C-shaped track electric car

Abstract

The utility model provides a kind of C-shaped track electric car, belong to hoist car technical field.It solves the existing C-shaped track electric car and causes technical problems such as walking wheel and track contact badly due to gravity center deviation or load change.This C-shaped track electric car includes fixed frame, two groups of suspension wheel group, driving motor, locking arm articulated in fixed frame, power wheel group and locking device set in the upper portion of fixed frame, suspension wheel group and power wheel group are placed inside C-shaped track, suspension wheel group is compressed inside bottom surface of track by locking device, power wheel group is compressed inside top surface of track, form bidirectional clamping stable structure.The utility model has the advantages of running smoothly, preventing deviation and shaking, prolonging service life, reducing maintenance cost, light weight, low cost, low energy consumption, self-adapting track change, buffering impact and the like.

Description

Technical Field

[0001] This utility model belongs to the field of lifting machine trolley technology, specifically referring to a C-shaped track electric trolley. Background Technology

[0002] Current rail-mounted trolleys typically use two suspension wheels to suspend themselves on a C-shaped track, relying on their own weight for suspension. However, in actual lifting operations, due to shifts in the vehicle's center of gravity or changes in load during movement, the trolley's wheels may not maintain proper contact with the C-shaped track at all times. This increases the friction between the track and the wheels, and can even cause the trolley to veer off course. This situation not only affects operational efficiency but may also lead to safety hazards such as traction chain breakage and track deformation.

[0003] For example, as shown in the existing technology of a C-type track electric trolley with publication number CN221251153U, its vertical support mainly relies on two suspended wheels bearing the downward gravity, and a drive wheel providing driving force by pressing against the bottom of the C-shaped track groove through a spring. However, this support method is prone to a "seesaw" effect in actual operation: when the trolley passes through the track joint or when the track is slightly deformed, the contact pressure between the drive wheel and the track will fluctuate drastically, causing the trolley to run unstablely, resulting in bumps or swaying. In addition, the positive pressure of the drive wheel depends entirely on the preload of the spring. If the load suddenly increases, insufficient spring force will cause the drive wheel to slip, failing to effectively transmit traction. Under long-term operation, this unstable contact state will also cause uneven wear between the drive wheel and the bottom of the track groove, significantly shortening the service life of the equipment. Therefore, there is an urgent need for a C-type track electric trolley with a more reasonable structure, more stable operation, and greater adaptability to solve the above problems. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a C-shaped track electric sports car.

[0005] The objective of this utility model can be achieved through the following technical solution: A C-shaped track electric trolley includes a fixed frame and two sets of suspended wheel sets. A drive motor is fixedly installed on the fixed frame. Each of the suspended wheel sets is hinged with a locking arm, the upper end of which is hinged to the upper part of the fixed frame. A power wheel set is also provided on the upper part of the fixed frame, and the power wheel set is driven by the drive motor. A locking device is provided at the lower end of the locking arm. Both the suspended wheel sets and the power wheel sets are located inside the C-shaped track. Through the clamping force provided by the locking device, the suspended wheel sets are pressed against the inner bottom surface of the C-shaped track, and the power wheel sets are simultaneously pressed against the inner top surface of the C-shaped track, thereby forming a stable bidirectional clamping structure inside the track. The drive motor drives the power wheel sets to roll on the inner top surface of the C-shaped track.

[0006] Furthermore, the power wheel assembly includes a power fixed shaft and two drive wheels fixed at both ends of the power fixed shaft. The power fixed shaft is rotatably connected to the fixed frame through two power bearings. A power sprocket is also fixedly connected in the middle of the power fixed shaft. The motor includes a drive shaft and a drive sprocket fixedly connected to the drive shaft. The drive sprocket and the power sprocket are connected by a chain.

[0007] Furthermore, the aforementioned power wheel set consists of two sets, which are horizontally arranged on the upper part of the fixed frame.

[0008] Furthermore, the locking arm is shaped like a figure 7, and sequentially includes a first lever arm, a suspension arm, and a second lever arm. The length of the first lever arm is shorter than the length of the second lever arm. The upper end of the first lever arm is rotatably fixed to the fixed frame via a pin, and the lower end of the second lever arm is connected to a locking device. A suspension wheel assembly is hinged to the suspension arm, and a traction mounting rod is rotatably connected to the lower end of the locking arm. The traction mounting rod is used to connect lifting equipment, such as an electric hoist or other lifting mechanism. The electric trolley moves to traction the lifting equipment.

[0009] Furthermore, the suspension wheel assembly includes a suspension fixed shaft and two suspension moving wheels connected to both ends of the suspension fixed shaft via suspension bearings. The suspension arm is provided with a fixing hole, and a sliding sleeve passes through the fixing hole. The suspension fixed shaft is fixedly passed through the sliding sleeve.

[0010] Furthermore, the fixing frame includes two upper fixing plates, which are engaged and fixed by a pin shaft to form an installation gap between the two upper fixing plates. The power sprocket is located within the installation gap. The upper end of the first lever arm is sleeved outside the pin shaft by a rotating sleeve and is located within the installation gap. The fixing frame also includes two lower fixing plates, and the motor is fixed on the lower fixing plates.

[0011] Furthermore, the locking device includes a locking stud hinged to the lower end of the locking arm, a locking screw freely passing through the locking stud, a locking member fixedly disposed on the locking screw, and an elastic member sleeved on the locking screw.

[0012] Furthermore, there are two locking studs, each comprising a first cylindrical section and a second cylindrical section. The first cylindrical section passes through the lower end of the locking arm and is fixed to the fixing member. The second cylindrical section has an installation hole, and the locking screw passes through the installation hole.

[0013] Furthermore, a limiting sleeve is also fitted onto the locking screw, and the limiting sleeve is located between the two locking studs.

[0014] Furthermore, the locking screw includes a fixed section and a locking section. The outer diameter of the locking section is smaller than that of the fixed section. The locking section passes through the locking stud, the limiting sleeve, the locking stud and the elastic element in sequence before being fastened to the locking element.

[0015] Compared with existing technologies, the technical advantages of this utility model are as follows: 1. By actively applying clamping force through a locking device, the suspension wheel assembly and the drive wheel assembly are respectively pressed against the inner bottom and top surfaces of the C-shaped track, forming a self-balancing bidirectional clamping structure. This design fundamentally avoids the fluctuations in contact pressure between the wheel assembly and the track caused by center of gravity shift or load changes in traditional structures, effectively preventing the trolley from deviating, bumping, and shaking, improving operational stability, and eliminating safety hazards such as traction chain breakage and track deformation. 2. The bidirectional stable clamping ensures that the contact surfaces of the suspension wheel assembly and the drive wheel assembly with the track are continuously and evenly stressed, avoiding localized uneven wear and abnormal wear. This not only significantly reduces the wear rate of the wheel assembly and the track, extending the service life of key components, but also reduces the maintenance frequency and replacement costs of the equipment. 3. By directly housing the drive wheel assembly inside the C-shaped track, combined with a stable clamping force, it allows for the use of smaller diameter drive wheels and smaller, lighter, and more efficient drive motors such as permanent magnet synchronous motors. This reduces the overall weight, manufacturing cost, and operating energy consumption of the equipment, while enhancing overall rigidity, enabling smaller motors to handle heavier loads. Fourth, the articulated design of the locking arm allows the trolley to adapt to track manufacturing tolerances and installation errors, improving its adaptability to track variations and ensuring stable operation under various working conditions. Fifth, the locking device employs an elastic element and a limiting sleeve design, providing elastic buffering to absorb impacts caused by track joints or deformation, preventing drastic fluctuations in clamping force. The limiting sleeve controls the maximum compression of the elastic element, avoiding damage to components due to over-tightening, ensuring the flexibility and reliability of clamping force adjustment, and simplifying maintenance. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the present invention.

[0017] Figure 2 This is a side view of the present invention.

[0018] Figure 3 This is a frontal schematic diagram of the removal of the C-shaped track according to this utility model.

[0019] Figure 4 This is a cross-sectional view of the power wheel assembly of this utility model.

[0020] Figure 5 This is a cross-sectional view of the suspension wheel assembly of this utility model.

[0021] Figure 6 This is a cross-sectional view of the locking arm and fixing frame of this utility model.

[0022] Figure 7 This is a perspective view of the fixing frame, locking arm, suspension wheel assembly, drive wheel assembly, and locking device of this utility model.

[0023] Figure 8 This is a cross-sectional view of the locking device of this utility model.

[0024] Drawing number markings: 1. Suspension wheel assembly; 11. Suspension fixed shaft; 12. Suspension moving wheel; 13. Suspension bearing; 14. Sliding sleeve; 2. C-shaped track; 201. Inner bottom surface; 202. Inner top surface; 3. Locking arm; 31. First lever arm; 32. Suspension arm; 33. Second lever arm; 34. Rotating sleeve; 35. Fixing hole; 4. Fixing bracket; 41. Upper fixing plate; 42. Pin shaft; 43. Installation gap; 44. Lower fixing plate; 5. Drive wheel assembly; 5 1. Power fixed shaft; 52. Drive wheel; 53. Power bearing; 54. Power sprocket; 6. Locking device; 61. Locking stud; 611. First cylindrical section; 612. Second cylindrical section; 613. Fixing component; 62. Locking screw; 621. Fixing section; 622. Locking section; 63. Locking component; 64. Elastic component; 65. Limiting sleeve; 7. Motor; 71. Drive sprocket; 72. Chain; 8. Counterweight; 9. Traction mounting rod. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] It should be noted that the descriptions of "up", "down", "left", "right", "top", "bottom", etc. in this utility model are defined based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] According to the appendix Figures 1 to 8 As shown, the present invention provides a C-shaped track electric trolley, the core of which lies in the formation of a stable, self-balancing bidirectional clamping system inside the C-shaped track 2 through an active locking mechanism, thereby fundamentally improving the running stability, load-bearing capacity, and service life of the electric trolley. The electric trolley mainly includes a C-shaped track 2, a suspension wheel assembly 1, a fixed frame 4, a power wheel assembly 5, a pair of "7"-shaped locking arms 3, and a locking device 6.

[0028] The C-shaped track 2 has a "C"-shaped cross-section with an opening at its lower end. The two sides of the opening form the bottom walls for suspending the suspension wheel assembly 1. Both the suspension wheel assembly 1 and the drive wheel assembly 5 are housed within the internal cavity of the C-shaped track 2. The drive wheel assembly 5 abuts against the top wall of the C-shaped track 2, creating rolling friction to drive the electric sports car. A drive motor 7 is fixedly installed on the fixed frame 4; each suspension wheel assembly 1 is hinged with a locking arm 3, the upper end of the locking arm 3 being hinged to the upper part of the fixed frame 4; a power wheel assembly 5 is also provided on the upper part of the fixed frame 4, the power wheel assembly 5 being driven by the drive motor 7; a locking device 6 is provided at the lower end of the locking arm 3; both the suspension wheel assembly 1 and the power wheel assembly 5 are located inside the C-shaped track, and the clamping force provided by the locking device 6 causes the suspension wheel assembly 1 to press against the inner bottom surface 201 of the C-shaped track, and simultaneously causes the power wheel assembly 5 to press against the inner top surface 202 of the C-shaped track, thereby forming a stable bidirectional clamping structure inside the track; the drive motor 7 drives the power wheel assembly 5 to roll on the inner top surface 202 of the C-shaped track.

[0029] The mounting frame 4 includes two upper mounting plates 41 and two lower mounting plates 44. The two upper mounting plates 41 and the two lower mounting plates 44 are fixedly connected by an intermediate plate. The two upper mounting plates 41 are engaged and fixed by pins 42, forming an installation gap 43 in the middle. Preferably, there are two sets of power wheel sets 5, which are horizontally arranged on both sides of the upper part of the mounting frame 4. Each set of power wheel sets 5 includes a power fixed shaft 51, which is rotatably connected to the two upper mounting plates 41 through two power bearings 53. Drive wheels 52 are fixed at both ends of the shaft, and the drive wheels 52 are located on the outer side of the upper mounting plates 41. A power sprocket 54 is fixed in the middle of the power fixed shaft 51, and the power sprocket 54 is located within the aforementioned installation gap 43. The motor 7 is preferably a small, lightweight, and efficient permanent magnet synchronous motor 7. The motor 7 is fixed on the lower mounting plate 44, and a counterweight 8 is fixed on the other side of the lower mounting plate 44 opposite to the motor 7. A drive sprocket 71 is fixed on the drive shaft of the motor 7. The drive sprocket 71 is connected to the power sprocket 54 via the chain 72, thereby transmitting the power of the motor 7 to the power wheel set 5.

[0030] The locking arm 3 is shaped like a "7". Each locking arm 3 consists of a shorter first lever arm 31, a suspension arm 32, and a longer second lever arm 33 from top to bottom. The upper end of the first lever arm 31 is fitted onto the pin 42 of the fixed frame 4 via a rotating sleeve 34 and is located within the installation gap 43, thus achieving a hinge connection with the upper part of the fixed frame 4. The lower end of the second lever arm 33 is connected to the locking device 6. The suspension wheel assembly 1 is hinged to the suspension arm 32. The locking arm 3 is rotatably connected to the lower end of the suspension arm 32 with a traction mounting rod 9. The traction mounting rod 9 is also rotatably connected to the lower end of the suspension arm 32 of the locking arm 3 for connecting lifting equipment such as electric hoists, so that the trolley can pull the load. The suspension arm 32 is provided with a fixing hole 35. The suspension wheel assembly 1 includes a suspension fixing shaft 11 and two suspension moving wheels 12 mounted at both ends via suspension bearings 13. A sliding sleeve 14 passes through the fixing hole 35, and the suspension fixing shaft 11 is fixedly passed through the sliding sleeve 14.

[0031] The locking device 6 is located between the lower ends of the second lever arms 33 of the two locking arms 3. It includes two locking studs 61, a locking screw 62, a nut serving as a locking element 63, and an elastic element 64, preferably a helical spring. Each locking stud 61 consists of an integrally formed first cylindrical section 611 and a second cylindrical section 612. The first cylindrical section 611 passes through a hole at the lower end of the second lever arm 33 and is hinged by a fixing element 613. The second cylindrical section 612 has a mounting hole. The locking screw 62 includes a thicker fixing section 621 and a thinner locking section 622. During assembly, the locking section 622 passes sequentially through the mounting hole of one locking stud 61, a limiting sleeve 65, the mounting hole of the other locking stud 61, and the elastic element 64, and is finally tightened with the locking nut. The limiting sleeve 65 is located between the two locking studs 61, and its length determines the maximum compression of the elastic element 64, preventing over-tightening.

[0032] This sports car first establishes a self-balancing two-way clamping structure. When the locking nut is tightened, the two locking studs 61 tend to move towards each other under the traction of the locking screw 62. This horizontal locking force acts on the long arm end of the second lever arm 33. Through the lever action of the "7"-shaped locking arm 3, this horizontal force is synchronously and proportionally converted into two vertical forces: a downward force acts on the suspension wheel assembly 1, pressing it tightly against the inner bottom surface 201 of the C-shaped track 2; an upward force acts on the drive wheel assembly 5 through the fixing frame 4, pressing it tightly against the inner top surface 202 of the C-shaped track 2. These two forces are of the same origin, synchronous, and interconnected, forming a self-balancing couple system. Its core beneficial effect is that it completely eliminates the "seesaw" effect caused by load or center of gravity changes in traditional suspension sports cars. Any tendency to reduce the pressure on one wheel set will immediately be converted by this mechanism into a tendency to increase the pressure on the other wheel set, thereby dynamically maintaining the stability of the clamping force and ensuring that the train can run smoothly even when passing through track joints or when there is slight deformation, effectively preventing safety hazards such as deviation, bumps and traction chain breakage.

[0033] Secondly, it significantly extends the service life of the equipment. Due to the stable and uniform bidirectional clamping force, the contact surfaces of the suspended moving wheel 12 and drive wheel 52 with the C-shaped track 2 experience consistently balanced forces. This avoids localized uneven wear and abnormal wear caused by pressure fluctuations in traditional structures. The resulting benefits include a significant reduction in the wear rate of the wheel assembly and track, extending the service life of critical components, and reducing the frequency of equipment maintenance and subsequent replacement costs.

[0034] Third, this design achieves miniaturization and high efficiency of the drive system. By placing the drive wheel set 5 directly inside the C-shaped track 2 and relying on a stable clamping force to ensure traction, it is possible to use a small-diameter drive wheel 52. The direct benefit is that it eliminates the need for a large-torque, bulky drive motor 7. Therefore, a smaller, lighter, and more efficient motor 7, such as a permanent magnet synchronous motor 7, can be selected. This not only reduces the overall weight of the equipment, manufacturing costs, and operating energy consumption, but also makes the structure more compact. At the same time, the stable clamping structure enhances the overall rigidity of the vehicle, allowing the small-volume motor 7 to drive heavier loads. The reduced weight of the motor 7 and its corresponding counterweight 8 further reduces the risk of vehicle tilting and improves operational stability.

[0035] Furthermore, the sports car possesses excellent self-adaptation and cushioning capabilities. The articulated design of the locking arm 3 gives the sports car a certain degree of passive adaptability, allowing it to tolerate manufacturing tolerances and installation errors in the track. The elastic element 64 provides necessary elastic cushioning, effectively absorbing impacts and vibrations caused by track joints or slight deformations, preventing drastic fluctuations in clamping force and stress concentration, thereby protecting components and further improving operational smoothness.

[0036] The locking device 6 itself also boasts advantages in its design. The locking stud 61 separates the hinge function from the guiding and bearing function, resulting in a more rational stress distribution on the structure. The limiting sleeve 65 precisely controls the upper limit of the clamping force, preventing the elastic element 64 from being crushed and failing, and avoiding damage to other components. Through the lever principle, a small horizontal locking force applied at the end of the long lever arm can achieve a significantly amplified vertical clamping force at the wheel assembly, making operation easy and optimizing the system's stress distribution.

[0037] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A C-shaped track electric trolley, comprising a fixed frame (4) and two sets of suspension wheel sets (1), wherein a drive motor (7) is fixedly mounted on the fixed frame (4); characterized in that: Each of the suspended wheel sets (1) is hinged with a locking arm (3), the upper end of which is hinged to the upper part of the fixed frame (4); the upper part of the fixed frame (4) is also provided with a power wheel set (5), which is driven by the drive motor (7); the lower end of the locking arm (3) is provided with a locking device (6); the suspended wheel set (1) and the power wheel set (5) are both located inside the C-shaped track. Through the clamping force provided by the locking device (6), the suspended wheel set (1) is pressed against the inner bottom surface (201) of the C-shaped track, and the power wheel set (5) is simultaneously pressed against the inner top surface (202) of the C-shaped track, thereby forming a stable bidirectional clamping structure inside the track; the drive motor (7) drives the power wheel set (5) to roll on the inner top surface (202) of the C-shaped track; The locking arm (3) is shaped like the number 7. The locking arm (3) includes a first lever arm (31), a suspension arm (32), and a second lever arm (33) in sequence. The length of the first lever arm (31) is less than the length of the second lever arm (33). The upper end of the first lever arm (31) is rotatably fixed to the fixing frame (4) by a pin (42). The lower end of the second lever arm (33) is connected to the locking device (6). The suspension wheel assembly (1) is hinged on the suspension arm (32). The locking arm (3) is rotatably connected to the lower end of the suspension arm (32) with a traction mounting rod (9).

2. The C-shaped track electric trolley according to claim 1, characterized in that: The power wheel assembly (5) includes a power fixed shaft (51) and two drive wheels (52) fixed at both ends of the power fixed shaft (51). The power fixed shaft (51) is rotatably connected to the fixed frame (4) through two power bearings (53). A power sprocket (54) is also fixedly connected in the middle of the power fixed shaft (51). The motor (7) includes a drive shaft and a drive sprocket (71) fixedly connected to the drive shaft. The drive sprocket (71) and the power sprocket (54) are connected by a chain (72).

3. The C-shaped track electric trolley according to claim 2, characterized in that: The power wheel set (5) has two sets, and the two sets of power wheel sets (5) are horizontally arranged on the upper part of the fixed frame (4).

4. The C-shaped track electric trolley according to claim 1, characterized in that: The suspension wheel assembly (1) includes a suspension fixed shaft (11) and two suspension moving wheels (12) connected to both ends of the suspension fixed shaft (11) by suspension bearings (13). The suspension arm (32) is provided with a fixing hole (35), and a sliding sleeve (14) is inserted into the fixing hole (35). The suspension fixed shaft (11) is fixedly inserted into the sliding sleeve (14).

5. A C-shaped track electric trolley according to claim 2, characterized in that: The fixing frame (4) includes two upper fixing plates (41), which are engaged and fixed by a pin (42) to form an installation gap (43) between the two upper fixing plates (41). The power sprocket (54) is located in the installation gap (43). The upper end of the first lever arm (31) is sleeved on the outside of the pin (42) by a rotating sleeve (34) and is located in the installation gap (43). The fixing frame (4) also includes two lower fixing plates (44), and the motor (7) is fixed on the lower fixing plates (44).

6. A C-shaped track electric trolley according to any one of claims 1 to 5, characterized in that: The locking device (6) includes a locking stud (61) hinged to the lower end of the locking arm (3), a locking screw (62) freely passing through the locking stud (61), a locking member (63) fixedly installed on the locking screw (62), and an elastic member (64) sleeved on the locking screw (62).

7. A C-shaped track electric trolley according to claim 6, characterized in that: There are two locking studs (61). The locking studs (61) include a first cylindrical section (611) and a second cylindrical section (612). The first cylindrical section (611) passes through the lower end of the locking arm (3) and is fixed to the fixing member (613). The second cylindrical section (612) has an installation hole, and the locking screw (62) passes through the installation hole.

8. A C-shaped track electric trolley according to claim 7, characterized in that: The locking screw (62) is also fitted with a limiting sleeve (65), which is located between the two locking studs (61).

9. A C-shaped track electric trolley according to claim 8, characterized in that: The locking screw (62) includes a fixed section (621) and a locking section (622). The outer diameter of the locking section (622) is smaller than that of the fixed section (621). The locking section (622) passes through the locking stud (61), the limiting sleeve (65), the locking stud (61), and the elastic element (64) in sequence before being fastened to the locking element (63).

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