Transmission shaft telescopic shield of folding field returning machine

Abstract

The utility model belongs to the technical field of tillage and soil preparation mechanical equipment, and particularly relates to a transmission shaft telescopic protective cover of a folding returning machine, which comprises a first protective cover body and a second protective cover body, one end of the first protective cover body extends into the second protective cover body, the first protective cover body moves relative to the second protective cover body in the direction limited by the guide structure, and the first protective cover body and the second protective cover body form a telescopic protective cover capable of being stretched and shortened and protect a transmission shaft arranged in the telescopic protective cover. The first protective cover body and the second protective cover body are both provided with connecting structures, and the two connecting structures are both connected with the folding field returning machine so that folding and unfolding of the telescopic protective cover can be achieved when the folding field returning machine is folded.

Description

Technical Field

[0001] The utility model relates to the technical field of tillage equipment, in particular to a telescopic shield for a transmission shaft of a foldable land-reclaiming machine. Background Art

[0002] In foldable tillage machines, foldable rotary tillers, foldable paddy field machines and other foldable tillage machines, the power received by the transmission box needs to be transmitted through the drive shaft. Since the high-speed rotation of the drive shaft will also bring great safety hazards, it is necessary to use a protective cover to cover the drive shaft. However, the existing drive shaft guard is integrated and cannot be retracted to change its length. In foldable tillage machines, the position and connection status of the protective cover will change when the equipment is unfolded or folded. Therefore, a retractable protective cover structure suitable for foldable tillage machines is needed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a telescopic shield for the transmission shaft of a foldable tillage machine, which is suitable for being connected with a foldable tillage machine and can adapt to the actions of the equipment such as unfolding or folding, so as to better isolate the transmission shaft from the outside world and play a role of isolation and protection.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: a telescopic shield for the transmission shaft of a foldable farmland returning machine, comprising a first shield body and a second shield body, a guide structure is arranged inside the second shield body, one end of the first shield body extends into the interior of the second shield body and moves relative to the second shield body along the direction defined by the guide structure, the internal space of the first shield body and the internal space of the second shield body form a transmission shaft protection space, and a rotating connection structure is arranged on the first shield body and the second shield body. One end of the first shield body extends into the second shield body, the first shield body can move relative to the second shield body along the direction defined by the guide structure, the first shield body and the second shield body are combined to form a telescopic shield, the telescopic shield is respectively hinged with the gearbox and the transmission box of the foldable agricultural machinery through two rotating connection structures, and the telescopic shield can be adaptively extended or shortened when the foldable agricultural machinery is unfolded or folded.

[0005] As an optional solution, a rotating connection structure is provided at the end of the first shield body away from the second shield body and at the end of the second shield body away from the first shield body, and the rotating connection structure is a hinge.

[0006] As an optional solution, the bottom end of the second shield body is open, and the guide structure is a guide groove formed by bending inward at the bottom end of the second shield body. The bottom end of the first shield body is open, and the bottom end of the first shield body is bent inward to form a guide edge. The guide edge extends into the guide groove and the first shield body moves along the guide groove.

[0007] As an optional solution, the guide structure is a slide rail, and a slide rail matching structure is provided on the first shield body.

[0008] As an optional solution, a second reinforcement cover is provided at both ends of the second shield body, a first reinforcement cover is sleeved at the end of the first shield body outside the second shield body, a rotating connection structure is provided on the first reinforcement cover and the second reinforcement cover away from the first shield body, and a reinforcement ridge is provided on the outside of the other second reinforcement cover. The second shield body is structurally reinforced by the second reinforcement cover and the reinforcement ridge, and the first shield body is structurally reinforced by the first reinforcement cover.

[0009] As an optional solution, reinforcing rib plates are provided inside the first shield body and the second shield body.

[0010] As an optional solution, reinforcing ribs are provided at both ends of the first shield body and at an end of the second shield body away from the first shield body.

[0011] As an optional solution, the second shield body is provided with an observation hole and / or a heat dissipation hole.

[0012] Compared with the prior art, the utility model has the following beneficial effects: a guide structure is provided in the second shield body, the first shield body extends into the second shield body and can move relative to the second shield body in the direction limited by the guide structure, the first shield body and the second shield body are combined to form a telescopic shield that can be extended or shortened, the internal space of the first shield body and the internal space of the second shield body are combined to form a transmission shaft protection space, and a rotating connection structure is provided at both ends of the telescopic shield. The telescopic shield can be rotatably connected to the corresponding parts of the folding farmland return machine or other folding tillage equipment through the two rotating connection structures, and at the same time, the telescopic shield protects the transmission shaft of the equipment in the transmission shaft protection space, and during the unfolding or folding process of the folding tillage equipment, the telescopic shield can adaptively extend or shorten, and can rotate relative to the folding tillage equipment to maintain a stable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the external structure of the transmission shaft telescopic cover;

[0015] Figure 2 It is a schematic diagram of the internal structure of the transmission shaft telescopic cover;

[0016] Figure 3 It is a schematic diagram of applying the transmission shaft telescopic cover to the folding field returning machine;

[0017] In the figure: 1. first protective cover body, 2. second protective cover body, 3. guide structure, 4. rotating connection structure, 5. second reinforced cover, 6. reinforced edge plate, 7. first reinforced cover, 8. reinforced rib plate, 9. folding field return machine. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example: See Figure 1-Figure 3 A transmission shaft telescopic shield of a foldable farmland returning machine comprises a first shield body 1 and a second shield body 2. A second protective space is arranged inside the second shield body 2. A guide structure 3 is arranged inside the second protective space. The second protective space passes through two opposite ends of the second shield body 2 in the guide direction of the guide structure 3. The bottom end of the second shield body 2 is open and the second shield body 2 is in a U-shaped shield structure as a whole. A first protective space is arranged inside the first shield body 1. Like the second shield body 2, the first protective space passes through two opposite ends of the first shield body 1. The bottom end of the first shield body 1 is also open and the first shield body 1 is also in a U-shaped shield structure as a whole.

[0020] One end of the first shield body 1 extends into the second protection space. Under the guidance of the guide structure 3, the first shield body 1 moves in the direction defined by the guide structure 3. The first shield body 1 and the second shield body 2 form a telescopic shield that can be extended or shortened. When the telescopic shield is extended, the first shield body 1 moves relative to the second shield body 2 in the direction defined by the guide structure 3 toward the outside of the second shield body 2. When the telescopic shield is shortened, the first shield body 1 moves relative to the second shield body 2 in the direction defined by the guide structure 3 toward the inside of the second shield body 2. The transmission shaft protection space in the telescopic shield is composed of the second protection space and part of the first protection space. As the telescopic shield is extended or shortened, the transmission shaft protection space also becomes longer or shorter.

[0021] A rotating connection structure 4 is provided on the first protective cover body 1 and the second protective cover body 2. The two rotating connection structures 4 are respectively located at the two ends of the protective space and at the two ends of the telescopic protective cover. The rotating connection structure 4 is used to connect with a folding farmland return machine or other folding tillage equipment so as to apply the telescopic protective cover to the corresponding equipment. Under the action of the rotating connection structure 4, the telescopic protective cover can rotate relative to the connection with the folding tillage equipment.

[0022] See also Figure 3 Taking the application of the transmission shaft telescopic shield to the folding farmland machine 9 as an example, when in use, one of the rotating connection structures 4 is connected to the gearbox located in the middle of the folding farmland machine 9, and the rotating connection structure 4 can rotate relative to the connection with the gearbox, and the other rotating connection structure 4 is connected to the transmission box located at the end of the folding farmland machine 9, and the rotating connection structure 4 can rotate relative to the connection with the transmission box, and the transmission shaft connecting the transmission box and the transmission box is located in the protective space. When the folding farmland machine 9 is unfolded or folded, the rotating connection structure 4 rotates relative to its installation connection, and the telescopic shield adapts to the expansion and contraction changes.

[0023] See also Figure 1-Figure 3 As a specific example of the rotating connection structure 4, the rotating connection structure 4 is a hinge. The rotating connection structure 4 on the first shield body 1 is located at a position on the top of the first shield body 1 away from the second shield body 2, and the rotating connection structure 4 on the second shield body 2 is located at a position on the top of the second shield body 2 away from the first shield body 1. The two connecting ends of the hinge are hinged and can rotate relative to each other, one end is used to connect with the first shield body 1 or the second shield body 2, and the other end is used to connect with a transmission box or a gearbox of an equipment.

[0024] See also Figure 1 and Figure 2 In some embodiments, the bottom end of the second protective shield body 2 is open, and the two side edges at the bottom end of the second protective shield body 2 are bent toward the inside of the second protective shield body 2 to form a guide groove, which is the guide structure 3 arranged in the second protective space. The bottom end of the first protective shield body 1 is open, and the two side edges at the bottom end of the first protective shield body 1 respectively cooperate with the two guide grooves, so that the first protective shield body 1 can move along the guide groove to realize the extension and shortening of the telescopic shield.

[0025] In a further embodiment, in order to prevent the first shield body 1 from being deformed, both side edges at the bottom end of the first shield body 1 are also bent inwards to form guide edges, and the two guide edges are respectively inserted into the two guide grooves.

[0026] In some embodiments, the guide structure 3 is a slide rail, which is arranged on the inner wall of the second shield body 2, and a slide rail matching structure is arranged on the first shield body 1, which is a slider or a pulley.

[0027] See also Figure 1 and Figure 2 In order to improve the structural strength of the second shield body 2, in some embodiments, a second reinforcement cover 5 is provided at both ends of the outside of the second shield body 2. The shape of the second reinforcement cover 5 is the same as that of the second shield body 2. The length of the second reinforcement cover 5 in the length direction of the guide structure 3 is less than the length of the second shield body 2. The second reinforcement cover 5 is buckled on the outside of the second shield body 2 and connected to the second shield body 2. The two second reinforcement covers 5 reinforce the second shield body 2 at both ends of the second shield body 2. A first reinforcement cover 7 is sleeved at the end of the first shield body 1 outside the second shield body 2. The shape of the first reinforcement cover 7 is the same as that of the first shield body 1. The length of the first reinforcement cover 7 in the length direction of the guide structure 3 is less than the length of the first shield body 1. The first reinforcement cover 7 is buckled on the outside of the first shield body 1 and connected to the first shield body 1. The first reinforcement cover 7 reinforces the first shield body 1. The two rotating connection structures 4 are respectively arranged on the first reinforcement cover 7 and the second reinforcement cover 5 away from the first protective cover body 1. The outside of the other second reinforcement cover 5 is provided with a reinforcement ridge 6. The reinforcement ridge 6 is a semi-annular plate. The shape of the inner edge of the reinforcement ridge 6 is the same as the cross-sectional shape of the second reinforcement cover 5. The inner edge of the reinforcement ridge 6 is fixedly connected to the outer surface of the second reinforcement cover 5 to prevent the second reinforcement cover 5 from deformation.

[0028] In order to further improve the structural strength of the first shield body 1 and the second shield body 2, the first shield body 1 and the second shield body 2 are both provided with reinforcing ribs 8 inside. The reinforcing ribs 8 can be conventional reinforcing ribs or semi-annular reinforcing ribs, such as Figure 2 As shown, the outer edge shape of the semi-annular reinforcement rib is the same as the cross-sectional shape of the first protective shield body 1 or the second protective shield body 2, and the semi-annular reinforcement rib is fixedly connected to the inner wall of the first protective shield body 1 or the second protective shield body 2, thereby structurally reinforcing the first protective shield body 1 or the second protective shield body 2.

[0029] In some embodiments, the second protective cover body 2 is provided with an observation hole and / or a heat dissipation hole. When the observation hole is provided, personnel can observe the situation inside the second protective cover body 2 from the outside of the equipment to determine whether manual cleaning of the inside of the telescopic protective cover is required; when the heat dissipation hole is provided, the heat generated by the rotation of the transmission shaft, the transmission rotation and the friction with debris entering the telescopic protective cover can be dissipated from the heat dissipation hole.

[0030] In the description of this specification, the description of reference terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A telescopic shield for a transmission shaft of a foldable farmland returning machine, characterized in that: The invention comprises a first shield body (1) and a second shield body (2), wherein a guide structure (3) is arranged inside the second shield body (2), one end of the first shield body (1) extends into the interior of the second shield body (2) and moves relative to the second shield body (2) along a direction defined by the guide structure (3), the internal space of the first shield body (1) and the internal space of the second shield body (2) form a transmission shaft protection space, and a rotation connection structure (4) is arranged on both the first shield body (1) and the second shield body (2).

2. The transmission shaft telescopic shield of the foldable farmland returning machine according to claim 1, characterized in that: A rotating connection structure (4) is provided at an end of the first shield body (1) away from the second shield body (2) and at an end of the second shield body (2) away from the first shield body (1), and the rotating connection structure is a hinge.

3. The transmission shaft telescopic shield of the foldable farmland returning machine according to claim 2, characterized in that: The bottom end of the second shield body (2) is open, and the bottom end of the second shield body (2) is bent inwards to form a guide groove, and the guide groove is a guide structure (3). The bottom end of the first shield body (1) is open, and the bottom end of the first shield body (1) is bent inwards to form a guide edge, and the guide edge extends into the guide groove and the first shield body (1) moves along the guide groove.

4. The transmission shaft telescopic shield of the foldable farmland returning machine according to claim 2, characterized in that: The guide structure (3) is a slide rail, and a slide rail matching structure is provided on the first shield body (1).

5. The transmission shaft telescopic shield of the folding farmland returning machine according to claim 3 or 4, characterized in that: Second reinforcement covers (5) are provided at both ends of the exterior of the second shield body (2); a first reinforcement cover (7) is sleeved at the end of the first shield body (1) located outside the second shield body (2); a rotation connection structure (4) is provided on the first reinforcement cover (7) and on the second reinforcement cover (5) away from the first shield body (1); and a reinforcement ridge plate (6) is provided on the exterior of the other second reinforcement cover (5).

6. The transmission shaft telescopic shield of the foldable farmland returning machine according to claim 5, characterized in that: Reinforcing rib plates (8) are provided inside the first shield body (1) and the second shield body (2).

7. The transmission shaft telescopic shield of the foldable farmland returning machine according to claim 6, characterized in that: Reinforcing rib plates (8) are provided at both ends inside the first shield body (1) and at an end inside the second shield body (2) away from the first shield body (1).

8. The transmission shaft telescopic shield of the foldable farmland returning machine according to claim 1, characterized in that: The second shield body (2) is provided with an observation hole and / or a heat dissipation hole.

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