Double-end hedge shear gearbox

Abstract

The utility model discloses a double-headed hedge shear gearbox, and belongs to the technical field of landscaping tools. The device mainly comprises a shell, a transmission shaft, a cam and a connecting rod, the shell is formed by buckling an upper shell and a lower shell, and a rotating space is defined between the upper shell and the lower shell; the transmission shaft is embedded in the rotating space in a rotating mode, and the two ends of the transmission shaft protrude out of the upper shell and the lower shell respectively. The cam is arranged in the middle of the transmission shaft in a sleeving mode and meshed with the transmission shaft, and an eccentric structure is arranged on the side wall of the cam. And the connecting rod is movably connected with the eccentric structure. The internal structure is optimized, so that the failure rate is reduced, the working stability is improved, and meanwhile, the production cost is also reduced. The garden green plant pruning machine is mainly used for pruning garden green plants.

Description

Technical Field

[0001] The utility model belongs to the technical field of gardening tools, and in particular relates to a double-head hedge shears gear box. Background Art

[0002] In the daily maintenance of landscaping, different tools are needed to perform management or ornamental pruning of green plants, among which reciprocating hedge trimming equipment is often used. However, the existing reciprocating hedge trimming equipment has a complex internal reciprocating structure and a high failure rate. Usually, the purpose of reducing the failure rate is achieved by improving the processing accuracy of components such as gears, but this will have a greater impact on production costs. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art and provide a double-head hedge shear gear box, which reduces the failure rate and improves its working stability by optimizing the internal structure, while also reducing its production cost.

[0004] The double-headed hedge shears gear box comprises a shell, a transmission shaft, a cam and a connecting rod. The shell is composed of an upper shell and a lower shell that are buckled together, and a rotation space is defined between the two; the transmission shaft is rotatably embedded in the rotation space, and its two ends protrude outside the upper shell and the lower shell respectively; the cam is sleeved in the middle of the transmission shaft and meshed with the transmission shaft, and an eccentric structure is provided on the side wall of the cam; the connecting rod is movably connected to the eccentric structure.

[0005] Preferably, the transmission shaft comprises a sleeve and a spline shaft, wherein the spline shaft is meshingly connected with the cam.

[0006] Preferably, a first locating bearing and a second locating bearing are installed on the outer side wall of the spline shaft, wherein the first locating bearing is located at the connection between the shaft sleeve and the spline shaft.

[0007] Preferably, the eccentric structure includes a first eccentric disk, a second eccentric disk, and a rotary bearing. The first eccentric disk is located on one side of the cam, the second eccentric disk is located on the other side of the cam, and rotary bearings are installed on the outer side walls of the first eccentric wheel and the second eccentric wheel.

[0008] Preferably, the first eccentric disk and the second eccentric disk are arranged in a staggered manner.

[0009] Preferably, an engagement groove communicating with the second eccentric disk is provided at a position adjacent to the center of the first eccentric disk, and the engagement groove is adapted to the spline shaft.

[0010] Preferably, the engagement groove and the center of the cam are on the same straight line.

[0011] Preferably, the connecting rod comprises an upper connecting rod and a lower connecting rod, wherein the upper connecting rod is connected to the first eccentric disk, the lower connecting rod is connected to the second eccentric disk, and the upper connecting rod and the lower connecting rod overlap each other.

[0012] Preferably, it further comprises a plurality of blades which are movably connected to the upper connecting rod and the lower connecting rod respectively, and the blades in the same direction are in contact with each other.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The internal structure has been optimized to reduce its failure rate, improve working stability and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the transmission shaft structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the assembly of the transmission shaft and the cam of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the cam and eccentric structure of the utility model;

[0019] Figure 5 It is a schematic diagram of the connection mode between the connecting rod and the cam of the utility model;

[0020] Figure 6 It is a schematic diagram of the connection between the blade and the connecting rod of the utility model.

[0021] In the figure, 100, shell; 110, upper shell; 120, lower shell; 130, rotating space; 200, transmission shaft; 210, bushing; 220, spline shaft; 230, first positioning bearing; 240, second positioning bearing; 300, cam; 310, eccentric structure; 311, first eccentric disk; 312, second eccentric disk; 320, rotating bearing; 330, meshing groove; 400, connecting rod; 410, upper connecting rod; 420, lower connecting rod; 500, blade; 510, blade bearing. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings:

[0023] The directional nouns involved in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, the terms "setting", "installation", "connection", etc. should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0024] like Figures 1 to 6 As shown, a reciprocating scissors gearbox includes a housing 100, a transmission shaft 200, a cam 300, and a connecting rod 400. The housing 100 is composed of an upper housing 110 and a lower housing 120 that are buckled together, and a rotation space 130 is defined between the two; the transmission shaft 200 is rotatably embedded in the rotation space 130, and its two ends protrude out of the upper housing 110 and the lower housing 120 respectively; the cam 300 is sleeved in the middle of the transmission shaft 200 and meshed with the transmission shaft 200, and an eccentric structure 310 is provided on the opposite side walls of the cam 300; the connecting rod 400 is movably connected to the eccentric structure 310. In this way, when the transmission shaft 200 drives the cam 300 to rotate, the eccentric structure 310 arranged on the cam 300 rotates around the connection point between the transmission shaft 200 and the cam 300 as the axis. Thereby driving the connecting rod 400 connected to the eccentric structure 310 to reciprocate.

[0025] Optionally, a plurality of limiting columns are provided on opposite sides of the upper shell 110 and / or the lower shell 120 .

[0026] like Figure 2 As shown, the transmission shaft 200 includes a sleeve 210 and a spline shaft 220 , wherein the spline shaft 220 is meshedly connected with the cam 300 .

[0027] Optionally, one end of the spline shaft 220 is embedded in the shaft sleeve 210 and fixedly connected to the shaft sleeve 210 .

[0028] like Figure 2 and Figure 3 As shown, a first locating bearing 230 and a second locating bearing 240 are installed on the outer side wall of the spline shaft 220, wherein the first locating bearing 230 is located at the connection between the sleeve 210 and the spline shaft 220. In this way, the first locating bearing 230 and the second locating bearing 240 can limit the transmission shaft 200, ensuring that the transmission shaft 200 can be stably maintained in the middle of the housing 100 for continuous rotation, avoiding the deviation of the transmission shaft 200 during the rotation process, thereby improving the working stability of the transmission shaft 200.

[0029] Optionally, the first locating bearing 230 is adaptably connected to the upper shell 110 ; and the second locating bearing 240 is adaptably connected to the lower shell 120 .

[0030] like Figure 3 and Figure 4 As shown, the eccentric structure 310 includes a first eccentric disc 311, a second eccentric disc 312, and a rotary bearing 320, wherein the first eccentric disc 311 is located on one side of the cam 300, and the second eccentric disc 312 is located on the other side of the cam 300, and the rotary bearing 320 is installed on the outer side wall of the first eccentric disc 311 and the second eccentric disc 312. In this way, the rotary bearing 320 installed on the outer side wall of the first eccentric disc 311 and the second eccentric disc 312 avoids direct contact between the connecting rod 400 and the first eccentric disc 311 and / or the second eccentric disc 312, thereby improving the service life of the connecting rod 400, the first eccentric disc 311, and the second eccentric disc 312. At the same time, the friction between the connecting rod 400 and the first eccentric disc 311 and / or the second eccentric disc 312 is reduced by the rotary bearing 320, thereby improving the rotation efficiency of the connecting rod 400 and the first eccentric disc 311 and / or the second eccentric disc 312.

[0031] like Figure 4 As shown, the first eccentric disk 311 and the second eccentric disk 312 are arranged in a staggered manner. In this way, the first eccentric disk 311 and the second eccentric disk 312 can rotate around the transmission shaft 200 with the transmission shaft 200 as the axis under the drive of the transmission shaft 200, thereby driving the connecting rod 400 connected to the first eccentric disk 311 and the second eccentric disk 312 to perform reciprocating telescopic motion.

[0032] like Figure 4 As shown, a meshing groove 330 communicating with the second eccentric disc 312 is provided at a position adjacent to the center of the first eccentric disc 311 , and the meshing groove 330 is matched with the spline shaft 220 .

[0033] like Figure 4 As shown, the engagement groove 330 and the center of the cam 300 are on the same straight line.

[0034] like Figure 5 and Figure 6 As shown, the connecting rod 400 includes an upper connecting rod 410 and a lower connecting rod 420, wherein the upper connecting rod 410 is connected to the first eccentric disk 311, and the lower connecting rod 420 is connected to the second eccentric disk 312, and the upper connecting rod 410 and the lower connecting rod 420 overlap each other. In this way, as the first eccentric disk 311 and the second eccentric disk 312 rotate, the upper connecting rod 410 and the lower connecting rod 420 can perform telescopic movement in a staggered manner. That is, with the transmission shaft 200 as a reference, when the upper connecting rod 410 extends in the direction away from the transmission shaft 200, the lower connecting rod 420 retracts in the direction of the transmission shaft 200.

[0035] like Figure 6As shown, it also includes a plurality of blades 500, which are movably connected to the upper connecting rod 410 and the lower connecting rod 420, respectively, and the blades 500 in the same direction contact each other. In this way, the blades 500 connected to the upper connecting rod 410 or the lower connecting rod 420, driven by the first eccentric disk 311 and the second eccentric disk 312, perform synchronous telescopic movement with the upper connecting rod 410 and the lower connecting rod 420.

[0036] Optionally, the blade 500 is provided with a plurality of limiting grooves, which are adapted to be connected with limiting posts provided in the upper shell 110 and / or the lower shell 120. In this way, the limiting grooves and the limiting posts can cooperate with each other, so that the blade 500 can always perform linear telescopic movement following the first eccentric disk 311 and the blade 500 connected to the second eccentric table, thereby avoiding the blade 500 from deviating during the movement, thereby ensuring the shearing ability of the blade 500 and improving the operation stability of the blade 500.

[0037] Optionally, a blade bearing 510 is installed at the connection between the blade 500 and the upper connecting rod 410 and the lower connecting rod 420 .

[0038] Finally, although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A double-head hedge shears gearbox, comprising a housing (100), a transmission shaft (200), a cam (300), and a connecting rod (400), characterized in that: The housing is composed of an upper housing (110) and a lower housing (120) which are buckled together, and a rotation space (130) is defined between the two; the transmission shaft (200) is rotatably embedded in the rotation space (130), and its two ends respectively protrude outside the upper housing (110) and the lower housing (120); the cam (300) is sleeved in the middle of the transmission shaft (200) and meshes with the transmission shaft (200), and eccentric structures (310) are provided on the side walls opposite to the cam (300); and the connecting rod (400) is movably connected to the eccentric structure (310).

2. A double-head hedge trimmer gearbox according to claim 1, characterized in that: The transmission shaft (200) comprises a shaft sleeve (210) and a spline shaft (220), wherein the spline shaft (220) is meshingly connected with a cam (300).

3. A double-head hedge shears gearbox according to claim 2, characterized in that: A first locating bearing (230) and a second locating bearing (240) are mounted on the outer side wall of the spline shaft (220), wherein the first locating bearing (230) is located at the connection between the shaft sleeve (210) and the spline shaft (220).

4. A double-head hedge shears gearbox according to claim 1, characterized in that: The eccentric structure (310) comprises a first eccentric disk (311), a second eccentric disk (312), and a rotary bearing (320); the first eccentric disk (311) is located on one side of the cam (300), the second eccentric disk (312) is located on the other side of the cam (300), and the rotary bearing (320) is installed on the outer side walls of the first eccentric disk (311) and the second eccentric disk (312).

5. A double-head hedge shears gearbox according to claim 4, characterized in that: The first eccentric disc (311) and the second eccentric disc (312) are arranged in a staggered manner.

6. A double-head hedge shears gearbox according to claim 4, characterized in that: An engagement groove (330) communicating with the second eccentric disc (312) is provided at a position adjacent to the center of the first eccentric disc (311), and the engagement groove (330) is adapted to fit the spline shaft (220).

7. A double-head hedge trimmer gearbox according to claim 6, characterized in that: The engagement groove (330) and the center of the cam (300) are on the same straight line.

8. A double-head hedge shears gearbox according to claim 1, characterized in that: The connecting rod (400) comprises an upper connecting rod (410) and a lower connecting rod (420), wherein the upper connecting rod (410) is connected to the first eccentric disk (311), and the lower connecting rod (420) is connected to the second eccentric disk (312), and the upper connecting rod (410) and the lower connecting rod (420) overlap each other.

9. A double-head hedge shears gearbox according to any one of claims 1 to 8, characterized in that: It also includes a plurality of blades (500) which are movably connected to the upper connecting rod (410) and the lower connecting rod (420), respectively, and the blades (500) in the same direction are in contact with each other.

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