Trundle

Abstract

The invention provides a trundle. The trundle comprises a trundle frame, a first driving wheel, a second driving wheel, a first driving mechanism, a second driving mechanism and a vehicle body connecting seat, the vehicle body connecting seat is installed on the wheel carrier and used for connecting the wheel carrier to a vehicle body, a hinge head is arranged between the vehicle body connecting seat and the wheel carrier, the upper end of the hinge head is rotationally connected to the vehicle body connecting seat, the lower end of the hinge head is hinged to the middle of the wheel carrier, and the rotating axis of the upper end of the hinge head is perpendicular to the rotating axis of the lower end of the hinge head; the first driving wheel and the second driving wheel are rotationally connected to the two ends of the wheel frame correspondingly and located on the two radial sides of the rotating axis of the lower end of the hinge head correspondingly. The first driving mechanism and the second driving mechanism are both installed on the wheel frame and used for driving the first driving wheel and the second driving wheel to rotate correspondingly. The structure can prevent the trundle from being suspended, keep the adhesive force between the driving wheel and the ground, and ensure the driving reliability of the driving wheel.

Description

Technical Field

[0001] The present invention relates to the technical field of transport vehicle equipment, in particular to a caster. Background Art

[0002] As a tool for transporting goods, trucks are widely used in warehousing and logistics, textile, papermaking, food and other industries, and have become an indispensable tool in people's daily production and life. Ordinary trucks usually use rigidly connected casters. The rigid casters have poor adhesion to the ground, resulting in the truck's single wheel touching the ground when moving on uneven ground, and the truck may not move smoothly or even tilt or roll over. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the caster has poor adhesion to the ground, which causes the transport vehicle to easily tilt or roll over. In order to overcome the above defects of the prior art, the present invention provides a caster.

[0004] The present invention provides a caster, comprising a wheel frame, a first driving wheel, a second driving wheel, a first driving mechanism, a second driving mechanism and a vehicle body connecting seat; the vehicle body connecting seat is installed on the wheel frame and is used to connect the wheel frame to the vehicle body, a hinge head is provided between the vehicle body connecting seat and the wheel frame, the upper end of the hinge head is rotatably connected to the vehicle body connecting seat, the lower end of the hinge head is hinged to the middle part of the wheel frame, and the rotation axis centerline of the upper end of the hinge head and the rotation axis centerline of the lower end of the hinge head are arranged perpendicular to each other; the first driving wheel and the second driving wheel are respectively rotatably connected to the two ends of the wheel frame, and are respectively located on the radial sides of the rotation axis centerline of the lower end of the hinge head; the first driving mechanism and the second driving mechanism are both installed on the wheel frame, and the first driving mechanism and the second driving mechanism are respectively used to drive the rotation of the first driving wheel and the second driving wheel.

[0005] Compared with the prior art, the caster disclosed in the present application has the following advantages: a hinge head is provided, the upper end of the hinge head is rotatably connected to the vehicle body connecting seat, the lower end of the hinge head is hinged to the middle part of the frame, the first driving mechanism drives the first driving wheel to rotate, and the second driving mechanism drives the second driving wheel to rotate, so that the frame can achieve circumferential free rotation or forward and backward movement, and the two ends of the frame can rotate around the middle part of the frame, so that at least one driving wheel can contact the ground, avoiding the caster from being suspended in the air, maintaining the adhesion between the driving wheel and the ground, and ensuring the driving reliability of the driving wheel.

[0006] In a possible implementation manner, a hinge shaft is fixedly connected to the lower end of the hinge head, a hinge seat is fixedly connected to the wheel frame, a hinge hole is provided on the hinge seat, and the hinge shaft is rotatably connected in the hinge hole.

[0007] Compared with the prior art, the above technical solution can realize the hinge connection between the hinge head and the wheel frame, and the hinge connection is stable and reliable.

[0008] In a possible implementation manner, a first bearing is provided between the reaming hole and the reaming shaft.

[0009] Compared with the prior art, the above technical solution can improve the hinge reliability between the hinge head and the wheel frame.

[0010] In a possible implementation manner, a second bearing is sleeved on the upper end of the hinge head, and the hinge head is rotatably connected to the vehicle body connecting seat through the second bearing.

[0011] Compared with the prior art, the above technical solution can improve the rotation reliability of the hinge head and the vehicle body connecting seat.

[0012] In a possible implementation, the first driving mechanism includes a driving motor, a driving gear, a transmission gear, a driven gear and a rotating shaft, the driving motor is mounted on a wheel frame, the driving gear is fixed on an output shaft of the driving motor, the rotating shaft is rotatably disposed on the wheel frame, the driven gear is fixed on the rotating shaft, the transmission gear is rotatably connected to the wheel frame and meshes with the driving gear and the driven gear for transmission, and the first driving wheel is connected to the rotating shaft.

[0013] Compared with the prior art, the above technical solution can realize stable driving of the driving mechanism on the driving wheel and the gear transmission structure, thereby improving the transmission reliability.

[0014] In a possible embodiment, a reduction assembly is provided between the first driving wheel and the rotating shaft, and the reduction assembly includes a sun gear, a planetary gear, a planetary carrier and an inner gear ring, the sun gear is fixedly connected to the rotating shaft, the inner gear ring is fixed to the wheel carrier and is coaxially arranged with the sun gear, the planetary gear is rotatably connected to the planetary carrier, the planetary gears are respectively meshed with the sun gear and the inner gear ring, and the planetary carrier is fixedly connected to the first driving wheel.

[0015] Compared with the prior art, the above technical solution can decelerate the driving wheel, increase the torque of the driving wheel, and improve the driving reliability of the caster.

[0016] In a possible implementation manner, there are three planetary gears, and the three planetary gears are distributed circumferentially on the planet carrier.

[0017] Compared with the prior art, the above technical solution can improve the reliability of deceleration operation.

[0018] In a possible implementation manner, both the first driving wheel and the second driving wheel are provided with wear-resistant and non-slip rubber rims.

[0019] Compared with the prior art, the above technical solution can increase the friction between the driving wheel and the ground and improve the driving reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 The cross section of the present invention Figure 1 ; Figure 3 The cross section of the present invention Figure 2 ; Figure 4 The cross section of the present invention Figure 3 ; Figure 5 The cross section of the present invention Figure 4 ; Description of reference numerals: 1. Wheel carrier; 2. First driving wheel; 3. Second driving wheel; 4. First driving mechanism; 41. Driving motor; 42. Driving gear; 43. Transmission gear; 44. Driven gear; 45. Rotating shaft; 5. Second driving mechanism; 6. Vehicle body connecting seat; 7. Hinge head; 8. Hinge shaft; 9. Hinge seat; 91. Reaming hole; 10. First bearing; 20. Second bearing; 30. Speed ​​reduction assembly; 301. Sun gear; 302. Planetary gear; 303. Planet carrier; 304. Inner gear ring; 40. Rubber wheel rim. DETAILED DESCRIPTION

[0021] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0022] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0023] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] See also Figures 1 to 5 The embodiment of the present application discloses a caster, including a wheel frame 1, a first driving wheel 2, a second driving wheel 3, a first driving mechanism 4, a second driving mechanism 5 and a vehicle body connecting seat 6; the vehicle body connecting seat 6 is installed on the wheel frame 1 and is used to connect the wheel frame 1 to the vehicle body, a hinge head 7 is provided between the vehicle body connecting seat 6 and the wheel frame 1, the upper end of the hinge head 7 is rotatably connected to the vehicle body connecting seat 6, the lower end of the hinge head 7 is hinged to the middle of the wheel frame 1, and the rotation axis of the upper end of the hinge head 7 and the rotation axis of the lower end of the hinge head 7 are arranged perpendicular to each other; the first driving wheel 2 and the second driving wheel 3 are respectively rotatably connected to the two ends of the wheel frame 1, and are respectively located on the radial sides of the rotation axis of the lower end of the hinge head 7; the first driving mechanism 4 and the second driving mechanism 5 are both installed on the wheel frame 1, and the first driving mechanism 4 and the second driving mechanism 5 are respectively used to drive the rotation of the first driving wheel 2 and the second driving wheel 3. The rotation axis centerline of the upper end of the hinge head 7, the rotation axis centerline of the lower end of the hinge head 7, and the rotation axis centerline of the driving wheel are all arranged perpendicular to each other.

[0026] As can be known from the above, by setting the hinge head 7, the upper end of the hinge head 7 is rotatably connected to the vehicle body connecting seat 6, and the lower end of the hinge head 7 is hinged to the middle part of the frame. The first driving mechanism 4 drives the first driving wheel 2 to rotate, and the second driving mechanism 5 drives the second driving wheel 3 to rotate. Even if the frame can achieve circumferential free rotation or forward and backward movement, and the two ends of the frame can rotate around the middle part of the frame, at least one driving wheel can contact the ground, avoiding the caster from being suspended in the air, maintaining the adhesion between the driving wheel and the ground, and ensuring the driving reliability of the driving wheel.

[0027] Continue to see Figure 2 In this embodiment, the hinge head 7 is fixedly connected to a hinge shaft 8 at the lower end, and the wheel frame 1 is fixedly connected to a hinge seat 9, and the hinge seat 9 is provided with a reaming hole 91, and the hinge shaft 8 is rotatably connected in the reaming hole 91, thereby realizing the hinge head 7 and the wheel frame 1. The hinge is stable and reliable. Specifically, a first bearing 10 is provided between the reaming hole 91 and the hinge shaft 8 to improve the hinge reliability of the hinge head 7 and the wheel frame 1. The first bearing 10 is a self-lubricating bearing.

[0028] In this embodiment, the upper end of the hinge head 7 is sleeved with a second bearing 20, and the hinge head 7 is rotatably connected to the vehicle body connection seat 6 through the second bearing 20, thereby improving the rotation reliability of the hinge head 7 and the vehicle body connection seat 6. The second bearing 20 is a ball bearing.

[0029] Continue to see Figure 3 and Figure 4In this embodiment, the first driving mechanism 4 includes a driving motor 41, a driving gear 42, a transmission gear 43, a driven gear 44 and a rotating shaft 45. The driving motor 41 is installed on the wheel frame 1, the driving gear 42 is fixed on the output shaft of the driving motor 41, the rotating shaft 45 is rotatably set on the wheel frame 1, the driven gear 44 is fixed on the rotating shaft 45, the transmission gear 43 is rotatably connected to the wheel frame 1 and meshes with the driving gear 42 and the driven gear 44 for transmission, the first driving wheel 2 is connected to the rotating shaft 45, and the second driving mechanism 5 is arranged in the same structure as the first driving mechanism 4, thereby realizing the stable driving of the driving mechanism to the driving wheel, and the gear transmission structure improves the transmission reliability. The driving motor 41 is a private service motor.

[0030] Continue to see Figure 4 and Figure 5 In this embodiment, a reduction assembly 30 is provided between the first driving wheel 2 and the rotating shaft 45, and the reduction assembly 30 includes a sun gear 301, a planetary gear 302, a planetary carrier 303 and an inner gear ring 304. The sun gear 301 is fixedly connected to the rotating shaft 45, and the inner gear ring 304 is fixed to the wheel carrier 1 and is coaxially arranged with the sun gear 301. The planetary gear 302 is rotatably connected to the planetary carrier 303, and the planetary gear 302 is meshed with the sun gear 301 and the inner gear ring 304 respectively. The planetary carrier 303 is fixedly connected to the first driving wheel 2, thereby enabling the driving wheel to be reduced in speed, increasing the torque of the driving wheel, and improving the driving reliability of the caster. Specifically, there are three planetary gears 302, and the three planetary gears 302 are distributed circumferentially on the planetary carrier 303. The sun gear 301 is integrally formed on the rotating shaft 45 to improve the structural reliability.

[0031] In this embodiment, the first driving wheel 2 and the second driving wheel 3 are both provided with a wear-resistant and non-slip rubber rim 40, thereby increasing the friction between the driving wheel and the ground and improving the driving reliability.

[0032] In the description of the embodiments of the present application, it should be noted that in the description of the present application, terms such as "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description, and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application.

[0033] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A caster, characterized in that: It comprises a wheel frame (1), a first driving wheel (2), a second driving wheel (3), a first driving mechanism (4), a second driving mechanism (5) and a vehicle body connecting seat (6); The vehicle body connection seat (6) is mounted on the wheel frame (1) and is used to connect the wheel frame (1) to the vehicle body. A hinge head (7) is provided between the vehicle body connection seat (6) and the wheel frame (1). The upper end of the hinge head (7) is rotatably connected to the vehicle body connection seat (6). The lower end of the hinge head (7) is hinged to the middle of the wheel frame (1). The rotation axis centerline of the upper end of the hinge head (7) and the rotation axis centerline of the lower end of the hinge head (7) are arranged perpendicular to each other. The first driving wheel (2) and the second driving wheel (3) are rotatably connected to the two ends of the wheel frame (1) and are respectively located on both sides of the radial direction of the rotation axis of the lower end of the hinge head (7); The first driving mechanism (4) and the second driving mechanism (5) are both mounted on the wheel frame (1); the first driving mechanism (4) and the second driving mechanism (5) are respectively used to drive the first driving wheel (2) and the second driving wheel (3) to rotate.

2. The caster according to claim 1, characterized in that: The lower end of the hinge head (7) is fixedly connected to a hinge shaft (8), the wheel frame (1) is fixedly connected to a hinge seat (9), the hinge seat (9) is provided with a hinge hole (91), and the hinge shaft (8) is rotatably connected in the hinge hole (91).

3. The caster according to claim 2, characterized in that: A first bearing (10) is provided between the reaming hole (91) and the reaming shaft (8).

4. The caster according to claim 2, characterized in that: The upper end of the hinge head (7) is sleeved with a second bearing (20), and the hinge head (7) is rotatably connected to the vehicle body connecting seat (6) via the second bearing (20).

5. The caster according to claim 1, characterized in that: The first driving mechanism (4) comprises a driving motor (41), a driving gear (42), a transmission gear (43), a driven gear (44) and a rotating shaft (45); the driving motor (41) is mounted on the wheel frame (1); the driving gear (42) is fixed on the output shaft of the driving motor (41); the rotating shaft (45) is rotatably arranged on the wheel frame (1); the driven gear (44) is fixed on the rotating shaft (45); the transmission gear (43) is rotatably connected to the wheel frame (1) and meshes with the driving gear (42) and the driven gear (44) for transmission; and the first driving wheel (2) is connected to the rotating shaft (45).

6. The caster according to claim 5, characterized in that: A reduction assembly (30) is provided between the first driving wheel (2) and the rotating shaft (45), and the reduction assembly (30) comprises a sun gear (301), planetary gears (302), a planet carrier (303) and an inner gear ring (304), wherein the sun gear (301) is fixedly connected to the rotating shaft (45), the inner gear ring (304) is fixed to the wheel carrier (1) and is coaxially arranged with the sun gear (301), the planetary gears (302) are rotatably connected to the planet carrier (303), the planetary gears (302) are respectively meshed with the sun gear (301) and the inner gear ring (304), and the planet carrier (303) is fixedly connected to the first driving wheel (2).

7. The caster according to claim 6, characterized in that: There are three planetary gears (302), and the three planetary gears (302) are distributed circumferentially on the planet carrier (303).

8. The caster according to claim 1, characterized in that: The first driving wheel (2) and the second driving wheel (3) are both provided with wear-resistant and anti-slip rubber rims (40).

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