Electric grinder

Abstract

The utility model provides an electric grinder and belongs to the technical field of machining equipment. The receiving shaft is located in the shell and rotationally connected with the shell, and the receiving shaft is used for being detachably connected with a machining accessory; the locking assembly comprises a gear piece fixedly arranged on the side face of the receiving shaft, and a tooth piece is arranged in the shell; wherein the tooth piece is provided with a locking position and an unlocking position relative to the gear piece, and when the tooth piece is located at the locking position, the tooth piece is meshed with the gear piece, so that the receiving shaft is locked relative to the shell and cannot rotate; when the tooth piece is located at the unlocking position, the tooth piece is separated from the gear piece, and the receiving shaft can rotate relative to the shell; the device has the advantages that when the tooth piece is close to the gear piece, the teeth on the tooth piece can be inserted into the at least one gear gap on the gear piece, so that the gear pieces can be meshed, the receiving shaft can be prevented from rotating, the receiving shaft is locked, and the replacement efficiency of the machining accessory is improved.

Description

Technical Field

[0001] This utility model belongs to the field of processing equipment technology, and in particular relates to an electric mill. Background Technology

[0002] An electric grinder, also known as an electric abrasive grinder, is a power tool that uses a grinding wheel or disc for sanding. It can be used with various abrasives for cutting, trimming, shaping, grinding, and polishing both metallic and non-metallic materials. Because electric grinders can be used with various grinding heads, specific heads can be selected and installed as needed. However, when the grinding head wears out after prolonged use, it needs to be replaced. Since the grinding head rotates synchronously with the output shaft of the drive motor, disassembling the grinding head requires manually or with other tools to hold the output shaft relatively stationary before unscrewing it in the opposite direction. Furthermore, without a secured output shaft, the grinding head is difficult to tighten. This method of changing grinding heads is inconvenient, especially when the motor has just stopped, as the output shaft still has significant inertia and continues to rotate. Changing the grinding head at this time not only makes positioning difficult but also increases the risk of injury to the operator's hands, posing a safety hazard and resulting in low work efficiency. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an electric mill that can lock the output shaft when changing machining accessories.

[0004] The objective of this utility model can be achieved through the following technical solution: an electric mill, comprising:

[0005] case;

[0006] A receiving shaft, located inside the housing and rotatably connected to the housing, is used for detachable connection with a processing accessory;

[0007] A locking assembly, the locking assembly including a gear fixedly disposed on the side of the receiving shaft, and a gear condition being provided inside the housing;

[0008] The tooth condition has a locked position and an unlocked position relative to the gear component. When the tooth condition is in the locked position, the tooth condition meshes with the gear component, so that the receiving shaft is locked relative to the housing and cannot rotate.

[0009] When the gear condition is in the unlocked position, the gear condition is disengaged from the gear component, and the receiving shaft can rotate relative to the housing.

[0010] In the aforementioned electric grinder, the tooth condition can move linearly relative to the housing to switch between an unlocked position and a locked position.

[0011] In the aforementioned electric mill, all teeth on the gear condition and all teeth on the gear component are arc-shaped teeth.

[0012] In the aforementioned electric mill, the tooth condition includes multiple meshing teeth, and the multiple meshing teeth are distributed in an arc shape.

[0013] In the aforementioned electric grinder, a sliding part is fixedly provided on the tooth conditioner, and a guide part extending in a straight line is provided inside the housing. The sliding part and the guide part are slidably engaged, and the sliding direction of the sliding part is perpendicular to the rotation axis of the receiving shaft.

[0014] In one of the above-mentioned electric grinders, a locking button is provided on the tooth conditioner. When the tooth conditioner is in the unlocked position, the locking button protrudes from the housing.

[0015] In the aforementioned electric grinder, a first elastic element is provided inside the housing. The first elastic element is configured to deform under force when the tooth condition is in the locked position, and after the force on the tooth condition is removed, the tooth condition switches to the unlocked position under the action of elastic force.

[0016] In one of the above-mentioned electric mills, a start button is provided on the housing, and the start button is movable relative to the housing;

[0017] When the start button is in the first working position, the electric mill is in working condition, and the start button is locked in place with the gear condition, so the locking button cannot be activated.

[0018] When the start button is in the second working position, the electric mill is in a non-working state, and the locking button can switch between the unlock position and the locking position.

[0019] In the aforementioned electric mill, the direction of movement of the start button is perpendicular to the direction of movement of the gear condition.

[0020] In the aforementioned electric grinder, a second elastic element is provided inside the housing. The second elastic element is configured to deform under force when the start push button is in the first working position, and after the force on the start push button is removed, the start push button switches to the second working position under the action of elastic force.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: In order to quickly lock the rotation of the receiving shaft when changing processing accessories, a gear component is provided on the receiving shaft. Multiple teeth on the gear component are distributed around the side of the receiving shaft. When the tooth component approaches the gear component, the tooth on the tooth component can be inserted into at least one gear gap on the gear component, thereby realizing the meshing of the gear components and preventing the receiving shaft from rotating, thus locking the receiving shaft and increasing the efficiency of changing processing accessories. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the internal structure of the shell;

[0023] Figure 2 This is a diagram illustrating the state after the lock button is pressed;

[0024] Figure 3 This is a schematic diagram showing the interaction between the start push button and the lock button;

[0025] Figure 4 This is a schematic diagram of the shell structure;

[0026] Figure 5 This is a schematic diagram of the connection structure between the locking button and the tooth condition.

[0027] In the figure, housing 100; receiving shaft 101; gear component 102; gear condition 103; limiting part 104; limiting cavity 105; connecting rod 106; locking button 107; start push button 108; insertion part 109; locking cavity 110. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] like Figures 1-5 As shown, an electric mill includes:

[0031] Casing 100;

[0032] A receiving shaft 101 is located inside the housing 100 and is rotatably connected to the housing 100. The receiving shaft 101 is used for detachable connection with the processing accessory.

[0033] The locking assembly includes a gear 102 fixedly disposed on the side of the receiving shaft 101, and a toothed condition 103 is provided inside the housing 100.

[0034] Among them, the tooth condition 103 has a locked position and an unlocked position relative to the gear component 102. When the tooth condition 103 is in the locked position, the tooth condition 103 meshes with the gear component 102, so that the receiving shaft 101 is locked relative to the housing 100 and cannot rotate.

[0035] When the gear condition 103 is in the unlocked position, the gear condition 103 is disengaged from the gear component 102, and the receiving shaft 101 can rotate relative to the housing 100.

[0036] In this embodiment, in order to quickly lock the rotation of the receiving shaft 101 when changing processing accessories, a gear component 102 is provided on the receiving shaft 101. Multiple teeth on the gear component 102 are distributed around the side of the receiving shaft 101. When the tooth condition 103 approaches the gear component 102, the teeth on the tooth condition 103 can be inserted into at least one gear gap on the gear component 102, thereby achieving meshing between the gear components 102 and preventing the receiving shaft 101 from rotating, thus locking the receiving shaft 101 and increasing the efficiency of changing processing accessories.

[0037] More preferably, the tooth condition 103 is capable of linear movement relative to the housing 100 to switch between the unlocked position and the locked position.

[0038] In this embodiment, the linearly moving tooth condition 103 can quickly and accurately switch between the unlocked and locked positions, and the linear movement design does not require too much space to achieve the switching action, which is conducive to the compact design of the overall structure of the electric grinder.

[0039] It is worth mentioning that if the tops of the teeth on the tooth condition 103 and the gear component 102 are flat, then during the meshing process of the tooth condition 103 and the gear component 102, a situation may occur that hinders the meshing of the two. That is, when the top of the tooth on the tooth condition 103 abuts against the top of the tooth on the gear component 102, the linear movement of the gear component 102 will be blocked and it will be unable to lock the receiving shaft 101. Therefore, in order to avoid the above situation, all the teeth on the tooth condition 103 and all the teeth on the gear component 102 are set to be arc-shaped teeth. Then, when the tops of the teeth on the two abut against each other, under the guiding action of the arc, the receiving shaft 101 will rotate under the force and cause the gear component 102 to mesh with the tooth condition 103.

[0040] like Figure 5As shown, in a further preferred embodiment, the tooth condition 103 includes multiple meshing teeth, and the multiple meshing teeth are distributed in an arc shape. The meshing force between the multiple teeth can increase the stable connection between the gear component 102 and the tooth condition 103. At the same time, the arc-shaped distribution makes the structure of the tooth condition 103 more compact and reduces the installation space required in the electric grinder.

[0041] Specifically, a sliding part is fixedly provided on the tooth condition 103, and a guide part extending in a straight line is provided inside the housing 100. The sliding part and the guide part slide together, and the sliding direction of the sliding part is perpendicular to the rotation axis of the receiving shaft 101.

[0042] In this embodiment, as an optional solution, the sliding part is a connecting rod 106 fixedly mounted on the tooth condition 103, and the guiding part is a limiting block 104 fixedly mounted in the housing 100. The limiting block 104 is provided with a limiting cavity 105. The connecting rod 106 extends into the limiting cavity 105 and can slide relative to the cavity wall of the limiting cavity 105. The moving direction of the connecting rod 106 is perpendicular to the rotation axis of the receiving shaft 101. The tooth condition 103 and the connecting rod 106 move synchronously to achieve linear movement of the tooth condition 103.

[0043] It is worth mentioning that, in order to facilitate the movement of the connecting rod 106, a locking button 107 is fixedly provided on the gear condition 103. When the electric grinder is in working condition, the locking button 107 extends out of the housing 100.

[0044] Specifically, the tooth condition 103 and the locking button 107 are fixed together by the connecting rod 106. So when it is necessary to lock the receiving shaft 101, the locking button 107 can be pressed. The locking button 107 will cause the connecting rod 106 and the tooth condition 103 to move synchronously.

[0045] More preferably, a first elastic element is provided inside the housing 100. The first elastic element is configured to deform under force when the tooth condition 103 is in the locked position, and after the force on the tooth condition 103 is removed, the tooth condition 103 switches to the unlocked position under the action of the elastic force.

[0046] In this embodiment, the presence of the first elastic element allows the connecting rod 106 to automatically reset under the action of elastic force and release the locking between the gear condition 103 and the gear component 102 when the control of the connecting rod 106 is removed. As an optional solution, the elastic element can be a spring, which is sleeved on the connecting rod 106, and the two ends of the spring abut against the limiting part and the locking button 107 respectively.

[0047] More preferably, the housing 100 is provided with a start button 108, which is movable relative to the housing 100;

[0048] When the start button 108 is in the first working position, the electric mill is in working state, and the start button 108 is locked with the gear condition 103, and the locking button 107 cannot be started.

[0049] When the start button 108 is in the second working position, the electric mill is in a non-working state, and the lock button 107 can switch between the unlocked position and the locked position.

[0050] In this embodiment, the working state of the electric mill is controlled by the start push button 108. That is, by switching the position of the start push button 108 on the housing 100, the start and stop state of the motor that drives the receiving shaft 101 is controlled. At the same time, in order to ensure that the gear component 102 and the gear condition 103 will not mesh and lock the receiving shaft 101 when the start push button 108 is in the first working position and the motor is started, the start push button 108 and the gear condition 103 are locked together. This is because locking the receiving shaft 101 when the electric mill is working will cause the high-speed rotating component to be suddenly obstructed, which may lead to serious consequences such as motor overload, gear damage, and even endanger the safety of the operator.

[0051] Further preferably, the movement direction of the start push button 108 is perpendicular to the movement direction of the gear condition 103. This further optimizes the user experience and reduces the possibility of accidental operation. The vertical orientation makes the operating areas of the two buttons relatively independent, so that when the user operates one button, it is less likely to accidentally press the other. For example, in actual operation, users are accustomed to using specific gestures and actions to operate the start push button 108 (such as horizontal sliding), while the vertical operation direction of the lock button 107 (such as vertical pressing) is different. This reduces the probability of accidental pressing due to operating habits and improves the accuracy and safety of operation.

[0052] Specifically, the start push button 108 is fixedly provided with an insertion part 109, and the locking button 107 is provided with a locking cavity 110. When the start push button 108 is in the first working position, the insertion part 109 extends into the locking cavity 110. This insertion-type locking structure is simple and effective, and can withstand a certain external force without easily unlocking, ensuring the reliability of locking during the operation of the electric mill. When the start push button 108 leaves the first working position, the insertion part 109 can disengage from the locking cavity 110, and the locking button 107 returns to operability.

[0053] More preferably, a second elastic element is provided inside the housing 100. The second elastic element is configured to deform under force when the start push button 108 is in the first working position, and after the force on the start push button 108 is removed, the start push button 108 switches to the second working position under the action of the elastic force.

[0054] In this embodiment, the presence of the second elastic element allows the start push button 108 to automatically reset to the second working position under the action of elastic force when the control of the start push button 108 is removed, and releases the locking connection between the start push button 108 and the locking button 107.

[0055] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0057] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An electric grinder, characterized in that, include: case; A receiving shaft, located inside the housing and rotatably connected to the housing, is used for detachable connection with a processing accessory; A locking assembly, the locking assembly including a gear fixedly disposed on the side of the receiving shaft, and a gear condition being provided inside the housing; The tooth condition has a locked position and an unlocked position relative to the gear component. When the tooth condition is in the locked position, the tooth condition meshes with the gear component, so that the receiving shaft is locked relative to the housing and cannot rotate. When the gear condition is in the unlocked position, the gear condition is disengaged from the gear component, and the receiving shaft can rotate relative to the housing.

2. The electric mill according to claim 1, characterized in that, The tooth condition can move linearly relative to the housing to switch between the unlocked and locked positions.

3. The electric mill according to claim 1, characterized in that, All teeth on the tooth condition and all teeth on the gear component are arc-shaped teeth.

4. An electric mill according to claim 1 or 3, characterized in that, The tooth condition includes multiple meshing teeth, and the multiple meshing teeth are distributed in an arc shape.

5. An electric mill according to claim 2, characterized in that, A sliding part is fixedly provided on the tooth condition, and a guide part extending in a straight line is provided inside the housing. The sliding part and the guide part are slidably engaged, and the sliding direction of the sliding part is perpendicular to the rotation axis of the receiving shaft.

6. An electric mill according to claim 1, characterized in that, A locking button is provided on the tooth conditioner. When the tooth conditioner is in the unlocked position, the locking button protrudes from the housing.

7. An electric mill according to claim 1, characterized in that, The housing is provided with a first elastic element, which is configured to deform under force when the tooth condition is in the locked position, and after the force on the tooth condition is removed, the tooth condition switches to the unlocked position under the action of elastic force.

8. An electric mill according to claim 6, characterized in that, The housing is provided with a start button, which is movable relative to the housing; When the start button is in the first working position, the electric mill is in working condition, and the start button is locked in place with the gear condition, so the locking button cannot be activated. When the start button is in the second working position, the electric mill is in a non-working state, and the locking button can switch between the unlock position and the locking position.

9. An electric mill according to claim 8, characterized in that, The direction of movement of the start push button is perpendicular to the direction of movement of the gear condition.

10. An electric mill according to claim 8, characterized in that, The housing is provided with a second elastic element, which is configured to deform under force when the start push button is in the first working position, and after the force on the start push button is removed, the start push button switches to the second working position under the action of elastic force.

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