Harvesting machinery drive axle provided with speed measuring device

Abstract

The utility model discloses a harvesting machine drive axle provided with a speed measuring device, and belongs to the field of agricultural machinery. Comprising a left wheel edge assembly, a right wheel edge assembly, a transverse pull rod assembly, an oil cylinder assembly, a central transmission assembly, a half shaft shell and a speed measuring device. Half axle shells are symmetrically mounted on two sides of the central transmission assembly in sequence, oil cylinder assemblies are symmetrically mounted on two sides of the upper part of the central transmission assembly, the left and right oil cylinder assemblies are respectively connected with the left and right tie rod assemblies, and the left and right tie rod assemblies are respectively connected with the left and right wheel side assemblies; and speed measuring devices are symmetrically arranged on the shell on the two sides of the central transmission assembly. The two speed measuring devices are the same in structure. Two shaft circlips in the speed measuring device connect and fix a speed measuring gear on a transmission shaft through a spline, and a hex nut fixes a speed measuring sensor on a half shaft shell through a bolt. The distance between the end face of the speed measuring sensor and the tooth top of the speed measuring gear is 0.5-1 mm. The speed measuring device is simple and compact in structure, light and small in weight, convenient to install, safe and reliable.

Description

Technical Field

[0001] The utility model belongs to the field of agricultural machinery and relates to a harvesting machinery drive bridge, in particular to a harvesting machinery drive bridge equipped with a speed measuring device. Background Art

[0002] As we all know, harvesters are a crucial component of agricultural machinery. The drive axle, a crucial component of harvesters, is responsible for transmitting power to the drive wheels. In existing technology, a speed measuring device is typically integrated into the transmission section of the drive axle. Its function is to monitor the drive axle's speed in real time. The speed measuring device's sensor detects the speed of the drive axle's output shaft, providing data feedback to the harvester's control system. Combined with the hydraulic motor and transmission's shifting functions, the device automatically adjusts the transmission ratio based on the load, optimizing transmission efficiency. Furthermore, it can detect abnormal vibrations or speed fluctuations during operation, indicating maintenance needs and providing timely warnings. On harvesters, a speed measuring device is often installed at the transmission output end to directly monitor the drive wheel speed. This speed data is used to match the harvesting speed of different crops with the harvester's drum speed, thereby minimizing grain losses during operation. Combining the speed measuring device with electronically controlled hydraulic shifting enables stepless speed change and load adaptation. Monitoring data can also predict mechanical wear, extending the life of the drive axle. In short, the drive axle equipped with a speed measuring device optimizes the operating efficiency and stability of the harvesting machinery through real-time data feedback, which is especially advantageous under complex terrain and diverse crop conditions.

[0003] The National Intellectual Property Administration published an invention patent application on February 22, 2022, with application number 2020108434324, publication number CN 114074611 B, application date August 20, 2020, and classification number B60R. This patent application discloses a "vehicle speed measuring device and automobile wheel." The device comprises a suspension disc, a speed sensor, and a ring gear. The suspension disc is rotatably mounted in the center hole of the wheel. The suspension disc is provided with a counterweight component that deviates the center of mass of the suspension disc from its central axis, allowing it to remain stationary as the wheel rotates. One of the speed sensor and the ring gear is mounted in the suspension disc, while the other is mounted in the center hole of the wheel. The relatively rotating speed sensor and ring gear cooperate to measure vehicle speed. With this structure, when the wheel begins to rotate, the ring gear and speed sensor also rotate relative to each other, and their rotational speed is the same as that of the wheel. Thus, the ring gear and speed sensor cooperate to measure the vehicle's speed. This type of speed measuring device is used on road vehicles. For non-road vehicles such as harvesting machinery, it is appropriate to choose a speed measuring device that is directly installed on the axle housing to facilitate timely acquisition of speed measurement results.

[0004] Based on the above situation, through the current market demand survey of harvesting machinery, comprehensive user opinions and analysis of existing technologies, a speed measuring device with compact structure, easy installation, safe and reliable use is provided, which can be directly installed on the drive axle of the harvesting machinery. Tests have shown that it is completely feasible. Utility Model Content

[0005] The utility model aims to provide a harvesting machinery drive axle which is equipped with a speed measuring device and has the advantages of compact structure, convenient installation, safe and reliable use.

[0006] The utility model can achieve the above-mentioned purpose through the following technical solutions: a harvesting machinery drive axle equipped with a speed measuring device, comprising: a right wheel side assembly, a transverse tie rod assembly, a cylinder assembly, a central transmission assembly, a half-axle housing, a left wheel side assembly and a speed measuring device; the half-axle housings are symmetrically installed on both sides of the central transmission assembly, the right half-axle housing is installed at the outer end of the right wheel side assembly, and the left half-axle housing is installed at the outer end of the left half-axle housing; the cylinder assemblies are symmetrically installed on both sides of the upper part of the central transmission assembly, the right cylinder assembly is connected to the right transverse tie rod assembly, and the other end of the transverse tie rod assembly is connected to the right wheel side assembly; the left cylinder assembly is connected to the left transverse tie rod assembly, and the other end of the transverse tie rod assembly is connected to the left wheel side assembly; the speed measuring devices are symmetrically installed on the housings on both sides of the central transmission assembly.

[0007] The two speed measuring devices symmetrically installed on the housings on both sides of the central transmission assembly are exactly the same.

[0008] The speed measuring device includes: a speed sensor, a transmission shaft, a shaft elastic retaining ring, a speed measuring gear and a hexagonal nut; the two shaft elastic retaining rings fix the speed measuring gear on the transmission shaft through a spline connection, and the hexagonal nut fixes the speed sensor to the half-shaft housing through bolts.

[0009] The end face of the speed sensor and the tooth top of the speed gear are at a distance of 0.5 to 1 mm.

[0010] The beneficial effects achieved by the above-mentioned technical solution are as follows: the speed measuring device designed in the present invention can be directly mounted on the housing of the drive axle, which is more convenient and provides better performance than the prior art method of mounting it on the drive axle or transmission output shaft. In particular, the speed measuring device has a simpler and more compact structure than the prior art, is lighter in weight, easier to install, and safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of a harvesting machinery drive axle equipped with a speed measuring device according to the present invention;

[0012] Figure 2 for Figure 1 Schematic diagram of the enlarged structure of site I.

[0013] In the figure: 1 right wheel assembly, 2 tie rod assembly, 3 cylinder assembly, 4 central transmission assembly, 5 half-shaft housing, 6 left wheel assembly, 7 speed sensor, 8 drive shaft, 9 shaft circlip, 10 speed gear, 11 hexagonal nut; Ⅰ speed measuring device. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1-2 As shown, a harvesting machinery drive axle equipped with a speed measuring device includes: a right wheel assembly 1, a tie rod assembly 2, a cylinder assembly 3, a central transmission assembly 4, a half-axle housing 5, a left wheel assembly 6 and a speed measuring device I; wherein the speed measuring device I includes: a speed sensor 7, a transmission shaft 8, a shaft elastic circlip 9, a speed measuring gear 10 and a hexagonal nut 11.

[0015] In this embodiment, the overall design of the drive axle is a symmetrical structure. With the central transmission assembly 4 as the center, half-axle housings 5 ​​are symmetrically installed on both sides. The right half-axle housing 5 is installed with the right wheel side assembly 1 on the outer end, and the left half-axle housing 5 is installed with the left wheel side assembly 6 on the outer end; the cylinder assemblies 3 are symmetrically installed on both sides of the upper part of the central transmission assembly 4, the right cylinder assembly 3 is connected to the right transverse tie rod assembly 2, and the other end of the transverse tie rod assembly 2 is connected to the right wheel side assembly 1; similarly, the left cylinder assembly 3 is connected to the left transverse tie rod assembly 2, and the other end of the transverse tie rod assembly 2 is connected to the left wheel side assembly 6; self-designed speed measuring devices I are symmetrically installed on the housings on both sides of the central transmission assembly 4, and the two symmetrically installed speed measuring devices I are exactly the same in structure.

[0016] Speed ​​measuring device I includes a speed sensor 7, a transmission shaft 8, a shaft circlip 9, a speed gear 10, and a hexagonal nut 11. The two shaft circlips 9 in speed measuring device I secure the speed gear 10 to the transmission shaft 8 via a spline connection. The hexagonal nut 11 bolts the speed sensor 7 to the axle housing 5. The end face of the speed sensor 7 should be 0.5-1 mm away from the tooth top of the speed gear 10, ensuring no interference.

[0017] During operation, as the speed measuring gear 10 in speed measuring device I rotates, the magnetic field uniformly distributed around the circumferential tooth tips of speed measuring gear 10 changes, affecting the induced voltage of the receiving coil in speed sensor 7. The output signal is transmitted to the encoder of the accompanying host machine, thereby achieving the purpose of speed measurement. The drive axle is driven by inputting power to the input flange, which drives the spiral bevel gear in the central transmission assembly 4. The power is then transmitted through the differential via the drive shafts 8 at both ends to the left and right wheel assemblies 6 and 1, respectively, to rotate the wheels.

[0018] The speed measuring device designed in the utility model can be directly installed on the housing of the drive axle. In particular, the structural structure of the speed measuring device is simpler and more compact than that of the prior art, and is lighter in size, easier to install, and safer and more reliable.

[0019] The practical application of the present invention is not limited to the situation described in this example. All technical solutions and improvements that do not deviate from the essential content of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A harvesting machinery drive axle equipped with a speed measuring device, comprising: The invention comprises a right wheel side assembly (1), a tie rod assembly (2), an oil cylinder assembly (3), a central transmission assembly (4), a half-axle housing (5), a left wheel side assembly (6) and a speed measuring device (I); the invention is characterized in that: the half-axle housings (5) are symmetrically installed on both sides of the central transmission assembly (4), the right half-axle housing (5) is installed with the right wheel side assembly (1) at its outer end, and the left half-axle housing (5) is installed with the left wheel side assembly (6) at its outer end; the oil cylinder assembly (3) is symmetrically installed on both sides of the upper part of the central transmission assembly (4), the right oil cylinder assembly (3) is connected to the right tie rod assembly (2), and the other end of the tie rod assembly (2) is connected to the right wheel side assembly (1); the left oil cylinder assembly (3) is connected to the left tie rod assembly (2), and the other end of the tie rod assembly (2) is connected to the left wheel side assembly (6); and the speed measuring devices (I) are symmetrically installed on the housings on both sides of the central transmission assembly (4).

2. The harvesting machinery drive axle equipped with a speed measuring device according to claim 1, characterized in that: The two speed measuring devices (I) symmetrically mounted on the housings on both sides of the central transmission assembly (4) are identical.

3. The harvesting machinery drive axle equipped with a speed measuring device according to claim 1, characterized in that: The speed measuring device (I) comprises: a speed sensor (7), a transmission shaft (8), a shaft elastic retaining ring (9), a speed measuring gear (10) and a hexagonal nut (11); the two shaft elastic retaining rings (9) fix the speed measuring gear (10) to the transmission shaft (8) through a spline connection, and the hexagonal nut (11) fixes the speed sensor (7) to the half-shaft housing (5) through a bolt.

4. The harvesting machinery drive axle equipped with a speed measuring device according to claim 3, characterized in that: The end face of the speed sensor (7) and the tooth top of the speed measuring gear (10) are at a distance of 0.5 to 1 mm.

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