A safe and efficient protective railing for chassis dynamometers

Abstract

This invention belongs to the technical field of auxiliary equipment for automotive bench performance testing, specifically relating to a safe and efficient protective barrier for a chassis dynamometer. It includes two uprights supporting the barrier, each with a reversing pulley. The lower end of each upright is mounted on a base. A trip motor is installed on the barrier, with both ends of a trip rope connected to the two bases. The trip rope passes through the reversing pulley and connects to the trip motor. A reset motor is located on the ground, with one end of a reset rope connected to the upper end of the barrier and the lower end connected to the reset motor. A controller is electrically connected to both the trip motor and the reset motor. This chassis dynamometer protective barrier can accommodate vehicles of varying widths and provides sufficient distance for test personnel, ensuring easy access to and from the vehicle. In emergencies, the barrier automatically opens, providing ample space for personnel to respond and escape, thus improving emergency response efficiency.

Description

Technical Field

[0001] This invention belongs to the technical field of auxiliary equipment for automotive bench performance testing, specifically relating to a safe and efficient protective railing for a chassis dynamometer. Background Technology

[0002] Chassis dynamometers are commonly used and essential equipment in automotive bench performance testing. Tests such as vehicle power, fuel economy, and emissions are all conducted on chassis dynamometers. Due to varying test conditions, the speed varies, sometimes reaching 160 km / h or even higher. The rapidly rotating wheels pose a significant danger, therefore chassis dynamometers are equipped with guardrails to prevent injuries from flying debris. Because the width of a chassis dynamometer is fixed, and different vehicles have different wheelbases, the guardrails may obstruct the smooth opening of doors on some wider vehicles.

[0003] Most existing chassis dynamometer guardrails are fixedly installed, mounted on the chassis dynamometer floor via posts, with a fixed distance between them and the dynamometer rollers. Fixed guardrails cannot accommodate vehicles of varying widths, causing some wider vehicles' doors to be obstructed when opening, preventing them from fully opening. The narrow space makes it difficult for test personnel to get in and out of the vehicle. In emergencies (such as when the test vehicle catches fire under harsh testing conditions), this further hinders the efficiency of emergency escape for test personnel, potentially leading to unimaginable consequences. Summary of the Invention

[0004] The purpose of this invention is to provide a safe and efficient protective barrier for a chassis dynamometer. This barrier can adapt to vehicles of different widths, will not obstruct the opening of vehicle doors, and thus will not affect the emergency escape efficiency of test personnel, thereby solving the problems existing in the background art.

[0005] To achieve the above objectives, this application employs the following technical solution:

[0006] A safe and efficient chassis dynamometer guardrail includes a guardrail, two uprights supporting the guardrail, a reversing pulley on each upright, and the lower end of each upright mounted on a base. A trip motor is installed on the guardrail between the two uprights, with both ends of a trip rope connected to the base and then connected to the output shaft of the trip motor via the reversing pulley. A reset motor is located on the ground, with one end of a reset rope connected to the upper end of the guardrail and the lower end connected to the output shaft of the reset motor. A controller is connected to both the trip motor and the reset motor via electrical signals.

[0007] Furthermore, the reversing pulley is positioned at the center of the guardrail in the height direction, and the tripping motor is positioned below the height of the reversing pulley.

[0008] Furthermore, a support column extending into the ground is provided below the base, and the upper end of the support column is fixedly connected to the base.

[0009] Furthermore, the two bases have the same structure.

[0010] Furthermore, the base includes an upper base plate, a lower base plate, and a side base plate. The lower base plate and the side base plate are fixedly connected. The rear sides of the upper base plate and the lower base plate are connected by a hinge. A spring is provided between the upper base plate and the lower base plate. A latch mounting groove is provided on the upper base plate. The latch is installed in the latch mounting groove through a rotating shaft. A release rope is connected to the latch. A forward-protruding locking tongue is provided on the front side of the lower base plate. The locking tongue and the latch are movably engaged. The lower end of the column is fixed to the upper base plate.

[0011] Furthermore, the latch includes a connecting part and a locking hook fixedly disposed below the connecting part, the locking hook engaging with the locking tongue.

[0012] Furthermore, a limiting protrusion extending toward the upper base plate is provided on the side of the base side plate opposite to the upper base plate. The front side of the limiting protrusion is an inclined surface, which interferes with the movement trajectory of the upper base plate.

[0013] Furthermore, an opening groove is provided on the rear side of the upper plate of the base, and the lower end of the limiting device is fixed to the lower plate of the base after passing through the opening groove.

[0014] Furthermore, the angle between the axial centerline of the limiting device and the axial centerline of the column is an acute angle.

[0015] Furthermore, the axial centerline of the limiting device is not parallel to the base side plate.

[0016] The beneficial effects of this invention are:

[0017] The chassis dynamometer guardrail of this technical solution can adapt to vehicles of different widths and provide sufficient distance for test personnel to ensure convenient access to and from the vehicle. In case of emergency, the guardrail can be automatically opened to provide sufficient space for test personnel to respond to emergencies and escape, thereby improving emergency response efficiency. It is also simple to operate, efficient and safe. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall protective railing of the chassis dynamometer of the present invention.

[0019] Figure 2 This is a schematic diagram of the bottom connection of the protective railing of the chassis dynamometer of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Guardrail; 2. Release motor; 3. Reversing pulley; 4. Release rope; 5. Controller; 6. Base; 7. Reset motor; 8. Reset rope; 9. Post; 10. Base upper plate; 11. Lock mounting slot; 12. Base lower plate; 13. Lock; 14. Lock tongue; 15. Spring; 16. Base side plate; 17. Limiting device. Detailed Implementation

[0022] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, and should not be construed as limiting the technical solution of the present invention.

[0023] In the technical solution of this application, all terms indicating direction do not represent actual locations, but are only used to clearly explain the technical solution. Those skilled in the art can make appropriate selections according to actual needs.

[0024] Please see Figure 1 and Figure 2 As shown, this application provides a safe and efficient chassis dynamometer guardrail, including guardrail 1. This application does not have any special restrictions on the guardrail, which can be made of a frame and wire mesh or steel bars set in the frame. The specific shape can be designed by those skilled in the art according to the actual location and needs.

[0025] The guardrail 1 of this application is supported by two posts 9. The upper part of the two posts 9 is fixedly connected to the guardrail 1, and the lower end of the two posts 9 is respectively installed on a base 6, and the two bases have the same structure.

[0026] like Figure 2 As shown, the base 6 of this application includes a base upper plate 10, which is generally rectangular. An opening slot (not shown in the figure) is provided on the rear side of the base upper plate. A latch mounting slot 11 is provided on the upper surface of the base upper plate near the front side. The latch mounting slot 11 is generally frame-shaped. A pivot mounting hole (not shown in the figure) is provided on each of the two side walls of the latch mounting slot 11. The latch 13 is installed in the latch mounting slot 11 through the pivot, and the latch 13 can rotate on the pivot. The upper crossbeam of the latch mounting slot 11 serves to limit the latch 13.

[0027] The latch 13 of this application includes a connecting part and a latch hook fixedly disposed below the connecting part. The connecting part is a rectangular parallelepiped structure. The latch hook is fixed below the connecting part, wherein the pivot passes through the rear end of the connecting part. When the front end of the connecting part is lifted upward, the latch hook moves outward and upward in an arc shape. When the connecting part is pressed downward, the connecting part is limited by the crossbeam on the latch mounting slot, which drives the latch hook to move in the opposite direction.

[0028] The base 6 of this application includes a base lower plate 12 and a base side plate 16. The base side plate 16 is fixedly connected to the base lower plate 12. A support column extending into the ground is provided below the base and is fixedly connected to the ground. The specific fixing method is the prior art. The upper end face of the support column is fixedly connected to the lower surface of the base lower plate.

[0029] In the technical solution of this application, the rear side of the lower base plate 12 is provided with an upwardly extending side flange (not shown in the figure), making the lower base plate generally L-shaped. The side flange and the upper base plate are hinged together by a hinge device, thus maintaining a set distance between the upper base plate 10 and the lower base plate 12. A spring 15 is provided between the upper base plate 10 and the lower base plate 12. When the guardrail is not tilted outward, the spring 15 remains in a compressed state. Furthermore, a small gap is maintained between the side of the upper base plate and the side plate of the base.

[0030] In this application, a forward-protruding locking tongue 14 is provided on the front side of the base lower plate. The locking tongue is used to engage with the locking hook. The specific engagement and disengagement are described below.

[0031] In this application, a limiting protrusion extending towards the upper base plate is provided on the side of the base side plate opposite to the upper base plate. The front side of the limiting protrusion is inclined and interferes with the movement trajectory of the upper base plate. Specifically, when the guardrail flips outward, the upper base plate flips outward. When it flips to a certain angle, the limiting protrusion blocks the upper base plate from continuing to flip outward. The surface of the limiting protrusion that contacts the upper base plate when it is limiting the upper base plate is inclined, so as to maximize the limitation of the upper base plate.

[0032] In this application, a limiting device 17 is also provided on the base. The lower end of the limiting device is fixed to the lower plate of the base, and the limiting device is located in the opening groove of the upper plate of the base. In this way, when the upper plate of the base is turned outward to a certain angle, the limiting device simultaneously limits it to prevent the upper plate of the base from twisting due to the weight of the guardrail. The angle between the axial centerline of the limiting device and the axial centerline of the column in this application is an acute angle. At the same time, the axial centerline of the limiting device is not parallel to the side plate of the base, and the limiting device contacts the side protrusion of the lower plate of the base, which serves to fix the limiting device.

[0033] In this application, a reversing pulley 3 is provided on each post 9. The reversing pulley 3 is located at or above the center of the height direction of the guardrail to improve the efficiency of the release. The lower end of the post is vertically fixed to the upper plate of the base. A release motor 2 is installed between the two posts of the guardrail, and the installation position of the release motor 2 is lower than the height of the reversing pulley 3. The two ends of the release rope 4 are respectively connected to the outer end of the connecting part of a lock 13. The release rope is connected to the output shaft of the release motor after passing through the reversing pulley. When the release motor rotates forward or reverse, it is used to tighten or loosen the release rope. Moreover, when tightening the release rope, the release rope between the reversing pulley and the connecting part forms an acute angle with the horizontal axis of the connecting part. Such tension causes an outward force at the lock hook, which facilitates the lock hook to disengage from the lock tongue.

[0034] In this application, the reset motor 7 is mounted on the ground, the upper end of the reset rope 8 is connected to the upper end of the guardrail, and the lower end of the reset rope 8 is connected to the output shaft of the reset motor for resetting the guardrail when it is turned outward. The reset rope and the release rope are located on opposite sides of the guardrail. The controller 5 is electrically connected to both the release motor and the reset motor.

[0035] Working principle:

[0036] The tripping mechanism of this application includes two modes: manual control and automatic control.

[0037] The manual control tripping method is as follows:

[0038] When there is insufficient space between the guardrail and the vehicle and more space is needed, the controller can be manually operated to control the release motor. The release motor pulls the release rope, causing the latch to rotate upward and outward in an arc shape and release from the locking tongue. When released, the base plate is subjected to the elastic force of the spring, and the base plate and the guardrail as a whole flip outward. When it flips to a certain angle, the limit device and the limit protrusion limit the base plate. When the controller controls the release motor to act, it also controls the reset motor to act, releasing the reset rope to accommodate the flipping of the guardrail.

[0039] The automatic tripping control method is as follows:

[0040] The controller integrates the emergency stop signal and speed signal of the chassis dynamometer. When the controller receives the emergency stop signal and speed signal of the dynamometer during the test (and determines that the vehicle speed is 0), the controller can act automatically and immediately trip. The tripping action is the same as the manual control tripping method.

[0041] The reset control method is as follows:

[0042] The manual controller activates the reset motor, which pulls the reset rope to flip the guardrail inward. Under the tension of the reset rope, the base plate compresses the spring. Simultaneously, the locking hook rotates in the opposite direction of the release, reaching below the locking tongue and engaging with it. The reset motor then stops, and the reset is complete.

[0043] The above are preferred embodiments of the present invention. The basic principles and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from the spirit and scope of the present invention. All such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safe and efficient chassis dynamometer guard, characterized in that, The fence includes two uprights for supporting the fence, a reversing pulley is arranged on each upright, the lower end of each upright is mounted on a base, a tripping motor is arranged on the fence between the two uprights, two ends of a tripping rope are connected with the base respectively, the tripping rope is connected with the output shaft of the tripping motor after passing through the reversing pulley, a reset motor is arranged on the ground, one end of a reset rope is connected with the upper end of the fence, the lower end of the reset rope is connected with the output shaft of the reset motor, a controller is electrically connected with the tripping motor and the reset motor respectively; The base includes a base upper plate, a base lower plate and a base side plate, the base lower plate is fixedly connected with the base side plate, the rear side of the base upper plate is hingedly connected with the base lower plate, a spring is arranged between the base upper plate and the base lower plate, a lock catch mounting slot is arranged on the base upper plate, the lock catch is mounted in the lock catch mounting slot through a rotating shaft, the tripping rope is connected with the lock catch, a lock tongue protruding forward is arranged on the front side of the base lower plate, the lock tongue is movably clamped with the lock catch, the lower end of the upright is fixed on the base upper plate; The lock catch includes a connecting portion and a lock hook fixedly arranged below the connecting portion, the lock hook is clamped with the lock tongue.

2. The safe and efficient chassis dynamometer guardrail according to claim 1, wherein, The reversing pulley is arranged at the central position in the height direction of the fence, and the position of the tripping motor is lower than the height of the reversing pulley.

3. The safe and efficient chassis dynamometer guardrail of claim 1, wherein, A support column extending into the ground is arranged below the base, and the upper end of the support column is fixedly connected with the base.

4. The safe and efficient chassis dynamometer guardrail of claim 1, wherein, The two bases have the same structure.

5. The safe and efficient chassis dynamometer guardrail of claim 1, wherein, A limiting protrusion extending to the base upper plate is arranged on the side opposite to the base side plate of the base upper plate, and the front side of the limiting protrusion is a slope interfering with the movement track of the base upper plate.

6. The safe and efficient chassis dynamometer guardrail of claim 1, wherein, An open slot is arranged on the rear side of the base upper plate, and the lower end of the limiting device is fixed on the base lower plate after passing through the open slot.

7. The safe and efficient chassis dynamometer guardrail of claim 6, wherein, The included angle between the axial center line of the limiting device and the axial center line of the upright is an acute angle.

8. The safe and efficient chassis dynamometer guardrail of claim 7, wherein, The axial center line of the limiting device is not parallel to the base side plate.

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