Hoe shovel with shovel tip capable of being replaced quickly

Abstract

The utility model relates to a hoe shovel with a shovel tip capable of being replaced quickly. The hoe shovel structurally comprises a special wrench, a torsion spring base unit, a countersunk head square neck locking assembly, a shovel handle and an inner step shovel tip. The torsion spring base unit is fastened on the shovel handle through a countersunk head square neck locking assembly, and the inner step shovel tip is connected with the torsion spring base unit through a clamping groove of the inner step shovel tip, an inner step and a locking torsion spring in a torsion locking mode; the locking torsion spring is pressed down through a special wrench, the hook end is separated from the inner step end of the inner step shovel tip, and vertical fine adjustment of the inner step shovel tip is guaranteed. The adjusting height H of each step in the direction perpendicular to the ground is 1 cm.

Description

Technical Field

[0001] The utility model belongs to the technical field of agricultural machinery, and particularly relates to a hoe shovel with a quickly replaceable shovel tip. Background Art

[0002] A corn seedbed preparation combined operation machine (Patent No.: ZL202210013123.3) is applicable to a tillage and land preparation method (Patent No.: ZL202011032878.5) under the condition of full coverage of corn straw on the ground surface. It is a secondary land preparation in spring on the basis of autumn tillage, which can create a sowing bed with loose upper layer and solid lower layer, loose and flat. It can shallowly loosen the soil to increase soil air permeability, raise the ground temperature, regulate soil moisture and the distribution of straw in the plough layer. Seedbed preparation has positive significance for improving crop yield.

[0003] The hoe shovel is a key component of the seedbed preparation machine. During the operation of the machine, the shovel tip of the hoe shovel is a vulnerable part and often needs to be quickly replaced. And during the operation, it is necessary to finely adjust the working depth of the shovel tip according to the actual soil conditions.

[0004] At present, in the prior art, the hoe shovel and the shovel handle are rigidly connected by bolts. When adjusting the depth individually or replacing the shovel tip, it is necessary to disassemble the bolts and nuts on the shovel handle or the hoe shovel. First, use a wrench to remove the bolts and nuts, and then move the hole positions up and down and lock them. It is time-consuming and laborious during adjustment; due to the rigid connection between the hoe shovel and the shovel handle, the contact area between the shovel tip and the soil remains unchanged during operation, resulting in problems such as large resistance, fast wear and low efficiency.

[0005] The utility model provides a shovel tip device with simple connection and independent fine adjustment and quick replacement, which solves the problems of difficult replacement, large resistance and fast wear of the hoe shovel in the prior art; not only realizes the quick and independent adjustment of the shovel tip of the hoe shovel, but also effectively reduces the labor intensity of the operator; through the elastic connection between the hoe shovel and the shovel handle, self-excited vibration is generated, which can effectively reduce the resistance between the soil, reduce the wear of the hoe shovel and improve the operation efficiency. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a hoe shovel with a quickly replaceable shovel tip, which realizes the quick fine adjustment, replacement of the depth of a single shovel tip and reduction of resistance by self-excited vibration during the seedbed preparation operation, ensures the quality of cultivated land, improves the operation efficiency and reduces the working intensity of the operator.

[0007] To achieve the above purpose, the present invention provides the following technical solutions:

[0008] A shovel tip with quick replacement, including a special wrench 1, a torsion spring base unit 2, a countersunk square neck locking assembly 3, a shovel handle 4, and an inner stepped shovel tip 5; the torsion spring base unit 2 is fastened to the shovel handle 4 through the countersunk square neck locking assembly 3, and the inner stepped shovel tip 5 is connected to the torsion spring base unit 2 by means of its own card slot 53, inner step 52 and locking torsion spring 21 in a torsion locking manner; by pressing down the locking torsion spring 21 with the special wrench 1, the hook end 213 is disengaged from the end of the inner step 52 of the inner stepped shovel tip 5 to ensure the up and down fine adjustment of the inner stepped shovel tip 5; the adjustment height of each step is 1 cm in the vertical direction H perpendicular to the ground.

[0009] The special wrench 1 includes an upper hook tooth 11, a lower hook tooth 12 and a handle 13; the upper hook tooth 11 is stuck on the inner surface of the end face of the upper handle of the shovel tip, and the lower hook tooth 12 is in contact and cooperation with the surface of the locking torsion spring through the wrench empty hole 51.

[0010] The torsion spring base unit 2 includes a locking torsion spring 21 and a wedge-shaped base 22; the locking torsion spring 21 is provided with a locking torsion spring body 211, a locking torsion spring L end 212 and a locking torsion spring hook end 213; the wedge-shaped base 22 is provided with a torsion spring installation square empty hole 221, a torsion spring installation L-shaped empty groove 222, a base first connection bolt hole 223, a base second connection bolt hole 224, a wedge surface 225, and a base body 226; the locking torsion spring body 211 is placed in the torsion spring installation square empty hole 211, the side surface of the locking torsion spring L end is attached to the bottom surface of the torsion spring installation L-shaped empty groove 222, and the locking torsion spring hook end 213 is above the groove of the base body 226.

[0011] The countersunk square neck locking assembly 3 includes a bolt 31, a locking gasket 32, and a locking nut 33.

[0012] The shovel handle 4 includes a first bolt hole 41, a second bolt hole 42 for fixing the torsion spring base unit 2, and a shovel handle body 43.

[0013] The inner stepped shovel tip 5 is provided with a wrench empty hole 51, an inner step 52, a card slot 53 and a shovel tip body 54.

[0014] Furthermore, for the locking torsion spring 21, the included angle formed by the torsion spring hook end 213 and the torsion spring L end is β in the free state and α in the working state, and satisfies the following equation:

[0015]

[0016] In the formula, β is the included angle between the L end and the hook end of the locking torsion spring in the free state, with a value of 30°; α is the included angle between the L end and the hook end of the locking torsion spring in the working state, with a value of 20°; D is the inner diameter of the torsion spring body, with a value of 24 mm; d is the wire diameter of the torsion spring, with a value of 8 mm; n is the number of effective turns of the torsion spring, with a value of 3; L2 is the length of the torsion spring hook end, with a value of 80 mm.

[0017] During the operation, when the soil resistance is too large, the shovel tip will compress the spring. When the soil resistance decreases, the spring will return to its initial state, generating a continuous self-excited vibration, thus reducing the resistance and improving the operation efficiency.

[0018] The beneficial effects of the present utility model are as follows:

[0019] 1. The present utility model has a spring locking mechanism, which realizes the independent, rapid fine adjustment and replacement of the shovel tip;

[0020] 2. During the process of replacing the shovel tip of the present utility model, there is no need to operate the bolts for tightening and loosening, which can reduce the labor intensity of the operator, saving time and effort;

[0021] 3. Through the stepped structure of the shovel tip of the present utility model, it is beneficial to adjust the operation depth of the shovel tip with higher precision according to the soil conditions;

[0022] 4. The L end and the hook end of the locking torsion spring of the present utility model interact with each other, enabling the shovel tip to have the function of self-excited vibration, achieving the technical effects of reducing resistance, reducing wear, and improving operation efficiency. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of a shovel tip quick replacement hoe of the present utility model;

[0024] Figure 2 It is a front view of a shovel tip quick replacement hoe of the present utility model;

[0025] Figure 3 It is a partial cross-sectional view of a shovel tip quick replacement hoe of the present utility model;

[0026] Figure 4 It is a schematic structural diagram of the torsion spring base unit of the present utility model;

[0027] Figure 5 It is a schematic structural diagram of a special wrench of the present utility model;

[0028] Figure 6 It is a schematic structural diagram of the locking torsion spring of the present utility model;

[0029] Figure 7 It is a schematic structural diagram of the fixed torsion spring base of the present utility model;

[0030] Figure 8 It is a schematic structural diagram of the hoe shovel tip of the present utility model;

[0031] Figure 9 It is a schematic structural diagram of the shovel handle of the present utility model;

[0032] Figure 10Schematic diagram of the countersunk square neck locking assembly of the present utility model;

[0033] Figure 11-1 Schematic diagram of the locking torsion spring of the present utility model in the free state;

[0034] Figure 11-2 Schematic diagram of the locking torsion spring of the present utility model in the working state.

[0035] Explanation of reference numerals: 1 - special wrench, 11 - upper hook teeth, 12 - lower hook teeth, 13 - handle; 2 - torsion spring base unit, 21 - locking torsion spring, 211 - locking torsion spring body, 212 - L end of the locking torsion spring, 213 - hooked end of the locking torsion spring, 22 - wedge-shaped base, 221 - square vacancy hole for torsion spring installation, 222 - L-shaped vacancy groove for torsion spring installation, 223 - first connection bolt hole of the base, 224 - second connection bolt hole of the base, 255 - wedge-shaped surface, 266 - base body; 3 - countersunk square neck locking assembly, 31 - including bolt, 32 - locking gasket, 33 - locking nut; 4 - shovel handle, 41 - U-shaped bolt hole, 42 - circular bolt hole, 43 - shovel handle body; 5 - inner stepped shovel tip, 51 - wrench vacancy hole, 52 - inner step, 53 - clamping groove, 54 - shovel tip body. Detailed implementation manners

[0036] The embodiments of the technical solution of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solution of the present utility model more clearly, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0037] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which the present invention belongs.

[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0039] As Figure 1 、 Figure 2 、 Figure 3 shown, a kind of shovel tip quick-change hoe of the present utility model includes a special wrench 1, a torsion spring base unit 2, a countersunk square neck locking assembly 3, a shovel handle 4, and an inner stepped shovel tip 5.

[0040] As Figure 5 shown, the special wrench 1 is provided with upper hook teeth 11, lower hook teeth 12, and a handle 13.

[0041] As Figure 4 、 Figure 6 、 Figure 7As shown in the figure, the torsion spring base unit 2 includes a locking torsion spring 21 and a wedge-shaped base 22. The locking torsion spring 21 is provided with a locking torsion spring body 211, a locking torsion spring L end 212, and a locking torsion spring hook end 213; the wedge-shaped base 22 is provided with a torsion spring installation square vacant hole 221, a torsion spring installation L-shaped vacant groove 222, a base first connection bolt hole 223, a base second connection bolt hole 224, a wedge surface 225, and a base body 226.

[0042] The locking torsion spring body 211 is placed in the torsion spring installation square vacant hole 221, the side surface of the locking torsion spring L end is attached to the bottom surface of the torsion spring installation L-shaped vacant groove 222, and the locking torsion spring hook end 213 is above the groove of the base body 226.

[0043] As Figure 10 shown in the figure, the countersunk square neck locking assembly 3 includes a countersunk square neck screw pair 31, a locking gasket 32, and a locking nut 33.

[0044] As Figure 9 shown in the figure, the shovel handle 4 is provided with a U-shaped bolt hole 41, a circular bolt hole 42, and a shovel handle body 43.

[0045] As Figure 8 shown in the figure, the inner stepped shovel tip 5 is provided with a wrench vacant hole 51, an inner step 52, a card slot 53, and a shovel tip body 54.

[0046] Preferably, the distance between each step of the inner step 52 in the vertical direction is 1 centimeter.

[0047] The torsion spring base unit 2 is detachably connected to the shovel handle 4 through the countersunk square neck locking assembly 3.

[0048] The countersunk square neck bolt assembly 3 passes through the base first connection bolt hole 223 and the shovel handle U-shaped bolt hole 41, and the base second connection bolt hole 224 and the shovel handle circular bolt hole 42, so that the shovel handle 4 is detachably connected to the torsion spring base unit 2.

[0049] The countersunk square neck bolt assembly 3 passes through the base first connection bolt hole 223 and the shovel handle U-shaped bolt hole 41, and the base second connection bolt hole 224 and the shovel handle circular bolt hole 42, so that the shovel handle 4 is detachably connected to the torsion spring base unit 2.

[0050] As Figure 11-1 and Figure 11-2 shown in the figure, both the torsion spring hook end 213 and the torsion spring L end 212 are tangent to the torsion spring body 211, and the included angle formed by the torsion spring hook end 213 and the torsion spring L end is β in the free state and α in the working state. The following equation is satisfied.

[0051]

[0052] In the formula, β is the included angle between the L end and the hook end of the locking torsion spring in the free state, with a value of 30°; α is the included angle between the L end and the hook end of the locking torsion spring in the working state, with a value of 20°; D is the inner diameter of the torsion spring body, with a value of 24 mm; d is the wire diameter of the torsion spring, with a value of 8 mm; n is the number of effective turns of the torsion spring, with a value of 3; L2 is the length of the hook end of the torsion spring, with a value of 80 mm.

[0053] The inner stepped shovel tip 5 is slidably engaged with the wedge surface 225 of the wedge-shaped base 22 in the torsion spring base unit 2 through its own card slot 53. The inner step 52 is clamped and engaged with the locking torsion spring hook end 213 of the locking torsion spring 21, and is fixed on the torsion spring base unit 2 under the combined action of the locking force of about 28 kg generated by the locking torsion spring 21.

[0054] The above are only the embodiments of the present invention, and do not limit the protection scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related system fields, shall be similarly included in the protection scope of the present invention.

Claims

1. A hoe shovel with a quick-change shovel tip, characterized in that: It comprises a special wrench (1), a torsion spring base unit (2), a countersunk square neck locking assembly (3), a shovel handle (4), and an inner step shovel tip (5); The special wrench (1) comprises an upper hook tooth (11), a lower hook tooth (12) and a handle (13); the upper hook tooth (11) is clamped on the inner surface of the upper handle end face of the shovel tip, and the lower hook tooth (12) contacts and cooperates with the surface of the locking torsion spring through the wrench vacant hole (51); The torsion spring base unit (2) comprises a locking torsion spring (21) and a wedge-shaped base (22); the two ends of the locking torsion spring (21) are respectively an L-shaped locking torsion spring L end (212) and a hook-shaped locking torsion spring bent hook end (213); the wedge-shaped base (22) is provided with a torsion spring installation square vacant hole (221), a torsion spring installation L-shaped vacant groove (222), a base first connecting bolt hole (223), a base second connecting bolt hole (224), a wedge-shaped surface (225), and a base body (226); The locking torsion spring body (211) is placed in the torsion spring installation square vacant hole (221), the L-end side of the locking torsion spring fits with the bottom surface of the torsion spring installation L-shaped vacant slot (222), and the locking torsion spring hook end (213) is above the groove of the base body (226); The countersunk square neck locking assembly (3) comprises a bolt (31), a locking washer (32), and a locking nut (33); The shovel handle (4) comprises a first bolt hole (41) for fixing the torsion spring base unit (2), a second bolt hole (42) and a shovel handle body (43); the torsion spring base unit (2) and the shovel handle (4) are fixedly connected through the countersunk square neck locking assembly (3) passing through the first bolt hole (41) and the second bolt hole (42); The inner step shovel tip (5) comprises a wrench vacant hole (51), an inner step (52), a clamping groove (53) and a shovel tip body (54); the inner step shovel tip (5) is connected to the torsion spring base unit (2) by means of torsion locking via its own clamping groove (53), the inner step (52) and the locking torsion spring (21).

2. A hoe shovel with quick shovel tip change according to claim 1, characterized in that: The angle formed by the torsion spring hook end (213) of the locking torsion spring (21) and the torsion spring L end is β in the free state and α in the working state, and satisfies the following equation: In the formula, the angle between the L end and the hook end of the β locking torsion spring in the free state is 30°; the angle between the L end and the hook end of the α locking torsion spring in the working state is 20°; D is the inner diameter of the torsion spring body, which is 24mm; d is the wire diameter of the torsion spring, which is 8mm; n is the effective number of torsion spring turns, which is 3; L2 is the length of the hook end of the torsion spring, which is 80mm.

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