Detachable external steering mechanism for mobile commercial body

Abstract

The utility model discloses a detachable external steering mechanism for a mobile commercial body, and relates to the technical field of manufacturing of mobile commercial equipment. The detachable outside-vehicle steering mechanism for the mobile commercial body comprises a connecting rod, the section of the connecting rod is in a concentric-square shape, the tail end of the connecting rod is provided with an inner inclined inserting opening, the front end of the connecting rod is connected with a rotating seat, the rotating seat forms a universal shaft structure through a four-shaft ball, a ball support and a pin, the ball support is connected with a pull rod, a detachable pull rod is arranged in the pull rod, and the tail end of the connecting rod is connected with a connecting block through a pin shaft. According to the detachable outside-vehicle steering mechanism for the mobile commercial body, multi-angle operation is achieved through the universal shaft, rapid disassembly and assembly are facilitated through the inner inclined inserting opening, the turning radius can be adjusted through multiple pin holes, the adaptability is improved through the detachable pull rod, and stable force transmission is achieved through the overall structure; the device is suitable for mobile dining cars and other equipment and can adapt to complex scenes, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of mobile commercial equipment manufacturing technology, and in particular to a detachable external steering mechanism for mobile commercial vehicles. Background Technology

[0002] Traditional steering mechanisms mostly use flange fixing or welding connections. The assembly between components relies on professional tools, and the installation takes a long time (usually more than 5 minutes). Furthermore, disassembly and maintenance require complete disassembly, resulting in low maintenance efficiency and making it difficult to meet the needs of mobile commercial facilities for frequent relocation and rapid debugging.

[0003] Most steering mechanisms' control levers can only rotate in one direction and cannot flexibly adjust the force angle according to the operator's position (such as the side or rear of the vehicle) or space limitations. This can easily lead to operational jamming or loss of force transmission. Especially when turning in narrow areas, operators need to frequently adjust their posture, increasing labor intensity.

[0004] The existing steering linkage rods and connecting blocks of the mechanism are mostly fixed connections, which can only achieve a single turning radius and cannot adapt to the passage needs of mobile commercial buildings in different scenarios - such as needing a small radius turn in narrow streets and a large radius smooth turn in open squares, resulting in limited equipment adaptability.

[0005] The handles, connectors and other components of the steering mechanism are mostly of fixed size and cannot be replaced or adapted according to the operator's hand size, operating habits or different vehicle models (such as food carts and vending carts with different wheel tracks). Components need to be designed separately for each scenario, increasing equipment adaptation costs. At the same time, metal components are susceptible to corrosion in humid and dusty outdoor environments, leading to a shortened service life and increased maintenance frequency.

[0006] Some mechanisms use pins or bolts with large gaps at their connection points, which can easily loosen during frequent steering operations, resulting in significant loss of force transmission and even steering delay or deviation, affecting the accuracy and safety of operation. Utility Model Content

[0007] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a detachable external steering mechanism for mobile commercial vehicles that can solve the above-mentioned problems.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a detachable external steering mechanism for mobile commercial buildings, including a connecting rod, the connecting rod having a U-shaped cross section, and an inwardly inclined socket fixedly connected to the end of the connecting rod near the wheel, the inner wall of the inwardly inclined socket being inclined at 30° to form an outer wide and inner narrow structure, and a connecting rod through hole provided on one side of the inwardly inclined socket;

[0009] A rotating seat is fixedly connected to the front end of the connecting rod. A four-axis ball is rotatably connected to the rotating seat. A ball bracket is rotatably connected to the tail end of the four-axis ball. Pins are provided on the ball bracket and the rotating seat. The rotating seat and the four-axis ball, as well as the ball bracket and the four-axis ball, are all fixed by pins. A pull rod is fixedly connected to the top end of the ball bracket. A detachable pull rod is fixedly connected inside the pull rod.

[0010] A connecting block is provided at the tail end of the connecting rod, and a pin hole is provided in the middle of the connecting block. The three pin holes are evenly spaced. A connecting block head hole is provided at the front end of the connecting block, and a connecting block tail hole is provided at the tail end of the connecting block. A pin shaft is movably connected to the tail end of the connecting rod.

[0011] A connector is provided at the tail of the connecting block. The connector has a through hole. A pin is movably connected to the connecting block. The pin is rotatably connected to a steering connecting rod. The pin is movably connected to the pin hole.

[0012] Preferably, the detachable pull rod can be replaced with handles of different sizes and models.

[0013] Preferably, the rotating seat, four-axis ball, ball support, and pin constitute a universal joint structure.

[0014] Preferably, the inwardly inclined socket is wider on the outside and narrower on the inside.

[0015] Preferably, the pin is a cylindrical pin or a tapered pin, and the pin hole tolerance is controlled at the H7 / m6 level.

[0016] Preferably, the tail hole of the connecting block and the through hole of the connecting member are fixedly connected by detachable bolts.

[0017] Preferably, the detachable pull rod is provided with anti-slip texture.

[0018] Preferably, the connecting block head hole and the connecting rod through hole are fixedly connected by a pin.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This mobile commercial vehicle uses a detachable external steering mechanism with a two-way rotation design of four-axis ball and rotary seat, ball bracket and four-axis ball, combined with the quick locking / releasing function of the pin, which allows the lever to be operated flexibly in multiple directions such as horizontal, vertical or tilt, solving the problem of limited operating angle of traditional steering mechanisms and adapting to the force exertion needs of operators in different positions or narrow spaces.

[0021] This mobile commercial vehicle uses a detachable external steering mechanism. The detachable lever inside the lever plays a key role. Its surface anti-slip texture (static friction coefficient ≥0.5) can effectively prevent slippage during operation and ensure stable force transmission. The design of interchangeable handles of different sizes and models can be flexibly adapted to the operator's hand size or operating habits (e.g., thick handles are suitable for operation with gloves, and thin handles are suitable for fine control), further improving the accuracy of force transmission.

[0022] This mobile commercial vehicle uses a detachable external steering mechanism. The inwardly inclined socket at the end of the connecting rod adopts a 30° inclined structure with a wider outer surface and a narrower inner surface. When the connecting block is inserted, it can be automatically guided to align by the inclined surface, which greatly reduces the installation difficulty and shortens the insertion and assembly time of the connecting block from 5 minutes in the traditional structure to less than 1 minute. At the same time, the head hole of the connecting block and the through hole of the connecting rod are rigidly fixed by a pin. Combined with the fixing of the tail of the connecting block to the connecting piece by a detachable bolt, the tail hole of the connecting block and the through hole of the connecting piece cooperate to form a rigid transmission chain of "connecting rod-connecting block-connecting piece". This ensures that there is no significant loss of force during transmission and finally efficiently transmits it to the wheel steering structure connected to the connecting piece to achieve precise steering. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0024] Figure 1 This is a schematic diagram of a detachable external steering mechanism for a mobile commercial complex according to the present invention;

[0025] Figure 2 This is a schematic diagram of a quick-release structure for a detachable external steering mechanism for a mobile commercial complex according to this utility model;

[0026] Figure 3 This is a perspective view of a detachable external steering mechanism for a mobile commercial vehicle according to the present invention.

[0027] Reference numerals: 1. Rotary seat; 2. Pull rod; 3. Connecting rod; 4. Pin; 5. Connecting block; 6. Pin; 7. Connecting piece; 8. Pin hole; 9. Connecting rod through hole; 10. Detachable pull rod; 11. Ball bracket; 12. Four-axis ball; 13. Inward tilting socket; 14. Connecting block tail hole; 15. Connecting piece through hole; 16. Pin; 17. Steering connecting rod; 18. Connecting block head hole. Detailed Implementation

[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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 element 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] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Please see Figure 1-3 This utility model provides a technical solution: a detachable external steering mechanism for mobile commercial vehicles, including a connecting rod 3. The connecting rod 3 has a U-shaped cross section. An inwardly inclined socket 13 is fixedly connected to the end of the connecting rod 3 near the rear of the wheel. The inner wall of the inwardly inclined socket 13 is inclined at 30°, forming an outer width and an inner narrowness, which serves as an installation guide and facilitates quick insertion and installation. A connecting rod through hole 9 is provided on one side of the inwardly inclined socket 13.

[0033] A rotating seat 1 is fixedly connected to the front end of the connecting rod 3. A four-axis ball joint 12 is rotatably connected to the rotating seat 1. A ball bracket 11 is rotatably connected to the tail end of the four-axis ball joint 12. A pin 16 is provided on the ball bracket 11 and the rotating seat 1. The rotating seat 1 and the four-axis ball joint 12, as well as the ball bracket 11 and the four-axis ball joint 12, are all fixed by the pin 16. The rotating seat 1, the four-axis ball joint 12, the ball bracket 11, and the pin 16 constitute a universal joint structure. A pull rod 2 is fixedly connected to the top end of the ball bracket 11. A detachable pull rod 10 is fixedly connected inside the pull rod 2. The detachable pull rod 10 is provided with anti-slip texture. The detachable pull rod 10 can be replaced with handles of different sizes and models to adapt to more complex situations.

[0034] The bidirectional rotation design of the four-axis ball 12 and the rotating seat 1, and the ball bracket 11 and the four-axis ball 12, combined with the quick locking / releasing function of the pin 16, allows the pull rod 2 to operate flexibly in multiple directions such as horizontal, vertical or tilting, which solves the problem of limited operating angle of traditional steering mechanisms and adapts to the force exertion needs of operators in different positions or narrow spaces.

[0035] The detachable pull rod 10 inside the pull rod 2 plays a key role. Its surface anti-slip texture (static friction coefficient ≥0.5) can effectively prevent slippage during operation and ensure stable force transmission. The design of replaceable handles of different sizes and models can be flexibly adapted to the operator's hand size or operating habits (such as thick handles are suitable for operation with gloves, and thin handles are suitable for fine control), further improving the accuracy of force transmission.

[0036] A connecting block 5 is provided at the tail end of the connecting rod 3. A pin hole 8 is provided in the middle of the connecting block 5. The three pin holes 8 are evenly spaced. A connecting block head hole 18 is provided at the front end of the connecting block 5. A connecting block tail hole 14 is provided at the tail end of the connecting block 5. A pin shaft 4 is movably connected to the tail end of the connecting rod 3. The connecting block head hole 18 and the connecting rod through hole 9 are fixedly connected by the pin shaft 4. The connecting block 5 can be quickly inserted and installed through the inwardly inclined insertion port 13.

[0037] The tail of the connecting block 5 is provided with a connector 7, and the connector 7 is provided with a connector through hole 15. The tail hole 14 of the connecting block and the connector through hole 15 are fixedly connected by a detachable bolt.

[0038] The inwardly inclined socket 13 at the tail end of the connecting rod 3 adopts a 30° inclined outer-wide and inner-narrow structure. When the connecting block 5 is inserted, it can be automatically guided to align by the inclined surface, which greatly reduces the installation difficulty and shortens the insertion and assembly time of the connecting block 5 from 5 minutes in the traditional structure to less than 1 minute. At the same time, the connecting block head hole 18 and the connecting rod through hole 9 are rigidly fixed by the pin 4. Combined with the fixing of the tail end of the connecting block 5 to the connecting piece 7 by the detachable bolt, the connecting block tail hole 14 and the connecting piece through hole 15 cooperate to form a rigid transmission chain of "connecting rod-connecting block-connecting piece", ensuring that there is no significant loss of force during the transmission process. Finally, the force is efficiently transmitted to the wheel steering structure connected to the connecting piece 7 to achieve precise steering.

[0039] A pin 6 is movably connected to the connecting block 5. The pin 6 is rotatably connected to the steering connecting rod 17. The pin 6 is movably connected to the pin hole 8. The pin 6 is adjusted by the pin hole 8 at different positions, thereby driving the steering connecting rod 17 to achieve different wheel turning radii.

[0040] The three pin holes 8 are evenly spaced (e.g., 20mm apart). By inserting the pin 6 into the pin holes 8 at different positions, the connection point between the pin 6 and the connecting block 5 can be changed, thereby adjusting the lever arm length of the steering connecting rod 17. The difference in lever arm length will directly affect the steering torque, ultimately achieving graded adjustment of the wheel turning radius to meet the different needs of mobile commercial buildings in narrow streets or open squares. At the same time, the pin holes 8 adopt a countersunk design to prevent the pin 6 from protruding from the surface of the connecting block 5, reducing the risk of collision during operation and improving safety.

[0041] Working principle: When the operator applies push, pull or steering force through the lever 2, the force is first transmitted to the ball support 11. Since the ball support 11, the four-axis ball 12, the rotating seat 1 and the pin 16 constitute a universal joint structure, the four-axis ball 12 can rotate freely relative to the rotating seat 1, and the ball support 11 can rotate freely relative to the four-axis ball 12. By pulling out / inserting the pin 16, the rotation angle can be fixed or released, so that the lever 2 can be flexibly operated in multiple directions (such as horizontal, vertical or inclined directions) to adapt to different operating positions and angle requirements. The universal joint structure stably transmits the operator's force to the rotating seat 1, and then transmits it backward through the connecting rod 3 fixed to the rotating seat 1.

[0042] After receiving the force transmitted from the rotating seat 1, the connecting rod 3 transmits the force to the connecting block 5 through the pin 4 at the tail end. The inwardly inclined insertion port 13 at the tail end of the connecting rod 3 has a 30° inclined outer-wide and inner-narrow structure, which can guide the connecting block 5 to be quickly inserted and installed. The connecting block head hole 18 and the connecting rod through hole 9 are fixed by the pin 4 to ensure the rigid connection between the connecting rod 3 and the connecting block 5. The force can be transmitted to the connecting block 5 without loss. The tail end of the connecting block 5 is fixed to the connecting piece 7 by a detachable bolt. The connecting block tail hole 14 and the connecting piece through hole 15 cooperate. The connecting piece 7 can be connected to the wheel steering structure and finally transmit the force to the wheel to realize the steering action.

[0043] Three pin holes 8 are evenly arranged on the connecting block 5. The pin 6 can be movably connected to the pin holes 8 at different positions. The pin 6 is rotatably connected to the steering connecting rod 17. When the pin 6 is inserted into different pin holes 8, the connection point between the pin 6 and the connecting block 5 changes, which causes the lever arm length of the steering connecting rod 17 to change. The difference in lever arm length will cause the torque when the steering connecting rod 17 drives the wheel to rotate to be different, ultimately realizing the adjustment of the wheel's different turning radius to adapt to the different turning needs of mobile commercial buildings in narrow spaces or open areas.

[0044] The detachable pull rod 10 inside the pull rod 2 improves operational stability through anti-slip texture and can be replaced with handles of different sizes and models to adapt to the usage habits of different operators or complex scenarios (such as high and low positions, space constraints, etc.). The connecting block 5 and the connecting rod 3 are detachably connected by the pin 4, and the connecting block 5 and the connecting piece 7 are detachably connected by the detachable bolt. Combined with the quick insertion design of the inward tilting socket 13, the entire mechanism is easy to disassemble, maintain or replace parts, improving the flexibility of use.

[0045] The pull rod 2 and the detachable pull rod 10, the connecting rod 3 and the connecting block 5, and the connecting block 5 and the connecting piece 7 are all connected by pins 4 or bolts, and can be disassembled and replaced individually. For example, when the detachable pull rod 10 is worn, it is not necessary to replace the entire pull rod assembly, only the handle needs to be replaced, reducing the replacement cost of a single part by 40%. If the connecting block 5 or the connecting piece 7 is damaged, it can also be quickly disassembled and replaced, shortening the maintenance time by 50%.

[0046] All metal parts are hot-dip galvanized (zinc layer thickness ≥80μm), and do not rust after salt spray testing for >1000 hours. Even when used in humid or dusty outdoor environments, they can effectively resist corrosion and reduce maintenance frequency. This design also improves the versatility of the mechanism. By replacing the connectors 7 of different sizes, it can be adapted to different models of mobile commercial vehicles (such as mobile food carts and vending carts) with wheel tracks ranging from 1.5 to 2.5m. There is no need to design a steering mechanism separately for each type of vehicle, reducing equipment adaptation costs.

[0047] Structural Description:

[0048] Rotary seat 1: It is fixedly connected to the front end of the connecting rod 3 and rotatably connected to the four-axis ball 12. It is fixed to the four-axis ball 12 by the pin 16. It is an important component of the universal joint structure. As the basic component of the universal joint structure, it provides stable rotation support for the four-axis ball 12, ensuring that the four-axis ball 12 can flexibly achieve multi-angle rotation. In this way, it works with the ball bracket 11 to transmit the steering force applied by the operator, laying the foundation for multi-angle operation of the entire mechanism.

[0049] Pull rod 2: It is fixedly connected to the top of the ball bracket 11 and has a detachable pull rod 10 fixedly connected inside. It is the direct force-bearing component for the operator to apply steering force. Through the fixed connection with the ball bracket 11, it stably transmits the external force to the universal joint structure. The design of the detachable pull rod 10 inside allows pull rod 2 to adapt to different operating needs and expands the applicability of the mechanism.

[0050] Connecting rod 3: The cross-section is U-shaped. The front end is fixedly connected to the rotating seat 1, and the rear end is fixedly connected to the inwardly inclined socket 13. The rear end is movably connected to the pin 4. The U-shaped cross-section design achieves lightweighting while ensuring structural strength. Compared with solid rods, it reduces weight by more than 30%, while improving bending and torsional resistance by 40%. It can efficiently transmit force and is not easily deformed. The fixed connection between the front end and the rotating seat 1 and the rear end and the inwardly inclined socket 13 enables the force to be stably transmitted from the front universal joint structure to the connecting block 5 at the rear end, which is the core carrier of force transmission.

[0051] Pin 4: It is movably connected to the tail of the connecting rod 3 and is used to fix the head hole 18 of the connecting block and the through hole 9 of the connecting rod. It is made of 40Cr alloy steel and has a hardness of HRC40~45 after quenching treatment. It has strong shear resistance and can ensure the rigid connection between the connecting rod 3 and the connecting block 5, so that there is no obvious loss of force during the transmission process. At the same time, it is easy to disassemble and install the connecting rod 3 and the connecting block 5, and improve the convenience of maintenance.

[0052] Connecting block 5: It has a connecting block head hole 18 at the front end, three evenly spaced pin holes 8 in the middle, and a connecting block tail hole 14 at the rear end. It is movably connected to a pin 6 and a connector 7 at the rear end. As an intermediate hub for force transmission, it is connected to the connecting rod 3 through the connecting block head hole 18 and to the connector 7 through the connecting block tail hole 14, forming a rigid transmission chain of "connecting rod-connecting block-connecting component" to ensure efficient force transmission. The three pin holes 8 in the middle provide different connection positions for the pin 6, realizing graded adjustment of the turning radius to meet the steering needs in different scenarios.

[0053] Pin 6: It is movably connected to the pin hole 8 of the connecting block 5 and rotatably connected to the steering connecting rod 17. By inserting the pin hole 8 at different positions, the connection point with the connecting block 5 is changed, thereby adjusting the lever arm length of the steering connecting rod 17 and realizing the adjustment of the wheel turning radius. Its rotatable connection with the steering connecting rod 17 ensures that the force can be smoothly transmitted to the wheel steering structure during the adjustment process.

[0054] Connector 7: It is provided with a connector through hole 15 and is fixedly connected to the connector tail hole 14 at the tail of the connector block 5 by a detachable bolt. It can be connected to the wheel steering structure. As an intermediate component between the connector block 5 and the wheel steering structure, it is detachably connected to the connector block 5 by a detachable bolt, which is convenient for maintenance and replacement. At the same time, its connection with the wheel steering structure ultimately transmits the force to the wheel. It is a key connecting component for realizing steering action. It is manufactured by forging process, which improves the structural strength and fatigue resistance.

[0055] Pin hole 8: Located in the middle of the connecting block 5, three holes are evenly spaced (e.g., 20mm spacing) for the movable connection of the pin 6. The even spacing design makes the position adjustment of the pin 6 more precise. Through the pin holes 8 at different positions, the step length of the steering connecting rod 17 can be stably changed in stages, thereby accurately controlling the turning radius of the wheel (e.g., 5m, 7m, 10m). The countersunk design avoids the pin 6 from protruding, reducing the risk of collision during operation and improving safety.

[0056] Connecting rod through hole 9: It is set on one side of the inwardly inclined insertion port 13 and is fixedly connected to the connecting block head hole 18 by a pin 4. It provides a connection point for the pin 4 and, together with the connecting block head hole 18, fixes the connecting rod 3 and the connecting block 5, ensuring the stability of the connection between the two and enabling the force to be transmitted from the connecting rod 3 to the connecting block 5 without loss.

[0057] Detachable pull rod 10: Fixedly connected inside the pull rod 2, with anti-slip texture on the surface. It can be replaced with handles of different sizes and models. The anti-slip texture (static friction coefficient ≥0.5) can effectively prevent slippage during operation and ensure stable transmission of the force applied by the operator. The design of replacing handles of different sizes and models can adapt to the hand size and operating habits of different operators (such as thick handles are suitable for operation with gloves, and thin handles are suitable for fine control), improving the comfort and accuracy of operation. At the same time, it is easy to replace it individually after wear, reducing maintenance costs.

[0058] Ball bracket 11: The tail end is rotatably connected to the four-axis ball 12, and the top end is fixedly connected to the pull rod 2. It is fixed to the four-axis ball 12 by the pin 16. It is a component of the universal joint structure and serves as a connecting bridge between the pull rod 2 and the four-axis ball 12. It transmits the force transmitted by the pull rod 2 to the four-axis ball 12. At the same time, its rotatable connection with the four-axis ball 12, combined with the fixing function of the pin 16, allows the universal joint structure to flexibly adjust the angle and lock, ensuring the effective transmission of force in different directions.

[0059] The four-axis ball joint 12 is rotatably connected to the rotary seat 1 and rotatably connected to the tail of the ball support 11. It is fixed to the rotary seat 1 and the ball support 11 respectively by the pin 16. It is the core rotating component of the universal joint structure, with multi-directional rotation capability. It can rotate freely relative to the rotary seat 1 and the ball support 11. With the locking function of the pin 16, it can achieve multi-angle fixation, ensuring that the force applied by the operator in different positions or spaces can be stably transmitted to the connecting rod 3, thus improving the flexibility and adaptability of the mechanism operation.

[0060] The inwardly inclined socket 13 is fixedly connected to the tail end of the connecting rod 3. The inner wall is inclined at 30°, forming a structure that is wider on the outside and narrower on the inside. A connecting rod through hole 9 is provided on one side. The 30° inclined design of being wider on the outside and narrower on the inside can automatically guide the alignment of the connecting block 5 when it is inserted, which greatly reduces the difficulty of installation and shortens the insertion and assembly time of the connecting block 5 from 5 minutes in the traditional structure to less than 1 minute, improving the installation efficiency. At the same time, it provides preliminary positioning for the connection between the connecting rod 3 and the connecting block 5, enhancing the stability of the connection.

[0061] Tail hole 14 of connecting block: It is set at the tail of connecting block 5 and is fixedly connected to the through hole 15 of connecting part by a detachable bolt. It provides a connection point for the detachable bolt and, together with the through hole 15 of connecting part, fixes connecting block 5 and connecting part 7, ensuring the rigidity of the connection between the two, so that the force can be stably transmitted from connecting block 5 to connecting part 7. At the same time, it facilitates the disassembly of connecting block 5 and connecting part 7, making it convenient for maintenance and replacement of parts.

[0062] Connector through hole 15: It is set on the connector 7 and is fixedly connected to the tail hole 14 of the connector block by a detachable bolt. It cooperates with the tail hole 14 of the connector block to provide a connection channel for the detachable bolt, realize the fixed connection between the connector 7 and the connector block 5, and ensure the effective transmission of force from the connector block 5 to the connector 7. At the same time, the design of the detachable bolt facilitates the separation of the two and improves the convenience of maintenance.

[0063] Pin 16: Set on the rotary seat 1 and the ball support 11, used to fix the rotary seat 1 and the four-axis ball 12, and the ball support 11 and the four-axis ball 12. It is a cylindrical pin or a tapered pin (selected according to the actual load). The pin hole tolerance is controlled at the H7 / m6 level to ensure positioning accuracy and anti-loosening ability. It can withstand shear force of more than 500N and can stably lock the relative position of the rotary seat 1 and the four-axis ball 12, and the ball support 11 and the four-axis ball 12, to ensure the stability of the universal joint structure when transmitting force, and at the same time, it is easy to unlock to adjust the angle.

[0064] Steering connecting rod 17: Rotatably connected to pin 6, and driven by pin 6 to achieve wheel steering. As a component connecting pin 6 and wheel steering structure, it can convert the difference in lever arm caused by the position change of pin 6 into the change in wheel steering torque, thereby realizing the adjustment of different turning radii and ensuring efficient and accurate force transmission.

[0065] Connecting block head hole 18: It is set at the front end of the connecting block 5 and is fixedly connected to the connecting rod through hole 9 by a pin 4. It cooperates with the connecting rod through hole 9 to provide a connection position for the pin 4, realize the fixation of the connecting block 5 and the connecting rod 3, ensure the firmness of the connection between the two, and enable the force to be smoothly transmitted from the connecting rod 3 to the connecting block 5. It is an important connection point in the force transmission path.

[0066] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A detachable external steering mechanism for mobile commercial vehicles, comprising a connecting rod (3), characterized in that: The connecting rod (3) has a U-shaped cross section. The connecting rod (3) is fixedly connected to an inwardly inclined socket (13) near the tail end of the wheel. A connecting rod through hole (9) is provided on one side of the inwardly inclined socket (13). The front end of the connecting rod (3) is fixedly connected to a rotating seat (1), a four-axis ball (12) is rotatably connected to the rotating seat (1), and the tail of the ball bracket (11) is rotatably connected to the four-axis ball (12). Pins (16) are provided on the ball bracket (11) and the rotating seat (1). The rotating seat (1) and the four-axis ball (12), as well as the ball bracket (11) and the four-axis ball (12), are all fixed by pins (16). A pull rod (2) is fixedly connected to the top of the ball support (11), and a detachable pull rod (10) is fixedly connected inside the pull rod (2).

2. The detachable external steering mechanism for mobile commercial buildings according to claim 1, characterized in that: The inner wall of the inwardly inclined socket (13) is inclined at 30°, forming a structure that is wide on the outside and narrow on the inside.

3. The detachable external steering mechanism for mobile commercial buildings according to claim 2, characterized in that: The connecting rod (3) has a connecting block (5) at its tail end, and a pin hole (8) is provided in the middle of the connecting block (5). The three pin holes (8) are evenly spaced.

4. A detachable external steering mechanism for mobile commercial buildings according to claim 3, characterized in that: The connecting block (5) has a connecting block head hole (18) at the front end and a connecting block tail hole (14) at the rear end. The connecting rod (3) is movably connected to a pin (4) at the rear end.

5. A detachable external steering mechanism for mobile commercial buildings according to claim 4, characterized in that: The connecting block (5) is provided with a connector (7) at its tail. The connector (7) is provided with a connector through hole (15). The connecting block (5) is movably connected with a pin (6). The pin (6) is rotatably connected with a steering connecting rod (17). The pin (6) is movably connected to the pin hole (8).

6. A detachable external steering mechanism for mobile commercial buildings according to claim 5, characterized in that: The rotating seat (1), four-axis ball (12), ball bracket (11), and pin (16) constitute a universal joint structure.

7. A detachable external steering mechanism for mobile commercial buildings according to claim 6, characterized in that: The connecting block head hole (18) and the connecting rod through hole (9) are fixedly connected by a pin (4).

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