Tool for grinding through hole of cabinet body

Abstract

A tool for polishing a through hole in a cabinet comprises a mounting rod, a polishing assembly and a limiting assembly. A connecting shaft is vertically arranged at the midpoint of the top surface of the mounting rod and is connected with a driving motor; the grinding assembly comprises sliding blocks arranged on the mounting rod, the sliding blocks are movably arranged in the length direction of the mounting rod, each sliding block is provided with a rotating shaft parallel to the connecting shaft in a penetrating mode, a grinding head is coaxially arranged at the lower end of each rotating shaft and located below the mounting rod, an annular groove with the section of a V-shaped structure is formed in the circumferential outer wall of each grinding head, and an eccentric hammer is arranged on one side of each rotating shaft. The two groups of polishing assemblies are symmetrically arranged at the two ends of the mounting rod; the limiting assembly comprises a hinge block, the two ends of the hinge block are connected with the sliding blocks at the two ends in a hinged mode through hinge rods with the same size, and more specifically, a guide rod is arranged at the top of the hinge block and coaxially penetrates through the connecting shaft. According to the scheme, the inner side edge and the outer side edge of the through hole in the cabinet body can be polished at the same time, and the operation mode is simple.

Description

Technical Field

[0001] The present invention belongs to the technical field of grinding tools, and particularly relates to a tool for grinding through holes on a cabinet body. Background Art

[0002] During the installation and construction process of cabinets such as distribution boxes and electrical control cabinets, it is often necessary to temporarily process through holes on the cabinet body for threading cables. Since the through holes are mainly processed using handheld drilling tools at the installation site, there are usually burrs on the edges of the drilled through holes. The existing treatment method is to use a handheld motor to drive a grinding wheel head to grind the edges of the through holes. However, in the existing method, not only does it require manually controlling the grinding head to move in a circular motion along the inner edge of the through hole during grinding, making the operation process more complex, but also it can only effectively grind the edges of the through holes on the outer side of the cabinet body, and cannot effectively grind the edges of the through holes on the inner side of the cabinet body. Summary of the Invention

[0003] To solve the deficiencies of the prior art, the present invention provides a tool for grinding through holes on a cabinet body, which can simultaneously grind the inner and outer edges of the through holes on the cabinet body, and has a simple operation method.

[0004] To achieve the purpose of the present invention, the following scheme is proposed: A tool for grinding through holes on a cabinet body, comprising: a mounting rod, a grinding assembly, and a limiting assembly.

[0005] A connecting shaft is vertically provided at the midpoint of the top surface of the mounting rod for connecting a driving motor; The grinding assembly includes sliders provided on the mounting rod. The sliders are movably arranged along the length direction of the mounting rod. Each slider is provided with a rotating shaft parallel to the connecting shaft. A grinding head is coaxially provided at the lower end of the rotating shaft. The grinding head is located below the mounting rod. The circumferential outer wall of the grinding head has an annular groove with a V-shaped cross-section. An eccentric hammer is provided on one side of the rotating shaft. The number of grinding assemblies is two groups, symmetrically arranged at both ends of the mounting rod; The limiting assembly includes a hinge block. Both ends of the hinge block are hinged to the sliders at both ends through a hinge rod of the same size. More specifically, a guide rod is provided at the top of the hinge block, and the guide rod is coaxially penetrated through the connecting shaft.

[0006] The beneficial effects of the present invention are as follows: 1. This solution can simultaneously grind the inner and outer edges of the through holes opened on the cabinet body, solves the problem that the inner edge of the through hole cannot be ground in the prior art, and has a simple operation method; 2. This solution uses centrifugal force to drive the grinding assembly to move outward, and is limited by the inner diameter of the through hole, so that this solution can adapt to the grinding of through holes with different inner diameters. Brief Description of the Drawings

[0007] The accompanying drawings described herein are only for illustrating selected embodiments and not all possible implementation schemes, let alone intended to limit the scope of the present invention.

[0008] Figure 1 A schematic diagram of a working state of the present application is shown.

[0009] Figure 2 A schematic diagram of the bottom structure of the grinding tool of the present application is shown.

[0010] Figure 3 A schematic diagram of the top structure of the grinding tool of the present application is shown.

[0011] Figure 4 A sectional view of the grinding tool of the present application is shown.

[0012] Figure 5 An exploded view of the structure of the grinding assembly is shown.

[0013] Figure 6 A schematic diagram of the structure of the grinding head is shown.

[0014] Reference numerals in the figure: mounting rod - 1, connecting shaft - 11, long slot - 12, long slot - 12, grinding assembly - 2, slider - 21, rotating shaft - 22, grinding head - 3, body - 31, strip slot - 311, grinding sheet - 32, rubber ring - 33, eccentric assembly - 4, eccentric hammer - 41, ring - 42, arc track - 43, movable hammer head - 44, spring - 45, limit assembly - 5, hinge block - 51, hinge rod - 52, guide rod - 53. Detailed implementation manners

[0015] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following describes the implementation manners of the present invention in detail with reference to the accompanying drawings. However, the embodiments described herein are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0016] It should be noted that: similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0017] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description. The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. The terms "parallel", "perpendicular", etc. do not mean that the components are required to be absolutely parallel or perpendicular, but can be slightly inclined.

[0018] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside 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.

[0019] As Figures 1 to 5 shown, a tool for grinding through holes on a cabinet body includes: a mounting rod 1, a grinding assembly 2, and a limiting assembly 5.

[0020] Specifically, as Figures 2 to 4 shown, a connecting shaft 11 is vertically provided at the midpoint of the top surface of the mounting rod 1 for connecting a driving motor.

[0021] Specifically, as Figures 2 to 5 shown, the grinding assembly 2 includes a slider 21 provided on the mounting rod 1. The slider 21 is movably arranged along the length direction of the mounting rod 1. A rotating shaft 22 parallel to the connecting shaft 11 is passed through each slider 21. A grinding head 3 is coaxially provided at the lower end of the rotating shaft 22. The grinding head 3 is located below the mounting rod 1. The circumferential outer wall of the grinding head 3 has an annular groove with a V-shaped cross-section. An eccentric hammer 41 is provided on one side of the rotating shaft 22. The number of the grinding assemblies 2 is two groups, symmetrically arranged at both ends of the mounting rod 1. Here, the symmetry can also be understood in the specific structure as that the two groups of grinding assemblies 2 are symmetrically arranged with respect to the connecting shaft 11 in the length direction of the mounting rod 1. And here, the symmetry also means that the two grinding heads 3 are also symmetrically arranged, and the structures of the two grinding heads 3 are the same, and the cross-sectional dimensions of the annular groove and its positions on the grinding head 3 are the same.

[0022] Specifically, as Figure 2 、 Figure 4 shown, the limiting assembly 5 includes a hinge block 51. Both ends of the hinge block 51 are hinged to the sliders 21 at both ends through a hinge rod 52 with the same size. More specifically, the axes of each hinge are perpendicular to the connecting shaft 11 and the mounting rod 1. A guide rod 53 is provided at the top of the hinge block 51. The guide rod 53 is coaxially passed through the connecting shaft 11.

[0023] When grinding the through holes on the cabinet body, first install the grinding tool on the driving motor through the connecting shaft 11. Specifically, a handheld electric drill with forward and reverse rotation functions can be selected as the driving motor. Then insert both grinding heads 3 into the through holes, and make the cabinet board where the through hole is located be within the range of the annular groove of the grinding head 3 along the wall thickness direction. Precise positioning is not required here, and it is not necessary to make the edge of the through hole be at the root of the annular groove. Start the driving motor to drive the grinding tool to rotate around the connecting shaft 11. When the driving tool rotates, it will generate a centrifugal force on the grinding assembly 2, causing the two sets of grinding assemblies 2 to move towards both ends of the mounting rod 1 respectively until the annular groove of the grinding head 3 contacts the edge of the through hole. Restricted by the edge of the through hole, the grinding assembly 2 will stop moving towards both ends of the mounting rod 1, and the mounting rod 1 will drive the two sets of grinding assemblies 2 to make a circular motion along the edge of the through hole. In an ideal state, the grinding head 3 will roll on the edge of the through hole, which will cause no relative circular movement between the outer wall of the grinding head 3 and the edge of the through hole. Because there is no relative movement between the grinding head 3 and the edge of the through hole, the purpose of grinding the edge of the through hole cannot be effectively achieved. Although this ideal state cannot be maintained for a long time, it will still affect the grinding efficiency. In this solution, by setting the eccentric hammer 41, when the grinding head 3 rotates along the edge of the through hole, the inertia of the eccentric hammer 41 is used to break this ideal state, so that the rotating shaft 22 rotates faster under the action of the eccentric hammer 41, thereby creating a speed difference between the grinding head 3 and the edge of the through hole, so that relative movement occurs between the outer wall of the grinding head 3 and the edge of the through hole, thus achieving the purpose of grinding.

[0024] In actual use, to prevent the phenomenon that the grinding head 3 rolls on the edge of the through hole from occurring, the rotation direction of the driving motor can be randomly switched, so that the rotation direction of the grinding head 3 is switched at any time, and the rotation speed and rotation direction of the grinding head 3 are in a changing state at all times. Subsequently, it further ensures that a speed difference is formed between the grinding head 3 and the edge of the through hole to ensure the grinding effect. And the impact force generated by inertia at the moment of switching the rotation direction of the grinding head 3 can also further improve the grinding effect. And during specific grinding, no matter which direction the grinding head 3 rotates, as long as the ideal state is broken and there is relative rotation between the grinding head 3 and the edge of the through hole, the purpose of grinding can be achieved. Rotating a full circle around the rotating shaft 22 or swinging around the rotating shaft 22 can be understood as relative rotation.

[0025] During the process of the grinding tool rotating to make the grinding assemblies 2 move towards both ends of the mounting rod 1, the two articulated rods 52 will expand towards both ends. At this time, the articulated block 51 will be moved. Since the articulated block 51 is restricted by the top guide rod 53, the articulated block 51 can only move along the axis direction of the connecting shaft 11 following the guide rod 53, so that the opening angles of the two articulated rods 52 are the same, ensuring that the moving distances of the two groups of grinding assemblies 2 towards both ends of the mounting rod 1 are the same, and enabling the two groups of grinding assemblies 2 to always maintain a symmetrical state relative to the connecting shaft 11, so as to prevent the two groups of grinding assemblies 2 from presenting an asymmetrical state and affecting the smoothness of the grinding tool.

[0026] In this solution during grinding, there is no requirement for coaxiality between the connecting shaft 11 and the through-hole. When coaxial, both groups of grinding assemblies 2 can simultaneously grind the through-hole. Even when not coaxial, at least one of the groups of grinding assemblies 2 always maintains a state of grinding the through-hole. During grinding, by manually controlling the driving motor to drive the grinding tool to reciprocate along the axis direction of the through-hole, the arc-shaped grooves on the outer wall of the grinding head 3 can be used to grind the inner and outer edges of the through-hole, and there is no need to manually move the grinding tool along the edge of the through-hole, making the grinding process simpler; at the same time, the centrifugal force enables the grinding head 3 to always maintain a state of contacting the edge of the through-hole, avoiding interruption of grinding.

[0027] After grinding is completed, stop the driving motor and push one of the groups of grinding assemblies 2 towards the middle by hand, then the two groups of grinding assemblies 2 can be simultaneously retracted towards the middle, facilitating the removal of the grinding tool from the through-hole; when used to grind a horizontally placed through-hole downward, under the action of the gravity of the limiting assembly 5, the two groups of grinding assemblies 2 can be driven by the articulated rods 52 to automatically close towards the middle, making it more convenient to remove the grinding tool.

[0028] Preferably, as Figure 2 、 Figure 3 shown, a T-shaped groove is provided along the length direction at the bottom of the mounting rod 1, and the cross-sectional profile of the slider 21 matches the T-shaped groove, and the slider 21 is slidably arranged in the T-shaped groove.

[0029] As another preferred structure, the mounting rod 1 is of a round rod structure, and its two ends respectively pass through two sliders 21; to reduce the friction between the slider 21 and the T-shaped groove, rollers can be provided at the bottom, top and both sides of the slider 21, and the rollers are in rolling contact with the inner wall of the T-shaped groove, using rolling friction to replace the sliding friction between the slider 21 and the T-shaped groove.

[0030] Preferably, when the two articulated rods 52 are in a straight line, the distance between the two sliders 21 is less than or equal to the length of the mounting rod 1 to prevent the slider 21 from separating from the end of the mounting rod 1.

[0031] Preferably, as Figure 6As shown, the grinding head 3 includes a cylindrical body 31, and grinding discs 32 are arranged on the outer side of the body 31 in a circumferential array. The middle sections of the outer edges of the grinding discs 32 all have V-shaped grooves, so that an annular groove on the outer side of the grinding head 3 is formed by the V-shaped grooves on the outer sides of multiple grinding discs 32. For a traditional grinding head, its outer wall is a continuous surface, and it mainly realizes grinding by means of high-speed rotation. Compared with the traditional grinding head, in this solution, through the array arrangement of the grinding discs 32, the working surface of the outer wall of the grinding head 3 forms a discontinuous structure. When the outer wall of the grinding head 3 contacts the edge of the through hole, each grinding disc 32 will contact the edge of the through hole in an impact manner, so as to remove the flash and burrs at the edge of the through hole by scraping. Therefore, the grinding head 3 does not need to rotate at a high speed, and the purpose of grinding and removing flash and burrs can also be achieved.

[0032] Preferably, the grinding discs 32 are installed on the body 31 in a detachable manner, so as to be replaced individually, thereby reducing the replacement cost of the grinding head 3. The specific installation structure of the grinding discs 32 is as Figure 6 shown. A strip-shaped groove 311 parallel to the axis is formed on the outer side of the body 31. The two ends of the strip-shaped groove 311 do not penetrate the end surface of the body 31. The strip-shaped grooves 311 are arranged in a circumferential array at multiple places. Each strip-shaped groove 311 is provided with a grinding disc 32. Rubber rings 33 are sleeved on both ends of the body 31, and the rubber rings 33 press both ends of the grinding disc 32 in the strip-shaped groove 311. Further preferably, the grinding head 3 is pressed on the lower end of the rotating shaft 22 by a nut.

[0033] Preferably, as Figure 5 shown, the eccentric hammer 41 is arranged on the ring 42 of an eccentric assembly 4, and the ring 42 and the eccentric hammer 41 are connected by a cantilever. The ring 42 is coaxially and detachably arranged on the rotating shaft 22, so as to facilitate the manufacture and installation of the rotating shaft 22. The circumferential positions of the ring 42 and the rotating shaft 22 are constant. The eccentric assembly 4 and the grinding head 3 are arranged axially offset along the rotating shaft 22 to prevent the eccentric assembly 4 from affecting the grinding work of the grinding head 3.

[0034] Preferably, as Figure 5As shown in the figure, an arc-shaped track 43 is coaxially provided on the outer side of the circular ring 42. A movable hammer head 44 is slidably provided on the arc-shaped track 43. The weight of the movable hammer head 44 is less than that of the eccentric hammer 41, and the distance between the movable hammer head 44 and the axis of the circular ring 42 is less than the distance between the eccentric hammer 41 and the axis of the circular ring 42. The purpose of setting the eccentric hammer 41 is to increase the eccentric force, and use the inertia generated by the eccentric force to improve the rotation of the rotating shaft 22, so as to prevent the grinding head 3 from rolling on the edge of the through hole. However, since the eccentric hammer 41 is located on a constant side of the rotating shaft 22, and in this solution, adding the movable hammer head 44 can increase the randomness of the force on the rotation of the rotating shaft 22. The movable hammer head 44 can slide on the arc-shaped track 43 during the rotation of the rotating shaft 22, and follow the change of the rotation direction of the grinding tool. The movable hammer head 44 will also change its position on the arc-shaped track 43, further preventing the grinding head 3 from rolling on the edge of the through hole.

[0035] Further preferably, as Figure 5 shown in the figure, springs 45 are sleeved at both ends of the arc-shaped track 43 to reduce the impact of the movable hammer head 44 on both ends of the arc-shaped track 43. On the other hand, during the grinding process, when the movable hammer head 44 moves towards one of the springs 45, this spring 45 will generate an elastic force on the movable hammer head 44, thereby pushing the movable hammer head 44 to move towards the other spring 45, so as to increase the activity frequency of the movable hammer head 44 on the arc-shaped track 43, making the circumferential force on the rotating shaft 22 constantly change, and further preventing the grinding head 3 from rolling on the edge of the through hole.

[0036] Preferably, as Figure 3 、 Figure 4 shown in the figure, the eccentric hammer 41 is arranged at the upper end of the rotating shaft 22. Long strip holes 12 penetrating the bottom surface and the top surface are opened at both ends of the mounting rod 1 along the length direction. The rotating shaft 22 passes through the long strip holes 12, and the eccentric hammer 41 is located above the mounting rod 1.

[0037] The above are only the preferred embodiments of the present invention, and do not represent the only or limit the present invention. Those skilled in the art should understand that without departing from the scope of the present invention, various changes or equivalent replacements made to the present invention all fall within the scope of protection of the present invention.

Claims

1. A tool for grinding through holes on a cabinet body, characterized in that, Comprising: An installation rod (1), at the midpoint of the top surface of which a connecting shaft (11) is vertically provided for connecting a driving motor; A grinding assembly (2), including a slider (21) provided on the installation rod (1), the slider (21) is movably arranged along the length direction of the installation rod (1), a rotating shaft (22) parallel to the connecting shaft (11) is respectively penetrated through the sliders (21), a grinding head (3) is coaxially provided at the lower end of the rotating shaft (22), the grinding head (3) is located below the installation rod (1), the circumferential outer wall of the grinding head (3) has an annular groove with a V-shaped cross-section, an eccentric hammer (41) is provided on one side of the rotating shaft (22), and the number of the grinding assemblies (2) is two groups, symmetrically arranged at both ends of the installation rod (1); A limiting assembly (5), including a hinge block (51), both ends of which are respectively hinged to the sliders (21) at both ends through a hinge rod (52) with the same size. More specifically, a guide rod (53) is provided at the top of the hinge block (51), and the guide rod (53) is coaxially penetrated through the connecting shaft (11).

2. The tool for grinding through holes on a cabinet body according to claim 1, characterized in that, A T-shaped groove is opened along the length direction at the bottom of the installation rod (1), and the slider (21) is slidably arranged in the T-shaped groove.

3. A tool for polishing through holes on a cabinet body according to claim 1, characterized in that When the two hinge rods (52) are in a straight line, the distance between the two sliders (21) is less than or equal to the length of the installation rod (1).

4. A tool for polishing through holes on a cabinet body according to claim 1, characterized in that, The grinding head (3) includes a cylindrical body (31), and grinding sheets (32) are arranged in a circumferential array on the outer side thereof. The middle sections of the outer edges of the grinding sheets (32) all have V-shaped grooves.

5. A tool for polishing through holes on a cabinet body according to claim 4, characterized in that, A strip-shaped groove (311) parallel to the axis is opened on the outer side of the body (31), the two ends of the strip-shaped groove (311) do not penetrate the end surface of the body (31), the strip-shaped grooves (311) are arranged in a circumferential array at multiple places, and grinding sheets (32) are respectively arranged in each strip-shaped groove (311). Rubber rings (33) are respectively sleeved at both ends of the body (31), and the two ends of the grinding sheets (32) are pressed in the strip-shaped grooves (311) by the rubber rings (33).

6. A tool for polishing through holes on a cabinet body according to claim 1, characterized in that, The eccentric hammer (41) is provided on a ring (42) of an eccentric assembly (4), and the ring (42) and the eccentric hammer (41) are connected by a cantilever. The ring (42) is coaxially and detachably arranged on the rotating shaft (22), the circumferential positions of the ring (42) and the rotating shaft (22) are constant, and the eccentric assembly (4) and the grinding head (3) are axially displaced along the rotating shaft (22).

7. A tool for polishing through holes on a cabinet body according to claim 6, characterized in that, An arc-shaped track (43) is coaxially provided on the outer side of the ring (42), and a movable hammer head (44) is slidably arranged on the arc-shaped track (43). The weight of the movable hammer head (44) is less than the weight of the eccentric hammer (41), and the distance between the movable hammer head (44) and the axis of the ring (42) is less than the distance between the eccentric hammer (41) and the axis of the ring (42).

8. A tool for polishing through holes on a cabinet body according to claim 7, characterized in that, Springs (45) are respectively sleeved at both ends of the arc-shaped track (43).

9. A tool for polishing through holes on a cabinet body according to claim 1, characterized in that, The eccentric hammer (41) is provided at the upper end of the rotating shaft (22). Long strip holes (12) penetrating through the bottom surface and the top surface are opened along the length direction at both ends of the installation rod (1), the rotating shaft (22) passes through the long strip holes (12), and the eccentric hammer (41) is located above the installation rod (1).

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