Icebreaking fatigue test device and method for hidden vehicle door handle

Abstract

The invention provides an icebreaking fatigue test device and method for a hidden vehicle door handle, and the device is characterized in that a mounting part of the vehicle door handle is fixed through a rack body, a motor of the vehicle door handle is electrically connected to a controller, and the motor is controlled by the controller to drive a pop-up part of the vehicle door handle to pop up; the trigger device is provided with a fixed part and a sliding part, the fixed part is fixed through the rack body, the sliding part can slide along the fixed part, the near end of the sliding part is located on the popping path of the vehicle door handle popping part, and the far end of the sliding part is connected to the counterweight device through a pulley mechanism installed on the rack body; and the controller is used for controlling the popping of the popping part of the automobile door handle and the lifting of the counterweight device. The method and the device can fully simulate the icebreaking opening fatigue action of the hidden vehicle door handle under the freezing working condition, and are wide in application, good in reliability and low in cost.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle component performance testing, and in particular relates to an ice-breaking fatigue test device and method for a hidden door handle. Background Art

[0002] Hidden door handles (with electric pop-up function) have been used on cars as a new type of handle. During the development process, it is necessary to verify whether the hidden handles can automatically break the ice and pop out when the door handles are frozen after freezing rain. The present invention uses a cylinder-driven test bench to replace the working conditions of breaking ice for door handles in a natural environment, thereby achieving the purpose of accelerated durability testing. The ice-breaking fatigue test scheme used in the prior art is completed by powering on the handle so that it always pushes a fixed load. There is always a load when popping out and retracting, and the actual situation when the handle is just popped out and when the handle is retracted is not considered.

[0003] Invention patent content

[0004] In view of the above problems, the present invention provides an ice-breaking fatigue test device and method for a hidden door handle, which simulates the pop-up process of the door handle by building a simple test bench with the help of a pulley mechanism and a controller, and is convenient, flexible and has good versatility. The purpose of the present invention is achieved through the following technical solutions:

[0005] The present invention first provides an ice-breaking fatigue test device for a hidden door handle, which includes: a test bench body, a trigger device, a controller, and a door handle and a counterweight device driven by the controller:

[0006] The mounting portion of the door handle is fixed by the platform body, the motor of the door handle is electrically connected to the controller, and the motor is controlled by the controller to drive the pop-up portion of the door handle to pop out;

[0007] The trigger device comprises a fixed part and a sliding part, wherein the fixed part is fixed by the platform body, and the sliding part can slide along the fixed part, wherein the proximal end of the sliding part is located on the ejection path of the door handle ejection part, and the distal end of the sliding part is connected to the counterweight device via a pulley mechanism installed on the platform body;

[0008] The controller is used to control the pop-up of the door handle pop-up part and the lifting and lowering of the counterweight device.

[0009] Furthermore, a position switch for detecting the position of the pop-up portion of the door handle is also provided on the test stand body, and the position switch is electrically connected to the controller. Preferably, the position switch includes a first switch and a second switch, the first switch is used to detect a signal that the pop-up portion of the door handle has popped out to a certain position, and the second switch is used to detect a signal that the pop-up portion of the door handle has retracted to a certain position. During the test, when the door handle is powered on and the pop-up portion pops out to a preset position, the first switch transmits a signal that the pop-up portion of the door handle has popped out to a certain position to the controller, and when the door handle is reset, the second switch transmits a signal that the pop-up portion of the door handle has reset to the controller.

[0010] Furthermore, the sliding part of the trigger device includes a sliding bearing and a stopper, the proximal end of the sliding bearing is located on the pop-up path of the door handle pop-up part, the distal end of the sliding bearing is connected to the first end of the stopper, and the second end of the stopper is connected to the counterweight device through a pulley mechanism. Preferably, the sliding bearing is arranged in an axially horizontal direction, and the first end connected to the stopper is located below the second end, so as to better arrange the pulley mechanism and the counterweight device, and provide a slight radial force for the sliding bearing in the fatigue test, so as to better simulate the state of the pop-up and force application of the door handle pop-up part.

[0011] Furthermore, a buffer spring is connected between the second end of the block and the steel wire rope of the pulley mechanism so as to more precisely simulate the stress conditions of the door handle pop-up part when it breaks ice and pops out, thereby more completely simulating the ice-breaking fatigue of the actual vehicle door handle.

[0012] Furthermore, the counterweight device includes a counterweight block and a cylinder, and the cylinder is driven by a controller to support the lifting and lowering of the counterweight block; the weight of the counterweight block is not less than the resistance of the actual vehicle door handle when breaking ice under freezing conditions, so as to obtain more comprehensive door handle ice-breaking fatigue performance data.

[0013] The present invention further provides an ice breaking fatigue test method for a hidden door handle, which comprises the following steps:

[0014] Step S1: controlling the door handle motor to be powered on so that its pop-up portion pops out from the mounting portion and pushes the sliding portion of the trigger device to move toward the far end along a first direction; usually, the first direction is a horizontal direction;

[0015] Step S2: after receiving the signal that the door handle has been ejected, the counterweight device is driven to rise, and the sliding portion of the reverse push trigger device is moved toward the proximal end in the first direction to reset, so that the ejection portion of the door handle is reset;

[0016] Step S3: Repeat the above steps for a preset number of times until the fatigue test is completed.

[0017] Preferably, step S3 includes: counting after receiving the signal of resetting the door handle pop-up part, and judging whether the number of tests exceeds the preset number of cycles, if not, returning to step S1, if exceeded, ending the test.

[0018] Furthermore, in order to simulate extreme environmental conditions, the entire device can be moved to an environmental chamber for fatigue testing at -40°C; the cylinder can be insulated by heating with an electric blanket to ensure the reliability of the test bench when working at low temperatures.

[0019] The beneficial effects of the present invention are:

[0020] (1) The method and device of the present invention can fully simulate the ice-breaking and opening fatigue action of a hidden door handle under freezing conditions, and can be used for the pop-up test of all hidden car handles with electric pop-up functions, and is widely applicable;

[0021] (2) The test device of the present invention has the advantages of flexible bench construction, full simulation of actual working conditions, good reliability and low cost, which can ensure that the fatigue performance of the product is fully verified before it is put on the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of an ice-breaking fatigue test device for a hidden door handle of the present invention;

[0023] Figure 2 Shown is a field installation diagram of the experimental device of the present invention;

[0024] Figure 3 Shown is a flow chart of the test method of Example 2 of the present invention. DETAILED DESCRIPTION

[0025] The technical scheme of the preferred embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] This embodiment provides an ice breaking fatigue test device for a hidden door handle. Figure 1 and Figure 2 As shown, the device includes: a platform body 700, a trigger device, a controller, and a door handle 100 and a counterweight device driven by the controller:

[0028] The mounting portion of the door handle 100 is fixed by the platform body, the motor of the door handle is electrically connected to the controller, and the motor is controlled by the controller to drive the pop-up portion of the door handle to pop out;

[0029] The trigger device has a fixed portion and a sliding portion, the fixed portion is fixed by the platform body, the sliding portion can slide along the fixed portion, the proximal end of the sliding portion is located on the pop-up path of the door handle pop-up portion, and the distal end of the sliding portion is connected to the counterweight device through a pulley mechanism installed on the platform body. In the illustrated embodiment, the sliding portion of the trigger device includes a sliding bearing 201 and a stopper 202, the proximal end of the sliding bearing is located on the pop-up path of the door handle pop-up portion, the distal end of the sliding bearing 201 is connected to the first end (the lower end in the figure) of the stopper 202, and the second end (the upper end in the figure) of the stopper is connected to the counterweight device through a pulley mechanism.

[0030] In the illustrated embodiment, the counterweight device includes a counterweight block 401 and a cylinder 402. The cylinder 402 is driven by a controller to support the lifting and lowering of the counterweight block, thereby changing the magnitude of the traction force on the trigger device, and then changing the direction and magnitude of the force of the trigger device on the pop-up part of the door handle. Generally, the weight of the counterweight block is not less than the resistance of the actual vehicle door handle when breaking ice under freezing conditions, so as to more completely simulate the ice-breaking fatigue of the actual vehicle door handle.

[0031] The controller controls the pop-up of the door handle pop-up part and the lifting and lowering of the counterweight device.

[0032] In the illustrated embodiment, a position switch for detecting the position of the door handle is further provided at a position on the platform body 700 adapted to the movement path of the pop-up portion of the door handle. The position switch is electrically connected to the controller and is used to transmit a signal that the pop-up portion of the door handle is in place to the controller. The position switch includes a first switch 601 and a second switch 602. The first switch 601 is used to detect a signal that the pop-up portion of the door handle is in place, and the second switch 602 is used to detect a signal that the pop-up portion of the door handle is retracted into place.

[0033] In the illustrated embodiment, in order to better simulate the stress state when the door handle pop-up portion pops out, a buffer spring 500 is connected between the second end of the stopper 202 and the steel wire rope 301 of the pulley mechanism.

[0034] Embodiment 2:

[0035] This embodiment provides an ice-breaking fatigue test method for a hidden door handle based on the device of embodiment 1, which comprises the following steps:

[0036] Step S1: controlling the door handle motor to be powered on so that its pop-up portion pops out from the mounting portion and pushes the sliding portion of the trigger device to move along a first direction;

[0037] Step S2: after receiving a signal indicating that the pop-up portion of the door handle has been ejected into position, the counterweight device is driven to rise, and the sliding portion of the reverse push trigger device is reset, so that the pop-up portion of the door handle is retracted;

[0038] Step S3: After receiving the signal of the door handle pop-up part being reset, count and determine whether the test number exceeds the preset cycle number N. If not, return to step S1; if exceeded, end the test.

[0039] In a specific embodiment, in order to simulate extreme environmental conditions, the entire device can be moved to an environmental chamber for fatigue testing at -40°C.

[0040] In a preferred embodiment, the controller is programmed by LOGO. The specific test process is as follows: run the programmed LOGO program, power on the door handle 100 so that the pop-up part pops out, pushing the block 202 installed on the sliding bearing 201, and the block 202 indirectly pushes the counterweight 401 through the buffer spring 500, the wire rope 301, and the pulley 302, that is, the state of breaking ice when the handle pops out is realized. The first switch 601 detects that the pop-up part of the handle has popped out, and the signal is transmitted to the LOGO box controller. At this time, the cylinder 402 is driven to act, pushing the counterweight 401 to rise, unloading the force acting on the door handle 100, and after the pop-up part of the door handle 100 retracts, the second switch 602 transmits the signal to the LOGO box controller to perform the next cycle. The LOGO program can set the number of cycles according to the test standard requirements. The role of the cylinder 402 is to unload the handle as soon as it pops out a little, so as to simulate the working condition that the pressure of the ice layer on the handle disappears after the real handle breaks the ice.

[0041] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention. The dimensions described in the drawings and embodiments are not related to the specific objects and are not used to limit the protection scope of the present invention. The dimensions of the objects can be selected and changed according to actual needs.

Claims

1. An ice breaking fatigue test device for a hidden door handle, comprising: Test bench body, trigger device, controller, and door handle and counterweight device driven by the controller: The mounting portion of the door handle is fixed by the platform body, the motor of the door handle is electrically connected to the controller, and the motor is controlled by the controller to drive the pop-up portion of the door handle to pop out; The trigger device comprises a fixed part and a sliding part, wherein the fixed part is fixed by the platform body, and the sliding part can slide along the fixed part, wherein the proximal end of the sliding part is located on the ejection path of the door handle ejection part, and the distal end of the sliding part is connected to the counterweight device via a pulley mechanism installed on the platform body; The controller controls the pop-up of the door handle pop-up part and the lifting and lowering of the counterweight device.

2. The ice breaking fatigue test device for a hidden door handle according to claim 1, characterized in that: The platform body is also provided with a position switch for detecting the position of the pop-up portion of the door handle, and the position switch is electrically connected to the controller.

3. The ice breaking fatigue test device for a hidden door handle according to claim 2, characterized in that: The position switch includes a first switch and a second switch, wherein the first switch is used to detect a signal that the pop-up portion of the door handle pops out to a certain position, and the second switch is used to detect a signal that the pop-up portion of the door handle retracts to a certain position.

4. An ice breaking fatigue test device for a hidden door handle according to any one of claims 1 to 3, characterized in that: The sliding portion of the trigger device includes a sliding bearing and a stopper, the proximal end of the sliding bearing is located on the pop-up path of the door handle pop-up portion, the distal end of the sliding bearing is connected to the first end of the stopper, and the second end of the stopper is connected to the counterweight device through a pulley mechanism.

5. The ice breaking fatigue test device for a hidden door handle according to claim 4, characterized in that: A buffer spring is connected between the second end of the stopper and the steel wire rope of the pulley mechanism.

6. An ice breaking fatigue test device for a hidden door handle according to any one of claims 1 to 5, characterized in that: The counterweight device comprises a counterweight block and a cylinder, and the cylinder is driven by a controller to support the lifting of the counterweight block.

7. The ice breaking fatigue test device for a hidden door handle according to claim 6, characterized in that: The weight of the counterweight block is not less than the resistance of the door handle of an actual vehicle when breaking ice under freezing conditions.

8. An ice breaking fatigue test method for a hidden door handle, comprising the following steps: Step S1: controlling the door handle motor to be powered on so that its pop-up portion pops out from the mounting portion and pushes the sliding portion of the trigger device to move along a first direction; Step S2: after receiving the signal that the door handle has been ejected, the counterweight device is driven to rise, and the sliding part of the reverse push trigger device is reset, so that the ejection part of the door handle is reset; Step S3: Repeat the above steps for a preset number of times until the fatigue test is completed.

9. The ice breaking fatigue test method for a hidden door handle according to claim 8, characterized in that: The step S3 includes: counting after receiving the signal of the door handle reset, and judging whether the number of tests exceeds the preset number of cycles, if not, returning to step S1, if exceeded, ending.

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