Multi-degree-of-freedom polishing device for hardware machining

Abstract

The invention relates to the field of grinding devices, in particular to a multi-degree-of-freedom grinding device for hardware machining, which comprises a grab handle mechanism and a grinding ring assembly, the grinding ring assembly comprises grinding mechanisms and universal joints, every two adjacent grinding mechanisms are connected end to end, and the universal joints are connected between every two adjacent grinding mechanisms. A plurality of polishing mechanisms are arranged on the outer surface of the workpiece, the two adjacent polishing mechanisms are staggered, the grab handle mechanism comprises a grab handle shell, a main motor, a bending mechanism and a reset mechanism, the main motor, the bending mechanism and the reset mechanism are located in the grab handle shell, and the output end of the main motor is connected with the polishing mechanisms. And in addition, a spiral line type surrounding mode is adopted, the grinding tool can be wound and hung on the outer surface of the workpiece through spiral surrounding, even if multiple grinding mechanisms are arranged, the situation that a user cannot grind the workpiece due to too heavy weight is avoided, and compared with a traditional mode that the workpiece needs to be held all the time, the mode greatly improves the comfort of the user.

Description

Technical Field

[0001] The present invention relates to the field of grinding devices, and more particularly to a multi-degree-of-freedom grinding device for hardware processing. Background Art

[0002] During the processing of hardware parts, grinding is generally the last step of the entire process. The grinding process mainly adjusts the dimensions of the workpiece more precisely, removes surface burrs, and for some workpieces with requirements for surface gloss, the grinding process is also used. Grinding can be divided into two types: grinding with a grinding machine and manual hand-held equipment. Manual hand-held grinding equipment is more suitable for situations where the surface treatment requirements are not high and the grinding difficulty is low, and it is one of the commonly used equipment in some small workshops or simple processes; In hand-held grinding equipment, the angle and force of grinding are often controlled by people. When the operator grinds different surfaces of a single workpiece, it is often necessary to control the same angle and force as the previous surface. Therefore, it is difficult to control the same force and angle when the grinding surface is changed. And with the increase in workload, it is inevitable that the operator will be difficult to apply the same grinding force due to fatigue. Secondly, the grinding equipment itself also has weight, and workers will unconsciously increase the pressure between the grinding workpiece and the grinding piece due to fatigue when holding it for a long time. In summary, the hand-held grinding equipment in this field still has problems such as uneven grinding force and easy fatigue during the grinding process, resulting in a decline in grinding quality.

[0003] Therefore, technicians in this field have designed a multi-degree-of-freedom grinding device for hardware processing to solve the above problems. Summary of the Invention

[0004] Aiming at the above existing technical deficiencies, the purpose of the present invention is to provide a multi-degree-of-freedom grinding device for hardware processing, which can be adapted to the use of mesh welding with different spacings.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions: It includes a handle mechanism and a grinding ring assembly. The grinding ring assembly includes a plurality of grinding mechanisms and universal joints. Adjacent two grinding mechanisms are connected end to end, and the universal joint is connected between adjacent two grinding mechanisms. There is a dislocation between adjacent two grinding mechanisms. The handle mechanism includes a handle housing and a main motor, a bending mechanism, and a reset mechanism located inside the handle housing. The output end of the main motor is connected to the grinding mechanism.

[0006] Preferably, the grinding mechanism includes a protective shell, a grinding disc, and two mounting brackets. The two mounting brackets are fixedly connected to the inside of the protective shell. The grinding disc is located inside the protective shell and is limited up and down by the mounting brackets. A notch is provided on one side of the protective shell where the grinding disc can protrude outwards.

[0007] Preferably, the grinding mechanisms are also hinged by the connecting shafts at the head and tail ends of adjacent two protective cases, and the head and tail ends of adjacent two grinding mechanisms are distributed in a staggered manner along the axial direction of the connecting shaft. The grinding mechanisms can be rotated relative to each other to make the grinding ring assemblies form a spiral structure.

[0008] Preferably, the bending mechanism includes a sub-motor and a first rope. A winding roller for winding the first rope is connected to the output shaft of the sub-motor. The first rope is connected to the lowermost protective case and penetrates through the remaining protective cases.

[0009] Preferably, the reset mechanism includes a reset wheel and a second rope. The reset wheel is rotatably connected to the handle housing through a torsion spring. The second rope is wound around the outer wall of the reset wheel. The second rope is connected to the lowermost protective case and penetrates through the remaining protective cases.

[0010] Preferably, at least two sets of bending mechanisms and reset mechanisms are provided. The bending mechanisms are located at the two left inner wall corners of the handle housing, and the reset mechanisms are located at the two right inner wall corners of the handle housing. The bending mechanisms are closer to the central axis of the spiral structure of the grinding ring assemblies than the reset mechanisms.

[0011] Preferably, the grinding disc includes a grinding disc body, a connecting shaft, a key block, and a bimetallic strip. Both ends of the connecting shaft are connected to universal joints. The key block is slidably connected up and down through a slot in the center of the connecting shaft. The bimetallic strip is connected between the two key blocks. The grinding disc body is sleeved on the outer wall of the connecting shaft. Key grooves matching the key blocks are provided at the shaft holes of the grinding disc body.

[0012] Preferably, the output end of the main motor is connected to the connecting shaft on the grinding mechanism, and the protective case closest to the handle housing is fixedly connected to the handle housing.

[0013] The beneficial effects of the present invention: The workpiece outer surface is ground by multiple grinding mechanisms, and the surrounding is in a spiral winding manner; First, the spiral winding allows the grinding tools to be wound and suspended on the outer surface of the workpiece. Even if there are many grinding mechanisms, the user will not be unable to grind due to excessive weight. Compared with the traditional way of holding the grinding piece all the time, this way greatly improves the comfort of the user; Second, the spiral winding can also more conveniently apply uniform pressure to each grinding point. When it is necessary to increase the grinding pressure, only the winding amount of the first rope needs to be increased. The more the first rope is wound, the closer the spiral winding is to the workpiece surface, and the greater the applied pressure. This solves the problem in existing grinding that the user applies the grinding pressure by himself, resulting in changes in the grinding effect due to different pressure magnitudes on different surfaces; Thirdly, the spiral winding can also adapt to workpieces with more different diameters. When the diameter of the workpiece is relatively large, the number of grinding mechanisms can be increased. When the diameter of the workpiece is relatively small, the spiral winding method does not require the user to adjust the number of grinding mechanisms again. Therefore, more workpieces can be applicable. Fourthly, this equipment can also avoid over-grinding. A bimetallic strip is adopted inside the grinding disc. When the temperature is relatively high due to continuous grinding, the bending of the bimetallic strip can cause the key block to disengage from the keyway of the grinding disc body, and the rotational kinetic energy of the main motor cannot be transmitted continuously, causing the grinding disc to decelerate or stop rotating, thus avoiding affecting the quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below 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.

[0015] Figure 1 It is a top view structural schematic diagram of the present invention.

[0016] Figure 2 It is a front view structural schematic diagram of the present invention.

[0017] Figure 3 It is a schematic diagram of the present invention in a bent state.

[0018] Figure 4 It is a side view structural schematic diagram of the present invention.

[0019] Figure 5 It is of the present invention Figure 2 Partial enlarged structural schematic diagram.

[0020] Figure 6 It is a structural schematic diagram of the grinding disc of the present invention. In the figure: Handle mechanism; 1a, handle housing; 1b, main motor; 1c, bending mechanism; 1c1, sub-motor; 1c2, rope one; 1d, reset mechanism; 1d1, reset wheel; 1d2, rope two; 2, grinding ring assembly; 2a, grinding mechanism; 2a1, protective shell; 2a2, grinding disc; 2a21, grinding disc body; 2a22, connecting shaft; 2a23, key block; 2a24, bimetallic strip; 2a3, mounting bracket; 2b, universal joint. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions of the present invention will be further described below with reference to the drawings and through specific embodiments.

[0022] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams rather than actual pictures, and should not be construed as a limitation on this patent; in order to better illustrate the embodiments of the present invention, some components in the accompanying drawings are omitted, enlarged or reduced, which do not represent the dimensions of actual products; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0023] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. This 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. Therefore, the terms used to describe the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] In the description of the present invention, unless otherwise clearly specified and defined, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1: The present invention provides a multi-degree-of-freedom grinding device for hardware processing, as Figures 1-6As shown in the figure, it includes a handle mechanism 1 and a grinding ring assembly 2. The grinding ring assembly 2 includes a plurality of grinding mechanisms 2a and universal joints 2b. Adjacent two grinding mechanisms 2a are connected end to end, and the universal joint 2b is connected between adjacent two grinding mechanisms 2a. There is a dislocation between adjacent two grinding mechanisms 2a. The handle mechanism 1 includes a handle housing 1a and a main motor 1b, a bending mechanism 1c, and a reset mechanism 1d located inside the handle housing 1a. The output end of the main motor 1b is connected to the grinding mechanism 2a. The grinding mechanism 2a includes a protective housing 2a1, a grinding disc 2a2, and two mounting brackets 2a3. The two mounting brackets 2a3 are fixedly connected to the inner side of the protective housing 2a1. The grinding disc 2a2 is located inside the protective housing 2a1 and is limited up and down by the mounting brackets 2a3. A notch is provided on one side of the protective housing 2a1 through which the grinding disc 2a2 can protrude outward. Four or more grinding mechanisms 2a need to be provided. Adjacent two grinding mechanisms 2a are connected end to end to form a long chain structure. The mounting brackets 2a3 and the protective housing 2a1 jointly limit and protect the grinding disc 2a2. At the same time, only one side of the protective housing 2a1 is provided with a notch, so that the grinding disc 2a2 protrudes out of the outer side of the protective housing 2a1. The grinding disc 2a2 can perform grinding by rotating and contacting the workpiece.

[0026] The grinding mechanisms 2a are also hinged through the connecting shafts at the head and tail ends of adjacent two protective housings 2a1. The head and tail ends of adjacent two grinding mechanisms 2a are staggered along the axial direction of the connecting shaft. The grinding mechanisms 2a can be rotated relative to each other to make the grinding ring assembly 2 in a spiral structure. When the grinding ring assembly 2 forms a surrounding structure by bending, due to the horizontal dislocation between the grinding mechanisms 2a, the grinding mechanism 2a at the head end will not contact the handle mechanism 1 at the tail end, but surround the outside of the workpiece in a spiral form. The spiral surrounding can be wound around the outside of the workpiece, and the user does not need to keep holding the posture all the time, which is convenient for operation.

[0027] The bending mechanism 1c includes a sub-motor 1c1 and a first rope 1c2. A winding roller for winding the first rope 1c2 is connected to the output shaft of the sub-motor 1c1. The first rope 1c2 is connected to the protective housing 2a1 at the outermost end and passes through the other protective housings 2a1. After the sub-motor 1c1 is started, the first rope 1c2 is continuously wound by the winding roller, so that the first rope 1c2 pulls the grinding mechanism 2a at the farthest end, prompting the grinding ring assembly 2 to change from a straight state to a bent circular arc state. As the winding amount of the first rope 1c2 increases, the circular arc state will gradually change to a spiral state.

[0028] The reset mechanism 1d includes a reset wheel 1d1 and a second rope 1d2. The reset wheel 1d1 is rotationally connected to the handle housing 1a through a torsion spring. The second rope 1d2 is wound around the outer wall of the reset wheel 1d1. The second rope 1d2 is connected to the outermost protective shell 2a1 and passes through the remaining protective shells 2a1. When the grinding ring assembly 2 needs to change from a spiral or bent shape to a straight shape, only need to let the auxiliary motor 1c1 continuously release the wound first rope 1c2 outward, and the reset wheel 1d1 starts to wind the second rope 1d2 in the reverse direction, so that the second rope 1d2 pulls the outermost protective shell 2a1, and pushes the grinding ring assembly 2 to reset from a bent or spiral shape to a straight shape.

[0029] At least two sets of bending mechanisms 1c and reset mechanisms 1d are provided. The bending mechanisms 1c are located at two corners on the left inner wall of the handle housing 1a, and the reset mechanisms 1d are located at two corners on the right side of the handle housing 1a. The bending mechanism 1c is closer to the central axis of the spiral structure of the grinding ring assembly 2 than the reset mechanism 1d. The bending mechanism 1c and the reset mechanism 1d are the left and right balance structures of the grinding ring assembly 2. At least two sets can avoid front and rear offsets during bending, resulting in an unstable bending shape.

[0030] The output end of the main motor 1b is connected to the connecting shaft 2a22 on the grinding mechanism 2a. The protective shell 2a1 closest to the handle housing 1a is fixedly connected to the handle housing 1a. The main motor 1b directly drives the grinding disc 2a2 on one grinding mechanism 2a. The universal joint 2b is responsible for the transmission between the grinding discs 2a2, so that the main motor 1b drives multiple grinding discs 2a2 to jointly perform a dead-angle-free grinding on the workpiece.

[0031] Embodiment 2 is different from Embodiment 1 in that: the grinding disc 2a2 includes a grinding disc body 2a21, a connecting shaft 2a22, a key block 2a23 and a bimetallic strip 2a24. Both ends of the connecting shaft 2a22 are connected to the universal joint 2b. The key block 2a23 is slidably connected up and down through a slot in the center of the connecting shaft 2a22. A bimetallic strip 2a24 is connected between the two key blocks 2a23. The outer wall of the connecting shaft 2a22 is sleeved with the grinding disc body 2a21. A key slot matching the key block 2a23 is provided at the shaft hole of the grinding disc body 2a21. As the grinding time increases, the temperature of the grinding disc 2a2 and the workpiece rises, and the heat will be transferred from the grinding disc body 2a21 to the bimetallic strip 2a24 on the connecting shaft 2a22. The bimetallic strip 2a24 is made of two metals with different expansion coefficients. When the temperature is too high, the bimetallic strip 2a24 will bend directionally, thereby pulling the key blocks 2a23 at both ends to gradually approach and be received in the groove of the connecting shaft 2a22, so that the casting of the grinding disc body 2a21 decelerates or stops rotating, which can be used to prevent over-grinding. Working principle: When in use, place this device close to the outer wall of the columnar grinding piece, and then turn on the auxiliary motor 1c1 in the device to continuously wind the first rope 1c2. As a result, the second rope 1d2 is forced to continuously release its length outward. The first rope 1c2 continuously contracts and pulls the grinding mechanism 2a at the outermost end, causing the grinding ring assembly 2 composed of multiple grinding mechanisms 2a to gradually change from a straight state to a bent state. As the first rope 1c2 is continuously wound, the grinding ring assembly 2 also gradually changes from a bent state to a spiral structure, allowing multiple grinding mechanisms 2a to wind around the outer wall of the workpiece to be ground in a spiral manner. The more the first rope 1c2 is wound, the tighter the grinding ring assembly 2 is wound, and the greater the pressure on the surface of the workpiece to be ground. When resetting, only need to let the auxiliary motor 1c1 continuously release the first rope 1c2 outward, and the reset wheel 1d1 on the other side will continuously wind the stretched second rope 1d2 under the action of the torsion spring, prompting the entire grinding ring assembly 2 to gradually return from the bent spiral state to the straight state; When grinding, start the main motor 1b, which can drive the grinding discs 2a2 on multiple grinding mechanisms 2a to rotate. The spiral winding structure can perform all-round and non dead-angle grinding on the surface of the workpiece. During the grinding process, the user does not need to apply pressure to the device to improve the grinding effect, but only needs to increase the winding amount of the first rope 1c2. Moreover, the user only needs to move this device horizontally to increase the overall grinding area; When excessive grinding occurs, since the grinding time continuously increases, the temperature of the grinding disc 2a2 and the workpiece will continuously rise. The heat will be transferred through the grinding disc body 2a21 to the bimetallic strip 2a24 on the connecting shaft 2a22. The bimetallic strip 2a24 is made of two metals with different expansion coefficients. When the temperature is too high, the bending amplitude increases, causing the key block 2a23 to gradually approach and be received in the groove of the connecting shaft 2a22, disengaging from the keyway of the grinding disc body 2a21, so that the grinding disc body 2a21 can no longer rotate, achieving temperature control and avoiding the situation of excessive grinding of the workpiece. It should be stated that the above specific implementation manners are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can also be made to the present invention. However, as long as these transformations do not deviate from the spirit of the present invention, they should be within the protection scope of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A multi-degree-of-freedom grinding device for hardware processing, characterized in that, It includes a handle mechanism (1) and a grinding ring assembly (2). The grinding ring assembly (2) includes a plurality of grinding mechanisms (2a) and universal joints (2b). Adjacent two grinding mechanisms (2a) are connected end to end, and the universal joint (2b) is connected between adjacent two grinding mechanisms (2a). There is a dislocation between adjacent two grinding mechanisms (2a). The handle mechanism (1) includes a handle housing (1a) and a main motor (1b), a bending mechanism (1c), and a reset mechanism (1d) located inside the handle housing (1a). The output end of the main motor (1b) is connected to the grinding mechanism (2a).

2. The multi-degree-of-freedom grinding device for hardware processing according to claim 1, wherein, The grinding mechanism (2a) includes a protective shell (2a1), a grinding disc (2a2), and two mounting brackets (2a3). The two mounting brackets (2a3) are fixedly connected to the inner side of the protective shell (2a1). The grinding disc (2a2) is located inside the protective shell (2a1) and is limited up and down by the mounting brackets (2a3). A notch is provided on one side of the protective shell (2a1) where the grinding disc (2a2) can protrude outwards.

3. The multi-degree-of-freedom grinding device for hardware processing according to claim 2, wherein, The grinding mechanisms (2a) are also hinged through connecting shafts at the head and tail ends of adjacent two protective shells (2a1). The head and tail ends of adjacent two grinding mechanisms (2a) are distributed in a staggered manner along the axial direction of the connecting shaft. The grinding mechanisms (2a) can be rotated pairwise to make the grinding ring assembly (2) in a spiral structure.

4. The multi-degree-of-freedom grinding device for hardware processing according to claim 1, wherein, The bending mechanism (1c) includes a sub-motor (1c1) and a first rope (1c2). A winding roller for winding the first rope (1c2) is connected to the output shaft of the sub-motor (1c1). The first rope (1c2) is connected to the outermost protective shell (2a1) and passes through the remaining protective shells (2a1).

5. The multi-degree-of-freedom grinding device for hardware processing according to claim 2, characterized in that, The reset mechanism (1d) includes a reset wheel (1d1) and a second rope (1d2). The reset wheel (1d1) is rotatably connected to the handle housing (1a) through a torsion spring. The second rope (1d2) is wound around the outer wall of the reset wheel (1d1). The second rope (1d2) is connected to the outermost protective shell (2a1) and passes through the remaining protective shells (2a1).

6. The multi-degree-of-freedom grinding device for hardware processing according to claim 1, wherein, Both the bending mechanism (1c) and the reset mechanism (1d) are provided with at least two groups. The bending mechanism (1c) is located at two inner corners on the left side of the handle housing (1a), and the reset mechanism (1d) is located at two inner corners on the right side of the handle housing (1a). The bending mechanism (1c) is closer to the central axis of the spiral structure of the grinding ring assembly (2) than the reset mechanism (1d).

7. The multi-degree-of-freedom grinding device for hardware processing according to claim 2, characterized in that, The grinding disc (2a2) includes a grinding disc body (2a21), a connecting shaft (2a22), a key block (2a23), and a bimetallic strip (2a24). Both ends of the connecting shaft (2a22) are connected to the universal joint (2b). The key block (2a23) is slidably connected up and down through a slot in the center of the connecting shaft (2a22). A bimetallic strip (2a24) is connected between the two key blocks (2a23). The outer wall of the connecting shaft (2a22) is sleeved with the grinding disc body (2a21). Key grooves matching the key blocks (2a23) are provided at the shaft hole of the grinding disc body (2a21).

8. The multi-degree-of-freedom grinding device for hardware processing according to claim 7, characterized in that, The output end of the main motor (1b) is connected to the connecting shaft (2a22) on the grinding mechanism (2a), and the protective housing (2a1) closest to the handle housing (1a) is fixedly connected to the handle housing (1a).

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