Anti-jumping tooth structure of electric scissors

Abstract

The utility model belongs to electric scissors technical field, especially related to a kind of anti-tooth jumping structure of electric scissors, including mounting seat, driving device and shearing mechanism are set on mounting seat, shearing mechanism includes moving blade and fixed blade, fixed blade is fixedly set on mounting seat, moving blade rotation is set on mounting seat, the driving device includes bevel gear rotation setting on mounting seat, gear portion that moving blade is set with the adaptation of bevel gear, limit protrusion is set on mounting seat, limit protrusion is set on the side of gear portion away from bevel gear, limit protrusion side close to gear portion is provided with limit wall, support ball is rotationally set in limit protrusion, support ball is from limit wall and leans on gear portion, the utility model's purpose is to provide a kind of anti-tooth jumping structure of electric scissors with long service life and little noise.

Description

Technical Field

[0001] This utility model belongs to the field of electric scissors technology, and specifically relates to an anti-skid tooth structure for electric scissors. Background Technology

[0002] Electric scissors are handheld power tools that use an electric motor as power and drive the working head through a transmission mechanism to perform cutting operations.

[0003] Most electric scissors on the market today include two blades. During use, a motor drives one blade to swing via a transmission mechanism, causing both blades to perform cutting operations. For example, Chinese utility model patent application CN202222403134.0 discloses an improved anti-slip tooth electric scissors, which includes a base for mounting various components. The base has a fixing plate and a swing blade, and an output tooth. One side of the base is connected to the fixing plate via a fixing seat. The fixing seat has a connecting shaft with a gear component that meshes with the output tooth. A pressure plate is mounted on the gear component, and the pressure plate is locked to the fixing seat by a fixing member. The pressure plate has at least one movable component. The fixing plate and the fixing seat are fixed together by a locking member, and the pressure plate is located between the locking member and the output tooth. This structure better prevents tooth skipping or slippage.

[0004] Although the pressure plate in the above structure can prevent the gear components and output teeth from skipping or slipping, the oscillating blade will generate a lot of friction with the pressure plate during use, which will cause wear on the oscillating blade and the pressure plate, affecting the service life of the electric scissors. In addition, this structure generates a lot of noise during use, affecting the normal use by the user. Summary of the Invention

[0005] In order to overcome the defects in the prior art, the purpose of this utility model is to provide an anti-skipping tooth structure for electric scissors with a long service life and low noise.

[0006] The purpose of this utility model is achieved as follows:

[0007] An anti-skid tooth structure for electric scissors includes a mounting base, on which a drive device and a cutting mechanism are mounted. The cutting mechanism includes a movable blade and a fixed blade. The fixed blade is fixedly mounted on the mounting base, and the movable blade is rotatably mounted on the mounting base. The drive device includes a bevel gear rotatably mounted on the mounting base. The movable blade has a gear portion adapted to the bevel gear. The mounting base has a limiting protrusion located on the side of the gear portion away from the bevel gear. A limiting wall is provided on the side of the limiting protrusion closest to the gear portion. A support ball is rotatably mounted in the limiting protrusion, and the support ball passes through the limiting wall and abuts against the gear portion.

[0008] The present invention is further configured such that: a rotating groove is provided in the limiting protrusion, the side wall of the rotating groove penetrates the limiting wall and forms a constriction, one side of the supporting ball can pass through the constriction, and the end of the constriction can abut against the supporting ball and prevent the supporting ball from detaching from the rotating groove through the constriction, the end of the rotating groove is provided with an installation port for the supporting ball to pass through the groove, and a baffle is provided in or on one side of the installation port to prevent the supporting ball from detaching from the installation port.

[0009] The present invention is further configured such that: the supporting ball is cylindrical, and the length of the rotating groove is greater than the length of the supporting ball; the end of the supporting ball is housed in the rotating groove, and the baffle wall is pressed against the end of the rotating groove.

[0010] The present invention is further configured such that: the driving device is disposed at one end of the mounting base, the moving blade and the fixed blade extend out from the other end of the mounting base, the mounting opening is disposed at the end of the limiting protrusion away from the driving device or away from the gear part, the mounting base is detachably provided with fasteners, and the baffle is disposed on the fasteners.

[0011] The present invention is further configured such that: the fastener includes a screw threadedly connected to the mounting base, the screw is disposed on one side of the rotating groove, a washer is sleeved on the screw, the washer extends to the end of the mounting opening, and a baffle is disposed on the washer.

[0012] The present invention is further configured such that: the driving device includes a connecting sleeve detachably connected to the mounting base, and a baffle is disposed on the connecting sleeve; when the driving device is connected to the mounting base, the baffle is installed at the end of the mounting opening.

[0013] The present invention is further configured such that: the driving device is provided with a first threaded portion, the mounting base is provided with a second threaded portion adapted to the first threaded portion, a baffle is provided at one end of the first threaded portion, a rotating groove is provided at the end of the second threaded portion, and the second threaded portion is provided with a clearance groove corresponding to the rotating groove, and the supporting ball passes through the clearance groove and is installed in the rotating groove.

[0014] The present invention is further configured such that: the mounting base is provided with a mounting cavity, the bevel gear is rotatably disposed in the mounting cavity, and the side of the mounting cavity is provided with an opening, a limiting protrusion is provided on one side of the opening, and the bevel gear passes through the opening and meshes with the gear part.

[0015] The present invention is further configured such that: a storage groove for storing the gear is formed between the limiting protrusion and the opening, and an inclined guide surface is provided on the upper end of the limiting protrusion near the opening.

[0016] The present invention is further configured such that the lower end of the rotating groove extends toward the bottom of the storage groove and extends below the storage groove.

[0017] The advantages of this utility model compared to the prior art are:

[0018] 1. In this utility model, the upper end of the limiting protrusion supports and limits the gear part by supporting the roller, which can prevent the bevel gear and the gear part from separating during use. Since the supporting ball is rotated in the limiting protrusion, it helps to reduce the friction between the gear part and the supporting ball during use, which helps to extend the service life of the electric scissors. In addition, this structure can reduce the noise generated by the friction between the gear part and the supporting ball during use, making it convenient for users.

[0019] 2. In this utility model, the rotating groove facilitates the installation of the support ball, while the constricted opening facilitates the contact between the support ball and the gear and prevents the support ball from detaching from the rotating groove. The mounting hole and baffle facilitate the disassembly and installation of the support ball, making the assembly and production of electric scissors convenient. The cylindrical support ball facilitates the contact between the support ball and the gear and increases the contact surface between them, preventing excessive stress at the contact point that could damage the support ball and gear, thus extending the service life of the electric scissors. Furthermore, since the length of the rotating groove is greater than the length of the support ball, the baffle avoids pressing against the support ball and affecting its free rotation, which helps reduce damage to the support ball and gear and lowers the noise of the electric scissors.

[0020] 3. The fastener structure in this utility model is simple, easy to disassemble and install, and facilitates the disassembly and installation of the supporting ball bearings, making it convenient for the assembly, production, disassembly, and maintenance of electric scissors. The setting of screws and washers helps to keep the threaded hole away from the rotating groove, and manufacturers can use standard screws and washers, which facilitates the production and processing of electric scissors.

[0021] 4. The baffle wall set on the connecting sleeve in this utility model helps to reduce the types of parts of the electric scissors, facilitates the assembly and production of electric scissors, and the baffle wall is not easy to shift or loosen in this structure, which is conducive to the stable installation of the support ball; when the support ball is close to the gear part, the rotating groove will be set at one end of the second thread part, and the setting of the clearance groove facilitates the installation of the support ball, making the support ball closer to the gear part, which helps to reduce the volume of the connecting sleeve.

[0022] 5. The mounting cavity and opening in this utility model facilitate stable installation of the bevel gear and reduce contact between the bevel gear and other objects, preventing accidental damage to the bevel gear. The opening and limiting protrusion limit the relative tilt angle between the gear and the bevel gear, which is beneficial for meshing. The storage groove reduces the swing of the gear during use and facilitates stable installation of the moving blade. The guide surface facilitates the installation of the gear in the storage groove, making the assembly and production of electric scissors convenient. The rotating groove extending to the bottom of the storage groove facilitates contact between the lower end of the gear and the supporting ball, preventing the lower end of the gear from contacting the limiting wall, which would cause severe wear on the gear. This helps extend the service life of the electric scissors and reduce their noise. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model;

[0024] Figure 2 This is a cross-sectional view of Embodiment 1 of this utility model;

[0025] Figure 3 This is an exploded view of Embodiment 1 of this utility model;

[0026] Figure 4 This is a schematic diagram of the mounting base in Embodiment 1 of this utility model;

[0027] Figure 5 This is a cross-sectional view of the mounting base in Embodiment 1 of this utility model;

[0028] Figure 6 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0029] Figure 7 This is a cross-sectional view of Embodiment 2 of this utility model;

[0030] Figure 8 This is an exploded view of Embodiment 2 of this utility model;

[0031] Figure 9 This is a schematic diagram of the mounting base in Embodiment 2 of this utility model;

[0032] Figure 10 This is a cross-sectional view of the mounting base in Embodiment 2 of this utility model;

[0033] Figure 11 This is a schematic diagram of the connecting sleeve in this utility model.

[0034] The labels in the diagram mean: 1-Mounting base; 11-Limiting protrusion; 12-Mounting cavity; 13-Opening; 14-Receiving groove; 15-Rotating groove; 16-Threaded hole; 17-Second threaded part; 111-Limiting wall; 112-Guide surface;

[0035] 171-Void groove; 2-Drive device; 21-Drive motor; 22-Connecting sleeve; 23-Bevel gear;

[0036] 221-First threaded part; 3-Fixed insert; 4-Moving insert; 41-Gear part; 5-Hinged rod; 6-Support ball; 7-Fastener; 71-Screw; 72-Washer; 73-Baffle. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0038] See Figures 1 to 11 As shown, an anti-skid tooth structure for electric scissors includes a mounting base 1, on which a drive device 2 and a cutting mechanism are mounted. The cutting mechanism includes a movable blade 4 and a fixed blade 3. The fixed blade 3 is fixedly mounted on the mounting base 1, and the movable blade 4 is rotatably mounted on the mounting base 1 via a hinge rod 5. The drive device 2 includes a bevel gear 23 rotatably mounted on the mounting base 1. The movable blade 4 is provided with a part 41 adapted to the bevel gear 23. The mounting base 1 is provided with a limiting protrusion 11, which is located on the side of the part 41 away from the bevel gear 23 and on the side of the part 41 close to the part 41. The structure includes a limiting wall 111 and a supporting ball 6 rotatably disposed within the limiting protrusion 11. The supporting ball 6 passes through the limiting wall 111 and abuts against 41. In this structure, the supporting roller at the upper end of the limiting protrusion 11 supports and limits 41, which can prevent the bevel gear 23 from disengaging from 41 during use. Furthermore, since the supporting ball 6 is rotatably disposed within the limiting protrusion 11, it helps to reduce the friction between 41 and the supporting ball 6 during use, which helps to extend the service life of the electric scissors. This structure can also reduce the noise generated by the friction between 41 and the supporting ball 6 during use, making it more convenient for users.

[0039] The limiting protrusion 11 of this utility model is provided with a rotating groove 15. The side wall of the rotating groove 15 penetrates the limiting wall 111 and forms a constriction. One side of the supporting ball 6 can pass through the constriction, and the end of the constriction can abut against the supporting ball 6 and prevent the supporting ball 6 from detaching from the rotating groove 15 through the constriction. The end of the rotating groove 15 is provided with an installation port for the supporting ball 6 to pass through the groove. A baffle 73 is provided in or on one side of the installation port to prevent the supporting ball 6 from detaching from the installation port. The rotating groove 15 facilitates the installation of the supporting ball 6, while the constriction facilitates the contact between the supporting ball 6 and 41 and can prevent the supporting ball 6 from detaching from the rotating groove 15. The installation hole and the baffle 73 facilitate the disassembly and installation of the supporting ball 6 and facilitate the assembly and production of electric scissors.

[0040] The aforementioned constriction is an opening with a width smaller than the diameter of the rotating groove 15. Since the constriction is not easily shown in the structural schematic diagram and coincides with the limiting wall 111 in the sectional view, it is not specifically indicated in the accompanying drawings of the specification. However, those skilled in the art can implement this technical solution by combining the contents of the specification and the accompanying drawings.

[0041] The support ball 6 is cylindrical. The cylindrical shape of the support ball 6 facilitates contact between the support ball 6 and 41, and helps to increase the contact surface between the support ball 6 and 41. This avoids excessive stress at the contact position between the support ball 6 and 41, which could lead to damage to the support ball 6 and 41, and helps to extend the service life of the electric scissors.

[0042] Preferably, the length of the rotating groove 15 is greater than the length of the supporting ball 6. The end of the supporting ball 6 is housed in the rotating groove 15, and the baffle 73 is pressed against the end of the rotating groove 15. This structure can prevent the baffle 73 from pressing against the supporting ball 6 and affecting the free rotation of the supporting ball 6, which is beneficial to reducing the damage to the supporting ball 6 and 41, and reducing the noise of the electric scissors.

[0043] The mounting base 1 is provided with a mounting cavity 12, and the bevel gear 23 is rotatably mounted in the mounting cavity 12. An opening 13 is provided on the side of the mounting cavity 12, and a limiting protrusion 11 is provided on one side of the opening 13. The bevel gear 23 passes through the opening 13 and meshes with 41. The mounting cavity 12 and the opening 13 facilitate the stable installation of the bevel gear 23 and help reduce the contact between the bevel gear 23 and other objects, avoiding accidental damage to the bevel gear 23. In addition, the opening 13 and the limiting protrusion can limit the relative tilt angle between 41 and the bevel gear 23, which is beneficial to the meshing of 41 and the bevel gear 23.

[0044] In this utility model, a storage groove 14 for storing 41 is formed between the limiting protrusion 11 and the opening 13. An inclined guide surface 112 is provided on the upper end of the limiting protrusion 11 near the opening 13. The storage groove 14 is designed to reduce the swing of 41 during use and facilitates the stable installation of the moving blade 4. The guide surface 112 is designed to facilitate the installation of 41 in the storage groove 14 and facilitates the assembly and production of electric scissors.

[0045] Preferably, the lower end of the rotating groove 15 extends towards the bottom of the storage groove 14 and extends below the storage groove 14. The rotating groove 15 extending below the storage groove 14 facilitates the contact between the lower end of 41 and the supporting ball 6, avoids the lower end of 41 contacting the limiting wall 111, which would cause severe wear of 41, thus helping to extend the service life of the electric scissors and reduce the noise of the electric scissors.

[0046] The mounting port described in this utility model can be located at one end of the mounting base 1 near the driving device 2, or it can be located at the other end of the mounting base 1 near the driving device 2. The implementation method is as follows:

[0047] Example 1

[0048] In this embodiment, the drive device 2 is located at one end of the mounting base 1, and the moving blade 4 and the fixed blade 3 extend from the other end of the mounting base 1. The mounting port is located at the end of the limiting protrusion 11 away from the drive device 2 or away from the side of 41. The mounting base 1 is detachably provided with a fastener 7, and the baffle 73 is provided on the fastener 7. The fastener 7 has a simple structure, is easy to disassemble and install, facilitates the disassembly and installation of the supporting ball 6, and facilitates the assembly, production, disassembly and maintenance of the electric scissors.

[0049] The mounting base 1 is provided with a threaded hole 16. The fastener 7 can be a bolt, which is threadedly connected to the threaded hole 16. The bolt head extends to the end of the rotating groove 15. The baffle 73 is provided at the lower end of the bolt head. In this embodiment, the fastener 7 preferably includes a screw 71 that is threadedly connected to the threaded hole 16. The screw 71 is provided on one side of the rotating groove 15. A washer 72 is fitted on the screw 71. The washer 72 extends to the end of the mounting opening, and the baffle 73 is provided on the washer 72. The arrangement of the screw 71 and the washer 72 is conducive to keeping the threaded hole 16 away from the rotating groove 15. Moreover, the manufacturer can use standard screws 71 and washer 72, which is convenient for the production and processing of electric scissors.

[0050] Example 2

[0051] In this embodiment, the drive device 2 includes a connecting sleeve 22 that is detachably connected to the mounting base 1, and a baffle 73 is disposed on the connecting sleeve 22. When the drive device 2 is connected to the mounting base 1, the baffle 73 is installed at the end of the mounting opening. The baffle 73 disposed on the connecting sleeve 22 helps to reduce the types of parts of the electric scissors, facilitates the assembly and production of the electric scissors, and the baffle 73 in this structure is not easy to shift or loosen, which is conducive to the stable installation of the ball bearing 6.

[0052] In this embodiment, the driving device 2 includes a driving motor 21, and a connecting sleeve 22 is detachably connected to the driving motor 21. The connecting sleeve 22 is provided with a reduction gear set for connecting the driving motor 21 and the bevel gear 23. The reduction gear set is not shown in the accompanying drawings of this utility model, but those skilled in the art can implement this technical solution based on the description in the specification.

[0053] The drive device 2 is provided with a first threaded portion 221, and the mounting base 1 is provided with a second threaded portion 17 adapted to the first threaded portion 221. In this structure, the rotating groove 15 is provided at the end of the second threaded portion 17 or on one side of the end of the second threaded portion 17. However, when the rotating groove 15 is provided on one side of the end of the second threaded portion 17, the limiting protrusion 11 needs to be larger. Therefore, it is preferable that the baffle 73 is provided at one end of the first threaded portion 221, the rotating groove 15 is provided at the end of the second threaded portion 17, and the second threaded portion 17 is provided with a clearance groove 171 corresponding to the rotating groove 15. The support ball 6 passes through the clearance groove 171 and is installed in the rotating groove 15. The clearance groove 171 facilitates the installation of the support ball 6, making the support ball 6 closer to 41, which helps to reduce the volume of the connecting sleeve 22.

[0054] In this embodiment, the clearance groove 171 is provided at the end of the rotating groove 15. In order to make the first threaded part 221 and the second threaded part 17 stably connected, it is preferable that the width of the clearance groove 171 corresponds to the arc of the second threaded part 17 being less than 90 degrees.

[0055] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. An anti-skid tooth structure for electric scissors, comprising a mounting base (1), a driving device (2) and a cutting mechanism are provided on the mounting base (1), the cutting mechanism comprising a moving blade (4) and a fixed blade (3), the fixed blade (3) being fixedly mounted on the mounting base (1), and the moving blade (4) being rotatably mounted on the mounting base (1), characterized in that: The drive device (2) includes a bevel gear (23) rotatably mounted on the mounting base (1), a gear part (41) adapted to the bevel gear (23) on the moving blade (4), a limiting protrusion (11) on the mounting base (1), the limiting protrusion (11) is located on the side of the gear part (41) away from the bevel gear (23), a limiting wall (111) is provided on the side of the limiting protrusion (11) close to the gear part (41), a support ball (6) is rotatably mounted in the limiting protrusion (11), the support ball (6) passes through the limiting wall (111) and abuts against the gear part (41).

2. The anti-skipping tooth structure of an electric scissors according to claim 1, characterized in that: The limiting protrusion (11) is provided with a rotating groove (15). The side wall of the rotating groove (15) penetrates the limiting wall (111) and forms a constriction. One side of the supporting ball (6) can pass through the constriction, and the end of the constriction can abut against the supporting ball (6) and prevent the supporting ball (6) from detaching from the rotating groove (15) through the constriction. The end of the rotating groove (15) is provided with an installation port for the supporting ball (6) to pass through the groove. A baffle (73) is provided in or on one side of the installation port to prevent the supporting ball (6) from detaching from the installation port.

3. The anti-skipping tooth structure of an electric scissors according to claim 2, characterized in that: The support ball (6) is cylindrical, and the length of the rotating groove (15) is greater than the length of the support ball (6). The end of the support ball (6) is housed in the rotating groove (15), and the baffle (73) abuts against the end of the rotating groove (15).

4. The anti-skipping tooth structure of an electric scissors according to claim 2, characterized in that: The drive device (2) is located at one end of the mounting base (1), and the moving blade (4) and the fixed blade (3) extend from the other end of the mounting base (1). The mounting port is located at the end of the limiting protrusion (11) away from the drive device (2) or away from the gear part (41). The mounting base (1) is detachably provided with a fastener (7), and the baffle (73) is provided on the fastener (7).

5. The anti-skipping tooth structure of an electric scissors according to claim 4, characterized in that: The fastener (7) includes a screw (71) threadedly connected to the mounting base (1), the screw (71) being disposed on one side of the rotating groove (15), a washer (72) being fitted on the screw (71), the washer (72) extending to the end of the mounting opening, and a baffle (73) being disposed on the washer (72).

6. The anti-skipping tooth structure of an electric scissors according to claim 2, characterized in that: The drive device (2) includes a connecting sleeve (22) that is detachably connected to the mounting base (1), and a baffle (73) is provided on the connecting sleeve (22); when the drive device (2) is connected to the mounting base (1), the baffle (73) is installed at the end of the mounting port.

7. The anti-skipping tooth structure of an electric scissors according to claim 6, characterized in that: The drive device (2) is provided with a first threaded part (221), the mounting base (1) is provided with a second threaded part (17) adapted to the first threaded part (221), the baffle (73) is provided at one end of the first threaded part (221), the rotating groove (15) is provided at the end of the second threaded part (17), and the second threaded part (17) is provided with a clearance groove (171) corresponding to the rotating groove (15). The support ball (6) passes through the clearance groove (171) and is installed in the rotating groove (15).

8. The anti-skipping tooth structure of an electric scissors according to claim 2, characterized in that: The mounting base (1) is provided with a mounting cavity (12), a bevel gear (23) is rotatably disposed in the mounting cavity (12), and an opening (13) is provided on the side of the mounting cavity (12). A limiting protrusion (11) is disposed on one side of the opening (13), and the bevel gear (23) passes through the opening (13) and meshes with the gear part (41).

9. The anti-skipping tooth structure of an electric scissors according to claim 8, characterized in that: The limiting protrusion (11) and the opening (13) form a receiving groove (14) for receiving the gear part (41), and an inclined guide surface (112) is provided on the upper end of the limiting protrusion (11) near the opening (13).

10. The anti-skipping tooth structure of an electric scissors according to claim 9, characterized in that: The lower end of the rotating groove (15) extends toward the bottom of the storage groove (14) and extends below the storage groove (14).

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