CN210061627U

CN210061627U - Handheld cutting machine

Info

Publication number: CN210061627U
Application number: CN201920403962.XU
Authority: CN
Inventors: 应崇鹤
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2020-02-14
Anticipated expiration: 2029-03-27

Abstract

The utility model discloses a hand-held cutting machine, which comprises a shell, a handrail, a switch component, a power source and a cutter component connected with the power source through a transmission mechanism; the transmission mechanism comprises a bracket component, a driving wheel connected with a power source, a driven wheel synchronously rotating with the driving wheel through a transmission belt, a main shaft capable of synchronously rotating with the driven wheel, a roller component used for keeping the transmission belt tensioned, and a gear component connected with the main shaft, wherein the gear component is connected with the cutter component; the bracket component is close to the first support that the action wheel set up including being close to, is close to the second support that sets up from the driving wheel, and is used for the third support of jogged joint first support and second support, the third support offsets with the adjusting part on the second support. The utility model discloses simple structure, layout design is reasonable, and is little to the requirement of processing, assembles weak point consuming time, and cutting strength is big, and the cutting is steady, and the efficient of cutting also can easily realize the cutting to the higher material of hardness, can not produce during the cutting and skid.

Description

Handheld cutting machine

Technical Field

The utility model belongs to the cutting implement field of hard materials such as stone material especially relates to a hand-held type cutting machine.

Background

A small-size cutting means who is used for materials such as cutting stone material on the existing market adopts V belt driven cutting device more, and when the too hard material of cutting, when the power of pushing down is big, the V belt takes place to skid easily, and cutting power is little, and cutting effect is not good.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a cutting strength is big, and the cutting is stable, cuts efficiently, the firm hand-held type cutting machine of structure.

The utility model provides a technical scheme that its technical problem adopted is: a handheld cutting machine comprises a shell, a handrail connected with the shell, a switch component, a power source and a cutter component connected with the power source through a transmission mechanism; the transmission mechanism comprises a bracket component, a driving wheel connected with a power source, a driven wheel synchronously rotating with the driving wheel through a transmission belt, a main shaft synchronously rotating with the driven wheel, a roller component used for keeping the transmission belt tensioned, and a gear component connected with the main shaft, wherein the gear component is connected with the cutter component; the bracket component is including being close to the first support that the action wheel set up, the second support that is close to and sets up from the driving wheel, and be used for the third support of jogged joint first support and second support, the third support offsets with the adjusting part on the second support. The utility model changes the traditional transmission mode, the transmission is more stable, the cutting force is large, the cutting is more stable and effective, and the cutting efficiency is high; the first support and the second support are arranged in a split mode, the assembling difficulty is reduced, and the requirement for the machining precision of parts is lowered.

Further, the gear assembly at least comprises a first gear set, a second gear set and a third gear set, wherein the first gear set comprises a first rotating shaft capable of synchronously rotating with the spindle and a first tooth coaxially arranged with the first rotating shaft, the second gear set comprises a second tooth capable of being meshed with the first tooth, and the third gear set comprises a third rotating shaft in fit connection with the cutter assembly and a third tooth meshed with the second tooth. The torque is increased by the cooperation of the first gear set, the second gear set and the third gear set, so that the cutting force is increased, materials with high hardness can be cut under small power, and the adaptability is better.

Furthermore, the gear assembly further comprises a fourth gear set, the third gear set further comprises a third gear arranged in parallel with the third teeth and a third rotating shaft connected with the cutter assembly in a matched mode, the second gear set further comprises a second gear arranged in parallel with the second teeth, the second gear is meshed with the fourth teeth of the fourth gear set, and the fourth teeth are meshed with the third gear.

Further, the cutter assembly comprises a protective cover, a first blade and a second blade, wherein the first blade is partially covered in the protective cover, the second blade is arranged in parallel with the first blade, the first blade is connected with a third rotating shaft, and the second blade is connected with a third rotating shaft. The fourth gear set realizes the synchronous and reverse rotation of the first blade and the second blade, so that the cutting stability is effectively guaranteed, and the material to be cut is prevented from causing great influence on the reaction force of the cutter assembly.

Furthermore, the gear assembly comprises a first gear set, a second gear set and a third gear set, the first gear set comprises a first rotating shaft capable of synchronously rotating with the main shaft and a first tooth coaxially arranged with the first rotating shaft, the second gear set comprises a second tooth capable of being meshed with the first tooth and a second rotating shaft, and the third gear set comprises a third rotating shaft connected with the cutter assembly in a matched mode and a third gear meshed with the second tooth.

Further, the roller assembly comprises a roller with an outer wall attached to the transmission belt, and an elastic component with one end connected with the second support and the other end connected with the roller, wherein the elastic component is in a stretching state. The roller component realizes the regulation-free function of the transmission belt, and the elastic component is always in a stretching state, namely, the elastic component applies an acting force to the roller to press the transmission belt, so that the transmission belt is always in a tensioning state, and the transmission effectiveness of the driving wheel and the driven wheel is ensured.

Furthermore, the lateral wall of drive belt is smooth structure, and its inside wall has evenly laid the dogtooth along circumference, the action wheel forms the draw-in groove with this dogtooth adaptation on the driving wheel and the follow driving wheel outer wall. The design of the convex teeth ensures that the driving belt cannot slip, and the transmission is more stable and effective.

Furthermore, the adjusting component comprises a connecting plate fixedly connected to the second support and a threaded rod penetrating through the connecting plate, and the end face of the threaded rod is abutted to the end face of the third support. During the assembly, adjusting threaded rod can support the third support to one side at first support place and press, has also played the tensioning to the drive belt, the degree of difficulty during the reduction assembly.

Furthermore, a plurality of first kidney-shaped holes are formed in the area, opposite to the first support, of the third support, and a plurality of second kidney-shaped holes are also formed in the area, opposite to the second support, of the third support. The design of waist type hole is convenient the adjustment during the assembly, even there is certain processing clearance between the spare part, also can quick adjustment.

Further, the gear assembly is arranged in the gear box, a cavity matched with the gear assembly is formed in the gear box, a plurality of reinforcing ribs are arranged between the side wall of the gear box and the outer wall of the cavity, and a plurality of mounting columns are arranged on the edge of the gear box along the circumferential direction. Whole spatial layout is reasonable, and the gear assembly can not receive the too much interference of other spare parts, and the transmission is more high-efficient, and overall structure is compact, and the fastness is high, long service life.

The utility model has the advantages that: simple structure, layout design is reasonable, and is little to the requirement of processing, assembles weak point consuming time, and cutting strength is big, and the cutting is steady, and the efficient of cutting also can easily realize the cutting to the higher material of hardness, can not produce during the cutting and skid.

Drawings

Fig. 1 is a schematic perspective view (not completely assembled) of a first embodiment of the present invention.

Fig. 2 is a schematic view of a partial structure of a transmission mechanism according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a third bracket according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a gear assembly according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a gear assembly according to an embodiment of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

Example one

As shown in fig. 1-4, a hand-held cutting machine comprises a housing 1, a handle 11, a switch assembly 12, a power source, a transmission mechanism and a cutter assembly 2, wherein the handle 11 is U-shaped, two open ends of the handle are respectively fixedly connected with two sides of the housing 1, the switch assembly 12 is arranged at one end of the housing 1, the cutter assembly 2 is arranged at the other end of the housing 1, a side surface of the housing 1 opposite to the handle 11 is connected with a wheel 13, and the wheel 13 is arranged close to the cutter assembly 2.

The transmission mechanism is arranged along the length direction of the shell 1 and comprises a bracket component, a driving wheel 4 connected with a power source, a transmission belt 5, a driven wheel 6, a main shaft 61 which is positioned in the center of the driven wheel 6 and can synchronously rotate with the driven wheel, a roller component used for keeping the transmission belt 5 in a tensioning state, and a gear component connected with the main shaft 61.

The bracket components comprise a first bracket 71 arranged close to the driving wheel 4, a second bracket 72 arranged close to the driven wheel 6, a third bracket 73 connected with the first bracket 71 and the second bracket 72 respectively, and a fourth bracket 74, wherein the third bracket 73 is used for splicing and connecting the first bracket 71 and the second bracket 72 which are separated, in order to facilitate the assembly in the tensioned state of the drive belt 5, an adjustment assembly is provided on the second bracket 72, it comprises a connecting plate 91 fixedly connected with the inner surface of the second bracket 72 and a threaded rod 92 penetrating through the connecting plate 91, the connecting plate 91 is vertical to the second bracket 72, the threaded rod 92 is parallel to the second bracket 72 and is vertical to the connecting plate 91, when assembling, the right end face of the third support 73 is abutted against the left end face of the threaded rod 92, and then external force is applied to rotate the threaded rod 92, so that the third support 73 is resisted in the direction away from the second support 72, and the effectiveness of the overall assembly is guaranteed.

In order to facilitate fine adjustment at any time during assembly, a plurality of first waist-shaped holes 731 are formed in the area, opposite to the first support 71, of the third support 73, so that screws can penetrate through the waist-shaped holes to fix the third support after position correspondence is completed, requirements for machining accuracy of parts are lowered, production cost is saved, disassembly and assembly are facilitated, a plurality of second waist-shaped holes 732 are also formed in the area, opposite to the second support 72, of the third support 73, and screws can penetrate through the waist-shaped holes to fix the third support after position correspondence is completed.

The lateral wall of drive belt 5 is smooth structure, and a plurality of dogtooths 51 have evenly been laid along circumference to its inner wall, and dogtooths 51 extend along the direction of height of drive belt 5, and lay whole length direction, on the outer wall of action wheel 4, set up the draw-in groove 62 with dogtooth 51's shape, size adaptation from the outer wall of driving wheel 6 to during the transmission, dogtooth 51 can block in draw-in groove 62, can not take place to skid.

In order to ensure that the driving belt 5 is always in a tensioned state after being used for a long time, a roller assembly is disposed on the second support 72, and includes a roller 31 whose outer wall is attached to the outer side wall of the driving belt 5, when the driving belt 5 is continuously moving, the roller 31 rotates along with the outer side wall, a central axis (not shown in the figure) of the roller 31 is fixedly connected to one end of the elastic member 32, in this embodiment, the elastic member 32 is a spring, and the other end of the elastic member 32 is fixedly connected to the connecting block 721 on the second support 72, so that one end of the elastic member 32 is fixed, and the other end is in a movable state after being stretched, when the driving belt 5 has a slight gap, the elastic member 32 can pull the roller 31 toward the connecting block 721, so as to increase the attachment area between the driving belt 5 and the driven wheel 6, that the elastic member 32.

The gear assembly includes a first gear set 81, a second gear set 82, a third gear set 83 and a fourth gear set 84, the first gear set 81 includes a first rotation shaft 811 which can be connected to the main shaft 61 and can rotate synchronously therewith, and a first tooth 812 which is coaxially disposed with the first rotation shaft 811; the second gear set 82 comprises a second tooth 821 which can be in meshing transmission with the first tooth 812, a second gear 822 which is coaxially and parallelly arranged below the second tooth 821, and a second rotating shaft 823; the third gear set 83 includes a third rotating shaft 831 cooperatively connected with the cutter assembly 2, a third tooth 832 capable of meshing with the second tooth 821, a third gear 833 disposed in parallel below the third tooth 832, and a third rotating shaft (not shown in the figure) cooperatively connected with the cutter assembly 2, wherein the third rotating shaft 831 is cooperatively connected to the center of the third tooth 832, the third tooth 832 is in meshing with the second tooth 821, the third rotating shaft 833 is cooperatively connected to the center of the third gear 833, and the third rotating shaft 833 is in meshing transmission with the second gear 822, i.e., the third rotating shaft 831 and the rotating shaft move independently; the fourth gear set 84 includes a fourth rotational shaft and fourth teeth 841, the fourth teeth 841 being in meshing engagement with gear two 822 and gear three 833, respectively.

The gear assembly is arranged in the gear box 85, a cavity 851 matched with the first gear set 81, the second gear set 82, the third gear set 83 and the fourth gear set 84 is designed on the gear box 85, the shape of the cavity 851 is matched with the shape of the cavity 851 after being integrally assembled, a plurality of strip-shaped reinforcing ribs 852 are further connected between the inner side wall of the gear box 85 and the outer wall of the cavity 851, so that the integral firmness of the gear box 85 is increased, a plurality of mounting columns 853 are arranged on the edge of the gear box 85 in a circle, and the gear box 85 is fixedly mounted by screws connected with the mounting columns.

The cutter assembly 2 includes a protective cover 21, a first blade 22 partially covered in the protective cover 21, and a second blade (covered by the first blade 22 in the figure) parallel to and facing the first blade 22. The first blade 22 is connected to the third rotating shaft 831, and the second blade is connected to the third rotating shaft 831, so that when the power source drives the first rotating shaft 811 to rotate synchronously through the main shaft 61, the first tooth 812 also rotates synchronously, for example, clockwise, and drives the second tooth 821 engaged therewith to rotate counterclockwise, and further drives the third tooth 832 with a larger outer diameter to rotate clockwise, and the first blade 22 connected to the third rotating shaft 831 rotates clockwise synchronously; at this time, the second tooth 821 drives the second rotating shaft 823 to rotate, the second gear 822 located below the second tooth 821 synchronously rotates counterclockwise, and further drives the fourth tooth 841 meshed with the second tooth 841 to rotate clockwise, so as to drive the third gear 833 meshed with the third gear 833 with a larger outer diameter to rotate counterclockwise, and the second blade connected with the third rotating shaft synchronously rotates counterclockwise; therefore, the synchronous and reverse rotation of the first blade 22 and the second blade is realized, and the cutting stability is ensured.

Example two

The structure of the hand-held cutting machine in this embodiment is the same as that in the first embodiment, except that the structure of the gear assembly, as shown in fig. 5, the gear assembly in this embodiment includes a first gear set 81, a second gear set 82 and a third gear set 83, the first gear set 81 includes a first rotating shaft 811 which can be connected to the main shaft 61 and can rotate synchronously therewith, and a first tooth 812 which is coaxially disposed with the first rotating shaft 811; the second gear set 82 includes a second tooth 821 which can be driven in mesh with the first tooth 812, and a second rotation shaft 823 which is disposed concentrically with the second tooth 821; the third gear set 83 includes a third rotating shaft 834 capable of being cooperatively connected with the cutter assembly 2, and a third gear 833 capable of being in mesh transmission with the second gear 821, wherein the third rotating shaft 834 is cooperatively connected to the center of the third gear 833.

The cutter assembly 2 includes a protective cover 21, and a first blade 22 partially covered in the protective cover 21, the first blade 22 is connected to a third rotating shaft 834, when a power source drives the first rotating shaft 811 to rotate synchronously through the main shaft 61, the first tooth 812 also rotates synchronously, for example, clockwise, to drive the second tooth 821 engaged therewith to rotate counterclockwise, and further to drive the third gear 833 with a larger outer diameter to rotate clockwise, and the first blade 22 connected to the third rotating shaft 834 rotates clockwise synchronously, which is different from the first embodiment in that only one blade is provided.

The above detailed description is provided for illustrative purposes, and is not intended to limit the present invention, and any modifications and variations of the present invention are within the spirit and scope of the following claims.

Claims

1. A hand-held type cutting machine which characterized in that: comprises a shell (1), a handrail (11) connected with the shell (1), a switch component (12), a power source and a cutter component (2) connected with the power source through a transmission mechanism; the transmission mechanism comprises a bracket assembly, a driving wheel (4) connected with a power source, a driven wheel (6) synchronously rotating with the driving wheel (4) through a transmission belt (5), a main shaft (61) capable of synchronously rotating with the driven wheel (6), a roller assembly used for keeping the transmission belt (5) tensioned, and a gear assembly connected with the main shaft (61), wherein the gear assembly is connected with the cutter assembly; the bracket component comprises a first bracket (71) close to the driving wheel (4), a second bracket (72) close to the driven wheel (6), and a third bracket (73) used for splicing and connecting the first bracket (71) and the second bracket (72), wherein the third bracket (73) is abutted to an adjusting component on the second bracket (72).

2. The hand-held cutter of claim 1, wherein: the gear assembly at least comprises a first gear set (81), a second gear set (82) and a third gear set (83), wherein the first gear set (81) comprises a first rotating shaft (811) capable of synchronously rotating with the spindle (61) and a first tooth (812) coaxially arranged with the first rotating shaft (811), the second gear set (82) comprises a second tooth (821) capable of being meshed with the first tooth (812), and the third gear set (83) comprises a third rotating shaft (831) in fit connection with the cutter assembly (2) and a third tooth (832) meshed with the second tooth (821).

3. The hand-held cutting machine of claim 2 wherein: the gear assembly further comprises a fourth gear set (84), the third gear set (83) further comprises a third gear (833) arranged in parallel with the third tooth (832) and a third rotating shaft in matched connection with the cutter assembly (2), the second gear set (82) further comprises a second gear (822) arranged in parallel with the second tooth (821), the second gear (822) is meshed with a fourth tooth (841) of the fourth gear set (84), and the fourth tooth (841) is meshed with the third gear (833).

4. The hand-held cutting machine of claim 3 wherein: cutter unit spare (2) include safety cover (21), and first blade (22) that the part cover was located safety cover (21) reach the second blade with first blade (22) parallel arrangement, first blade (22) link to each other with third rotation axis (831), the second blade links to each other with rotation axis three.

5. The hand-held cutter of claim 1, wherein: the gear assembly comprises a first gear set (81), a second gear set (82) and a third gear set (83), wherein the first gear set (81) comprises a first rotating shaft (811) capable of synchronously rotating with the spindle (61) and a first tooth (812) coaxially arranged with the first rotating shaft (811), the second gear set (82) comprises a second tooth (821) capable of meshing with the first tooth (812) and a second rotating shaft (823), and the third gear set (83) comprises a rotating shaft third (834) in fit connection with the cutter assembly (2) and a gear third (833) meshed with the second tooth (821).

6. The hand-held cutter of claim 1, wherein: the roller assembly comprises a roller (31) with an outer wall attached to the transmission belt (5), and an elastic component (32) with one end connected with the second support (72) and the other end connected with the roller (31), wherein the elastic component (32) is in a stretching state.

7. The hand-held cutter of claim 1, wherein: the outer side wall of the transmission belt (5) is of a smooth structure, convex teeth (51) are uniformly distributed on the inner side wall of the transmission belt along the circumferential direction, and clamping grooves (62) matched with the convex teeth (51) are formed on the outer walls of the driving wheel (4) and the driven wheel (6).

8. The hand-held cutter of claim 1, wherein: the adjusting assembly comprises a connecting plate (91) fixedly connected to the second support (72) and a threaded rod (92) penetrating through the connecting plate (91), and the end face of the threaded rod (92) is abutted to the end face of the third support (73).

9. The hand-held cutter of claim 1, wherein: the area of the third support (73) opposite to the first support (71) is provided with a plurality of first kidney-shaped holes (731), and the area of the third support (73) opposite to the second support (72) is also provided with a plurality of second kidney-shaped holes (732).

10. The hand-held cutter of claim 1, wherein: the gear assembly is arranged in the gear box (85), a cavity (851) matched with the gear assembly is arranged on the gear box (85), a plurality of reinforcing ribs (852) are arranged between the side wall of the gear box (85) and the outer wall of the cavity (851), and a plurality of mounting columns (853) are arranged on the edge of the gear box (85) along the circumferential direction.