Handheld grinding device

Abstract

The utility model discloses a handheld polishing device which comprises a shell, a first gas circuit and a second gas circuit are arranged in a handle shell, a third gas circuit is arranged in an adjusting shell, and a fourth gas circuit is arranged in a working shell. A first piston cavity is formed between the first gas path and the second gas path, a first piston mechanism is arranged in the first piston cavity, the first piston mechanism at least comprises a first piston sliding in the first piston cavity, and an air hole is formed in the first piston; the airflow valve and the ejector pin are arranged in the third air path, and the ejector pin is operably close to or far away from the airflow valve; one end of the screw rod is arranged in the fourth gas path, the other end of the screw rod protrudes out of the shell, and the fan blades are arranged in the fourth gas path and fixedly connected with the screw rod; the grinding wheel is detachably connected with the end, protruding out of the shell, of the screw. The fan blades are driven by compressed air to drive the grinding wheel, the air flow is adjusted through the adjusting knob to control the rotating speed of the grinding wheel, and an electrode clamp and the like are efficiently ground.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding devices, in particular to a handheld grinding device. Background Art

[0002] The sandpaper in the prior art is a rectangular piece of paper, a material for grinding. It is used to grind the surface of metal, wood, etc. to make it smooth and clean. It is usually made of various grinding sands glued to the base paper. By using the sandpaper to grind the electrode clamp, copper bar and copper rod, the patina on the surface is removed, the surface is smoothed, the working efficiency is improved, and the occurrence of abnormalities such as sparking and short circuit is reduced.

[0003] In the prior art, the efficiency of sandpaper grinding is low. Due to the strong adhesion of verdigris and the complex shapes of electrode clips, copper bars and copper rods, manual grinding cannot effectively remove the verdigris and other impurities on the electrode clips, copper bars and copper bars, and it is also difficult to remove the verdigris in the corners, which not only causes a waste of manpower, but also causes the surface of the electrode clip to be uneven due to the fact that the verdigris is not cleaned up, resulting in an increased probability of abnormalities such as sparking and short circuits. Utility Model Content

[0004] The utility model provides a handheld grinding device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A handheld grinding device, comprising:

[0007] A housing, the housing comprising a working housing, an adjusting housing, and a handle housing connected in sequence, wherein the handle housing has a first gas path and a second gas path interconnected from bottom to top, the adjusting housing has a third gas path connected to the second gas path, and the working housing has a fourth gas path connected to the third gas path;

[0008] A first piston mechanism, wherein a first piston cavity is provided between the first gas path and the second gas path, the first piston cavity is provided with the first piston mechanism, the first piston mechanism at least comprises a first piston sliding in the first piston cavity, an air hole is provided on the first piston, and the air hole can operably connect the first gas path and the second gas path;

[0009] An air flow valve and an ejector pin, wherein the air flow valve and the ejector pin are arranged inside the third air path, and the ejector pin can be operably moved close to or away from the air flow valve to adjust the size of the valve hole of the air flow valve;

[0010] A screw and a fan blade, wherein one end of the screw is arranged in the fourth air path, the other end of the screw protrudes from the housing, and the fan blade is arranged in the fourth air path and fixedly connected to the screw;

[0011] A grinding wheel is detachably connected to an end of the screw rod protruding from the housing.

[0012] The above-mentioned handheld grinding device, wherein the first piston mechanism further comprises:

[0013] A first piston rod, one end of which is connected to the first piston, the other end of which passes through the handle housing and protrudes out of the handle housing, and the first piston rod is slidably connected to the handle housing;

[0014] A first elastic member, one end of the first elastic member abuts against the first piston, and the other end of the first elastic member abuts against the inner wall of the handle housing.

[0015] The handheld grinding device mentioned above further includes: a second piston mechanism, a second piston cavity is provided in the middle of the second gas path, the second piston mechanism is provided in the second piston cavity, and the second piston mechanism includes:

[0016] a second piston, the second piston sliding inside the second piston cavity, the second piston not closing the second gas path;

[0017] a second piston rod, one end of which is connected to the second piston, the other end of which passes through the handle housing and protrudes out of the handle housing, and the second piston is slidably connected to the handle housing;

[0018] A second elastic member, one end of the second elastic member abuts against the second piston, and the other end of the second elastic member abuts against the inner wall of the handle housing.

[0019] The above-mentioned handheld grinding device, wherein, further comprises:

[0020] A trigger is arranged outside the housing, the trigger is rotatably connected to the housing, and at least one of the other end of the first piston rod and the other end of the second piston rod abuts against the trigger.

[0021] In the above-mentioned handheld grinding device, the air flow valve has a valve hole, and the inner diameter of the valve hole gradually decreases from the side facing the ejector pin to the inner diameter of the middle part, or the inner diameter of the valve hole gradually decreases from the side facing the ejector pin to the inner diameter of the other end.

[0022] The above-mentioned handheld grinding device, wherein the ejector pin comprises:

[0023] An ejector pin head, the ejector pin head is arc-shaped or conical, and the ejector pin head can be operably pressed against the valve hole;

[0024] A push rod, one end of which is fixedly connected to the ejector pin head;

[0025] The tail of the ejector pin, the other end of the ejector rod is fixedly connected to one end of the tail of the ejector pin, the other end of the tail of the ejector pin passes through the adjustment shell and protrudes out of the adjustment shell, and the tail of the ejector pin is threadedly connected to the adjustment shell.

[0026] The above-mentioned handheld grinding device, wherein the other end of the tail of the ejector pin is provided with an adjusting knob.

[0027] In the above-mentioned handheld grinding device, the first piston cavity and the second piston cavity are both columnar cavities, and there is an angle between the first piston cavity and the second piston cavity.

[0028] In the above-mentioned handheld grinding device, the first gas path and the second gas path are arranged in a vertical direction, the third gas path is arranged in a horizontal direction, and the fourth gas path is arranged in a vertical direction.

[0029] In the above-mentioned handheld grinding device, the airflow valve includes two valve plates arranged opposite to each other, the ends of the two valve plates are arc-shaped, the ends of the two valve plates are abutted against each other, and the valve hole is formed between the ends of the two valve plates.

[0030] Due to the adoption of the above technology, the utility model has the following positive effects compared with the prior art:

[0031] (1) The utility model utilizes compressed air to drive the fan blades to drive the grinding wheel, and controls the rotation speed of the grinding wheel by adjusting the air flow rate through the adjustment knob, so as to efficiently grind the electrode clamp and the like.

[0032] (2) The utility model can replace grinding wheels of different particle sizes and diameters through a screw, so that the dead corners that cannot be cleared by manual grinding can be cleaned by replacing the grinding wheels. And by replacing grinding wheels of different particle sizes, the surface of the electrode clamp can be made smoother and flatter.

[0033] (3) The utility model greatly improves the efficiency of grinding work, effectively reduces the occurrence of abnormalities such as sparking and short circuit, reduces the equipment caused by short circuit, reduces manpower, time cost and equipment maintenance cost, improves the production operation rate of the workshop site, and improves economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figures 1 to 3 It is a schematic diagram of a handheld grinding device of the present invention.

[0035] The symbols in the drawings of the specification include:

[0036] 1. Shell; 11. Working shell; 12. Adjusting shell; 13. Handle shell; 21. First air circuit; 22. Second air circuit; 23. Third air circuit; 24. Fourth air circuit; 3. First plug mechanism; 31. First piston; 311. Air hole; 32. First piston rod; 33. First elastic member; 4. Air flow valve; 41. Valve plate; 5. Ejector pin; 51. Ejector pin head; 52. Ejector rod; 53. Ejector pin tail; 54. Adjusting knob; 6. Screw; 7. Fan blade; 8. Grinding wheel; 9. Second piston mechanism; 91. Second piston; 92. Second piston rod; 93. Second elastic member; 10. Trigger. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside”, “front”, “back”, “lateral” and “vertical” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device or component referred to must have a specific direction and therefore should not be understood as a limitation on the present invention.

[0039] It should be specially explained that the terms “horizontal” and “vertical” in the present invention are used to illustrate a rough positional relationship, rather than a strict “horizontal plane” or “vertical plane”.

[0040] It should be noted that, in order to illustrate and compare the same component in different positions, two identical or repeated components may be drawn in the same figure. In fact, in the mechanism of the present invention, there is only one set of door panels and lifters.

[0041] See also Figures 1 to 3As shown, a handheld grinding device of a preferred embodiment is shown, comprising: a housing 1, a first piston mechanism 3, an air flow valve 4 and an ejector pin 5, a screw 6 and a fan blade 7, and a grinding wheel 8, wherein the housing 1 comprises a working housing 11, an adjusting housing 12, and a handle housing 13 connected in sequence, wherein the interior of the handle housing 13 is provided with a first air path 21 and a second air path 22 interconnected from bottom to top, a third air path 23 connected to the second air path 22 is provided in the adjusting housing, and a fourth air path 24 connected to the third air path 23 is provided in the working housing 11; a first piston cavity is provided between the first air path 21 and the second air path 22, and the first piston cavity is provided with a first piston cavity. A first piston mechanism 3 is provided inside, and the first piston mechanism 3 at least includes a first piston 31 sliding inside the first piston cavity, and an air hole 311 is opened on the first piston 31, and the air hole 311 can be operably connected to the first air path 21 and the second air path 22; the air flow valve 4 and the ejector pin 5 are arranged inside the third air path 23, and the ejector pin 5 can be operably moved close to or away from the air flow valve 4 to adjust the size of the valve hole of the air flow valve 4; one end of the screw rod 6 is arranged in the fourth air path 24, and the other end of the screw rod 6 protrudes from the shell 1, and the fan blade 7 is arranged in the fourth air path 24 and fixedly connected to the screw rod 6; the grinding wheel 8 is detachably connected to the end of the screw rod 6 protruding from the shell 1.

[0042] Furthermore, as a preferred embodiment, the first piston mechanism 3 also includes: a first piston rod 32, one end of the first piston rod 32 is connected to the first piston 31, the other end of the first piston rod 32 passes through the handle shell 13 and protrudes outside the handle shell 13, and the first piston rod 32 is slidably connected to the handle shell 13.

[0043] Furthermore, as a preferred embodiment, the first piston mechanism 3 further includes: a first elastic member 33 , one end of the first elastic member 33 abuts against the first piston 31 , and the other end of the first elastic member 33 abuts against the inner wall of the handle housing 13 .

[0044] For details, see Figure 1 , Figure 2 As shown, a positioning column is provided on the right side of the first piston 31, and a positioning column is also provided on the left inner wall of the first cavity. The first elastic member 33 is preferably a spring, and both ends of the first elastic member 33 are respectively sleeved on the two positioning columns.

[0045] Specifically, the first piston rod 32 is compressed, and the first piston 31 moves Figure 1 , Figure 2 The first piston 31 moves to the right side so that the air hole 311 on the first piston 31 is opposite to the first air path 21, so that the first air path 21 and the second air path 22 are connected through the air hole 311.

[0046] Furthermore, as a preferred embodiment, it also includes: a second piston mechanism 9, a second piston cavity is provided in the middle of the second gas path 22, the second piston mechanism 9 is arranged in the second piston cavity, and the second piston mechanism 9 includes: a second piston 91, the second piston 91 slides inside the second piston cavity, and the second piston 91 does not close the second gas path.

[0047] Further, as a preferred embodiment, the second piston mechanism 9 includes: a second piston rod 92, one end of the second piston rod 92 is connected to the second piston 91, the other end of the second piston rod 92 passes through the handle housing 13 and protrudes outside the handle housing 13, and the second piston 91 is slidably connected to the handle housing 13.

[0048] Further, as a preferred embodiment, the second piston mechanism 9 includes: a second elastic member 93 , one end of the second elastic member 93 abuts against the second piston 91 , and the other end of the second elastic member 93 abuts against the inner wall of the handle housing 13 .

[0049] For details, see Figure 1 , Figure 2 As shown, a positioning column is provided on the right side of the second piston 91, and a positioning column is also provided on the left inner wall of the second cavity. The second elastic member 93 is preferably a spring, and both ends of the second elastic member 93 are respectively sleeved on the two positioning columns.

[0050] Furthermore, as a preferred embodiment, it also includes: a trigger 10, which is arranged outside the housing 1, and is rotatably connected to the housing 1, and at least one of the other end of the first piston rod 32 and the other end of the second piston rod 92 is against the trigger 10.

[0051] Specifically, the trigger 10 has a rotation axis, which is located on the adjustment housing 12, especially located above the handle housing, and the trigger 10 rotates around the rotation axis.

[0052] More specifically, when the operator rotates the trigger 10 , the first piston rod 32 and the second piston rod 92 can be compressed.

[0053] Further, as a preferred embodiment, the air flow valve 4 has a valve hole, and the inner diameter of the valve hole gradually decreases from the side facing the ejector pin 5 to the inner diameter of the middle part, or the inner diameter of the valve hole gradually decreases from the side facing the ejector pin 5 to the inner diameter of the other end.

[0054] Further, as a preferred embodiment, the ejector pin 5 comprises an ejector pin head 51 , which is arc-shaped or conical, and the ejector pin head 51 can be operably pressed against the valve hole.

[0055] Specifically, the ejector head 51 abuts against the valve hole, and the distance between the ejector head 51 and the valve hole is adjusted, and the gap between the ejector head 51 and the valve hole is adjusted, so as to adjust the working size of the valve hole and adjust the airflow.

[0056] Further, as a preferred embodiment, the ejector pin 5 includes an ejector rod 52 , one end of which is fixedly connected to the ejector pin head 51 .

[0057] Further, as a preferred embodiment, the ejector pin 5 includes: an ejector pin tail 53, the other end of the ejector rod 52 is fixedly connected to one end of the ejector pin tail 53, the other end of the ejector pin tail 53 passes through the adjustment shell 12 and protrudes outside the adjustment shell 12, and the ejector pin tail 53 is threadedly connected to the adjustment shell 12.

[0058] Specifically, by rotating the ejector tail 53, the ejector tail 53 is moved relative to the adjusting housing 12. Figure 1 , Figure 2 The ejector pin 51 is displaced in the left-right direction, thereby further adjusting the position of the ejector pin head 51 relative to the valve hole.

[0059] Furthermore, as a preferred embodiment, an adjusting knob 54 is provided at the other end of the ejector tail 53 .

[0060] Specifically, by rotating the adjustment knob 54 to rotate the ejector tail 53.

[0061] Further, as a preferred embodiment, the first piston cavity and the second piston cavity are both columnar cavities, and there is an angle between the first piston cavity and the second piston cavity.

[0062] Further, as a preferred embodiment, the first gas path 21 and the second gas path 22 are arranged in the vertical direction, the third gas path 23 is arranged in the horizontal direction, and the fourth gas path 24 is arranged in the vertical direction.

[0063] Further, as a preferred embodiment, the air flow valve 4 includes two valve plates 41 arranged opposite to each other, the ends of the two valve plates 41 are arc-shaped, the ends of the two valve plates 41 are abutted against each other, and a valve hole is formed between the ends of the two valve plates 41.

[0064] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A handheld grinding device, characterized in that: include: A housing, the housing comprising a working housing, an adjusting housing, and a handle housing connected in sequence, wherein the handle housing has a first gas path and a second gas path interconnected from bottom to top, the adjusting housing has a third gas path connected to the second gas path, and the working housing has a fourth gas path connected to the third gas path; A first piston mechanism, wherein a first piston cavity is provided between the first gas path and the second gas path, the first piston cavity is provided with the first piston mechanism, the first piston mechanism at least comprises a first piston sliding in the first piston cavity, an air hole is provided on the first piston, and the air hole can operably connect the first gas path and the second gas path; An air flow valve and an ejector pin, wherein the air flow valve and the ejector pin are arranged inside the third air path, and the ejector pin can be operably moved close to or away from the air flow valve to adjust the size of the valve hole of the air flow valve; A screw and a fan blade, one end of the screw is arranged in the fourth air path, the other end of the screw protrudes from the housing, and the fan blade is arranged in the fourth air path and fixedly connected to the screw; A grinding wheel is detachably connected to an end of the screw rod protruding from the housing.

2. The handheld grinding device according to claim 1, characterized in that: The first piston mechanism further comprises: A first piston rod, one end of which is connected to the first piston, the other end of which passes through the handle housing and protrudes out of the handle housing, and the first piston rod is slidably connected to the handle housing; A first elastic member, one end of the first elastic member abuts against the first piston, and the other end of the first elastic member abuts against the inner wall of the handle housing.

3. The handheld grinding device according to claim 2, characterized in that: Also includes: A second piston mechanism, a second piston cavity is provided in the middle of the second gas path, the second piston mechanism is provided in the second piston cavity, and the second piston mechanism includes: a second piston, the second piston sliding inside the second piston cavity, the second piston not closing the second gas path; a second piston rod, one end of which is connected to the second piston, the other end of which passes through the handle housing and protrudes out of the handle housing, and the second piston is slidably connected to the handle housing; A second elastic member, one end of the second elastic member abuts against the second piston, and the other end of the second elastic member abuts against the inner wall of the handle housing.

4. The handheld grinding device according to claim 3, characterized in that: Also includes: A trigger is arranged outside the housing, the trigger is rotatably connected to the housing, and at least one of the other end of the first piston rod and the other end of the second piston rod abuts against the trigger.

5. The handheld grinding device according to claim 1, characterized in that: The air flow valve has a valve hole, the inner diameter of the valve hole gradually decreases from one side facing the ejector pin to the inner diameter of the middle part, or the inner diameter of the valve hole gradually decreases from one side facing the ejector pin to the inner diameter of the other end.

6. The handheld grinding device according to claim 5, characterized in that: The ejector pin comprises: An ejector pin head, the ejector pin head is arc-shaped or conical, and the ejector pin head can be operably pressed against the valve hole; A push rod, one end of which is fixedly connected to the ejector head; The tail of the ejector pin, the other end of the ejector rod is fixedly connected to one end of the tail of the ejector pin, the other end of the tail of the ejector pin passes through the adjustment shell and protrudes out of the adjustment shell, and the tail of the ejector pin is threadedly connected to the adjustment shell.

7. The handheld grinding device according to claim 6, characterized in that: The other end of the tail of the ejector pin is provided with an adjusting knob.

8. The handheld grinding device according to claim 4, characterized in that: The first piston cavity and the second piston cavity are both columnar cavities, and there is an angle between the first piston cavity and the second piston cavity.

9. The handheld grinding device according to claim 1, characterized in that: The first gas path and the second gas path are arranged in a vertical direction, the third gas path is arranged in a horizontal direction, and the fourth gas path is arranged in a vertical direction.

10. The handheld grinding device according to claim 5, characterized in that: The air flow valve comprises two valve plates arranged opposite to each other, the ends of the two valve plates are arc-shaped, the ends of the two valve plates are butted against each other, and the valve hole is formed between the ends of the two valve plates.

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