Grass winding prevention gearbox with working head capable of being rapidly replaced

Abstract

The utility model relates to the field of grass trimmers, in particular to a grass-twining-preventing gearbox with a working head capable of being replaced quickly, which comprises a machine head, an upper pressing plate and a grass-twining-preventing sheet. An output shaft of the machine head part comprises an assembly connecting section, a spline connecting section and a threaded connecting section which are sequentially arranged, and a packaging groove and a packaging hole are correspondingly formed in the machine head and the upper pressing plate, so that quick rotation stopping and assembly of equipment are realized. Compared with a gear box in grass trimmer equipment in the prior art, the gear box has the advantages that the assembly structure is more reasonable, quick replacement of the tool bit is realized through mutual matching of the assembly hole and the packaging groove, and the gear box has the effect of quick and flexible assembly; through mutual cooperation of the fan oil sheet, the oil seal and other equipment, the oil leakage prevention effect is achieved, meanwhile, it can be guaranteed that the meshing part is fully lubricated, and the service life of the equipment can be effectively prolonged; and through flexible combination of the upper pressing plate and the grass winding prevention sheet, the grass winding prevention effect of the machine head part is achieved, and the maintenance frequency is lower.

Description

Technical Field

[0001] The utility model relates to the field of grass trimmers, in particular to a grass-entanglement-proof gear box with a working head that can be quickly replaced. Background Art

[0002] A lawn mower is a common and frequently used gardening equipment. Its operating principle is to use the head part of the machine to drive the rapidly rotating mowing rope or blade to break the excessively high stems of flowers and plants, thereby achieving the purpose of trimming the lawn.

[0003] The head part of the mower in the prior art has certain defects in the implementation process. The main defect is that the head part of the mower is not reasonably set up and cannot be switched quickly, that is, when facing working environments with different intensities, the switching of blades or mowing ropes is relatively cumbersome; secondly, the power transmission of the mower is from the power equipment to the mowing head via the operating lever, involving multiple power connectors in the middle, and lubricating oil needs to be applied between the power connectors to ensure the service life of the equipment and smooth transmission. The transmission components or rotating mechanical parts of the mowing head are prone to oil leakage, resulting in poor operation of the mowing head and a short service life; thirdly, due to the enrichment of grass stalk fibers, the assembly position of the mower head and the operating lever is very easy to entangle with grass, resulting in poor operation or even stalling, affecting work efficiency and equipment service life. There is currently a lack of corresponding solutions to the above problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a kind of anti-grass entanglement gear box for the working head that can be quickly replaced, which can prevent oil leakage from the power mechanism of the grass trimming head part, has a reasonable connection structure to prevent grass entanglement, and has a simple assembly structure and can be quickly installed and disassembled.

[0005] The equipment includes a machine head, an upper pressure plate and anti-grass entanglement blades;

[0006] The machine head comprises a machine body shell, and the inner cavity of the machine body shell is provided with a power input unit and a power output unit;

[0007] The power input unit comprises an elastic retaining ring, a bearing and a driving gear, the driving gear is rotatably connected to the bearing, and an elastic retaining ring package is arranged on the driving gear;

[0008] The power output unit includes a bearing, a passive gear, an output shaft, an elastic retaining ring, an oil fan sheet and an oil seal; the upper part of the output shaft and the output shaft are provided with bearings respectively, and are encapsulated by an elastic retaining ring; an oil seal is also provided at the bottom of the elastic retaining ring;

[0009] The passive gear meshes with the active gear, and the passive gear is connected to the output shaft; an oil fan is provided on the output shaft between the output shaft and the bearing on its upper part; the oil fan includes a sleeve, which is fixedly provided on the output shaft, and outside the sleeve, a plurality of upwardly inclined fan blades are provided in an array; the effect achieved by this is that the lubricating oil slides downward due to its own weight, and the lubricating oil is raised to the meshing position of the active gear and the passive gear through the rotation of the oil fan, so as to ensure that the transmission position is always infiltrated with lubricating oil;

[0010] The output shaft is integrally arranged, including an assembly connection section, a spline connection section and a threaded connection section arranged in sequence;

[0011] An upper pressing plate is sleeved on the threaded connection section, and the upper pressing plate includes a centrally arranged spline notch, and its edge is arranged upward;

[0012] The upper pressing plate is centrally arranged on the anti-entanglement grass sheet;

[0013] The upper pressing plate is provided with a packaging groove, and the housing of the machine head is provided with an assembly hole; and the packaging groove and the assembly hole are arranged in a corresponding position up and down;

[0014] An upward guard plate is integrally extended from the edge of the anti-winding grass piece.

[0015] The beneficial effects of the utility model are as follows: compared with the gear box in the grass trimmer equipment in the prior art, the assembly structure of the utility model is more reasonable, and the quick replacement of the cutter head is achieved through the mutual cooperation of the assembly hole and the packaging groove, and the assembly is quick and flexible; through the mutual cooperation of equipment such as the oil fan sheet and the oil seal, while achieving the effect of preventing oil leakage, it can ensure that the meshing part is fully lubricated, and can effectively extend the service life of the equipment; and through the flexible combination of the upper pressure plate and the anti-grass entanglement sheet, the anti-grass entanglement effect of the machine head part is achieved, and the maintenance frequency is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a gear box for quickly replacing a working head to prevent grass entanglement as described in the utility model;

[0017] Figure 2 This is a schematic diagram of the assembly structure of a gear box capable of quickly replacing a working head to prevent grass entanglement according to the utility model;

[0018] Figure 3 is a schematic structural diagram of Example 1;

[0019] Figure 4 is a schematic diagram of the assembly structure of Example 1;

[0020] Figure 5 is a schematic structural diagram of Example 2;

[0021] Figure 6 is a schematic diagram of the assembly structure of Example 2;

[0022] Reference numerals:

[0023] 1-body shell 2-bearing 3-driving gear 4-passive gear 5-fan oil sheet 6-output shaft 7-elastic retaining ring 8-oil seal 9-sleeve 10-upper pressure plate 11-anti-grass blade 12-protective cover 13-cutting head 14-grass cutting head

[0024] 101-assembly hole 102-packaging slot

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The utility model discloses a quick-replaceable working head anti-grass entanglement gearbox, comprising a machine head, an upper pressing plate 10 and an anti-grass entanglement blade 11;

[0027] The machine head comprises a machine body shell 1, and the inner cavity of the machine body shell 1 is provided with a power input unit and a power output unit;

[0028] The power input unit comprises an elastic retaining ring 7, a bearing 2 and a driving gear 3, wherein the driving gear 3 is rotatably connected to the bearing 2, and an elastic retaining ring 7 is provided on the driving gear 3 for packaging;

[0029] The power output unit includes a bearing 2, a passive gear 4, an output shaft 6, an elastic retaining ring 7, an oil fan 5 and an oil seal 8; the bearing 2 is provided on the upper part of the output shaft 6 and on the output shaft 6, and is encapsulated by an elastic retaining ring 7; an oil seal 8 is also provided at the bottom of the elastic retaining ring 7; thereby achieving a rotational connection of the output shaft 6 based on the bearing 2 and avoiding oil leakage.

[0030] The passive gear 4 is meshed with the active gear 3, and the passive gear 4 is connected to the output shaft 6; an oil fan sheet 5 is arranged on the upper part of the output shaft 6 between the output shaft 6 and the bearing 2 on its upper part; the oil fan sheet 5 includes a sleeve, and the sleeve is fixedly arranged on the output shaft 6, and a plurality of upwardly inclined fan sheets are arranged in an array outside the sleeve; the effect achieved by this is that the lubricating oil slides downward due to its own weight, and the lubricating oil is raised to the meshing position of the active gear 3 and the passive gear 4 through the rotation of the oil fan sheet 5, ensuring that the transmission position is always infiltrated with lubricating oil;

[0031] The output shaft 6 is integrally arranged, including an assembly connection section, a spline connection section and a threaded connection section arranged in sequence;

[0032] An upper pressing plate 10 is sleeved on the threaded connection section, and the upper pressing plate 10 includes a centrally arranged spline notch, and its edge is arranged upwardly;

[0033] The effect achieved by this is that the upward section of the upper pressing plate 10 is encapsulated with the body shell 1;

[0034] The upper pressing plate 10 is centrally arranged on the anti-entanglement grass sheet 11;

[0035] The upper pressing plate 10 is provided with a packaging groove 102, and the housing 1 of the machine head is provided with an assembly hole 101; and the packaging groove 102 and the assembly hole 101 are arranged in a vertically corresponding position;

[0036] The edge of the anti-grass entanglement sheet 11 is integrally provided with an upward guard plate extending therefrom.

[0037] The effects achieved in this way are: first, by using assembly tools such as screwdrivers and other equipment, they are inserted downward from the packaging hole to the packaging groove 102, thereby locking the upper pressure plate 10, that is, the output shaft 6 is locked by the locking of the upper pressure plate 10; in this case, that is, when the upper pressure plate 10 locks the output shaft 6, the output shaft 6 does not rotate, and the tool can be quickly assembled on the threaded connection section at its bottom; second, the upper guard plate portion of the anti-grass entanglement sheet 11 is attached to the outside of the body shell 1, thereby preventing grass entanglement.

[0038] Furthermore, the passive gear 4 and the oil fan sheet 5 are arranged on the assembly connection section thereof; the assembly connection section is spline-connected to the passive gear 4, and a partition is arranged between the assembly connection section and the spline connection section.

[0039] Furthermore, a shaft sleeve 9 is provided between the output shaft 6 and the bearing 2 sleeved on the output shaft 6 .

[0040] Furthermore, the cover of the oil fan sheet 5 is packaged on the shaft sleeve 9 by interference fit.

[0041] Example 1, see the attached specification Figure 3 and Figure 4 The output shaft 6 is connected to the cutting head 13 by power. The cutting head 13 is encapsulated by the threaded connection section at the lower part of the output shaft 6 and the nut, and a protective cover 12 is arranged on the bottom surface thereof.

[0042] Example 2, refer to the accompanying drawings of the specification Figure 4 and Figure 5 The output shaft 6 is connected to the grass trimming head 14 by power, and the grass trimming head 14 is screwed on the threaded connection section at the lower part of the output shaft 6.

[0043] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims.

[0044] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gearbox for preventing grass from being entangled in a working head that can be replaced quickly, comprising a machine head, an upper pressure plate and an anti-grass entanglement sheet; the machine head comprises a machine body shell, and a power input unit and a power output unit are arranged in the inner cavity of the machine body shell; the power input unit comprises an elastic retaining ring, a bearing and a driving gear, the driving gear is rotatably connected with the bearing, and an elastic retaining ring is arranged on the driving gear for packaging; the power output unit comprises a bearing, a passive gear, an output shaft, an elastic retaining ring, an oil fan sheet and an oil seal; the upper part of the output shaft and the output shaft are respectively provided with bearings, and are packaged with an elastic retaining ring, and the characteristics are: An oil seal is also provided at the bottom of the elastic retaining ring; The passive gear is meshed with the active gear, and the passive gear is connected to the output shaft; an oil fan sheet is arranged on the upper part of the output shaft between the output shaft and the bearing on the upper part thereof; the oil fan sheet comprises a sleeve, and the sleeve is fixedly arranged on the output shaft, and a plurality of upwardly inclined fan sheets are arranged in an array outside the sleeve; The output shaft is integrally arranged, including an assembly connection section, a spline connection section and a threaded connection section arranged in sequence; An upper pressing plate is sleeved on the threaded connection section, and the upper pressing plate includes a centrally arranged spline notch, and its edge is arranged upward; The upper pressing plate is centrally arranged on the anti-entanglement grass sheet; The upper pressing plate is provided with a packaging groove, and the housing of the machine head is provided with an assembly hole; and the packaging groove and the assembly hole are arranged in a corresponding position up and down; An upward guard plate is integrally extended from the edge of the anti-winding grass piece.

2. The anti-grass gearbox with a quickly replaceable working head according to claim 1, characterized in that: The passive gear and the oil fan sheet are arranged on the assembly connection section thereof; the assembly connection section is spline-connected with the passive gear, and a partition is arranged between the assembly connection section and the spline connection section.

3. The anti-grass entanglement gearbox with a quickly replaceable working head according to claim 1 is characterized in that: A shaft sleeve is arranged between the output shaft and the bearing sleeved on the output shaft.

4. The anti-grass entanglement gearbox with a quickly replaceable working head according to claim 1, characterized in that: The sealing sleeve of the oil fan sheet is sealed on the shaft sleeve through interference fit.

5. The anti-grass entanglement gearbox with a quickly replaceable working head according to claim 1, characterized in that: The output shaft is dynamically connected to the cutting head. The cutting head is packaged by a threaded connection section at the lower part of the output shaft in cooperation with a nut, and a protective cover is arranged on the bottom surface thereof.

6. The anti-grass entanglement gearbox with a quickly replaceable working head according to claim 1, characterized in that: The output shaft is dynamically connected to a grass trimming head, and the grass trimming head is threadedly connected to a threaded connection section at the lower part of the output shaft.

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