Portable plane grinding machine

Abstract

The invention provides a portable plane grinding machine, and relates to the technical field of grinding, the portable plane grinding machine comprises a rack, a mounting assembly, a translation assembly and a grinding device, and the mounting assembly comprises a leveling device and a mounting plate and is used for adjusting the rack to be horizontal and fixing the grinding machine. The translation assembly comprises a driving device, a longitudinal platform and a transverse platform, the driving device is used for driving the longitudinal platform to translate in the length direction of the rack, and the transverse platform can move on the longitudinal platform in the width direction of the rack. The grinding device comprises a fixed support, a movable support, an adjusting assembly, a power device and a grinding head, the grinding head is installed on the movable support and driven by the power device, and the adjusting assembly is connected with the adjusting end of the movable support and the fixed support and used for controlling the rotating angle of the movable support. According to the design, the portability of the polisher is improved, the polisher adapts to different operation environments, and especially under the condition that the space is limited, compared with manual polishing, automatic operation improves the efficiency and reduces the manual labor intensity and the precision problem.

Description

Technical Field

[0001] This application relates to the field of grinding technology, and particularly to a portable surface grinding machine. Background Art

[0002] In large-scale steel structure or mechanical equipment installation projects, on-site precision machining of structural planes is often required to meet the installation precision requirements. These planes to be machined may be located close to the ground, vertically installed, or in positions with limited space, such as equipment bases, track joints, or assembly joints. Traditional machining methods, such as milling machines and surface grinders, although capable of achieving high-precision machining, are difficult to adapt to the flexibility of on-site operations and environmental limitations due to their large volume, dependence on fixed power configurations, and site conditions.

[0003] In addition, although manual grinding is flexible in operation, it is often difficult to ensure the flatness, roughness, and dimensional accuracy of the machined plane due to the technical level and physical strength of the operator. Especially when dealing with large areas or high-hardness materials, the efficiency is low and the quality stability is poor. Some existing portable grinding equipment (such as angle grinders and grinders) is usually only suitable for local trimming or deburring, lacking targeted design for overall precision machining of the plane and unable to meet the requirements of high-precision plane machining.

[0004] Application Content

[0005] In view of this, this application proposes a portable surface grinding machine to solve the problems of inconvenient equipment and insufficient precision of manual grinding during on-site machining of large structural planes in the prior art.

[0006] The technical solution of this application is realized as follows:

[0007] This application provides a portable surface grinding machine, including:

[0008] A frame, which is a frame structure;

[0009] An installation component, including a leveling device and a mounting plate. The leveling device is arranged between the bottom of the frame and the mounting plate. The mounting plate is used for fixedly connecting with the foundation at the processing site, and the leveling device is used for adjusting the height and levelness of the frame relative to the mounting plate;

[0010] A translation component, including a driving device, a longitudinal platform, and a transverse platform. The longitudinal platform is slidably arranged on the top surface of the frame. The driving device is arranged on the frame and is used to drive the longitudinal platform to move along the length direction of the frame. The transverse platform is slidably arranged on the top surface of the longitudinal platform and can move along the width direction of the frame;

[0011] The grinding device includes a fixed bracket, a movable bracket, an adjustment assembly, a power device, and a grinding head. The fixed bracket is fixedly arranged on the horizontal platform. The movable bracket is hinged to the fixed bracket through a hinge end to form a rotating pair. The adjustment assembly connects the adjustment end of the movable bracket to the fixed bracket to control the rotation angle of the movable bracket. The grinding head is installed in the hinge end area of the movable bracket, and its working end extends downward to the working area inside the machine frame. The power device is arranged on the movable bracket and is drivingly connected to the grinding head.

[0012] Based on the above technical solution, preferably, the longitudinal platform is slidably connected to the machine frame through two longitudinal guide rail devices, and the horizontal platform is slidably connected to the longitudinal platform through two horizontal guide rail devices;

[0013] The driving device includes a driving member, a bearing seat, a lead screw, and a nut seat. The lead screw is arranged in parallel on one side in the length direction of the machine frame. The two ends of the lead screw are respectively fixedly connected to the machine frame through the bearing seats. The nut seat is threadedly connected to the lead screw and is fixedly connected to the longitudinal platform. The driving member is connected to one end of the lead screw to drive the lead screw to rotate.

[0014] Based on the above technical solution, preferably, the grinding head includes a mounting bracket, a driving wheel, a grinding wheel, a tensioning wheel system, and an endless abrasive belt;

[0015] The mounting bracket is fixedly connected to the hinge end area of the movable bracket;

[0016] The driving wheel is rotatably arranged on the upper part of the mounting bracket and is connected to the power device;

[0017] The grinding wheel is rotatably arranged on the lower part of the mounting bracket;

[0018] The tensioning wheel system is adjustably arranged in the middle of the mounting bracket;

[0019] The endless abrasive belt is wound around and sleeved on the driving wheel, the grinding wheel, and the tensioning wheel system.

[0020] Based on the above technical solution, preferably, the tensioning wheel system includes a linkage shaft, a tensioning arm, a linkage arm, a tensioning pull rod, and a tensioning wheel;

[0021] The linkage shaft is rotatably arranged on the mounting bracket and is located between the driving wheel and the grinding wheel;

[0022] One ends of the tensioning arm and the linkage arm are respectively fixedly connected to the linkage shaft to form a synchronous rotation structure;

[0023] The tensioning wheel shaft is installed at the other ends of the tensioning arm and the linkage arm, and the tensioning wheel is rotatably installed on the tensioning wheel shaft;

[0024] One end of the tension rod is connected to the tension arm, and the other end is connected to the side wall of the mounting bracket. By adjusting the tension rod, the tension arm can be driven to drive the linkage arm to rotate synchronously around the linkage shaft, thereby changing the position of the tension wheel to adjust the tension of the endless abrasive belt.

[0025] On the basis of the above technical solution, preferably, a first connecting seat is rotatably provided on the side wall of the mounting bracket, and a second connecting seat is rotatably provided at the end of the tension arm away from the tension wheel. The tension rod is of a double-headed screw structure. Its lower end is fixedly connected to the second connecting seat by threads, and its upper end passes through the through hole of the first connecting seat. Tension nuts are provided at both the upper and lower ends of the through hole of the first connecting seat. The tension nuts are installed on the threads at the upper end of the tension rod. The tension rod can be connected to the first connecting seat in a two-way adjustable manner up and down by the upper and lower tension nuts.

[0026] On the basis of the above technical solution, preferably, the grinding head further includes an alignment adjustment device, which includes an alignment adjustment knob and a sliding sleeve.

[0027] A straight chute is provided along the length direction at the end of the linkage arm away from the linkage shaft.

[0028] The sliding sleeve is arranged in the straight chute and can slide along the straight chute.

[0029] One end of the tension wheel shaft passes through the tension arm movably, and the other end passes through the sliding sleeve.

[0030] The alignment adjustment knob passes through the through hole at the end of the linkage arm and is threadedly connected to the sliding sleeve, and is used to drive the sliding sleeve to move along the straight chute, so as to drive the angle deflection of the tension wheel shaft, and further change the axis angle of the tension wheel, realizing the alignment adjustment control of the endless abrasive belt.

[0031] On the basis of the above technical solution, preferably, the adjustment assembly includes a linear slide table, an inclined chute bracket and a flat shaft.

[0032] The fixed part of the linear slide table is installed on the fixed bracket.

[0033] The inclined chute bracket is fixedly connected to the sliding part of the linear slide table.

[0034] The flat shaft passes through the inclined chute of the inclined chute bracket, and its two ends are connected to the movable bracket through bearings.

[0035] The linear slide table is used to drive the inclined chute bracket to move, so that the flat shaft slides along the inclined chute, thereby driving the movable bracket to rotate around the hinge end.

[0036] On the basis of the above technical solution, preferably, the adjusting assembly further includes a locking screw and a locking nut. A waist-shaped hole is formed in the movable bracket along the sliding direction of the sliding portion, a connecting hole is formed in the fixed bracket, the locking screw passes through the waist-shaped hole and is connected to the connecting hole, and the locking nut is located above the waist-shaped hole and is threadedly connected to the locking screw.

[0037] On the basis of the above technical solution, preferably, the grinding device further includes a fine adjustment device, which includes a connecting plate, a side plate, a bottom plate, a top plate, an adjusting bolt and a locking bolt;

[0038] The side plate is vertically fixed to the hinged end area of the movable bracket;

[0039] The top plate and the bottom plate are respectively horizontally fixed to the top and bottom of the side plate;

[0040] One end of the connecting plate is fixedly connected to the grinding head, and the other end is located between the top plate and the bottom plate and is attached to the side plate;

[0041] The locking bolt passes through the connecting plate and cooperates with the strip-shaped hole on the side plate;

[0042] The adjusting bolts are respectively threadedly connected to the top plate and the bottom plate, and their ends abut against the upper and lower surfaces of the connecting plate; by rotating the adjusting bolts, the position of the connecting plate relative to the side plate in the vertical direction can be adjusted.

[0043] On the basis of the above technical solution, preferably, the leveling device includes an upper adjusting bolt, a lower adjusting bolt and a transition plate. The transition plate is fixedly arranged on the bottom surface of the frame. The upper adjusting bolt is threadedly connected to the transition plate, and its lower end abuts against the surface of the mounting plate. The lower adjusting bolt movably passes through the transition plate and is threadedly connected to the mounting plate.

[0044] The present application has the following beneficial effects compared with the prior art:

[0045] (1) For the grinding machine disclosed in the present application, the installation assembly enables the grinding machine to be conveniently installed and adjusted on site, so it has high portability. The equipment can quickly adapt to different working environments, especially in the case of limited space or on-site operations, and is more flexible than traditional equipment. Compared with manual grinding, the automated translation and grinding devices improve work efficiency, reduce manual labor intensity, and at the same time reduce the accuracy problems caused by improper manual operation.

[0046] (2) By adjusting the tension pull rod, the tension arm and the linkage arm can be driven to rotate synchronously around the linkage shaft. This action will change the position of the tension pulley, thereby adjusting the tension of the endless abrasive belt. By precisely controlling the position of the tension pulley, it is possible to ensure that the tension of the abrasive belt is within a suitable range, avoiding low work efficiency or abrasive belt damage caused by the abrasive belt being too loose or too tight.

[0047] (3) By setting the deviation adjusting device and rotating the deviation adjusting knob, the sliding sleeve can be driven to slide along the straight chute of the linkage arm. The corresponding end of the tensioning wheel shaft is driven by the sliding sleeve to move, so as to realize the change of the installation angle of the axis of the tensioning wheel shaft. When the annular abrasive belt drives the tensioning wheel to rotate, the tensioning wheel will adjust the force on the annular abrasive belt, causing the annular abrasive belt to displace slowly in the width direction. By adjusting the deviation adjusting knob in the appropriate direction, the deviation adjustment of the abrasive belt can be realized.

[0048] (4) By setting the adjusting component and rotating the knob of the linear slide, the inclined chute bracket will be driven to move linearly along the sliding part of the linear slide. The inclined chute bracket will drive the movable bracket to rotate around the hinge axis through the flat shaft, and the flat shaft itself will also rotate slightly. When the movable bracket rotates around the hinge axis, the whole grinding head rotates around the hinge axis, and the grinding wheel will realize the lifting action. When the grinding wheel descends, the grinding feed will be realized. When the grinding wheel ascends, the retraction will be realized, and thus the micro feed adjustment of the grinding wheel can be realized.

[0049] (5) By setting the fine adjustment device, the parallelism between the grinding wheel and the axis and the bottom surface of the fixed bracket can be adjusted, so as to adjust the transverse precision of the grinding plane. Description of the Drawings

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0051] Figure 1 It is a schematic three-dimensional structure diagram of the portable surface grinding machine disclosed in the present application;

[0052] Figure 2 It is a schematic assembly structure diagram of the frame and the translation component disclosed in the present application;

[0053] Figure 3 It is a schematic three-dimensional structure diagram of the grinding device disclosed in the present application;

[0054] Figure 4 It is a schematic three-dimensional structure diagram of the first perspective of the grinding head disclosed in the present application;

[0055] Figure 5 It is a schematic three-dimensional structure diagram of the second perspective of the grinding head disclosed in the present application;

[0056] Figure 6 It is a partial cross-sectional view taken along the center of the tensioning wheel system and the center of the linkage shaft disclosed in the present application;

[0057] Figure 7A plan sectional view of the grinding device disclosed in this application;

[0058] Figure 8 A sectional view of the frame of this application installed on the foundation;

[0059] Reference numerals:

[0060] 1. Frame;

[0061] 2. Installation assembly; 21. Leveling device; 22. Installation plate; T. Foundation; 211. Upper adjusting bolt; 212. Lower pressing bolt; 213. Transition plate;

[0062] 3. Translation assembly; 31. Driving device; 311. Driving part; 312. Bearing seat; 313. Lead screw; 314. Nut seat; 32. Longitudinal platform; 33. Transverse platform; 34. Longitudinal guide rail device; 35. Transverse guide rail device; S. Locking knob;

[0063] 4. Grinding device; 41. Fixed bracket; 42. Movable bracket; Z. Hinge shaft;

[0064] 43. Adjusting assembly; 431. Linear slide; 432. Inclined chute bracket; 433. Flat shaft; 4311. Fixed part; 4312. Sliding part; 4321. Inclined groove;

[0065] 44. Power device; 441. Rotating motor; 442. Driving wheel; 443. Driven wheel; 444. Transmission part;

[0066] 45. Grinding head; 451. Installation bracket; 452. Driving wheel; 453. Grinding wheel; 455. Annular abrasive belt; 454. Tensioning wheel system; 4541. Linking shaft; 4542. Tensioning arm; 4543. Linking arm; 4544. Tensioning pull rod; 4545. Tensioning wheel; 4545a. Tensioning wheel shaft; 4546. First connecting seat; 4547. Second connecting seat; 4548. Tensioning nut; 456. Deviation adjusting device; 4543a. Straight chute; 4561. Deviation adjusting knob; 4562. Sliding sleeve;

[0067] 46. Locking device; 461. Locking screw; 462. Locking nut; 421. Kidney-shaped hole; 411. Connecting hole;

[0068] 47. Fine-tuning device; 471. Connecting plate; 472. Side plate; 473. Bottom plate; 474. Top plate; 475. Adjusting bolt; 476. Locking bolt; 4721. Strip-shaped hole. Detailed implementation manners

[0069] Next, in combination with the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0070] As Figure 1 shown, in combination with Figures 2-3 , an embodiment of the present application discloses a portable surface grinding machine, which includes a frame 1, a mounting assembly 2, a translation assembly 3 and a grinding device 4.

[0071] Among them, the frame 1 is a frame structure. Specifically, it is a cuboid frame structure, providing a stable support and installation foundation, and at the same time being convenient to place above the flat surface of the processing site to be ground.

[0072] The mounting assembly 2 provides a component for connecting the grinding machine and the foundation of the processing site. It includes a leveling device 21 and a mounting plate 22. The leveling device 21 is arranged between the bottom of the frame 1 and the mounting plate 22. The mounting plate 22 is used for fixedly connecting with the foundation of the processing site. In some embodiments, the mounting plate 22 is fixed to the foundation by means of welding or expansion bolts. The leveling device 21 is used to adjust the height and levelness of the frame 1 relative to the mounting plate 22. In this embodiment, after the mounting plate 22 is fixed to the foundation, through the cooperation of the leveling device 21 installed at the bottom of the frame 1 and the mounting plate 22, the installation height and levelness of the frame 1 and the mounting plate 22 are adjusted to ensure the grinding levelness and flatness and improve the grinding accuracy.

[0073] In some embodiments, according to the environment of the processing site, the grinding machine can be flexibly installed. Whether the processing site is horizontal or vertical, the grinding machine can be effectively installed on the processing site through the mounting assembly 2. In some other embodiments, the grinding machine can also be installed on an inclined processing site.

[0074] The translation assembly 3 is used to carry the grinding device 4 to move in the horizontal direction of the frame 1. The translation assembly 3 includes a driving device 31, a longitudinal platform 32 and a transverse platform 33. The longitudinal platform 32 is slidably arranged on the top surface of the frame 1. The driving device 31 is arranged on the frame 1 and is used to drive the longitudinal platform 32 to move along the length direction of the frame 1. The transverse platform 33 is slidably arranged on the top surface of the longitudinal platform 32 and can move along the width direction of the frame 1.

[0075] In this embodiment, the grinding device 4 is installed on the transverse platform 33. By moving the transverse platform 33, the transverse platform 33 and the grinding device 4 can be synchronously translated along the width direction of the frame 1 on the longitudinal platform 32, thereby realizing the movement of the grinding device 4 along the width direction of the frame 1. The longitudinal platform 32 can be driven by the driving device 31 to move along the length direction of the frame 1, so that the longitudinal platform 32, the transverse platform 33 and the grinding device 4 can be synchronously moved along the length direction of the frame 1.

[0076] The combination of the driving device 31, the longitudinal platform 32 and the transverse platform 33 enables the grinding device 4 to move flexibly on the plane, realizing precise machining in a large range, and improving the machining efficiency and precision.

[0077] The grinding device 4, as a component directly performing grinding operations on the on-site machining plane, includes a fixed bracket 41, a movable bracket 42, an adjustment assembly 43, a power device 44 and a grinding head 45.

[0078] The fixed bracket 41 is fixedly arranged on the transverse platform 33, providing the installation basis for the entire grinding device 4. The movable bracket 42 is hinged to the fixed bracket 41 through a hinge end to form a rotating pair. The adjustment assembly 43 connects the adjustment end of the movable bracket 42 and the fixed bracket 41, and is used to control the rotation angle of the movable bracket 42. The grinding head 45 is installed in the hinge end area of the movable bracket 42, and its working end extends downward to the working area inside the frame 1. The power device 44 is arranged on the movable bracket 42 and is drivingly connected to the grinding head 45, responsible for providing driving force for the grinding head 45.

[0079] In this embodiment, the hinge end of the movable bracket 42 is hinged to the fixed bracket 41 through a hinge shaft Z. The grinding head 45 is installed in the hinge end area of the movable bracket 42. In this way, when the movable bracket 42 rotates around the hinge shaft Z, the grinding head 45 can be driven to rotate to realize the lifting operation of the grinding head 45.

[0080] Through the adjustment assembly 43, the rotation angle of the movable bracket 42 relative to the fixed bracket 41 can be adjusted. The angle change of the movable bracket 42 directly affects the height of the grinding head 45. By precisely controlling the angle of the movable bracket 42, the grinding head 45 can be raised or lowered to the required position. When the grinding head 45 descends, the grinding feed is realized, that is, the grinding head 45 drives the endless abrasive belt 455 to contact and grind the workpiece material; when the grinding head 45 rises, the retraction is realized, that is, the grinding head 45 drives the endless abrasive belt 455 to leave the workpiece surface. Thus, through the adjustment assembly 43, the micro-adjustment of the grinding head 45 can be realized, the visual feed amount can be realized, and thus the precise grinding of the workpiece can be realized.

[0081] The grinding machine disclosed by the present invention can be conveniently installed and adjusted on-site through the installation component 2, thus having high portability. The device can quickly adapt to different working environments, especially in the case of limited space or on-site operations, and is more flexible than traditional devices. Compared with manual grinding, the automated translation and grinding device 4 improves work efficiency, reduces manual labor intensity, and at the same time reduces the accuracy problems caused by improper manual operation.

[0082] In order to enable the longitudinal platform 32 and the transverse platform 33 to move smoothly in a straight line on the frame 1, in this embodiment, two longitudinal guide rail devices 34 are provided between the longitudinal platform 32 and the frame 1. The two longitudinal guide rail devices 34 are arranged on the top surfaces of the two long sides of the frame 1. Refer to the attached Figure 2 As shown, the longitudinal guide rail device 34 is composed of a linear guide rail and several sliders. The linear guide rail is fixed on the top surface of the frame 1 and is parallel to the length direction of the frame 1. The bottom surface of the longitudinal platform 32 is slidably connected to the linear guide rail through the sliders.

[0083] Correspondingly, in order to enable the transverse platform 33 to move smoothly in a straight line on the longitudinal platform 32, in this embodiment, two transverse guide rail devices 35 are provided between the transverse platform 33 and the longitudinal platform 32. The two transverse guide rail devices 35 are fixedly arranged in parallel on the top surface of the longitudinal platform 32. The transverse guide rail device 35 and the longitudinal guide rail device 34 are perpendicular to each other, and the structures of the transverse guide rail device 35 and the longitudinal guide rail device 34 are the same.

[0084] In order to enable the grinding device 4 to translate in the horizontal direction, this embodiment shows a structural form of the driving device 31. Specifically, refer to the attached Figure 2 As shown, the driving device 31 includes a driving member 311, a bearing seat 312, a lead screw 313, and a nut seat 314. The lead screw 313 is arranged in parallel on one side of the length direction of the frame 1. The two ends of the lead screw 313 are respectively fixedly connected to the frame 1 through the bearing seats 312. The nut seat 314 is threadedly connected to the lead screw 313 and is fixedly connected to the longitudinal platform 32. The driving member 311 is connected to one end of the lead screw 313 and is used to drive the lead screw 313 to rotate.

[0085] Adopting the above technical solution, the driving member 311 drives the lead screw 313 to rotate. The rotation of the lead screw 313 drives the nut seat 314 to move horizontally along the lead screw 313, thereby driving the longitudinal platform 32 to translate in the length direction of the frame 1. During the movement of the longitudinal platform 32, the longitudinal platform 32 carries the transverse platform 33 and the grinding device 4 to move synchronously, so as to realize the translation of the grinding head 45 in the length direction of the frame 1, and further realize the grinding operation on the length direction of the workpiece surface.

[0086] It should be noted that when it is necessary to adjust the operating range of the grinding head 45 in the width direction of the workpiece surface, the transverse platform 33 can be manually slid to move the transverse platform 33 along the width direction of the frame 1 on the longitudinal platform 32, thereby realizing the adjustment of the grinding head 45 in the width direction of the workpiece surface. When the transverse platform 33 is in place on the longitudinal platform 32, the transverse platform 33 and the longitudinal platform 32 can be locked in position by the locking knob S. Specifically, the locking knob S passes through the transverse platform 33 in a threaded manner and abuts against the top surface of the longitudinal platform 32. By screwing the locking knob S, the transverse platform 33 can be locked with the longitudinal platform 32.

[0087] In the above embodiment, the driving member 311 can be a hand crank or a reduction motor. By setting the hand crank, the grinding head 45 can be manually driven to move and grind simultaneously. By setting the reduction motor, electrified operation can be carried out, reducing labor intensity and obtaining more stable grinding quality.

[0088] In order to enable the grinding head 45 to grind the plane at the engineering site, this embodiment shows a structural form of the grinding head 45. Specifically, referring to the attached Figure 3 As shown, the grinding head 45 includes a mounting bracket 451, a driving wheel 452, a grinding wheel 453, a tensioning wheel system 454, and an endless abrasive belt 455.

[0089] The mounting bracket 451 is fixedly connected to the articulated end area of the movable bracket 42. The mounting bracket 451 is the basic component of the grinding head 45 and is responsible for firmly connecting the grinding head 45 to the articulated end of the movable bracket 42.

[0090] The driving wheel 452 is rotatably arranged on the upper part of the mounting bracket 451 and is connected to the power device 44. The grinding wheel 453 is rotatably arranged on the lower part of the mounting bracket 451. The tensioning wheel system 454 is adjustably arranged in the middle of the mounting bracket 451. The endless abrasive belt 455 is wound around and sleeved on the driving wheel 452, the grinding wheel 453, and the tensioning wheel system 454.

[0091] The driving wheel 452 is powered by the power device 44 to make the endless abrasive belt 455 continuously drive. The cooperation of the driving wheel 452, the grinding wheel 453, and the tensioning wheel system 454 ensures that the endless abrasive belt 455 runs on a fixed track, thus ensuring the high efficiency and stability during the grinding process. The driving wheel 452 provides power, the grinding wheel 453 is responsible for driving the endless abrasive belt 455 to contact the workpiece for grinding, and the tensioning wheel system 454 adjusts the tension of the abrasive belt to ensure smooth operation of the abrasive belt without slipping.

[0092] The adjustable design of the tensioning wheel system 454 enables the abrasive belt of the grinding head 45 to adapt to different grinding requirements and the processing needs of different materials. By adjusting the tension force, the working state of the abrasive belt can be controlled to cope with higher or lower grinding pressures.

[0093] In this embodiment, referring to the attached Figures 3-6 As shown, the tensioning pulley system 454 includes a linkage shaft 4541, a tensioning pulley shaft 4545a, a tensioning arm 4542, a linkage arm 4543, a tensioning rod 4544, and a tensioning pulley 4545.

[0094] Among them, the linkage shaft 4541 is responsible for supporting and transmitting the rotational force. It is rotatably arranged on the mounting bracket 451 and is located between the driving pulley 452 and the grinding wheel 453. The rotation of the linkage shaft 4541 drives other components connected to it to rotate synchronously, so it plays the role of linking the entire tensioning pulley system 454.

[0095] One end of the tensioning arm 4542 and the linkage arm 4543 are respectively fixedly connected to the linkage shaft 4541 to form a synchronous rotation structure. When the linkage shaft 4541 rotates, the tensioning arm 4542 and the linkage arm 4543 rotate synchronously around the linkage shaft 4541. Their common rotation enables the position of the tensioning pulley 4545 to be adjusted synchronously, and the combined supporting effect of the tensioning arm 4542 and the linkage arm 4543 on the tensioning pulley system 454 will be more conducive to the stability of the tensioning pulley system 454, ensuring the working stability of the tensioning pulley system 454 under the working vibration conditions of the grinding machine.

[0096] The tensioning pulley shaft 4545a is installed at the other ends of the tensioning arm 4542 and the linkage arm 4543, and the tensioning pulley 4545 is rotatably installed on the tensioning pulley shaft 4545a; the tensioning pulley shaft 4545a provides the installation basis for the tensioning pulley 4545. In this embodiment, the tensioning pulley 4545 is connected to the tensioning pulley shaft 4545a through bearings. The role of the tensioning pulley 4545 is to directly contact the endless abrasive belt 455 and adjust the tightness of the abrasive belt by changing its position.

[0097] One end of the tensioning rod 4544 is connected to the tensioning arm 4542, and the other end is connected to the side wall of the mounting bracket 451; by adjusting the tensioning rod 4544, the tensioning arm 4542 can be driven to drive the linkage arm 4543 to rotate synchronously around the linkage shaft 4541, thereby changing the position of the tensioning pulley 4545 to adjust the tension of the endless abrasive belt 455.

[0098] By adjusting the tensioning rod 4544, the tensioning arm 4542 and the linkage arm 4543 can be driven to rotate synchronously around the linkage shaft 4541. This action will change the position of the tensioning pulley 4545, thereby adjusting the tension of the endless abrasive belt 455. By precisely controlling the position of the tensioning pulley 4545, it is possible to ensure that the tension of the abrasive belt is within an appropriate range, avoiding low work efficiency or abrasive belt damage caused by the abrasive belt being too loose or too tight.

[0099] In order to control the position of the tensioning wheel 4545 by adjusting the tensioning rod 4544, in this embodiment, a first connecting seat 4546 is rotatably arranged on the side wall of the mounting bracket 451. One end of the tensioning arm 4542 away from the tensioning wheel 4545 is rotatably provided with a second connecting seat 4547. The tensioning rod 4544 has a double-headed screw structure. Its lower end is fixedly connected to the second connecting seat 4547 by threads, and its upper end passes through the through hole of the first connecting seat 4546. Tensioning nuts 4548 are provided at both the upper and lower ends of the through hole of the first connecting seat 4546. The tensioning nuts 4548 are installed on the threads at the upper end of the tensioning rod 4544. The upper and lower tensioning nuts 4548 can connect the tensioning rod 4544 and the first connecting seat 4546 in a two-way adjustable manner up and down.

[0100] With the above technical solution, when it is necessary to increase the tension of the endless abrasive belt 455, the end of the tensioning arm 4542 away from the linkage shaft 4541 needs to rotate downward. At this time, by loosening the lower tensioning nut 4548 and then tightening the upper tensioning nut 4548, the second connecting seat 4547 is moved closer to the first connecting seat 4546 along the tensioning rod 4544. When the required tension is reached, then tighten the lower tensioning nut 4548 to stabilize the tensioning effect. In this way, the rotation angle of the tensioning arm 4542 can be controlled, and the position of the tensioning wheel 4545 can be adjusted. Correspondingly, when it is necessary to reduce the tension of the endless abrasive belt 455, only need to loosen the upper tensioning nut 4548 and then tighten the lower tensioning nut 4548.

[0101] Through the rotational settings of the first connecting seat 4546 and the second connecting seat 4547, the tensioning arm 4542 can be unrestricted by the fixed parts 4311 during the adjustment process and maintain a smooth movement trajectory. This design ensures that the tensioning arm 4542 can move freely throughout the adjustment process by reducing friction, optimizing the movement trajectory, and dispersing the acting forces, avoiding jamming or hindrance phenomena.

[0102] The grinding head 45 disclosed in this embodiment further includes an alignment device 456. Refer to the attached Figure 5 and 6 As shown, the alignment device 456 includes an alignment knob 4561 and a sliding sleeve 4562.

[0103] One end of the linkage arm 4543 away from the linkage shaft 4541 is provided with a straight chute 4543a along its length direction; the sliding sleeve 4562 is arranged in the straight chute 4543a and can slide along the straight chute 4543a; one end of the tension pulley shaft 4545a passes through the tension arm 4542 movably, and the other end passes through the sliding sleeve 4562; the deviation adjustment knob 4561 passes through the through hole at the end of the linkage arm 4543 and is threadedly connected to the sliding sleeve 4562, and is used to drive the sliding sleeve 4562 to move along the straight chute 4543a, so as to drive the tension pulley shaft 4545a to deflect at an angle, and further change the axis angle of the tension pulley 4545, so as to realize the deviation adjustment control of the endless abrasive belt 455.

[0104] Adopting the above technical solution, by rotating the deviation adjustment knob 4561, the sliding sleeve 4562 can be driven to slide along the straight chute 4543a of the linkage arm 4543, and the corresponding end of the tension pulley shaft 4545a is driven to move through the sliding sleeve 4562, so as to realize the change of the axis installation angle of the tension pulley shaft 4545a. When the endless abrasive belt 455 drives the tension pulley 4545 to rotate, the tension pulley 4545 will adjust the force on the endless abrasive belt 455, so that the endless abrasive belt 455 undergoes a slow displacement in the width direction. By adjusting the deviation adjustment knob 4561 in an appropriate direction, the deviation adjustment of the abrasive belt can be realized.

[0105] In order to realize the lifting movement of the grinding head 45 and further adjust the feed amount, a structural form of the adjusting assembly 43 is shown in this embodiment. Refer to the attached Figure 3 and the attached Figure 7 As shown, the adjusting assembly 43 includes a linear slide table 431, an inclined chute bracket 432 and a flat shaft 433.

[0106] The linear slide table 431 is composed of a fixed part 4311 and a sliding part 4312. The fixed part 4311 is installed on the fixed bracket 41, and the sliding part 4312 can slide linearly on the fixed part 4311. In this embodiment, the linear slide table 431 is preferably a lead screw slide table. Among them, the fixed part 4311 is composed of a slide table base, a lead screw and a knob, and the sliding part 4312 is a slider installed on the lead screw.

[0107] The inclined chute bracket 432 is fixedly connected to the sliding part 4312 of the linear slide table 431, and it will move synchronously with the sliding of the sliding part 4312 of the linear slide table 431. An inclined chute 4321 is arranged on the inclined chute bracket 432, and the angle of the inclined chute 4321 determines the sliding direction and sliding stroke of the flat shaft 433.

[0108] The flat shaft 433 penetrates through the inclined chute 4321 of the inclined chute bracket 432, and its two ends are connected to the movable bracket 42 through bearings, so as to ensure that while the flat shaft 433 slides in the inclined chute 4321, it can drive the movable bracket 42 to rotate.

[0109] In this embodiment, turning the knob of the rotary linear slide 431 will drive the inclined chute bracket 432 to move linearly along the sliding part 4312 of the linear slide 431. The inclined chute bracket 432 will drive the movable bracket 42 to rotate around the hinge axis Z through the flat shaft 433, and the flat shaft 433 itself will also rotate slightly. When the movable bracket 42 rotates around the hinge axis Z, the entire grinding head 45 rotates around the hinge axis Z, and the grinding wheel 453 will achieve a lifting action. When the linear slide 431 drives the inclined chute bracket 432 to move to the right, the grinding wheel 453 will descend to achieve grinding feed; when the linear slide 431 drives the inclined chute bracket 432 to move to the left, the grinding wheel 453 will rise to achieve retraction. Through the deceleration effect of the screw rod of the linear slide 431, the deceleration effect of the inclined chute 4321 of the inclined chute bracket 432, and the deceleration effect of the lever composed of the flat shaft 433, the hinge axis Z, and the mounting bracket 451, micro-adjustment of the grinding wheel 453 can be achieved, and a visible feed amount of less than 0.01 mm can be realized.

[0110] After the movable bracket 42 adjusts its rotation position on the fixed bracket 41, in order to prevent the movable bracket 42 from rotating slightly relative to the fixed bracket 41, the grinding device 4 of this embodiment is also provided with a locking device 46. The locking device 46 includes a locking screw 461 and a locking nut 462. A waist-shaped hole 421 is formed in the movable bracket 42 along the sliding direction of the sliding part 4312. A connection hole 411 is formed in the fixed bracket 41. The locking screw 461 passes through the waist-shaped hole 421 and is connected to the connection hole 411. The locking nut 462 is located above the waist-shaped hole 421 and is threadedly connected to the locking screw 461.

[0111] In the initial state, the lower end of the locking screw 461 is fixedly connected to the connection hole 411 by threads, and the locking nut 462 can move up and down on the locking screw 461 by screwing.

[0112] With this setting, after adjusting the position of the grinding head 45 through the adjusting assembly 43, by rotating the locking nut 462, the locking nut 462 presses against the top surface of the movable bracket 42, thereby keeping the relative positions of the movable bracket 42 and the fixed bracket 41 unchanged.

[0113] By providing the waist-shaped hole 421, a certain movement space for the locking screw 461 in the waist-shaped hole 421 can be provided to accommodate the slight swing angle of the movable bracket 42.

[0114] As some embodiments, referring to the attached Figure 5 and 7 shown, the grinding device 4 of this embodiment further includes a fine adjustment device 47. The fine adjustment device 47 includes a connecting plate 471, a side plate 472, a bottom plate 473, a top plate 474, an adjusting bolt 475, and a locking bolt 476.

[0115] The side plate 472 is vertically fixed to the hinge end area of the movable bracket 42; the top plate 474 and the bottom plate 473 are horizontally fixed to the top and bottom of the side plate 472 respectively; one end of the connecting plate 471 is fixedly connected to the grinding head 45, and the other end is located between the top plate 474 and the bottom plate 473 and is in contact with the side plate 472; the locking bolt 476 passes through the connecting plate 471 and cooperates with the elongated hole on the side plate 472; the adjusting bolts 475 are respectively threadedly connected to the top plate 474 and the bottom plate 473, and their ends abut against the upper and lower surfaces of the connecting plate 471; by rotating the adjusting bolts 475, the position of the connecting plate 471 relative to the side plate 472 in the vertical direction can be adjusted.

[0116] Adopting the above technical solution, by loosening the locking bolt 476, the connecting plate 471 and the side plate 472 are disengaged. At this time, by rotating the adjusting bolts 475, the position of the connecting plate 471 relative to the side plate 472 in the vertical direction can be adjusted.

[0117] In this embodiment, two adjusting bolts 475 are arranged along the length direction of the bottom plate 473. Correspondingly, two adjusting bolts 475 are also arranged along the length direction of the top plate 474. By respectively adjusting the adjusting bolts 475 at both ends of the bottom plate 473 in the length direction, the connecting plate 471 can be slightly rotated relative to the contact surface of the side plate 472, thereby adjusting the parallelism between the grinding wheel 453 and the axis and the bottom surface of the fixed bracket 41, and thus adjusting the transverse accuracy of the grinding plane. After the adjusting bolts 475 on the bottom plate 473 are adjusted, then rotate the adjusting bolts 475 on the top plate 474 so that the adjusting bolts 475 abut against the top surface of the connecting plate 471, making the connecting plate 471 unable to rotate relative to the side plate 472. At this time, the connecting plate 471 and the side plate 472 can be locked and fixed by the locking bolt 476. Through the elongated hole on the side plate 472, it can adapt to the fact that after the micro-rotation adjustment of the connecting plate 471, the locking bolt 476 can pass through the connecting plate 471 and move within the adjustable space of the elongated hole, realizing the fixation of the connecting plate 471 and the side plate 472, and further realizing the position fixation of the grinding head 45 on the movable bracket 42.

[0118] In order to level the frame 1, this embodiment shows a structural form of the leveling device 21. Specifically, referring to the attached Figure 8 As shown, the leveling device 21 includes an upper adjusting bolt 211, a lower adjusting bolt 212 and a transition plate 213. The transition plate 213 is fixedly arranged on the bottom surface of the frame 1. The upper adjusting bolt 211 is threadedly connected to the transition plate 213, and its lower end abuts against the surface of the mounting plate 22. The lower adjusting bolt 212 movably passes through the transition plate 213 and is threadedly connected to the mounting plate 22.

[0119] The transition plate 213 is fixed to the threaded holes at the bottom of the frame 1 through fasteners, and the mounting plate 22 is fixed to the foundation by welding or expansion bolts. The upward adjustment bolt 211 abuts against the surface of the mounting plate 22 through the threaded hole on the transition plate 213, and the downward pressure bolt 212 passes through the through hole on the transition plate 213 and is screwed into the threaded hole of the mounting plate 22. Turning the upward adjustment bolt 211 downward can raise the transition plate 213, thereby driving the corresponding part of the frame 1 to rise. Turning the downward pressure bolt 212 downward can press the frame 1 against the mounting plate 22 through the supporting action of the upward adjustment bolt 211.

[0120] Multiple threaded holes for mating with the transition plate 213 can be provided below the frame 1 to expand the ability of the grinding machine to adapt to the foundation. During on-site use, the transition plate 213 can be installed at a suitable position according to the foundation conditions.

[0121] When the grinding machine is in use, first place the grinding machine at the corresponding position on the plane to be ground, align the center of the maximum grinding stroke of the grinding machine with the center of the plane to be ground approximately, then select the corresponding mounting holes on the frame 1 to fix the transition plate 213, and then fix the mounting plate 22 to the foundation by welding or expansion screws. Place a spirit level longitudinally and transversely on the measurement reference plane of the frame 1 to check the longitudinal and transverse level states of the frame 1, and cooperate with adjusting the upward adjustment bolt 211 and the downward pressure bolt 212 to adjust the frame 1 to be horizontal or vertical.

[0122] Adjust the linear slide 431 to lower the grinding wheel 453, drive the grinding head 45 to move through the driving device 31, check the gap between the endless abrasive belt 455 and the plane to be ground, find the highest point of the plane to be ground, then continue to adjust the linear slide 431 to lower the grinding wheel 453, make the endless abrasive belt 455 lightly contact the highest point of the plane to be ground, drive the grinding head 45 to move through the driving device 31, make the grinding wheel 453 move longitudinally, and start grinding; slightly loosen the locking device 46, adjust the linear slide 431 for grinding feed, then tighten the locking device 46, and continue to drive the grinding head 45 to move through the driving device 31 to make the grinding wheel 453 move longitudinally back and forth for further grinding.

[0123] When it is necessary to increase the grinding width, at the position where the endless abrasive belt 455 is away from the plane to be ground, loosen the locking knob S, manually push the transverse sliding platform, make the grinding head 45 move transversely by a displacement slightly less than the width of the abrasive belt, and then lock the locking knob S.

[0124] When the plane to be ground is ground to a certain range smooth and flat, use a spirit level or other instruments to check the levelness of the ground area or the parallelism with the reference plane. According to the deviation situation, finely adjust the fine adjustment device 47 to adjust the axis position of the grinding wheel 453, and continue to perform trial grinding, inspection and adjustment until the levelness of the ground area or the parallelism with the reference plane meets the requirements.

[0125] By selecting abrasive belts with different coarseness meshes, different grinding roughness and grinding speeds can be obtained. Selecting an abrasive belt with a low mesh number can achieve a larger grinding speed and a rougher grinding surface; selecting an abrasive belt with a high mesh number can achieve a smoother grinding surface, but the grinding speed is lower.

[0126] To increase the applicable grinding height range of the grinding machine, according to the length specifications of the available endless abrasive belt 455, various specifications of grinding heads 45 including mounting brackets 451 with different lengths can be designed, while sharing other components. Through the detachable connection and fine-tuning function of the fine-tuning device 47, the grinding head 45 can be conveniently replaced, and the grinding accuracy can be conveniently adjusted again.

[0127] This grinding machine is suitable for grinding horizontal surfaces and vertical surfaces. Through the improvement of the measurement method, it can also be used for grinding inclined planes. When the width of the plane to be ground is less than the width of the endless abrasive belt 455, the transverse guide device 35 and the transverse sliding platform can be omitted, and the grinding device 4 can be directly fixed on the longitudinal sliding platform to simplify the equipment.

[0128] The above is only the preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A portable surface grinder, characterized in that: include: The rack is a frame structure; The mounting assembly includes a leveling device and a mounting plate, wherein the leveling device is arranged between the bottom of the frame and the mounting plate, the mounting plate is used to be fixedly connected to the foundation at the processing site, and the leveling device is used to adjust the height and horizontality of the frame relative to the mounting plate; The translation assembly includes a driving device, a longitudinal platform and a transverse platform. The longitudinal platform is slidably arranged on the top surface of the frame. The driving device is arranged on the frame and is used to drive the longitudinal platform to move along the length direction of the frame. The transverse platform is slidably arranged on the top surface of the longitudinal platform and can move along the width direction of the frame. The grinding device includes a fixed bracket, a movable bracket, an adjustment component, a power device and a grinding head. The fixed bracket is fixedly arranged on a horizontal platform. The movable bracket is hinged with the fixed bracket through a hinged end to form a rotating pair. The adjustment component connects the adjustment end of the movable bracket and the fixed bracket to control the rotation angle of the movable bracket. The grinding head is installed in the hinged end area of ​​the movable bracket, and its working end extends downward to the working area inside the frame. The power device is arranged on the movable bracket and is drivingly connected to the grinding head.

2. The portable surface grinding machine according to claim 1, characterized in that: The longitudinal platform is slidably connected to the frame via two longitudinal guide rails, and the transverse platform is slidably connected to the longitudinal platform via two transverse guide rails; The driving device includes a driving member, a bearing seat, a screw and a nut seat. The screw is arranged parallel to one side of the length direction of the frame. Both ends of the screw are fixedly connected to the frame through the bearing seat respectively. The nut seat is threadedly connected to the screw and fixedly connected to the longitudinal platform. The driving member is connected to one end of the screw for driving the screw to rotate.

3. The portable surface grinder according to claim 1, characterized in that: The grinding head comprises a mounting bracket, a driving wheel, a grinding wheel, a tensioning wheel train and an annular abrasive belt; The mounting bracket is fixedly connected to the hinge end area of ​​the movable bracket; The driving wheel is rotatably arranged on the upper part of the mounting bracket and is connected to the power device; The grinding wheel is rotatably arranged at the lower part of the mounting bracket; The tensioning wheel system is adjustably arranged in the middle of the mounting bracket; The annular abrasive belt is sheathed around the driving wheel, the grinding wheel and the tensioning wheel system.

4. The portable surface grinding machine according to claim 3, characterized in that: The tensioning wheel system comprises a linkage shaft, a tensioning arm, a linkage arm, a tensioning rod and a tensioning wheel; The linkage shaft is rotatably arranged on the mounting bracket and is located between the driving wheel and the grinding wheel; One end of the tensioning arm and the linkage arm are respectively fixedly connected to the linkage shaft to form a synchronous rotation structure; The tensioning wheel shaft is installed on the other end of the tensioning arm and the linkage arm, and the tensioning wheel is rotatably installed on the tensioning wheel shaft; One end of the tensioning rod is connected to the tensioning arm, and the other end is connected to the side wall of the mounting bracket; by adjusting the tensioning rod, the tensioning arm can be driven to drive the linkage arm to rotate synchronously around the linkage shaft, thereby changing the position of the tensioning wheel to adjust the tension of the annular sanding belt.

5. The portable surface grinding machine according to claim 4, characterized in that: A first connecting seat is rotatably provided on the side wall of the mounting bracket, and a second connecting seat is rotatably provided on the end of the tensioning arm away from the tensioning wheel. The tensioning rod is a double-headed screw structure, the lower end of which is threadedly fixedly connected to the second connecting seat, and the upper end passes through the through hole of the first connecting seat. Tensioning nuts are provided at the upper and lower ends of the through hole of the first connecting seat. The tensioning nut is installed on the thread at the upper end of the tensioning rod. The upper and lower tensioning nuts can connect the tensioning rod to the first connecting seat in an upward and downward bidirectionally adjustable manner.

6. The portable surface grinding machine according to claim 4, characterized in that: The grinding head also includes a deviation adjustment device, which includes a deviation adjustment knob and a sliding sleeve; The end of the linkage arm away from the linkage shaft is provided with a straight sliding groove along its length direction; The sliding sleeve is arranged in the straight sliding groove and can slide along the straight sliding groove; One end of the tension wheel shaft movably passes through the tension arm, and the other end passes through the sliding sleeve; The deviation adjustment knob passes through the through hole at the end of the linkage arm and is threadedly connected to the sleeve, and is used to drive the sleeve to move along the straight slide groove to drive the tensioning wheel shaft to deflect the angle, thereby changing the axis angle of the tensioning wheel to achieve deviation control of the annular sanding belt.

7. The portable surface grinding machine according to claim 1, characterized in that: The adjustment assembly includes a linear slide, an inclined slide bracket and a flat shaft; The fixing part of the linear slide is installed on a fixing bracket; The inclined slide bracket is fixedly connected to the sliding part of the linear slide; The flat shaft passes through the inclined slot of the inclined slot bracket, and its two ends are connected to the movable bracket through bearings; The linear slide is used to drive the inclined slot bracket to move so that the flat shaft slides along the inclined slot, thereby driving the movable bracket to rotate around the hinge end.

8. The portable surface grinding machine according to claim 7, characterized in that: The grinding device also includes a locking device, which includes a locking screw and a locking nut. A waist-shaped hole is opened on the movable bracket along the sliding direction of the sliding part, and a connecting hole is opened on the fixed bracket. The locking screw passes through the waist-shaped hole and is fixedly connected to the connecting hole. The locking nut is located above the waist-shaped hole and is threadedly connected to the locking screw.

9. The portable surface grinding machine according to claim 1, characterized in that: The grinding device also includes a fine-tuning device, which includes a connecting plate, a side plate, a bottom plate, a top plate, an adjusting bolt and a locking bolt; The side panels are vertically fixed to the hinged end regions of the movable brackets; The top plate and the bottom plate are horizontally fixed to the top and bottom of the side plates respectively; One end of the connecting plate is fixedly connected to the grinding head, and the other end is located between the top plate and the bottom plate and is in contact with the side plate; The locking bolt passes through the connecting plate and matches with the strip-shaped hole on the side plate; The adjusting bolts are respectively threadedly connected to the top plate and the bottom plate, and their ends abut against the upper and lower surfaces of the connecting plate; the position of the connecting plate relative to the side plate in the vertical direction can be adjusted by rotating the adjusting bolts.

10. The portable surface grinding machine according to claim 1, characterized in that: The leveling device includes an upward adjustment bolt, a downward pressure bolt and a transition plate. The transition plate is fixedly arranged on the bottom surface of the frame. The upward adjustment bolt is threadedly connected to the transition plate, and its lower end abuts against the surface of the mounting plate. The downward pressure bolt movably passes through the transition plate and is threadedly connected to the mounting plate.

Images