Detection device and vehicle assembly system having the same

Abstract

The embodiment of the present application provides a detection device and a vehicle assembly system having the detection device. The detection device is used to detect whether the height of the tightening rod on the vehicle assembly pallet extending downward from the vehicle assembly pallet is lower than the specified height. The detection device includes: a mounting bracket; an alarm switch, the alarm switch is arranged on the mounting bracket; and a detection plate, the detection plate is rotatably arranged on the mounting bracket, and the height of the upper surface of the detection plate corresponds to the specified height, so that when the height of the tightening rod is lower than the specified height, the tightening rod contacts the detection plate in the initial position and pushes the detection plate to rotate to the trigger position of the alarm switch, so that the alarm switch sends an alarm signal. The detection device has higher reliability and can reduce or avoid false detection.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of vehicle production equipment, and in particular, to a detection device and a vehicle assembly system having the detection device. Background Art

[0002] In a vehicle assembly production line, a vehicle assembly pallet is placed on a conveyor line to move between different workstations through the conveyor line. The vehicle assembly pallet is used to carry the chassis of the vehicle and the parts on the chassis. In addition, a tightening rod for screwing bolts, etc. is also provided on the vehicle assembly pallet, and the tightening rod extends downward from the pallet to a certain height. However, during the vehicle assembly process, if the spring in the tightening rod is loose or fails, the height of the tightening rod extending downward from the pallet will increase, so that the tightening rod will collide with the equipment under the chassis, such as the hook / unhook device, during the movement of the vehicle assembly pallet. This will cause damage to the equipment and cause the production line to stop for a long time. In order to avoid this problem, it is necessary to detect whether the height of the tightening rod is lower than the specified height. In the prior art, a laser ranging sensor is used to detect the height of the lower end of the tightening rod to detect a tightening rod with a height that is too low. However, the use of a laser ranging sensor for detection is susceptible to environmental interference and has a high false detection rate. Summary of the invention

[0003] In order to solve the above problems, the embodiments of the present application provide a detection device and a vehicle assembly system having the same, so as to at least partially solve the above problems.

[0004] According to a first aspect of an embodiment of the present application, a detection device is provided, which is used to detect whether the height of a tightening rod on a vehicle assembly pallet extending downward from the vehicle assembly pallet is lower than a specified height, the detection device comprising: a mounting bracket; an alarm switch, the alarm switch being arranged on the mounting bracket; and a detection plate, the detection plate being rotatably arranged on the mounting bracket, the height of the upper surface of the detection plate corresponding to the specified height, so that when the height of the tightening rod is lower than the specified height, the tightening rod contacts the detection plate in an initial position and pushes the detection plate to rotate to a trigger position that triggers the alarm switch, so that the alarm switch sends an alarm signal.

[0005] Optionally, the alarm switch is a touch-type induction switch and is located on the first side of the detection plate. When the detection plate rotates to the trigger position, the alarm switch contacts the alarm switch to trigger the alarm switch.

[0006] Optionally, the detection device further comprises a check member, which is disposed on the mounting bracket and keeps the detection plate at the trigger position in contact with the alarm switch when the detection plate rotates to the trigger position.

[0007] Optionally, the detection plate has a first side surface for contacting the alarm switch and a second side surface opposite to the first side surface, and the detection device also includes a base and an elastic member, the base is fixedly disposed on the mounting bracket, the check member is disposed on the base, the elastic member is disposed between the check member and the base, the check member has a wedge-shaped portion protruding from the upper surface of the base, and when the detection plate rotates to the trigger position, the wedge-shaped portion contacts the second side surface of the detection plate to prevent the detection plate from being out of contact with the alarm switch.

[0008] Optionally, when the detection plate is in the initial position, the base is located below the detection plate, and an avoidance hole is provided on the detection plate, and the wedge-shaped portion can at least partially extend into the avoidance hole.

[0009] Optionally, a first groove is provided on the detection plate, and the detection device further comprises a limit plunger, which is provided on the mounting bracket, and at least a portion of the limit plunger is located in the first groove to limit the shaking of the detection plate when it is in an initial position.

[0010] Optionally, the surface of the first groove is a spherical surface, and the portion of the limiting plunger extending into the first groove is spherical or hemispherical.

[0011] Optionally, the rotation angle of the detection plate corresponding to the trigger position relative to the initial position is 30°. When the rotation angle of the detection plate relative to the initial position is in the range of 30° to 40°, the detection plate maintains contact with the alarm switch.

[0012] Optionally, the detection device further comprises a positioning pin, which is fixedly arranged on the mounting bracket, and the positioning pin and the alarm switch are located on the same side of the detection plate to limit the maximum rotatable angle of the detection plate.

[0013] Optionally, the detection plate has a protruding portion, and when the detection plate is in an initial position, the protruding portion can contact any tightening rod of the plurality of tightening rods on the vehicle assembly pallet whose height is lower than a specified height.

[0014] Optionally, the detection plate has a protruding portion facing the alarm switch, and the protruding portion is used to trigger the alarm switch.

[0015] According to another aspect of the present application, a vehicle assembly system is provided, which includes a conveyor line, a vehicle assembly pallet and a detection device. The vehicle assembly pallet is arranged on the conveyor line and can move along the conveyor line. A tightening rod is arranged on the vehicle assembly pallet. The detection device is the above-mentioned detection device, which is arranged on the conveyor line to detect whether the height of the tightening rod is lower than a specified height.

[0016] According to the detection device provided in the embodiment of the present application, the mounting bracket is used to provide a mounting position for the alarm switch and the contact detection plate, hereinafter referred to as the detection plate. The detection plate is set on the mounting bracket, and the height of the upper surface of the detection plate is a specified height, so that when the tightening rod passes through the detection plate during movement, if the height H of the tightening rod is lower than the specified height, it will contact the detection plate, thereby pushing the detection plate to rotate to the trigger position, thereby triggering the alarm switch to send out an alarm signal to inform the staff that the height H of the tightening rod is too low. Since this contact method is used to detect whether the height H of the tightening rod is too low, the problem of being easily affected by environmental interference and causing false detection or missed detection in non-contact methods such as laser ranging sensors in the prior art is overcome, thereby improving the detection reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings are intended only to illustrate and explain the present application, and do not limit the scope of the present application.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a first detection device according to an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the three-dimensional structure of a second detection device according to an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the second detection device of the embodiment of the present application without the detection plate;

[0021] Figure 4 Schematic diagram of a detection plate of a second detection device according to an embodiment of the present application at different rotation angles;

[0022] Figure 5 A schematic diagram of the three-dimensional structure of a detection board of a second detection device according to an embodiment of the present application;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the cooperation between the anti-return member and the base of the second detection device of the embodiment of the present application;

[0024] Figure 7 A schematic diagram of the three-dimensional structure of a conveyor line equipped with a detection device in a vehicle assembly system of an embodiment of the present application;

[0025] Figure 8 It is a partial enlarged view of the detection device in the vehicle assembly system of the embodiment of the present application.

[0026] List of reference numerals:

[0027] 10: Install the bracket;

[0028] 11: horizontal bar;

[0029] 13: vertical bar;

[0030] 15: Reinforcement rod;

[0031] 17: Mounting plate;

[0032] 20: Alarm switch;

[0033] 30, 30': detection board;

[0034] 31: avoidance hole;

[0035] 32: first groove;

[0036] 33: first side;

[0037] 35: Second side;

[0038] 50: mounting pin;

[0039] 70: positioning pin;

[0040] 60: limit plunger;

[0041] 21: trigger;

[0042] 41: Check piece;

[0043] 42: base;

[0044] 331: protruding part;

[0045] 332: protruding part;

[0046] 311: hole wall;

[0047] 411: wedge-shaped part;

[0048] 421: second groove;

[0049] 100: tighten the rod;

[0050] 200: conveyor line;

[0051] 300: Vehicle pallet. DETAILED DESCRIPTION

[0052] In order to have a clearer understanding of the technical features, purposes and effects of the embodiments of the present application, the specific implementation methods of the embodiments of the present application are now described with reference to the accompanying drawings.

[0053] Reference Figure 1According to an embodiment of the present application, a detection device is provided, which is used to detect whether the height H of the tightening rod 100 on the vehicle assembly pallet 300 extending downward from the vehicle assembly pallet 300 is lower than a specified height. The detection device includes a mounting bracket 10, an alarm switch 20 and a detection plate 30, and the alarm switch 20 is arranged on the mounting bracket 10; the detection plate 30 is rotatably arranged on the mounting bracket 10, and the height of the upper surface of the detection plate 30 corresponds to the specified height, so that when the height H of the tightening rod 100 is lower than the specified height, the tightening rod 100 contacts the detection plate 30 in the initial position, and pushes the detection plate 30 to rotate to the trigger position of triggering the alarm switch 20, so that the alarm switch 20 sends an alarm signal.

[0054] In this embodiment, the mounting bracket 10 is used to provide a mounting position for the alarm switch 20 and the detection plate 30. The detection plate 30 is arranged on the mounting bracket 10, and the height of the upper surface of the detection plate 30 corresponds to the specified height, so that when the tightening rod 100 passes through the detection plate 30 during movement, if the height H of the tightening rod 100 is lower than the specified height, it will contact the detection plate 30, thereby pushing the detection plate 30 to rotate to the trigger position, thereby triggering the alarm switch 20 to send out an alarm signal to inform the staff that the height H of the tightening rod 100 is too low. Since this contact method is used to detect whether the height H of the tightening rod 100 is too low, the problem of being easily affected by environmental interference and causing false detection or missed detection in non-contact methods such as laser ranging sensors in the prior art is overcome, thereby improving the detection reliability.

[0055] The detection device of this embodiment can be used to perform online detection during the production process (such as the vehicle assembly process), without the need for workers to spend extra time to perform special detection of the height of each tightening rod in the maintenance area, thereby reducing labor costs. Moreover, compared with the laser ranging sensor, the detection device of this embodiment is cheaper and more economical, which can reduce production costs.

[0056] It should be noted that the aforementioned specified height can be determined as needed. For example, in one usage scenario of the present embodiment, the specified height may be the height of the unhooking / unhooking device. In other usage scenarios, the specified height may be other heights. For example, the specified height may be a certain value below the height of the unhooking / unhooking device, etc., and the present embodiment does not limit this. The height of the upper surface of the detection plate 30 corresponding to the specified height can be understood as being consistent with the specified height, or the difference between the specified height and the specified height is less than or equal to the set value, and the set value can be determined as needed. The height H of the tightening rod 100 may be the height between the lower end of the tightening rod 100 and the mounting surface of the avoidance object (such as the unhooking / unhooking device in the present embodiment). For example, if the unhooking / unhooking device is installed on the ground, the height H is the height from the ground to the lower end of the tightening rod 100.

[0057] The structure and working process of the detection device of the mechanical contact type online automatic detection of this embodiment are described in detail as follows:

[0058] like Figure 2-Figure 4 As shown, the mounting bracket 10 of the detection device is installed on the conveyor line 200 used to transport the combined pallet 300 of the transport vehicle, which helps to locate the distance between the detection plate 30 and the conveyor line 200, so that the contact position between the tightening rod 100 and the detection plate 30 can be more conveniently adjusted, so that the detection plate 30 can adapt to the detection of different tightening rods 100.

[0059] Of course, in other embodiments, the mounting bracket 10 may also be fixed on other fixed objects, such as the ground, the wall, etc.

[0060] In an illustrated embodiment, the mounting bracket 10 includes a crossbar 11, a vertical bar 13, a reinforcing rod 15 and a mounting plate 17. The crossbar is horizontally arranged and extends along the conveying direction of the vertical conveyor line 200. The first end of the crossbar 11 is installed on the conveyor line 200, and the vertical bar 13 is connected to the second end of the crossbar 11. The reinforcing rod 15 is connected between the crossbar 11 and the vertical bar 13 to enhance the structural strength of the mounting bracket 10. The mounting plate 17 is fixed to the top of the vertical bar 13, and the detection plate 30 can be arranged on the mounting plate 17.

[0061] In other embodiments, the mounting bracket 10 may be any other appropriate structure, such as a T-shaped bar, a rectangular block, etc., which is not limited in this embodiment.

[0062] In this embodiment, the detection device further includes a mounting pin 50, and the detection plate 30 is rotatably arranged on the mounting bracket 10 through the mounting pin 50. For example, the mounting pin 50 extends vertically, and the detection plate 30 is rotatably arranged on the mounting plate through the mounting pin 50, so that when the tightening rod 100 touches the detection plate 30, the detection plate 30 can rotate in a horizontal plane. This method can not only make the detection plate 30 rotate smoothly, but also has a simple structure and low cost.

[0063] Of course, in other embodiments, the detection plate 30 can be set on the mounting bracket 10 in other ways (such as through a rotating shaft and a bearing), as long as the detection plate 30 can be pushed and rotated by the tightening rod 100.

[0064] Optionally, in order to prevent the detection plate 30 from being too loose and easily rotating due to vibration and other factors, resulting in erroneous detection, a first groove 32 is provided on the detection plate 30, and the detection device also includes a limit plunger 60. The limit plunger 60 is provided on the mounting bracket 10, and at least a portion of the limit plunger 60 is located in the first groove 32 to limit the shaking of the detection plate 30 when it is in the initial position.

[0065] like Figure 5 As shown, the first groove 32 is arranged on the side of the detection plate 30 facing the mounting plate 17 of the mounting bracket 10, and the limit plunger 60 is arranged on the mounting plate. When the detection plate 30 is in the initial position, a part of the limit plunger 60 is located in the first groove 32. In this way, due to the stopping effect of the limit plunger 60 and the first groove 32, the detection plate 30 can be maintained in the initial position and will not rotate due to factors such as vibration. Only when the force touching the detection plate 30 exceeds a certain value, can the detection plate 30 be pushed to rotate, thereby ensuring that when the tightening rod 100 contacts the detection plate 30, the detection plate 30 can be pushed to rotate, as shown in FIG. Figure 4 The detection plate 30 is shown in the initial position ( Figure 4 The position shown in the detection plate 30) and being pushed to rotate to a certain rotation angle ( Figure 4 Schematic diagram of different states after the detection plate 30' is in the position shown in the figure.

[0066] Optionally, in order to ensure that the force pushing the detection plate 30 to rotate is appropriate, the surface of the first groove 32 is spherical, and the portion of the limit plunger 60 extending into the first groove 32 is spherical or hemispherical. In this way, when the detection plate 30 is separated from the initial position, the process of the limit plunger 60 coming out of the first groove 32 is relatively smooth, and the detection plate 30 will not be damaged.

[0067] Optionally, while ensuring that the height H of the tightening rod 100 can be detected, in order to minimize space occupation and reduce production costs, the detection plate 30 has an extension portion 331. When the detection plate 30 is in the initial position, the extension portion 331 can contact any tightening rod 100 on the vehicle assembly pallet 300 whose height is lower than a specified height. In this way, when a plurality of tightening rods 100 are provided on the vehicle assembly pallet 300 (for example, there are 5 tightening rods 100 on one side of a vehicle assembly pallet 300), the length of the extension portion 331 can ensure that any tightening rod 100 will contact the extension portion 331 when its height is lower than the specified height (for example, along the conveying direction of the conveyor line 200 ( Figure 8 The projections of the tightening rods 100 all fall on the protruding portion 331), thereby pushing the detection plate 30 to rotate. In this way, the detection plate 30 can be used for transmission. Only one alarm switch 20 can be used to detect multiple tightening rods 100 on one side of the vehicle assembly pallet 300, thereby reducing costs and avoiding the need to set an alarm switch for each tightening rod, which results in multiple problems such as high cost, complicated installation and positioning, and occupied space.

[0068] Optionally, in one embodiment, the detection plate 30 has a protruding portion 332 facing the alarm switch 20 , and the protruding portion 332 is used to trigger the alarm switch 20 , thereby reducing the length of the detection plate and thus reducing the size of the detection device.

[0069] Optionally, in order to reduce the detection cost and improve the detection accuracy, the alarm switch 20 in this embodiment can be a touch-type induction switch. Specifically, the alarm switch 20 is located on the first side of the detection plate 30, and the alarm switch 20 includes a trigger member 21. When the detection plate 30 rotates to the trigger position, it contacts the trigger member 21 to trigger the alarm switch 20.

[0070] like Figure 1 As shown, the alarm switch 20 may be a mechanical switch, which is fixedly mounted on the vertical rod 13 of the mounting bracket 10. The trigger member 21 of the mechanical switch is a rotatable structure, so that when the detection plate 30 contacts the trigger member 21, it will push it to rotate, so that the mechanical switch converts the rotation of the trigger member 21 into an electrical signal (i.e., an alarm signal) for output.

[0071] Of course, in other embodiments, the alarm switch 20 may also be a non-contact triggered alarm switch 20, such as a photoelectric switch. When the detection plate 30 rotates to the trigger position, the photoelectric switch is shielded so that the photoelectric switch cannot detect the light emitted by the light source, thereby outputting an electrical signal (i.e., an alarm signal). Alternatively, the alarm switch 20 may also be any other appropriate switch, which is not limited in this embodiment.

[0072] Optionally, since in this embodiment, the alarm switch 20 is a contact trigger, the detection plate 30 will be subjected to a reverse force applied by the alarm switch 20 when it contacts the alarm switch 20, causing the detection plate 30 to possibly rotate in the opposite direction and disengage from the alarm switch 20, making it impossible to continuously send out an alarm signal. In order to avoid this problem, the detection device also includes a check member 41, which is disposed on the mounting bracket 10 and contacts the detection plate 30, so as to keep the detection plate 30 in the trigger position in contact with the alarm switch 20 when the detection plate 30 rotates to the trigger position.

[0073] In this way, the setting of the check member 41 can prevent the detection plate 30 from being separated from the alarm switch 20, ensuring that a continuous alarm signal can be issued to prevent the staff from missing the alarm.

[0074] like Figure 6As shown, optionally, in order to facilitate the installation and positioning of the check member 41, the detection device further includes a base 42 and an elastic member, the base 42 is fixedly arranged on the mounting bracket 10, the check member 41 is arranged on the base 42, the elastic member is arranged between the check member 41 and the base 42, the check member 41 has a wedge-shaped portion 411 protruding from the upper surface of the base 42, when the detection plate 30 rotates to the trigger position, the wedge-shaped portion 411 contacts the second side surface 35 of the detection plate 30 to prevent the detection plate 30 from being out of contact with the alarm switch 20. The second side surface 35 of the detection plate 30 is opposite to the first side surface 33 thereof, and the first side surface 33 is used to contact the alarm switch 20.

[0075] The base 42 can be used to carry the check member 41 and provide a mounting position for it. Specifically, a second groove 421 is provided on the base 42, and the second groove 421 is used to install the check member 41. The check member 41 is rotatably arranged in the second groove 421. The wedge-shaped portion 411 of the check member 41 protrudes from the upper surface of the second groove 421, and an elastic member, such as a spring, is provided between the check member 41 and the groove bottom of the second groove 421. In this way, when the detection plate 30 needs to pass through the check member 41 when rotating (such as when rotating toward the alarm switch 20), the check member 41 can be pressed down to prevent the check member 41 from interfering with the rotation of the detection plate 30. When the detection plate 30 rotates, the check member 41 is bounced up, and the wedge-shaped portion 411 forms a stop for the detection plate 30 to prevent it from rotating. It should be noted that in other embodiments, the check member 41 can be other appropriate structures.

[0076] Optionally, in order to improve the compactness of the structure, when the detection plate 30 is in the initial position, the base 42 is located below the detection plate 30, and the detection plate 30 is provided with an avoidance hole 31, and the wedge-shaped portion 411 can at least partially extend into the avoidance hole 31. By providing the avoidance hole 31, the base 42 can be arranged below the detection plate 30, so that the occupied space is smaller, and the wedge-shaped portion 411 of the check member 41 is located at a position corresponding to the second side surface 35 when the detection plate 30 is in the trigger angle range, so that the check member 41 can stop the detection plate 30 without adjusting the position of the base 42, thereby making the structure of the detection device simpler and more compact.

[0077] In this case, since the check piece 41 is located below the detection plate 30 when the detection plate 30 is in the initial position, and since the height of the top of the wedge-shaped portion 411 is higher than the lower surface of the detection plate 30, an avoidance hole 31 is provided on the detection plate 30 to avoid the wedge-shaped portion 411. Moreover, when the detection plate 30 starts to rotate toward the alarm switch 20 from the initial position, since the surface of the side of the wedge-shaped portion 411 away from the alarm switch 20 is an inclined surface, the hole wall 311 of the avoidance hole 31 can contact the wedge-shaped portion 411 and press it down during the rotation of the detection plate 30, so that the detection plate 30 can smoothly rotate past the check piece 41, so that no manual intervention is required in this process, and the degree of automation is better.

[0078] It should be noted that in other embodiments, other structures may be used to prevent the detection plate 30 from returning, for example, using structures such as a non-return claw, etc., and this embodiment does not limit this.

[0079] Optionally, the rotation angle of the detection plate 30 corresponding to the touch position relative to the initial position is 30°. When the rotation angle of the detection plate 30 relative to the initial position is in the range of 30° to 40°, the detection plate 30 maintains contact with the alarm switch 20. In other words, the detection plate 30 starts to contact with the alarm switch 20 when it rotates from the initial position to a rotation angle of 30°, so that it is triggered. After that, the detection plate 30 continues to rotate until the rotation angle is 40°, and the tightening rod 100 is separated from the detection plate 30. During this process, the alarm switch 20 is always in a triggered state, so that there can be a continuous alarm signal output to avoid staff members from missing the alarm. Triggering the alarm switch 20 within this range can ensure that the length of the detection plate 30 is relatively moderate and not too long or too short, and can also ensure that the detection device is small in size and compact in structure, thereby reducing production costs.

[0080] Of course, in other embodiments, according to different needs, the trigger angle range may also be other ranges, and this embodiment does not limit this.

[0081] Optionally, the detection device further includes a positioning pin 70, which is fixedly arranged on the mounting bracket 10, and the positioning pin 70 and the alarm switch 20 are located on the same side of the detection plate 30 to limit the maximum rotatable angle of the detection plate 30. If the positioning pin 70 is not provided, when the collision force of the tightening rod 100 colliding with the detection plate 30 is too large, the detection plate 30 may rotate more than one circle, which makes the detection unstable and unreliable. In order to prevent this situation, the positioning pin 70 is provided to limit the maximum rotatable angle of the detection plate 30.

[0082] Optionally, in order to allow the staff to be informed in time when the height H of the tightening rod 100 is lower than the specified height, the alarm switch 20 is electrically connected to a display screen to display the alarm signal sent by the alarm switch 20 on the display screen. The display screen can be set in a monitoring room and used to display the alarm signal sent by the alarm switch 20 for the staff to view and to repair or replace the tightening rod 100 in time. At the same time, the staff can manually reset the detection plate 30, that is, return it to the initial position, for subsequent use.

[0083] like Figure 7 and 8 As shown, another aspect of the present application provides a vehicle assembly system. The vehicle assembly system includes a conveyor line 200, a vehicle assembly pallet 300 and a detection device. The vehicle assembly pallet 300 is arranged on the conveyor line 200 and moves along the conveyor line 200. The vehicle assembly pallet 300 is provided with a tightening rod 100. The detection device is the above-mentioned detection device, which is arranged on the conveyor line 200 to detect whether the height of the tightening rod 100 is lower than the specified height.

[0084] Through the vehicle assembly system with the detection device, thanks to the contact detection method, the failed tightening rod 100 can be detected 100%. Compared with the high-precision laser distance sensor, this method is not affected by light, detection distance, etc., and can detect accurately, with extremely high reliability, and the price is only 30% of the high-precision laser distance sensor, which is low cost. It can achieve efficient and safe online real-time detection. When the failed tightening rod 100 is detected, the staff can quickly process the failed tightening rod 100 according to the alarm signal displayed on the alarm display screen, and replace the tightening rod 100 within 5 minutes. The maintenance cost is greatly reduced, and during maintenance, only the failed spring of the tightening rod 100 can be better, without worrying that other equipment in the vehicle assembly system will be destroyed by the tightening rod 100 and cause a long production line shutdown.

[0085] When the vehicle assembly system is working: the vehicle assembly pallet 300 and the tightening rod 100 installed thereon move along the conveying direction on the conveyor line 200. When the tightening rod 100 passes the detection plate 30, if the height of the tightening rod 100 is lower than the specified height or is lower than the specified height by a certain value (such as 5 mm lower than the specified height), it will hit the protruding part 331 of the detection plate 30, and the contact force with the detection plate 30 is sufficient to disengage the first groove 32 and the limit plunger 60 of the detection plate 30, so that the detection plate 30 is pushed by the tightening rod 100 and rotates.

[0086] During the rotation of the detection plate 30 , the hole wall 311 of the avoidance hole 31 of the detection plate 30 contacts the inclined surface of the wedge-shaped portion 411 of the check member 41 , thereby pressing the check member 41 down to prevent the wedge-shaped portion 411 from preventing the detection plate 30 from rotating toward the alarm switch 20 .

[0087] When the rotation angle of the detection plate 30 reaches 30°, the alarm switch 20 is triggered and the alarm switch 20 sends out an alarm signal. At this time, the detection plate 30 completely rotates past the check member 41, the check member 41 rebounds under the action of the elastic member, and the wedge-shaped portion 411 extends to stop the detection plate 30 and prevent it from rotating in the opposite direction.

[0088] When the detection plate 30 rotates to 40°, the tightening rod 100 is separated from the detection plate 30, and the detection plate 30 is limited to the trigger angle range (i.e., 30° to 40°) by the check member 41 and the positioning pin 70. The check member 41 is used to prevent the detection plate 30 from rotating in the opposite direction, and the positioning pin 70 is used to prevent the detection plate 30 from rotating beyond the maximum rotatable angle. Within this range, the alarm switch 20 is always in a state of being triggered by the detection plate 30, thereby continuously outputting an alarm signal.

[0089] In this way, the staff can see the alarm signal on the alarm display screen in time, so as to repair the tightening rod 100 that is too low, and prevent it from continuing to move and colliding with other equipment in the vehicle assembly system to avoid damage.

[0090] According to the embodiments of the present application, the aforementioned detection device can achieve the following beneficial effects:

[0091] The detection device of this embodiment has a simple and practical structure, and can realize automatic online detection of the tightening rod 100. Moreover, due to the contact detection method of the detection plate, the detection accuracy is high, and missed detection and false detection can be fully avoided or reduced. In addition, the device is very convenient to install, disassemble and maintain, and the manufacturing cost is low. By arranging the detection device at the required position, the tightening rod 100 can be safely and reliably detected to avoid the failed tightening rod from damaging other equipment and prevent long-term production suspension (at least 2 hours of production suspension is required for repair after the damaged equipment).

[0092] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0093] The above description is only an illustrative specific implementation of the embodiment of the present application, and is not intended to limit the scope of the embodiment of the present application. Any equivalent changes, modifications and combinations made by any technician in this field without departing from the concept and principle of the embodiment of the present application should fall within the scope of protection of the embodiment of the present application.

Claims

1. A detection device, the detection device is used to detect whether the height (H) of a tightening rod (100) on a vehicle assembly pallet (300) extending downward from the vehicle assembly pallet (300) is lower than a specified height, characterized in that: The detection device comprises: Mounting bracket (10); an alarm switch (20), the alarm switch (20) being arranged on the mounting bracket (10); and A detection plate (30), the detection plate (30) being rotatably arranged on the mounting bracket (10), the height of the upper surface of the detection plate (30) corresponding to the specified height, so that when the height (H) of the tightening rod (100) is lower than the specified height, the tightening rod (100) contacts the detection plate (30) at the initial position and pushes the detection plate (30) to rotate to a triggering position for triggering the alarm switch (20), so that the alarm switch (20) sends an alarm signal, The detection device further comprises a stopper (41), wherein the stopper (41) is arranged on the mounting bracket (10). The detection plate (30) has a first side surface (33) for contacting the alarm switch (20) and a second side surface (35) opposite to the first side surface, and the detection device also includes a base (42) and an elastic member, wherein the base (42) is fixedly arranged on the mounting bracket (10), the check member (41) is arranged on the base (42), the elastic member is arranged between the check member (41) and the base (42), and the check member (41) has a wedge-shaped portion (411) protruding from the upper surface of the base (42).

2. The detection device according to claim 1, characterized in that: The alarm switch (20) is a touch-type induction switch and is located on a first side of the detection plate (30). When the detection plate (30) rotates to the trigger position, it contacts the alarm switch (20) to trigger the alarm switch (20).

3. The detection device according to claim 2, characterized in that: When the detection plate (30) rotates to the trigger position, the detection plate (30) is maintained at the trigger position in contact with the alarm switch (20).

4. The detection device according to claim 3, characterized in that: When the detection plate (30) rotates to the trigger position, the wedge-shaped portion (411) contacts the second side surface (35) of the detection plate (30) to prevent the detection plate (30) from being out of contact with the alarm switch (20).

5. The detection device according to claim 4, characterized in that: When the detection plate (30) is in the initial position, the base (42) is located below the detection plate (30), an avoidance hole (31) is provided on the detection plate (30), and the wedge-shaped portion (411) is at least partially able to extend into the avoidance hole (31).

6. The detection device according to claim 1, characterized in that: The detection plate (30) is provided with a first groove (32), and the detection device further comprises a limit plunger (60), wherein the limit plunger (60) is provided on the mounting bracket (10), and at least a portion of the limit plunger (60) is located in the first groove (32) to limit the shaking of the detection plate (30) when it is in the initial position.

7. The detection device according to claim 6, characterized in that: The surface of the first groove (32) is a spherical surface, and the portion of the limiting plunger (60) extending into the first groove (32) is spherical or hemispherical.

8. The detection device according to claim 2, characterized in that: The rotation angle of the detection plate (30) corresponding to the trigger position relative to the initial position is 30°, and when the rotation angle of the detection plate (30) relative to the initial position is in the range of 30° to 40°, the detection plate (30) maintains contact with the alarm switch (20).

9. The detection device according to claim 1, characterized in that: The detection device further comprises a positioning pin (70), wherein the positioning pin (70) is fixedly arranged on the mounting bracket (10), and the positioning pin (70) and the alarm switch (20) are located on the same side of the detection plate (30) to limit the maximum rotatable angle of the detection plate (30).

10. The detection device according to claim 1, characterized in that: The detection plate (30) has a protruding portion (331), and when the detection plate (30) is in the initial position, the protruding portion (331) can contact any one of the plurality of tightening rods (100) on the vehicle assembly pallet (300) whose height is lower than the specified height.

11. The detection device according to claim 10, characterized in that: The detection plate (30) has a protruding portion (332) facing the alarm switch (20), and the protruding portion (332) is used to trigger the alarm switch (20).

12. A vehicle assembly system, characterized in that: The vehicle assembly system comprises a conveyor line (200), a vehicle assembly pallet (300) and a detection device, wherein the vehicle assembly pallet (300) is arranged on the conveyor line (200) and is capable of moving along the conveyor line (200), and a tightening rod (100) is arranged on the vehicle assembly pallet (300), and the detection device is the detection device described in any one of claims 1 to 11, and the detection device is arranged on the conveyor line (200) to detect whether the height (H) of the tightening rod (100) is lower than a specified height.

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