Spherical hook connecting device

Abstract

The utility model discloses a spherical hook connecting device. The spherical hook connecting device comprises a connecting seat and a hook, the cup base is arranged at the upper part of the connecting base and is provided with a downward opening; the upper portion of the connecting ball is matched with an inner cavity of the cup base, and a plurality of oil grooves are formed in the surface of the connecting ball. The clamping plate is of an annular structure, the middle of the clamping plate is matched with the lower portion of the connecting ball, a first through hole is formed in the upper edge of the clamping plate, and the clamping plate is fixedly connected with the connecting base through the first through hole; the upper part of the ball seat is matched with a central hole of the connecting ball; and the traction rod is connected with the lower part of the ball seat. The contact surface of spherical connection is effectively increased, the possibility of longitudinal movement and the overall stability are reduced, and the overall structure can bear larger load in a more stable state.

Description

Technical Field

[0001] This utility model relates to the field of tractor parts, and in particular to a spherical hook connecting device. Background Technology

[0002] Traditional tractor attachments are connected via a spherical hook connection. This device restricts the longitudinal movement of the attachment by limiting the outer spherical surface of the connecting seat with a pressure rod to prevent detachment. For example, the agricultural tractor attachment disclosed in Chinese Patent CN205284075U includes a attachable mounting base with an integrally formed spherical hook post. A left and right pressure plate brackets are fixedly mounted on the mounting base. A pressure plate is hinged between the left and right pressure plate brackets via a rotating shaft. One end of the pressure plate has a hole for a resilient pin to pass through. Both the left and right pressure plate brackets have pin positioning holes. A resilient pin engages with the pin positioning hole and the hole to fix the pressure plate. The resilient pin is mounted on the attachable mounting base via a pin bracket. The attachable mounting base, spherical hook post, left and right pressure plate brackets, and pin bracket are all made of cast steel. The structure consists of a trailer mount and a spherical hook post integrally formed from the trailer mount. The spherical hook post mates with the hook groove of the hook, increasing the contact area between the spherical hook post and the hook groove.

[0003] However, the above structure still has some problems: the contact surface of the spherical hook post is small, the connection stability is weak, the overall connection stability is poor, and the sphere is difficult to disassemble. Utility Model Content

[0004] This utility model provides a spherical hook connection device, which effectively increases the contact surface of the spherical connection, reduces the possibility of longitudinal movement and overall stability, and the overall structure can withstand greater loads in a more stable state.

[0005] A spherical hook connection device includes: a connecting seat, which is connected to an attachment; and a cup seat, which is disposed on the upper part of the connecting seat and has an opening facing downward. The top of the cup seat is provided with an oil cup for containing lubricating oil. Grease can be added to the surface of the connecting ball to delay wear of the connecting ball.

[0006] A connecting ball is provided, the upper part of which mates with the inner cavity of the cup holder. Several oil grooves are provided on the surface of the connecting ball. The oil grooves can be annular oil grooves. The planes of the oil grooves are horizontally arranged, and the planes of the multiple oil grooves are parallel to each other. The oil grooves are used to hold grease for lubrication.

[0007] The card plate has a ring structure. The middle part of the card plate and the lower part of the connecting ball cooperate. The card plate is set in the lower half of the connecting ball, which has better connection stability when longitudinal movement occurs. The upper edge of the card plate is provided with a first through hole. The card plate is fixedly connected to the connecting seat through the first through hole. There are 3 first through holes. The card plate, connecting ball and connecting seat are fixed together through the first through holes, and the connecting ball is locked between the cup seat and the card plate.

[0008] A ball seat, the upper part of which is connected to the internal threaded hole of the connecting ball; a drawbar, one end of which is fixedly connected to the lower part of the ball seat and the other end of which is connected to the tractor. The attachment is connected to the tractor by fixing one end of the drawbar to the tractor body.

[0009] This utility model uses a cup holder and a card plate to connect and cover the connecting ball on the traction rod, and restricts the connecting ball between the card plate and the cup holder so that the connecting ball and the connecting seat will not detach. The card plate increases the contact surface between the cup holder and the connecting ball, making the connection more stable and realizing a 3D spherical connection, allowing the traction rod and the connecting seat to rotate arbitrarily in 3D space without falling off.

[0010] Preferably, the diameter of the connecting ball is 80-150mm, the upper part of the cup holder is a hemispherical inner spherical cavity, and the lower part of the cup holder is an inner cylindrical section connecting the inner spherical cavity. The length of the inner cylindrical section is ≥15mm; if this size is too small, the guiding effect will be poor and installation will be inconvenient. The inner spherical surface of the cup holder matches the outer spherical surface of the connecting ball. The cup holder has an inner cylindrical section ≥15mm from the center of the inner spherical surface, which has a guiding function, facilitating the insertion of the connecting ball into the connecting seat, and ensuring that the connecting ball will not fall off during the connection process.

[0011] Preferably, the connecting seat is L-shaped, comprising a horizontal portion and a vertical portion. The vertical portion has two rows of second through holes, and the horizontal portion has a third through hole. The L-shaped structure provides a larger inner space, resulting in high space utilization and a compact structure. The second through holes are used for connecting to attachments; multiple second through holes are provided for easy connection of different attachments. The horizontal portion has three third through holes, which mate with the first and third through holes for connection with the clamping plate bolts, locking the connecting ball between the cup holder and the clamping plate.

[0012] Preferably, the connecting seat includes a reinforcing rib between its horizontal and vertical portions. Since the connecting seat has an L-shaped structure, its strength is relatively poor; the use of reinforcing ribs increases the strength of the connecting seat and improves its reliability.

[0013] Preferably, the cup holder is welded to the upper part of the connecting seat, adopting a welded structure, which ensures reliable connection and low cost.

[0014] Preferably, the outer surfaces of the clamping plate and the connecting ball are arc-shaped, meaning the inner ring wall of the clamping plate is an arc-shaped surface that mates with the outer surface of the connecting ball. The inner ring surface of the clamping plate has a spherical surface that is identical to the connecting ball and is always in contact with it. The identical dimensions ensure that the connecting seat will not move arbitrarily in the vertical direction, and the overall structure can withstand a greater load in a more stable state.

[0015] Preferably, the ball seat and the connecting ball are welded together, and a connecting plate is connected to the lower part of the ball seat. The connecting plate is bolted to the traction rod. An integral structure is adopted, that is, the ball seat and the connecting ball are a single unit, resulting in a more reliable and stable connection.

[0016] Preferably, the card plate has a two-piece split structure. That is, the card plate is cut into two pieces along the diameter of the center, which facilitates the installation of the one-piece ball seat. The card plate is divided into two symmetrical pieces for easy installation.

[0017] Preferably, a spherical bushing is provided between the connecting ball and the cup seat. To solve the problem of wear and tear on the ball connection device after long-term use, a spherical bushing is added between the connecting ball and the connecting seat.

[0018] Preferably, the connecting plate and the ball seat are welded together. A fixing bolt is provided below the ball seat. The traction rod is provided with a fourth through hole and a fifth through hole. The fixing bolt passes through the fifth through hole to connect the ball seat and the traction rod. The traction rod is bolted to the connecting plate through the fourth through hole. The connecting plate adopts a long strip structure, which has a large contact surface with the traction rod and makes the connection more stable.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This invention locks the connecting ball between the connecting seat and the card plate, allowing the connecting rod and the connecting seat to rotate freely in 3D space without falling off.

[0021] The card plate has a spherical surface that is the same as the connecting ball and can always be in contact with the connecting ball. The same size ensures that the connecting seat will not move randomly in the vertical direction, and the overall structure can withstand a greater load in a more stable state.

[0022] The detachable sphere facilitates maintenance, and the integrated welding process significantly reduces costs and production cycles. Attached Figure Description

[0023] Figure 1 This is an exploded view of the installation of a spherical hook connecting device according to this utility model.

[0024] Figure 2 This is an installation structure diagram of a spherical hook connecting device according to the present invention.

[0025] Figure 3 This is an exploded view of the installation of Embodiment 2 of this utility model.

[0026] Figure 4 This is an installation structure diagram of Embodiment 2 of this utility model.

[0027] In the diagram: 1-Connecting seat, 101-Horizontal part, 102-Vertical part, 103-Second through hole, 104-Third through hole, 105-Reinforcing rib, 2-Cup seat, 3-Connecting ball, 301-Oil groove, 4-Clamping plate, 401-First through hole, 5-Ball seat, 501-Fixing bolt, 6-Traction rod, 601-Fourth through hole, 602-Fifth through hole, 7-Connecting plate, 8-Spherical bushing, 9-Attachment, 10-Tractor. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0029] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "front", "back", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or structure referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Example 1:

[0031] like Figure 1 and Figure 2 As shown, a spherical hook connection device includes: a connecting seat 1, which is connected to an attachment 9; a cup seat 2, which is disposed on the upper part of the connecting seat 1 with its opening facing downward; a connecting ball 3, the upper part of which mates with the inner cavity of the cup seat 2, and the surface of the connecting ball 3 is provided with a plurality of oil grooves 301; a clamping plate 4, which is constructed in a ring structure, the middle part of which mates with the lower part of the connecting ball 3, and the upper edge of the clamping plate 4 is provided with a first through hole 401, through which the clamping plate 4 is fixedly connected to the connecting seat 1; a ball seat 5, the upper part of which is connected to the internal threaded hole of the connecting ball 3; and a traction rod 6, one end of which is fixedly connected to the lower part of the ball seat 5 and the other end of which is connected to a tractor 10.

[0032] like Figure 1 As shown, in this embodiment, the connector and the connector base 1 are separate structures, while the card plate 4 is an integral structure.

[0033] The diameter of the connecting ball 3 is set according to the traction capacity of the tractor 10, and the inner spherical surface of the cup seat 2 matches the outer spherical surface of the connecting ball 3.

[0034] The connecting ball 3 is connected to the traction rod 6 through a split assembly, which has the advantage of making it easy to replace the worn connecting ball 3.

[0035] like Figure 1 and Figure 2 As shown, the installation method of this embodiment is as follows: First, the clamping plate 4 needs to be placed between the traction rod 6 and the connecting ball 3. Then, the connecting ball 3 is placed into the cup seat 2 so that the outer spherical surface of the connecting ball 3 matches the inner spherical surface of the cup seat 2. Then, the clamping plate 4 and the connecting seat 1 are fixedly connected by bolts through the first through hole 401. The connecting ball 3 is locked between the cup seat 2 and the clamping plate 4, so that the traction rod 6 and the connecting seat 1 can rotate arbitrarily in 3D space without falling off.

[0036] Example 2: A spherical hook connection device.

[0037] like Figures 3-4 As shown, a spherical hook connection device includes: a connecting seat 1, which is connected to an attachment 9; and a cup seat 2, which is disposed on the upper part of the connecting seat 1 with its opening facing downward. The top of the cup seat 2 is provided with an oil cup, which is used to hold lubricating oil.

[0038] A connecting ball 3 is provided, the upper part of which fits into the inner cavity of the cup holder 2. Several oil grooves 301 are provided on the surface of the connecting ball 3. The oil grooves 301 can be annular oil grooves. The planes of the oil grooves 301 are horizontally arranged, and the planes of the multiple oil grooves 301 are parallel to each other. The oil grooves 301 are used to hold butter.

[0039] The card plate 4 is a ring structure. The middle part of the card plate 4 and the lower part of the connecting ball 3 are engaged. The card plate 4 is located in the lower half of the connecting ball 3. The upper edge of the card plate 4 is provided with a first through hole 401. The card plate 4 is fixedly connected to the connecting seat 1 through the first through hole 401. There are 3 first through holes 401. The third through hole 104 is connected to the first through hole 401. The three components, card plate 4, connecting ball 3 and connecting seat 1, are fixed together through the first through holes 401, and the connecting ball 3 is locked between the cup seat 2 and the card plate 4.

[0040] A ball seat 5 is connected to the internal threaded hole of the connecting ball 3 at its upper part; a drawbar 6 is fixedly connected at one end to the lower part of the ball seat 5 and at the other end to the tractor 10. The attachment 9 is connected to the tractor 10 by fixing one end of the drawbar 6 to the body of the tractor 10.

[0041] like Figure 4As shown, in this embodiment, the diameter of the connecting ball 3 is 80-150mm. The upper part of the cup holder 2 is a hemispherical inner spherical cavity, and the lower part of the cup holder 2 is an inner cylindrical section connecting the inner spherical cavity. The length of the inner cylindrical section is d≥15mm. The inner spherical surface of the cup holder 2 matches the outer spherical surface of the connecting ball 3. The cup holder 2 has an inner cylindrical section d≥15mm from the center of the inner spherical surface, which has a guiding function to facilitate the insertion of the connecting ball 3 into the connecting seat 1, while ensuring that the connecting ball 3 will not fall off during the connection process with the connecting seat 1.

[0042] In this embodiment, the connecting seat 1 is L-shaped, and the connection includes a horizontal part 101 and a vertical part 102. The vertical part 102 is provided with two rows of second through holes 103, and the horizontal part 101 is provided with third through holes 104. The L-shaped structure provides a larger inner space, resulting in high space utilization and a compact structure. The second through holes 103 are used to connect with attachments 9, and multiple second through holes 103 are provided to facilitate the connection of different attachments 9. The horizontal part 101 is provided with three third through holes 104, which are used to bolt to the clamping plate 4, locking the connecting ball 3 between the cup seat 2 and the clamping plate 4.

[0043] In this embodiment, the connecting seat 1 includes a reinforcing rib 105 disposed between the horizontal part 101 and the vertical part 102.

[0044] In this embodiment, the cup holder 2 is welded to the upper part of the connecting seat 1.

[0045] In this embodiment, the outer surfaces of the clamping plate 4 and the connecting ball 3 are arc-shaped, meaning that the inner ring wall of the clamping plate 4 is constructed to fit the arc surface of the connecting ball. The inner ring surface of the clamping plate 4 has a spherical surface that is identical to that of the connecting ball 3 and is always in contact with the connecting ball 3.

[0046] In this embodiment, to achieve a more reliable and stable connection, the connecting ball 3 adopts an integrated structure, while the clamping plate 4 is a separate structure. The connecting ball 3 is assembled and connected to the traction rod 6 through an integral welding process, as detailed below:

[0047] The ball seat 5 and the connecting ball 3 are welded together. A connecting plate 7 is connected to the lower part of the ball seat 5. The connecting plate 7 and the traction rod 6 are bolted together.

[0048] The clamping plate 4 is a two-piece split structure. That is, the clamping plate 4 is cut into two pieces along the diameter of the center, which facilitates the installation of the integrated ball seat 5. The clamping plate 4 is divided into two symmetrical pieces for easy installation.

[0049] A spherical bushing 8 is provided between the connecting ball 3 and the cup seat 2. To solve the problem of wear and tear on the ball connection device after long-term use, a spherical bushing 8 is added between the connecting ball 3 and the connecting seat 1.

[0050] The connecting plate 7 and the ball seat 5 are welded together. A fixing bolt 501 is provided below the ball seat 5. The traction rod 6 is provided with a fourth through hole 601 and a fifth through hole 602. The fixing bolt 501 passes through the fifth through hole 602 to connect the ball seat 5 and the traction rod 6. The traction rod 6 is bolted to the connecting plate 7 through the fourth through hole 601.

[0051] The installation principle of this embodiment is as follows:

[0052] In this embodiment, a spherical bushing 8 is added between the connecting ball 3 and the connecting seat 1. The inner spherical surface of the bushing directly matches the spherical surface of the connecting ball 3, and the outer spherical surface of the bushing matches the inner spherical surface of the cup seat. The locking plate 4 is divided into two parts. By placing the connecting ball 3 into the cup seat 2, the outer spherical surface of the connecting ball 3 matches the inner spherical surface of the cup seat 2. The two locking plates 4 are then fixed to the connecting seat 1 with bolts to achieve the combination of the split locking plates 4. The connecting ball 3 and the spherical bushing 8 are locked between the cup seat 2 and the locking plate 4, allowing the connecting rod and the connecting seat 1 to rotate arbitrarily in 3D space without falling off.

[0053] The card plate 4 has a spherical surface that is the same as the connecting ball 3 and can always be in contact with the connecting ball 3. The same size ensures that the connecting seat 1 will not move randomly in the vertical direction, and the overall structure can withstand a greater load in a more stable state.

Claims

1. A spherical hook connection device, characterized by: Connecting seat (1), which is connected to attachment (9); Cup seat (2), which is located on the upper part of the connecting seat (1) and has its opening facing downward; Connecting ball (3), which is fitted with the inner cavity of the cup seat (2) and has several oil grooves (301) on its surface; Clamping plate (4), which is constructed as a ring structure and is fitted with the lower part of the connecting ball (3) in the middle and has a first through hole (401) on its upper edge and is fixedly connected to the connecting seat (1) through the first through hole (401); Ball seat (5), which is connected to the internal thread hole of the connecting ball (3) in the upper part; Traction rod (6), which is fixedly connected to the lower part of the ball seat (5) at one end and connected to the tractor (10) at the other end.

2. A spherical hook connection device according to claim 1, characterized in that: The diameter of the connecting ball (3) is 80-150mm. The upper part of the cup holder (2) is a hemispherical inner spherical cavity, and the lower part of the cup holder (2) is an inner cylindrical section connecting the inner spherical cavity. The length of the inner cylindrical section is ≥15mm.

3. A spherical hook connection device according to claim 1, characterized in that: The connector (1) is L-shaped. The connector includes a horizontal part (101) and a vertical part (102). The vertical part (102) is provided with two rows of second through holes (103), and the horizontal part (101) is provided with a third through hole (104).

4. A spherical hook connection device according to claim 1, characterized in that: The connection includes a reinforcing rib (105) provided between the horizontal part (101) and the vertical part (102).

5. A spherical hook connection device according to claim 1, characterized in that: The cup holder (2) is welded to the upper part of the connecting seat (1).

6. A spherical hook connection device according to claim 1, characterized in that: The outer surfaces of the card plate (4) and the connecting ball (3) are arc surfaces.

7. A spherical hook connection device according to claim 1, characterized in that: The ball seat (5) and the connecting ball (3) are welded together. A connecting plate (7) is connected to the lower part of the ball seat (5). The connecting plate (7) and the traction rod (6) are bolted together.

8. A spherical hook connecting device according to claim 7, characterized in that: The card plate (4) is a two-piece split structure.

9. A spherical hook connection device according to claim 7, characterized in that: A spherical bushing (8) is provided between the connecting ball (3) and the cup seat (2).

10. A spherical hook connection device according to claim 7, characterized in that: The connecting plate (7) and the ball seat (5) are welded together. A fixing bolt (501) is provided below the ball seat (5). A fourth through hole (601) and a fifth through hole (602) are provided on the traction rod (6). The fixing bolt (501) passes through the fifth through hole (602) to connect the ball seat (5) and the traction rod (6). The traction rod (6) is bolted to the connecting plate (7) through the fourth through hole (601).

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