively arranged on the left and right sides of the hinge shaft and one end close to the hinge shaft is rotatably sleeved on the hinge shaft, a movable part which is slidably mounted on the vertical bracket with upper and lower guides, and two connecting rod groups which are symmetrically arranged on the left and right sides of the movable part, and the two ends of the connecting rod group are respectively hinged to the movable part and the pulley bracket on the corresponding side; The driving grinding belt wheel and the driven grinding belt wheel are respectively installed on the two pulley brackets, and are both located at one end of the corresponding pulley bracket facing away from the hinge shaft. A lifting driving member is installed on the vertical bracket, and the lifting driving member is transmission-connected with the movable member to drive the movable member to reciprocate up and down. When the movable member moves downward, the two pulley brackets are driven to swing downward around the hinge shaft through two sets of connecting rods. The hinge shaft is connected to a mounting body, on which a tensioning wheel group capable of moving up and down is provided, and an elastic member is connected between the tensioning wheel group and the mounting body, which applies an upward elastic force to the tensioning wheel group so that the tensioning wheel group is pressed against the top inner wall of the grinding belt.

[0007] By adopting the above technical scheme, the two pulley brackets are rotatably sleeved on the hinge shaft. When the two pulley brackets are in a horizontal position, the grinding belt is in a straight and taut state. At this time, the bottom surface of the grinding belt can be used to contact the plane on the part to be polished to grind the flat part on the part; when it is necessary to polish the angular part on the part, the lifting drive member is started, and the lifting drive member drives the transmission screw to rotate, driving the movable member to move downward, and the movable member drives the pulley bracket to swing downward around the hinge shaft through the connecting rod group. In this process, the active grinding belt wheel and the driven grinding belt wheel approach each other, and the grinding belt changes from a tensioned state to a relatively relaxed state, and the elastic member recovers a certain The deformation causes the tensioning wheel group to move upward to tension the grinding belt, so that the grinding belt will not fall off the active grinding belt wheel and the driven grinding belt wheel. However, since the elastic member has restored a certain deformation, the elastic member can elastically retract and move within a certain distance, so that the grinding belt can still be in a relatively relaxed state. At this time, the angular part to be polished in the part is pressed on the bottom of the grinding belt, and the grinding belt will be concave inward to fit the outside of the angular area. The grinding belt and multiple side edges of the part used to form the edges are simultaneously fitted to the angular area, and not only the edges can be polished, but also the sides forming the edges can be polished, with better grinding effect and higher grinding efficiency.

[0008] When it is necessary to grind a sharper angular area, the lifting drive member is controlled to drive the movable member to continue to move downward, so that the grinding belt can become looser. At this time, the grinding belt is more deformed when pressed, so it can be wrapped around the outside of the sharper angular area for grinding. This allows the device to grind edges of different angles and has a wider range of applications.

[0009] Furthermore, the tensioning wheel group includes two vertical support rods arranged at intervals in the front and rear, a tensioning wheel rotatably installed between the tops of the two vertical support rods, and a horizontal support plate connected between the two vertical support rods and located below the tensioning wheel. The two vertical support rods are guided and slidably installed on the installation body in the up and down directions, the horizontal support plate is located above the installation body, and the elastic member is connected between the horizontal support plate and the installation body.

[0010] Furthermore, the mounting body includes a mounting base fixedly connected to the hinge shaft and a mounting plate movable up and down and arranged above the mounting base, the elastic member is connected between the horizontal support plate and the mounting plate, and a lifting and adjusting component is provided on the mounting base, and the lifting and adjusting component cooperates with the mounting plate to adjust the height position of the mounting plate.

[0011] By adopting the above technical solution, the grinding belt becomes loose due to deformation caused by long-term stress after long-term use. The height position of the tensioning wheel group can be adjusted. After the grinding belt becomes loose, the tensioning wheel group is adjusted to a higher position to further tension the grinding belt, thereby preventing the grinding belt from falling off and extending the service life of the grinding belt.

[0012] Furthermore, the lifting and lowering adjustment assembly includes an adjusting block and an adjusting screw. The adjusting block is guided and slidably assembled on the mounting base along the front-back direction. The adjusting screw extends along the front-back direction and is rotatably mounted on the mounting base. The adjusting screw cooperates with the adjusting block in spiral transmission. The adjusting block is provided with a pushing inclined surface, and the mounting plate is provided with a sliding inclined surface that cooperates with the pushing inclined surface. When the adjusting screw rotates, it drives the adjusting block to move along the front-back direction. The adjusting block pushes the sliding inclined surface on the mounting plate through the pushing inclined surface, thereby driving the mounting plate to move up and down.

[0013] By adopting the above technical solution, the adjusting block can be driven to move forward and backward by rotating the adjusting screw. When the adjusting block moves forward and backward, the cooperation of the pushing inclined surface and the pushing inclined surface drives the mounting plate to move up and down, thereby realizing the adjustment of the upper and lower positions of the mounting plate. The structure is simple and the adjustment method is simple.

[0014] Furthermore, at least one end of the adjusting screw extends to the outside of the grinding belt along the front-rear direction, and the end of the adjusting screw extending to the outside of the grinding belt is connected to a screw handle.

[0015] By adopting the above technical solution, at least one end of the adjusting screw extends to the outside of the grinding belt and is connected to a screw handle. The adjusting screw is driven to rotate by turning the screw handle, making adjustment easier.

[0016] Furthermore, a transmission screw extending in the up-down direction is threadedly installed on the movable part, and the lifting drive part has a driving output end that can rotate around a vertical axis. The driving output end of the lifting drive part is transmission-connected to the transmission screw, and the lifting drive part is used to drive the transmission screw to rotate, so as to drive the movable part to move up and down.

[0017] By adopting the above technical solution, the transmission connection between the lifting drive member and the movable member is realized, the structure is simple, and the assembly is convenient.

[0018] Furthermore, a grinding wheel with a rotation axis extending in the front-to-back direction is rotatably mounted on at least one pulley bracket, the grinding wheel is located above the grinding belt, and the outer side wall of the grinding wheel fits with the outer side wall of the grinding belt.

[0019] By adopting the above technical solution, some metal debris that falls off the parts will adhere to the grinding belt during the grinding process. By setting a grinding wheel to grind the outer surface of the grinding belt, the metal debris on the grinding belt can be removed, thereby preventing the metal debris on the grinding belt from scratching the surface of the parts during subsequent grinding.

[0020] Furthermore, the grinding wheel is installed on a pulley bracket on which an active grinding belt wheel is installed, and the active grinding belt wheel includes a driving wheel shaft rotatably installed on the pulley bracket and an active grinding belt wheel body sleeved on the driving wheel shaft and is non-rotatable. The pulley bracket on which the active grinding belt wheel is installed is also equipped with a grinding drive component, and the driving output end of the grinding drive component is transmission-connected with the active wheel shaft to drive the active wheel shaft to rotate. The grinding wheel includes a grinding wheel shaft rotatably installed on the pulley bracket and a grinding wheel body sleeved on the grinding wheel shaft and is non-rotatable. The grinding wheel shaft is transmission-connected with the active wheel shaft to drive the grinding wheel shaft to rotate when the active wheel shaft rotates.

[0021] By adopting the above technical solution, the grinding drive component can drive the active grinding belt wheel to rotate while also driving the grinding wheel to rotate. The active grinding belt wheel and the grinding wheel share a set of power input mechanism, which can save costs.

[0022] Furthermore, when the driving wheel shaft rotates, it drives the grinding belt to move from top to bottom around the driving grinding belt wheel toward the vertical bracket. The grinding wheel shaft and the driving wheel shaft have opposite directions of rotation. The linear speed of the contact position between the grinding wheel and the grinding belt is greater than the linear speed of the grinding belt.

[0023] By adopting the above technical solution, there is a speed difference between the grinding wheel and the grinding belt at the contact position, so friction will be generated between the two at the contact position. The grinding wheel can wipe off the metal debris stuck on the surface of the grinding belt, and the detached metal debris will fall onto the grinding belt again and be discharged after moving to the end of the grinding belt.

[0024] The grinding belt and the grinding belt wheel move in the same direction at the contact position and have a speed difference. Compared with making the two move in opposite directions at the contact position to form a speed difference, the speed difference between the two is relatively small, so that the friction between the grinding wheel and the grinding belt is relatively weak, avoiding wear of the grinding belt.

[0025] The beneficial effects of the adjustable grinding equipment provided by the present invention are: it can grind both the plane area in the part and the angular area in the part, and can be suitable for grinding angular areas of different shapes and sizes, has a wide range of applications, good grinding effect, and higher grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein: Figure 1 A schematic diagram of the structure of an adjustable grinding device from the front side perspective provided by the present invention; Figure 2 A schematic diagram of the structure of an adjustable grinding device from a rear side perspective provided by the present invention; Figure 3 A schematic diagram of the structure of a lifting and lowering adjustment component in an adjustable grinding device provided by the present invention; Figure 4 A schematic diagram of the structure of an adjustable grinding device provided by the present invention when viewed from the side; Figure 5 A schematic diagram of the structure of a movable part in an adjustable grinding device provided by the present invention; Figure 6 A schematic diagram of the structure of a mounting plate in an adjustable grinding device provided by the present invention.

[0027] Description of reference numerals: 1. Grinding belt; 2. Driven grinding belt wheel; 201. Driven wheel shaft; 202. Driven grinding belt wheel body; 3. Active grinding belt wheel; 301. Active wheel shaft; 302. Active grinding belt wheel body; 4. L-shaped plate; 401. Vertical support plate; 402. Horizontal support plate; 403. Vertical through hole; 5. First support plate; 6. Second support plate; 7. First connecting rod; 8. Second connecting rod; 9. Horizontal connecting rod; 10. Vertical handle rod; 11. Lifting drive member; 12. Transmission screw; 13. Movable member; 131. Middle horizontal plate; 132. End plug plate; 133. End support Plate; 14, shaft section; 15, screw handle; 16, first fixed axis; 17, second fixed axis; 18, driving gear; 19, driven gear; 20, grinding drive; 21, grinding wheel; 211, grinding wheel shaft; 212, grinding wheel body; 22, inclined support plate; 23, tensioning wheel; 24, vertical support rod; 25, horizontal support plate; 26, vertical guide rod; 27, elastic member; 28, adjustment block; 281, push inclined surface; 29, mounting base; 291, square through hole; 30, adjustment screw; 31, mounting plate; 311, matching hole; 312, push inclined surface. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] The following is one embodiment of an adjustable grinding device provided by the present invention: like Figure 1-Figure 6 As shown, an adjustable grinding device includes a frame, a driving grinding belt wheel 3, a driven grinding belt wheel 2, a grinding belt 1, a mounting body, a tensioning wheel set, a lifting and lowering adjustment component and a grinding wheel 21.

[0030] like Figure 1 , Figure 2 As shown, the frame includes a vertical support, a movable member 13, an articulated shaft, a wheel support and a connecting rod group.

[0031] like Figure 1 , Figure 2 As shown, the vertical bracket includes an L-shaped plate 4 and a connecting piece. The L-shaped plate 4 is symmetrically provided with two pieces front and back. The L-shaped plate 4 includes a horizontal support plate 402 and a vertical support plate 401 that are perpendicular to each other and integrally formed. The horizontal support plate 402 is located above the vertical support plate 401 and is connected to the side of the corresponding vertical support plate 401 that is away from the other L-shaped plate 4.

[0032] The vertical support plate 401 is provided with a vertical through hole 403 that penetrates front and back and extends in the up-down direction, and the bottom of the vertical support plate 401 is provided with a circular through hole that penetrates front and back, and the circular through hole is located directly below the vertical through hole 403. A lifting drive member 11 is fixedly mounted on each horizontal support plate 402, and the lifting drive member 11 adopts a motor, and the output shaft end of the motor is the driving output end of the lifting drive member 11, and the driving output end of the lifting drive member 11 is arranged downward.

[0033] The connecting member includes a transverse connecting rod 9 and a vertical handle rod 10 . The transverse connecting rod 9 extends along the front-to-back direction and is connected between two horizontal support plates 402 . The vertical handle rod 10 is vertically connected to the top of the transverse connecting rod 9 .

[0034] like Figure 1 , Figure 5 As shown, the movable member 13 includes a middle horizontal plate 131, an end plug plate 132 and an end support plate 133. The middle horizontal plate 131 is located between the two vertical support plates 401. There are two end plug plates 132. The two end plug plates 132 are connected to the front and rear ends of the middle horizontal plate 131 symmetrically in the front and rear direction, and are respectively adapted to be inserted in the vertical through holes 403 on the two vertical support plates 401, so that the movable member 13 can slide up and down along the vertical through holes 403 on the vertical support plates 401. There are two end support plates 133. The two end support plates 133 are arranged symmetrically in the front and rear direction and are respectively connected to the ends of the two end plug plates 132 that are away from each other. The outer diameter of the end support plate 133 in the left and right direction is greater than the outer diameter of the end plug plate 132 in the left and right direction, so that the front and rear position of the movable member 13 on the vertical bracket is fixed.

[0035] like Figure 2 , Figure 3 , Figure 4 As shown, each thread on the two end support plates 133 is equipped with a transmission screw 12 extending in the up-down direction. The transmission screw 12 is connected to the driving output end of the above-mentioned lifting drive member 11 through a coupling. When the lifting drive member 11 drives the transmission screw 12 to rotate, it can drive the movable member 13 to move up and down.

[0036] like Figure 3 As shown, the hinge shaft includes two shaft segments 14 that are symmetrical and spaced apart from each other, the axis of the shaft segment 14 extends in the front-to-back direction, and the shaft segment 14 is inserted into the circular through hole at the bottom of the vertical support plate 401 and fixed on the vertical support plate 401. One end of the shaft segment 14 facing away from the other shaft segment 14 is flush with the surface of the corresponding vertical support plate 401 facing away from the other vertical support plate 401, and one end of the shaft segment 14 facing the other shaft segment 14 protrudes from the corresponding vertical support plate 401 and extends between the two vertical support plates 401.

[0037] There are two pulley brackets, which are a first pulley bracket and a second pulley bracket arranged in sequence from left to right.

[0038] like Figure 4 As shown, the first pulley bracket includes two first support plates 5 spaced apart from each other and symmetrically arranged, and the right ends of the two first support plates 5 are rotatably mounted on the two shaft sections 14 respectively.

[0039] The second pulley bracket includes two second supporting plates 6 which are spaced apart from each other and symmetrically arranged. The left ends of the two second supporting plates 6 are rotatably mounted on the two shaft sections 14 respectively.

[0040] There are two connecting rod groups, namely a first connecting rod group and a second connecting rod group distributed from left to right. The first connecting rod group and the second connecting rod group are symmetrically arranged on the left and right sides of the movable part 13.

[0041] like Figure 1 As shown, the first link group includes two first links 7 that are spaced apart and symmetrically arranged front to back, and a first fixed shaft 16 that extends along the front to back direction and is connected between the tops of the two first links 7. The first fixed shaft 16 is rotatably mounted on the left end of the middle horizontal plate 131. The two first links 7 are disposed on the front and rear sides of the middle horizontal plate 131, and the bottoms of the two first links 7 are respectively hinged on the two first support plates 5 in the first pulley bracket.

[0042] The second connecting rod group includes two second connecting rods 8 that are spaced apart and symmetrically arranged in the front and rear directions, and a second fixed shaft 17 that extends along the front and rear directions and is connected between the tops of the two second connecting rods 8. The second fixed shaft 17 is rotatably installed on the right end of the middle horizontal plate 131. The two second connecting rods 8 are respectively arranged on the front and rear sides of the middle horizontal plate 131, and the bottoms of the two second connecting rods 8 are respectively hinged on the two second support plates 6 in the second pulley bracket.

[0043] When the movable part 13 is at the highest limit position, the first pulley bracket and the second pulley bracket are both kept in a horizontal state. When the movable part 13 moves downward, the first pulley bracket and the second pulley bracket are driven to swing downward around the hinge axis through the first connecting rod group and the second connecting rod group.

[0044] like Figure 4 As shown, the active grinding belt wheel 3 includes an active wheel shaft 301 and an active grinding belt wheel body 302 fixedly mounted on the active wheel shaft 301. The active wheel shaft 301 extends in the front-to-back direction. Both ends of the active wheel shaft 301 are respectively rotatably arranged on one end of two second support plates 6 in the second pulley bracket that are away from the hinge shaft. The active grinding belt wheel body 302 is located between the two second support plates 6. Figure 2As shown, a grinding drive member 20 is installed on the second support plate 6 located at the rear side. The grinding drive member 20 adopts a motor, and the output shaft end of the motor is the driving output end of the grinding drive member 20. The driving output end of the grinding drive member 20 is connected to the driving wheel shaft 301 through a coupling. The grinding drive member 20 is used to drive the driving wheel shaft 301 to rotate, thereby driving the driving belt wheel 3, the driven belt wheel 2 and the grinding belt 1 to rotate.

[0045] The driven grinding belt wheel 2 includes a driven wheel shaft 201 and a driven grinding belt wheel body 202 fixedly mounted on the driven wheel shaft 201. The driven wheel shaft 201 extends in the front-to-back direction. Both ends of the driven wheel shaft 201 are rotatably inserted into the two first support plates 5 in the first pulley bracket at one end facing away from the hinge shaft. The driven grinding belt wheel body 202 is located between the two first support plates 5.

[0046] like Figure 1 , Figure 2 As shown, the grinding belt 1 is sleeved on the outer sides of the driving grinding belt wheel 3 and the driven grinding belt wheel 2.

[0047] like Figure 3 , Figure 4 As shown, the mounting body includes a mounting base 29 and a mounting plate 31. The mounting base 29 is fixedly connected between the two shaft sections 14. The mounting base 29 is provided with two square through holes 291 arranged symmetrically in front and back. The square through holes 291 penetrate the mounting base 29 in the vertical direction. The mounting plate 31 is located above the mounting base 29. Figure 6 As shown, two matching holes 311 symmetrically distributed front to back are provided on the mounting plate 31. The two matching holes 311 correspond one to one with the two square through holes 291. The hole wall surface of the matching hole 311 close to the other matching hole 311 is a sliding slope 312. The two sliding slopes 312 in the two matching holes 311 approach each other from top to bottom.

[0048] like Figure 3 , Figure 4As shown, the tensioning wheel assembly includes two vertical support rods 24 arranged at intervals in front and back, a tensioning wheel 23 rotatably mounted between the tops of the two vertical support rods 24, and a horizontal support plate 25 connected between the two vertical support rods 24 and located below the tensioning wheel 23. The two vertical support rods 24 are slidably mounted on the above-mentioned mounting base 29 and mounting plate 31, and the bottom of the vertical support rods 24 is provided with a U-shaped groove with an opening facing downward. The bottom of the horizontal support plate 25 is vertically connected with three vertical guide rods 26 distributed at intervals in front and back, and the vertical guide rods 26 are slidably mounted on the above-mentioned mounting base 29 and mounting plate 31, and the bottom of the vertical guide rods 26 is also provided with a U-shaped groove with an opening facing downward. Three elastic members 27 are connected between the above-mentioned horizontal support plate 25 and the mounting plate 31, and the elastic members 27 are compression springs that can be extended and retracted in the up and down directions. The three elastic members 27 are respectively mounted on the outer sides of the three vertical guide rods 26. The elastic member 27 applies an upward elastic force to the horizontal support plate 25 , so that the horizontal support plate 25 drives the tensioning wheel 23 to be pressed against the top inner side wall of the grinding belt 1 .

[0049] like Figure 3 , Figure 4 As shown, the lifting adjustment assembly includes an adjustment block 28 and an adjustment screw 30 .

[0050] There are two adjusting blocks 28, which are arranged symmetrically in front and back and are respectively inserted into two square through holes 291 on the mounting base 29. The size of the adjusting block 28 in the front and back direction is smaller than the inner diameter size of the square through hole 291 in the front and back direction, so that the adjusting block 28 can move forward and backward in the square through hole 291. A push inclined surface 281 is provided on one side of the adjusting block 28 close to the other adjusting block 28, and the two push inclined surfaces 281 on the two adjusting blocks 28 approach each other from top to bottom. The top of the adjusting block 28 protrudes upward from the mounting base 29, and the tops of the two adjusting blocks 28 are respectively inserted into two matching holes 311 in the above-mentioned mounting plate 31, and the push inclined surface 281 in the adjusting block 28 fits with the push inclined surface 312 in the matching hole 311. Both adjusting blocks 28 are provided with threaded through holes extending forward and backward, and the threaded through holes in the two adjusting blocks 28 have opposite threaded directions.

[0051] The adjusting screw 30 extends in the front-back direction and is rotatably arranged on the above-mentioned mounting base 29. The adjusting screw 30 crosses the two square through holes 291 on the mounting base 29 and is also arranged in the U-shaped groove on the above-mentioned vertical guide rod 26 and the vertical support rod 24. The two adjusting blocks 28 are threadedly sleeved on the adjusting screw 30 through the threaded through holes. When the adjusting screw 30 rotates, it can drive the two adjusting blocks 28 to approach or move away from each other. When the two adjusting blocks 28 approach each other, the two pushing inclined surfaces 312 on the mounting plate 31 are pushed by the pushing inclined surfaces 281, driving the mounting plate 31 to move upward, thereby moving the elastic member 27 and the tensioning wheel group upward. When the two adjusting blocks 28 move away from each other, the two pushing inclined surfaces 281 also move away from each other, and the mounting plate 31 moves downward under the action of its own weight, thereby driving the elastic member 27 and the tensioning wheel group to move downward.

[0052] The front and rear ends of the adjusting screw 30 pass through the two shaft sections 14 and extend to the outside of the two shaft sections 14, and both ends of the adjusting screw 30 are connected to a screw handle 15. When in use, the adjusting screw 30 can be driven to rotate by holding the screw handle 15, thereby adjusting the distance between the two adjustment blocks 28.

[0053] like Figure 1 , Figure 2 , Figure 4 As shown, the grinding wheel 21 is installed on the second pulley bracket, and the ends of the two second support plates 6 in the above-mentioned second pulley bracket that are away from the hinge axis are connected with an inclined support plate 22. The grinding wheel 21 includes a grinding wheel shaft 211 and a grinding wheel body 212. The grinding wheel shaft 211 extends along the front and rear directions, and the front and rear ends of the grinding wheel shaft 211 are respectively rotatably passed through the two inclined support plates 22. The grinding wheel body 212 is fixedly mounted on the grinding wheel shaft 211, and the grinding wheel body 212 is located between the two inclined support plates 22.

[0054] The rear end of the grinding wheel shaft 211 extends to the rear side of the corresponding inclined support plate 22 and is coaxially fixed with the driven gear 19. The rear end of the driving wheel shaft 301 extends to the rear side of the corresponding second support plate 6 and is coaxially fixed with the driving gear 18. The driving gear 18 and the driven gear 19 are meshed with each other. The number of teeth of the driving gear 18 is greater than the number of teeth of the driven gear 19, so that the rotation speed of the grinding wheel shaft 211 is higher than the rotation speed of the driving wheel shaft 301. The outer diameter of the grinding wheel body 212 is equal to the outer diameter of the grinding belt 1 after it is wound on the driving belt wheel 3. Therefore, at the contact position between the grinding wheel 21 and the grinding belt 1, the grinding wheel 21 and the grinding belt 1 have the same moving direction, and the linear speed of the grinding wheel 21 is greater than the linear speed of the grinding belt 1. When the grinding drive 20 drives the driving wheel shaft 301 to rotate, the driving gear 18 is driven to rotate, and the driving gear 18 drives the driven gear 19 to rotate, thereby driving the grinding wheel 21 to rotate to grind the outer surface of the grinding belt 1 to remove metal particles adhered to the outer surface of the grinding belt 1.

[0055] During use of the present invention, when it is necessary to grind the flat area in the part, the movable part 13 can be moved to the highest limit position, at which time the first pulley bracket and the second pulley bracket are both in a horizontal state, at which time the distance between the active grinding belt wheel 3 and the driven grinding belt wheel 2 is the farthest, the grinding belt 1 is in a stretched and taut state, and the elastic part 27 is pressed by the grinding belt 1 in a minimum contraction state, at which time the grinding belt 1 will hardly be deformed when pressed, and the flat area of ​​the part can be polished by fitting the bottom surface of the grinding belt 1 to the flat area on the part.

[0056] When it is necessary to grind the angular area in the middle of the part, the lifting drive member 11 drives the transmission screw 12 to rotate, driving the movable member 13 to move downward, and the movable member 13 drives the first pulley bracket and the second pulley bracket to flip downward through the first connecting rod group and the second connecting rod group, and the active grinding belt wheel 3 and the driven grinding belt wheel 2 are close to each other, and the distance between the active grinding belt wheel 3 and the hinge shaft and the distance between the driven grinding belt wheel 2 and the hinge shaft are both fixed values, so the grinding belt 1 will become loose, and the elastic member 27 can restore a certain elastic deformation and stretch, so that the tensioning wheel 23 moves upward for a distance, and the active grinding belt wheel 3 and the driven grinding belt wheel 2 are close to each other. The active grinding belt wheel 3, the driven grinding belt wheel 2 and the tensioning wheel 23 can still support the grinding belt 1, so that the grinding belt 1 will not fall off the active grinding belt wheel 3 and the driven grinding belt wheel 2. Since the elastic member 27 is released to a certain extent at this time, the grinding belt 1 will become looser as a whole. At this time, the corner area of ​​the part to be polished is pressed on the grinding belt 1, and the grinding belt 1 can be deformed and concave inward, so as to fit in the outside of the corner area of ​​the part, and the outer wall of the grinding belt 1 is simultaneously fitted with multiple side surfaces in the corner area for forming the corners, so as to polish the corner area of ​​the part.

[0057] When it is necessary to grind a sharper angular area, the movable part 13 is continued to be driven downward, the elastic part 27 is released more, and the grinding belt 1 becomes relatively looser, so it can produce more deformation when pressed, and when pressed by a sharper angular area, the angular area can be wrapped and covered for grinding.

[0058] After the sanding belt 1 has been used for a long time, the sanding belt 1 will be deformed due to long-term pressure, and the diameter of the sanding belt 1 will increase. When the diameter of the sanding belt 1 increases to the point where the elastic member 27 is completely released and still cannot support the sanding belt 1, the screw handle 15 can be held and screwed to drive the adjusting screw 30 to rotate. When the adjusting screw 30 rotates, the two adjusting blocks 28 are driven closer to each other, thereby driving the mounting plate 31 to move upward. The mounting plate 31 drives the elastic member 27 and the tensioning wheel 23 to move upward to support the sanding belt 1 and prevent the loosened sanding belt 1 from falling off.

[0059] The present invention can grind the angular regions of parts, and can be applied to grinding angular regions at different angles, has a wide application range, and has a better grinding effect on the angular regions and a higher grinding efficiency.

[0060] In this embodiment, a grinding wheel 21 is installed on the second pulley bracket. In other embodiments, the grinding wheel 21 may not be installed on the second pulley bracket, and in this case, the inclined support plate 22 is not provided on the second support plate 6 in the second pulley bracket.

[0061] In this embodiment, the lifting drive member 11 adopts a motor, and a transmission screw 12 extending up and down is threaded on the movable member 13. The output shaft end of the motor is connected to the transmission screw 12 through a coupling, thereby realizing the transmission connection between the lifting drive member 11 and the movable member 13. In other embodiments, the lifting drive member 11 adopts a lifting cylinder, and the piston rod end of the lifting cylinder is directly fixed to the movable member 13, thereby realizing the transmission connection between the lifting drive member 11 and the movable member 13.

[0062] In this embodiment, the lifting and adjusting assembly includes an adjusting screw 30 and an adjusting block 28. The adjusting screw 30 is rotated to drive the adjusting block 28 to move forward and backward, thereby driving the mounting plate 31 to move up and down. In other embodiments, the lifting and adjusting assembly includes a rotating shaft, a rotating gear and a moving rack. The rotating shaft is rotatably penetrated on the mounting base 29, and the rotating gear is fixedly sleeved on the outer side of the rotating shaft. The moving rack extends in the up and down direction and is connected to the mounting plate 31. The moving rack and the rotating gear are meshed with each other. When the rotating shaft rotates, the rotating gear is driven to rotate, and the rotating gear drives the moving rack to move up and down, thereby driving the mounting plate 31 to move up and down.

Claims

1. An adjustable grinding device, comprising a frame, on which a driving abrasive belt wheel and a driven abrasive belt wheel with rotation axes extending in the front-back direction are rotatably mounted, the driving abrasive belt wheel and the driven abrasive belt wheel are spaced apart on the left and right sides of the frame, and a grinding belt is sheathed on the outer sides of the driving abrasive belt wheel and the driven abrasive belt wheel, characterized in that: The frame includes a vertical bracket, a hinge shaft with an axis extending forward and backward and fixedly connected to the bottom of the vertical bracket, two pulley brackets arranged on the left and right sides of the hinge shaft and one end close to the hinge shaft is rotatably sleeved on the hinge shaft, a movable member guided and slidably assembled on the vertical bracket, and two groups of connecting rods symmetrically arranged on the left and right sides of the movable member, and the two ends of the connecting rod group are respectively hinged to the movable member and the pulley bracket on the corresponding side; The driving grinding belt wheel and the driven grinding belt wheel are respectively installed on the two pulley brackets, and are both located at one end of the corresponding pulley bracket facing away from the hinge shaft. A lifting driving member is installed on the vertical bracket, and the lifting driving member is transmission-connected with the movable member to drive the movable member to reciprocate up and down. When the movable member moves downward, the two pulley brackets are driven to swing downward around the hinge shaft through two sets of connecting rods. The hinge shaft is connected to a mounting body, on which a tensioning wheel group capable of moving up and down is provided, and an elastic member is connected between the tensioning wheel group and the mounting body, which applies an upward elastic force to the tensioning wheel group so that the tensioning wheel group is pressed against the top inner wall of the grinding belt.

2. The adjustable grinding device according to claim 1, characterized in that: The tensioning wheel assembly includes two vertical support rods arranged at intervals in front and back, a tensioning wheel rotatably installed between the tops of the two vertical support rods, and a horizontal support plate connected between the two vertical support rods and located below the tensioning wheel. The two vertical support rods are guided and slidably installed on the installation body in the up and down directions, the horizontal support plate is located above the installation body, and the elastic member is connected between the horizontal support plate and the installation body.

3. The adjustable grinding device according to claim 2, characterized in that: The mounting body includes a mounting base fixedly connected to the hinge shaft and a mounting plate movable up and down and arranged above the mounting base. The elastic member is connected between the horizontal support plate and the mounting plate. A lifting and adjusting component is provided on the mounting base, and the lifting and adjusting component cooperates with the mounting plate to adjust the height position of the mounting plate.

4. The adjustable grinding device according to claim 3, characterized in that: The lifting and lowering adjustment assembly includes an adjusting block and an adjusting screw. The adjusting block is guided and slidably assembled on the mounting base along the front-back direction. The adjusting screw extends along the front-back direction and is rotatably mounted on the mounting base. The adjusting screw cooperates with the adjusting block in spiral transmission. The adjusting block is provided with a pushing inclined surface, and the mounting plate is provided with a sliding inclined surface that cooperates with the pushing inclined surface. When the adjusting screw rotates, it drives the adjusting block to move along the front-back direction. The adjusting block pushes the sliding inclined surface on the mounting plate through the pushing inclined surface, thereby driving the mounting plate to move up and down.

5. The adjustable grinding device according to claim 4, characterized in that: At least one end of the adjusting screw rod extends to the outside of the grinding belt along the front-back direction, and the end of the adjusting screw rod extending to the outside of the grinding belt is connected with a screwing handle.

6. An adjustable grinding device according to any one of claims 1-5, characterized in that: The movable part is threaded with a transmission screw extending in the up and down directions. The lifting drive part has a driving output end that can rotate around a vertical axis. The driving output end of the lifting drive part is transmission-connected to the transmission screw. The lifting drive part is used to drive the transmission screw to rotate, so as to drive the movable part to move up and down.

7. An adjustable grinding device according to any one of claims 1-5, characterized in that: A grinding wheel with a rotation axis extending in the front-rear direction is rotatably mounted on at least one pulley bracket. The grinding wheel is located above the grinding belt, and the outer side wall of the grinding wheel fits with the outer side wall of the grinding belt.

8. The adjustable grinding device according to claim 7, characterized in that: The grinding wheel is installed on a pulley bracket on which an active grinding belt wheel is installed, and the active grinding belt wheel includes a driving wheel shaft rotatably installed on the pulley bracket and an active grinding belt wheel main body sleeved on the driving wheel shaft and locked in rotation. The pulley bracket on which the active grinding belt wheel is installed is also equipped with a grinding drive component, and a driving output end of the grinding drive component is transmission-connected with the active wheel shaft to drive the active wheel shaft to rotate. The grinding wheel includes a grinding wheel shaft rotatably installed on the pulley bracket and a grinding wheel main body sleeved on the grinding wheel shaft and locked in rotation. The grinding wheel shaft is transmission-connected with the active wheel shaft to drive the grinding wheel shaft to rotate when the active wheel shaft rotates.

9. The adjustable grinding device according to claim 8, characterized in that: When the driving wheel shaft rotates, it drives the grinding belt to move from top to bottom around the driving grinding belt wheel toward the vertical bracket. The grinding wheel shaft and the driving wheel shaft have opposite rotation directions. The linear speed of the contact position between the grinding wheel and the grinding belt is greater than the linear speed of the grinding belt.

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