Limiting mechanism, material conveying device and PCB processing equipment

Abstract

The utility model relates to material conveying technical field discloses a limiting mechanism, material conveying device and PCB processing equipment, the limiting mechanism is suitable for installing on movable movement carrier, and the limiting mechanism includes mounting seat, limiting frame and limit switch, and the mounting seat is installed in movement carrier, and the limiting frame is rotatably connected in the mounting seat around a rotation axis, and the limit switch is installed in the limiting frame and can be electrically connected with movement carrier, and the limiting frame can drive the limit switch to switch between the trigger state of abutting with movement carrier and the isolation state of spacing from movement carrier when rotating relative to the mounting seat. The limiting mechanism can conveniently reset the limit switch.

Description

Technical Field

[0001] This utility model relates to the field of material transportation technology, and in particular to a limiting mechanism, a material transportation device, and PCB processing equipment. Background Technology

[0002] In PCB (Printed Circuit Board) manufacturing, materials are typically transported using material handling equipment.

[0003] Existing material handling equipment is equipped with safety edge switches. When these switches are impacted, they transmit a signal to the equipment's controller, which then initiates an emergency shutdown. However, these safety edge switches are expensive, difficult to reset after an impact, and prone to false alarms during subsequent use. Utility Model Content

[0004] The technical problem to be solved by this utility model is: to address the technical problem that existing safety contact switches are difficult to reset after impact and are prone to false alarms in subsequent use, this utility model provides a limit mechanism, a material transport device, and a PCB processing equipment.

[0005] To address the aforementioned technical problems, this utility model provides a limiting mechanism suitable for installation on a movable moving carrier. The limiting mechanism includes a mounting base, a limiting frame, and a limiting switch. The mounting base is installed on the moving carrier, and the limiting frame is rotatably connected to the mounting base about a rotation axis. The limiting switch is installed on the limiting frame and is electrically connected to the moving carrier. When the limiting frame rotates relative to the mounting base, it can drive the limiting switch to switch between a triggered state (contacting the moving carrier) and an isolated state (distanced from the moving carrier).

[0006] According to the limiting mechanism of this utility model embodiment, a mounting base is installed on a moving carrier, and a limiting frame is rotatably connected to the mounting base. In the initial state, the limiting frame drives the limiting switch to abut against the moving carrier in a triggered state, at which time the moving carrier can move. When the limiting frame is impacted and rotates relative to the mounting base, it can drive the limiting switch on the limiting frame away from the moving carrier, and the limiting switch switches from the triggered state to the isolated state, at which point the moving carrier stops moving. After the limiting frame moves away from the impacting object, the limiting frame can automatically rotate and reset, thereby automatically resetting the limiting switch to the triggered state. This material transport device eliminates the need for a safety contact switch, reducing costs. Simultaneously, by rotating the limiting frame to switch the limiting switch between the triggered and isolated states, the reset of the limiting switch is facilitated, resulting in good versatility and ease of installation, maintenance, and repair.

[0007] Optionally, the limiting frame includes a first part, a second part, and a third part, the third part being connected between the first part and the second part, the third part being rotatably connected to the mounting base, and the limiting switch being mounted on the first part; Along the first direction, the first part and the second part are located on opposite sides of the rotation axis; along the second direction, the first part and the second part are located on opposite sides of the rotation axis; the first part can abut against the moving carrier under the gravity of the second part. When the first part comes into contact with the moving carrier, the limit switch can come into contact with the moving carrier; The rotation axis, the first direction, and the second direction are perpendicular to each other.

[0008] Optionally, the limiting mechanism further includes an elastic element that is elastically connected between the first part and the moving carrier, and the elastic element is used to apply a force to the first part close to the moving carrier.

[0009] Optionally, the limiting frame includes a first bracket, a second bracket, and a linkage bracket, wherein the linkage bracket is connected between the first bracket and the second bracket; The mounting base includes a first support and a second support, the first support and the second support being spaced apart along the extension direction of the rotation axis, the first bracket being rotatably connected to the first support about the rotation axis, and the second bracket being rotatably connected to the second support about the rotation axis. The limit switch is installed on the first bracket.

[0010] Optionally, the first bracket includes a first connector, a first connecting plate, and a second connecting plate, wherein the first connecting plate and the second connecting plate are spaced apart along the extension direction of the rotation axis, and the first connector is connected between the first connecting plate and the second connecting plate; The first connecting plate is rotatably connected to the first support around the rotation axis, and the limit switch is installed on the second connecting plate.

[0011] Optionally, the first connecting plate includes a first limiting part, a second limiting part, and a first connecting part, wherein the first connecting part is connected between the first limiting part and the second limiting part, and the first connecting part is rotatably connected to the first support about the rotation axis; Along the first direction, the first limiting part and the second limiting part are respectively located on opposite sides of the rotation axis; along the second direction, the first limiting part and the second limiting part are respectively located on opposite sides of the rotation axis; the first limiting part can abut against the moving carrier under the gravity of the second limiting part; When the first limiting part abuts against the moving carrier, the limiting switch can abut against the moving carrier; The rotation axis, the first direction, and the second direction are perpendicular to each other.

[0012] Optionally, the second connecting plate includes a third limiting part, a fourth limiting part, and a second connecting part, wherein the second connecting part is connected between the third limiting part and the fourth limiting part; The first connector is connected between the second limiting part and the fourth limiting part, and the limit switch is installed on the third limiting part.

[0013] Optionally, the second bracket includes a second connector, a third connecting plate, and a fourth connecting plate, wherein the third connecting plate and the fourth connecting plate are spaced apart along the extension direction of the rotation axis, and the second connector is connected between the third connecting plate and the fourth connecting plate. The third connecting plate is rotatably connected to the second support around the rotation axis.

[0014] Optionally, the third connecting plate includes a fifth limiting part, a sixth limiting part, and a third connecting part, wherein the third connecting part is connected between the fifth limiting part and the sixth limiting part, and the third connecting part is rotatably connected to the second support about the rotation axis; Along the first direction, the fifth limiting part and the sixth limiting part are respectively located on opposite sides of the rotation axis; along the second direction, the fifth limiting part and the sixth limiting part are respectively located on opposite sides of the rotation axis; the fifth limiting part can abut against the moving carrier under the gravity of the sixth limiting part; When the fifth limiting part abuts against the moving carrier, the limiting switch can abut against the moving carrier; The rotation axis, the first direction, and the second direction are perpendicular to each other.

[0015] Optionally, the fourth connecting plate includes a seventh limiting part, an eighth limiting part, and a fourth connecting part, wherein the fourth connecting part is connected between the seventh limiting part and the eighth limiting part; The second connector is connected between the sixth limiting part and the eighth limiting part.

[0016] Optionally, the limiting mechanism further includes an elastic element, which is elastically connected between the seventh limiting portion and the moving carrier, and the elastic element is used to apply a force close to the moving carrier to the seventh limiting portion.

[0017] On the other hand, this utility model embodiment provides a material transport device, including a moving carrier and the aforementioned limiting mechanism. The moving carrier includes a vehicle body and a traveling mechanism. The vehicle body is used to carry materials, and the traveling mechanism is installed on the vehicle body and used to drive the vehicle body to move. The limiting mechanism is installed on at least one side of the vehicle body along the moving direction of the vehicle body, and the limiting switch is electrically connected to the walking mechanism; when the limiting frame rotates relative to the mounting base, it can drive the limiting switch to switch between a triggered state that abuts against the vehicle body and an isolated state that is separated from the vehicle body. In the triggered state, the walking mechanism can drive the vehicle body to move; in the isolated state, the walking mechanism stops driving the vehicle body.

[0018] According to an embodiment of the material transport device of this utility model, a mounting base is installed on a vehicle body, and a limit frame is rotatably connected to the mounting base. In the initial state, the limit frame drives the limit switch to abut against the vehicle body in a triggered state. At this time, the vehicle body can move under the drive of the traveling mechanism. When the limit frame is impacted and rotates relative to the mounting base, it can drive the limit switch on the limit frame away from the vehicle body, and the limit switch switches from the triggered state to the isolated state. At this time, the traveling mechanism stops driving the vehicle body, and the vehicle body stops moving. After the limit frame moves away from the impacting object, the limit frame can automatically rotate and reset, thereby automatically resetting the limit switch to the triggered state. This material transport device eliminates the need for a safety contact switch, reducing costs. Simultaneously, by rotating the limit frame to switch the limit switch between the triggered and isolated states, the reset of the limit switch is facilitated. It has good versatility and is easy to install, maintain, and repair.

[0019] Optionally, the walking mechanism is used to drive the vehicle body to move along a first direction, and the rotation axis is perpendicular to the first direction; Two limiting mechanisms are provided, and the two limiting mechanisms are respectively installed on opposite sides of the vehicle body along the first direction.

[0020] Optionally, the walking mechanism includes a drive assembly and a plurality of one-way wheels, the one-way wheels being rotatably mounted on the vehicle body, and the drive assembly being used to drive the plurality of one-way wheels to rotate synchronously, thereby causing the vehicle body to move along the first direction.

[0021] Optionally, the material transport device further includes a controller, the limit switch being electrically connected to the controller, and the controller being used to output an alarm signal when the limit switch is in an isolated state.

[0022] In another aspect, this utility model embodiment provides a PCB processing equipment, which includes the aforementioned material transport device.

[0023] According to an embodiment of the PCB processing equipment of this utility model, the material transport device has a mounting base installed on the vehicle body and a limit frame rotatably connected to the mounting base. Initially, the limit frame drives the limit switch to abut against the vehicle body in a triggered state, at which point the vehicle body can move under the drive of the traveling mechanism. When the limit frame is impacted and rotates relative to the mounting base, it can drive the limit switch on the limit frame away from the vehicle body, and the limit switch switches from the triggered state to the isolated state. At this time, the traveling mechanism stops driving the vehicle body, and the vehicle body stops moving. After the limit frame moves away from the impacting object, the limit frame can automatically rotate and reset, thereby automatically resetting the limit switch to the triggered state. This material transport device eliminates the need for a safety contact switch, reducing costs. Simultaneously, by rotating the limit frame to switch the limit switch between the triggered and isolated states, the reset of the limit switch is facilitated, resulting in good versatility and ease of installation, maintenance, and repair. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a material transport device provided in an embodiment of the present invention; Figure 2 yes Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of a material transport device provided in one embodiment of the present invention from another angle; Figure 4 yes Figure 3 Enlarged view of point B in the middle; Figure 5 yes Figure 3 Enlarged view of point C in the middle; Figure 6 yes Figure 3 A schematic diagram of the middle limit mechanism.

[0025] The reference numerals in the accompanying drawings are as follows: 1. Vehicle body; 2. Walking mechanism; 21. Drive assembly; 211. Drive motor; 212. Drive rod; 22. One-way wheel; 3. Limiting mechanism; 31. Mounting base; 311. First support; 312. Second support; 32. Limiting frame; 32a. First part; 32b. Second part; 32c. Third part; 321. First bracket; 3211. First connecting piece; 3212. First connecting plate; 32121. First limiting part; 32122. Second limiting part; 32123. First connecting part; 3213. Second connecting plate; 32131. Third limiting part; 32132. Fourth limiting part; 32133. Second limiting part 322. Connecting part; 3221. Second bracket; 3222. Second connecting piece; 3222. Third connecting plate; 32221. Fifth limiting part; 32222. Sixth limiting part; 32223. Third connecting part; 3223. Fourth connecting plate; 32231. Seventh limiting part; 32232. Eighth limiting part; 32233. Fourth connecting part; 323. Linkage bracket; 33. Limit switch; 34. First pin; 35. Second rolling bearing; 36. Second snap ring; 37. Second pin; 38. Elastic element; x, first direction; z, second direction; y, third direction; s1, first rotation direction; s2, second rotation direction. Detailed Implementation

[0026] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] like Figures 1 to 6 As shown, the material transport device provided in this embodiment of the present invention includes a moving carrier and two limiting mechanisms 3. The moving carrier includes a vehicle body 1 and a traveling mechanism 2. The vehicle body 1 is used to carry materials, and the traveling mechanism 2 is installed on the vehicle body 1. The traveling mechanism 2 can drive the vehicle body 1 to move along the first direction x.

[0028] Two limiting mechanisms 3 are respectively installed on opposite sides of the vehicle body 1 along the first direction x. Each limiting mechanism 3 includes a mounting base 31, a limiting frame 32, and a limiting switch 33. The mounting base 31 is installed on the vehicle body 1, the limiting frame 32 is rotatably connected to the mounting base 31, and the limiting switch 33 is installed on the limiting frame 32 and communicatively connected to the traveling mechanism 2. The rotation axis of the limiting frame 32 intersects the first direction x. Figure 1 and Figure 3 As shown, for ease of understanding, the extension direction of the rotation axis L of the limiting frame 32 is marked as the third direction y. For example, the rotation axis L of the limiting frame 32 may be perpendicular to the first direction x.

[0029] When the limit bracket 32 ​​rotates relative to the mounting base 31, it can drive the limit switch 33 to switch between a triggered state that abuts against the vehicle body 1 and an isolated state that is separated from the vehicle body 1. For example, as shown... Figure 2 As shown, when the limit frame 32 rotates along the first rotation direction s1, it can drive the limit switch 33 to switch to the trigger state that abuts against the vehicle body 1. When the limit frame 32 rotates along the second rotation direction s2, it can drive the limit switch 33 to switch to the isolation state that is separated from the vehicle body 1. The first rotation direction s1 and the second rotation direction s2 are opposite, and both the first rotation direction s1 and the second rotation direction s2 are perpendicular to the rotation axis L.

[0030] In the triggered state, the walking mechanism 2 can drive the vehicle body 1 to move. In the isolated state, the walking mechanism 2 stops driving the vehicle body 1.

[0031] The material transport device provided in this embodiment of the utility model has a mounting base 31 installed on a vehicle body 1, and a limit frame 32 rotatably connected to the mounting base 31. In the initial state, the limit frame 32 drives the limit switch 33 to abut against the vehicle body 1 in a triggered state. At this time, the vehicle body 1 can move along the first direction x under the drive of the traveling mechanism 2. When the limit frame 32 is impacted and rotates relative to the mounting base 31, it can drive the limit switch 33 on the limit frame 32 away from the vehicle body 1, and the limit switch 33 switches from the triggered state to the isolated state. At this time, the traveling mechanism 2 stops driving the vehicle body 1, and the vehicle body 1 stops moving. After the limit frame 32 is away from the impacting object, the limit frame 32 can automatically rotate and reset, thereby automatically resetting the limit switch 33 to the triggered state. This material transport device eliminates the need for a safety contact switch, reducing costs. Simultaneously, by rotating the limit frame 32 to switch the limit switch 33 between the triggered and isolated states, the reset of the limit switch 33 is facilitated. It has good versatility and is easy to install, maintain, and repair.

[0032] In other embodiments not shown in the figure, the moving vehicle may consist only of a vehicle body, in which case the vehicle body can be moved manually by pushing it.

[0033] In other embodiments not shown in the figures, the direction of movement of the vehicle body is not limited to the first direction, but can be any direction intersecting the first direction. In this case, the limiting mechanism is installed on at least one side of the vehicle body along the direction of movement of the vehicle body. For example, if the vehicle body adopts a caster wheel structure, then the limiting mechanism can be provided on each side of the vehicle body.

[0034] In one embodiment, such as Figure 2 As shown, the limit frame 32 includes a first part 32a, a second part 32b and a third part 32c. The third part 32c is connected between the first part 32a and the second part 32b. The third part 32c is rotatably connected to the mounting base 31. The limit switch 33 is installed on the first part 32a.

[0035] Along the first direction x, the first part 32a and the second part 32b are located on opposite sides of the rotation axis L, with the first part 32a positioned between the vehicle body 1 and the second part 32b. Along the second direction z, the first part 32a and the second part 32b are located on opposite sides of the rotation axis L. The first part 32a can come into contact with the vehicle body 1 of the moving carrier under the influence of gravity from the second part 32b.

[0036] When the first part 32a comes into contact with the vehicle body 1, the limit switch 33 can come into contact with the vehicle body 1.

[0037] The rotation axis L, the first direction x, and the second direction z are perpendicular to each other.

[0038] For example, the second direction z is the height direction of the material transport device, the first part 32a is located below the second part 32b, the angle between the first part 32a and the second part 32b is an obtuse angle less than 180°, and the angle between the first part 32a and the second part 32b is set away from the vehicle body 1.

[0039] Since the first part 32a can abut against the vehicle body 1 under the gravity of the second part 32b, the limit switch 33 installed on the limit mechanism 3 can abut against the vehicle body 1 and be in a triggered state when the limit mechanism 3 is not impacted. When the limit mechanism 3 is impacted, the second part 32b rotates along the second rotation direction s2 to drive the first part 32a away from the vehicle body 1, thereby driving the limit switch 33 away from the vehicle body 1 and switching to the isolation state.

[0040] In one embodiment, the limiting mechanism 3 further includes an elastic element 38, which is elastically connected between the first part 32a and the vehicle body 1. The elastic element 38 is used to apply a force to the first part 32a that is close to the vehicle body 1 of the moving carrier.

[0041] By setting an elastic element 38 between the first part 32a and the vehicle body 1, and by applying a force close to the vehicle body 1 to the first part 32a by the elastic element 38, the first part 32a can remain in contact with the vehicle body 1 when the limit frame 32 does not collide, thus preventing the limit switch 33 from malfunctioning due to inertial force during the start-up or emergency braking phase of the vehicle.

[0042] In other embodiments not shown in the figures, the elastic element can also be elastically connected between the second part and the vehicle body. In this case, the elastic element is used to apply a force away from the vehicle body to the second part.

[0043] In one embodiment, such as Figures 4 to 6 As shown, the limiting frame 32 includes a first bracket 321, a second bracket 322, and a linkage bracket 323, with the linkage bracket 323 connected between the first bracket 321 and the second bracket 322.

[0044] Mounting base 31 includes a first support 311 and a second support 312. The first support 311 and the second support 312 are spaced apart along the extension direction of the rotation axis L. The first bracket 321 is rotatably connected to the first support 311 about the rotation axis L, and the second bracket 322 is rotatably connected to the second support 312 about the rotation axis L.

[0045] Limit switch 33 is mounted on first bracket 321.

[0046] For example, the limiting mechanism 3 may include a first rolling bearing, a first retaining ring, and a first pin 34. The outer ring of the first rolling bearing is mounted on the first support 311. The rod of the first pin 34 passes through the first bracket 321 and the inner ring of the first rolling bearing in sequence and is connected to the first retaining ring. Thus, the first pin 34 can rotate relative to the first support 311, and the first retaining ring can cooperate with the first pin 34 to prevent the first bracket 321 from disengaging from the first support 311.

[0047] Furthermore, the limiting mechanism 3 may also include a second rolling bearing 35, a second retaining ring 36, and a second pin 37. The outer ring of the second rolling bearing 35 is mounted on the second support 312. The rod of the second pin 37 passes through the second bracket 322 and the inner ring of the second rolling bearing 35 in sequence and is connected to the second retaining ring 36. Thus, the second pin 37 can rotate relative to the second support 312, and the second retaining ring 36 can cooperate with the second pin 37 to prevent the second bracket 322 from disengaging from the second support 312.

[0048] By rotatably connecting the first bracket 321 and the second bracket 322 to the first support 311 and the second support 312 respectively, the rotatable connection of the limiting frame 32 relative to the mounting base 31 is achieved.

[0049] In other embodiments not shown in the figure, the mounting base may also be an integral structure, in which case the first support and the second support are connected by a connecting structure (such as a connecting plate).

[0050] In one embodiment, such as Figures 4 to 6 As shown, the first bracket 321 includes a first connector 3211, a first connecting plate 3212 and a second connecting plate 3213. The first connecting plate 3212 and the second connecting plate 3213 are spaced apart along the extension direction of the rotation axis L. The first connector 3211 is connected between the first connecting plate 3212 and the second connecting plate 3213.

[0051] The first connecting plate 3212 is rotatably connected to the first support 311 around the rotation axis L, and the limit switch 33 is installed on the second connecting plate 3213.

[0052] The first bracket 321 is composed of a first connector 3211, a first connecting plate 3212, and a second connecting plate 3213. The first bracket 321 is installed on the first support 311 by rotating the first connecting plate 3212 to the first support 311. At the same time, the first bracket 321 can be installed on the limit switch 33 through the second connecting plate 3213. Since the first connecting plate 3212 and the second connecting plate 3213 are connected to different structures respectively, mutual interference between the first support 311 and the limit switch 33 can be avoided.

[0053] In one embodiment, such as Figures 4 to 6 As shown, the first connecting plate 3212 includes a first limiting part 32121, a second limiting part 32122 and a first connecting part 32123. The first connecting part 32123 is connected between the first limiting part 32121 and the second limiting part 32122, and the first connecting part 32123 is rotatably connected to the first support 311 about the rotation axis L.

[0054] Along the first direction x, the first limiting part 32121 and the second limiting part 32122 are located on opposite sides of the rotation axis L. Along the second direction z, the first limiting part 32121 and the second limiting part 32122 are located on opposite sides of the rotation axis L. The first limiting part 32121 can abut against the vehicle body 1 of the moving carrier under the gravity of the second limiting part 32122.

[0055] When the first limiting part 32121 comes into contact with the vehicle body 1, the limiting switch 33 can come into contact with the vehicle body 1.

[0056] For example, the first limiting part 32121 is located below the second limiting part 32122, and the angle between the first limiting part 32121 and the second limiting part 32122 is an obtuse angle of less than 180°.

[0057] The first part 32a includes a first limiting part 32121, the second part 32b includes a second limiting part 32122, and the third part 32c includes a first connecting part 32123.

[0058] The first connecting plate 3212 is roughly L-shaped. The short side of the L-shaped structure can serve as the first limiting part 32121, and the long side of the L-shaped structure can serve as the second limiting part 32122. The angle between the first limiting part 32121 and the second limiting part 32122 is set away from the vehicle body 1. Thus, the first limiting part 32121 can abut against the vehicle body 1 under the gravity of the second limiting part 32122.

[0059] Since the first limiting part 32121 can abut against the vehicle body 1 under the gravity of the second limiting part 32122, the limit switch 33 installed on the limiting mechanism 3 can abut against the vehicle body 1 and be in a triggered state when the limiting mechanism 3 is not impacted. When the limiting mechanism 3 is impacted, the second limiting part 32122 rotates in the second rotation direction s2 to drive the first limiting part 32121 away from the vehicle body 1, thereby driving the limit switch 33 away from the vehicle body 1 and switching to the isolation state.

[0060] In one embodiment, such as Figures 4 to 6 As shown, the structure of the second connecting plate 3213 can be the same as that of the first connecting plate 3212 to simplify the structure of the limiting frame 32. Specifically, the second connecting plate 3213 may include a third limiting part 32131, a fourth limiting part 32132, and a second connecting part 32133, with the second connecting part 32133 connecting between the third limiting part 32131 and the fourth limiting part 32132.

[0061] The first connector 3211 is connected between the second limit part 32122 and the fourth limit part 32132, and the limit switch 33 is installed on the third limit part 32131.

[0062] For example, the first part 32a includes a third limiting part 32131, the second part 32b includes a fourth limiting part 32132, and the third part 32c includes a second connecting part 32133.

[0063] By connecting the first connector 3211 between the second limiting part 32122 and the fourth limiting part 32132, the first connector 3211 is connected to the first connecting plate 3212 and the second connecting plate 3213. By installing the limit switch 33 on the second connecting plate 3213, the limit switch 33 is installed on the third limiting part 32131.

[0064] In one embodiment, such as Figures 4 to 6 As shown, the structure of the second bracket 322 can be the same as that of the first bracket 321. Specifically, the second bracket 322 includes a second connector 3221, a third connecting plate 3222, and a fourth connecting plate 3223. The third connecting plate 3222 and the fourth connecting plate 3223 are spaced apart along the extension direction of the rotation axis L, and the second connector 3221 is connected between the third connecting plate 3222 and the fourth connecting plate 3223.

[0065] The third connecting plate 3222 is rotatably connected to the second support 312 around the rotation axis L.

[0066] The second bracket 322 is composed of a second connector 3221, a third connecting plate 3222 and a fourth connecting plate 3223. The second bracket 322 is rotatably connected to the second support 312 through the third connecting plate 3222, so that the second bracket 322 can be installed on the second support 312.

[0067] In one embodiment, such as Figures 4 to 6 As shown, the third connecting plate 3222 includes a fifth limiting part 32221, a sixth limiting part 32222 and a third connecting part 32223. The third connecting part 32223 is connected between the fifth limiting part 32221 and the sixth limiting part 32222. The third connecting part 32223 is rotatably connected to the second support 312 about the rotation axis L.

[0068] Along the first direction x, the fifth limiting part 32221 and the sixth limiting part 32222 are located on opposite sides of the rotation axis L. Along the second direction z, the fifth limiting part 32221 and the sixth limiting part 32222 are located on opposite sides of the rotation axis L. The fifth limiting part 32221 can abut against the vehicle body 1 of the moving carrier under the gravity of the sixth limiting part 32222.

[0069] When the fifth limiting part 32221 comes into contact with the vehicle body 1, the first limiting part 32121 comes into contact with the vehicle body 1, and the limit switch 33 can come into contact with the vehicle body 1.

[0070] For example, the fifth limiting part 32221 is located below the sixth limiting part 32222, and the angle between the fifth limiting part 32221 and the sixth limiting part 32222 is an obtuse angle of less than 180°.

[0071] The angle between the fifth limiting part 32221 and the sixth limiting part 32222 is set away from the vehicle body 1, so that the fifth limiting part 32221 can abut against the vehicle body 1 under the gravity of the sixth limiting part 32222.

[0072] For example, the first part 32a includes a fifth limiting part 32221, the second part 32b includes a sixth limiting part 32222, and the third part 32c includes a third connecting part 32223.

[0073] Since the fifth limiting part 32221 can abut against the vehicle body 1 under the gravity of the sixth limiting part 32222, the limit switch 33 installed on the limiting mechanism 3 can abut against the vehicle body 1 and be in a triggered state when the limiting mechanism 3 is not impacted. When the limiting mechanism 3 is impacted, the sixth limiting part 32222 rotates in the second rotation direction s2 to drive the fifth limiting part 32221 away from the vehicle body 1.

[0074] In one embodiment, such as Figures 4 to 6As shown, the structure of the fourth connecting plate 3223 can be the same as that of the third connecting plate 3222. The fourth connecting plate 3223 includes a seventh limiting part 32231, an eighth limiting part 32232 and a fourth connecting part 32233, and the fourth connecting part 32233 is connected between the seventh limiting part 32231 and the eighth limiting part 32232.

[0075] The second connector 3221 is connected between the sixth limiting part 32222 and the eighth limiting part 32232.

[0076] For example, the first part 32a includes a seventh limiting part 32231, the second part 32b includes an eighth limiting part 32232, and the third part 32c includes a fourth connecting part 32233.

[0077] By connecting the second connector 3221 between the sixth limiting part 32222 and the eighth limiting part 32232, the connection between the second connector 3221 and the third connecting plate 3222 and the fourth connecting plate 3223 is realized.

[0078] In one embodiment, such as Figures 4 to 6 As shown, the limiting mechanism 3 also includes an elastic member 38, which is elastically connected between the seventh limiting part 32231 and the vehicle body 1 of the moving carrier. The elastic member 38 is used to apply a force close to the vehicle body 1 to the seventh limiting part 32231.

[0079] By providing an elastic member 38 between the seventh limiting part 32231 and the vehicle body 1, and by applying a force close to the vehicle body 1 to the seventh limiting part 32231 by the elastic member 38, the fifth limiting part 32221 and the first limiting part 32121 can remain in contact with the vehicle body 1 when the limiting frame 32 does not collide. Simultaneously, since the third connecting plate 3222 and the fourth connecting plate 3223 are connected to different structures respectively, interference between the second support 312 and the elastic member 38 can be avoided.

[0080] In one embodiment, the second limiting part 32122, the fourth limiting part 32132, the linkage bracket 323, the sixth limiting part 32222, and the eighth limiting part 32232 constitute the first part 32a of the limiting frame 32, the first connecting part 32123, the second connecting part 32133, the third connecting part 32223, and the fourth connecting part 32233 constitute the third part 32c of the limiting frame 32, and the first limiting part 32121, the third limiting part 32131, the fifth limiting part 32221, and the seventh limiting part 32231 constitute the second part 32b of the limiting frame 32.

[0081] In one embodiment, such as Figure 3As shown, the walking mechanism 2 includes a drive assembly 21 and a plurality of one-way wheels 22. The one-way wheels 22 are rotatably mounted on the vehicle body 1. The drive assembly 21 is used to drive the plurality of one-way wheels 22 to rotate synchronously, so as to move the vehicle body 1 along the first direction x.

[0082] For example, the drive assembly 21 may include a drive motor 211 and a drive rod 212. The drive motor 211 is mounted on the vehicle body 1, and its output shaft is connected to the drive rod 212. The drive motor 211 drives the drive rod 212 to rotate. A one-way wheel 22 is connected to each end of the drive rod 212, so that the rotation of the drive rod 212 drives the one-way wheels 22 to rotate in one direction. Because a one-way wheel 22 is connected to each end of the drive rod 212, the movement of the material transport device is smoother.

[0083] The drive assembly 21 drives the one-way wheel 22 to move the vehicle body 1 along the first direction x, thereby realizing material conveying.

[0084] In one embodiment, the material transport device further includes a controller, and the limit switch 33 is communicatively connected to the controller. The controller is used to output an alarm signal when the limit switch 33 is in an isolated state to remind the user.

[0085] For example, the alarm signal can be a traffic light, an alarm sound, etc.

[0086] For example, the limit switch 33 is provided with a flexible lever, a normally open contact and a normally closed contact. The normally closed contact is connected to the drive component 21 of the walking mechanism 2 by a wire, and the normally open contact is connected to the controller by a wire.

[0087] When limit switch 33 is in the triggered state, the elastic lever contacts the normally closed contact, closing the normally closed contact and opening the normally open contact. At this time, the traveling mechanism 2 can drive the vehicle body 1 to move. When the limit bracket 32 ​​is impacted and rotates relative to the mounting base 31, limit switch 33 switches to the isolated state. The elastic lever moves away from the normally closed contact and contacts the normally open contact, causing the normally open contact to close and the normally closed contact to open. At this time, the traveling mechanism 2 stops driving the vehicle body 1 to move, and the controller outputs an alarm signal.

[0088] This utility model embodiment also provides a PCB processing equipment, which includes the above-mentioned material transport device.

[0089] According to an embodiment of the PCB processing equipment of this utility model, the material transport device has a mounting base 31 mounted on a vehicle body 1, and a limit frame 32 rotatably connected to the mounting base 31. Initially, the limit frame 32 drives the limit switch 33 to abut against the vehicle body 1 in a triggered state. At this time, the vehicle body 1 can move under the drive of the traveling mechanism 2. When the limit frame 32 is impacted and rotates relative to the mounting base 31, it can drive the limit switch 33 on the limit frame 32 away from the vehicle body 1, and the limit switch 33 switches from the triggered state to the isolated state. At this time, the traveling mechanism 2 stops driving the vehicle body 1, and the vehicle body 1 stops moving. After the limit frame 32 moves away from the impacting object, the limit frame 32 can automatically rotate and reset, thereby automatically resetting the limit switch 33 to the triggered state. This material transport device eliminates the need for a safety contact switch, reducing costs. Simultaneously, by rotating the limit frame 32 to switch the limit switch 33 between the triggered and isolated states, the reset of the limit switch 33 is facilitated. It has good versatility and is easy to install, maintain, and repair.

[0090] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A limiting mechanism, characterized in that, Suitable for installation on a movable moving carrier, the limiting mechanism includes a mounting base, a limiting frame, and a limiting switch. The mounting base is installed on the moving carrier, and the limiting frame is rotatably connected to the mounting base about a rotation axis. The limiting switch is installed on the limiting frame and can be electrically connected to the moving carrier. When the limiting frame rotates relative to the mounting base, it can drive the limiting switch to switch between a triggered state that abuts against the moving carrier and an isolated state that is spaced apart from the moving carrier.

2. The limiting mechanism according to claim 1, characterized in that, The limiting frame includes a first part, a second part, and a third part. The third part is connected between the first part and the second part and is rotatably connected to the mounting base. The limit switch is installed on the first part. Along the first direction, the first part and the second part are located on opposite sides of the rotation axis; Along the second direction, the first part and the second part are located on opposite sides of the rotation axis; the first part can abut against the moving carrier under the gravity of the second part. When the first part comes into contact with the moving carrier, the limit switch can come into contact with the moving carrier; The rotation axis, the first direction, and the second direction are perpendicular to each other.

3. The limiting mechanism according to claim 2, characterized in that, The limiting mechanism further includes an elastic element, which is elastically connected between the first part and the moving carrier. The elastic element is used to apply a force to the first part close to the moving carrier.

4. The limiting mechanism according to claim 1, characterized in that, The limiting frame includes a first bracket, a second bracket, and a linkage bracket, wherein the linkage bracket is connected between the first bracket and the second bracket; The mounting base includes a first support and a second support, the first support and the second support being spaced apart along the extension direction of the rotation axis, the first bracket being rotatably connected to the first support about the rotation axis, and the second bracket being rotatably connected to the second support about the rotation axis. The limit switch is installed on the first bracket.

5. The limiting mechanism according to claim 4, characterized in that, The first bracket includes a first connector, a first connecting plate, and a second connecting plate. The first connecting plate and the second connecting plate are spaced apart along the extension direction of the rotation axis, and the first connector is connected between the first connecting plate and the second connecting plate. The first connecting plate is rotatably connected to the first support around the rotation axis, and the limit switch is installed on the second connecting plate.

6. The limiting mechanism according to claim 5, characterized in that, The first connecting plate includes a first limiting part, a second limiting part, and a first connecting part. The first connecting part is connected between the first limiting part and the second limiting part, and the first connecting part is rotatably connected to the first support around the rotation axis. Along the first direction, the first limiting part and the second limiting part are respectively located on opposite sides of the rotation axis; along the second direction, the first limiting part and the second limiting part are respectively located on opposite sides of the rotation axis; the first limiting part can abut against the moving carrier under the gravity of the second limiting part; When the first limiting part abuts against the moving carrier, the limiting switch can abut against the moving carrier; The rotation axis, the first direction, and the second direction are perpendicular to each other.

7. The limiting mechanism according to claim 6, characterized in that, The second connecting plate includes a third limiting part, a fourth limiting part, and a second connecting part, wherein the second connecting part is connected between the third limiting part and the fourth limiting part; The first connector is connected between the second limiting part and the fourth limiting part, and the limit switch is installed on the third limiting part.

8. The limiting mechanism according to claim 4, characterized in that, The second bracket includes a second connector, a third connecting plate, and a fourth connecting plate. The third connecting plate and the fourth connecting plate are spaced apart along the extension direction of the rotation axis. The second connector is connected between the third connecting plate and the fourth connecting plate. The third connecting plate is rotatably connected to the second support around the rotation axis.

9. The limiting mechanism according to claim 8, characterized in that, The third connecting plate includes a fifth limiting part, a sixth limiting part, and a third connecting part. The third connecting part is connected between the fifth limiting part and the sixth limiting part, and the third connecting part is rotatably connected to the second support around the rotation axis. Along the first direction, the fifth limiting part and the sixth limiting part are respectively located on opposite sides of the rotation axis; along the second direction, the fifth limiting part and the sixth limiting part are respectively located on opposite sides of the rotation axis; the fifth limiting part can abut against the moving carrier under the gravity of the sixth limiting part; When the fifth limiting part abuts against the moving carrier, the limiting switch can abut against the moving carrier; The rotation axis, the first direction, and the second direction are perpendicular to each other.

10. The limiting mechanism according to claim 9, characterized in that, The fourth connecting plate includes a seventh limiting part, an eighth limiting part, and a fourth connecting part, wherein the fourth connecting part is connected between the seventh limiting part and the eighth limiting part; The second connector is connected between the sixth limiting part and the eighth limiting part.

11. The limiting mechanism according to claim 9, characterized in that, The limiting mechanism further includes an elastic element, which is elastically connected between the seventh limiting part and the moving carrier. The elastic element is used to apply a force close to the moving carrier to the seventh limiting part.

12. A material conveying device, characterized in that, The invention includes a motion carrier and a limiting mechanism as described in any one of claims 1-11. The motion carrier includes a vehicle body and a traveling mechanism. The vehicle body is used to carry materials, and the traveling mechanism is installed on the vehicle body to drive the vehicle body to move. The limiting mechanism is installed on at least one side of the vehicle body along the moving direction of the vehicle body, and the limiting switch is electrically connected to the walking mechanism; when the limiting frame rotates relative to the mounting base, it can drive the limiting switch to switch between a triggered state that abuts against the vehicle body and an isolated state that is separated from the vehicle body. In the triggered state, the walking mechanism can drive the vehicle body to move; in the isolated state, the walking mechanism stops driving the vehicle body.

13. The material conveying device according to claim 12, characterized in that, The walking mechanism is used to drive the vehicle body to move along a first direction, and the rotation axis is perpendicular to the first direction; Two limiting mechanisms are provided, and the two limiting mechanisms are respectively installed on opposite sides of the vehicle body along the first direction.

14. The material conveying device according to claim 13, characterized in that, The walking mechanism includes a drive assembly and a plurality of one-way wheels. The one-way wheels are rotatably mounted on the vehicle body. The drive assembly is used to drive the plurality of one-way wheels to rotate synchronously, so as to move the vehicle body along the first direction.

15. The material conveying device according to claim 12, characterized in that, The material transport device also includes a controller, and the limit switch is electrically connected to the controller. The controller is used to output an alarm signal when the limit switch is in an isolated state.

16. A PCB processing equipment, characterized in that, Includes the material transport device according to any one of claims 12-15.

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