A drive for a sampling trolley

Abstract

The utility model relates to a kind of sample car transmission devices, it includes car shell, the car shell bottom is provided with four supports, transmission device is arranged in the car shell, the transmission device includes motor, speed reducer and synchronous chain component, the output shaft of the motor is connected with the input shaft of the speed reducer, the output shaft of the speed reducer drives the synchronous chain component circulation movement.The utility model has the effect that transmission is compact, and guiding is accurate.

Description

Technical Field

[0001] This utility model relates to the field of sampling machine technology, and in particular to a sampling trolley transmission device. Background Technology

[0002] In large-scale grain depot sampling operations, the sampling trolley needs to drive the sampling rod to rise and fall stably to collect stratified samples of the grain pile. These samples are directly used to detect key indicators such as grain moisture and impurities, and are an important basis for ensuring grain quality and storage management. The reliability and synchronization of the sampling trolley's transmission system directly determine the smoothness of the sampling rod's rise and fall, the accuracy of the sampling points, and the efficiency of the operation, which is a core prerequisite for ensuring the validity of the sampling data.

[0003] In existing technologies, the transmission devices of sampling trolleys generally suffer from defects such as loose power transmission layers, insufficient chain tension, and weak guiding constraints of the sampling rod. For example, in some devices, the transmission chain between the motor and the actuator is too long, resulting in high power loss and poor synchronization of multiple wheels; the sampling rod is constrained only by a single guide, causing large radial swing amplitude during high-speed lifting and lowering, resulting in sampling point deviation. These defects lead to low sampling efficiency, high equipment failure rate, and difficulty in meeting the precision sampling requirements of large-scale grain depots. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a sample trolley transmission device with compact transmission and precise guidance.

[0005] The above-mentioned utility model objective is achieved through the following technical solution:

[0006] A transmission device for a sampling trolley includes a trolley shell, four supports on the bottom surface of the trolley shell, and a transmission device disposed inside the trolley shell.

[0007] The transmission device includes a motor, a reducer, and a synchronization chain assembly. The output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer drives the synchronization chain assembly to circulate.

[0008] The above technical solution provides a core of a sampling trolley transmission device with a compact structure and clear power transmission. After the motor drives the device and the speed is increased and adjusted by the reducer, the synchronous chain assembly realizes a reliable and synchronous cyclic motion output, providing a stable power foundation for the lifting and lowering of the sampling rod.

[0009] As a further technical solution of this utility model: the synchronization chain assembly includes an inner sprocket set, a drive shaft, and an outer sprocket set.

[0010] The inner sprocket assembly includes a driving sprocket, multiple driven sprockets, and a drive chain. The driving sprocket is connected to the output end of the reducer, and the drive chain meshes with the driving sprocket and the multiple driven sprockets.

[0011] One end of the drive shaft is connected to the driven sprocket, and the other end passes through the car body and is connected to the outer sprocket assembly.

[0012] Through the above technical solution, an efficient internal structure of chain drive is constructed. The inner sprocket set effectively receives power from the reducer and transmits it through multiple wheels. The drive shaft accurately guides the power to the outside of the car body, and the outer sprocket set is responsible for the final execution, realizing a reliable and smooth transition of power from the inside of the car body to the external actuator.

[0013] As a further technical solution of this utility model: the outer sprocket assembly includes a first transmission chain and a second transmission chain arranged symmetrically;

[0014] Both the first and second transmission chains have clamping blocks on their outer sides for clamping the sampling rod.

[0015] By utilizing the above technical solution, the symmetrically arranged double drive chains (first and second drive chains) and the clamping blocks on the outside of the chains ensure a stable and balanced clamping force on the sampling rod, effectively preventing the sampling rod from deflecting, shaking, or falling off during the lifting and lowering process, thus improving the stability and reliability of the sampling process.

[0016] As a further technical solution of this utility model: a spring tensioner is engaged on the slack side of the transmission chain.

[0017] By applying a spring-type tensioner to the slack side of the transmission chain, the above technical solution can automatically compensate for the elongation of the chain caused by wear or thermal expansion and contraction, continuously maintain the appropriate tension of the chain, effectively prevent problems such as tooth skipping, chain slippage, increased vibration and noise caused by chain slack, and ensure the long-term stability and reliability of the transmission chain.

[0018] As a further technical solution of this utility model: a first limiting device is provided on the top surface of the vehicle body, and a second limiting device is provided on the bottom surface of the vehicle body.

[0019] By using the above technical solution, limiting devices (first and second limiting devices) are set on the top and bottom surfaces of the vehicle body, respectively, which provide precise physical limits on the lifting and lowering stroke of the sampling rod, prevent it from rising or falling beyond its range, protect the safety of the equipment itself and the sampling rod, and ensure that the sampling action is completed within the set effective range.

[0020] As a further technical solution of this utility model: it also includes a guide assembly on the same side as the outer sprocket set and disposed on the side of the vehicle body, the guide assembly including a guide sleeve and two sets of roller sets;

[0021] The guide sleeve is disposed at the top of the side of the vehicle body;

[0022] The two sets of rollers are respectively arranged vertically above and below the outer sprocket set. Each set of rollers includes two symmetrically arranged rollers, and the rollers have arc-shaped grooves that are adapted to the sampling rod.

[0023] The above technical solution provides multi-level guidance and constraint for the sampling rod; the guide sleeve at the top provides initial positioning and main constraint, while the upper and lower sets of rollers with arc-shaped grooves provide rolling support and limit the sampling rod from directly above and directly below, respectively, effectively suppressing the radial swing and vibration of the sampling rod during movement, and ensuring that it always rises and falls smoothly along the predetermined straight trajectory.

[0024] In summary, this utility model has at least one of the following beneficial technical effects:

[0025] 1. This utility model discloses a sampling trolley transmission device, which achieves stable power output and synchronous movement of the sampling rod by integrating motor drive, speed reduction and torque amplification and synchronous chain transmission.

[0026] 2. This utility model discloses a sampling trolley transmission device, which achieves reliable clamping of the sampling rod, smooth power transmission, and long-term stable operation of the chain by constructing an inner and outer sprocket group transmission structure and supplementing it with a chain clamping block and a tensioner.

[0027] 3. This utility model discloses a sampling trolley transmission device, which achieves precise control of the lifting stroke of the sampling rod and radial stability and linear guidance during the movement process by setting a stroke limit device and a multi-stage guide roller assembly. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a sampling trolley transmission device with a sampling rod according to the present invention.

[0029] Figure 2 This is a front view of a sample trolley transmission device.

[0030] Figure 3 This is a side view of a sample-taking trolley transmission device.

[0031] Figure 4 This is an internal structural diagram of a sample-taking trolley transmission device.

[0032] Figure 5 This is an enlarged schematic diagram of the clamping block in a sample trolley transmission device.

[0033] Reference numerals: 1. Car body; 2. Transmission device; 3. Support; 21. Motor; 22. Reducer; 23. Synchronous chain assembly; 231. Inner sprocket assembly; 2311. Driving sprocket; 2312. Driven sprocket; 2313. Transmission chain; 232. Transmission shaft; 233. Outer sprocket assembly; 2331. First transmission chain; 2332. Second transmission chain; 4. Clamping block; 5. Spring tensioner; 6. First limiting device; 7. Second limiting device; 8. Guide assembly; 81. Guide sleeve; 82. Roller assembly; 821. Roller; 9. Sampling rod. Detailed Implementation

[0034] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] Example 1:

[0038] Reference Figure 1 and Figure 4The present invention discloses a sample trolley transmission device, including a car body 1. The bottom surface of the car body 1 is fixedly connected to four supports 3 by threads to support the overall structure. The car body 1 integrates a transmission device 2, which consists of a motor 21, a reducer 22 (worm gear reducer) and a synchronous chain assembly 23. The output shaft of the motor 21 is directly connected to the input shaft of the reducer 22, and the output shaft of the reducer 22 drives the synchronous chain assembly 23 to achieve cyclic motion.

[0039] Reference Figure 2 and Figure 4 The synchronization chain assembly 23 includes an inner sprocket set 231, a drive shaft 232, and an outer sprocket set 233. The inner sprocket set 231 is equipped with a driving sprocket 2311, three driven sprockets 2312, and a drive chain 2313. The driving sprocket 2311 is fixed to the output end of the reducer 22, and the drive chain 2313 simultaneously meshes with the driving sprocket 2311 and the three driven sprockets 2312. One end of the drive shaft 232 is coaxially connected to the driven sprockets 2312, and the other end passes through the car body 1 and connects to the outer sprocket set 233. The outer sprocket set 233 symmetrically arranges the first drive chain 2331 and the second drive chain 2332, and clamping blocks 4 are installed at intervals on the outer sides of both to clamp the sampling rod 9.

[0040] Reference Figure 4 The slack side of the inner drive chain 2313 engages with a spring-type tensioner 5. The spring-type tensioner 5 includes an axial guide fixed to the car body 1. An elastic element is sleeved on the guide. The two ends of the elastic element abut against the car body 1 and a bracket that can slide along the guide. A tensioning wheel is installed on the bracket through a shaft and a bearing. The tensioning wheel engages with the inner drive chain 2313. The elastic element pushes the bracket so that the tensioning wheel always presses tightly against the slack side of the inner drive chain 2313 to maintain the tension.

[0041] Reference Figure 1 and Figure 3 The top surface of the car body 1 is vertically fixed with bolts to a first limiting device 6 (such as a contact-type limit switch), with its trigger end facing the rod body area of ​​the sampling rod 9. When the sampling rod 9 rises to a preset high position, the rod body directly triggers the first limiting device 6, causing the motor 21 to be de-energized and limiting the high-position overtravel of the sampling rod 9. A second limiting device 7 is welded to the bottom surface of the car body 1. It adopts an arc-shaped buffer seat structure, with a buffer rubber layer pasted on the arc surface. When the sampling rod 9 descends to a preset low position, its bottom end directly abuts against the buffer rubber layer of the second limiting device 7. The impact energy is absorbed through rubber deformation, rigidly preventing the low-position overtravel of the sampling rod 9.

[0042] Reference Figure 1 and Figure 2A guide assembly 8 is provided on the same side of the vehicle body 1 as the outer sprocket assembly 233. The guide sleeve 81 of the guide assembly 8 is a cylindrical axially open structure, which is vertically fixed to the top of the side of the vehicle body 1 by welding. The curvature of its inner cylindrical surface is adapted to the outer diameter of the sampling rod 9. The axial opening allows the sampling rod 9 to be laterally inserted and guided to the roller assembly 82. The two roller assemblies 82 are located directly above and below the outer sprocket assembly 233, respectively. Each roller assembly 82 includes two rollers 821 symmetrical about the axis of the sampling rod 9. The rollers 821 have arc-shaped grooves adapted to the sampling rod 9.

[0043] The working process of the sampling trolley transmission device of this utility model is as follows:

[0044] After the motor 21 starts, the power is reduced and amplified by the reducer 22, and then transmitted to the driving sprocket 2311 of the inner sprocket group 231. The driving sprocket 2311 drives three driven sprockets 2312 to rotate synchronously through the transmission chain 2313. The driven sprockets 2312 drive the transmission shaft 232 to rotate, which in turn drives the first transmission chain 2331 and the second transmission chain 2332 of the outer sprocket group 233 to circulate. The clamping blocks 4 fixed to the outside of the two chains symmetrically clamp the sampling rod 9, causing it to rise and fall vertically. In the movement path of the sampling rod 9, the top end slides into the guide sleeve 81, the middle part first passes through the arc-shaped grooves of the two symmetrical rollers 821 of the upper roller group 82, then through the clamping area of ​​the clamping block 4, and finally through the arc-shaped grooves of the two symmetrical rollers 821 of the lower roller group 82, forming a multi-level guide structure of "top guidance + upper and lower roller constraint". During operation, the spring tensioner 5 automatically compresses the spring as the transmission chain 2313 relaxes, pushing the tension bracket to slide along the screw, and tensioning the chain in real time through the tension sprocket; when the sampling rod 9 rises or falls to the top or bottom of the car body 1, it triggers the first limit device 6 and the second limit device 7 respectively to limit the stroke and ensure that the range of motion is controllable.

[0045] The implementation principle of this utility model is as follows: This device uses a motor 21 as a power source. After being reduced in speed and increased in torque by a reducer 22, it drives the outer double chain through the chain transmission system of the inner sprocket group 231 via the transmission shaft 232 to the outer sprocket group 233. This drives the clamping block 4 to achieve the low-loss lifting and lowering movement of the sampling rod 9. At the same time, it relies on three major mechanisms to ensure operational performance: stable transmission, precise guidance, and safety limit. The symmetrical clamping of the double chain forms a force couple balance to avoid swaying. The spring tensioner 5 automatically compensates for chain slack to prevent chain jumps, together ensuring transmission stability. The guide assembly 8 restricts the swing of the top of the sampling rod 9 through the top guide sleeve 81. The upper and lower roller groups 82 fit the rod body with arc-shaped grooves, which not only restrains radial deviation but also reduces friction, ensuring the accuracy of linear motion. The first limit device 6 controls the high-position precise stop, and the second limit device 7 prevents the impact of descent through a buffer structure, together defining the safe stroke. Finally, the coordinated action of all parts effectively solves the problems of power loss, unstable transmission, guidance deviation, and overtravel risk, improving sampling accuracy and reliability.

[0046] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A sampling trolley transmission device comprising a trolley shell (1), the bottom surface of the trolley shell (1) is provided with four supports (3), characterized in that, The vehicle body (1) is equipped with a transmission device (2). The transmission device (2) includes a motor (21), a reducer (22) and a synchronous chain assembly (23). The output shaft of the motor (21) is connected to the input shaft of the reducer (22), and the output shaft of the reducer (22) drives the synchronous chain assembly (23) to circulate.

2. A drive for a sampling trolley according to claim 1, wherein, The synchronization chain assembly (23) includes an inner sprocket set (231), a drive shaft (232), and an outer sprocket set (233). The inner sprocket assembly (231) includes a drive sprocket (2311), a plurality of driven sprockets (2312) and a drive chain (2313). The drive sprocket (2311) is connected to the output end of the reducer (22), and the drive chain (2313) meshes with the drive sprocket (2311) and the plurality of driven sprockets (2312). One end of the drive shaft (232) is connected to the driven sprocket (2312), and the other end passes through the car body (1) and is connected to the outer sprocket group (233).

3. A drive for a sampling trolley according to claim 2, wherein, The outer sprocket assembly (233) includes a first transmission chain (2331) and a second transmission chain (2332) arranged symmetrically. The first transmission chain (2331) and the second transmission chain (2332) are both provided with clamping blocks (4), which are used to clamp the sampling rod (9).

4. A drive assembly for a sampling cart according to claim 2, wherein, The slack side of the transmission chain (2313) is engaged with a spring tensioner (5).

5. The sampling trolley transmission device according to claim 1, characterized in that, The top surface of the car body (1) is provided with a first limiting device (6), and the bottom surface of the car body (1) is provided with a second limiting device (7).

6. The sampling trolley transmission device according to claim 3, characterized in that, It also includes a guide assembly (8) on the same side as the outer sprocket assembly (233) and disposed on the side of the vehicle body (1), the guide assembly (8) including a guide sleeve (81) and two sets of roller assemblies (82). The guide sleeve (81) is disposed at the top side of the vehicle body (1); The two sets of roller groups (82) are respectively arranged vertically above and below the outer sprocket group (233). Each set of roller groups (82) includes two symmetrically arranged rollers (821). The rollers (821) have arc-shaped grooves that are adapted to the sampling rod (9).

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