A simulated load loading device for a large chassis dynamometer

Abstract

The present invention discloses a simulated load loading device for a large chassis dynamometer, comprising a support base, a sliding base slidably mounted on the support base, a suspension base disposed on the top of the sliding base and suspended from the bottom of a vehicle frame, with a drag wheel disposed on the side of the suspension base; a dragging belt having a first end fixed to the support base and a second end passing over the dragging wheels in a one-to-one correspondence; and a dragging drive member fixedly connected to the second ends of all the dragging belts and fixed to the support base. The second ends of the dragging belts pass over the dragging wheels and are connected to the dragging drive member. When the dragging drive member is activated, the dragging belts vertically drag the dragging wheels. Simultaneously, the sliding base drives the dragging wheels to move synchronously with the vehicle frame, so that the dragging belts continuously apply a vertical load to the vehicle frame. This eliminates the need for frequent manual addition of stones or replacement of loading boxes, reduces manual involvement, reduces labor intensity, and improves loading efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of dynamometers, in particular to a simulated load loading device for a large chassis dynamometer. Background Art

[0002] Large chassis dynamometers are large-scale equipment necessary for completing indoor automobile economy tests, power tests, emission performance evaluation and analysis, reliability tests, and special tests related to vehicle transmission systems. They are usually suitable for heavy vehicles such as tractors, dump trucks, mixer trucks, and trucks, and have a wide range of applications.

[0003] During testing, a simulated load equivalent to that of the simulated vehicle is typically applied to a large chassis dynamometer. Existing large chassis dynamometers typically utilize a load-carrying container for loading. However, the required load varies from test to test, necessitating the temporary installation of an appropriate load-carrying container. Furthermore, test personnel are required to manually add rocks of appropriate weight to the container, a labor-intensive process that compromises loading efficiency.

[0004] Therefore, how to improve the loading efficiency of large chassis dynamometers is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a simulated load loading device for a large chassis dynamometer, in which a dragging belt, one end of which is fixed to a support seat and the other end of which is connected to a dragging drive member, passes around a dragging wheel located on the top of a sliding seat, and the dragging drive member is started. The dragging belt drags the dragging wheel vertically, and the dragging wheel simulates applying a vertical load to the vehicle frame; there is no need to frequently manually add stones or replace loading boxes, so the labor intensity is reduced and the loading efficiency is higher.

[0006] The present invention provides a simulated load loading device for a large chassis dynamometer, comprising:

[0007] Support seat;

[0008] a sliding seat slidably mounted on the support seat and adapted to move synchronously with the vehicle frame;

[0009] A suspension seat is provided on the top of the sliding seat and is used to be suspended on the vehicle frame, and a traction wheel is provided on the side of the suspension seat;

[0010] A drag belt having a first end fixed to a support base and a second end passing around a drag wheel in a one-to-one correspondence;

[0011] A dragging driving member is fixedly connected to the second ends of all the dragging belts and fixed on the supporting seat, and is used for dragging the dragging wheel through the dragging belt so that the dragging wheel applies a vertical load to the vehicle frame.

[0012] Preferably, it also includes:

[0013] A left roller and a right roller are rotatably arranged on the left and right sides of the bottom of the sliding seat and are used to limit the dragging belt to wrap around or wrap out of the dragging wheel to prevent the dragging belt from escaping from the dragging wheel.

[0014] Preferably, it also includes:

[0015] The linear transmission component is installed on the support seat and is arranged between the second end of the dragging belt and the dragging driving component, and is used for adjusting the vertical load applied by the dragging belt to the dragging wheel.

[0016] Preferably, the linear transmission element comprises:

[0017] A linear screw fixedly connected to the drag drive member;

[0018] A linear slider sleeved on the linear screw and fixedly connected to the second end of the dragging belt, used for driving the second end of the dragging belt to move along the support seat when the linear screw rotates;

[0019] A T-shaped slider or T-shaped slot is provided between the linear slider and the support seat and cooperates with each other to guide the movement of the linear slider and limit the linear slider from leaving the support seat.

[0020] Preferably, the suspension seat includes a seat body, two bearing rods passing through the seat body and used to be fixedly connected to the bottom of the frame, and a support rod passing through the seat body and used to support the towing wheel; the two bearing rods and the support rod are distributed in a triangular shape.

[0021] Preferably, it also includes:

[0022] A guide rail and a guide groove are arranged between the sliding seat and the supporting seat and cooperate with each other to guide the sliding seat to move relative to the supporting seat.

[0023] Preferably, it also includes:

[0024] A tension adjusting member is fixed on the support seat and connected to the dragging belt, and is used to adjust the tightness of the dragging belt.

[0025] Preferably, the tension adjusting member is a strap tightener.

[0026] Preferably, it also includes:

[0027] A fixing seat fixedly mounted on the supporting seat and fixedly connected to the first end of the towing belt;

[0028] a force detection member provided with a fixing seat and used to detect the current load applied by the towing belt to the fixing seat;

[0029] A display for showing the current load;

[0030] A controller connected to the force detection member and the display, the controller is used to control the display to display the current load according to the signal sent by the force detection member.

[0031] Preferably, an alarm connected to the controller is further included, and the controller activates the alarm when the current load exceeds a preset load range based on the signal sent by the force detection component.

[0032] Compared with the background technology, the simulated load loading device of the large chassis dynamometer provided by the present invention includes a support seat, a sliding seat, a drag wheel, a drag belt and a drag drive member. The first end of the drag belt is fixed on the support seat, and the second end thereof is connected to the drag drive member after passing around the drag wheel. When the drag drive member is started, the drag belt drags the drag wheel vertically, and the drag wheel simulates applying a vertical load to the frame; at the same time, the sliding seat drives the drag wheel to move synchronously with the frame along the support seat, so that the drag belt continuously applies a vertical load to the frame, and the vertical load on the frame depends on the output load of the drag drive member. There is no need to manually add stones or replace loading boxes frequently, the manual participation is small, the labor intensity is reduced, and the loading efficiency is high.

[0033] Therefore, the simulated load loading device for the large chassis dynamometer provided by the invention can effectively improve the loading efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0035] Figure 1 A front view of a simulated load loading device for a large chassis dynamometer provided in a specific embodiment of the present invention;

[0036] Figure 2 for Figure 1 Top view of .

[0037] The reference numerals are as follows:

[0038] Support base 1, sliding base 2, suspension base 3, drag wheel 4, drag belt 5, drag driving member 6, left roller 71, right roller 72, linear transmission member 8, tension adjustment member 9, fixed base 10 and force detection member 11;

[0039] Seat body 31, bearing rod 32 and support rod 33;

[0040] Linear screw 81 and linear slider 82. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 making creative efforts are within the scope of protection of the present invention.

[0042] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] Please refer to Figures 1 to 2 , Figure 1 A front view of a simulated load loading device for a large chassis dynamometer provided in a specific embodiment of the present invention; Figure 2 for Figure 1 Top view of .

[0044] The embodiment of the present invention discloses a simulated load loading device for a large chassis dynamometer, comprising a support base 1, a sliding base 2, a suspension base 3, a drag wheel 4, a drag belt 5 and a drag driving member 6.

[0045] The support base 1 is used to support other components, is placed parallel to the ground, and is fixed relative to the ground.

[0046] Sliding seat 2 is slidably mounted on support seat 1. Sliding seat 2 slides relative to support seat 1 and moves synchronously with the vehicle frame, ensuring that sliding seat 2 always remains perpendicular to the vehicle frame, ensuring that the load applied to the vehicle frame is always vertical. The sliding speed of sliding seat 2 depends on the movement speed of the vehicle frame.

[0047] The suspension seat 3 is arranged on the top of the sliding seat 2 and is suspended on the bottom of the frame to drive the sliding seat 2 and the frame to move synchronously. Figure 1 The current view is used.

[0048] The side of the suspension seat 3 is provided with a drag wheel 4. In this specific embodiment, the drag wheel 4 is specifically provided on the front and rear sides of the suspension seat 3. Here, the front and rear positions are both attached. Figure 2 A traction wheel 4 is respectively provided on the front and rear sides of the suspension seat 3, and each traction wheel 4 is equipped with a rolling bearing.

[0049] The first end of the dragging belt 5 is fixed to the support base 1, and its second end is passed around the dragging roller 4 in a one-to-one correspondence. After passing around the dragging roller 4, the second end of the dragging belt 5 is connected to the dragging drive 6. The dragging drive 6 drags the dragging roller 4 through the dragging belt 5, thereby dragging the suspension base 3, and then dragging the vehicle frame connected to the suspension base 3, causing the dragging roller 4 to apply a vertical load to the vehicle frame. In this specific embodiment, the present invention specifically includes two dragging belts 5, which respectively cooperate with the dragging roller 4 on the front and rear sides of the suspension base 3. The number of dragging belts 5 provided is determined by the number of dragging rollers 4, with each dragging roller 4 correspondingly abutting a dragging belt 5.

[0050] The dragging drive 6 is fixed to the support base 1, while the dragging wheel 4 is located at the bottom of the sliding base 2. This creates a triangular trajectory for the dragging belt 5, facilitating loading of the dragging belt 5 onto the dragging wheel 4. The dragging drive 6 is preferably a motor, such as a servo motor equipped with a gear reduction box. Alternatively, the dragging drive 6 may be a hydraulic cylinder or a pneumatic cylinder, while still achieving the objectives of the present invention.

[0051] During use, the dragging drive 6 is activated, one end of the dragging belt 5 is fixed, and the other end is dragged, causing the dragging belt 5 to apply a force to the dragging wheel 4, thereby causing the dragging wheel 4 to simulate applying a vertical load to the vehicle frame. Furthermore, the dragging wheel 4 moves synchronously with the vehicle, causing the sliding seat 2 to move along the support seat 1 under the action of the dragging wheel 4, causing the dragging belt 5 to continuously apply a vertical load to the vehicle frame. The vertical load on the vehicle frame depends on the output load of the dragging drive 6. There is no need to frequently manually add stones or replace loading boxes, which reduces manual participation, labor intensity, and loading efficiency. Therefore, the simulated load loading device for a large chassis dynamometer provided by the invention can effectively improve loading efficiency.

[0052] The present invention further comprises a left roller 71 and a right roller 72 rotatably disposed on the left and right sides of the bottom of the sliding seat 2. Figure 1 Based on the current view, the dragging belt 5 abuts against the bottom of the left roller 71 and the bottom of the right roller 72, respectively. After passing the left roller 71, the dragging belt 5 continues to extend upward until it is wrapped around the dragging wheel 4. After passing the dragging belt 5 around the dragging wheel 4, it continues to extend downward until it is wrapped out from the bottom of the right roller 72. Obviously, the arrangement of the left and right rollers 71 and 72 can limit the dragging belt 5 from being wrapped around or out of the dragging wheel 4, effectively preventing the dragging belt 5 from being separated from the dragging wheel 4. In this specific embodiment, the length of the left roller 71 is equal to the length of the right roller 72, and both lengths are set based on the distance between the two dragging belts 5 and the width of the dragging belt 5, which will not be specifically defined here.

[0053] The left side of the sliding seat 2 is provided with a left mounting groove for mounting the left roller 71. The left roller 71 is mounted in the left mounting groove through a rotating shaft. The two opposite side walls of the left mounting groove respectively abut against the two ends of the left roller 71, thereby preventing the dragging belt 5 from being separated from the left roller 71 and improving reliability. At the same time, the right side of the sliding seat 2 is provided with a right mounting groove for mounting the right roller 72. The installation method of the right roller 72 is the same as that of the left roller 71. The two ends of the right roller 72 respectively abut against the two opposite sides of the right mounting groove, thereby preventing the dragging belt 5 from being separated from the right roller 72, thereby further preventing the dragging belt 5 from being separated from the dragging wheel 4 and further improving reliability.

[0054] In this embodiment, the left and right rollers 71 and 72 have equal outer diameters and are symmetrically mounted on the left and right sides of the sliding base 2. The vertical heights of the left and right rollers 71 and 72 relative to the support base 1 are determined based on the specific implementation, ensuring that the drag belt 5 remains parallel to the support base 1. The central axes of the drag wheel 4, the left roller 71, and the right roller 72 are parallel and arranged in a triangular pattern.

[0055] The present invention also includes a linear transmission member 8 arranged between the second end of the dragging belt 5 and the dragging drive member 6. The linear transmission member 8 is installed on the support base 1 to adjust the vertical load applied by the dragging belt 5 to the dragging wheel 4, thereby adjusting the vertical load applied to the frame. The vertical load can be adjusted according to the type of frame and actual working conditions, avoiding manual adjustment of the vertical load, facilitating use, and having good adaptability.

[0056] In this specific embodiment, the linear transmission member 8 is specifically a screw-nut pair, including a linear screw 81 and a linear slider 82. The linear screw 81 is fixedly connected to the drag drive member 6 through a coupling. The linear slider 82 is sleeved on the linear screw 81 and fixedly connected to the second end of the drag belt 5. The linear screw 81 is threadedly connected to the linear slider 82. In order to ensure the stable sliding of the linear slider 82, the linear transmission member 8 also includes a T-shaped slider or T-shaped slide groove provided between the linear slider 82 and the support seat 1 and cooperating with each other. The T-shaped slider is specifically provided at the bottom of the linear slider 82, and the T-shaped slide groove is specifically provided on the upper surface of the support seat 1, so that the T-shaped slide groove guides the linear slider 82 to move in a straight line. At the same time, the T-shaped slide groove vertically abuts against the T-shaped slider, limiting the linear slider 82 from separating from the support seat 1, and ensuring the reliable sliding of the linear slider 82. Of course, interchanging the setting position of the T-shaped slider or T-shaped slide groove does not affect the purpose of the present invention.

[0057] When the linear screw 81 rotates forwardly under the drive of the dragging drive 6, the linear slider 82 moves right along the linear screw 81, the second end of the dragging belt 5 moves away from its first end, and the vertical load applied by the dragging belt 5 to the dragging wheel 4 increases; similarly, when the linear screw 81 rotates reversely under the drive of the dragging drive 6, the linear slider 82 moves left along the linear screw 81, the second end of the dragging belt 5 approaches its first end, and the vertical load applied by the dragging belt 5 to the dragging wheel 4 decreases, thereby achieving the adjustment of the size of the vertical load applied by the dragging belt 5 to the dragging wheel 4.

[0058] Of course, the structure of the linear transmission member 8 is not limited thereto.

[0059] In this embodiment, the suspension base 3 comprises a base body 31, two load-bearing rods 32, and support rods 33. The two load-bearing rods 32 pass through the base body 31 and are fixedly connected to the bottom of the vehicle frame. The support rods 33 pass through the base body 31 to support the drag wheel 4, which is sleeved onto the ends of the support rods 33. Specifically, the base body 31 has a triangular cross-section, and the two load-bearing rods 32 and the support rods 33 are arranged in a triangular pattern, with each rod located at each corner of the base body 31 cross-section. This provides a more stable structure and greater load-bearing capacity for the suspension base 3.

[0060] In this embodiment, the two support bars 32 are equal in length to the inner width of the vehicle frame and are supported by the vehicle's side crossbars. The width of the suspension base 3 is smaller than the inner width of the vehicle frame to prevent interference between the suspension base 3 and the vehicle frame during installation of the support bars 32.

[0061] To ensure smooth movement of the sliding seat 2 along the support seat 1, the present invention further includes a guide rail and a guide slot disposed between the sliding seat 2 and the support seat 1. The guide rail and the guide slot cooperate with each other. The guide rail is preferably fixed to the bottom of the sliding seat 2, and the guide slot is preferably disposed at the bottom of the support seat 1. Of course, the positions of the guide rail and the guide slot can also be interchanged. The guide rail can be a T-shaped rail, and the guide slot is correspondingly configured as a T-shaped slot. Of course, the structures of the guide rail and the guide slot are not limited to this.

[0062] The present invention also includes a tension adjuster 9 fixed to the support base 1 and connected to the drag strap 5 to adjust the tension of the drag strap 5 and prevent it from becoming excessively loose. The tension adjuster 9 is specifically a bandage tightener. The working principle of a bandage tightener is described in detail in the prior art and will not be described in detail here. Of course, the tension adjuster 9 can also be a belt tensioner.

[0063] The present invention also includes a fixing seat 10, a force detection member 11, a display and a controller, wherein the fixing seat 10 is fixed to the support seat 1 and is fixedly connected to the first end of the towing belt 5, and the fixing seat 10 is specifically fixed to the support seat 1 by a fastening screw. The force detection member 11 is provided with a fixing seat 10, which is used to detect the current load applied to the fixing seat 10 by the towing belt 5. The force detection member 11 can be a force sensor, but is not limited to this. The display is used to display the current load. The controller is respectively connected to the force detection member 11 and the display, and the controller is used to control the display to display the current load according to the signal sent by the force detection member 11, so that the test personnel can detect the vertical load value applied to the frame by the towing belt 5 in real time. It is more convenient to use, has a higher loading efficiency and the loaded vertical load is more accurate.

[0064] The present invention also includes an alarm connected to the controller. When the force detection component 11 detects that the current load exceeds the preset load range, it means that the dragging belt 5 is very likely to be broken or the dragging driving component 6 is working abnormally. At this time, the force detection component 11 sends a signal to the controller, and the controller activates the alarm to remind the test personnel to perform corresponding operations, such as shutting down, until the alarm is lifted, thereby realizing automatic alarm and safe and reliable work.

[0065] It should be noted that the controller should include a signal receiving unit, a signal judging unit, and a signal sending unit. The signal receiving unit is used to receive the electrical signal sent by the force detection member 11. The signal judging unit and the receiving unit are electrically connected so that the signal judging unit can judge whether the signal received by the receiving unit is a trigger signal. The signal sending unit and the signal judging unit are electrically connected so that the signal sending unit can send the judgment signal generated by the signal judging unit to the alarm. The specific configuration of the signal receiving unit, the signal judging unit, and the signal sending unit can refer to the existing technology. In the present invention, only the application scenarios of the above three units are changed, and no substantial improvement is made to them.

[0066] Obviously, the controller with this structure is widely used in existing automatic control equipment, such as MCU, DSP or single chip microcomputer, etc. The key point of the present invention is that the controller combines the force detection member 11 and the alarm.

[0067] The above is a detailed introduction to the simulated load loading device of the large chassis dynamometer provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A simulated load loading device for a large chassis dynamometer, characterized in that: include: Support seat (1); A sliding seat (2) slidably mounted on the support seat (1) and configured to move synchronously with the vehicle frame; A suspension seat (3) is provided on the top of the sliding seat (2) and is used for being suspended on the vehicle frame. A drag wheel (4) is provided on each of the front and rear sides of the suspension seat (3). Each of the drag wheels (4) is equipped with a rolling bearing. A dragging belt (5) having a first end fixed to the support seat (1) and a second end passing around the dragging wheel (4) in a one-to-one correspondence; A dragging drive member (6) fixedly connected to the second ends of all the dragging belts (5) and fixed to the support seat (1), and used for dragging the dragging wheel (4) through the dragging belts (5) so that the dragging wheel (4) applies a vertical load to the vehicle frame; The suspension seat (3) comprises a seat body (31), two bearing rods (32) passing through the seat body (31) and used for being fixedly connected to the bottom of the vehicle frame, and a support rod (33) passing through the seat body (31) and used for supporting the drag wheel (4); the two bearing rods (32) and the support rod (33) are distributed in a triangular shape.

2. The simulated load loading device for a large chassis dynamometer according to claim 1, characterized in that: Also includes: A left roller (71) and a right roller (72) are rotatably arranged on the left and right sides of the bottom of the sliding seat (2) and are used to limit the dragging belt (5) from winding around or winding out of the dragging wheel (4) to prevent the dragging belt (5) from escaping from the dragging wheel (4).

3. The simulated load loading device for a large chassis dynamometer according to claim 1, characterized in that: Also includes: A linear transmission member (8) is mounted on the support seat (1) and disposed between the second end of the dragging belt (5) and the dragging drive member (6), and is used to adjust the vertical load applied by the dragging belt (5) to the dragging wheel (4).

4. The simulated load loading device for a large chassis dynamometer according to claim 3, characterized in that: The linear transmission member (8) comprises: a linear screw (81) fixedly connected to the drag driving member (6); a linear slider (82) sleeved on the linear screw (81) and fixedly connected to the second end of the dragging belt (5), and used for driving the second end of the dragging belt (5) to move along the support seat (1) when the linear screw (81) rotates; A T-shaped slider or T-shaped slot is provided between the linear slider (82) and the support seat (1) and cooperates with each other to guide the linear slider (82) to move and restrict the linear slider (82) from separating from the support seat (1).

5. The simulated load loading device for a large chassis dynamometer according to any one of claims 1 to 4, characterized in that: Also includes: A guide rail and a guide groove are provided between the sliding seat (2) and the supporting seat (1) and cooperate with each other to guide the sliding seat (2) to move relative to the supporting seat (1).

6. The simulated load loading device for a large chassis dynamometer according to any one of claims 1 to 4, characterized in that: Also includes: A tension adjusting member (9) is fixed to the support seat (1) and connected to the dragging belt (5), and is used to adjust the tightness of the dragging belt (5).

7. The simulated load loading device for a large chassis dynamometer according to claim 6, characterized in that: The tension adjusting member (9) is specifically a strap tightener.

8. The simulated load loading device for a large chassis dynamometer according to any one of claims 1 to 4, characterized in that: Also includes: a fixing seat (10) fixedly mounted on the supporting seat (1) and fixedly connected to the first end of the dragging belt (5); A force detection member (11) is provided with the fixing seat (10) and is used to detect the current load applied by the dragging belt (5) to the fixing seat (10); a display for displaying the current load; A controller connected to the force detection member (11) and the display, the controller being used to control the display to display the current load according to a signal sent by the force detection member (11).

9. The simulated load loading device for a large chassis dynamometer according to claim 8, characterized in that: It also includes an alarm connected to the controller, and the controller activates the alarm when the current load exceeds a preset load range based on a signal sent by the force detection member (11).

Images