Groove cutting machine with grooving width adjusting function

Abstract

The utility model discloses a groove cutting machine with a grooving width adjusting function, which belongs to the field of cutting machines and comprises a motor, a protective cover, a lengthened shaft and a cutting blade. The protective cover is fixedly connected with a shell of the motor; the lengthening shaft is located in the protective cover, one end of the lengthening shaft is mechanically connected with the motor shaft, and the other end is rotatably connected with the side wall of the protective cover; the two cutting blades are in key connection with the lengthened shaft; the lengthened shaft is further provided with a fixed-length sleeve and two locking nuts, the fixed-length sleeve is located between the two cutting blades, and the two locking nuts are used for pressing the two cutting blades to the two ends of the fixed-length sleeve respectively; the protective cover is further provided with a notch used for exposing the two cutting blades. The grooving device is simple in structure and convenient to disassemble and assemble, the size and shape precision of grooving can be guaranteed at the same time, and the width of the groove can be adjusted conveniently.

Description

Technical Field

[0001] This utility model relates to the field of cutting machine technology, and in particular to a groove cutting machine with adjustable grooving width. Background Technology

[0002] Currently, people often use handheld cutting machines to cut materials. During the cutting process, the internal motor drives the cutting blade to rotate, which can cut materials such as wood or tiles. The cut tiles can be used for floor paving, while the cut wood can be used for furniture production or manufacturing.

[0003] In the existing technology, handheld cutting machines usually only include one cutting blade, so a single cutting action can only cut a slit in the material, which has little impact on the cutting of materials.

[0004] However, when grooving is required in materials, existing handheld cutting machines require two cutting operations to complete the grooving task. This method is not only inefficient but also results in insufficient grooving precision due to directional errors in the two cuts. Especially for large-volume grooving operations, the inefficiency and insufficient precision of existing handheld cutting machines become increasingly severe as working hours increase. Utility Model Content

[0005] In view of the problems of low efficiency and insufficient grooving accuracy of existing cutting machines when performing grooving operations, the purpose of this utility model is to provide a grooving cutting machine with grooving width adjustment function, so as to at least partially solve the above problems.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A grooving machine with adjustable grooving width includes a motor, a protective cover, an extension shaft, and cutting blades. The protective cover is fixedly connected to the housing of the motor, and a through hole is provided on the side wall of the protective cover for the motor shaft to pass through. The extension shaft is located inside the protective cover, with one end mechanically connected to the motor shaft and the other end rotatably connected to the side wall of the protective cover. There are two cutting blades, both keyed to the extension shaft. The extension shaft is also provided with a fixed-length sleeve and two locking nuts. The fixed-length sleeve is located between the two cutting blades, and the two locking nuts are used to press the two cutting blades together at both ends of the fixed-length sleeve. The protective cover also has a notch for exposing the two cutting blades.

[0008] In a preferred embodiment, the extended shaft is rotatably connected to the side wall of the protective cover via a bearing, and a bearing cap is detachably and fixedly connected to the side wall of the protective cover.

[0009] In a preferred embodiment, the end of the motor shaft is provided with a connecting portion with a non-circular cross-section, and the end face of the extended shaft is provided with a connecting hole adapted to the connecting portion.

[0010] In a preferred embodiment, the cross-section of the connecting portion is square or regular hexagonal.

[0011] In a preferred embodiment, the protective cover is cylindrical, and the axis of the protective cover coincides with the axis of the motor shaft.

[0012] In a preferred embodiment, the notch is formed on the circumferential sidewall of the protective cover, the notch is rectangular, and the notch extends to both end faces of the protective cover.

[0013] In a preferred embodiment, a handle is also fixedly installed at the end of the protective cover away from the motor.

[0014] In a preferred embodiment, the fixed-length sleeve includes a plurality of positioning rings, and the spacing between the two cutting blades can be changed by increasing or decreasing the number of the positioning rings.

[0015] The beneficial effects of this utility model by adopting the above technical solution are as follows: By adding an extension shaft and installing two key-connected cutting blades on the extension shaft, and then controlling the distance between the two cutting blades by a fixed-length sleeve, and pressing the two cutting blades to both ends of the fixed-length sleeve by two locking nuts, it is possible to cut two parallel slits on the material at the same time during cutting, thereby completing the grooving operation; in addition, by changing the length of the fixed-length sleeve, the width of the grooving can also be adjusted. At the same time, the cutting machine provided by this utility model has the advantages of simple structure and convenient disassembly and assembly. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0017] Figure 2 This is a left view of Embodiment 1 of the present invention;

[0018] Figure 3 This is a schematic diagram showing the installation of the two cutting blades on the extended shaft in this utility model;

[0019] Figure 4 This is a cross-sectional view of Embodiment 2 of the present invention.

[0020] In the diagram: 1-motor, 2-protective cover, 3-extended shaft, 4-cutting blade, 5-bearing, 6-bearing cap, 7-fixed length sleeve, 8-locking nut, 9-handle, 10-short sleeve, 11-motor shaft, 12-key, 13-axial keyway. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the description of the structure of this utility model shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] The terms "first" and "second" in this technical solution are merely designations for corresponding structures that are identical or similar, or that perform similar functions. They do not represent an arrangement of the importance of these structures, nor do they imply any ranking, comparison of size, or other meaning.

[0024] Furthermore, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two structures. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the overall concept and the specific context of the solution.

[0025] Example 1

[0026] like Figure 1-3 As shown, this utility model embodiment provides a groove cutting machine with adjustable grooving width, including a motor 1, a protective cover 2, an extension shaft 3, and a cutting blade 4.

[0027] Motor 1 is powered by a cable. A switch button is typically fixedly installed on motor 1 to control its power supply. Protective cover 2 is a cylindrical metal structure. The right sidewall of protective cover 2 is detachably and fixedly connected to the left sidewall of motor 1's housing by screws, and the axis of protective cover 2 is aligned with the axis of motor shaft 11 of motor 1. Additionally, a through hole is provided on the right sidewall of protective cover 2 for the motor shaft 11 to pass through.

[0028] An extension shaft 3 is arranged inside the protective cover 2, and its axis is configured to coincide with the axis of the protective cover 2 (i.e., the axis of the motor shaft 11). The right end of the extension shaft 3 is mechanically connected to the motor shaft 11, while its left end is rotatably connected to the left sidewall of the protective cover 2 via a bearing 5. In this embodiment, the end of the motor shaft 11 is provided with a connecting portion 12 with a non-circular cross-section. Correspondingly, a connecting hole adapted to the connecting portion 12 is provided on the right end face of the extension shaft 3. For example, the cross-section of the connecting portion 12 can be square or regular hexagonal. In this embodiment, a bearing cap 6 is also provided on the outer side of the left side wall of the protective cover 2. The bearing cap 6 is detachably fixed to the protective cover 2 by screws. At the same time, a step for installing the bearing 5 is provided on the left end of the extended shaft 3. The step is used to prevent the bearing 5 from moving to the right on the extended shaft 3. When the right end of the extended shaft 3 is connected to the motor shaft 11, the bearing 5 is just located in the bearing hole on the left side wall of the protective cover 2.

[0029] In this embodiment, two cutting blades 4 are configured, and both cutting blades 4 are connected to the extension shaft 3 by a key 12. For example, an axial keyway 13 is formed on the side wall of the extension shaft 3 along its axial direction, and the two ends of the axial keyway 13 are configured to extend to the two axial end faces of the extension shaft 3 respectively. Each cutting blade 4 is configured with a short key, and the length of the short key is equivalent to the thickness of the cutting blade 4.

[0030] In addition, the extension shaft 3 is also equipped with a fixed-length sleeve 7 and two locking nuts 8. The fixed-length sleeve 7 is sleeved on the extension shaft 3, and the inner wall of the fixed-length sleeve 7 is in clearance fit with the outer wall of the extension shaft 3. The fixed-length sleeve 7 is located between the two cutting blades 4, thereby limiting the distance between the two cutting blades 4. The two locking nuts 8 are screwed onto the left and right ends of the extension shaft 3, respectively. Both ends of the extension shaft 3 are provided with external threads, and the two locking nuts 8 are used to press the two cutting blades 4 tightly against the two ends of the fixed-length sleeve 7.

[0031] Thus, by replacing the fixed-length sleeves 7 with different lengths during use, the distance between the two cutting blades 4 can be changed, thereby cutting grooves of different widths.

[0032] In this embodiment, the protective cover 2 is also provided with a notch for exposing two cutting blades 4. The notch is specifically provided on the circumferential sidewall of the protective cover 2 and is configured to be rectangular. The notch is also configured to extend to the two end faces of the protective cover 2.

[0033] In addition, a handle 9 is fixedly installed on the right side wall of the protective cover 2. Usually, a handle is also installed on the housing of the motor 1. The handle and the handle 9 work together to allow the operator to easily lift the cutting machine for cutting operations.

[0034] Example 2

[0035] It is easy to understand that the external thread on the extended shaft 3 is not usually spread along the entire axial length of the extended shaft 3. Therefore, when the fixed length sleeve 7 is too short (the distance between the two cutting blades 4 is too small), it may cause the two locking nuts 8 to come off their respective external threads.

[0036] Therefore, as Figure 4 As shown, in this embodiment, a short sleeve 10 is further added between the locking nut 8 and the cutting blade 4. In this way, by adding a short sleeve 10 between the locking nut 8 and the cutting blade 4, the locking nut 8 can always be screwed onto the external thread of the extended shaft 3.

[0037] Example 3

[0038] In this embodiment, the fixed-length sleeve 7 includes several positioning rings, each with the same inner and outer diameters. Typically, the width (axial length) of each positioning ring is the same. Thus, during use, the axial length of the fixed-length sleeve 7 can be changed by increasing or decreasing the number of positioning rings, thereby changing the distance between the two cutting blades 4 and cutting grooves of different widths.

[0039] Of course, each positioning ring can also be configured to have a different width. For example, there are multiple width categories for positioning rings, and each width category has one or more positioning rings. When in use, by selecting the appropriate width category and the corresponding number of positioning rings, the positioning sleeve 7 of the required length can be assembled.

[0040] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A groove cutting machine with adjustable grooving width, characterized in that: The device includes a motor, a protective cover, an extension shaft, and cutting blades. The protective cover is fixedly connected to the housing of the motor, and a through hole is provided on the side wall of the protective cover for the motor shaft to pass through. The extension shaft is located inside the protective cover, with one end mechanically connected to the motor shaft and the other end rotatably connected to the side wall of the protective cover. There are two cutting blades, both keyed to the extension shaft. The extension shaft is also provided with a fixed-length sleeve and two locking nuts. The fixed-length sleeve is located between the two cutting blades, and the two locking nuts are used to press the two cutting blades to the two ends of the fixed-length sleeve, respectively. The protective cover also has a notch for exposing the two cutting blades.

2. The groove cutting machine with adjustable grooving width according to claim 1, characterized in that: The extended shaft is rotatably connected to the side wall of the protective cover via a bearing, and a bearing cap is detachably and fixedly connected to the side wall of the protective cover.

3. The groove cutting machine with adjustable grooving width according to claim 1, characterized in that: The end of the motor shaft is provided with a connecting part with a non-circular cross-section, and the end face of the extended shaft is provided with a connecting hole that is adapted to the connecting part.

4. The groove cutting machine with adjustable grooving width according to claim 3, characterized in that: The cross-section of the connecting part is square or regular hexagonal.

5. The groove cutting machine with adjustable grooving width according to claim 1, characterized in that: The protective cover is cylindrical, and the axis of the protective cover coincides with the axis of the motor shaft.

6. The groove cutting machine with adjustable grooving width according to claim 5, characterized in that: The notch is formed on the circumferential sidewall of the protective cover, the notch is rectangular, and the notch extends to both end faces of the protective cover.

7. The groove cutting machine with adjustable grooving width according to claim 1, characterized in that: A handle is also fixedly installed at the end of the protective cover away from the motor.

8. The groove cutting machine with adjustable grooving width according to claim 1, characterized in that: The fixed-length sleeve includes several positioning rings, and the distance between the two cutting blades can be changed by increasing or decreasing the number of positioning rings.

9. The groove cutting machine with adjustable grooving width according to claim 1, characterized in that: A short sleeve is also fitted on the extended shaft between the locking nut and the cutting blade.

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