Quick-change handle of angle grinder

Abstract

The utility model relates to the technical field of angle grinder accessories, and discloses an angle grinder quick-change handle which comprises a handle body, a first connecting part fixedly arranged on an angle grinder head shell and a second connecting part fixedly arranged on the handle body. The first connecting part comprises a fixed body, a notch is formed from the center to one end of the fixed body, guide parts are arranged on the two sides of the groove wall respectively, and a positioning hole is formed in the front face of the fixed body. The second connecting part comprises a movable body, two side faces of the appearance of the movable body are matched with the guide parts, the two side faces are provided with sliding grooves in sliding fit with the guide parts, and the front face of the movable body is provided with an elastic pin. The guide part of the fixed body adopts an arc-shaped design and is accurately matched with the sliding chute of the movable body, so that stable guide is realized; the guide-in notch formed in the fixed body is in a funnel shape and can guide the elastic pin to enter the positioning hole smoothly. A control button at the tail of the handle is connected with the elastic pin through a connecting rod mechanism, and a convenient disassembly control mode is provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of angle grinder accessories, in particular to an angle grinder quick-change handle based on a guide matching and elastic locking mechanism, which is suitable for tool-free quick installation and disassembly of an angle grinder auxiliary handle in industrial production occasions that require frequent adjustment of operating posture. BACKGROUND

[0002] An angle grinder is a widely used handheld power tool, mainly used for metal polishing, cutting and other operations. In actual use, in order to adapt to different working environments and operating postures, the angle grinder usually needs to be equipped with a detachable auxiliary handle 01. Referring to the attached drawings, Figures 1-2 At present, the auxiliary handle connection structure of the angle grinder mainly adopts a threaded connection structure: the handle is connected with the angle grinder head shell 02 through threads 03. Although this structure is firm, it has the following disadvantages: it is time-consuming and laborious to install and disassemble, and it needs to be rotated several times to complete; the threads are easily worn after long-term use, causing unstable connection; in a dusty environment, the threads are easily contaminated, affecting installation and disassembly; tools are needed to complete the installation and disassembly operation.

[0003] With the continuous improvement of the efficiency requirements of industrial production, operators often need to quickly move between different workstations and frequently change working postures, which requires the auxiliary handle of the angle grinder to be quickly and conveniently installed and disassembled. At the same time, considering that there may be dust, oil stains and other factors in the working environment, the connection structure also needs to have strong anti-pollution ability and reliable locking effect. SUMMARY

[0004] The purpose of the present application is to solve the problems of the prior art. The present application provides an angle grinder quick-change handle which is tool-free, single-handed, and can be quickly installed and disassembled in 2 seconds through a guide part-slotted guide matching structure and an elastic pin-positioning hole locking mechanism, has a simple structure, reliable strength, and convenient maintenance, and can effectively meet the needs of tool quick switching in industrial production.

[0005] In order to solve the above problems, the present application adopts the following scheme: an angle grinder quick-change handle: comprising a handle body, a connection part one fixedly arranged on an angle grinder head shell, and a connection part two fixedly arranged on the handle body;

[0006] The connection part one comprises a positioning body, a slot is opened from the center to one end of the positioning body, the two sides of the slot wall of the slot are respectively provided with a guide part, and the front surface is provided with a positioning hole;

[0007] The connecting part two comprises a moving body, the two sides of the moving body are matched with the guide parts, the two sides of the moving body are provided with sliding grooves matched with the two guide parts, and the front side of the moving body is provided with elastic pins.

[0008] Beneficial effects: through the accurate matching of the guide parts and the sliding grooves and the locking mechanism of the elastic pins and the positioning holes, the handle is quickly installed and disassembled, the overall structure is simple and compact, the number of parts is small, the connection reliability is ensured, the manufacturing cost is reduced, and the operation can be completed without any tool.

[0009] As preferred, the fixed body is in a waist-shaped cross section, and the depth of the slot is half of the height of the fixed body. Beneficial effects: the waist-shaped cross section design not only improves the structural strength and avoids stress concentration, but also optimizes the overall space layout; the specific proportion design of the slot depth effectively reduces the overall weight and the processing and manufacturing difficulty while ensuring the connection strength.

[0010] As preferred, the guide part extends along the length direction of the slot, the cross section of the guide part is in an arc shape, the sliding groove is in an arc shape matched with the guide part, and the arc radius of the sliding groove is smaller than the arc radius of the guide part by 0.1-0.2 mm. Beneficial effects: the arc-shaped guide structure and the accurate matching gap design ensure the guiding accuracy while minimizing the sliding friction to the greatest extent, improve the operation smoothness, and the structure is convenient for processing and manufacturing, effectively avoiding the jamming phenomenon in the matching process.

[0011] As preferred, the positioning hole is arranged at the center position of the slot and offset to the handle, and the edge of the positioning hole is designed as a 45-degree chamfer structure. Beneficial effects: the position and structure design of the positioning hole optimizes the stress distribution, the chamfer structure not only avoids stress concentration and prolongs the service life, but also effectively guides the entering and disengaging of the elastic pins, greatly improving the operation convenience and reliability.

[0012] As preferred, the elastic pin adopts a combined structure of a spring and a pin, wherein the spring is made of 304 stainless steel, and the spring constant is 0.8-1.2 N / mm. Beneficial effects: the selection of the 304 stainless steel material combined with the reasonable spring constant design makes the elastic pin have excellent corrosion resistance and durability, while ensuring the locking reliability and operation convenience, and the standardized design is also convenient for later maintenance and replacement.

[0013] As preferred, the notch starting position of the fixed body is provided with a guide recess for guiding the elastic pin, the guide recess is funnel-shaped, and the edge thereof is treated with a 30-degree chamfer. Advantage: the design of the funnel-shaped guide recess matched with the 30-degree chamfer forms a perfect guiding system, significantly improves the assembly efficiency, reduces the operation failure rate, simultaneously reduces the wear degree of the parts, and prolongs the overall service life.

[0014] As preferred, the tail part of the handle body is provided with a control button for operating the elastic pin, and the control button is connected with the elastic pin through a connecting rod mechanism. Advantage: the design of the tail control button provides a more humanized operation mode, the transmission through the connecting rod mechanism reduces the operation force, is particularly suitable for use in narrow space or special working conditions, and significantly improves the practicability of the product.

[0015] As preferred, the transmission ratio of the connecting rod mechanism is 1:1.2, and the outer surface of the control button is provided with an anti-skid pattern. Advantage: the combination of the optimized transmission ratio design and the anti-skid pattern setting not only ensures the rationality of the operation force, but also improves the stability and reliability of the operation, and significantly improves the overall operation experience.

[0016] As preferred, the fixed body and the movable body are both made of 45 steel and are subjected to nitriding treatment on the surface. Advantage: the selection of the 45 steel material matched with the surface nitriding treatment not only ensures the basic strength, but also significantly improves the surface hardness and wear resistance, and effectively prolongs the service life of the product.

[0017] As preferred, a polytetrafluoroethylene coating is arranged between the contact surfaces of the fixed body and the movable body. Advantage: the application of the polytetrafluoroethylene coating significantly reduces the friction coefficient of the contact surface, not only improves the service life of the sliding part, but also improves the operation feeling, so that the whole mounting and dismounting process is more smooth and reliable.

[0018] Compared with the prior art, the technical scheme of the present application has the following advantages:

[0019] 1. Quick connection effect: the innovative guiding part-sliding groove matching structure matched with the elastic pin-positioning hole locking mechanism realizes the tool-free and one-handed operation of quick mounting and dismounting, the unique funnel-shaped guide recess design makes the operation more smooth, significantly improves the assembly efficiency, and the whole mounting process can be completed within 2 seconds, and the dismounting time is not more than 3 seconds.

[0020] 2. Structural reliability: the fixed body with a waist-shaped cross section provides excellent structural strength, and the accurate circular arc matching gap design (0.1-0.2 mm) ensures stable guiding effect.

[0021] 3. Operation convenience: The double disassembly scheme (direct pulling / button control) adapts to different working condition requirements, and the tail control button cooperates with the 1:1.2 transmission ratio connecting rod mechanism to reduce the operation force requirement.

[0022] 4. Machining manufacturability: The circular arc structure is convenient for machining, the standardized part design is convenient for batch production, the overall structure is simple, the number of parts is small, and the manufacturing cost is reduced.

[0023] 5. Maintenance convenience: The modular design is convenient for part replacement, and the standardized elastic pin assembly is easy to maintain.

[0024] The application significantly improves the use experience of the angle grinder handle through the synergistic effect of the above aspects, realizes the quick assembly and disassembly target while ensuring the operation safety and connection reliability, meets the demand of modern industrial production for tool quick switching, and has high practical value and popularization significance. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 The structure schematic diagram of the handle connection of the angle grinder in the prior art is shown in the figure;

[0027] Figure 2 The structure schematic diagram of the handle and the angle grinder separation in the prior art is shown in the figure;

[0028] Figure 3 The structure schematic diagram of the handle connection of the angle grinder in the present application is shown in the figure;

[0029] Figure 4 The structure schematic diagram of the connecting part one and the handle body in the present application is shown in the figure;

[0030] Figure 5 The structure schematic diagram of the connecting part one and the handle body in the present application is shown in the figure;

[0031] Figure 6 The structure schematic diagram of the connecting part two in the present application is shown in the figure.

[0032] Reference signs:

[0033] Handle body 01, angle grinder head shell 02, thread 03, connecting part one 100, fixed body 110, notch 111, guide part 112, positioning hole 113, lead-in notch 114, connecting part two 200, moving body 210, sliding groove 211, elastic pin 212, control button 213. DETAILED DESCRIPTION

[0034] The following will be combined Figures 1-6 The preferred embodiments of the present application are described in detail. It should be noted that the following description is only a preferred embodiment of the present application, not a limitation of the present application. Those skilled in the art should understand that various modifications and variations can be made to the present application without departing from the spirit and scope of the present application. The scope of protection of the present application should be subject to the appended claims.

[0035] Example 1: a quick-change handle for angle grinder, refer to 3- Figure 6 , including handle body 01, connecting part one 100 fixedly arranged on the angle grinder head shell 02, connecting part two 200 fixedly arranged on the handle body 01;

[0036] Wherein, the connecting part one 100 includes a fixed body 110, the center of the fixed body 110 to one end is provided with a notch 111, the two sides of the notch wall are respectively provided with guide parts 112, and the front surface is provided with a positioning hole 113; the connecting part two 200 includes a moving body 210, the size of the two sides of the moving body 210 is matched with the guide parts 112, the two sides are provided with sliding grooves 211 matched with the two guide parts 112, and the front surface is provided with an elastic pin 212, the elastic pin 212 enters the positioning hole 113 after the sliding groove 211 enters the guide part 112 a distance, so as to realize the quick connection of the connecting part one 100 and the connecting part two 200.

[0037] Specifically, the cross section of the fixed body 110 is waist-shaped, the long axis diameter is 30-40mm, and the short axis diameter is 20-25mm, which not only ensures the structural strength, but also reduces the overall volume. The depth of the notch 111 is half of the height of the fixed body 110, and the width of the notch 111 is matched with the width of the moving body 210, specifically 15-20mm. The guide part 112 extends along the length direction of the notch 111, and the cross section is arc-shaped, and the arc radius is 4-6mm, so as to ensure the stable sliding of the sliding groove 211 in the guide part 112, and facilitate processing and manufacturing.

[0038] The positioning hole 113 is arranged in the middle of the slot 111, 15-20 mm away from the opening end of the slot, and has a depth of 3-5 mm, which is suitable for the extension length of the elastic pin 212. The edge of the positioning hole 113 is designed as a 45-degree chamfer structure with a chamfer depth of 0.5-1 mm, so as to facilitate the smooth entry of the elastic pin 212.

[0039] The overall shape of the movable body 210 matches the slot 111, and the sliding grooves 211 on both sides are in the form of a circular arc matched with the guide portion 112, and the curvature radius of the circular arc is 0.1-0.2 mm smaller than the radius of the guide portion 112, so as to ensure good sliding fit. The elastic pin 212 adopts a combined structure of spring and pin, wherein the spring is made of 304 stainless steel, the spring constant is 0.8-1.2 N / mm, and the pre-compression amount is 2-3 mm, which can not only ensure that the pin can be stably locked in the positioning hole 113, but also ensure that the user can easily press the pin to realize disassembly.

[0040] The starting position of the slot of the fixed body 110 is provided with a lead-in notch 114 for guiding the elastic pin 212, and the lead-in notch 114 is in the form of a funnel with an opening width of 5-8 mm and a depth of 2-3 mm, so as to ensure that the elastic pin 212 can smoothly slide into the positioning hole 113. The edge of the lead-in notch 114 is also chamfered, and the chamfer angle is 30 degrees, which can effectively prevent the phenomenon of jamming during use.

[0041] In some specific embodiments, a control button 213 for operating the elastic pin 212 is arranged at the tail of the handle body 01, and the control button 213 is connected to the elastic pin 212 through a connecting rod mechanism made of stainless steel, and the transmission ratio of the connecting rod mechanism is 1:1.2. This design enables the operator to conveniently control the release of the elastic pin 212 at the tail of the handle, further improving the operation convenience. The outer surface of the control button 213 is provided with anti-slip lines with a depth of 0.5-1 mm and a pitch of 2 mm to improve the operation feeling.

[0042] In order to improve the durability of the overall structure, the fixed body 110 and the movable body 210 are both made of 45 steel, and the surface is subjected to nitriding treatment with a hardness of HRC52-58, which not only improves the wear resistance of the parts, but also effectively prevents rust. At the same time, a polytetrafluoroethylene coating is arranged between the two contact surfaces, and the coating thickness is 0.02-0.05 mm, which can reduce the friction and improve the sliding smoothness.

[0043] In actual use, the angle grinder quick-change handle of the embodiment has the following use steps and characteristics:

[0044] 1. Installation steps:

[0045] The user only needs to align the moving body 210 of the connecting part two 200 with the slot 111 of the connecting part one 100, and align the sliding grooves 211 on both sides of the moving body 210 with the guide parts 112. At this time, the elastic pins 212 will automatically abut against the inclined surface of the lead-in notch 114, and gradually compress under the guidance of the lead-in notch 114 as the sliding grooves 211 advance along the guide parts 112. When the sliding grooves 211 completely enter the guide parts 112, the elastic pins 212 will automatically pop into the positioning holes 113 under the action of the spring force, accompanied by a crisp "click" sound, and the quick connection is completed. The entire installation process does not require any tools and can be completed with one hand in less than 2 seconds.

[0046] Disassembly steps:

[0047] When disassembly is required, the user can use two ways:

[0048] 1. Pull the handle body 01 in the opposite direction of the installation with great force, use the reverse force to force the elastic pins 212 to slide from the positioning holes 113 along the lead-in notches 114 and compress, and at the same time, pull the connecting part two 200 away from the guide parts 112. This method is suitable for quick disassembly or single-handed operation;

[0049] 2. Press the control button 213 at the tail of the handle to drive the connecting rod mechanism to retract the elastic pins 212 so that they are completely separated from the positioning holes 113, and at the same time, smoothly pull the connecting part two 200 out of the guide parts 112. This method is more convenient to operate and does not require excessive pulling force, and is particularly suitable for use in small spaces or when wearing gloves.

[0050] The operation time required by both disassembly methods does not exceed 3 seconds, and the appropriate disassembly method can be selected according to the actual working environment and personal habits. Among them, the second method has one more pressing action, but it causes less wear and tear on the parts, and is more conducive to prolonging the service life of the product.

Claims

1. An angle grinder quick change handle characterized by: Handle body (01), fixedly arranged on the connecting part one (100) of the angle grinder head shell (02) and fixedly arranged on the connecting part two (200) of the handle body (01); Wherein, the connecting part one (100) includes a fixed body (110), a notch (111) is opened from the center to one end of the fixed body (110), the two sides of the notch (111) slot wall respectively have guide part (112), and the front face has positioning hole (113); The connecting part two (200) includes a moving body (210), the two side faces of the moving body (210) are matched with the guide part (112), the two side faces have sliding groove (211) matched with the two guide part (112), the front face has elastic pin (212), and the elastic pin (212) can enter the positioning hole (113) after the sliding groove (211) enters the guide part (112) a distance.

2. The angle grinder quick change handle of claim 1, wherein: The cross section of the fixed body (110) is waist-shaped, and the depth of the notch (111) is half of the height of the fixed body (110).

3. The angle grinder quick change handle of claim 1, wherein: The guide part (112) extends along the length direction of the notch (111), and the cross section is arc-shaped, the sliding groove (211) is arc-shaped matched with the guide part (112), and the arc radius of the sliding groove (211) is smaller than the arc radius of the guide part (112) by 0.1-0.2mm.

4. The angle grinder quick change handle of claim 1, wherein: The positioning hole (113) is arranged at the center position of the middle part of the notch (111) and the mouth, and the edge of the positioning hole (113) is designed as a 45 degree chamfer structure.

5. The angle grinder quick change handle of claim 1, wherein: The elastic pin (212) adopts a combination structure of spring and pin, wherein the spring is made of 304 stainless steel, and the spring constant is 0.8-1.2N / mm.

6. The angle grinder quick change handle of claim 1, wherein: The notch (114) is provided at the starting position of the notch of the fixed body (110) for guiding the elastic pin (212), and the notch (114) is funnel-shaped, and the edge is treated with 30 degree chamfer.

7. The angle grinder quick change handle of claim 1, wherein: The tail of the handle body (01) is provided with a control button (213) for operating the elastic pin (212), and the control button (213) is connected with the elastic pin (212) through a connecting rod mechanism.

8. The angle grinder quick change handle of claim 7, wherein: The transmission ratio of the connecting rod mechanism is 1:1.2, and the outer surface of the control button (213) is provided with anti-skid lines.

9. The angle grinder quick change handle of claim 1, wherein: The fixed body (110) and the moving body (210) are made of 45 steel, and the surface is treated by nitriding.

10. The angle grinder quick change handle of claim 1, wherein: The contact surface between the fixed body (110) and the moving body (210) is provided with a polytetrafluoroethylene coating.

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