CN114770314A - Structure for integrating rotating shaft and flange pressing plate and angle grinder using structure - Google Patents

Abstract

The present application discloses a structure integrating a rotating shaft and a flange pressing plate and an angle grinder using the structure, including an output shaft for connecting the angle grinder and a grinding slice, the rear end of the output shaft is connected to the angle grinder, and the front end is connected to the grinder The cutting and locking nut is characterized in that a support step is arranged in the middle of the output shaft, and a wedge flange, a clamping flange, a grinding section and a locking nut are sequentially sleeved on the output shaft from the supporting step to the front end, and the clamping flange One part is sleeved on the output shaft, and the other part is sleeved on the wedge-shaped flange; the outer wall of the wedge-shaped flange is provided with a positive rotating outer slope, and the inner wall of the clamping flange is provided with an inner slope matching the outer slope. During the high-speed operation and rapid stop of the angle grinder, the clamping flange and the wedge flange move relatively and generate displacement in the axial normal direction, thereby increasing the locking force of the clamping flange and the lock nut and avoiding locking. The nut is loose, solving the safety problem.

Description

A structure integrating a rotating shaft and a flange pressing plate and an angle grinder using the structure

technical field

The present application relates to a structure integrating a rotating shaft and a flange pressing plate and an angle grinder using the structure, in particular to a structure in which an angle grinder connects grinding slices through an output shaft, belonging 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 inertia moment of the grinding slice is in the opposite direction to the moment of the machine braking, the inertia moment of the grinding slice acts on the lock nut during the machine stop process, which will drive the locking nut. If the nut continues to rotate, there is a risk of being separated from the output shaft. If the locking nut is separated from the output shaft and the grinding piece loosens and falls off, it will cause a safety hazard.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present application is that the moment of inertia of the grinding slices acts on the locking nut when the angle grinder is stopped, which will drive the locking 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 integrating a rotating shaft and a flange pressing plate, including an output shaft for connecting an angle grinder and a grinding slice, and the rear end of the output shaft is connected to an angle grinder The front end is connected with the grinding section and the locking nut. It is characterized in that the middle of the output shaft is provided with a support step, and the output shaft is sequentially sleeved with a wedge flange, a clamping flange, a grinding section and a lock from the support step to the front end. Tighten the nut, a part of the clamping flange is sleeved on the output shaft, and the other part is sleeved on the wedge-shaped flange; taking the rotation direction of the output shaft as the positive direction, the outer wall of the wedge-shaped flange is provided with a positive rotating outer Inclined surface, the inner wall of the clamping flange is provided with an inner sloping surface matching the outer sloping surface.

Wherein, the inner slope of the clamping flange and the outer slope of the wedge flange contact the limit; the forward rotation of the clamping flange moves to the rear end under the limit of the slope, and the reverse rotation of the clamping flange is at the limit of the slope. Move to the front under the limit.

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

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

On the other hand, the technical solution of the present application also provides a method for assembling an angle grinder to connect the grinding slices, using the above-mentioned structure of integrating the rotating shaft and the flange pressing plate to connect the grinding slices, and the specific steps are:

Step 1. Press-fit the wedge flange to the output shaft with interference fit;

Step 2, install the clamping flange so that the inner inclined surface of the clamping flange abuts on the outer inclined surface of the wedge flange; Step 3, install the grinding plate to make it close to the dermatoglyphic surface of the clamping flange;

Step 4. Install locking nuts to lock all structures.

The advantage of the present application is that during the 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, thereby increasing the locking between the clamping flange and the lock nut. At the same time, the surface of the clamping flange has a dermatoglyphic effect plane, which increases the friction between the clamping flange and the grinding section, locks the grinding section more reliably, avoids the loosening of the lock nut, and solves the safety problem.

Description of drawings

1 is a schematic structural diagram of an integrated rotating shaft and a flange pressing plate provided in an embodiment;

Fig. 2 is that the angle grinder adopts the structure of Fig. 1 to connect and grind slices;

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

Reference numerals: output shaft 1, clamping flange 2, leather surface 21, wedge flange 3, locking nut 5, grinding piece 6, angle grinder head shell locking flange 8.

Detailed ways

In order to make the present application more obvious and easy to understand, preferred embodiments are hereby described in detail with the accompanying drawings as follows.

Example

This embodiment provides a structure that integrates the rotating shaft and the flange pressing plate, and locks the grinding slices when the angle grinder stops to prevent the grinding slices from falling off. As shown in Figures 1 and 2, the rear end of the output shaft 1 passes through the angle grinder. The grinding machine head shell locking flange 8 is connected to the angle grinder, and the front end is used to connect the grinding slice and the lock nut; there is a support step in the middle of the output shaft 1, and a wedge flange 3 is sleeved on the output shaft 1 from the support step to the front end in sequence. , Clamping flange 2, grinding section 6 and locking nut 5, one part of clamping flange 2 is sleeved outside the output shaft 1, and the other part is sleeved outside the wedge flange 3;

Taking the rotation direction of the output shaft 1 as the positive direction, the position where the clamping flange 2 and the wedge-shaped flange 3 are nested, the outer wall of the wedge-shaped flange 3 is provided with a positive rotating spiral outer slope, and the inner wall of the clamping flange 2 There is an inner bevel that matches the outer bevel. During installation, the inner bevel of the clamping flange 2 and the outer bevel of the wedge-shaped flange 3 are in contact with the limit, which is similar to a threaded connection; Move down to the rear end, and reversely rotate the clamping flange 2 to move to the front end; the end face of the clamping flange 2 that is close to the grinding slice 6 is set as the dermatoglyphic surface 21, that is, the end face is provided with cross-distributed linear protrusions , in order to enhance the friction between the clamping flange 2 and the grinding plate 6 in contact.

As shown in Figure 2, the wedge-shaped flange 3 is press-fitted onto the output shaft 1, and then the clamping flange 2 is installed so that the inner slope of the clamping flange 2 abuts against the outer slope of the wedge-shaped flange 3, and then the clamping flange 2 is installed. Install the grinding plate 6 to make it close to the dermatoglyphic surface of the clamping flange 2, and finally install the lock nut 5 to lock all the structures.

Rotational motion function and locking principle of this embodiment: When the rotational motion of the angle grinder stops, the moment of inertia of the grinding piece 6 acts on the clamping flange 2 and drives the clamping flange 2 to rotate in the opposite direction, and the surface of the clamping flange 2 is peeled off. The pattern increases the rotational friction between the clamping flange 2 and the part 6, preventing the relative sliding between the two parts; when the clamping flange 2 rotates in the opposite direction, the inner slope of the clamping flange 2 is outside the wedge flange 3 Under the limit of the inclined surface, the clamping flange 2 is displaced to the front end, and the axial displacement makes the clamping flange 25 and the lock nut lock the grinding piece 6 more firmly.

This embodiment provides a matching structure of the wedge flange 3 and the clamping flange 2 on the basis of the existing output shaft 1, the structure is compact and concise, the clamping effect is realized, the loosening of the locking nut 5 and the falling off of the grinding piece 6 are avoided, Thereby avoiding safety hazards.

Claims (5)

1. A structure integrating a rotating shaft and a flange pressing plate, comprising an output shaft (1) for connecting an angle grinder and a grinding slice (6), the rear end of the output shaft (1) is connected to the angle grinder, and the front end is connected to the grinding slice (6) and the locking nut (5), characterized in that the middle part of the output shaft (1) is provided with a support step, and the output shaft (1) is sequentially sleeved with a wedge flange (3), A clamping flange (2), a grinding section (6) and a locking nut (5), a part of the clamping flange (2) is sleeved on the output shaft (1), and the other part is sleeved on the wedge flange ( 3); taking the rotation direction of the output shaft (1) as the positive direction, the outer wall of the wedge-shaped flange (3) is provided with a positive rotating outer slope, and the inner wall of the clamping flange (2) is provided with a matching outer slope of the inner slope. 2. A structure integrating a rotating shaft and a flange pressing plate according to claim 1, characterized in that the inner slope of the clamping flange (2) and the outer slope of the wedge flange (3) contact the limit ;Clamping flange (2) rotates forward and moves to the rear end under the limit of the inclined plane, and the clamping flange (2) rotates in reverse to move to the front end under the limit of the inclined plane. 3. A structure integrating a rotating shaft and a flange pressing plate according to claim 1, characterized in that, the end face of the clamping flange (2) in close contact with the grinding section (6) is set as a dermatoglyphic surface, i.e. The end face is provided with cross-distributed linear protrusions. 4. An angle grinder, characterized in that the angle grinder adopts the structure of integrating a rotating shaft and a flange pressing plate according to any one of claims 1-3 to connect the grinding slices (6). 5. an assembling method of an angle grinder connecting grinding slices, characterized in that, adopting the structure of claim 3 integrating the rotating shaft and the flange pressing plate to connect the grinding slices (6), the concrete steps are: Step 1. Press-fit the wedge flange (3) onto the output shaft (1) with an interference fit; Step 2. Install the clamping flange (2) so that the inner inclined surface of the clamping flange (2) abuts on the outer inclined surface of the wedge flange (3); The skin texture surface of the tight flange (2); Step 4. Install the locking nut (5) to lock all the structures.

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