Lithium battery type double-wheel different-direction cutting saw

Abstract

The utility model relates to the technical field of cutting saw transmission, in particular to a lithium battery type double-wheel different-direction cutting saw. Comprising a handle frame; the two 36V lithium battery packs are connected in series with each other; the terminal sockets are respectively arranged on the handle frame in a front-back manner; the terminal plug board is arranged on the 36V lithium battery pack, and the terminal plug board is clamped and locked on the terminal socket in a sliding manner; the motor is mounted at one end of the handle frame; the single-shaft transmission mechanism comprises a transmission cylinder, a transmission shaft and a coupler; the transmission shaft is axially and rotatably inserted into the transmission cylinder; a bevel gear is arranged at the output end of the transmission shaft. According to the utility model, the use of transmission parts can be reduced, the advantages of light structure and compact structure can be achieved, two 36V lithium battery packs can be used for replacing a 72V lithium battery pack, the number of assembled battery modules in the 36V lithium battery packs is smaller, and more cost investment can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting saw transmission, in particular to a lithium battery type double-wheeled different-direction cutting saw. Background Art

[0002] Existing dual-wheeled counter-directional cutting saws use motors as power, and then drive circular saw blades through belt drive components and bevel gear transmission boxes to perform sawing operations. They are safe, reliable, and highly efficient. For example, the lithium-powered dual-wheeled counter-directional cutting saw with publication number CN220659414U has the defects of large space occupied by the transmission structure, lack of compactness, and bulky overall structure, because the cutting saw transmits power between the motor and the cutting saw wheel through belt drive components and bevel gear transmission components. For example, a 72V lithium-powered integrated rail cutting machine with publication number CN214557827U is powered by a large 72V power lithium battery pack. If a battery module in the lithium battery pack is damaged, in order to ensure the reliability and safety of the battery pack when powered, the lithium battery pack needs to be replaced as a whole, resulting in an increase in the cost of use. Utility Model Content

[0003] The purpose of the utility model is to provide a lithium-powered double-wheeled misaligned cutting saw. By designing a novel transmission structure, the use of belt transmission components is reduced, and the advantages of light structure and small occupied volume are achieved. In addition, the transmission shaft is arranged in a vertical relationship with the inner / outer output shaft, so the output torque of the cutting saw is improved. By connecting two 36V lithium battery packs in series to replace a large-volume 72V lithium battery pack, if a battery module is damaged, the 36V lithium battery pack can be directly replaced. Compared with the 72V lithium battery pack, the 36V lithium battery pack has fewer assembled battery modules inside, which can save more cost investment.

[0004] In order to solve the above technical problems, the utility model provides a lithium battery type double wheel different direction cutting saw, comprising:

[0005] Handle rack;

[0006] 36V lithium battery pack, two of the 36V lithium battery packs are connected in series;

[0007] Terminal sockets are arranged on the handle frame in front and back directions respectively;

[0008] A terminal plug board is arranged on the 36V lithium battery pack, and the terminal plug board is slidably locked on the terminal socket;

[0009] A motor is mounted on one end of the handle frame;

[0010] A single-axis transmission mechanism comprises a transmission cylinder, a transmission shaft and a coupling; the transmission shaft is axially rotatable and inserted into the transmission cylinder; a bevel gear is provided at the output end of the transmission shaft, and the bevel gear is meshed with one end of the inner / outer output shaft on the bevel gear double-axis transmission box for transmission, the other end of the inner / outer output shaft is provided with a double-toothed saw, and the transmission shaft is arranged in a vertical relationship with the inner / outer output shaft; the input end of the transmission shaft is connected to the output end of the motor through the coupling.

[0011] Preferably, it also includes a slide rail and a slide groove; the slide rail is symmetrically arranged on the front and rear side walls of the terminal plug board, the slide groove is symmetrically arranged on the front and rear side walls of the terminal socket, and the slide rail and the slide groove are slidably engaged with each other.

[0012] Preferably, it also includes a locking groove and a spring locking block; the locking groove is opened on one of the slide rails, the spring locking block is slidably inserted into the terminal socket, and the locking tongue portion of the spring locking block can be snapped into the locking groove.

[0013] Preferably, the spring locking block comprises: an assembly cavity, a spring, a guide telescopic column and a push lock tongue; the assembly cavity is opened on the terminal socket, the push lock tongue is inserted into the assembly cavity for left and right sliding, the guide telescopic column is arranged between the push lock tongue and the assembly cavity, and the spring is sleeved on the outside of the guide telescopic column, and the two ends of the spring are respectively abutted against the push lock tongue and the assembly cavity.

[0014] Preferably, the bottom of the terminal plug board also includes a plurality of U-shaped grooves opened linearly, and clip terminals are installed in the U-shaped grooves, and the clip terminals are electrically connected to the wiring terminals of the 36V lithium battery pack; the bottom of the inner cavity of the terminal socket also includes a plurality of plug terminals arranged linearly, the upper ends of the plug terminals are clamped and connected to the clamping cavities of the clip terminals, and the plug terminals are electrically connected to the controller installed on the motor.

[0015] Preferably, the transmission cylinder includes: a shaft cylinder and a connecting cylinder; one end of the shaft cylinder is locked with the connecting cylinder by bolts, and one end of the connecting cylinder is inserted into the shaft cylinder, a bearing is embedded in the end of the connecting cylinder close to one side of the shaft cylinder, and another bearing is embedded in the other end of the shaft cylinder, the transmission shaft is rotatably inserted in the two bearings, the other end of the connecting cylinder is locked to the end face housing of the motor by bolts, and the coupling is inserted in the connecting cylinder and coaxially arranged.

[0016] Preferably, the transmission shaft further includes an integrally formed frustum shoulder, and two frustum shoulders are symmetrically sleeved on both ends of the transmission shaft for respectively pressing and abutting against the inner ends of the two bearings.

[0017] Preferably, the connecting cylinder and the shaft cylinder both include integrally formed stop shoulders for pressing and abutting against the outer ends of the two bearings respectively.

[0018] Preferably, it further comprises a lifting frame, a starting switch and a controller, wherein the lifting frame is arranged on the end surface housing of the motor, the controller is arranged on the rear side wall housing of the motor, and the starting switch is arranged on the handle frame.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The utility model transmits power directly to the inner / outer output shaft via the transmission shaft, which can reduce the use of transmission parts and achieve the advantages of light structure and compact structure; on the other hand, the output torque of the cutting saw can be improved by arranging the transmission shaft and the inner / outer output shaft in a vertical relationship.

[0021] 2. The utility model replaces a large 72V lithium battery pack by connecting two 36V lithium battery packs in series. If a battery module is damaged, the 36V lithium battery pack can be directly replaced. Compared with the 72V lithium battery pack, the 36V lithium battery pack has fewer assembled battery modules inside, which can save more cost investment.

[0022] 3. The utility model provides a locking groove and a spring locking block. As the pressing lock tongue is subjected to the downward pressure of the terminal plug board or the manual force, it slides into the assembly cavity for storage. When the locking groove on the terminal plug board moves downward to correspond to the lateral position of the pressing lock tongue, the pressing lock tongue returns to its original position under the elastic force, that is, it is inserted into the locking groove, so as to lock and stop the terminal plug board and the terminal socket, and achieve the reliability of the 36V lithium battery pack after replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of the lithium-powered double-wheeled misaligned-cutting saw provided by the utility model.

[0024] Figure 2 This is a rear view of the lithium-powered double-wheeled misaligned-cutting saw provided by the utility model.

[0025] Figure 3 This is a structural sectional view of the lithium-powered double-wheeled misaligned cutting saw provided by the utility model.

[0026] Figure 4 The structure explosion of the terminal plug board and the terminal socket provided by the utility model Figure 1 .

[0027] Figure 5 The structure explosion of the terminal plug board and the terminal socket provided by the utility model Figure 2.

[0028] Figure 6 This is a structural diagram of the U-shaped slot and the clip terminal provided by the utility model.

[0029] Figure 7 The structure explosion of the terminal socket provided by the utility model Figure 1 .

[0030] Figure 8 The structure explosion of the terminal socket provided by the utility model Figure 2 .

[0031] In the figure: 1-handle frame, 11-start switch, 2-lithium battery pack, 3-terminal socket, 31-slide groove, 32-spring locking block, 321-assembly cavity, 322-spring, 323-guide telescopic column, 324-press lock tongue, 3241-pressing part, 3242-lock tongue part, 33-plug-in terminal, 4-terminal plug board, 41-slide rail, 42-locking groove, 43-U-shaped groove, 44-clip terminal, 5-motor, 6-single-axis transmission mechanism, 61-transmission cylinder, 611-shaft cylinder, 612-connecting cylinder, 613-bearing, 614-stop shoulder, 62-transmission shaft, 621-cone shaft shoulder, 63-coupling, 64-bevel gear, 7-bevel gear double-axis transmission box, 8-double-tooth saw, 9-lifting frame, 10-controller. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the utility model will become clearer. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0033] like Figures 1 to 8 As shown, the embodiment of the utility model provides a lithium-powered dual-wheeled misaligned cutting saw, comprising: a handle frame 1; a 36V lithium battery pack 2, two 36V lithium battery packs 2 are connected in series; they can replace the existing large-volume 72V lithium battery pack 2, saving the cost of replacement. Terminal sockets 3 are arranged on the handle frame 1 in front and back; terminal plug boards 4 are arranged on the 36V lithium battery pack 2, and the terminal plug boards 4 are slidably engaged and locked on the terminal sockets 3; a motor 5 is installed at one end of the handle frame 1;

[0034] The single-axis transmission mechanism 6 includes a transmission cylinder 61, a transmission shaft 62 and a coupling 63; the transmission shaft 62 is inserted into the transmission cylinder 61 in an axially rotatable manner; a bevel gear 64 is provided at the output end of the transmission shaft 62, and the bevel gear 64 is meshed with one end of the inner / outer output shaft on the bevel gear double-axis transmission box 7 for transmission, and a double-toothed saw 8 is provided at the other end of the inner / outer output shaft, and the transmission shaft 62 is arranged in a vertical relationship with the inner / outer output shaft; the input end of the transmission shaft 62 is connected to the output end of the motor 5 through the coupling 63. The structure and transmission relationship of the bevel gear double-axis transmission box 7 and the inner / outer output shaft are exactly the same as those of the prior art disclosed in the lithium-powered double-wheeled misaligned cutting saw with the publication number CN220659414U, so they will not be described in detail.

[0035] It also includes a slide rail 41 and a slide groove 31; the slide rail 41 is symmetrically arranged on the front and rear side walls of the terminal plug board 4, and the slide groove 31 is symmetrically arranged on the front and rear side walls of the terminal socket 3, and the slide rail 41 and the slide groove 31 are slidably connected.

[0036] It also includes a locking groove 42 and a spring locking block 32; the locking groove 42 is opened on one of the slide rails 41, the spring locking block 32 is slidably inserted into the terminal socket 3, and the locking tongue portion 3242 of the spring locking block 32 can be snapped into the locking groove 42; through the above-mentioned spring locking block 32 and the locking groove 42, the 36V lithium battery pack 2 can be quickly disassembled, assembled and replaced.

[0037] The spring locking block 32 includes: an assembly cavity 321, a spring 322, a guide telescopic column 323 and a push lock tongue 324; the terminal socket 3 is provided with an assembly cavity 321, and a push lock tongue 324 is inserted into the assembly cavity 321 for sliding left and right, a guide telescopic column 323 is provided between the push lock tongue 324 and the assembly cavity 321, and the outer sleeve of the guide telescopic column 323 is provided with a spring 322, and the two ends of the spring 322 are respectively abutted against the push lock tongue 324 and the assembly cavity 321.

[0038] The above-mentioned pressing lock tongue 324 also includes a pressing portion 3241 and a lock tongue portion 3242, the pressing portion 3241 is exposed outside the assembly cavity 321 and can move left and right; at the same time, the upper end surface of the lock tongue portion 3242 of the pressing lock tongue 324 and the bottom end surface of the terminal plug board 4 on the side away from the 36V lithium battery pack 2 both adopt matching wedge-shaped surfaces; due to the setting of the wedge-shaped surface, it can be ensured that the terminal plug board 4 can give the pressing lock tongue 324 a pushing force to slide into the assembly cavity 321 when pressed down; and when assembling the terminal plug board 4 and the terminal socket 3, it is also possible to choose to manually apply force to the pressing portion 3241, so as to better provide a sliding force to the pressing lock tongue 324.

[0039] The above-mentioned spring 322 and guide telescopic column 323 provide elastic guiding effect for the pressing lock tongue 324 to slide left and right in the assembly cavity 321. When the terminal plug board 4 is inserted into the slide groove 31 through the slide rail 41, the pressing lock tongue 324 is subjected to the downward pressure of the terminal plug board 4 or manually applied external force and slides and is stored in the assembly cavity 321. When the locking groove 42 on the terminal plug board 4 moves downward to correspond to the lateral position of the pressing lock tongue 324, the pressing lock tongue 324 returns to its original position under the elastic force, that is, it is inserted into the locking groove 42, thereby achieving rapid locking of the terminal plug board 4 and the terminal socket 3.

[0040] The bottom of the terminal plug board 4 also includes a plurality of U-shaped grooves 43 opened linearly, and a clip terminal 44 is installed in the U-shaped groove 43. The clip terminal 44 is made of an Ω-shaped elastic clip material, and the clip terminal 44 is electrically connected to the connection terminal of the 36V lithium battery pack 2; the bottom of the inner cavity of the terminal socket 3 also includes a plurality of plug terminals 33 arranged linearly, and the upper end of the plug terminal 33 is clamped and connected with the clamping cavity of the clip terminal 44, and the plug terminal 33 is electrically connected to the controller 10 installed on the motor 5.

[0041] The transmission cylinder 61 includes: a shaft cylinder 611 and a connecting cylinder 612; one end of the shaft cylinder 611 is locked with the connecting cylinder 612 by bolts, and one end of the connecting cylinder 612 is inserted into the shaft cylinder 611, and a bearing 613 is embedded in the end of the connecting cylinder 612 close to one side of the shaft cylinder 611, and another bearing 613 is embedded in the other end of the shaft cylinder 611. The transmission shaft 62 is rotatably inserted in the two bearings 613, and the other end of the connecting cylinder 612 is locked on the end face housing of the motor 5 by bolts, and the coupling 63 is inserted in the connecting cylinder 612 and is coaxially arranged; the above-mentioned two bearings 613 can improve the stability of the transmission shaft 62 during power transmission.

[0042] The transmission shaft 62 also includes an integrally formed cone shoulder 621, and the two cone shoulders 621 are symmetrically sleeved at both ends of the transmission shaft 62, and are used to press and abut against the inner ends of the two bearings 613. The connecting tube 612 and the shaft tube 611 both include an integrally formed stop shoulder 614, which is used to press and abut against the outer ends of the two bearings 613. Through the mutual cooperation of the two cone shoulders 621 and the two stop shoulders 614, the purpose of stopping and limiting the two bearings 613 during assembly can be achieved, avoiding the axial movement of the transmission shaft 62 during operation, thereby further enhancing the stability of power transmission when the transmission shaft 62 is in operation.

[0043] It also includes a lifting frame 9, a starting switch 11 and a controller 10. The lifting frame 9 is arranged on the end surface housing of the motor 5, the controller 10 is arranged on the rear side wall housing of the motor 5, and the starting switch 11 is arranged on the handle frame 1.

[0044] The above description is only a description of the preferred embodiment of the utility model, and is not any limitation on the scope of the utility model. Any changes and modifications made by ordinary technicians in the field of the utility model based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A lithium battery type double wheel misaligned cutting saw, characterized in that: include: Handle frame (1); 36V lithium battery pack (2), two of the 36V lithium battery packs (2) are connected in series; Terminal sockets (3) are arranged on the handle frame (1) in a front-to-back manner; A terminal plug board (4) is arranged on the 36V lithium battery pack (2), and the terminal plug board (4) is slidably engaged and locked on the terminal socket (3); A motor (5) is mounted on one end of the handle frame (1); A single-axis transmission mechanism (6) comprises a transmission cylinder (61), a transmission shaft (62) and a coupling (63); the transmission shaft (62) is inserted into the transmission cylinder (61) in an axially rotatable manner; a bevel gear (64) is provided at the output end of the transmission shaft (62), and the bevel gear (64) is meshed with one end of an inner / outer output shaft on a bevel gear double-axis transmission box (7) for transmission, the other end of the inner / outer output shaft is provided with a double-toothed saw (8), and the transmission shaft (62) and the inner / outer output shaft are arranged in a vertical relationship; the input end of the transmission shaft (62) is connected to the output end of the motor (5) through the coupling (63).

2. A lithium battery type double wheel misaligned cutting saw as claimed in claim 1, characterized in that: It also includes a slide rail (41) and a slide groove (31); the slide rail (41) is symmetrically arranged on the front and rear side walls of the terminal plug board (4), the slide groove (31) is symmetrically arranged on the front and rear side walls of the terminal socket (3), and the slide rail (41) and the slide groove (31) are slidably engaged with each other.

3. A lithium battery type double wheel misaligned cutting saw as claimed in claim 2, characterized in that: It also includes a locking groove (42) and a spring locking block (32); the locking groove (42) is opened on one of the slide rails (41), the spring locking block (32) is slidably plugged into the terminal socket (3), and the locking tongue portion of the spring locking block (32) can be snapped onto the locking groove (42).

4. A lithium battery type double wheel misaligned cutting saw as claimed in claim 3, characterized in that: The spring locking block (32) comprises: an assembly cavity (321), a spring (322), a guide telescopic column (323) and a pressing lock tongue (324); the terminal socket (3) is provided with the assembly cavity (321), the pressing lock tongue (324) is inserted in the assembly cavity (321) so as to slide left and right, the guide telescopic column (323) is provided between the pressing lock tongue (324) and the assembly cavity (321), and the spring (322) is sleeved on the outside of the guide telescopic column (323), and the two ends of the spring (322) are respectively in contact with the pressing lock tongue (324) and the assembly cavity (321).

5. The lithium battery type double wheel misaligned cutting saw as claimed in claim 1, characterized in that: The bottom of the terminal plug plate (4) also includes a plurality of U-shaped grooves (43) opened linearly, and a clip terminal (44) is installed in the U-shaped groove (43), and the clip terminal (44) is electrically connected to the connection terminal of the 36V lithium battery pack (2); the bottom of the inner cavity of the terminal socket (3) also includes a plurality of plug terminals (33) arranged linearly, and the upper end of the plug terminal (33) is clamped and connected with the clamping cavity of the clip terminal (44), and the plug terminal (33) is electrically connected to the controller (10) installed on the motor (5).

6. The lithium battery type double wheel misaligned cutting saw as claimed in claim 1, characterized in that: The transmission cylinder (61) comprises: a shaft cylinder (611) and a connecting cylinder (612); one end of the shaft cylinder (611) is fastened with the connecting cylinder (612) by bolts, and one end of the connecting cylinder (612) is inserted into the shaft cylinder (611); a bearing (613) is embedded in the end of the connecting cylinder (612) close to one side of the shaft cylinder (611); another bearing (613) is embedded in the other end of the shaft cylinder (611); the transmission shaft (62) is rotatably inserted in the two bearings (613); the other end of the connecting cylinder (612) is fastened to the end face housing of the motor (5) by bolts, and the coupling (63) is inserted into the connecting cylinder (612) and is coaxially arranged.

7. A lithium battery type double wheel misaligned cutting saw as claimed in claim 6, characterized in that: The transmission shaft (62) also includes an integrally formed frustum shoulder (621), and the two frustum shoulders (621) are symmetrically sleeved on the two ends of the transmission shaft (62) and are used to press and abut against the inner ends of the two bearings (613) respectively.

8. A lithium battery type double wheel misaligned cutting saw as claimed in claim 6, characterized in that: The connecting cylinder (612) and the shaft cylinder (611) both include an integrally formed stop shoulder (614) for respectively pressing and abutting against the outer ends of the two bearings (613).

9. A lithium battery powered double wheeled misaligned cutting saw as claimed in any one of claims 1 to 8, characterized in that: It also comprises a lifting frame (9), a starting switch (11) and a controller (10), wherein the lifting frame (9) is arranged on the end surface casing of the motor (5), the controller (10) is arranged on the rear side wall casing of the motor (5), and the starting switch (11) is arranged on the handle frame (1).

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