Lithium battery type toothless saw

Abstract

The utility model relates to the technical field of cutting machines, in particular to a lithium battery type toothless saw. Comprising a handle frame and a toothless saw, the toothless saw is mounted on the handle frame; the system also comprises 36V lithium battery packs, and the two 36V lithium battery packs are connected in series. The insertion needle plate is arranged on the 36V lithium battery pack; guide rails are symmetrically arranged on the front side wall and the rear side wall of the insertion needle plate. The lock groove is formed in one of the guide rails; the inserting needle seats are arranged on the front side and the rear side of one end of the handle frame; guide grooves are symmetrically formed in the front inner side wall and the rear inner side wall of the inserting needle base, and the guide rails and the guide grooves are connected in a sliding and clamping mode. And the spring locking block and the left and right dampers are inserted into the inserting needle seat in a sliding manner, and the spring locking block and the locking groove are clamped in a sliding manner. Compared with a 72V lithium battery pack, the 36V lithium battery pack provided by the utility model has the advantages that the number of assembled battery modules in the 36V lithium battery pack is smaller, and more cost investment can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting machines, in particular to a lithium battery type toothless saw. Background Art

[0002] At present, the cutting machine products involved in the domestic market have a 72V lithium battery pack assembled on the cutting machine to achieve an integrated design structure. However, the above lithium battery pack is a 72V power supply. If a battery module in the lithium battery pack is damaged, in order to ensure the reliability and safety of the battery pack when supplying power, 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 battery type toothless saw, which replaces a large volume 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.

[0004] In order to solve the above technical problems, the utility model provides a lithium battery type toothless saw, comprising: a handle frame and a toothless saw; the toothless saw is installed on the handle frame; and further comprising:

[0005] 36V lithium battery pack, two of the 36V lithium battery packs are connected in series;

[0006] A plug-in pin plate is arranged on the 36V lithium battery pack; guide rails are symmetrically arranged on the front and rear side walls of the plug-in pin plate;

[0007] A locking groove is provided on one of the guide rails;

[0008] The plug-in needle seat is arranged on the front and rear sides of one end of the handle frame; the front and rear inner side walls of the plug-in needle seat are symmetrically provided with guide grooves, and the guide rails are slidably engaged with the guide grooves;

[0009] The spring locking block is inserted on the plugging needle seat in a left-right damping sliding manner, and the spring locking block is slidably engaged with the locking groove.

[0010] Preferably, the bottom of the plug pin plate 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 connection terminals of the 36V lithium battery pack.

[0011] Preferably, the clip terminal is made of elastic metal sheet.

[0012] Preferably, the spring lock block comprises: an assembly cavity, a spring, a guide telescopic column and a push lock tongue; the assembly cavity is opened on the plug-in needle seat, the push lock tongue is slidably inserted in the assembly cavity left and right, 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.

[0013] Preferably, the upper end surface of the lock tongue portion of the pressing lock tongue and the bottom end surface of the plug pin plate on the side away from the 36V lithium battery pack both adopt matching wedge-shaped surfaces.

[0014] Preferably, the bottom of the inner cavity of the plug socket further includes a plurality of plug terminals arranged linearly, the upper ends of the plug terminals are clamped and connected with the clamping cavities of the clip terminals; and the plug terminals are electrically connected with the controller.

[0015] Preferably, the toothless saw comprises: a motor, a belt transmission mechanism, a locking piece, a circular saw blade and a protective cover; the output end of the motor is connected to the input end of the belt transmission mechanism, the output end of the belt transmission mechanism is locked with the circular saw blade through the locking piece, and the outside of the circular saw blade also includes the protective cover.

[0016] Preferably, the locking member includes: a conical positioning disk, a clamping gasket and a locking screw; the two conical positioning disks are symmetrically abutted against the top and bottom sides of the circular saw blade respectively, and the two conical positioning disks and the circular saw blade are both sleeved on the output end of the belt transmission mechanism, and the clamping gasket is locked and abutted against the top of the upper conical positioning disk by the locking screw, and at the same time, the threaded end of the locking screw is locked and inserted into the locking hole of the output end of the belt transmission mechanism.

[0017] Preferably, the axial hole of the conical positioning disk is composed of an arc groove and a straight groove; the two arc grooves and the two straight grooves are cross-circumferentially distributed transitionally connected to achieve the ability to stop the output end of the belt transmission mechanism during assembly.

[0018] Preferably, it further comprises a lifting frame, wherein the lifting frame is arranged on the motor housing of the toothless saw.

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

[0020] 1. 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.

[0021] 2. By adding the above-mentioned two conical positioning disks, the utility model has a structural setting. Compared with the traditional locking structure that directly cooperates with the locking screw and the gasket, the diameter of the annular surface where the conical positioning disk and the circular saw blade are clamped and abutted is larger than the diameter of the annular surface where the traditional gasket is pressed and abutted, so the locking effect is better and the phenomenon of locking force concentration on the circular saw blade is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The present invention is a three-dimensional diagram of a lithium battery toothless saw provided by the present invention.

[0023] Figure 2 This is an exploded view of the structure of the 36V lithium battery pack provided by the utility model.

[0024] Figure 3 This is a structural diagram of the plug-in pin plate provided by the utility model.

[0025] Figure 4 This is a structural diagram of the plug-in needle holder provided by the utility model.

[0026] Figure 5 This is a structural explosion diagram of the spring lock block provided by the utility model.

[0027] Figure 6 This is an enlarged view of the local structure of a lithium battery type toothless saw provided by the utility model.

[0028] Figure 7 This is a structural diagram of the conical positioning disk provided by the utility model.

[0029] In the figure: 1-handle frame, 2-toothless saw, 21-motor, 22-belt drive mechanism, 23-locking piece, 231-conical positioning plate, 232-pressing gasket, 233-locking screw, 234-locking hole, 235-axis hole, 24-circular saw blade, 25-protective cover, 3-36V lithium battery pack, 4-plug-in needle plate, 41-guide rail, 42-U-shaped groove, 43-clip terminal, 5-locking groove, 6-plug-in needle seat, 61-guide groove, 62-plug terminal, 7-spring lock block, 71-assembly cavity, 72-spring, 73-guide telescopic column, 74-press lock tongue, 8-controller, 9-lifting frame. DETAILED DESCRIPTION

[0030] 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.

[0031] like Figures 1 to 7As shown, the embodiment of the utility model provides a lithium battery type toothless saw, including: a handle frame 1 and a toothless saw 2; the toothless saw 2 is installed on the handle frame 1, and the handle frame 1 also includes a start switch electrically connected to the controller 8; it also includes: a 36V lithium battery pack 3, two 36V lithium battery packs 3 are connected in series, which can replace the existing large-volume 72V lithium battery pack, saving the cost of replacement; a plug-in needle plate 4, arranged on the 36V lithium battery pack 3; guide rails 41 are symmetrically arranged on the front and rear side walls of the plug-in needle plate 4; a locking groove 5 is opened on one of the guide rails 41; a plug-in needle seat 6 is arranged on the front and rear sides of one end of the handle frame 1; guide grooves 61 are symmetrically opened on the front and rear inner side walls of the plug-in needle seat 6, and the guide rails 41 and the guide grooves 61 are slidably engaged; a spring lock block 7 is slidably inserted into the plug-in needle seat 6 with left and right damping, and the spring lock block 7 and the lock groove 5 are slidably engaged. The spring lock block 7 and the lock slot 5 can realize quick disassembly, assembly and replacement of the 36V lithium battery pack 3.

[0032] The bottom of the plug pin plate 4 also includes a plurality of U-shaped grooves 42 which are opened linearly. Clip terminals 43 are installed in the U-shaped grooves 42 . The clip terminals 43 are electrically connected to the connection terminals of the 36V lithium battery pack 3 .

[0033] In order to ensure the reliability of the connection between the clip terminal 43 and the plug terminal 62, the clip terminal 43 is made of elastic metal sheet to provide better clamping force, and this clip terminal 43 is an Ω-type structure.

[0034] like Figure 5 As shown, the spring lock block 7 includes: an assembly cavity 71, a spring 72, a guide telescopic column 73 and a pressing lock tongue 74; the plug-in needle seat 6 is provided with an assembly cavity 71, and a pressing lock tongue 74 is inserted in the assembly cavity 71 for sliding left and right, and a guide telescopic column 73 is provided between the pressing lock tongue 74 and the assembly cavity 71, and the outer sleeve of the guide telescopic column 73 is provided with a spring 72, and the two ends of the spring 72 are respectively abutted against the pressing lock tongue 74 and the assembly cavity 71. The above-mentioned spring 72 and guide telescopic column 73 provide elastic guiding effect for the pressing lock tongue 74 to slide left and right in the assembly cavity 71. When the plug-in needle plate 4 is inserted into the guide groove 61 through the guide rail 41, the pressing lock tongue 74 is subjected to the downward pressure of the plug-in needle plate 4 and slides and is accommodated in the assembly cavity 71. When the lock groove 5 on the plug-in needle plate 4 moves downward to correspond to the lateral position of the pressing lock tongue 74, the pressing lock tongue 74 returns to its original position under the elastic force, that is, it is inserted into the lock groove 5, thereby achieving rapid locking of the plug-in needle plate 4 and the plug-in needle seat 6.

[0035] The above-mentioned pressing lock tongue 74 also includes a pressing part and a lock tongue part, the pressing part is exposed outside the assembly cavity 71 and can move left and right; at the same time, the upper end surface of the lock tongue part of the pressing lock tongue 74 and the bottom end surface of the plug-in pin plate 4 on the side away from the 36V lithium battery pack 3 both adopt matching wedge-shaped surfaces; due to the setting of the wedge-shaped surface, it can be ensured that the plug-in pin plate 4 can give the pressing lock tongue 74 a pushing force to slide into the assembly cavity 71 when pressed down; and when assembling the plug-in pin plate 4 and the plug-in pin seat 6, it is also possible to choose to manually apply force to the pressing part, so as to better provide a sliding force to the pressing lock tongue 74.

[0036] The bottom of the inner cavity of the plug-in needle seat 6 also includes a plurality of linearly arranged plug-in terminals 62, the upper end of the plug-in terminal 62 is inserted into the clamping cavity of the clip terminal 43, that is, from the bottom open end of the Ω-type clip terminal 43 for clamping connection; the plug-in terminal 62 is electrically connected to the controller 8, and the controller 8 is electrically connected to the motor 21.

[0037] The toothless saw 2 includes: a motor 21, a belt transmission mechanism 22, a locking member 23, a circular saw blade 24 and a protective cover 25; the output end of the motor 21 is connected to the input end of the belt transmission mechanism 22, the output end of the belt transmission mechanism 22 is locked with the circular saw blade 24 through the locking member 23, and the outer part of the circular saw blade 24 also includes a protective cover 25. The belt transmission mechanism 22 includes a connecting beam, a driving pulley, a driven pulley and a transmission belt; one end of the connecting beam is connected to the housing of the motor 21 and is equipped with a driving pulley, and the other end is used to assemble the driven pulley, a transmission belt is wound between the driving pulley and the driven pulley, and the circular saw blade 24 is assembled on the output shaft end of the driven pulley.

[0038] like Figure 6 As shown, the locking member 23 includes: a conical positioning disk 231, a clamping gasket 232 and a locking screw 233; the two conical positioning disks 231 are symmetrically abutted against the top and bottom sides of the circular saw blade 24, and the two conical positioning disks 231 and the circular saw blade 24 are both sleeved on the output end of the belt transmission mechanism 22, and the clamping gasket 232 is locked and abutted against the top of the upper conical positioning disk 231 through the locking screw 233, and at the same time, the threaded end of the locking screw 233 is locked and inserted into the locking hole 234 at the output end of the belt transmission mechanism 22. By adding the above-mentioned two conical positioning plates 231, compared with the traditional locking structure that directly cooperates with the gasket through the locking screw 233, the diameter of the annular surface where the conical positioning plate 231 is clamped and abutted against the circular saw blade 24 is larger than the diameter of the annular surface where the traditional gasket is pressed and abutted, and the locking effect is better. At the same time, the phenomenon of locking force concentration on the circular saw blade 24 is also reduced.

[0039] like Figure 7As shown, the axial hole 235 of the conical positioning disk 231 is composed of an arc groove and a straight groove; the two arc grooves and the two straight grooves are cross-circularly distributed transition connections to achieve the output end of the belt transmission mechanism 22 being able to be stopped during assembly, and the output shaft end structure of the driven pulley is designed to match the axial hole 235 of the conical positioning disk 231; the above-mentioned stopping structure, i.e. the straight groove, can prevent the conical positioning disk 231 from rotating relative to the output shaft end of the driven pulley, further improving the reliability of the circular saw blade 24 during locking and assembly.

[0040] The utility model also comprises a lifting frame 9 which is arranged on the housing of the motor 21 of the toothless saw 2, so that an operator can hold the lifting frame 9 with one hand and hold the handle frame 1 with the other hand for cutting.

[0041] 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 toothless saw, comprising: A handle frame (1) and a toothless saw (2); The toothless saw (2) is mounted on the handle frame (1); the handle frame (1) is characterized in that it further comprises: 36V lithium battery pack (3), two of the 36V lithium battery packs (3) are connected in series; A plug-in pin plate (4) is arranged on the 36V lithium battery pack (3); guide rails (41) are symmetrically arranged on the front and rear side walls of the plug-in pin plate (4); A locking groove (5) is provided on one of the guide rails (41); The plug-in needle seat (6) is arranged on the front and rear sides of one end of the handle frame (1); the front and rear inner side walls of the plug-in needle seat (6) are symmetrically provided with guide grooves (61), and the guide rail (41) is slidably engaged with the guide groove (61); The spring lock block (7) is inserted into the plug-in needle seat (6) in a left-right damping sliding manner, and the spring lock block (7) is slidably engaged with the lock groove (5).

2. A lithium battery type toothless saw as claimed in claim 1, characterized in that: The bottom of the plug pin plate (4) further comprises a plurality of U-shaped grooves (42) which are opened linearly, and a clip terminal (43) is installed in the U-shaped groove (42), and the clip terminal (43) is electrically connected to the connection terminal of the 36V lithium battery pack (3).

3. A lithium battery type toothless saw as claimed in claim 2, characterized in that: The clip terminal (43) is made of elastic metal sheet.

4. A lithium battery type toothless saw as claimed in claim 1, characterized in that: The spring lock block (7) comprises: an assembly cavity (71), a spring (72), a guide telescopic column (73) and a pressing lock tongue (74); the assembly cavity (71) is provided on the plug-in needle seat (6), the pressing lock tongue (74) is inserted in the assembly cavity (71) so as to slide left and right, the guide telescopic column (73) is provided between the pressing lock tongue (74) and the assembly cavity (71), and the spring (72) is sleeved on the outside of the guide telescopic column (73), and the two ends of the spring (72) are respectively in contact with the pressing lock tongue (74) and the assembly cavity (71).

5. A lithium battery type toothless saw as claimed in claim 4, characterized in that: The upper end surface of the locking tongue portion of the pressing locking tongue (74) and the bottom end surface of the plugging needle plate (4) on the side away from the 36V lithium battery pack (3) both adopt matching wedge-shaped surfaces.

6. A lithium battery type toothless saw as claimed in claim 2, characterized in that: The bottom of the inner cavity of the plug-in needle seat (6) also includes a plurality of plug-in terminals (62) arranged linearly, and the upper ends of the plug-in terminals (62) are clamped and connected to the clamping cavities of the clip terminals (43); the plug-in terminals (62) are electrically connected to the controller (8).

7. A lithium battery type toothless saw as claimed in claim 6, characterized in that: The toothless saw (2) comprises: a motor (21), a belt transmission mechanism (22), a locking member (23), a circular saw blade (24) and a protective cover (25); the output end of the motor (21) is connected to the input end of the belt transmission mechanism (22), the output end of the belt transmission mechanism (22) is locked with the circular saw blade (24) through the locking member (23), and the protective cover (25) is also provided on the outside of the circular saw blade (24).

8. A lithium battery type toothless saw as claimed in claim 7, characterized in that: The locking member (23) comprises: a conical positioning disk (231), a pressing gasket (232) and a locking screw (233); the two conical positioning disks (231) are symmetrically abutted against the top and bottom sides of the circular saw blade (24), and the two conical positioning disks (231) and the circular saw blade (24) are both sleeved on the output end of the belt transmission mechanism (22); the pressing gasket (232) is locked and abutted against the top of the upper conical positioning disk (231) by the locking screw (233), and at the same time, the threaded end of the locking screw (233) is locked and inserted into the locking hole (234) at the output end of the belt transmission mechanism (22).

9. A lithium battery type toothless saw as claimed in claim 8, characterized in that: The axial hole (235) of the conical positioning disk (231) is composed of an arc groove and a straight groove; the two arc grooves and the two straight grooves are cross-circumferentially distributed transitionally connected to achieve the output end of the belt transmission mechanism (22) being able to stop during assembly.

10. A lithium battery type toothless saw as claimed in any one of claims 1 to 9, characterized in that: It also comprises a lifting frame (9), wherein the lifting frame (9) is arranged on the outer shell of the motor (21) of the toothless saw (2).

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