Torque detection device for concrete mixer

Abstract

The utility model relates to a torque detection device for a concrete mixer, which relates to the technical field of mixer torque detection and comprises a substrate, first, second, third and fourth support tables fixedly mounted on the substrate, a transmission shaft mounted on the first support table, a chuck fixedly mounted at one end of the transmission shaft, and a driving gear fixedly sleeved at the other end of the transmission shaft. A first driven gear and a second driven gear which are in transmission fit are arranged in the second supporting table, a third driven gear is rotationally installed in the third supporting table, an output shaft is arranged in the fourth supporting table, and the end of the outer side of the output shaft is in transmission connection with a loader. According to the utility model, manual detection by an operator is not needed, a standard load force can be applied, the accuracy of detection data is improved, errors are reduced, manpower consumed by torque detection can be effectively reduced, and the detection efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of mixer torque detection technology, and specifically discloses a torque detection device for concrete mixers. Background Technology

[0002] A concrete mixer is mainly used to mix cement, sand, aggregate, and water to produce concrete. Its main components include a mixing drum, feeding and discharging mechanisms, a water supply system, a prime mover, a transmission mechanism, a frame, and support devices. The transmission mechanism of the concrete mixer contains a drive shaft, whose main function is to transmit the power generated by the motor to the mixing shaft, thereby accelerating the mixing of concrete.

[0003] Before operating a concrete mixer, on-site personnel need to conduct a pre-operation inspection to ensure its normal operation. As the main transmission structure in the concrete mixer, the drive shaft's torque must be within the standard range. Torque testing the drive shaft can detect overload conditions, preventing safety hazards such as deformation or breakage due to overload. Currently, operators typically use a torque wrench to test the drive shaft torque. The operator holds the torque wrench, ensuring an interference fit between the wrench's opening and the drive shaft, and then forcefully rotates the wrench to measure the torque. As this existing technology shows, testing the drive shaft torque of a concrete mixer requires entirely manual operation, with repeated force applied to the handheld end of the torque wrench to obtain multiple data points for later verification and comparison. It is evident that existing technologies generally suffer from errors in actual operation due to the difficulty in precisely controlling the applied force manually. These errors are typically within ±3%. Furthermore, the diameter of the drive shaft of a concrete mixer is generally between 80mm and 120mm, making manual torque detection labor-intensive and difficult to improve detection efficiency. Utility Model Content

[0004] To address the issues of low accuracy and high manpower consumption in current torque detection processes for concrete mixers, this invention provides a torque detection device for concrete mixers.

[0005] To solve the above problems, this utility model provides the following technical solution:

[0006] A torque detection device for a concrete mixer includes a base plate on which a first support platform, a second support platform, a third support platform, and a fourth support platform are fixedly mounted. A drive shaft is rotatably mounted on the first support platform. A chuck that is fastened to the drive shaft of the concrete mixer is fixedly mounted on one end of the drive shaft, and a drive gear is fixedly fitted on the other end of the drive shaft. A first driven gear and a second driven gear are provided in the second support platform, which mesh with the drive gear. A third driven gear that meshes with the second driven gear is rotatably mounted in the third support platform. An output shaft that meshes with the third driven gear is provided in the fourth support platform, and a load cell is connected to the outer end of the output shaft.

[0007] Preferably, the drive shaft is fitted with a rotatably fitted bushing, and a clamping ring is fixedly fitted on the outside of the bushing, the clamping ring being fastened to the first support platform.

[0008] Preferably, the outer surface of the chuck has multiple slots, which are symmetrically arranged on both sides of the drive shaft, and inserts are fixedly installed on the slot surfaces.

[0009] Preferably, a first gear shaft and a second gear shaft arranged in parallel are rotatably installed inside the second support platform. The first driven gear and the second driven gear are respectively fixedly mounted on the outer wall of the first gear shaft and the second gear shaft. A first transmission gear is also fixedly mounted on the outer wall of the first gear shaft. The first transmission gear meshes with the second driven gear for transmission. A second transmission gear is also fixedly mounted on the outer wall of the second gear shaft. The second transmission gear meshes with the third driven gear for transmission.

[0010] Preferably, a third gear shaft is rotatably mounted inside the third support platform, the third driven gear is fixedly fitted on the outer wall of the third gear shaft, a first pulley is also fixedly fitted on the outer wall of the third gear shaft, a second pulley is fixedly fitted on the outer wall of the output shaft, and a belt is fitted together between the first pulley and the second pulley.

[0011] Preferably, the outer diameter of the first driven gear is the same as that of the second and third driven gears, the outer diameter of the first driven gear is larger than that of the first transmission gear, and the outer diameter of the first transmission gear is the same as that of the second transmission gear.

[0012] Preferably, both the first and second pulleys are provided with multiple stepped platforms with gradually decreasing outer diameters, and the belt is wound around the stepped surfaces of the platforms. The first and second pulleys are arranged symmetrically.

[0013] Preferably, the load is fastened to the base plate via a support plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The drive shaft in this invention can be coupled with the drive shaft of a concrete mixer. The driving force of the drive shaft is transmitted to the output shaft via a first driven gear, a second driven gear, and a third driven gear through a driving gear. A load cell provides load to the output shaft and gradually feeds it back to the drive shaft, thus providing loads with various parameters for the drive shaft. This facilitates the detection of the output torque of the drive shaft under different loads, thereby determining whether the drive shaft meets the standards for normal operation of the concrete mixer. This invention eliminates the need for manual inspection by operators and can apply standard load forces, improving the accuracy of the test data and reducing errors. It also effectively reduces the manpower required for torque testing, further improving testing efficiency. Therefore, it has a very broad application prospect. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall device structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the chuck structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the first transmission gear and the second transmission gear of this utility model;

[0020] Figure 4 This is a schematic diagram of the installation structure of the first and second belt pulleys of this utility model;

[0021] In the diagram: 1. Base plate, 2. First support platform, 3. Second support platform, 4. Third support platform, 5. Fourth support platform, 6. Drive shaft, 7. Chuck, 8. Drive gear, 9. First driven gear, 10. Second driven gear, 11. Third driven gear, 12. Output shaft, 13. Load cell, 14. Bushing, 15. Clamping ring, 16. Slot, 17. Insert, 18. First gear shaft, 19. Second gear shaft, 20. First transmission gear, 21. Second transmission gear, 22. Third gear shaft, 23. First pulley, 24. Second pulley, 25. Belt, 26. Ladder, 27. Support plate. Detailed Implementation

[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] This specific embodiment provides a torque detection device for a concrete mixer, such as... Figures 1-4 As shown, the system includes a base plate 1, which can be fixedly installed by operators within the testing area of ​​a concrete mixer. A first support platform 2, a second support platform 3, a third support platform 4, and a fourth support platform 5 are fixedly installed on the base plate 1. The first support platform 2 has a square structure, with two clamping rings 15 fixedly installed at its bottom. Both sides of the clamping rings 15 are tightly connected to the first support platform 2. A bushing 14 is fixedly fitted inside both clamping rings 15, with the outer wall of the bushing 14 in close contact with the inner wall of the clamping rings 15. A rotatably engaging drive shaft 6 is provided inside the bushing 14, with the outer wall of the drive shaft 6 rotatably engaging with the inner wall of the bushing 14. One end of the drive shaft 6 faces the concrete mixer drive shaft outside the base plate 1, and the other end faces the second support platform 3.

[0024] A chuck 7 is fixedly installed on one end of the drive shaft 6 facing the drive shaft of the concrete mixer. The chuck 7 is arranged on the outside of the clamping ring 15. Two slots 16 are formed on the outer surface of the chuck 7. The two slots 16 are concave grooves and are symmetrically arranged on both sides of the drive shaft 6. The slots 16 can engage with the locking blocks at the end of the drive shaft of the concrete mixer, thereby fastening the drive shaft 6 to the drive shaft. An insert 17 is fixedly installed on the groove surface of each slot 16. The height of the insert 17 is greater than the depth of the slot 16. The insert 17 can be inserted into the groove on the end face of the drive shaft, thereby enhancing the stability of the connection between the drive shaft 6 and the drive shaft and preventing disconnection or detachment during torque detection.

[0025] A drive gear 8 is fixed to one end of the drive shaft 6 facing the second support platform 3. A first gear shaft 18 and a second gear shaft 19 are rotatably mounted inside the second support platform 2, arranged in parallel. Both ends of the first gear shaft 18 and the second gear shaft 19 are rotatably engaged with the side plates of the second support platform 3. The first gear shaft 18 and the second gear shaft 19 are arranged at the same height. A first driven gear 9 and a second driven gear 10 are respectively fixedly mounted on the outer walls of the first gear shaft 18 and the second gear shaft 19. A first transmission gear 20 is also fixedly mounted on the outer wall of the first gear shaft 18, arranged to the side of the first driven gear 9. The first driven gear 9 meshes with the drive gear 8, and the first transmission gear 20 meshes with the second driven gear 10. A second transmission gear 2 is also fixedly mounted on the outer wall of the second gear shaft 19. By setting the transmission structure of the gear shafts and driven gears, the power output from the drive shaft can be transmitted sequentially between the various gear shafts.

[0026] A third gear shaft 22 is rotatably mounted inside the third support platform 4. A third driven gear 11 is fixedly fitted on the outer wall of the third gear shaft 22. The third driven gear 11 meshes with the second transmission gear 21 for transmission. The second gear shaft 19 can drive the third gear shaft 22 to rotate together. A first pulley 23 is also fixedly fitted on the outer wall of the third gear shaft 22. A rotatable output shaft 12 is provided inside the fourth support platform 5. A second pulley 24 is fixedly fitted on the outer wall of the output shaft 12. A belt 25 is fitted together between the first pulley 23 and the second pulley 24. By setting the cooperative structure of the first pulley 23 and the second pulley 24, the power output by the drive shaft can be gradually transmitted to the output shaft 12.

[0027] In this configuration, the first driven gear 9 has the same outer diameter as the second driven gear 10 and the third driven gear 11. The outer diameter of the first driven gear 9 is larger than that of the first transmission gear 20, and the outer diameter of the first transmission gear 20 is the same as that of the second transmission gear 21. By setting the first transmission gear 20 and the second transmission gear 21 to have smaller outer diameters, the loss of driving force during transmission between the gear shafts can be reduced, thus helping to improve detection accuracy.

[0028] Furthermore, both the first pulley 23 and the second pulley 24 are equipped with multiple stepped platforms 26 with gradually decreasing outer diameters. The belt 25 is wound around the stepped surfaces of the platforms 26, and the first pulley 23 and the second pulley 24 are arranged symmetrically. Operators can control the contact area between the first pulley 23, the second pulley 24, and the belt 25 according to testing needs, thereby facilitating the adjustment of input and output resistance and increasing the flexibility of torque detection.

[0029] A support plate 27 is fixedly installed on the side of the fourth support platform 5, and a load cell 13 is fixedly installed on the top of the support plate 27. The outer end of the output shaft 12 is connected to the input shaft of the load cell 13 via a coupling. A data transmission line is provided on the load cell 13. By setting the load cell 13, an adjustable load can be provided to the output shaft 12, providing a corresponding load value for the driving force of the concrete mixer drive shaft, thereby facilitating the detection of the rotational speed parameters of the concrete mixer drive shaft under this load.

[0030] The working principle of this utility model is as follows:

[0031] The operator can connect the output shaft 12 to the drive shaft of the concrete mixer. After starting the concrete mixer, the drive shaft rotates at a constant speed under the drive of its motor. The drive shaft can transmit its driving force to the output shaft 12 in sequence through the driving gear 8, the first driven gear 9, the second driven gear 10, and the third driven gear 11. At this time, the operator can provide a load to the output shaft 12 through the load device 13, so as to facilitate the detection of the output torque of the drive shaft under the load and gradually increase the load parameters to obtain the output torque of the drive shaft under various load conditions. The operator can compare the detection data with the standard parameters to determine whether the drive shaft meets the standard for normal operation of the concrete mixer.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A torque detection device for a concrete mixer, comprising a base plate (1), characterized in that, The base plate (1) is fixedly mounted with a first support platform (2), a second support platform (3), a third support platform (4), and a fourth support platform (5). A drive shaft (6) is rotatably mounted on the first support platform (2). A chuck (7) that is fastened to the drive shaft of a concrete mixer is fixedly mounted on one end of the drive shaft (6). A drive gear (8) is fixedly mounted on the other end of the drive shaft (6). A first driven gear (9) and a second driven gear (10) are provided in the second support platform (3) for transmission cooperation. The first driven gear (9) meshes with the drive gear (8) for transmission. A third driven gear (11) that is transmission cooperation with the second driven gear (10) is rotatably mounted in the third support platform (4). An output shaft (12) that is transmission cooperation with the third driven gear (11) is provided in the fourth support platform (5). A load cell (13) is connected to the outer end of the output shaft (12).

2. The torque detection device for a concrete mixer according to claim 1, characterized in that, The drive shaft (6) is fitted with a rotating bushing (14), and a clamping ring (15) is fixedly fitted on the outside of the bushing (14). The clamping ring (15) is fastened to the first support platform (2).

3. The torque detection device for a concrete mixer according to claim 1, characterized in that, The outer surface of the chuck (7) is provided with a plurality of slots (16), which are symmetrically arranged on both sides of the drive shaft (6), and inserts (17) are fixedly installed on the slot surface of the slots (16).

4. The torque detection device for a concrete mixer according to claim 1, characterized in that, The second support platform (3) is rotatably mounted with a first gear shaft (18) and a second gear shaft (19) arranged in parallel. The first driven gear (9) and the second driven gear (10) are respectively fixedly mounted on the outer walls of the first gear shaft (18) and the second gear shaft (19). A first transmission gear (20) is also fixedly mounted on the outer wall of the first gear shaft (18). The first transmission gear (20) meshes with the second driven gear (10) for transmission. A second transmission gear (21) is also fixedly mounted on the outer wall of the second gear shaft (19). The second transmission gear (21) meshes with the third driven gear (11) for transmission.

5. The torque detection device for a concrete mixer according to claim 1, characterized in that, A third gear shaft (22) is rotatably installed inside the third support platform (4). The third driven gear (11) is fixedly mounted on the outer wall of the third gear shaft (22). A first pulley (23) is also fixedly mounted on the outer wall of the third gear shaft (22). A second pulley (24) is fixedly mounted on the outer wall of the output shaft (12). A belt (25) is mounted between the first pulley (23) and the second pulley (24).

6. The torque detection device for a concrete mixer according to claim 1, characterized in that, The outer diameter of the first driven gear (9) is the same as that of the second driven gear (10) and the third driven gear (11). The outer diameter of the first driven gear (9) is larger than that of the first transmission gear (20). The outer diameter of the first transmission gear (20) is the same as that of the second transmission gear (21).

7. The torque detection device for a concrete mixer according to claim 5, characterized in that, The first belt pulley (23) and the second belt pulley (24) are each provided with a plurality of stepped platforms (26) with gradually decreasing outer diameters. The belt (25) is wound around the stepped surface of the stepped platform (26). The first belt pulley (23) and the second belt pulley (24) are arranged symmetrically.

8. The torque detection device for a concrete mixer according to claim 1, characterized in that, The load (13) is fastened to the base plate (1) via a support plate (27).

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