Tow ball carrier connector

Abstract

The present invention relates to the technical field of vehicle rear tow balls, and discloses a tow ball carrier connector, which aims to solve the problem that existing tow balls are prone to jamming during disconnection. The operating handle comprises a handle rod, an unlocking handle, an unlocking connecting plate, an anti-theft lock, an anti-loosening push rod, and a pressing head. The anti-theft lock is mounted inside the front end of the handle rod, the unlocking connecting plate is mounted at the rear end of the anti-theft lock, and the unlocking handle is mounted at the rear end of the unlocking connecting plate. A limiting torsion spring is provided at the connection between the unlocking handle and the unlocking connecting plate. The anti-loosening push rod is mounted at the front end of the anti-theft lock, and a locking compression spring is provided on the outer wall of the anti-loosening push rod. The pressing head is arranged on two sides of the front end of the handle rod.

Description

Trailer ball bearing connector Technical Field

[0001] This invention relates to the field of automotive rear trailer ball technology, specifically a trailer ball support device connector. Background Technology

[0002] As a crucial component connecting the vehicle's surrounding load-bearing devices, the trailer ball at the rear of a car is increasingly valued for its functions and uses as the objects it carries become more diverse. As a relatively standardized component, the trailer ball's functionality can only be further enhanced by continuously innovating and developing the connector between the load-bearing device and the trailer ball, thus meeting the diverse needs of people using it to tow or carry goods.

[0003] Due to the convenience of using trailer balls to carry goods, this external loading method is becoming increasingly popular. Currently, trailer ball sizes are not entirely standardized. Furthermore, due to the manufacturing process of the trailer ball head and mechanical wear, trailer ball connectors need a large adjustment range and easy adjustment to conveniently clamp and connect trailer balls of different sizes. Most existing trailer ball loading device connectors achieve this clamping connection by fully enclosing the trailer ball head and relying on the connector housing to press against it from the side.

[0004] However, existing trailer ball bearings are prone to jamming when disconnecting. To address this, we provide a trailer ball bearing device connector. Summary of the Invention

[0005] The purpose of this invention is to provide a trailer ball bearing device connector to solve the problem mentioned in the background art that existing trailer balls are prone to jamming when disconnected.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a trailer ball bearing device connector, comprising an operating handle, a housing, and a lifting and clamping device, wherein the operating handle is installed at the rear end of the housing, and the lifting and clamping device is installed at the lower end of the housing;

[0007] The operating handle includes a handle rod, an unlocking handle, an unlocking connecting piece, an anti-theft lock, an anti-loosening push rod, and a pressure rod head. The anti-theft lock is installed inside the front end of the handle rod, the unlocking connecting piece is installed at the rear end of the anti-theft lock, the unlocking handle is installed at the rear end of the unlocking connecting piece, a limit torsion spring is provided at the connection between the unlocking handle and the unlocking connecting piece, the anti-loosening push rod is installed at the front end of the anti-theft lock, a locking compression spring is provided on the outer wall of the anti-loosening push rod, and the pressure rod head is located on both sides of the front end of the handle rod.

[0008] The outer shell is equipped with a clamping adjustment support, which is fixedly connected to the outer shell. The side wall of the outer shell is provided with a U-shaped opening.

[0009] The lifting and pressing device includes a lifting and pressing basket and connecting rods. There are two connecting rods, and the two connecting rods are respectively installed on both sides of the upper end of the lifting and pressing basket.

[0010] Preferably, a boss is provided on the outer wall of the front end of the pressure rod head, a first pin hole is provided inside the boss, a second pin hole is provided at the lower end of the first pin hole, a guide groove is provided at the rear end of the first pin hole, and the pressure rod head is connected to the outer shell through the second pin hole and the pin shaft.

[0011] Preferably, the front end of the anti-loosening push rod is provided with a variable diameter round rod, and the rear end of the anti-loosening push rod is provided with a locking hole.

[0012] Preferably, the clamping adjustment support has a stroke adjustment block installed inside, an adjustment knob installed at the rear end of the stroke adjustment block, and a tubular ball seat provided at the lower end of the clamping adjustment support.

[0013] Preferably, limit lugs are provided on both sides of the rear end of the clamping adjustment support.

[0014] Preferably, the clamping adjustment support is provided with limit holes on both sides, and a push rod shaft is installed between the limit holes on both sides.

[0015] Preferably, the upper end of the connecting rod is provided with a round hole, and the connecting rod is connected to the first pin hole on the pressure rod head through the round hole and the pin shaft.

[0016] Preferably, the upper end of the connecting rod has a concave platform around the circular hole, and the concave platform on the connecting rod is engaged with the protrusion on the outer wall of the front end of the pressure rod head.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention designs a connector with a simple structure that allows for easy adjustment of the clamping stroke to match trailer balls of different sizes. This solves the problem of inconvenient stroke adjustment. Furthermore, when adjusting the stroke, the weight of the connector and the load-bearing device connected to the connector is supported by the clamping adjustment support, which does not create resistance to the stroke adjustment. This avoids the problem of jamming and difficulty in releasing the trailer ball that may occur with the clamping method where the outer shell squeezes the clamping claws to hold the trailer ball head from the side. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic diagram of the cross-section structure of the present invention;

[0021] Figure 3 is a schematic diagram of the internal structure of the outer shell of the present invention;

[0022] Figure 4 is a partial structural diagram of the pressure bar head of the present invention;

[0023] Figure 5 is a partial structural schematic diagram of the anti-loosening push rod of the present invention;

[0024] Figure 6 is a schematic diagram of the clamping adjustment support structure of the present invention;

[0025] Figure 7 is a schematic diagram of the push rod shaft structure of the present invention;

[0026] Figure 8 is a schematic diagram of the connection structure between the outer shell and the lifting and pressing device of the present invention;

[0027] Figure 9 is a schematic diagram of the lifting and pressing device of this utility model in the pressing state.

[0028] Figure 10 is a schematic diagram of the lifting and pressing device of this utility model in the released state.

[0029] In the diagram: 1. Operating handle; 101. Handle rod; 102. Unlocking handle; 103. Limiting torsion spring; 104. Unlocking connecting piece; 105. Locking spring; 106. Anti-loosening push rod; 107. Anti-theft lock; 108. Pressure rod head; 109. Boss; 110. First pin hole; 111. Second pin hole; 112. Guide groove; 113. Variable diameter round rod; 114. Lock hole; 2. Outer shell; 201. Pressing adjustment support; 202. Push rod shaft; 203. Stroke adjustment block; 204. Adjustment knob; 205. Limiting stop ear; 206. Limiting waist hole; 207. Tubular ball seat; 3. Lifting and pressing device; 301. Lifting and pressing basket; 302. Connecting rod. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Please refer to Figures 1-10. One embodiment of the present invention is a trailer ball bearing device connector, which includes an operating handle 1, a housing 2, and a lifting and pressing device 3. The operating handle 1 is installed at the rear end of the housing 2, and the lifting and pressing device 3 is installed at the lower end of the housing 2.

[0032] The operating handle 1 includes a handle rod 101, an unlocking handle 102, an unlocking connecting piece 104, an anti-theft lock 107, an anti-loosening push rod 106, and a pressure rod head 108. The anti-theft lock 107 is installed inside the front end of the handle rod 101, the unlocking connecting piece 104 is installed at the rear end of the anti-theft lock 107, the unlocking handle 102 is installed at the rear end of the unlocking connecting piece 104, a limit torsion spring 103 is provided at the connection between the unlocking handle 102 and the unlocking connecting piece 104, the anti-loosening push rod 106 is installed at the front end of the anti-theft lock 107, a locking pressure spring 105 is provided on the outer wall of the anti-loosening push rod 106, and the pressure rod head 108 is located on both sides of the front end of the handle rod 101.

[0033] The outer casing 2 is equipped with a clamping adjustment support 201, and the clamping adjustment support 201 is fixedly connected to the outer casing 2. The side wall of the outer casing 2 is provided with a U-shaped opening.

[0034] The lifting and pressing device 3 includes a lifting and pressing basket 301 and a connecting rod 302. There are two connecting rods 302, and the two connecting rods 302 are respectively installed on both sides of the upper end of the lifting and pressing basket 301.

[0035] Furthermore, a boss 109 is provided on the outer wall of the front end of the pressure rod head 108. A first pin hole 110 is provided inside the boss 109. A second pin hole 111 is provided at the lower end of the first pin hole 110. A guide groove 112 is provided at the rear end of the first pin hole 110. The pressure rod head 108 is connected to the outer shell 2 through the second pin hole 111 and the pin shaft. The pressure rod head 108 is an L-shaped metal part with two pin holes at the front end, which are used to connect the outer shell 2 and the lifting and pressing device 3, respectively.

[0036] Furthermore, the front end of the anti-loosening push rod 106 is provided with a variable diameter round rod 113, and the rear end of the anti-loosening push rod 106 is provided with a lock hole 114. The push rod body of the anti-loosening push rod 106 is a section of variable diameter round rod 113, with a metal piece with a lock hole 114 welded in the middle. The middle part of the push rod body has a larger diameter, which can prevent the push rod from twisting left and right and improve stability. The position of the lock hole 114 on the metal piece welded in the middle matches the position of the anti-theft lock 107 on the handle rod 101. After being pushed by the locking spring 105, the anti-loosening push rod 106 enters the slot on the connecting rod 302 and can be locked. With the anti-theft lock 107, the anti-theft function can be realized.

[0037] Furthermore, a stroke adjustment block 203 is installed inside the clamping adjustment support 201, and an adjustment knob 204 is installed at the rear end of the stroke adjustment block 203. A tubular ball seat 207 is provided at the lower end of the clamping adjustment support 201. The clamping adjustment support 201 adopts a structure in which the clamping ball head and stroke adjustment are integrated. The tubular ball seat 207 at the lower part of the clamping adjustment support 201 is used to clamp the top of the trailer ball head to achieve locking.

[0038] Furthermore, limit ears 205 are provided on both sides of the rear end of the clamping adjustment support 201, and the side is provided with extended limit ears 205 to prevent the operating handle 1 from being pressed down excessively.

[0039] Furthermore, the clamping adjustment support 201 is provided with limit waist holes 206 on both sides, and a push rod shaft 202 is installed between the limit waist holes 206 on both sides. The clamping adjustment support 201 is provided with limit waist holes 206 perpendicular to the top plane, which are used to adjust the relative position of the operating handle 1 and the outer shell 2.

[0040] Furthermore, the upper end of the connecting rod 302 is provided with a round hole, and the connecting rod 302 is connected to the first pin hole 110 on the pressure rod head 108 through the round hole and the pin shaft. When the operating handle 1 is pressed down, it can drive the entire lifting and pressing device 3 to drive, thereby pressing the trailer ball from bottom to top into the tubular ball seat 207 at the lower part of the pressing adjustment support 201.

[0041] Furthermore, a concave platform is provided around the circular hole at the upper end of the connecting rod 302, and the concave platform on the connecting rod 302 is connected to the boss 109 on the outer wall of the front end of the pressure rod head 108. The side of the pressure rod head 108 has a boss 109, which is engaged with the concave platform of the connecting rod 302 in the lifting and pressing device 3, which can prevent the trailer ball from failing to lock due to excessive pressing of the operating handle 1.

[0042] Working principle: Rotate the operating handle 1 to lock the key to the unlock position, and simultaneously lift the operating handle 1 while gripping the unlock handle. At this time, the clamping base in the lifting clamping device 3 descends, allowing the U-shaped inlet hole on the side of the outer shell 2 to be unobstructed and enabling the trailer ball head to pass through. Align the U-shaped inlet hole on the side of the connector with the trailer ball head, move the connector forward to allow the trailer ball to enter the connector, and move the connector down to transfer the weight of the connector from the operator's arm to the trailer ball. Under the action of gravity and the limiting effect of the side wall of the outer shell 2, the trailer ball head automatically slides into the ball seat in the upper part of the inner cavity of the outer shell 2. Press down the operating handle 1, and the connection... Rod 302 drives the lifting and clamping device 3 to fix the trailer ball in the ball seat. If the operating handle 1 cannot be pressed down to the limit structure, or if the clamping force is insufficient after pressing down, lift the operating handle 1 again, then rotate the adjusting knob 204 to the appropriate position, press the operating handle 1 down to the limit structure again, press and rotate the locking key to the locked position to lock the anti-theft lock 107, remove the key, and after use, rotate the operating handle 1 to the unlock position, grip the unlock handle and lift the operating handle 1 at the same time. At this time, the lifting and clamping base descends, and the U-shaped ball hole on the side of the outer shell 2 is unobstructed, so the connector can be removed.

[0043] In Figures 9 and 10, point O is the projection of the rotation axis of the operating handle 1. a and a' are the connecting axes between the upper circular hole of the pressure rod head 108 and the upper circular hole of the connecting rod 302. b and b' are the center of the tubular ball seat 207. When the operating handle 1 is pressed down, the connector is in a clamped state, and the distance between the pressure rod head 108 and the center of the tubular ball seat 207 is ab = ao + bo. When the operating handle 1 is lifted up, the connector is in a released state, and the distance between the upper circular hole of the pressure rod head 108 and the center of the tubular ball seat 207 is a'. b', because ao=a'o is a constant and bo=b'o is a constant, therefore ab>a'b', meaning that in the clamping state, the distance between the pressure rod head 108 on the operating handle 1 and the lower tubular ball seat 207 of the clamping adjustment support 201 is greater. Under the drive of the pin shaft, the lifting clamping device 3 will rise to achieve clamping of the trailer ball. By adjusting the distance ob between the projection point O of the rotation axis of the operating handle 1 and the center b of the tubular ball seat, the distance between the lifting clamping basket 301 and the clamping adjustment support 201 in the clamping state can be adjusted. To achieve the appropriate clamping of trailer balls of different sizes, the distance ob between the projection point O of the rotation axis of the operating handle 1 and the center b of the tubular ball seat 207 can be adjusted in this invention by the following structure: rotating the adjustment knob 204, the stroke adjustment block 203 moves back and forth under the drive of the screw at the front end of the adjustment knob 204, pushing the push rod shaft 202 to deflect at an angle, and then pushing the rotation center of the operating handle 1 to move up and down along the waist hole, thereby adjusting the distance ob between the projection point O of the rotation axis of the operating handle 1 and the center b of the tubular ball seat 207. When the projection point O of the rotation axis of the operating handle 1 is in the high limit position, the pressing adjustment support limit stop ear 205 presses the tail structure feature of the adjusting support, which is used to increase the contact area between the push rod shaft 202 and the waist hole, improve the structural strength, and prevent the push rod shaft 202 from embedding into the side wall of the waist hole when bearing load, affecting the adjustment. While adjusting the stroke by changing the angle between the eccentric shaft and the pressing adjustment support limit stop ear 205, the eccentric shaft is strengthened, and the rigidity and stability are better.

[0044] This connector can change the direction of the outer shell and the direction of the trailer ball entering the hole on the lifting clamping basket as needed, so as to meet the needs of the trailer ball head entering in different directions. Furthermore, replacing the tubular ball seat at the bottom of the clamping adjustment support with a ball seat sleeve with a threaded pair can further increase the adjustment stroke.

[0045] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A trailer ball bearing device connector, comprising an operating handle (1), a housing (2) and a lifting and clamping device (3), wherein the operating handle (1) is installed at the rear end of the housing (2) and the lifting and clamping device (3) is installed at the lower end of the housing (2); Its features are: The operating handle (1) includes a handle rod (101), an unlocking handle (102), an unlocking connecting piece (104), an anti-theft lock (107), an anti-loosening push rod (106), and a pressure rod head (108). The anti-theft lock (107) is installed inside the front end of the handle rod (101). The unlocking connecting piece (104) is installed at the rear end of the anti-theft lock (107). The unlocking handle (102) is installed at the rear end of the unlocking connecting piece (104). A limit torsion spring (103) is provided at the connection between the unlocking handle (102) and the unlocking connecting piece (104). The anti-loosening push rod (106) is installed at the front end of the anti-theft lock (107). A locking pressure spring (105) is provided on the outer wall of the anti-loosening push rod (106). The pressure rod head (108) is located on both sides of the front end of the handle rod (101). The outer shell (2) is equipped with a clamping adjustment support (201) inside, and the clamping adjustment support (201) is fixedly connected to the outer shell (2). The side wall of the outer shell (2) is provided with a U-shaped opening. The lifting and pressing device (3) includes a lifting and pressing basket (301) and a connecting rod (302). There are two connecting rods (302), and the two connecting rods (302) are respectively installed on both sides of the upper end of the lifting and pressing basket (301).

2. The trailer ball bearing device connector according to claim 1, characterized in that: A boss (109) is provided on the outer wall of the front end of the pressure rod head (108). A first pin hole (110) is provided inside the boss (109). A second pin hole (111) is provided at the lower end of the first pin hole (110). A guide groove (112) is provided at the rear end of the first pin hole (110). The pressure rod head (108) is connected to the outer shell (2) through the second pin hole (111) and the pin shaft.

3. The trailer ball bearing device connector according to claim 2, characterized in that: The front end of the anti-loosening push rod (106) is provided with a variable diameter round rod (113), and the rear end of the anti-loosening push rod (106) is provided with a locking hole (114).

4. The trailer ball bearing device connector according to claim 3, characterized in that: The clamping adjustment support (201) is equipped with a stroke adjustment block (203) inside, and an adjustment knob (204) is installed at the rear end of the stroke adjustment block (203). A tubular ball seat (207) is provided at the lower end of the clamping adjustment support (201).

5. The trailer ball bearing device connector according to claim 4, characterized in that: Limiting lugs (205) are provided on both sides of the rear end of the clamping adjustment support (201).

6. The trailer ball bearing device connector according to claim 5, characterized in that: The clamping adjustment support (201) is provided with limit waist holes (206) on both sides, and a push rod shaft (202) is installed between the limit waist holes (206) on both sides.

7. The trailer ball bearing device connector according to claim 6, characterized in that: The upper end of the connecting rod (302) is provided with a round hole, and the connecting rod (302) is connected to the first pin hole (110) on the pressure rod head (108) through the round hole and the pin.

8. The trailer ball bearing device connector according to claim 7, characterized in that: The upper end of the connecting rod (302) has a concave platform around the circular hole, and the concave platform on the connecting rod (302) is connected to the protrusion (109) on the outer wall of the front end of the pressure rod head (108).

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