Hitch ball bearing device connector

Abstract

The invention discloses a trailer ball bearing device connector, relates to the technical field of trailer balls at the tail of an automobile, and aims to solve the problem that an existing trailer ball is easy to be clamped when being disconnected. The operating handle comprises a handle rod, an unlocking handle, an unlocking connecting piece, an anti-theft lock, an anti-loosening push rod and a pressing rod head, the anti-theft lock is installed in 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, and the anti-loosening push rod is installed at the rear end of the anti-theft lock. A limiting torsional spring is arranged at the connecting position of 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 arranged on the outer wall of the anti-loosening push rod, and the compression rod heads are arranged on the two sides of the front end of the handle rod.

Description

Technical Field

[0001] The invention relates to the technical field of a trailer ball at the rear of an automobile, in particular to a trailer ball bearing device connector. Background Art

[0002] As an important component for connecting the surrounding load-bearing devices of the car, the trailer ball at the rear of the car has become more and more popular with the diversification of the demand for the objects being carried. As a relatively standardized component, the trailer ball at the rear of the car can only be better developed by continuously innovating and developing the connector between the load-bearing device and the trailer ball to meet people's diverse needs for towing or carrying items with the trailer ball; Due to the convenience of carrying items through a trailer ball, this external loading method is becoming more and more popular. At present, the size specifications of trailer balls are not completely unified. At the same time, due to the processing method of the trailer ball head and mechanical wear, the trailer ball connector needs to have a large adjustment stroke and be easy to adjust, so as to conveniently realize the clamping connection of trailer balls of different specifications. Most of the existing trailer ball load-bearing device connectors fully wrap the trailer ball head and rely on the connector shell to squeeze from the side to achieve the clamping connection of the trailer ball. However, the existing trailer ball has the problem of easy jamming when releasing the connection. For this reason, we provide a trailer ball load-bearing device connector. Summary of the invention

[0003] The object of the present invention is to provide a trailer ball bearing device connector to solve the problem that the existing trailer ball mentioned in the background art is prone to get stuck when the connection is released.

[0004] To achieve the above object, the present invention provides the following technical solution: a trailer ball load-bearing device connector, comprising an operating handle, an outer shell and a lifting and clamping device, wherein the operating handle is mounted on the rear end of the outer shell, and the lifting and clamping device is mounted on the lower end of the outer shell; The operating handle includes a handle bar, 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 bar, 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 limited torsion spring is arranged 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 arranged on the outer wall of the anti-loosening push rod, and the pressure rod head is arranged on both sides of the front end of the handle bar; A compression adjustment support is installed inside the outer shell, and the compression adjustment support is fixedly connected to the outer shell, and a U-shaped hole is provided on the side wall of the outer shell; The lifting and pressing device comprises a lifting and pressing basket and a connecting rod. Two connecting rods are provided and the two connecting rods are respectively installed on both sides of the upper end of the lifting and pressing basket.

[0005] Preferably, a boss is provided on the outer wall at 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.

[0006] Preferably, a reducing round rod is provided at the front end of the anti-loosening push rod, and a locking hole is provided inside the rear end of the anti-loosening push rod.

[0007] Preferably, a stroke adjustment block is installed inside the compression adjustment support, an adjustment knob is installed at the rear end of the stroke adjustment block, and a tubular ball seat is provided at the lower end of the compression adjustment support.

[0008] Preferably, limit stop ears are provided on both sides of the rear end of the compression adjustment support.

[0009] Preferably, both sides of the clamping and adjusting support are provided with limiting waist holes, and a push rod shaft is installed between the limiting waist holes on both sides.

[0010] Preferably, a circular hole is provided at the upper end of the connecting rod, and the connecting rod is connected to the first pin hole on the pressure rod head through the circular hole and the pin shaft.

[0011] Preferably, a concave surface is provided around the circular hole at the upper end of the connecting rod, and the concave surface on the connecting rod is cooperatively connected with the convex surface on the outer wall of the front end of the pressure rod head.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention designs a connector with a simple structure and conveniently adjustable clamping stroke to match trailer balls of different sizes, thereby solving the problem of inconvenient stroke adjustment. When adjusting the stroke, the weight of the connector and the load-bearing device connected to the connector is borne by the clamping adjustment support, and no resistance is generated to the stroke adjustment. This avoids the problem of the trailer ball being stuck and difficult to release due to the clamping method in which the clamping claws are squeezed by the outer shell to clamp the trailer ball head from the side. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the planed surface structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of the outer shell of the present invention; Figure 4 It is a schematic diagram of the local structure of the pressure rod head of the present invention; Figure 5 It is a schematic diagram of the local structure of the anti-loosening push rod of the present invention; Figure 6 It is a schematic diagram of the structure of the compression adjustment support of the present invention; Figure 7 It is a schematic diagram of the push rod shaft structure of the present invention; Figure 8 It is a schematic diagram of the connection structure between the outer shell and the lifting and pressing device of the present invention; Fig. 9 It is a schematic structural diagram of the lifting and clamping device of the present invention in a clamping state; Fig.10 It is a schematic structural diagram of the lifting and clamping device of the present invention in a released state; In the figure: 1. operating handle; 101. handle bar; 102. unlocking handle; 103. limit torsion spring; 104. unlocking connecting piece; 105. locking compression 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. reducing round rod; 114. locking hole; 2. outer shell; 201. clamping adjustment support; 202. push rod shaft; 203. stroke adjustment block; 204. adjustment knob; 205. limit stop ear; 206. limit waist hole; 207. tubular ball seat; 3. lifting and clamping device; 301. lifting and clamping basket; 302. connecting rod. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0015] See also Figure 1-10 , an embodiment provided by the present invention: a trailer ball bearing device connector, comprising an operating handle 1, an outer shell 2 and a lifting and clamping device 3, wherein the operating handle 1 is mounted at the rear end of the outer shell 2, and the lifting and clamping device 3 is mounted at the lower end of the outer shell 2; The operating handle 1 includes a handle bar 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 bar 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 limited torsion spring 103 is arranged 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 compression spring 105 is arranged on the outer wall of the anti-loosening push rod 106, and the pressure rod head 108 is arranged on both sides of the front end of the handle bar 101; A compression adjustment support 201 is installed inside the outer shell 2, and the compression adjustment support 201 is fixedly connected to the outer shell 2, and a U-shaped hole is provided on the side wall of the outer shell 2; The lifting and pressing device 3 includes a lifting and pressing basket 301 and a connecting rod 302 . Two connecting rods 302 are provided, and the two connecting rods 302 are respectively installed on both sides of the upper end of the lifting and pressing basket 301 .

[0016] Furthermore, a boss 109 is provided on the outer wall at 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, and 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 respectively used to connect the outer shell 2 and the lifting and clamping device 3.

[0017] Furthermore, a reducing round rod 113 is provided at the front end of the anti-loosening push rod 106, and a locking hole 114 is provided inside the rear end of the anti-loosening push rod 106. The push rod body of the anti-loosening push rod 106 is a section of reducing round rod 113, and a metal sheet with a locking hole 114 is welded in the middle. The diameter of the middle part of the push rod body is larger, which can prevent the push rod from twisting left and right and improve stability. The position of the locking hole 114 on the metal sheet welded in the middle matches the position of the anti-theft lock 107 of the handle rod 101. The anti-loosening push rod 106 can be locked after entering the slot on the connecting rod 302 under the push of the locking compression spring 105, and the anti-theft function can be realized in conjunction with the anti-theft lock 107.

[0018] Furthermore, a stroke adjustment block 203 is installed inside the clamping adjustment support 201, 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, and a clamping adjustment support 201 structure in which a clamping ball head and stroke adjustment are integrated is adopted. A tubular ball seat 207 is provided at the lower part of the clamping adjustment support 201, which is used to clamp the top of the trailer ball head to achieve locking.

[0019] Furthermore, both sides of the rear end of the compression adjustment support 201 are provided with limit stop ears 205, and the side is provided with a protruding limit stop ear 205 to prevent the operating handle 1 from being over-pressed.

[0020] Furthermore, limiting waist holes 206 are provided on both sides of the clamping and adjusting support 201, and a push rod shaft 202 is installed between the limiting waist holes 206 on both sides. The clamping and adjusting support 201 is provided with a limiting waist hole 206 perpendicular to the top plane for adjusting the relative position of the operating handle 1 and the outer shell 2.

[0021] Furthermore, a circular hole is provided at the upper end of the connecting rod 302, and the connecting rod 302 is connected to the first pin hole 110 on the pressure rod head 108 through the circular hole and the pin shaft. When the operating handle 1 is pressed down, the entire lifting and clamping device 3 can be driven to transmit, and then the trailer ball is pressed from bottom to top in the tubular ball seat 207 at the lower part of the clamping adjustment support 201.

[0022] Furthermore, a concave surface is provided around the circular hole at the upper end of the connecting rod 302, and the concave surface on the connecting rod 302 is matched and connected with 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, and the boss 109 cooperates with the concave surface of the connecting rod 302 in the lifting and clamping device 3, which can prevent the trailer ball lock from failing due to excessive downward pressure on the operating handle 1.

[0023] Working principle: rotate the operating handle 1 to lock the key to the unlocking position, hold the unlocking handle and lift the operating handle 1 at the same time. At this time, the clamping base in the lifting clamping device 3 drops, so that the U-shaped goal hole on the side of the outer shell 2 is not blocked, allowing the trailer ball head to pass through. Align the U-shaped goal hole on the side of the connector with the trailer ball head, move the connector forward, allow the trailer ball to enter the connector, move the connector downward, and transfer the weight of the connector from the operator's arm to the trailer ball. Under the action of gravity and the limitation of the side wall of the outer shell 2, the trailer ball head automatically slides into the ball seat at the upper part of the inner cavity of the outer shell 2, and press the operating handle 1 downward to connect the trailer ball. The 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 the clamping force is insufficient after being pressed down to the limit structure, lift the operating handle 1 again, then rotate the adjustment knob 204 to a suitable position, press the operating handle 1 down to the limit structure again, press and rotate the locking key to the locking position to lock the anti-theft lock 107, remove the key, and after use, rotate the operating handle 1 to unlock the key, hold the unlocking 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 not blocked, so the connector can be removed; Fig. 9 and Fig.10The middle point O is the projection of the rotation axis of the operating handle 1, a and a' are the connecting axes of 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 surface of the tubular ball seat 207. When the operating handle 1 is pressed down, the connector is in a tightened state. At this time, 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. At this time, 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'. ao=a'o is a constant, bo=b'o is a constant, so ab>a'b', that is, in the clamping state, the upper pressure rod head 108 of the operating handle 1 is farther away from the lower tubular ball seat 207 of the clamping adjustment support 201, and the lifting clamping device 3 is driven by the pin to rise to clamp 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 relative position between the lifting clamping basket 301 and the clamping adjustment support 201 in the clamping state can be adjusted. , thereby achieving adaptive clamping of trailer balls of different sizes, the adjustment of 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 achieved by the following structure in the present invention, rotating the adjustment knob 204, and the stroke adjustment block 203 moves forward and backward under the drive of the screw at the front end of the adjustment knob 204, pushing the push rod shaft 202 to deflect the angle, and then pushing the rotation center of the operating handle 1 to move up and down along the waist hole to achieve the adjustment of 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 upper limit position state, the clamping adjustment support limit stop ear 205 clamps the structural features of the tail of the adjustment 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 being embedded in 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 clamping adjustment support limit stop ear 205, the eccentric shaft is strengthened, and the rigidity and stability are better; The connector can change the direction of the trailer ball entry hole on the outer shell and the lifting clamping basket as needed, so as to meet the requirements of the trailer ball head entering in different directions, and the tubular ball seat at the bottom of the clamping adjustment support can be replaced with a ball seat sleeve with a threaded pair, which can further increase the adjustment stroke.

[0024] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A trailer ball bearing device connector, comprising an operating handle (1), an outer shell (2) and a lifting and clamping device (3), wherein the operating handle (1) is mounted at the rear end of the outer shell (2), and the lifting and clamping device (3) is mounted at the lower end of the outer shell (2); Features: The operating handle (1) comprises a handle bar (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 mounted inside the front end of the handle bar (101); the unlocking connecting piece (104) is mounted at the rear end of the anti-theft lock (107); the unlocking handle (102) is mounted at the rear end of the unlocking connecting piece (104); a limited 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 mounted at the front end of the anti-theft lock (107); a locking compression spring (105) is provided on the outer wall of the anti-loosening push rod (106); and the pressure rod head (108) is provided on both sides of the front end of the handle bar (101); A pressing and adjusting support (201) is installed inside the outer shell (2), and the pressing and adjusting support (201) is fixedly connected to the outer shell (2), and a U-shaped hole is provided on the side wall of the outer shell (2); The lifting and pressing device (3) comprises a lifting and pressing basket (301) and a connecting rod (302), two connecting rods (302) are provided, 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 load 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), and the pressure rod head (108) is connected to the outer shell (2) via the second pin hole (111) and the pin shaft.

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

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

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

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

7. The trailer ball carrier connector according to claim 6, characterized in that: A circular hole is provided at the upper end of the connecting rod (302), and the connecting rod (302) is connected to the first pin hole (110) on the pressure rod head (108) via the circular hole and the pin shaft.

8. The trailer ball load carrier connector according to claim 7, characterized in that: A concave table surface is arranged around the circular hole at the upper end of the connecting rod (302), and the concave table surface on the connecting rod (302) is matched and connected with the boss (109) on the outer wall of the front end of the pressure rod head (108).

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