Limiting device for limiting machining length of workpiece and electric tool assembly

Abstract

The utility model discloses a limiting device for limiting the machining length of a workpiece and an electric tool assembly, the limiting device is used for being matched with a tool (P) for machining the workpiece, and the limiting device comprises a guide rail extending in the machining length direction of the machined workpiece; the first stop element can slide along the guide rail; the tool stop block can slide along the guide rail; one end of the elastic element is fixedly arranged, and the other end is connected with the tool stop block; the positioning assembly is connected with the first stop element so as to fix the first stop element at a target length position on the guide rail; when an external force is applied to slide the tool stop block to a target length position along the guide rail, the tool stop block is stopped by the first stop element, so that the tool synchronously moving with the tool stop block is stopped at the target length position; when the tool stop block is released, the tool stop block drives the tool to return to the initial station along the guide rail under the action of reset elastic force of the elastic element.

Description

Technical Field

[0001] The utility model relates to a limiting device, in particular to a limiting device used in conjunction with a workpiece processing tool. Background Art

[0002] In actual usage scenarios, when an operator cuts a workpiece, he or she often needs to cut the workpiece to a specific length.

[0003] At present, the way to solve this technical problem is mostly for the operator to measure the required length on the workpiece to be cut, then make a length mark at a certain point on the workpiece, and then stop at this position when using the processing tool to cut the workpiece, thereby achieving fixed-length processing.

[0004] It can be seen that this manual measurement method is inefficient. When multiple workpieces of a certain length need to be processed, the operator needs to measure each workpiece once, which obviously seriously affects the operating efficiency.

[0005] Another solution is to sense the position of the tool through a sensor, so that the tool stops processing at the set position. However, such sensor-based devices often fail due to harsh operating environments, such as high dust content. Utility Model Content

[0006] One of the purposes of the utility model is to provide a limiting device for limiting the processing length of a workpiece, which adopts a fully mechanical structure to determine the processing length of the workpiece, and has a simple structure, is easy to operate, and has low cost.

[0007] In order to achieve the above-mentioned purpose, the utility model proposes a limiting device for limiting the processing length of a workpiece, which is used to cooperate with a tool for processing the workpiece, and the limiting device includes:

[0008] A guide rail, which is arranged to extend along a processing length direction of a workpiece to be processed;

[0009] a first stopper element, which is disposed on the guide rail and is capable of sliding along the guide rail;

[0010] A tool stop block, which is used to be connected to the tool, and the tool stop block is arranged on the guide rail and can slide along the guide rail;

[0011] An elastic component, comprising an elastic element, one end of which is fixedly arranged, and the other end of which is connected to the tool stop block;

[0012] a positioning assembly connected to the first stop element to fix the first stop element at a target length position on the guide rail;

[0013] When an external force is applied to slide the tool stop block (4) along the guide rail (1) to the target length position, the tool stop block (4) is blocked by the first stop element (2) so that the tool moving synchronously with the tool stop block stops at the target length position; when the tool stop block is released, it drives the tool to return to the starting position along the guide rail under the action of the restoring elastic force of the elastic element.

[0014] Furthermore, in the limiting device described in the utility model, the first stopping element has a stopping arm extending outward.

[0015] Further, in the position limiting device of the present utility model, the first stop element has a hollow cavity; the positioning assembly includes:

[0016] A knob, the lower part of which is disposed in the cavity of the first stopper element, and the knob can rotate around its own axis;

[0017] A nut, which is coaxially disposed in the knob and moves synchronously with the knob;

[0018] A screw, which is threadedly connected to the nut;

[0019] The knob is rotated to move the screw rod in the height direction, so as to fix and clamp the first stop element at a target length position on the guide rail.

[0020] Furthermore, in the limiting device described in the utility model, the nut is configured as a threaded section located on the inner wall of the knob.

[0021] Furthermore, in the limiting device described in the utility model, the nut and the knob are connected by interference fit.

[0022] Furthermore, in the limiting device described in the utility model, the upper outer wall of the knob is provided with a corrugated portion.

[0023] Furthermore, in the limiting device described in the utility model, a second stopping element is also provided on the guide rail, which limits the movement of the workpiece being processed.

[0024] Furthermore, in the position limiting device described in the utility model, a scale element is also provided on the guide rail.

[0025] Furthermore, in the limiting device described in the utility model, the positioning assembly also includes a gasket, which is arranged between the screw rod and the guide rail.

[0026] Furthermore, in the limiting device described in the utility model, the elastic element includes an elastic rope.

[0027] Furthermore, the elastic component also includes a fixed pulley, which is fixed in the guide rail, and the elastic rope passes around the fixed pulley and is arranged in the guide rail.

[0028] Another object of the utility model is to provide an electric tool assembly, which can perform fixed-length processing on a workpiece to be processed based on a limiting device of a fully mechanical structure, thereby greatly improving the convenience of operation.

[0029] Based on the above purpose, the utility model provides an electric tool assembly, which includes an electric tool body and a limiting device as described above. The electric tool body is the tool for processing a workpiece, and the electric tool body is configured to be able to slide along the length direction of the guide rail.

[0030] The limiting device for limiting the processing length of a workpiece of the utility model adopts a fully mechanical structure to determine the processing length of the workpiece, so that the failure of the device caused by the sensor measuring the processing length can be avoided.

[0031] The position limiting device for limiting the processing length of a workpiece of the utility model determines the processing length by setting the position of the first stop element on the guide rail, which greatly improves the production efficiency compared with the manual measurement of the operator.

[0032] The limiting device for limiting the processing length of a workpiece of the utility model enables the tool and the tool stop block to act synchronously by setting a tool stop block matched with the first stop element, thereby improving the convenience of operation.

[0033] The limiting device for limiting the processing length of a workpiece disclosed by the utility model has a simple structure, is easy to operate and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The figure shows a state in which the tool stop block and the tool are away from the first stop element in one embodiment of the utility model.

[0035] Figure 2 The figure shows a state in which a tool stop block and a tool are blocked by a first stop element in one embodiment of the utility model.

[0036] Figure 3 The figure shows a state in which a tool stop block of the position limiting device described in the utility model is located at a starting position in one embodiment.

[0037] Figure 4 A cross-sectional view showing a state in which a tool stop block of a position limiting device according to the utility model is located at a starting position in one embodiment.

[0038] Figure 5The figure shows a state in which the tool stop block is blocked by the first stop element in one embodiment of the utility model.

[0039] Figure 6 A cross-sectional view showing a state in which a tool stop block is blocked by a first stop element in one embodiment of the utility model.

[0040] Figure 7 A schematic diagram of the split structure of a partial structure of the limiting device described in the utility model in one embodiment is shown.

[0041] Figure 8 A schematic diagram of the external structure of a partial structure of the limiting device described in the utility model in one embodiment is shown.

[0042] Fig. 9 A cross-sectional view of a limiting device according to the utility model is shown in one embodiment.

[0043] Fig.10 A side view of another embodiment of the limiting device of the present invention is shown. DETAILED DESCRIPTION

[0044] The limiting device for limiting the processing length of a workpiece described in the present invention will be further explained and illustrated below in conjunction with the drawings and specific embodiments of the specification. However, such explanation and illustration do not constitute an improper limitation on the technical solution of the present invention.

[0045] In actual usage scenarios, when an operator processes a workpiece, such as cutting, the operator often needs to cut the workpiece to a specific length.

[0046] The fixed-length cutting method currently used is that the operator measures the required length on the workpiece to be cut, then marks the length at a certain point on the workpiece, and then stops at this position when using the processing tool to cut the workpiece, thereby achieving fixed-length processing. However, this operation method is inefficient.

[0047] Another solution is to sense the position of the tool through a sensor so that the tool stays at a set target length position, but such a sensor-based device often fails.

[0048] In view of the above technical problems, the present invention provides a limiting device for limiting the processing length of a workpiece in one embodiment. The limiting device is used to cooperate with a tool for processing the workpiece, for example Figure 1 and Figure 2 A tool P is shown by way of example. In a specific example, the tool may be an electric circular saw for cutting a workpiece.

[0049] However, those skilled in the art will appreciate that the tool for processing the workpiece may not be an electric tool, and any tool that can process the workpiece is applicable to the present invention.

[0050] Figure 3 The figure shows a state in which a tool stop block of the limiting device described in the utility model is located at a starting position in one embodiment, and the first stop element is not shown in the figure.

[0051] Figure 4 A cross-sectional view showing a state in which a tool stop block of a positioning device according to the present invention is located at a starting position in one embodiment, wherein the first stop element is not shown.

[0052] like Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the limiting device may include:

[0053] The guide rail 1 is disposed on a setting plane, such as the surface of a support or the surface of an operating platform, and is extended along the processing length direction of the workpiece to be processed. The tool P can slide along the guide rail 1 .

[0054] The first stop element 2 is slidably disposed on the guide rail 1, and when not positioned, the first stop element 2 can slide freely along the extension direction of the guide rail 1. Of course, in some more specific embodiments, in order to prevent the first stop element 2 from falling off the guide rail 1, travel limit blocks can also be provided at both ends of the guide rail in the length direction.

[0055] The tool stopper 4 connected to the tool P is also disposed on the guide rail 1 and can slide along the guide rail 1. In some embodiments, since the tool stopper 4 and the first stopper element 2 are both disposed beside the tool P, the tool stopper 4 and the first stopper element 2 slide with the tool P along different slide grooves on the guide rail 1, and these slide grooves are parallel to each other.

[0056] The tool stop block 4 is connected to the guide rail 1 via an elastic component. The elastic component includes an elastic element 71, one end 712 of the elastic element 71 is fixedly arranged, and the other end of the elastic element 71 is connected to the tool stop block 4.

[0057] The positioning assembly 3 is connected to the first stop element 2 to fix the first stop element at a target length position on the guide rail. For example, in one example, the target length position may be a position 30 cm away from the processing starting position.

[0058] Figure 1The tool P is shown to be at a starting position of processing, such as a cutting starting position. When starting cutting, the tool P starts cutting a workpiece (not shown) at the starting position.

[0059] Next, an external force is applied, such as holding and pushing the tool P, so that the tool stopper 4 and the tool P slide along the guide rail 1 toward the left side of the figure. During this process, the tool P continues to cut the workpiece, that is, the cutting length of the workpiece continues to increase until it reaches Figure 2 , Figure 5 and Figure 6 When the target length position is shown, the tool stop block 4 is blocked by the first stop element 2 and cannot move further forward (i.e., toward the left side in the figure). At this time, the tool P that moves synchronously with the tool stop block 4 stops at the target length position, and the tool P stops, thereby realizing a fixed-length cutting from the starting position to the target length position.

[0060] When the tool stopper 4 is released, the tool P is driven to return to the position as shown in FIG. Figure 1 , Figure 3 and Figure 4 Starting position shown.

[0061] In some embodiments of the present invention, the tool P and the tool stop block 4 can be connected together by a connector or by gluing to achieve synchronous movement of the two.

[0062] In some other embodiments, the tool P may also be connected to the tool stopper block 4 only to achieve the synchronous action of feeding to the left and resetting to the right. Figures 1 to 6 In the orientation shown, the tool P (or the protrusion thereon) is arranged on the right side of the tool stop block 4 and contacts the right side surface of the tool stop block 4. At this time, an external force is applied to the tool P to move to the left, and the tool P pushes the tool stop block 4 to slide to the left along the guide rail 1 to the target length position until the tool stop block 4 is blocked by the first stop element 2 and cannot move further forward (i.e., toward the left side in the figure).

[0063] When the processing is completed, the tool stop block 4 is released by removing the external force applied to the tool P. At this time, the tool stop block 4 pushes the tool P to move to the right under the action of the elastic element 71 until it returns to the starting position.

[0064] In some more specific embodiments, the elastic element 71 can be configured as an elastic cord.

[0065] Of course, in some other more specific embodiments, the elastic element 71 can be constructed as a spring or a similar elastic device.

[0066] In addition, when the elastic element is configured as an elastic cord, such as Figure 4 and Figure 6 As shown, the elastic rope can be repeatedly set multiple times in the guide rail through the fixed pulley 72, so as to ensure that within the limited stroke of the tool stop block, the elastic element can provide it with a sufficiently large elastic force to achieve reset.

[0067] In addition, in the limiting device described in the present invention, the positioning assembly 3 for positioning the first stop element 2 can have multiple implementation methods.

[0068] Figure 7 A schematic diagram of the split structure of the limiting device described in the utility model in one embodiment is shown.

[0069] Figure 8 A schematic diagram of the external structure of the limiting device described in the utility model in one embodiment is shown.

[0070] Fig. 9 A cross-sectional view of a limiting device according to the utility model is shown in one embodiment.

[0071] As an implementation method, Figure 7 , Figure 8 and Fig. 9 As shown, the first stopper element 2 can be slidably connected to the guide rail 1 through a slide groove 21 provided on the guide rail 1. The first stopper element 2 can be configured to have a hollow cavity, and the positioning assembly is disposed in the hollow cavity. This configuration can make the structure of the entire limiting device more compact, and can also prevent the limiting device from interfering with other devices or components around it.

[0072] The positioning assembly may include: a knob 31, the lower part of which is disposed in the cavity of the first stopper element 2, and the knob 31 can rotate around its own axis; a nut 32, which is disposed in the knob 31 and is coaxially disposed with the knob 31, and when the knob rotates, the nut rotates synchronously with the knob; and a screw rod 33 threadedly connected with the nut 32. In this way, when the knob 31 is rotated, the nut 32 is driven to rotate synchronously with the knob 31, and the screw rod 33 is driven to move in the height direction.

[0073] exist Fig. 9 In the illustrated embodiment, when the screw moves upward in the height direction, it will fix and clamp the first stop element 2 on the guide rail 1, thereby fixing the first stop element 2 at a target length position.

[0074] However, in other embodiments, the clamping surface of the screw rod may be set as the end surface of its large head end, and when the screw rod moves downward in the height direction, it will fix the first stop element on the guide rail, thereby fixing the first stop element at the target length position.

[0075] In addition, Figure 7 and Fig. 9 In the illustrated embodiment, the nut 32 is provided as a separate component independent of the knob 31. In order to achieve synchronous action of the nut 32 and the knob, the nut 32 is fixedly connected to the knob 31. In some more specific embodiments, the nut 32 and the knob 31 can be fixedly connected by interference fit. In some other more specific embodiments, the nut 32 and the knob 31 can also be fixedly connected by gluing or welding or similar methods.

[0076] In other embodiments, the nut 32 may also be integrally provided with the knob 31 , for example, the nut is provided as a threaded section located on the inner wall of the knob.

[0077] In some more specific embodiments, in order to further ensure stable transmission of the clamping force, the positioning assembly may further include a gasket 34 , which is disposed between the screw 33 and the guide rail 1 .

[0078] In some more specific embodiments, in order to facilitate applying force to the knob to make it rotate, such as Figure 7 As shown, a corrugated portion 311 may be provided on the upper outer wall of the knob to increase friction.

[0079] In some other embodiments, the positioning assembly may also be constructed to include at least a positioning pin and a plurality of positioning holes, wherein the positioning holes may be arranged on the guide rail, and their positions are pre-calibrated to determine the set processing settings, and when the first stop element slides to the target length position, the positioning pin is inserted into the positioning hole to prevent the first stop element from sliding further. Figure 7 , Figure 8 and Fig. 9 The positioning assembly shown has a low degree of adjustment freedom and cannot achieve stepless adjustment of the processing length.

[0080] In addition, in some embodiments, Figure 7 As shown, the first stop element 2 has an outwardly projecting stop arm 22 which is used to block the tool stop block 4 .

[0081] In some other embodiments, the stop arm may not be provided, but the tool stop block 4 may be blocked by the body of the first stop element.

[0082] In addition, in some preferred embodiments, Figure 1 and Figure 2 As shown, the guide rail 1 is also provided with a scale element 5. By providing the scale element 5, the position of the first stop element 2 can be more accurately calibrated, which is similar to the following Figure 7 , Figure 8 and Fig. 9 The cooperation of the positioning components shown can realize stepless adjustment of the processing length.

[0083] Of course, in some other embodiments, no specific scale element may be provided, but some pre-calibrated position marks may be provided to represent the processing length.

[0084] In addition, in some embodiments of the present invention, a second stop element 6 for limiting the movement of the workpiece may be provided on the guide rail 1. Fig.10 As shown, in order to prevent the second stop element 6 from interfering with the first stop element 2 , the first stop element 2 and the second stop element 6 are respectively disposed on the upper surface and the lower surface of the guide rail 1 .

[0085] Another embodiment of the present invention further provides an electric tool assembly, which includes an electric tool body and the above-mentioned limiting device. The electric tool body is the tool P mentioned above, and the electric tool body can also slide along the length direction of the guide rail 1.

[0086] It should be noted that the terms “upper”, “lower”, “left” and “right” described in this article are for ease of understanding and are based on Figures 1 to 10 This is an exemplary description of the setting method and direction of the limiting device, which is not intended to limit the present invention.

[0087] It should be noted that the prior art part in the protection scope of the utility model is not limited to the embodiments given in the application documents. All prior art that does not contradict the scheme of the utility model, including but not limited to prior patent documents, prior public publications, prior public uses, etc., can be included in the protection scope of the utility model.

[0088] In addition, the combination of the various technical features in this case is not limited to the combination described in the claims of this case or the combination described in the specific embodiments. All technical features recorded in this case can be freely combined or combined in any way unless there is a contradiction between them.

[0089] It should also be noted that the above-listed embodiments are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and similar changes or modifications made therewith are directly derived or easily associated with the contents disclosed by those skilled in the art from the present invention, and should all fall within the protection scope of the present invention.

Claims

1. A limiting device for limiting the processing length of a workpiece, which is used to cooperate with a tool (P) for processing the workpiece, characterized in that: The limiting device comprises: A guide rail (1) is arranged to extend along a processing length direction of a workpiece to be processed; A first stop element (2), which is disposed on the guide rail (1) and is capable of sliding along the guide rail (1); a tool stop block (4) used for connecting with the tool (P), the tool stop block being arranged on the guide rail (1) and being able to slide along the guide rail (1); An elastic component, comprising an elastic element (71), one end of which is fixedly arranged, and the other end of which is connected to the tool stop block (4); a positioning assembly (3) connected to the first stop element (2) to fix the first stop element at a target length position on the guide rail; When an external force is applied to slide the tool stop block (4) along the guide rail (1) to the target length position, the tool stop block (4) is blocked by the first stop element (2) so that the tool moving synchronously with the tool stop block stops at the target length position; when the tool stop block is released, it drives the tool to return to the starting position along the guide rail under the action of the restoring elastic force of the elastic element.

2. The limiting device according to claim 1, characterized in that: The first stop element (2) has a stop arm (22) protruding outward.

3. The limiting device according to claim 1, characterized in that: The first stop element (2) has a hollow cavity; the positioning assembly (3) comprises: A knob (31), the lower part of which is arranged in the cavity of the first stop element, and the knob can rotate around its own axis; A nut (32) is coaxially disposed inside the knob (31) and moves synchronously with the knob; A screw (33) threadedly connected to the nut (32); The knob (31) is rotated to move the screw rod (33) in the height direction, so as to fix and clamp the first stop element at a target length position on the guide rail.

4. The limiting device according to claim 3, characterized in that: The nut (32) is configured as a threaded section located on the inner wall of the knob (31).

5. The limiting device according to claim 3, characterized in that: The nut (32) is connected to the knob (31) through interference fit.

6. The limiting device according to claim 3, characterized in that: The upper outer wall of the knob (31) is provided with a corrugated portion (311).

7. The limiting device according to claim 1, characterized in that: The guide rail (1) is also provided with a second stop element (6) which limits the movement of the workpiece being processed.

8. The limiting device according to claim 1, characterized in that: The guide rail (1) is also provided with a scale element (5).

9. The limiting device according to claim 3, characterized in that: The positioning assembly (3) also includes a gasket (34) which is arranged between the screw rod and the guide rail.

10. The limiting device according to claim 1, characterized in that: The elastic element comprises an elastic cord.

11. The limiting device according to claim 10, characterized in that: The elastic component also includes a fixed pulley (72) which is fixedly arranged in the guide rail (1), and the elastic rope passes around the fixed pulley and is arranged in the guide rail.

12. An electric tool assembly, comprising an electric tool body, characterized in that: It also includes a limiting device as described in any one of claims 1 to 11, the electric tool body is the tool for processing a workpiece, and the electric tool body is configured to be able to slide along the length direction of the guide rail.

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