Workpiece surface grinding device

Abstract

The present invention relates to the field of grinding technology, and specifically to a workpiece surface grinding device, which includes a machine base, a driven wheel, a driving wheel, an adjustment mechanism and a grinding belt. The driven wheel and the driving wheel are arranged on the machine base in parallel with each other and can rotate. The driving wheel has an annular bladder, a base tube and a sliding tube. The sliding tube is coaxially sleeved on the base tube. The annular bladder is simultaneously sealed and sleeved on the outer peripheral wall of the base tube and the sliding tube, and the inside of the annular bladder is filled with fluid. The sliding tube can slide along its own axial direction to change the diameter of the annular bladder. The adjustment mechanism is configured to adjust the position of the sliding tube on the base tube. The grinding belt is frictionally sleeved on the driven wheel and the annular bladder at the same time, so that the tension of the grinding belt can be adaptively changed when the diameter of the annular bladder changes. This avoids the use of a pressing block to press the grinding belt against the workpiece, and reduces the wear of the grinding belt while reducing the heat generation of the grinding belt.

Description

Technical Field

[0001] The invention relates to the technical field of grinding, and in particular to a workpiece surface grinding device. Background Art

[0002] A belt sander is a mechanical device used for finishing the surface of a workpiece. Its working principle is to use an electric motor to drive the sanding belt to perform grinding operations on the surface of the workpiece to complete processes such as polishing, cutting and wire drawing. It has the characteristics of high efficiency, high precision, low cost, safety and flexibility, and is suitable for grinding various materials and surfaces.

[0003] In the related technology, for example, Chinese patent CN213945964U discloses a lifting system for a pressure grinding device. When the lifting system for the pressure grinding device is in use, the pressure block device applies outward pressure to the grinding belt to press the grinding workpiece tightly against the conveyor belt, which is convenient for grinding burrs on the grinding workpiece and prevents the grinding belt from being too loose to affect the grinding effect.

[0004] Although the lifting system of the above-mentioned pressure grinding device can improve the grinding effect of the grinding workpiece to a certain extent, it is found in the actual grinding process that the pressure block device not only aggravates the wear of the grinding belt, thereby affecting the service life of the grinding belt, but also causes the grinding belt to heat up seriously, which makes the grinding belt easy to expand and deform, resulting in poor contact between the grinding belt and the grinding workpiece, affecting the grinding efficiency. Summary of the invention

[0005] Based on this, it is necessary to provide a workpiece surface grinding device to address the problems of low grinding efficiency and high frequency of grinding belt replacement in the process of grinding workpieces in the current belt grinding machine.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A workpiece surface grinding device, the workpiece surface grinding device comprising:

[0008] Machine base;

[0009] A driven wheel, the driven wheel is arranged on the machine base and can rotate on its own;

[0010] A driving wheel, the driving wheel is arranged on the machine base, parallel to the axis of the driven wheel, and can rotate on its own; the driving wheel has an annular fetal sac, a base cylinder and a sliding cylinder, the sliding cylinder is coaxially sleeved on the base cylinder, the annular fetal sac is simultaneously sealed and sleeved on the outer peripheral walls of the base cylinder and the sliding cylinder, and the annular fetal sac is filled with fluid, and the sliding cylinder can slide along its own axis direction to change the diameter of the annular fetal sac;

[0011] an adjustment mechanism, the adjustment mechanism being configured to be able to adjust the position of the sliding cylinder on the base cylinder;

[0012] A grinding belt, wherein the grinding belt is frictionally sleeved on the driven wheel and the annular fetal sac at the same time, so that the tension of the grinding belt can be adaptively changed when the diameter of the annular fetal sac changes;

[0013] A driving member is configured to provide a driving force for the self-rotation of the driving wheel.

[0014] Furthermore, the adjustment mechanism includes an adjustment ring, an adjustment column and an elastic member, the adjustment ring is coaxially and fixedly inserted inside the base cylinder, and an adjustment groove is provided on the circumferential side wall of the adjustment ring; the adjustment column is slidably inserted in the adjustment ring, and a sliding protrusion is fixedly provided on the circumferential side wall of the adjustment column, and the sliding protrusion is slidably inserted in the adjustment groove; the elastic member is connected between the adjustment column and the sliding cylinder, and under the action of the elastic member, the adjustment column and the sliding cylinder have a tendency to approach each other.

[0015] Further, the adjustment groove has a first straight groove, a second straight groove and a plurality of oblique grooves, the first straight groove and the second straight groove both extend in a direction parallel to the axis of the adjustment ring, and both ends of the first straight groove and the second straight groove are connected; the plurality of oblique grooves are arranged at equal intervals in a direction parallel to the axis of the adjustment ring, and are all connected to the second straight groove, and from bottom to top, the oblique grooves are inclined toward the side close to the base cylinder; the adjustment mechanism also includes a first moving member and a second moving member, the first moving member is configured to be able to drive the sliding protrusion to move from the end of the second straight groove close to one side of the base cylinder to the first straight groove; the second moving member is configured to be able to drive the sliding protrusion to move from the end of the first straight groove close to one end of the sliding cylinder to the second straight groove.

[0016] Furthermore, the first moving member comprises a magnetic block, which is fixedly arranged at the end of the first straight groove close to the base cylinder and is magnetically connected to the sliding protrusion.

[0017] Furthermore, the second moving member includes a torsion spring.

[0018] Furthermore, the elastic member includes a tension spring.

[0019] Furthermore, a plurality of grooves are arranged on the outer peripheral wall of the annular fetal sac, and the extending direction of the grooves is arranged parallel to the axis of the annular fetal sac.

[0020] Furthermore, a friction rod is parallelly and fixedly inserted in each of the grooves.

[0021] Furthermore, a plurality of strip-shaped protrusions are arranged on the inner belt surface of the grinding belt, and the strip-shaped protrusions extend along the belt width direction of the grinding belt and can be engaged with the grooves.

[0022] The beneficial effects of the present invention are:

[0023] When using a workpiece surface grinding device provided by the present invention, the grinding belt is firstly sleeved on the outside of the driving wheel and the driven wheel at the same time, and then the position of the sliding cylinder on the base cylinder is adjusted by the adjustment mechanism so that the annular bladder has a suitable diameter to facilitate the tensioning of the grinding belt; then the driving wheel is driven to rotate; during the rotation of the driving wheel, the driving wheel drives the driven wheel to rotate through the grinding belt to grind the workpiece. On the one hand, the setting of the annular bladder can adapt to the special-shaped grinding surface, which is conducive to improving the versatility of the grinding device. On the other hand, the pressure block is omitted, which can reduce the wear and heat of the grinding belt while simplifying the structure. While increasing the service life of the grinding belt, it can ensure good contact between the grinding belt and the workpiece, thereby improving the grinding efficiency.

[0024] Furthermore, by arranging an adjustment mechanism including an elastic member, during use, when the contact pressure between the grinding belt and the workpiece increases, the annular fetal sac is compressed so that the sliding cylinder moves away from the base cylinder, and while the elastic member accumulates force, the curvature of the annular fetal sac becomes smaller and the contact area with the grinding belt increases, thereby further reducing slippage; when the contact pressure between the grinding belt and the workpiece decreases, the sliding cylinder can move toward the base cylinder under the action of the elastic member, thereby increasing the curvature of the annular fetal sac and reducing the contact area with the grinding belt, thereby reducing the wear of the grinding belt and extending the service life of the grinding belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the three-dimensional structure of a workpiece surface grinding device provided by an embodiment of the present invention;

[0026] Figure 2 A schematic front view of the structure of a workpiece surface grinding device provided by an embodiment of the present invention;

[0027] Figure 3 for Figure 2 Middle AA section view;

[0028] Figure 4 for Figure 3 A schematic diagram of the partially enlarged structure at B in the middle;

[0029] Figure 5 for Figure 2 Middle CC section view;

[0030] Figure 6 for Figure 5The schematic diagram of the local enlarged structure at D in the middle;

[0031] Figure 7 A schematic side view of a workpiece surface grinding device provided in one embodiment of the present invention;

[0032] Figure 8 for Figure 7 Middle EE section view;

[0033] Fig. 9 for Figure 8 The schematic diagram of the partial enlarged structure at F in the middle;

[0034] Fig.10 A schematic diagram of the three-dimensional structure of a driving wheel of a workpiece surface grinding device provided in one embodiment of the present invention;

[0035] Fig.11 for Fig.10 Middle GG section view;

[0036] Fig.12 for Fig.11 Schematic diagram of the local enlarged structure at H in the middle.

[0037] in:

[0038] 1. Machine base; 11. Bracket;

[0039] 2. Driven wheel;

[0040] 3. driving wheel; 31. base cylinder; 311. slide groove; 32. sliding cylinder; 321. slider; 33. annular fetal sac; 331. groove; 34. adjusting ring; 341. adjusting groove; 3411. first straight dividing groove; 3412. second straight dividing groove; 3413. oblique dividing groove; 35. adjusting column; 351. sliding convex; 36. tension spring; 37. magnetic block; 38. friction rod;

[0041] 4. Grinding belt;

[0042] 5. Drive motor. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] like Figures 1 to 12 As shown, a workpiece surface grinding device provided by an embodiment of the present invention is used for grinding workpieces, and is configured to include a machine base 1, a driven wheel 2, a driving wheel 3, an adjustment mechanism and a grinding belt 4, wherein the driven wheel 2 is arranged on the machine base 1 and can rotate; the driving wheel 3 is arranged on the machine base 1, and is parallel to the axis of the driven wheel 2, and can rotate; the driving wheel 3 has an annular cyst 33, a base cylinder 31 and a sliding cylinder 32, the sliding cylinder 32 is coaxially sleeved on the base cylinder 31, the annular cyst 33 is simultaneously sealed and sleeved on the outer peripheral walls of the base cylinder 31 and the sliding cylinder 32, and the inside of the annular cyst 33 is filled with fluid, and the sliding cylinder 32 can slide along its own axial direction to change the diameter of the annular cyst 33; the adjustment mechanism is configured to be able to adjust the position of the sliding cylinder 32 on the base cylinder 31; the grinding belt 4 is frictionally sleeved on the driven wheel 2 and the annular cyst 33 at the same time, so that the tension of the grinding belt 4 can be adaptively changed when the diameter of the annular cyst 33 changes.

[0047] Specifically in this embodiment, Figure 2 As shown, the driven wheel 2 and the driving wheel 3 are both horizontally arranged on the machine base 1; to facilitate the installation of the driven wheel 2, a bracket 11 is vertically connected to the top of the machine base 1, and the driven wheel 2 is arranged to be rotatably installed on the bracket 11 during installation.

[0048] like Fig. 9As shown, the base cylinder 31 is configured as a cylindrical structure with an open right end, and the sliding cylinder 32 is configured as a cylindrical structure with an open left end. In order to facilitate the sliding connection between the base cylinder 31 and the sliding cylinder 32, as shown in FIG. Fig.11 As shown, a plurality of slide grooves 311 are arranged on the inner circumferential wall of the base cylinder 31, and the slide grooves 311 extend in a direction parallel to the axis of the base cylinder 31. The plurality of slide grooves 311 are evenly arranged in the circumferential direction. A number of sliders 321 equal to the number of the slide grooves 311 are fixedly arranged on the inner circumferential wall of the sliding cylinder 32. The sliders 321 are arranged in a rectangular structure and extend in a direction parallel to the axis of the sliding cylinder 32. The plurality of sliders 321 are evenly arranged in the circumferential direction, and are slidably inserted into the slide grooves 311 one by one when in use, so that the sliding cylinder 32 can slide in its own axial direction.

[0049] like Fig. 9 As shown, the cross-sectional shape of the annular fetal sac 33 is set to be U-shaped, and when installed, the left side is set to be vertical and fixedly inserted in the left end face of the base cylinder 31, and the right side is set to be vertical and fixedly inserted in the right end face of the sliding cylinder 32; when the sliding cylinder 32 moves in the direction away from the base cylinder 31, the diameter and curvature of the annular fetal sac 33 decrease, and when the sliding cylinder 32 moves in the direction close to the base cylinder 31, the diameter and curvature of the annular fetal sac 33 increase.

[0050] During use, the grinding belt 4 is firstly sleeved on the outside of the driving wheel 3 and the driven wheel 2 at the same time, and then the position of the sliding cylinder 32 on the base cylinder 31 is adjusted by the adjustment mechanism so that the annular fetal sac 33 has a suitable diameter to facilitate the tensioning of the grinding belt 4; then the driving wheel 3 is driven to rotate; during the rotation of the driving wheel 3, the driving wheel 3 drives the driven wheel 2 to rotate through the grinding belt 4 to grind the workpiece. The setting of the annular fetal sac 33 can adapt to the special-shaped grinding surface on the one hand, which is conducive to improving the versatility of the grinding device, and on the other hand, it eliminates the pressing block, which can reduce the wear and heat of the grinding belt 4 while simplifying the structure, and can ensure good contact between the grinding belt 4 and the workpiece while increasing the service life of the grinding belt 4, thereby improving the grinding efficiency.

[0051] In some embodiments, the adjustment mechanism is configured to include an adjustment ring 34, an adjustment column 35 and an elastic member. The adjustment ring 34 is coaxially and fixedly inserted inside the base cylinder 31, and an adjustment groove 341 is opened on the circumferential side wall of the adjustment ring 34; the adjustment column 35 is slidably inserted in the adjustment ring 34, and a sliding protrusion 351 is fixedly provided on the circumferential side wall of the adjustment column 35, and the sliding protrusion 351 is slidably inserted in the adjustment groove 341; the elastic member is connected between the adjustment column 35 and the sliding cylinder 32, and under the action of the elastic member, the adjustment column 35 and the sliding cylinder 32 have a tendency to approach each other.

[0052] Specifically in this embodiment, Fig. 9 and Fig.11As shown, the adjustment ring 34 is arranged to be installed with its left end vertically connected to the inner end surface of the left end of the base tube 31, and its right end is suspended; the adjustment column 35 is arranged to be a T-shaped structure, and its small end is inserted into the inside of the adjustment ring 34, and its large end is located outside the adjustment ring 34; Figure 6 As shown, the sliding protrusion 351 is configured as a columnar structure, and the axis thereof is configured perpendicular to the axis of the adjusting column 35 .

[0053] During use, when the grinding surface of the workpiece is a special-shaped surface, the contact pressure between the grinding belt 4 and the workpiece will change; when the contact pressure between the grinding belt 4 and the workpiece increases, the annular fetal sac 33 is compressed so that the sliding cylinder 32 moves away from the base cylinder 31, and while the elastic member accumulates force, the curvature of the annular fetal sac 33 becomes smaller and the contact area with the grinding belt 4 increases, thereby further reducing slippage; when the contact pressure between the grinding belt 4 and the workpiece decreases, the sliding cylinder 32 can move toward the base cylinder 31 under the action of the elastic member, thereby increasing the curvature of the annular fetal sac 33 and reducing the contact area with the grinding belt 4, thereby reducing the wear of the grinding belt 4 and extending the service life of the grinding belt 4.

[0054] In a further embodiment, the adjustment groove 341 is configured to have a first straight groove 3411, a second straight groove 3412 and a plurality of oblique grooves 3413, the first straight groove 3411 and the second straight groove 3412 both extend in a direction parallel to the axis of the adjustment ring 34, and both ends of the first straight groove 3411 and the second straight groove 3412 are connected; the plurality of oblique grooves 3413 are arranged at equal intervals in a direction parallel to the axis of the adjustment ring 34, and are all connected to the second straight groove 3412, and from bottom to top, the oblique grooves 3413 are inclined toward a side close to the base cylinder 31; the adjustment mechanism is configured to also include a first moving member and a second moving member, the first moving member is configured to be able to drive the sliding protrusion 351 to move from the end of the second straight groove 3412 close to one side of the base cylinder 31 to the first straight groove 3411; the second moving member is configured to be able to drive the sliding protrusion 351 to move from the end of the first straight groove 3411 close to one end of the sliding cylinder 32 to the second straight groove 3412.

[0055] Specifically in this embodiment, Fig.12 As shown, the first straight groove 3411, the second straight groove 3412 and the oblique groove 3413 are all arranged through the circumferential side wall of the adjustment ring 34, and the first straight groove 3411 is located above the second straight groove 3412; the oblique groove 3413 is arranged to extend obliquely along the upper left direction, and the number can be five, and the five oblique grooves 3413 are arranged at equal intervals.

[0056] During normal use, the adjustment column 35 tends to move to the right under the action of the elastic member. Since the sliding protrusion 351 is located at the bottom of the oblique groove 3413 and the oblique groove 3413 extends in the upper left direction, the sliding protrusion 351 can be locked in the oblique groove 3413 under the action of the elastic member.

[0057] like Fig.11 and Fig.12 As shown, when the grinding belt 4 needs to be replaced, the sliding cylinder 32 is first manually pressed to the left, and the sliding cylinder 32 synchronously drives the adjusting column 35 to move to the left through the elastic member. Under the guiding action of the oblique groove 3413, the adjusting column 35 rotates while moving to the left, so that the sliding protrusion 351 moves from the oblique groove 3413 to the second straight groove 3412; as the sliding cylinder 32 continues to move, the sliding protrusion 351 moves along the second straight groove 3412 to the left end of the second straight groove 3412 under the push of the elastic member. At this time, the adjusting column 35 rotates under the drive of the first moving member, so that the sliding protrusion 351 moves from the second straight groove 3412 to the first straight groove 3 411; then release or pull the sliding cylinder 32 to the right, and the sliding cylinder 32 moves to the right under the hydraulic action of the fluid or the external force, and the sliding cylinder 32 synchronously drives the adjusting column 35 to move to the right through the elastic member, so that the sliding protrusion 351 moves along the first straight dividing groove 3411 to the right end of the first straight dividing groove 3411, and at this time, the adjusting column 35 rotates under the drive of the second moving member, so that the sliding protrusion 351 moves from the first straight dividing groove 3411 to the second straight dividing groove 3412; at this time, the sliding cylinder 32 is located away from the base cylinder 31, so that the diameter of the annular fetal sac 33 is reduced, and the tensioning effect on the grinding belt 4 is reduced, thereby facilitating the replacement of the grinding belt 4.

[0058] In a further embodiment, the first moving member is configured to include a magnetic block 37 , which is fixedly disposed at an end of the first bisecting groove 3411 close to the base cylinder 31 and is magnetically connected to the sliding protrusion 351 .

[0059] Specifically in this embodiment, Fig.12 As shown, the magnetic block 37 is arranged on the top wall surface of the left end of the first bisecting groove 3411.

[0060] During use, when the sliding protrusion 351 moves to the left end of the second straight groove 3412 , the sliding protrusion 351 moves toward the direction close to the magnetic block 37 under the effect of magnetism, so as to move from the second straight groove 3412 to the first straight groove 3411 .

[0061] In other embodiments, the second moving member is configured to include a torsion spring.

[0062] Specifically in this embodiment, the torsion spring is connected between the adjustment column 35 and the adjustment ring 34 .

[0063] During use, when the adjusting column 35 rotates under the guidance of the oblique groove 3413, the torsion spring accumulates force; when the sliding protrusion 351 moves from the second straight groove 3412 to the first straight groove 3411 under the attraction of the magnetic block 37, the torsion spring further accumulates force; when the sliding protrusion 351 moves to the right end of the first straight groove 3411, the torsion spring is partially released and drives the sliding protrusion 351 to move from the first straight groove 3411 to the second straight groove 3412; when tensioning the grinding belt 4, the sliding cylinder 32 is manually pressed to the left, and the sliding cylinder 32 synchronously drives the adjusting column 35 to move to the left through the elastic member. When the annular fetal sac 33 expands to a suitable diameter, the sliding cylinder 32 is released, and the torsion spring is released so that the sliding protrusion 351 is stuck in the corresponding oblique groove 3413.

[0064] In other embodiments, the elastic member is configured to include a tension spring 36 .

[0065] Specifically in this embodiment, Fig. 9 As shown, the tension spring 36 is horizontally arranged between the adjustment column 35 and the sliding cylinder 32, and the left end is fixedly connected to the right end of the adjustment column 35, and the right end is fixedly connected to the inner wall of the right end of the sliding cylinder 32. Under the action of the tension spring 36, the adjustment column 35 and the sliding cylinder 32 tend to approach each other.

[0066] In other embodiments, Fig.11 As shown, a plurality of grooves 331 are arranged on the outer peripheral wall of the annular fetal sac 33 , and the extending direction of the grooves 331 is arranged parallel to the axis of the annular fetal sac 33 .

[0067] When in use, the arrangement of the groove 331 allows the grinding belt 4 to be subjected to more uniform force during operation, thereby reducing local stress concentration on the grinding belt 4 and helping to extend the service life of the grinding belt 4 and reduce replacement frequency and maintenance costs.

[0068] In a further embodiment, a friction rod 38 is parallelly and fixedly inserted in each groove 331, so that when in use, the friction rod 38 can increase the contact pressure between the annular fetal sac 33 and the grinding belt 4 to avoid slipping between the grinding belt 4 and the annular fetal sac 33.

[0069] In other embodiments, a plurality of strip-shaped protrusions are provided on the inner surface of the grinding belt 4, which extend along the width direction of the grinding belt 4 and can be engaged with the groove 331 to avoid slipping between the grinding belt 4 and the annular fetal sac 33 during use.

[0070] In some other embodiments, the workpiece surface grinding device is configured to further include a driving member, and the driving member is configured to provide a driving force for the driving wheel 3 to rotate.

[0071] Specifically in this embodiment, the driving member is configured to include a driving motor 5, such as Figure 2As shown, the drive motor 5 is arranged to be fixedly connected to the top of the machine base 1 by bolts during installation, and the motor shaft of the drive motor 5 is arranged horizontally to the right and is coaxially and fixedly inserted on the left end surface of the base cylinder 31.

[0072] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows:

[0073] During normal use, the adjustment column 35 tends to move to the right under the action of the tension spring 36. Since the sliding protrusion 351 is located at the bottom of the oblique groove 3413 at this time, and the oblique groove 3413 extends in the upper left direction, the sliding protrusion 351 can be locked in the oblique groove 3413 under the action of the tension spring 36.

[0074] During grinding, the driving motor 5 is started, and the driving motor 5 drives the active wheel 3 to rotate, and the active wheel 3 drives the driven wheel 2 to rotate through the grinding belt 4 to grind the workpiece; when the grinding surface of the workpiece is a special-shaped surface, the contact pressure between the grinding belt 4 and the workpiece will change; when the contact pressure between the grinding belt 4 and the workpiece increases, the annular fetal sac 33 is compressed so that the sliding cylinder 32 moves away from the base cylinder 31, and while the tension spring 36 accumulates force, the curvature of the annular fetal sac 33 becomes smaller and the contact area with the grinding belt 4 increases, thereby further reducing slippage; when the contact pressure between the grinding belt 4 and the workpiece decreases, the sliding cylinder 32 can move toward the base cylinder 31 under the action of the tension spring 36, thereby increasing the curvature of the annular fetal sac 33 and reducing the contact area with the grinding belt 4, thereby reducing the wear of the grinding belt 4 and extending the service life of the grinding belt 4.

[0075] When the grinding belt 4 needs to be replaced, the sliding cylinder 32 is first manually pressed to the left, and the sliding cylinder 32 synchronously drives the adjusting column 35 to move to the left through the tension spring 36. Under the guidance of the oblique groove 3413, the adjusting column 35 moves to the left while rotating, which makes the torsion spring accumulate force on the one hand, and makes the sliding protrusion 351 move from the oblique groove 3413 to the second straight groove 3412 on the other hand; as the sliding cylinder 32 continues to move, the sliding protrusion 351 moves along the second straight groove 3412 to the left end of the second straight groove 3412. At this time, under the action of magnetism, the sliding protrusion 351 moves in the direction close to the magnetic block 37 to move from the second straight groove 3412 to the first straight groove 3411, and the torsion spring further accumulates force; Then release or pull the sliding cylinder 32 to the right. Under the hydraulic action of the fluid or the external force, the sliding cylinder 32 moves to the right. The sliding cylinder 32 synchronously drives the adjusting column 35 to move to the right through the tension spring 36, so that the sliding protrusion 351 moves along the first straight dividing groove 3411 to the right end of the first straight dividing groove 3411. When the sliding protrusion 351 moves to the right end of the first straight dividing groove 3411, the torsion spring part is released and drives the sliding protrusion 351 from the first straight dividing groove 3411 to the second straight dividing groove 3412; at this time, the tension spring 36 is in its original length state, the sliding cylinder 32 is located away from the base cylinder 31, the diameter of the annular fetal sac 33 is reduced, and the tensioning effect on the grinding belt 4 is reduced, thereby facilitating the replacement of the grinding belt 4.

[0076] When the grinding belt 4 is tensioned, the sliding cylinder 32 is manually pressed to the left, and the sliding cylinder 32 synchronously drives the adjusting column 35 to move to the left through the tension spring 36. When the annular fetal sac 33 expands to a suitable diameter, the sliding cylinder 32 is released, and the torsion spring is released so that the sliding protrusion 351 is stuck in the corresponding oblique groove 3413.

[0077] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A workpiece surface grinding device, characterized in that: The workpiece surface grinding device comprises: Machine base; A driven wheel, the driven wheel is arranged on the machine base and can rotate on its own; A driving wheel, the driving wheel is arranged on the machine base, parallel to the axis of the driven wheel, and can rotate on its own; the driving wheel has an annular fetal sac, a base cylinder and a sliding cylinder, the sliding cylinder is coaxially sleeved on the base cylinder, the annular fetal sac is simultaneously sealed and sleeved on the outer peripheral walls of the base cylinder and the sliding cylinder, and the annular fetal sac is filled with fluid, and the sliding cylinder can slide along its own axis direction to change the diameter of the annular fetal sac; an adjustment mechanism, the adjustment mechanism being configured to be able to adjust the position of the sliding cylinder on the base cylinder; A grinding belt, wherein the grinding belt is frictionally sleeved on the driven wheel and the annular fetal sac at the same time, so that the tension of the grinding belt can be adaptively changed when the diameter of the annular fetal sac changes; A driving member, wherein the driving member is configured to provide a driving force for the driving wheel to rotate; The adjustment mechanism comprises an adjustment ring, an adjustment column and an elastic member. The adjustment ring is coaxially and fixedly inserted in the base cylinder, and an adjustment groove is provided on the circumferential side wall of the adjustment ring; the adjustment column is slidably inserted in the adjustment ring, and a sliding protrusion is fixedly provided on the circumferential side wall of the adjustment column, and the sliding protrusion is slidably inserted in the adjustment groove; the elastic member is connected between the adjustment column and the sliding cylinder, and under the action of the elastic member, the adjustment column and the sliding cylinder have a tendency to approach each other; The adjustment groove comprises a first straight groove, a second straight groove and a plurality of oblique grooves, the first straight groove and the second straight groove both extend in a direction parallel to the axis of the adjustment ring, and both ends of the first straight groove and the second straight groove are connected; the plurality of oblique grooves are arranged at equal intervals in a direction parallel to the axis of the adjustment ring, and are all connected to the second straight groove, and from bottom to top, the oblique grooves are inclined toward the side close to the base cylinder; the adjustment mechanism also includes a first moving member and a second moving member, the first moving member is configured to be able to drive the sliding protrusion to move from the end of the second straight groove close to one side of the base cylinder to the first straight groove; the second moving member is configured to be able to drive the sliding protrusion to move from the end of the first straight groove close to one end of the sliding cylinder to the second straight groove.

2. The workpiece surface grinding device according to claim 1, characterized in that: The first moving member comprises a magnetic block, which is fixedly arranged at the end of the first straight groove close to the base cylinder and is magnetically connected to the sliding protrusion.

3. The workpiece surface grinding device according to claim 1, characterized in that: The second moving member includes a torsion spring.

4. The workpiece surface grinding device according to claim 1, characterized in that: The elastic member includes a tension spring.

5. The workpiece surface grinding device according to claim 1, characterized in that: A plurality of grooves are arranged on the outer peripheral wall of the annular fetal sac, and the extending direction of the grooves is arranged parallel to the axis of the annular fetal sac.

6. The workpiece surface grinding device according to claim 5, characterized in that: A friction rod is fixedly inserted in each of the grooves in parallel.

7. The workpiece surface grinding device according to claim 5, characterized in that: A plurality of strip-shaped protrusions are arranged on the inner belt surface of the grinding belt, and the strip-shaped protrusions extend along the belt width direction of the grinding belt and can be engaged with the grooves.

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