A transmission shaft automatic connection and disconnection device and test equipment

Abstract

The present invention belongs to the technical field of testing wheels and automobile chassis suspension systems, and provides a transmission shaft automatic connection and disconnection device and testing equipment. The input shaft drives the transmission shaft to rotate and apply acceleration torque through a second connecting shaft, a ratchet assembly, a first connecting shaft, and an output shaft. The gears of the input shaft and the first connecting shaft can be fully engaged and fully separated through the extension and retraction of the piston rods of the first group of cylinders and the second group of cylinders, so that the power system intervenes when the drive shaft needs to be driven, and the power system is automatically cut off after the driving is completed. In addition, the ratchet assembly can prevent the transmission shaft from driving the motor in reverse.

Description

Technical Field

[0001] The present application relates to the technical field of testing wheels and automobile chassis suspension systems, and in particular to an automatic connection and disconnection device for a transmission shaft and testing equipment. Background Art

[0002] Some tests on road simulation test machines with suspension require the system to be accelerated first, and when the preset speed is reached, the acceleration torque is removed in order to conduct subsequent tests. However, the drive shaft in existing test equipment is an integrated design with the power system that applies the acceleration torque. It is often necessary to start the machine to apply the acceleration torque and shut down the machine to stop the acceleration torque. The drive shaft and the power system cannot be separated. In tests with multiple loading variables and multiple combined components, the power system will affect the accuracy of the entire test results, making it inconvenient to load multiple variables and to conduct coordinated tests of multiple components. In addition, if the speed of the drive shaft is higher than the speed of the power system, the power system may be damaged. At the same time, the power system will limit the loading of the acceleration torque and other variables, affecting the accuracy of the test results and failing to obtain true test results. Summary of the invention

[0003] The embodiments of the present application provide a transmission shaft automatic connection and disconnection device and a test device, which can solve the problems in the background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] In the first aspect, a transmission shaft automatic connection and disengagement device is provided, comprising an output shaft, a first connecting shaft, a ratchet assembly, a second connecting shaft, and an input shaft, wherein the upper end of the output shaft is connected to the transmission shaft, and the lower end of the output shaft is a gear structure; the upper end of the first connecting shaft is a gear structure, and the gear structure at the upper end of the first connecting shaft can mesh with the gear structure at the lower end of the output shaft; the lower end of the first connecting shaft is splined to the upper end of the ratchet assembly, and the upper end of the second connecting shaft is splined to the lower end of the ratchet assembly; the ratchet assembly can transmit the rotation of the second connecting shaft to the first connecting shaft, and prevent the rotation of the first connecting shaft from being transmitted to the second connecting shaft; the lower end of the second connecting shaft is connected to the input shaft, and the input shaft is used to input rotational power.

[0006] In some embodiments, the ratchet assembly includes a ratchet cover, a first baffle, a ratchet, a pawl, a first group of cylinders and a second group of cylinders, the first connecting shaft passes through the first baffle, and the lower end of the first connecting shaft and the ratchet are connected by a spline; a first connecting shaft shoulder is provided on the first connecting shaft, and a clamp is fixed on the first connecting shaft below the first connecting shaft shoulder, the first baffle is located between the first connecting shaft shoulder and the clamp, and the first baffle can rotate freely around the first connecting shaft; the first baffle and the top surface of the ratchet cover are fixedly connected together; the ratchet and the pawl are fixed in the ratchet cover, and the lower end of the ratchet cover and the second connecting shaft are connected by a spline; the positions of the first group of cylinders and the second group of cylinders are fixed, the first group of cylinders is located above the first baffle, and the second group of cylinders is located below the ratchet cover, the piston rod of the first group of cylinders can push the first baffle, and the piston rod of the second group of cylinders can push the ratchet cover.

[0007] In some embodiments, a second baffle is fixed to the bottom end of the first connecting shaft, a third baffle is fixed to the top end of the second connecting shaft, and a gap is left between the second baffle and the third baffle.

[0008] In some embodiments, the tops of the teeth of the gear structure at the upper end of the first connecting shaft and the gear structure at the lower end of the output shaft are both provided with chamfers.

[0009] In some embodiments, the number of cylinders in the first group of cylinders is the same as the number of cylinders in the second group of cylinders, both of which are 2-4, and are evenly distributed around the circumference and symmetrically installed up and down.

[0010] In some embodiments, a gap is left between the first baffle plate and the first connecting shaft in the radial direction, and a gap is left between the first baffle plate and the clamp and the shoulder of the first connecting shaft in the axial direction.

[0011] In some embodiments, the ratchet has 16-24 teeth, which are evenly distributed around the circumference; the ratchet has 2-4 pawls, which are evenly distributed around the circumference and installed in the ratchet cover.

[0012] In some embodiments, the spline length between the second connecting shaft and the ratchet cover and the spline length between the first connecting shaft and the ratchet can ensure that the gears between the first connecting shaft and the output shaft can be fully engaged and fully disengaged.

[0013] In a second aspect, an embodiment of the present application provides a test device, including a drive motor and an automatic connection and disconnection device for a transmission shaft as described in any of the above embodiments, wherein the output shaft of the drive motor is fixedly connected to the input shaft.

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

[0015] The present invention provides an automatic connection and disconnection device for a transmission shaft and a test equipment, comprising an output shaft, a first connecting shaft, a ratchet assembly, a second connecting shaft, and an input shaft. The input shaft drives the transmission shaft to rotate and apply an acceleration torque through the second connecting shaft, the ratchet assembly, the first connecting shaft, and the output shaft. The gears of the input shaft and the first connecting shaft can be fully meshed and fully separated by the extension and retraction of the piston rods of the first group of cylinders and the second group of cylinders of the ratchet assembly, so that the power system intervenes when the drive shaft needs to be driven, and the power system is automatically cut off after the driving is completed. The ratchet assembly can prevent the transmission shaft from driving the motor to work in reverse, and the first group of cylinders is used to push the first baffle, so that the first baffle and the first connecting shaft move relative to each other. The first connecting shaft drives the ratchet to rise in the ratchet cover, so that the ratchet pawl can be automatically disengaged to prevent the ratchet from excessive wear. The experimental equipment in the present application is convenient for loading tests of multiple variables and coordinated tests of multiple components, and the test results are highly accurate. At the same time, the drive shaft can be prevented from dragging the motor of the power system to rotate, thereby avoiding damage to the power system and affecting the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a structural schematic diagram of a transmission shaft automatic connection and disconnection device of the present application.

[0018] Figure 2 It is a schematic diagram of the assembly structure of a transmission shaft automatic connection and disconnection device of the present application.

[0019] Among them: 1-output shaft, 2-first connecting shaft, 3-first baffle, 4-clamp, 5-ratchet, 6-second baffle, 7-third baffle, 8-pawl, 9-ratchet cover, 10-second connecting shaft, 11-input shaft, 12-first group of cylinders, 13-second group of cylinders, 14-transmission shaft, 15-drive motor, 16-ratchet assembly, 17-shoulder of the first connecting shaft. DETAILED DESCRIPTION

[0020] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] Embodiment 1:

[0024] In this embodiment 1, a transmission shaft automatic connection and disconnection device is provided. Figure 1-2 As shown in , it includes an output shaft 1, a first connecting shaft 2, a first baffle 3, a ratchet assembly 16, a second connecting shaft 10, a collection shaft 11, a first group of cylinders 12, and a second group of cylinders 13. The upper end of the output shaft 1 is connected to the transmission shaft 14 (for example, the transmission shaft of the automobile suspension assembly), and the lower end of the output shaft 1 is a gear structure. The upper end of the first connecting shaft 2 is a gear structure, and the gear structure at the upper end of the first connecting shaft 2 can mesh with the gear structure at the lower end of the output shaft 1 for power transmission, such as Figure 1-2 As shown in , after the gear structure at the upper end of the first connecting shaft 2 is meshed with the gear at the lower end of the output shaft 1, the axes of the first connecting shaft 2 and the output shaft 1 coincide. The number of gear teeth of the gear structure at the upper end of the first connecting shaft 2 and the gear structure at the lower end of the output shaft 1 are both 8-16, and are evenly distributed along their respective circumferences, and the tops of the teeth of the gear structure at the upper end of the first connecting shaft 2 and the gear structure at the lower end of the output shaft 1 are both chamfered, so that the gears can be meshed together at any position.

[0025] In other embodiments, the gear structure at the upper end of the first connecting shaft and the gear at the lower end of the output shaft may also have different meshing transmission modes, such as internal meshing transmission, bevel gear transmission, herringbone gear transmission, spur gear transmission, etc.

[0026] The lower end of the first connecting shaft 2 is connected to the upper end of the ratchet assembly 16 via a spline, the upper end of the second connecting shaft 10 is connected to the lower end of the ratchet assembly 16 via a spline, and the lower end of the second connecting shaft 10 is connected to the upper end of the input shaft 11 via a spline. The spline connection allows the ratchet assembly 16 to move axially relative to the first connecting shaft 2 and the second connecting shaft 4 under the action of the cylinder. The ratchet assembly 16 can transmit the rotation of the second connecting shaft 4 to the first connecting shaft 2, and prevent the rotation of the first connecting shaft 2 from being transmitted to the second connecting shaft 4. The lower end of the second connecting shaft 10 is connected to the input shaft 11, and the input shaft 11 is used to input rotational power. In this embodiment, the output end of the drive motor 15 is connected to the input shaft 11, as shown in FIG. Figure 1-2 as shown in .

[0027] like Figure 2 As shown in , the ratchet assembly 16 includes a ratchet cover 9, a first baffle 3, a ratchet 5, a pawl 8, a first group of cylinders 12 and a second group of cylinders 13. The first connecting shaft 2 passes through the first baffle 3, and the lower end of the first connecting shaft 2 and the ratchet 5 are connected by a spline. A first connecting shaft shoulder 17 is provided on the first connecting shaft 2, and a clamp 4 is fixed on the first connecting shaft 2 below the first connecting shaft shoulder 17. The first baffle 3 is located between the first connecting shaft shoulder 17 and the clamp 4, and the first baffle 3 can rotate freely around the first connecting shaft 2. The first baffle 3 is fixed to the top surface of the ratchet cover 9 by bolts, and the pawl is installed on the inner side of the ratchet cover 9. The ratchet 5 and the pawl 8 are fixed in the ratchet cover 9. The ratchet 5 and the pawl 8 are used to prevent the transmission shaft 14 from dragging the drive motor 9 connected to the input shaft 11 to rotate. The lower end of the ratchet cover 9 and the second connecting shaft 10 are connected by a spline. The positions of the first group of cylinders 12 and the second group of cylinders 13 are fixed, the first group of cylinders 12 is located above the first baffle 3, the piston rod of the first group of cylinders 12 is not fixedly connected to the first baffle 3, the second group of cylinders 13 is located below the ratchet cover 16, the piston rod of the second group of cylinders 13 is not fixedly connected to the ratchet cover 16, the piston rod of the first group of cylinders 12 can push the first baffle 3, and the piston rod of the second group of cylinders 13 can push the ratchet cover 16.

[0028] The ratchet assembly 16 can transfer the rotation of the second connecting shaft 4 to the first connecting shaft 2, and because the first baffle 3 can rotate along the first connecting shaft 2, the rotation of the first connecting shaft 2 can be prevented from being transferred to the second connecting shaft 10. Figure 1-2 As shown in the figure, the first connecting shaft shoulder 17 is located on the first connecting shaft 2, the clamp 4 is fixed to the first connecting shaft 2 by bolts, and a gap is left between the first connecting shaft shoulder 17 and the clamp 4, so that the first baffle 3 can be installed smoothly and will not be clamped, so that the first baffle 3 will not be driven to rotate together when the first connecting shaft 2 rotates. The positions of the first group of cylinders 12 and the second group of cylinders 13 are fixed and are both fixed on the workbench.

[0029] The number of teeth of the ratchet 12 is 16-24, which are evenly distributed around the circumference. The number of the ratchet pawls 15 is 2-4, which are evenly distributed around the circumference. The second baffle 6 is fixed at the bottom end of the first connecting shaft 2 in the ratchet cover 9, and the second baffle 6 is used to prevent the ratchet 5 from falling off. The top end of the second connecting shaft 10 is fixed with a third baffle 7, and the third baffle 7 is used to prevent the upper end of the second connecting shaft 10 from falling off from the ratchet cover 9.

[0030] The number of cylinders in the first group of cylinders 12 is the same as the number of cylinders in the second group of cylinders 13, both of which are 2-4, and are evenly distributed around the circumference and symmetrically installed up and down. The first group of cylinders 13 acts on the first baffle 3, and the second group of cylinders 13 acts on the ratchet cover to achieve automatic connection and disconnection between the first connecting shaft 2 and the output shaft 1.

[0031] The cylinder strokes of the first group of cylinders 12 and the second group of cylinders 13 are 60-100 mm, and the cylinder strokes must be sufficient to allow the gears of the output shaft 1 and the first connecting shaft 2 to be fully engaged and fully separated. In order to avoid friction between the first baffle plate 3 and the first connecting shaft shoulder 17 and the clamp 4 on the first connecting shaft 2, a gap of, for example, 1-2 mm is left between the first connecting shaft shoulder 17 and the clamp 4 and the first baffle plate 3, and a gap of, for example, 1-2 mm is also left between the first baffle plate 3 and the first connecting shaft 2.

[0032] In this embodiment, a transmission shaft automatic connection and disconnection device is provided. When automatic connection is required, the second group of cylinders 13 is inflated, the first group of cylinders 12 is exhausted, the second group of cylinders 13 pushes the ratchet cover 9 to move upward, the ratchet cover 16 pushes the first baffle 3, the first baffle 3 drives the first connection shaft 2 to move upward by pushing the first connection shaft shoulder 17, so that the gear at the upper end of the first connection shaft 2 and the gear at the lower end of the output shaft 1 are meshed together. The driving motor 15 drives the input shaft 11 to rotate, the input shaft 11 drives the second connection shaft 10 to rotate, the second connection shaft 10 drives the ratchet cover 9 to work through the spline, the pawl 8 installed on the ratchet cover 9 drives the ratchet 5 to work, the ratchet 5 drives the first connection shaft 2 through the spline, the first connection shaft 2 drives the output shaft 1 through the gear, and the output shaft 1 drives the transmission shaft 14 to rotate.

[0033] When the second group of cylinders 13 pushes the ratchet cover 9, the upper end of the spline connecting the ratchet cover 9 and the second connecting shaft 10 is provided with a third baffle plate 7, so that the ratchet cover 9 will not fall off. When the first baffle plate 3 pushes the first connecting shaft 2, the bottom of the spline connecting the lower end of the first connecting shaft 2 and the ratchet 5 is fixed by the second baffle plate 6 to prevent the ratchet from slipping off.

[0034] The spline length between the second connecting shaft 10 and the input shaft 11 and the spline length between the first connecting shaft 2 and the ratchet 5 can ensure that the gears between the first connecting shaft 2 and the output shaft 1 can be fully engaged and fully disengaged with a certain margin.

[0035] After installation, a gap of 5-10 mm is left between the second baffle plate 6 and the third baffle plate 7 .

[0036] When the transmission system rotates, the whole system rotates synchronously. When the wheel reaches the preset speed, the drive motor 15 stops working, and the input shaft 11, the second connecting shaft 10, the ratchet cover 9, the pawl 8, and the third baffle 7 all stop rotating. At this time, since the first baffle 3 and the ratchet cover 9 are fixed together by bolts but there is a gap between them and the first connecting shaft 2, and there is a gap between the first baffle 3 and the first connecting shaft shoulder 17 and the clamp 4, the first baffle 10 also stops rotating and will not wear out with the rotating parts. At this time, the first group of cylinders 12 is inflated, and the second group of cylinders 13 is exhausted. The first group of cylinders 12 pushes the first baffle 3 to move downward, the first baffle 3 pushes the ratchet cover 9 to move downward, and the ratchet cover 9 pushes the second connecting shaft 10 to move downward. At the same time, the first baffle 10 drives the first connecting shaft 2 to move downward through the clamp 4, so that the gear between the first connecting shaft 2 and the output shaft 1 is automatically disengaged.

[0037] Example 2

[0038] In this embodiment 2, a test device is provided, including a drive motor and an automatic connection and disconnection device for a transmission shaft as described in the above embodiment 1, wherein the output shaft of the drive motor is fixedly connected to the input shaft. The test device in embodiment 2 implements the intervention of the power system when the drive shaft needs to be driven, automatically cuts off the power system after the drive is completed, and prevents the transmission shaft from driving the motor in reverse through the ratchet assembly. The experimental device in this application is convenient for loading tests of multiple variables and coordinated tests of multiple components, and the test results are highly accurate. At the same time, it can prevent the drive shaft from dragging the motor of the power system to rotate, thereby avoiding damage to the power system and affecting the accuracy of the test results.

[0039] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A transmission shaft automatic connection and disconnection device, characterized in that: It includes an output shaft, a first connecting shaft, a ratchet assembly, a second connecting shaft, and an input shaft, wherein the upper end of the output shaft is connected to the transmission shaft, and the lower end of the output shaft is a gear structure; The upper end of the first connecting shaft is a gear structure, and the gear structure at the upper end of the first connecting shaft can mesh with the gear structure at the lower end of the output shaft; the lower end of the first connecting shaft is connected to the upper end of the ratchet assembly through a spline, and the upper end of the second connecting shaft is connected to the lower end of the ratchet assembly through a spline; the ratchet assembly can transmit the rotation of the second connecting shaft to the first connecting shaft, and prevent the rotation of the first connecting shaft from being transmitted to the second connecting shaft; the ratchet assembly includes a ratchet cover, a first baffle, a ratchet, a pawl, a first group of cylinders and a second group of cylinders, the first connecting shaft passes through the first baffle, and the lower end of the first connecting shaft and the ratchet are connected by a spline; The first connecting shaft is provided with a first connecting shaft shoulder, and a clamp is fixed on the first connecting shaft below the first connecting shaft shoulder, the first baffle is located between the first connecting shaft shoulder and the clamp, and the first baffle can rotate freely around the first connecting shaft; The first baffle and the top surface of the ratchet cover are fixedly connected together; The ratchet and the pawl are fixed in the ratchet cover, and the lower end of the ratchet cover is connected to the second connecting shaft through a spline; The positions of the first group of cylinders and the second group of cylinders are fixed, the first group of cylinders is located above the first baffle, the second group of cylinders is located below the ratchet cover, the piston rods of the first group of cylinders can push the first baffle, and the piston rods of the second group of cylinders can push the ratchet cover; The lower end of the second connecting shaft is connected to the input shaft, and the input shaft is used to input rotational power.

2. The automatic connecting and disconnecting device for a transmission shaft according to claim 1, characterized in that: A second baffle is fixed to the bottom end of the first connecting shaft, a third baffle is fixed to the top end of the second connecting shaft, and a gap is left between the second baffle and the third baffle.

3. A transmission shaft automatic connection and disconnection device according to claim 1 or 2, characterized in that: The gear structure at the upper end of the first connecting shaft and the gear structure at the lower end of the output shaft are both provided with chamfers on their tooth tops.

4. A transmission shaft automatic connection and disconnection device according to claim 1 or 2, characterized in that: The number of cylinders in the first group of cylinders is the same as the number of cylinders in the second group of cylinders, both of which are 2-4, and are evenly distributed around the circumference and symmetrically installed up and down.

5. A transmission shaft automatic connection and disconnection device according to claim 1 or 2, characterized in that: A gap is left between the first baffle plate and the first connecting shaft in the radial direction, and a gap is left between the first baffle plate, the clamp and the shoulder of the first connecting shaft in the axial direction.

6. A transmission shaft automatic connection and disconnection device according to claim 1 or 2, characterized in that: The number of teeth of the ratchet is 16-24 and is evenly distributed around the circumference; the number of pawls is 2-4 and is evenly distributed around the circumference and installed in the ratchet cover.

7. A transmission shaft automatic connection and disconnection device according to claim 1 or 2, characterized in that: The spline length between the second connecting shaft and the ratchet cover and the spline length between the first connecting shaft and the ratchet can ensure that the gears between the first connecting shaft and the output shaft can be fully engaged and fully disengaged.

8. A test device, characterized in that: It comprises a driving motor and an automatic connecting and disconnecting device for a transmission shaft as described in any one of claims 1 to 7, wherein the output shaft of the driving motor is fixedly connected to the input shaft.

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