CN218488031U - Structure integrating rotary shaft and flange platen and angle grinder using the structure - Google Patents

Abstract

The application discloses a structure integrating a rotating shaft and a flange pressing plate and an angle grinder using the structure, wherein the angle grinder comprises an output shaft used for connecting an angle grinder and a grinding sheet, the rear end of the output shaft is connected with the angle grinder, and the front end of the output shaft is connected with the grinding sheet and a locking nut; the outer wall of the wedge-shaped flange is provided with a forward rotating outer inclined plane, and the inner wall of the clamping flange is provided with an inner inclined plane matched with the outer inclined plane. In the process of high-speed operation and rapid stop of the angle grinder, the clamping flange and the wedge-shaped flange move relatively and generate displacement in the axial normal direction, so that the locking force of the clamping flange and the locking nut is increased, the locking nut is prevented from loosening, and the safety problem is solved.

Description

Structure integrating rotary shaft and flange platen and angle grinder using the structure

technical field

The application relates to a structure integrating a rotating shaft and a flange pressure plate and an angle grinder using the structure, in particular to a structure in which the angle grinder connects grinding slices through an output shaft, and belongs to the technical field of angle grinder auxiliary structures.

Background technique

When the hand-held electric angle grinder works at high speed and stops immediately, since the moment of inertia of the grinding section is in the opposite direction to the moment of machine braking, when the machine stops, the moment of inertia of the grinding section acts on the lock nut, which will drive the locking nut If the nut continues to rotate, there is a risk of breaking away from the output shaft. If the locking nut breaks away from the output shaft and the grinding piece becomes loose and falls off, it will cause a potential safety hazard.

Utility model content

The technical problem to be solved in this application is that when the angle grinder is stopped, the moment of inertia of the grinding section acts on the lock nut, which will drive the lock nut to continue to rotate, and there is a potential safety hazard of detaching from the output shaft.

In order to solve the above technical problems, on the one hand, the technical solution of the present application is to provide a structure that integrates the rotating shaft and the flange pressure plate, including the output shaft used to connect the angle grinder and the grinding section, the rear end of the output shaft is connected to the angle grinder, The front end is connected with a grinding piece and a lock nut, and it is characterized in that a support step is provided in the middle of the output shaft, and a wedge-shaped flange, a clamping flange, a grinding piece and a lock nut are sequentially set on the output shaft from the support step to the front end , part of the clamping flange is sleeved on the output shaft, and the other part is sleeved on the wedge-shaped flange; with the rotation direction of the output shaft as the positive direction, the outer wall of the wedge-shaped flange is provided with an outer slope for positive rotation, The inner wall of the clamping flange is provided with an inner slope matching the outer slope.

Wherein, the inner inclined surface of the clamping flange and the outer inclined surface of the wedge-shaped flange contact and limit; the clamping flange rotates forward and moves to the rear end under the limit of the inclined surface, and the clamping flange reversely rotates at the limit of the inclined surface. Move to the front end under the limit.

Preferably, the end surface of the clamping flange close to the grinding slice is set as a textured surface, that is, the end surface is provided with cross-distributed linear protrusions.

Preferably, a snap ring is provided at the position where the clamping flange and the output shaft are sleeved, and between the clamping flange and the output shaft.

On the other hand, the technical solution of the present application also provides an angle grinder, which adopts the above-mentioned structure integrating the rotating shaft and the flange pressure plate to connect the grinding section.

The advantage of this application is that when the angle grinder runs at high speed and stops quickly, the clamping flange and the wedge flange move relative to each other and produce displacement in the axial direction, thereby increasing the locking of the clamping flange and the lock nut At the same time, the surface of the clamping flange has a skin texture effect plane, which increases the friction between the clamping flange and the grinding section, more reliably locks the grinding section, prevents the lock nut from loosening, and solves safety problems.

Description of drawings

Fig. 1 is the schematic structural view of the integrated rotating shaft and flange pressing plate provided in the embodiment;

Fig. 2 is a schematic diagram of the angle grinder adopting the structure of Fig. 1 to connect the grinding section;

Figure 3 is a schematic diagram of the leather surface of the clamping flange;

Reference signs: output shaft 1, circlip 2, clamping flange 3, leather surface 31, wedge-shaped flange 4, lock nut 5, grinding section 6, angle grinder head shell locking flange 8.

Detailed ways

In order to make the application clearer and easier to understand, preferred embodiments are described in detail below with accompanying drawings.

Example

This embodiment provides a structure that integrates the rotating shaft and the flange pressure plate. When the angle grinder is stopped, the grinding section can be locked to prevent the grinding section from falling off. As shown in Figures 1 and 2, the rear end of the output shaft 1 passes through the corner The locking flange 8 of the mill head shell is connected to the angle grinder, and the front end is used to connect the grinding slice and the lock nut; there is a supporting step in the middle of the output shaft 1, and wedge-shaped flanges 4 are set on the output shaft 1 from the supporting step to the front end in sequence , clamping flange 3, grinding slice 6 and lock nut 5, part of clamping flange 3 is sleeved outside output shaft 1, and the other part is sleeved outside wedge flange 4, between clamping flange 3 and output shaft 1, there is a circlip 2 between the clamping flange 3 and the output shaft 1, and the circlip 2 can adjust the coaxiality between the clamping flange 3 and the output shaft 1 to avoid force deviation caused by Friction increases.

Taking the rotation direction of the output shaft 1 as the positive direction, the position where the clamping flange 3 and the wedge flange 4 are nested, the outer wall of the wedge flange 4 is provided with a positive rotating spiral outer slope, and the inner wall of the clamping flange 3 There is an inner inclined surface matching the outer inclined surface. When installing, the inner inclined surface of the clamping flange 3 and the outer inclined surface of the wedge flange 4 contact the limit, which is similar to the threaded connection; the positive rotation clamping flange 3 limits the inclined surface Move to the rear end under the position, reversely rotate the clamping flange 3 to move to the front; the end surface of the clamping flange 3 close to the grinding slice 6 is set as a leather surface 31, as shown in Figure 3, that is, there is a cross on the end surface Distributed linear protrusions, in order to enhance the friction between the clamping flange 3 and the grinding slice 6.

As shown in Figure 2, the wedge-shaped flange 4 is press-fitted onto the output shaft 1 with an interference fit, and then the clamping flange 3 is installed so that the inner slope of the clamping flange 3 is against the outer slope of the wedge-shaped flange 4, and then Install the grinding section 6 so that it is close to the leather surface of the clamping flange 3, and finally install the locking nut 5 to lock all the structures.

The rotary motion function and locking principle of this embodiment: when the rotary motion of the angle grinder stops, the moment of inertia of the grinding section 6 acts on the clamping flange 3 and drives the clamping flange 3 to rotate in reverse, and the surface skin of the clamping flange 3 The pattern increases the rotational friction between the clamping flange 3 and the component 6, preventing the two components from sliding relative to each other; when the clamping flange 3 rotates in the opposite direction, the inner slope of the clamping flange 3 is outside the wedge flange 4 The clamping flange 3 is displaced toward the front end under the limit of the inclined plane, and the axial displacement makes the clamping flange 35 and the locking nut lock the grinding piece 6 more firmly.

This embodiment provides a matching structure between the wedge flange 4 and the clamping flange 3 on the basis of the existing output shaft 1, the structure is compact and simple, the clamping effect is realized, and the lock nut 5 is prevented from loosening and the grinding piece 6 falls off. Thereby avoiding potential safety hazards.

Claims (5)

1. The structure for integrating the rotating shaft and the flange pressing plate comprises an output shaft (1) used for connecting an angle grinder and a grinding and cutting piece (6), wherein the rear end of the output shaft (1) is connected with the angle grinder, and the front end of the output shaft is connected with the grinding and cutting piece (6) and a locking nut (5), and is characterized in that a supporting step is arranged in the middle of the output shaft (1), a wedge-shaped flange (4), a clamping flange (3), the grinding and cutting piece (6) and the locking nut (5) are sequentially sleeved on the output shaft (1) from the supporting step to the front end, one part of the clamping flange (3) is sleeved on the output shaft (1), and the other part of the clamping flange is sleeved on the wedge-shaped flange (4); the rotating direction of the output shaft (1) is taken as the positive direction, the outer wall of the wedge-shaped flange (4) is provided with an outer inclined plane rotating in the positive direction, and the inner wall of the clamping flange (3) is provided with an inner inclined plane matched with the outer inclined plane.

2. The structure of integrating a rotating shaft and a flange pressure plate as claimed in claim 1, wherein the inner slope of the clamping flange (3) and the outer slope of the wedge-shaped flange (4) are in contact with each other for limiting; the clamping flange (3) rotates in the positive direction and moves towards the rear end under the limit of the inclined plane, and the clamping flange (3) rotates in the reverse direction and moves towards the front end under the limit of the inclined plane.

3. The structure of integrating a rotating shaft and a flange pressure plate as claimed in claim 1, wherein the end face of the clamping flange (3) close to the grinding sheet (6) is provided with a leather-grain surface, i.e. the end face is provided with linear protrusions distributed crosswise.

4. The structure for integrating the rotating shaft and the flange pressure plate as claimed in claim 1, wherein a clamp spring (2) is arranged between the clamping flange (3) and the output shaft (1) at the position where the clamping flange (3) and the output shaft (1) are sleeved.

5. An angle grinder, characterized in that the angle grinder employs a structure of an integrated rotating shaft and flange pressing plate according to any one of claims 1 to 3 in connection with grinding chips (6).

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