Forklift portal frame forward moving mechanism based on single-motor coaxial double-chain transmission

Abstract

The utility model discloses a forklift portal frame forward moving mechanism based on single-motor coaxial double-chain transmission, which comprises a transmission shaft and a transmission chain, a driving device is arranged on the transmission shaft, and the driving device is used for driving the transmission shaft to rotate. Compared with a common oil cylinder transmission forward-moving mode, the chain transmission forward-moving mode has infinite extensibility, compared with a gear rack forward-moving mode, the whole mechanism can be installed in a vehicle body except for a fixing base connected with a portal frame, and space is saved. Therefore, the forward-moving type forklift truck can be widely applied to the forward-moving type forklift truck with a tight channel and a large load center distance. The synchronism of transmission chains at the two ends is ensured through single-motor driving and whole-shaft transmission, and then the high stability of operation of the portal is ensured. The motor is provided with an electromagnetic brake, so that the motor has a self-locking function, and the gantry can be prevented from shaking when the forklift is started, stopped or driven at variable speed. And a complete process control system is matched, so that the forklift can obtain more stable and efficient operation capability.

Description

Technical Field

[0001] The utility model relates to the technical field of forklift door frame forward movement structures, in particular to a forklift door frame forward movement mechanism based on single-motor coaxial double-chain transmission. Background Art

[0002] Using the oil cylinder as the forward movement method is limited by the installation distance of the oil cylinder itself and cannot be extended at will. It cannot meet the requirement of arbitrarily customizing the forward movement distance when the installation distance remains unchanged. In addition, some cross-arranged oil cylinders will cause speed changes during the forward and backward movement, which is not stable enough;

[0003] The gear rack is used as the forward moving method, which requires extremely high manufacturing and installation precision, and the use of couplings will deteriorate the synchronization of the two ends. In addition, the entire mechanism except the rack needs to be installed on the gantry, which makes the overall width of the gantry thicker and increases the channel parameters of the forklift;

[0004] The hydraulic motor drives the chain as the forward movement method, which generally requires dual motors, has many and complicated pipes, poor maintainability, and cannot achieve complete process control. Utility Model Content

[0005] The purpose of the utility model is to solve the problems of the above-mentioned background technology, and to propose a forklift door frame forward movement mechanism based on a single-motor coaxial double-chain drive.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A forklift gantry forward movement mechanism based on a single-motor coaxial double-chain drive, comprising a transmission shaft and a transmission chain, wherein a driving device is arranged on the transmission shaft, and the driving device is used to drive the transmission shaft to rotate, and a first transmission sprocket is arranged at the end of the transmission shaft, and the transmission chain is arranged at both ends of the transmission shaft, and the transmission chain and the first transmission sprocket tooth ring, and a forward movement device fixing seat is detachably installed on the transmission chain.

[0008] As a further solution of the utility model: the driving device includes a motor, an electromagnetic brake is installed on the motor, a reducer is also arranged between the motor and the transmission shaft, and a multi-turn potentiometer is installed on the reducer.

[0009] As a further solution of the utility model: a bearing seat is also installed on the transmission shaft, and the transmission shaft is inserted into the bearing seat and rotates.

[0010] As a further solution of the utility model: a deep groove ball bearing is arranged in the bearing seat.

[0011] As a further solution of the utility model: the ends of the transmission chain are connected end to end, and the end to end of the transmission chain is connected by a connecting piece.

[0012] As a further solution of the utility model: a bearing mounting seat is arranged at one end of the transmission chain away from the transmission shaft, a second transmission sprocket is rotatably connected to the bearing mounting seat, and the second transmission sprocket is meshed with the transmission chain.

[0013] As a further solution of the utility model: a deep groove ball bearing is arranged in the bearing mounting seat.

[0014] As a further solution of the utility model: a chain tensioning device is detachably mounted on the transmission chain.

[0015] The beneficial effects of the utility model are as follows: the chain-driven forward movement method has unlimited extensibility compared to the general cylinder-driven forward movement method, and compared to the rack-and-pinion forward movement method, the entire mechanism can be installed inside the vehicle body except for the fixed seat connected to the gantry, saving space. Therefore, the reach-type forklift can be more widely used, especially for reach-type forklifts with tight aisles and large load center distances. The single-motor drive and full-axis drive ensure the synchronization of the transmission chains at both ends, thereby ensuring the high stability of the gantry operation. The motor is equipped with an electromagnetic brake, which gives it a self-locking function, which can prevent the gantry from shaking when the forklift starts or stops or changes speed. With a complete process control system, the forklift can obtain a more stable and efficient operating capability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 3 It is a circuit diagram of the utility model.

[0020] In the figure: 1. electromagnetic brake; 2. motor; 3. reducer; 4. multi-turn potentiometer; 5. large gear; 6. spacer; 8. bearing outer ring baffle; 9. transmission shaft; 10. bearing seat; 12. first transmission sprocket; 13. baffle; 14. flat key; 15. hole card; 16. transmission chain; 17. forward moving device fixing seat; 18. bearing mounting seat; 19. hole card; 21. shaft card; 22. hole card; 23. retaining ring; 24. second transmission sprocket; 25. chain tensioning device; 26. thumb switch; 27. PLC; 28. controller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] For example, see Figure 1-2 As shown, the utility model is a forklift gantry forward movement mechanism based on a single-motor coaxial double-chain drive, including a transmission shaft 9 and a transmission chain 16, characterized in that a driving device is arranged on the transmission shaft 9, and the driving device is used to drive the transmission shaft 9 to rotate, and a first transmission sprocket 12 is arranged at the end of the transmission shaft 9, and the transmission chain 16 is arranged at both ends of the transmission shaft 9, and the transmission chain 16 and the first transmission sprocket 12 tooth ring, and a forward movement device fixing seat 17 is detachably installed on the transmission chain 16.

[0023] For example 2, please refer to Figure 1-2 As shown, the utility model is a forklift gantry forward movement mechanism based on a single-motor coaxial double-chain drive, including a transmission shaft 9 and a transmission chain 16, characterized in that a driving device is arranged on the transmission shaft 9, and the driving device is used to drive the transmission shaft 9 to rotate, and a first transmission sprocket 12 is arranged at the end of the transmission shaft 9, and the transmission chain 16 is arranged at both ends of the transmission shaft 9, and the transmission chain 16 and the first transmission sprocket 12 tooth ring, and a forward movement device fixing seat 17 is detachably installed on the transmission chain 16.

[0024] The driving device includes a motor 2, an electromagnetic brake 1 is installed on the motor 2, a reducer 3 is also arranged between the motor 2 and the transmission shaft 9, and a multi-turn potentiometer 4 is installed on the reducer 3. A bearing seat 10 is also installed on the transmission shaft 9, and the transmission shaft 9 is inserted and rotated in the bearing seat 10. A deep groove ball bearing is arranged in the bearing seat 10.

[0025] For example 3, please refer to Figure 1-2 As shown, the utility model is a forklift gantry forward movement mechanism based on a single-motor coaxial double-chain drive, including a transmission shaft 9 and a transmission chain 16, characterized in that a driving device is arranged on the transmission shaft 9, and the driving device is used to drive the transmission shaft 9 to rotate, and a first transmission sprocket 12 is arranged at the end of the transmission shaft 9, and the transmission chain 16 is arranged at both ends of the transmission shaft 9, and the transmission chain 16 and the first transmission sprocket 12 tooth ring, and a forward movement device fixing seat 17 is detachably installed on the transmission chain 16.

[0026] The driving device includes a motor 2, an electromagnetic brake 1 is installed on the motor 2, a reducer 3 is also arranged between the motor 2 and the transmission shaft 9, and a multi-turn potentiometer 4 is installed on the reducer 3. A bearing seat 10 is also installed on the transmission shaft 9, and the transmission shaft 9 is inserted and rotated in the bearing seat 10. A deep groove ball bearing is arranged in the bearing seat 10.

[0027] A bearing mounting seat 18 is disposed at one end of the transmission chain 16 away from the transmission shaft 9 , and a second transmission sprocket 24 is rotatably connected to the bearing mounting seat 18 , and the second transmission sprocket 24 is meshed with the transmission chain 16 .

[0028] A deep groove ball bearing is arranged in the bearing mounting seat 18 .

[0029] The transmission chain 16 is also detachably provided with a chain tensioning device 25 .

[0030] It is worth adding that:

[0031] The motor 2 outputs power and is equipped with an electromagnetic brake 1 .

[0032] The motor 2 is connected to the reducer 3, which is positioned and installed on the vehicle body and outputs torque. The large gear 5 in the reducer 3 is connected to the transmission shaft 9 by a key, and the transmission shaft 9 is driven by the entire shaft to ensure synchronization of both ends.

[0033] The transmission shaft 9 is prevented from axial movement by a spacer 6, a deep groove ball bearing and a bearing outer ring baffle 8 at the point where the transmission shaft 9 exits the reducer 3 housing. The transmission shaft 9 is supported by a bearing seat 10 on the side away from the reducer 3. A deep groove ball bearing and a hole card 15 are installed in the bearing seat 10 to ensure smooth rotation of the shaft.

[0034] The first transmission sprocket 12 is installed at the end of the transmission shaft 9 with a flat key 14. The shaft end has a positioning step for the sprocket. The first transmission sprocket 12 is locked with a countersunk screw and a baffle 13.

[0035] The countersunk screw and the retaining ring 23 are used to lock the second transmission sprocket 24. The sprocket shaft is installed with the bearing mounting seat 18 through a deep groove ball bearing, and the hole card 19 and the shaft card 22 limit the movement of the bearing. The bearing mounting seat 18 is installed on the positioning surface of the vehicle body leg through the hexagon socket screw.

[0036] Figure 3 The control system logic shown is that PLC27 receives the operation instruction from the thumb switch 26 and sends it to the controller 28 for processing. The controller 28 controls the action of the motor 2. The multi-turn potentiometer 4 can feed back the real-time position of the door frame to the controller 28 through value conversion.

[0037] The motor 2 is the only power output, which is transmitted through a rigid transmission shaft 9. This single motor drive coaxial transmission structure can ensure the synchronization of the entire mechanism. Through the feedback of the multi-turn potentiometer 4, the real-time position of the gantry can be sent to the controller 28, so that the control system can fully grasp the movement process of the gantry;

[0038] There is an electromagnetic brake 1 at the tail of the motor 2 to ensure the self-locking performance of the gantry moving forward and prevent the gantry from shaking when the vehicle starts or stops or changes speed;

[0039] The transmission sprocket 12 and the transmission sprocket 24 are the same sprockets, and when the sprockets are manufactured, the position of the keyway relative to the teeth must meet the positioning accuracy requirements to ensure the synchronization of the chain transmission at both ends;

[0040] The control system can grasp the actual position of the gantry during forward and backward movement through real-time feedback from the multi-turn potentiometer 4, so that the high-speed zone, low-speed zone and deceleration zone can be subdivided to achieve stability and efficiency in the movement state of the entire forward movement system.

[0041] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the claims of the utility model.

Claims

1. A forklift gantry forward movement mechanism based on a single motor coaxial double chain drive, comprising a transmission shaft (9) and a transmission chain (16), characterized in that: The transmission shaft (9) is provided with a driving device, and the driving device is used to drive the transmission shaft (9) to rotate. A first transmission sprocket (12) is provided at the end of the transmission shaft (9). The transmission chain (16) is provided at both ends of the transmission shaft (9). The transmission chain (16) and the first transmission sprocket (12) are toothed rings, and a forward moving device fixing seat (17) is detachably mounted on the transmission chain (16).

2. According to claim 1, a forklift gantry forward movement mechanism based on a single motor coaxial double chain drive is characterized in that: The driving device comprises a motor (2), an electromagnetic brake (1) is mounted on the motor (2), a reducer (3) is arranged between the motor (2) and the transmission shaft (9), and a multi-turn potentiometer (4) is mounted on the reducer (3).

3. The forklift gantry forward moving mechanism based on single motor coaxial double chain transmission according to claim 1 is characterized in that: A bearing seat (10) is also mounted on the transmission shaft (9), and the transmission shaft (9) is inserted into the bearing seat (10) and rotates.

4. The forklift gantry forward moving mechanism based on single motor coaxial double chain transmission according to claim 3 is characterized in that: A deep groove ball bearing is arranged in the bearing seat (10).

5. The forklift gantry forward moving mechanism based on single motor coaxial double chain transmission according to claim 1 is characterized in that: The ends of the transmission chain (16) are connected end to end, and the end to end of the transmission chain (16) is connected via a connecting piece.

6. The forklift gantry forward moving mechanism based on single motor coaxial double chain transmission according to claim 1 is characterized in that: A bearing mounting seat (18) is provided at one end of the transmission chain (16) away from the transmission shaft (9), and a second transmission sprocket (24) is rotatably connected to the bearing mounting seat (18), and the second transmission sprocket (24) is meshed with the transmission chain (16).

7. The forklift gantry forward moving mechanism based on single motor coaxial double chain transmission according to claim 6 is characterized in that: A deep groove ball bearing is arranged in the bearing mounting seat (18).

8. The forklift gantry forward moving mechanism based on single motor coaxial double chain transmission according to claim 1 is characterized in that: A chain tensioning device (25) is also detachably mounted on the transmission chain (16).

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