Grinding device

Abstract

The present invention provides a grinding device, which includes a base frame, a sand belt assembly, and a constant force sensor installed on the base frame. The sand belt assembly includes a driving wheel, a driven wheel set, a grinding head, and a sand belt. The driving wheel and the driven wheel set are respectively rotatably arranged on the base frame. The grinding head is suspended outside the base frame, and the grinding head is connected to the constant force sensor. The sand belt is respectively sleeved on the driving wheel, the driven wheel set, and the grinding head. The part of the sand belt sleeved on the grinding head is used for grinding. The constant force sensor is used to sense the force condition of the grinding head and perform corresponding expansion and contraction to ensure that the grinding head grinds with a constant force. The grinding device provided by the present invention, through the setting of the constant force sensor, enables the grinding head to output a constant grinding force, increases the flexibility of the grinding device, ensures the consistency of the surface quality of parts, and improves the grinding quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of abrasive belt grinding, and more specifically, relates to a grinding device. Background Art

[0002] Traditional grinding operations are all completed on abrasive belt machines. There are many types of existing abrasive belt machines, including bench abrasive belt machines, vertical abrasive belt machines, hand-pushed abrasive belt machines, and dust-removing abrasive belt machines, etc. Most of the above types of abrasive belt machines are single-action abrasive belt machines, and their structures are all composed of a housing, a motor, a driving wheel, a driven wheel group, and an abrasive belt. Existing abrasive belt machines are relatively large in volume and occupy a relatively large area in the grinding workshop; the tensioning of the abrasive belt is all completed manually, and the tightness of the tensioned abrasive belt varies; the abrasive belt machine cannot process the corners of the grinding parts, and special tools are used for processing; in addition, there is a problem of poor surface consistency of the parts after grinding with the existing abrasive belt machine. Summary of the Invention

[0003] The purpose of the present invention is to provide a grinding device to solve the technical problem of poor surface consistency of the parts ground by the abrasive belt machine in the existing technology.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: A grinding device is provided, characterized in that it includes a base frame, an abrasive belt assembly, and a constant force sensor installed on the base frame. The abrasive belt assembly includes a driving wheel, a driven wheel group, a grinding head, and an abrasive belt. The driving wheel and the driven wheel group are respectively rotatably arranged on the base frame. The grinding head is suspended outside the base frame, and the grinding head is connected to the constant force sensor. The abrasive belt is respectively sleeved on the driving wheel, the driven wheel group, and the grinding head. The part of the abrasive belt sleeved on the grinding head is used for grinding. The constant force sensor is used to sense the force condition of the grinding head and perform corresponding expansion and contraction to ensure constant force grinding of the grinding head.

[0005] Optionally, the constant force sensor includes an active contact flange, and the active contact flange is fixed on the base frame, and the output end of the active contact flange is connected to the grinding head.

[0006] Optionally, the base frame includes two vertical plates arranged opposite to each other and at intervals. The constant force sensor is arranged between the two vertical plates; the grinding device includes two abrasive belt assemblies. The driving wheels, driven wheel groups, grinding heads, and abrasive belts of the two abrasive belt assemblies are respectively arranged on the opposite outer sides of the two vertical plates, and the constant force sensor is respectively connected to the two grinding heads.

[0007] Optionally, the grinding device also includes a grinding head bracket, which includes a connecting shaft, a connecting plate and two first mounting plates. The connecting plate is spaced apart from the constant force sensor and is arranged on the same outer side of the two vertical plates. The connecting shaft is connected between the output end of the constant force sensor and the connecting plate. The two first mounting plates are respectively arranged at opposite ends of the connecting plate, and the two grinding heads are respectively arranged on the two connecting plates.

[0008] Optionally, the two sanding belts are respectively a first sanding belt and a second sanding belt, the two sanding heads are respectively a first sanding head and a second sanding head, the width of the first sanding belt is smaller than the width of the second sanding belt, and the outer diameter of the first sanding head is smaller than the outer diameter of the second sanding head.

[0009] Optionally, the grinding device further comprises two sanding belt supporting structures, which are respectively installed between the two vertical plates and are respectively used to stretch the two sanding belts to a preset tension.

[0010] Optionally, the sanding belt supporting structure includes a linear cylinder, a push block and a push rod, the linear cylinder is installed on the vertical plate, the push block is installed on the output end of the linear cylinder, the driven wheel group includes a first driven wheel, the two ends of the push rod are respectively connected to the push block and the first driven wheel, and the pushing direction of the linear cylinder is perpendicular to the axial direction of the first driven wheel.

[0011] Optionally, the sanding belt supporting structure further includes a hydraulic buffer installed on the vertical plate and used for buffering the output force of the linear cylinder.

[0012] Optionally, a cylinder bracket is connected between the two vertical plates, and the two linear cylinders are respectively installed on the cylinder bracket. An extension plate extending along the pushing direction of the linear cylinder is provided in the middle of the cylinder bracket, and an inclined plate is provided at one end of the extension plate away from the cylinder bracket, and each of the oil pressure buffers is respectively installed on the inclined plate.

[0013] Optionally, the grinding device also includes a motor, a first gear, a second gear and a gear shaft, the motor is installed between the two vertical plates, the first gear is connected to the motor shaft of the motor, the second gear is meshingly connected to the first gear, the gear shaft is rotatably arranged between the two vertical plates, the second gear is fixed at the axial middle position of the gear shaft, and the two driving wheels are respectively fixed at the axial ends of the gear shaft and are respectively arranged on the relatively outer sides of the two vertical plates.

[0014] The beneficial effects of the grinding device provided by the present invention are as follows: Compared with the prior art, the grinding device of the present invention includes a constant force sensor and a grinding head. The constant force sensor is arranged on the base frame, the grinding head is suspended outside the base frame, the grinding head is connected to the constant force sensor, and the constant force sensor is used to sense the force received by the grinding head and perform corresponding telescoping to ensure constant force grinding of the grinding head. Thus, when the grinding head receives the thrust of the part, the thrust can be transmitted to the constant force sensor, and the constant force sensor performs corresponding telescoping according to the sensed thrust, so that the thrust received by the grinding head is constant, thereby enabling the grinding head to output a constant grinding force to the part, increasing the flexibility of the entire grinding device, ensuring the consistency of the surface quality of the part, and improving the grinding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a three-dimensional schematic diagram of the grinding device provided by the embodiment of the present invention;

[0017] Figure 2 is a top view schematic diagram of the grinding device provided by the embodiment of the present invention;

[0018] Figure 3 is Figure 1 a schematic diagram of the structure of the grinding device from another angle in

[0019] Figure 4 is Figure 1 a schematic diagram of the structure of the sand belt support structure and the cylinder bracket in

[0020] Among them, the reference numerals in the drawings are as follows:

[0021] 10 - Base frame; 20 - Sand belt assembly; 30 - Constant force sensor; 40 - Sand belt lifting structure; 50 - Driving mechanism; 60 - Third mounting seat; 70 - Grinding head bracket; 80 - Mounting seat; 90 - Cylinder bracket; 11 - First horizontal plate; 12 - Second horizontal plate; 13 - Column; 14 - Vertical plate; 15 - Support rib; 21 - Driving wheel; 22 - Driven wheel set; 23 - Grinding head; 24 - Sand belt; 41 - Linear cylinder; 42 - Pusher block; 43 - Push rod; 44 - Oil buffer; 51 - Motor; 52 - First gear; 53 - Second gear; 54 - Gear shaft; 71 - Connecting shaft; 72 - Connecting plate; 73 - First mounting plate; 74 - Support plate; 75 - Linear bearing; 81 - Second mounting plate; 82 - Third mounting plate; 91 - Fourth mounting plate; 92 - Fifth mounting plate; 93 - Extension plate; 94 - Inclined plate; 121 - Avoidance groove; 221 - First driven wheel; 222 - Second driven wheel; 2211 - Limiting plate. Detailed implementation manner

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. 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.

[0023] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and 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 should not be construed as a limitation to the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0026] Please refer to Figure 1, the grinding device provided by the present invention will be described below. The grinding device is used to grind parts through a sand belt to achieve smooth treatment of the surface of the parts.

[0027] The grinding device includes a base frame 10, a sand belt assembly 20 and a constant force sensor 30. The sand belt assembly 20 and the constant force sensor 30 are both installed on the base frame 10. The sand belt assembly 20 includes a driving wheel 21, a driven wheel group 22, a grinding head 23 and a sand belt 24. The driving wheel 21 and the driven wheel group 22 are respectively rotatably arranged on the base frame 10. The grinding head 23 is suspended outside the base frame 10, and the grinding head 23 is connected to the constant force sensor 30. The sand belt 24 is respectively sleeved on the driving wheel 21, the driven wheel group 22 and the grinding head 23. The part of the sand belt 24 sleeved on the grinding head 23 is used for grinding. The constant force sensor 30 is used to sense the force on the grinding head 23 and perform corresponding telescoping to ensure that the grinding head 23 grinds with a constant force. In this embodiment, the driving wheel 21 is used to be connected to a driving mechanism to form rotation, and the driven wheel group 22 is used to form the transmission of the sand belt 24 together with the driving wheel 21. At the same time, the driven wheel group 22 is used to tension the sand belt 24 to ensure that the sand belt 24 is in a taut state during grinding. The grinding head 23 can drive the sand belt 24 together with the driving wheel 21 and the driven wheel group 22, and the grinding head 23 is used to carry the part when the sand belt 24 grinds the part. When grinding, the part contacts the sand belt 24 and slightly pushes the grinding head 23, thereby pushing the constant force sensor 30. The constant force sensor 30 senses the change in force and thus performs a small amount of telescoping, so as to ensure that the grinding head 23 can grind with a constant force. Specifically, when the grinding force output by the grinding head 23 is small, the constant force sensor 30 performs internal calculation and elongates accordingly to push the grinding head 23 towards the part, thereby correspondingly increasing the grinding force output by the grinding head 23; when the grinding force output by the grinding head 23 is large, the constant force sensor 30 performs internal calculation and shortens accordingly to retract the grinding head 23 away from the part, thereby correspondingly reducing the grinding force output by the grinding head 23.

[0028] The grinding device provided by the present invention includes a constant force sensor 30 and a grinding head 23. The constant force sensor 30 is arranged on the base frame 10. The grinding head 23 is suspended outside the base frame 10. The grinding head 23 is connected to the constant force sensor 30, and the constant force sensor 30 is used to sense the force on the grinding head 23 and perform corresponding telescoping to ensure that the grinding head 23 grinds with a constant force. In this way, when the grinding head 23 is pushed by the part, the thrust can be transmitted to the constant force sensor 30. The constant force sensor 30 performs corresponding telescoping according to the sensed thrust, so that the thrust received by the grinding head 23 is constant, so that the grinding head 23 can output a constant grinding force to the part, increasing the flexibility of the entire grinding device, ensuring the consistency of the surface quality of the part, and improving the grinding quality.

[0029] In this embodiment, please refer to Figure 1, the constant force sensor 30 includes an active contact flange which is fixed to the base frame 10, and the output end of the active contact flange is connected to the grinding head 23. The active contact flange can output a constant force, so as to ensure that the grinding head 23 outputs a constant grinding force, and further ensure the consistency of the surface quality of the part.

[0030] In another embodiment of the present application, the above-mentioned constant force sensor 30 can also be in other forms, such as including a pressure sensor, a circuit board, a driving member and a pushing member. Specifically, the pressure sensor is connected to the grinding head 23 and is used to sense the pressure of the grinding head 23. The circuit board is respectively connected to the pressure sensor and the driving member. The circuit board is used to receive the pressure information transmitted by the pressure sensor and analyze it. The circuit board outputs a control command to the driving member. The pushing member is connected to the grinding head 23, and the driving member drives the pushing member to push or pull the grinding head 23, so as to realize that the grinding head 23 outputs a constant grinding force.

[0031] In this embodiment, please refer to Figure 1 , the base frame 10 includes two vertical plates 14 which are opposite and spaced apart. The constant force sensor 30 is arranged between the two vertical plates 14. The grinding device includes two sand belt assemblies 20. Each sand belt assembly 20 includes a driving wheel 21, a driven wheel group 22, a grinding head 23 and a sand belt 24. The driving wheels 21, the driven wheel groups 22, the grinding heads 23 and the sand belts 24 of the two sand belt assemblies 20 are respectively arranged on the opposite outer sides of the two vertical plates 14. The constant force sensor 30 is respectively connected to the two grinding heads 23. Through the arrangement of the two sand belt assemblies 20, the grinding device can simultaneously grind two different parts of a part or grind two parts at the same time, improving the working efficiency and utilization rate of the grinding device. At the same time, by arranging the two sand belt assemblies 20 on the opposite outer sides of the two vertical plates 14, arranging the constant force sensor 30 between the two vertical plates 14, and the two sand belt assemblies 20 sharing one constant force sensor 30, the structure of the whole grinding device is compact, the occupied volume is small, and the utilization rate is high.

[0032] Specifically, please refer to Figure 1 , the base frame 10 further includes a first horizontal plate 11, a second horizontal plate 12 and four columns 13. The first horizontal plate 11 and the second horizontal plate 12 are parallel and spaced apart in the vertical direction. The four columns 13 are vertically arranged and are respectively connected between the first horizontal plate 11 and the second horizontal plate 12. The first horizontal plate 11 is used to be placed on a horizontal plane. The two vertical plates 14 are respectively vertically arranged on the second horizontal plate 12. Specifically, the two vertical plates 14 are along Figure 1The left - right direction interval in it is arranged on the second horizontal plate 12, and the bottom of each vertical plate 14 is connected to the second horizontal plate 12 through at least two support ribs 15 to enhance the connection strength between the vertical plate 14 and the second horizontal plate 12. In this embodiment, the height of the second horizontal plate 12 is increased by four columns 13, so that the working height of the two sanding belt assemblies 20 is increased, and thus it is convenient for placing and processing parts.

[0033] Please refer to Figures 1 to 3 , the grinding device further includes a driving mechanism 50. Specifically, the driving mechanism 50 includes a motor 51, a first gear 52, a second gear 53 and a gear shaft 54. The motor 51 is installed below the second horizontal plate 12 through a motor base 60. The first gear 52 is installed on the output shaft of the motor 51 and is also located below the second horizontal plate 12. An avoidance groove 121 is opened in the middle of the second horizontal plate 12. Most of the second gear 53 is located above the second horizontal plate 12, and the second gear 53 penetrates through the avoidance groove 121 to be meshed and connected with the first gear 52. The gear shaft 54 is horizontally arranged between the two vertical plates 14, and both ends of the gear shaft 54 are rotatably arranged on the two vertical plates 14 through two bearings. The second gear 53 is fixed at the axial middle position of the gear shaft 54, and the two driving wheels 21 are respectively fixed at the axial two ends of the gear shaft 54 and are respectively arranged on the opposite outer sides of the two vertical plates 14. During operation, the motor 51 drives the first gear 52 to rotate, the first gear 52 drives the second gear 53 to rotate, the second gear 53 drives the gear shaft 54 to rotate, so as to drive the two driving wheels 21 to rotate, and further drive the driven wheel set 22, the grinding head 23 and the sanding belt 24 to move.

[0034] Please refer to Figure 1 , the driven wheel set 22 includes a first driven wheel 221 and four second driven wheels 222. Specifically, the driving wheel 21 is arranged at the position of the vertical plate 14 close to the rear lower part and is fixed on the gear shaft 54. The first driven wheel 221 is rotatably arranged at the position of the vertical plate 14 close to the rear upper part. The four second driven wheels 222 are arranged at the position of the vertical plate 14 close to the front, and the four second driven wheels 222 are roughly trapezoidally distributed. The grinding head 23 is arranged on the front side of the vertical plate 14, and the grinding head 23 is arranged in front of the four driven wheels 222. The sanding belt 24 is wound around the driving wheel 21, the first driven wheel 221, the four second driven wheels 222 and the grinding head 23 in the manner of Figure 1 . During operation, the motor 51 starts, drives the first gear 52, the second gear 52, and the gear shaft 54 to rotate, so as to drive the driving wheel 21 to rotate, and further drive the first driven wheel 221, the four second driven wheels 222, the grinding head 23 and the sanding belt 24 to move.

[0035] In this embodiment, please refer to Figure 1 and Figure 2, the grinding device further includes a grinding head support 70, and the grinding head support 70 includes a connecting shaft 71, a connecting plate 72 and two first mounting plates 73. The connecting plate 72 and the constant force sensor 30 are arranged at intervals along the Figure 2 front-back direction in []. The connecting plate 72 is arranged vertically and is located on the same outer side of the two vertical plates 14. Specifically, the connecting plate 72 is vertically arranged on the front side of the two vertical plates 14. The connecting shaft 71 is connected between the connecting plate 72 and the output end of the constant force sensor 30. The connecting shaft 71 is perpendicular to the connecting plate 72 and extends along the front-back direction. The two first mounting plates 73 are respectively arranged at the opposite ends of the connecting plate 72 in the left-right direction, and the two grinding heads 23 are respectively arranged on the two connecting plates 72. In this way, the thrust received by the two grinding heads 23 can be transmitted to the constant force sensor 30 through the first mounting plates 73, the connecting plate 72 and the connecting shaft 71, and the telescopic movement of the constant force sensor 30 can also be transmitted to the two grinding heads 23 respectively through the connecting shaft 71, the connecting plate 72 and the two first mounting plates 73. In this way, the constant force output of the two grinding heads 23 is realized through the same constant force sensor 30, and the structure is simple, compact and occupies a small volume.

[0036] Please refer to Figure 2 , a support plate 74 is installed between the two vertical plates 14. The support plate 74 is arranged vertically, and a linear bearing 75 is provided at the center of the support plate 74. The support plate 74 is arranged between the constant force sensor 30 and the connecting plate 72. The connecting shaft 71 passes through the linear bearing 75 and is rotatably arranged on the linear bearing 75. In this way, the connecting shaft 71 is supported between the two vertical plates 14 through the linear bearing 75, which ensures the support strength of the connecting shaft 71 and at the same time reduces the resistance of the axial movement of the connecting shaft 71.

[0037] Please refer to Figure 2 , a mounting seat 80 is also installed between the two vertical plates 14. The mounting seat 80 includes a second mounting plate 81 and two third mounting plates 82. The two third mounting plates 82 are respectively attached to the inner sides of the two vertical plates 14. The second mounting plate 81 is connected between the two third mounting plates 82, and the second mounting plate 81 is arranged vertically and is perpendicular to the two vertical plates 14 respectively. The end of the constant force sensor 30 away from the connecting shaft 71 is fixed to the second mounting plate 81.

[0038] In this embodiment, please refer to Figure 1 , Figure 3 and Figure 4The grinding device also includes two sanding belt support structures 40, which are respectively installed between the two vertical plates 14 and are respectively used to stretch the two sanding belts 24 to a preset tension. It should be noted here that the sanding belt 24 needs to maintain an appropriate tension state during grinding. If the sanding belt 24 is too loose, it will cause the sanding belt 24 to slip during the grinding process, and then cause the sanding belt 24 to fail to work normally; if the sanding belt 24 is too tight, it will cause the sanding belt 24 to break during the grinding process, or the sanding belt 24 is always in an overly tight state, resulting in a reduced lifespan. Therefore, the sanding belt 24 needs to be stretched to a preset tension to ensure that the sanding belt 24 can operate normally without breaking or reducing its lifespan. Specifically, the tension of the sanding belt 24 is related to the material, size and running speed of the sanding belt 24, which are not limited here.

[0039] When the grinding device of the present application is initially installed, when the sanding belt 24 is respectively sleeved on the driving wheel 21, the driven wheel group 22 and the grinding head 23, the sanding belt 24 can be supported by the sanding belt support structure 40 to ensure the normal operation of the sanding belt 24. In addition, when the grinding head 23 is grinding, the constant force sensor 30 will be extended and retracted by the reverse thrust of the parts, thereby driving the grinding head 23 to move, so that the sanding belt 24 is relaxed or over-tensioned again. At this time, the sanding belt 24 can also be re-supported by the sanding belt support structure 40 to ensure the normal operation of the sanding belt 24.

[0040] For details, please refer to Figure 2 The two sanding belt support structures 40 are arranged in parallel between the two vertical plates 14 along the left-right direction, and the two sanding belt support structures 40 and the constant force sensor 30 are arranged at intervals along the front-back direction. In this way, the structure of the entire grinding device is compactly installed and occupies a small space.

[0041] In this example, see Figure 3 and Figure 4, the abrasive belt support structure 40 includes a linear cylinder 41, a push block 42 and a push rod 43. The linear cylinder 41 is installed on the vertical plate 14, the push block 42 is installed at the output end of the linear cylinder 41, and both ends of the push rod 43 are respectively connected to the push block 42 and the first driven wheel 221. The length extension direction of the push rod 43 is perpendicular to the pushing direction of the linear cylinder 41, and the length extension direction of the push rod 43 is parallel to the axial direction of the first driven wheel 221, that is, the pushing direction of the linear cylinder 41 is perpendicular to the axial direction of the first driven wheel 221. Thus, the linear cylinder 41 can push the push block 42 and the push rod 43, thereby pushing the first driven wheel 221 to move linearly. Specifically, the linear cylinder 41 is driven by an air pump. When the abrasive belt 24 is in an overly tightened state, the pressure of the abrasive belt 24 on the first driven wheel 221 is greater than the thrust of the linear cylinder 41 on the first driven wheel 221, then the linear cylinder 41 retracts, driving the first driven wheel 221 to move along the retraction direction of the linear cylinder 41, so that the abrasive belt 24 is appropriately relaxed, ensuring that the abrasive belt 24 is in a preset tension state and ensuring that the first driven wheel 221 is in a force balance state; when the abrasive belt 24 is in a slack state, the pressure of the abrasive belt 24 on the first driven wheel 221 is less than the thrust of the linear cylinder 41 on the first driven wheel 221, then the linear cylinder 41 extends linearly, driving the first driven wheel 221 to move along the extension direction of the linear cylinder 41, so that the abrasive belt 24 enters an appropriate pre-tightened state, ensuring that the abrasive belt 24 is always in a preset tension state and ensuring that the first driven wheel 221 is in a force balance state.

[0042] In this embodiment, please refer to Figure 3 , the abrasive belt support structure 40 further includes an oil buffer 44. The oil buffer 44 is installed on the vertical plate 14 and is used to buffer the output force of the linear cylinder 41. During actual operation, when the force of the linear cylinder 41 pushing the push block 42 is too large, the oil buffer 44 will abut against the push block 42 and buffer the driving force, thereby ensuring the smooth operation of the linear cylinder 41 and also limiting the moving distance output by the linear cylinder 41 to a certain extent, preventing the first driven wheel 221 from being pushed too far.

[0043] Please refer to Figure 3 and Figure 4 , a cylinder bracket 90 is installed between the two vertical plates 14, and the two linear cylinders 41 are respectively installed on the cylinder bracket 90. Specifically, the cylinder bracket 90 includes a fourth mounting plate 91 and two fifth mounting plates 92. The two fifth mounting plates 92 are respectively attached to the inner sides of the two vertical plates 14, the fourth mounting plate 91 is connected between the two fifth mounting plates 92, the fourth mounting plate 91 is inclined, the fourth mounting plate 91 is respectively perpendicular to the two vertical plates 14, and the fourth mounting plate 91 is parallel to the pushing directions of the two linear cylinders 41.

[0044] An elongated plate 93 extending along the pushing direction of the linear cylinder 41 is provided in the middle of the cylinder bracket 90. An inclined plate 94 is provided at one end of the elongated plate 93 away from the cylinder bracket 90. Four oil hydraulic buffers 44 are respectively installed on the inclined plate 94. Specifically, one end of the elongated plate 93 is attached to the side of the fourth mounting plate 91 facing away from the two linear cylinders 41. The inclined plate 94 is perpendicularly arranged with the elongated plate 93. The four oil hydraulic buffers 44 are respectively perpendicularly installed on the inclined plate 94, that is, the buffering directions of the four oil hydraulic buffers 44 are parallel to the pushing direction of the linear cylinder 41.

[0045] Further, in this embodiment, the two abrasive belts are respectively a first abrasive belt and a second abrasive belt, and the two grinding heads are respectively a first grinding head and a second grinding head. The width of the first abrasive belt is smaller than that of the second abrasive belt, and the outer diameter of the first grinding head is smaller than that of the second grinding head. The first abrasive belt is sleeved on the first grinding head, and the second abrasive belt is sleeved on the second grinding head. By setting two abrasive belts with different widths, grinding of different part positions can be realized. For example, the second abrasive belt and the second grinding head can be used for grinding operations on planes and free-form surfaces, and the first abrasive belt and the first grinding head can be used for grinding operations on part fillets and corners, thereby enhancing the adaptability of the grinding device to complex part shapes, having a wider application range and more powerful functions.

[0046] Please refer to Figure 1 , in order to prevent the abrasive belt 24 from slipping out of the first driven wheel 221 and the second driven wheel 222 during movement, this embodiment is provided with limit plates 2211 on the first driven wheel 221 and the second driven wheel 222. Specifically, for the first abrasive belt with a smaller width, two limit plates 2211 are provided on the first driven wheel 221 and the second driven wheel 222 along the axial direction. The two limit plates 2211 are arranged at intervals along the axial direction, and the first abrasive belt is limited between the two limit plates 2211; for the second abrasive belt with a larger width, one limit plate 2211 is provided on the first driven wheel 221 and the second driven wheel 222 along the axial direction. The limit plate 2211 is arranged at the outer end of the first driven wheel 221 and the second driven wheel 222 along the axial direction, and the second abrasive belt is limited between the vertical plates 14.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Grinding device, characterized in that, It comprises a base frame, a sanding belt assembly and a constant force sensor installed on the base frame, the sanding belt assembly comprises a driving wheel, a driven wheel group, a grinding head and a sanding belt, the driving wheel and the driven wheel group are respectively rotatably arranged on the base frame, the grinding head is suspended outside the base frame, and the grinding head is connected to the constant force sensor, the sanding belt is respectively sleeved on the driving wheel, the driven wheel group and the grinding head, the part of the sanding belt sleeved on the grinding head is used for grinding, and the constant force sensor is used to sense the force condition of the grinding head and perform corresponding expansion and contraction to ensure constant force grinding of the grinding head; The base frame includes two vertical plates that are opposite to each other and spaced apart, and the constant force sensor is arranged between the two vertical plates; the grinding device includes two abrasive belt assemblies, and the driving wheels, driven wheel groups, grinding heads and abrasive belts of the two abrasive belt assemblies are respectively arranged on the opposite outer sides of the two vertical plates, and the constant force sensor is respectively connected to the two grinding heads; The two sanding belts are respectively a first sanding belt and a second sanding belt, the two sanding heads are respectively a first sanding head and a second sanding head, the width of the first sanding belt is smaller than the width of the second sanding belt, and the outer diameter of the first sanding head is smaller than the outer diameter of the second sanding head; The constant force sensor comprises an active contact flange, the active contact flange is fixed on the base frame, and the output end of the active contact flange is connected to the grinding head; The grinding device also includes a motor, a first gear, a second gear and a gear shaft, the motor is installed between the two vertical plates, the first gear is connected to the motor shaft of the motor, the second gear is meshed with the first gear, the gear shaft is rotatably arranged between the two vertical plates, the second gear is fixed to the axial middle position of the gear shaft, and the two driving wheels are respectively fixed to the axial ends of the gear shaft and are respectively arranged on the relatively outer sides of the two vertical plates.

2. The grinding device according to claim 1, characterized in that, The grinding device also includes a grinding head bracket, which includes a connecting shaft, a connecting plate and two first mounting plates. The connecting plate is spaced apart from the constant force sensor and is arranged on the same outer side of the two vertical plates. The connecting shaft is connected between the output end of the constant force sensor and the connecting plate. The two first mounting plates are respectively arranged at opposite ends of the connecting plate, and the two grinding heads are respectively arranged on the two connecting plates.

3. The grinding device according to claim 2, characterized in that, The grinding device also includes two sanding belt supporting structures, which are respectively installed between the two vertical plates and are used to stretch the two sanding belts to a preset tension.

4. The grinding device according to claim 3, wherein The sanding belt supporting structure includes a linear cylinder, a push block and a push rod. The linear cylinder is installed on the vertical plate, the push block is installed on the output end of the linear cylinder, the driven wheel group includes a first driven wheel, and the two ends of the push rod are respectively connected to the push block and the first driven wheel, and the pushing direction of the linear cylinder is perpendicular to the axial direction of the first driven wheel.

5. The grinding device according to claim 4, wherein The sand belt supporting structure also includes an oil pressure buffer installed on the vertical plate and used for buffering the output force of the linear cylinder.

6. The grinding device according to claim 5, characterized in that, A cylinder bracket is connected between the two vertical plates. The two linear cylinders are respectively installed on the cylinder bracket. An extension plate extending along the pushing direction of the linear cylinder is provided in the middle of the cylinder bracket. An inclined plate is provided at one end of the extension plate away from the cylinder bracket. Each oil buffer is respectively installed on the inclined plate.

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