Device easy to disassemble and assemble blade

Abstract

The utility model relates to a device easy to disassemble and assemble a blade, and the device comprises a housing, the outer surface of which is provided with a connecting sleeve extending upwards in an inclined manner; the fixing frame is mounted below the machine shell; the working shaft is rotatably installed in the machine shell, and the working shaft penetrates through the fixing frame and then extends towards the outer portion of the fixing frame; the lower pressing piece is synchronously and rotationally connected to the working shaft, and limiting holes are formed in the circumferential direction of the lower pressing piece; the limiting pin is movably mounted on one side of the fixing frame; the limiting pin can be inserted into a limiting hole of the downward pressing piece when moving, and therefore the downward pressing piece and the working shaft are prevented from rotating. According to the utility model, the design structure is reasonable, the movable limiting pin can be inserted into the limiting hole of the downward pressing piece in the process of mounting or dismounting the blade, so that the downward pressing piece and the working shaft are limited in the circumferential direction, the problem of rotation of the working shaft in the process of dismounting the blade is avoided, the working difficulty is reduced, and the working efficiency is improved. And meanwhile, the safety when the blade is disassembled and assembled is also improved.

Description

Technical Field

[0001] This application relates to the field of blade mounting technology for lawnmowers or cutters, and in particular to a device for easy blade mounting and dismounting. Background Technology

[0002] Currently, in existing cutting or grinding equipment (such as cutting machines, lawnmowers, etc.), the rotating blades (or grinding discs) are mainly mounted on the machine's working shaft. When the motor is running, it drives the rotating blades to rotate, thereby achieving the cutting or grinding work. Since the working shaft can easily rotate when not in operation, and the blades need to be replaced after use or during maintenance, the traditional disassembly method requires one hand to hold the blade in place while the other hand uses a wrench to turn the nut to remove the blade. This is not only difficult to operate but also poses certain safety risks. Similarly, installing the blades also presents problems of difficult assembly and low safety. Therefore, there is an urgent need for a device that facilitates the disassembly and assembly of blades to solve the above problems. Utility Model Content

[0003] To address the problems of high operational difficulty and low safety in the disassembly and assembly of existing blades as mentioned in the background art, this application provides a device that facilitates the disassembly and assembly of blades.

[0004] The device for easy blade disassembly and assembly provided in this application adopts the following technical solution:

[0005] A device for easy blade removal and installation includes:

[0006] The housing has an upwardly extending connecting sleeve on its outer surface;

[0007] A mounting bracket is installed below the casing;

[0008] The working shaft is rotatably mounted inside the housing, and extends outward from the fixed frame after passing through it.

[0009] The pressing component is synchronously rotatably connected to the working shaft, and has a limit hole in its circumferential direction;

[0010] The limit pin is movably mounted on one side of the fixed frame;

[0011] The limiting pin can be inserted into the limiting hole of the pressing part when it moves, thereby preventing the pressing part from rotating with the working shaft.

[0012] By adopting the above technical solution, during the installation or removal of the blade, a movable limiting pin can be inserted into the limiting hole of the pressing part to achieve circumferential limiting of the pressing part and the working shaft, thereby avoiding the problem of the working shaft rotating during the installation and removal of the blade, reducing the difficulty of the work, and improving the safety of the installation and removal of the blade; the inclined upward connecting sleeve can make it easy for the axis of the working shaft to be perpendicular to the ground during operation, improving the cutting effect.

[0013] Optionally, the pressing member is connected to the working shaft via a spline.

[0014] The above technical solution is used to achieve synchronous rotational connection between the pressing component and the working shaft.

[0015] Optionally, the lower surface of the fixing frame has a downwardly extending fixing ring, which is coaxially arranged with the working shaft. The outer diameter of the fixing ring is smaller than the inner diameter of the pressing member, and a clearance groove is provided on the outer wall of the fixing ring near the limiting pin.

[0016] By adopting the above technical solution, the pressing component can surround the fixing ring. On the one hand, it can increase the structural size of the pressing component, thereby making better contact with the blade and improving the structural stability after the blade is installed. On the other hand, it can prevent some debris from entering the interior of the fixing frame during the working process, thus playing a certain role in shielding and protecting it. The provided clearance groove can facilitate the limit pin to completely pass through the limit hole of the pressing component, improving the limiting effect.

[0017] Optionally, the limiting pin has a T-shaped cross-section and is slidably installed in a through hole on the side of the fixing frame. One end of the pin passes through the through hole and extends toward the working shaft, with a baffle plate installed at the end. A spring is sleeved on the outside of the limiting pin, with one end of the spring abutting against the head of the T-shaped structure of the limiting pin and the other end abutting against the stepped part in the through hole.

[0018] By adopting the above technical solution, under normal conditions, the limiting pin is in the outermost limit position under the action of the spring, which will not cause interference to the normal rotation of the blade. When the blade is disassembled or assembled, the elastic force of the spring can be overcome by simply pressing the limiting pin, so that the limiting pin is inserted into the limiting hole of the pressing part.

[0019] Optionally, the connecting sleeve of the housing has a slot near its end, the length of the slot is consistent with the axial direction of the connecting sleeve, and there are outward protrusions on both sides of the slot near the end of the connecting sleeve. The protrusions have mounting holes, and the connecting sleeve has threaded holes on its outer wall.

[0020] By adopting the above technical solution, the handle can be inserted into the connecting sleeve. On the one hand, a bolt can be inserted into the mounting hole to reduce the diameter of the connecting sleeve opening, thereby increasing the friction between the connecting sleeve and the handle. On the other hand, by inserting a screw into the threaded hole, the handle and the connecting sleeve can be further fixed, improving the installation stability of the handle and the connecting sleeve.

[0021] Optional, also includes:

[0022] An upper pressing component is sleeved on a working shaft, and the blade is positioned between the upper pressing component and the lower pressing component;

[0023] A protective cover, which is fitted onto the working shaft;

[0024] A nut, which is threaded onto the end of a working shaft.

[0025] By adopting the above technical solution, the upper and lower pressure components are in direct contact with the blade. The protective cover and the upper pressure component can be pressed down by tightening the lock nut to fix the blade.

[0026] Optionally, a cover is also included, which is mounted on the top of the casing and has multiple ventilation holes on its surface.

[0027] By adopting the above technical solution, the motor can be installed inside the housing, protected by the housing, and the heat dissipation holes can achieve the heat dissipation effect.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] This utility model has a reasonable design structure. During the installation or removal of the blade, a movable limiting pin can be inserted into the limiting hole of the pressing part to limit the pressing part and the working shaft in the circumferential direction, thereby avoiding the problem of the working shaft rotating during the installation and removal of the blade, reducing the difficulty of the work, and improving the safety when installing and removing the blade. Attached Figure Description

[0030] Figure 1 This is a three-dimensional representation of the present invention. Figure 1 ;

[0031] Figure 2 This is a three-dimensional representation of the present invention. Figure 2 ;

[0032] Figure 3 This is a cross-sectional view of the present invention;

[0033] Figure 4 This is a utility model Figure 3 A magnified view of a portion of the view;

[0034] Figure 5This is a perspective view of the pressing component of this utility model;

[0035] Figure 6 This is a perspective view of the casing of this utility model.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Machine cover; 2. Machine housing; 201. Connecting sleeve; 2011. Groove; 2012. Protrusion; 2013. Mounting hole; 2014. Threaded hole; 3. Fixing bracket; 301. Fixing ring; 302. Relief groove; 4. Limiting pin; 5. Spring; 6. Baffle; 7. Working shaft; 8. Lower pressing component; 801. Internal spline; 802. Limiting hole; 9. Upper pressing component; 10. Protective cover; 11. Nut; 12. Stepped part. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the accompanying drawings.

[0039] like Figure 1-6 As shown in the figure, this application discloses a device for easy blade removal and installation, comprising:

[0040] The housing 2 has an upwardly extending connecting sleeve 201 on its outer surface. When the housing 2 is placed horizontally (i.e., the blade axis is perpendicular to the ground), the center line of the connecting sleeve 201 is at an angle of 30° to the horizontal plane. The connecting sleeve 201 has a slot 2011 near its end, and the length direction of the slot 2011 is consistent with the axis direction of the connecting sleeve 201. There are outwardly protruding protrusions 2012 on both sides of the slot 2011 near the end of the connecting sleeve 201. The protrusions 2012 have mounting holes 2013. The connecting sleeve 2011 has a threaded hole 2014 on its outer wall. The slot 2011 is designed to facilitate the insertion of the handle into the connecting sleeve 201. After the bolt is inserted into the mounting hole 2013, the distance between the two protrusions 2012 is reduced, thereby locking the handle. After the screw is inserted into the threaded hole 2014, the end of the screw abuts against the outer wall of the handle, which enhances the structural stability of the handle after installation.

[0041] The mounting bracket 3 is installed below the housing 2;

[0042] The working shaft 7 is rotatably installed inside the housing 2, and extends outward from the fixed frame 3 after passing through the fixed frame 3. In this example, a motor is installed inside the housing 2, and the output shaft of the motor is the working shaft 7. When the motor rotates, the working shaft 7 rotates, thereby causing the blade mounted on it to rotate as well.

[0043] The pressing component 8 is synchronously rotatably connected to the working shaft 7. A limiting hole 802 is opened in the circumferential direction of the pressing component 8. In this example, the pressing component 8 and the working shaft 7 are connected by a spline, that is, an internal spline 801 is opened in the center of the pressing component 8, and an external spline is opened in the circumferential direction of the working shaft 7, so that the working shaft 7 and the pressing component 8 can rotate synchronously and have a better power transmission effect. In addition, a key strip connection or other connection methods can also be used, the main purpose of which is to enable the pressing component 8 to rotate synchronously with the working shaft 7.

[0044] The limiting pin 4 is movably installed on one side of the fixed frame 3. Specifically, the limiting pin 4 has a T-shaped cross section. The limiting pin 4 is slidably installed in the through hole on the side of the fixed frame 3. One end of the pin passes through the through hole and extends towards the working shaft 7, and a baffle 6 is installed at the end. A spring 5 is sleeved on the outside of the limiting pin 4. One end of the spring 5 abuts against the head of the T-shaped structure of the limiting pin 4, and the other end abuts against the step portion 12 in the through hole. In this example, the central axis of the limiting pin 4 is perpendicular to and intersects the central axis of the working shaft 7.

[0045] The limiting pin 4 can be inserted into the limiting hole 802 of the pressing member 8 when it moves, thereby preventing the pressing member 8 from rotating with the working shaft 7.

[0046] Specifically, the lower surface of the fixing frame 3 has a downwardly extending fixing ring 301. The fixing ring 301 is coaxially arranged with the working shaft 7. The outer diameter of the fixing ring 301 is smaller than the inner diameter of the pressing member 8. A relief groove 302 is provided on the outer wall of the fixing ring 301 near the limiting pin 4. In this example, the central axis of the relief groove 302 coincides with the central axis of the limiting pin 4.

[0047] Specifically, it also includes:

[0048] Upper pressing member 9 is sleeved on working shaft 7, and the blade is positioned between upper pressing member 9 and lower pressing member 8;

[0049] Protective cover 10 is fitted onto the working shaft 7;

[0050] Nut 11 is threaded onto the end of working shaft 7.

[0051] Specifically, it also includes a cover 1, which is installed on top of the housing 2 and has multiple heat dissipation holes on its surface.

[0052] In use, this easy-to-install and remove blade device allows the limit pin 4 on the side of the fixing bracket 3 to move towards the working shaft 7 by pressing it. This allows the limit pin 4 to insert into the limit hole 802 of the lower pressure member 8, thus restricting the rotation of the lower pressure member 8. Since the lower pressure member 8 is synchronously connected to the working shaft 7, it can restrict the rotation of the working shaft 7. At this time, by turning the nut 11 with a wrench, the nut 11 can be easily removed or tightened while the working shaft 7 is stationary, achieving quick installation and removal of the blade.

[0053] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for easy blade assembly and disassembly, characterized in that, include: The outer surface of the housing (2) is provided with an inclined upward-extending connecting sleeve (201). A mounting bracket (3) is installed below the housing (2); The working shaft (7) is rotatably mounted inside the housing (2), and the working shaft (7) extends outward from the fixed frame (3) after passing through the fixed frame (3); The pressing part (8) is synchronously connected to the working shaft (7) and has a limit hole (802) in its circumferential direction. The limiting pin (4) is movably installed on one side of the fixed frame (3); The limiting pin (4) can be inserted into the limiting hole (802) of the pressing member (8) when it moves, thereby preventing the pressing member (8) from rotating with the working shaft (7).

2. The device for easy blade disassembly and assembly according to claim 1, characterized in that, The pressing component (8) is connected to the working shaft (7) via a spline.

3. The device for easy blade disassembly and assembly according to claim 1, characterized in that, The lower surface of the fixed frame (3) has a downwardly extending fixed ring (301). The fixed ring (301) is coaxially arranged with the working shaft (7). The outer diameter of the fixed ring (301) is smaller than the inner diameter of the pressing part (8). A relief groove (302) is provided on the outer wall of the fixed ring (301) near the limit pin (4).

4. The device for easy blade disassembly and assembly according to claim 1, characterized in that, The limiting pin (4) has a T-shaped cross section. The limiting pin (4) is slidably installed in the through hole on the side of the fixing frame (3). One end of the pin passes through the through hole and extends towards the working shaft (7), and a baffle (6) is installed at the end. A spring (5) is sleeved on the outside of the limiting pin (4). One end of the spring (5) abuts against the head of the T-shaped structure of the limiting pin (4), and the other end abuts against the step (12) in the through hole.

5. The device for easy blade disassembly and assembly according to claim 1, characterized in that, The connecting sleeve (201) of the housing (2) has a slot (2011) near its end. The length direction of the slot (2011) is consistent with the axial direction of the connecting sleeve (201). There are outward protrusions (2012) on both sides of the slot (2011) and near the end of the connecting sleeve (201). There are mounting holes (2013) at the protrusions (2012) and threaded holes (2014) on the outer wall of the connecting sleeve (201).

6. The device for easy blade disassembly and assembly according to claim 1, characterized in that, Also includes: The upper pressing member (9) is sleeved on the working shaft (7), and the blade is positioned between the upper pressing member (9) and the lower pressing member (8); A protective cover (10) is fitted onto the working shaft (7); Nut (11), which is threaded onto the end of working shaft (7).

7. The device for easy blade disassembly and assembly according to claim 1, characterized in that, It also includes a cover (1), which is installed on top of the casing (2) and has multiple heat dissipation holes on its surface.

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