Detachable spherical hook for gooseneck trailer

Abstract

The utility model relates to a detachable spherical hook for a gooseneck trailer, which belongs to the technical field of vehicle connecting pieces and comprises a cylindrical main body seat, a ball head is integrally arranged at the top end of the main body seat, a boss is integrally arranged between the ball head and the main body seat, and vertically through channels are arranged in the main body seat, the ball head and the boss. A channel is formed in the main body seat, a plunger matched with the channel in shape is arranged in the channel, a detachable movable handle is arranged at the top end of the plunger, the plunger sequentially comprises a slender round rod, a first cylindrical section and a second cylindrical section from top to bottom, the lower part of the second cylindrical section is conical, two through holes are formed in the cylindrical main body seat, and steel balls are arranged in the through holes. The plunger is simple in overall structure, switching operation between locking and unlocking is convenient and fast, no tool is needed, meanwhile, other resistance does not need to be overcome, the plunger is integrally machined instead of being in threaded connection, and the problem that locking or unlocking cannot be achieved due to thread looseness can be effectively solved.

Description

Technical Field

[0001] The utility model relates to a detachable spherical hook for a gooseneck trailer and belongs to the technical field of vehicle connecting parts. Background Art

[0002] Most of the existing gooseneck trailer hooks adopt the following two structural forms: one is that the adjustment part adopts a hexagonal head stud, which is installed in the inner cavity of the ball head body and connected to the plunger through a thread. By turning the stud with a hexagonal wrench, the rotation of the stud drives the plunger to move up and down, pushing the steel ball 30 to move, thereby realizing the locking and unlocking functions. The other is that the movable handle is connected to the thin round rod, and the thin round rod is connected to the plunger through a thread. There is a spring on the plunger. By lifting the handle to overcome the spring resistance, the plunger moves upward, releasing the steel ball, entering the unlocking state, and lowering the handle to push out the steel ball, entering the locking state.

[0003] The first structure: the unlocking and unlocking adjustments are too troublesome, and tools such as an Allen wrench need to be turned multiple times to fully move the plunger up and down to achieve the unlocking and unlocking states. The structure is complex and the manufacturing cost is high. The second structure: the plunger and the thin rod are connected by threads, and a spring is used to hold the plunger as a limit. When lifting, the spring force needs to be overcome. If the spring fails, the plunger and the thin rod are prone to loosening, and unhooking and other unexpected situations are prone to occur during the traction process.

[0004] Generally speaking, the existing gooseneck trailer hooks have the following shortcomings: the adjustment of unlocking and unlocking is too troublesome; the thin rod and the plunger are connected by threads, which are prone to loosening, leading to unexpected situations such as unhooking; 3. The product structure is complex and the manufacturing cost is high. Utility Model Content

[0005] The utility model aims to solve the technical problems in the prior art of complicated opening and closing operations, easy accidents and complex structures, and provides a detachable ball hook for a gooseneck trailer.

[0006] The utility model is realized through the following technical solutions:

[0007] That is, a detachable ball hook for a gooseneck trailer, comprising a cylindrical main body seat, a ball head is integrally provided at the top of the main body seat, a boss is integrally provided between the ball head and the main body seat, a vertically through-going channel is provided inside the main body seat, the ball head and the boss, a plunger with a shape suitable for the channel is provided in the channel, a detachable movable handle is provided at the top of the plunger, and the plunger is composed of a slender round rod, a first cylindrical section, and a second cylindrical section from top to bottom, and the lower part of the second cylindrical section is conical;

[0008] Two through holes are provided on the cylindrical main body seat, and steel balls are arranged in the through holes. When in the locked state, the second cylindrical section is located between the two steel balls. When in the unlocked state, the conical structure at the lower end of the second cylindrical section is located between the two steel balls.

[0009] The operator holds the movable handle and pulls the plunger up and down to lock and unlock the hook. When the plunger is pressed down, the conical structure at the bottom of the second cylindrical section squeezes the two steel balls. The two steel balls enter the through hole under the squeezing action, and the outer side of the steel balls is pressed against the body of the tractor to achieve locking. The plunger is pulled upward, and the upper end surface of the second cylindrical section is pressed against the step at the bottom of the channel to achieve unlocking. The utility model has a simple overall structure, and the switching operation between locking and unlocking is convenient and fast, without any tools, and also without overcoming other resistances. The plunger is processed as a whole, rather than threaded connection, which can effectively avoid the problem of being unable to lock or unlock due to loose threads.

[0010] Further preferably, a pin hole 1 is formed on the upper end of the plunger, a pin hole 2 is formed on the movable handle, and a split pin is used to penetrate the pin hole 1 and the pin hole 2 to connect the plunger and the movable handle. The split pin is used to connect the plunger and the movable handle, which is convenient for disassembly and assembly and has a simple structure.

[0011] Further preferably, a groove 1 for accommodating the movable handle is provided at the top of the ball head.

[0012] Further preferably, a groove 2 is provided on both sides of the groove 1. When unlocking is required, the operator's fingers facilitate lifting the plunger upwards with the help of the space in the groove 1.

[0013] Further preferably, in the locked state, the top of the movable handle is flush with the top of the ball head.

[0014] Further preferably, in the locked state, the first cylindrical section is located at the step at the lower part of the channel. During the unlocking operation, the first cylindrical section is prevented from being stuck by the step in the channel.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The operator holds the movable handle and pulls the plunger up and down to lock and unlock the hook. When the plunger is pressed down, the conical structure at the bottom of the second cylindrical section squeezes the two steel balls. The two steel balls enter the through hole under the squeezing action, and the outer side of the steel balls is pressed against the body of the tractor to achieve locking. The plunger is pulled upward, and the upper end surface of the second cylindrical section is pressed against the step at the bottom of the channel to achieve unlocking. The utility model has a simple overall structure, and the switching operation between locking and unlocking is convenient and fast, without any tools, and also without overcoming other resistances. The plunger is processed as a whole, rather than threaded connection, which can effectively avoid the problem of being unable to lock or unlock due to loose threads. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description 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.

[0018] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0019] Figure 2 It is a schematic diagram of the explosion structure of a specific implementation method of the utility model.

[0020] Figure 3 It is a schematic diagram of the cross-section structure (unlocked state) of a specific implementation method of the utility model.

[0021] Figure 4 It is a structural schematic diagram of the unlocked state of a specific implementation method of the utility model.

[0022] Figure 5 It is a structural schematic diagram of the locking state of a specific implementation method of the utility model.

[0023] In the figure: 1. main seat; 2. ball head; 3. boss; 4. groove 1; 5. movable handle; 6. cotter pin; 7. through hole; 8. steel ball; 9. slender round rod; 10. first cylindrical section; 11. second cylindrical section; 12. pin hole 1; 13. pin hole 2; 14. groove 2; 15. body. DETAILED DESCRIPTION

[0024] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0025] like Figures 1 to 5 A detachable ball hook for a gooseneck trailer shown in the figure comprises a cylindrical main body seat 1, a ball head 2 is integrally provided at the top of the main body seat 1, a boss 3 is integrally provided between the ball head 2 and the main body seat 1, a vertically through passage is provided inside the main body seat 1, the ball head 2, and the boss 3, a plunger having a shape suitable for the passage is provided in the passage, a detachable movable handle 5 is provided at the top of the plunger, and the plunger is composed of a slender round rod 9, a first cylindrical section 10, and a second cylindrical section 11 from top to bottom, and the lower part of the second cylindrical section 11 is conical;

[0026] Two through holes 7 are provided on the cylindrical main body seat 1, and steel balls 8 are arranged in the through holes 7. When in the locked state, the second cylindrical section 11 is located between the two steel balls 8. When in the unlocked state, the conical structure at the lower end of the second cylindrical section 11 is located between the two steel balls 8.

[0027] The operator holds the movable handle 5 and pulls the plunger up and down to lock and unlock the hook. When the plunger is pressed down, the conical structure at the bottom of the second cylindrical section 11 squeezes the two steel balls 8. The two steel balls 8 enter the through hole 7 under the squeezing action. The outer side of the steel balls 8 is pressed against the body 15 of the tractor to achieve locking. The plunger is pulled upward, and the upper end surface of the second cylindrical section 11 is pressed against the step at the bottom of the channel to achieve unlocking. The utility model has a simple overall structure, and the switching operation between locking and unlocking is convenient and fast, without any tools, and does not need to overcome other resistances. The plunger is processed as a whole, rather than threaded connection, which can effectively avoid the problem of being unable to lock or unlock due to loose threads.

[0028] Among them, a pin hole 12 is opened on the upper end of the plunger, and a pin hole 2 13 is opened on the movable handle 5. A split pin 6 is used to penetrate the pin hole 12 and the pin hole 2 13 to connect the plunger with the movable handle 5. The split pin 6 is used to connect the plunger and the movable handle 5, which is convenient for disassembly and assembly and has a simple structure.

[0029] Among them, the top of the ball head 2 is provided with a groove 4 for accommodating the movable handle 5. In the locked state, the top of the movable handle 5 is flush with the top of the ball head 2, and a groove 2 14 is provided on each side of the groove 4. When unlocking is required, the operator's fingers use the space of the groove 4 to easily lift the plunger upward.

[0030] Wherein, in the locked state, the first cylindrical section 10 is located at the step at the lower part of the channel. During the unlocking operation, the first cylindrical section 10 is prevented from being stuck by the step in the channel.

[0031] Working principle:

[0032] The operator holds the movable handle 5 and pulls the plunger up and down to lock and unlock the hook. When the plunger is pressed down, the conical structure at the bottom of the second cylindrical section 11 squeezes the two steel balls 8. The two steel balls 8 enter the through hole 7 under the squeezing action. The outer side of the steel balls 8 is pressed against the body 15 of the tractor to achieve locking. The plunger is pulled upward, and the upper end surface of the second cylindrical section 11 is pressed against the step at the bottom of the channel to achieve unlocking. The utility model has a simple overall structure, and the switching operation between locking and unlocking is convenient and fast, without any tools, and does not need to overcome other resistances. The plunger is processed as a whole, rather than threaded connection, which can effectively avoid the problem of being unable to lock or unlock due to loose threads.

[0033] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0034] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0035] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A detachable ball hitch for a gooseneck trailer, characterized in that: The invention comprises a cylindrical main body seat (1), a ball head (2) being integrally provided at the top of the main body seat (1), a boss (3) being integrally provided between the ball head (2) and the main body seat (1), a vertically penetrating passage being provided inside the main body seat (1), the ball head (2) and the boss (3), a plunger having a shape suitable for the passage being provided in the passage, a detachable movable handle (5) being provided at the top of the plunger, and the plunger being composed of a slender round rod (9), a first cylindrical section (10) and a second cylindrical section (11) from top to bottom, and the lower part of the second cylindrical section (11) being conical; The cylindrical main body seat (1) is provided with two through holes (7), and steel balls (8) are arranged in the through holes (7). When in a locked state, the second cylindrical section (11) is located between the two steel balls (8), and when in an unlocked state, the conical structure at the lower end of the second cylindrical section (11) is located between the two steel balls (8).

2. A detachable ball hitch for a gooseneck trailer according to claim 1, characterized in that: A pin hole 1 (12) is formed at the upper end of the plunger, and a pin hole 2 (13) is formed on the movable handle (5). A split pin (6) is inserted through the pin hole 1 (12) and the pin hole 2 (13) to connect the plunger to the movable handle (5).

3. A detachable ball hitch for a gooseneck trailer according to claim 1, characterized in that: A groove 1 (4) for accommodating a movable handle (5) is provided at the top end of the ball head (2).

4. A detachable ball hitch for a gooseneck trailer according to claim 3, characterized in that: A second groove (14) is provided on each side of the first groove (4).

5. A detachable ball hitch for a gooseneck trailer according to claim 3, characterized in that: In the locked state, the top of the movable handle (5) is flush with the top of the ball head (2).

6. A detachable ball hitch for a gooseneck trailer according to claim 1, characterized in that: In the locked state, the first cylindrical section (10) is located at the step at the lower part of the channel.

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