AGV front chassis machining clamp

Abstract

The AGV front chassis machining clamp comprises an AGV front chassis front face and side face machining clamp and an AGV front chassis back face machining clamp, the AGV front chassis front face and side face machining clamp comprises a first bottom plate, the first bottom plate is provided with a plurality of first clamping assemblies, a plurality of first supporting pieces, a plurality of limiting pieces and a plurality of positioning pins, and the limiting pieces comprise penetrating limiting pieces; a pressure sensor is arranged on the first supporting piece; the AGV front chassis back face machining clamp comprises a second bottom plate, a lifting frame mechanism is arranged on the second bottom plate, and a limiting baffle and a material sliding rail are arranged on the lifting frame mechanism. The AGV front chassis overturning device has the advantages that the AGV front chassis can be limited, and displacement generated during overturning is avoided; pressure sensors are arranged on the first supporting piece, and whether the position of the AGV front chassis on the clamp is accurate or not can be judged through the pressure sensors; the material sliding rail is matched with the limiting baffle to realize accurate placement and avoid collision; the anti-retreating baffle and the limiting baffle are matched to limit the AGV front chassis in all directions, and displacement is avoided.

Description

Technical Field

[0001] This invention relates to the field of machining, and more particularly to a machining fixture for the front chassis of an AGV. Background Technology

[0002] In the design of AGVs (Automated Guided Vehicles), the front chassis is one of the core components, directly affecting the vehicle's navigation accuracy, load-bearing capacity, and movement stability. The machining of the AGV front chassis requires processing its front, back, and sides. Typically, this is done in two stages using two fixtures: one stage processes the front and sides of the AGV front chassis, and the other stage processes the back.

[0003] When machining the front and sides of the AGV front chassis, a four-axis machine tool is needed to rotate the fixture and the AGV front chassis. However, the AGV front chassis is usually quite heavy. During rotation, if the clamping force of the fixture is insufficient, the AGV front chassis is prone to displacement, leading to machining errors. Furthermore, the complex structure of the AGV front chassis makes it difficult to ensure its proper placement on the fixture. The front of the AGV front chassis typically has many protruding components, such as tire mounting brackets and sensor protective covers. When machining the back of the AGV front chassis, the front base plate needs to be placed face down. However, during the placement of the AGV front chassis into the fixture, these protruding components may collide with components on the fixture, causing damage to the AGV front base plate or the fixture itself. Summary of the Invention

[0004] This invention primarily solves the aforementioned problems by providing an AGV front chassis processing fixture. This fixture can limit the movement of the AGV front chassis during rotation, prevent displacement, detect the accuracy of the AGV front chassis's position on the fixture, and prevent collisions between the protruding parts on the front of the AGV front chassis and the fixture during loading.

[0005] The technical solution adopted by this invention to solve its technical problem is an AGV front chassis processing fixture, including an AGV front chassis front and side processing fixture and an AGV front chassis back processing fixture. The AGV front chassis front and side processing fixture includes a first base plate, with an AGV front chassis placement area in the middle of the first base plate. A plurality of first clamping components, a plurality of first support members, a plurality of limiting members, and a plurality of positioning pins are fixedly disposed on the first base plate. The first clamping components are arranged around the AGV front chassis placement area. The first support members are distributed in the AGV front chassis placement area. The limiting members include side limiting members and through-hole limiting members. The positioning component is located at the edge of the AGV front chassis placement area. The through-hole limiting component corresponds to the hollow area on the AGV front chassis, and the positioning pin corresponds to the through hole on the AGV front chassis. A pressure sensor is provided on the first support component. The AGV front chassis back processing fixture includes a second base plate, on which a lifting frame mechanism is provided. A mounting column is provided around the lifting frame mechanism. A second support component and a second clamping component are provided on the mounting column. The lifting frame mechanism includes a lifting component and a lifting frame driven by the lifting component. The lifting frame includes a base plate, on which a limiting baffle and a material slide rail are provided. The material slide rail is set lower than the limiting baffle.

[0006] As a preferred embodiment of the above solution, the substrate has a hollowed-out portion in the middle for the mounting post to pass through, a crossbeam is provided in the center of the hollowed-out portion, mounting plates extend outward from the first ends and the middle of both sides of the substrate, the limiting baffle is provided on the mounting plate, the material slide rail is provided on both sides of the substrate, and the lifting assembly is connected to the four corners of the substrate and the crossbeam.

[0007] As a preferred embodiment of the above solution, the lifting assembly includes a power cylinder and guide columns. The power cylinder is connected to the middle of the crossbeam, and the guide columns are connected to the four corners of the base plate.

[0008] As a preferred embodiment of the above solution, the material slide rail includes a support plate and a slide rail. The support plate is vertically mounted on the base plate, and the slide rail is mounted on the upper part of the support plate. The distance between the slide rail and the base plate is greater than the height of the highest point of the front of the AGV chassis. The material slide rail is lower than the support member when the lifting component is not raised.

[0009] As a preferred embodiment of the above solution, an anti-reverse baffle is provided on the second base plate at the second end of the corresponding substrate, and the anti-reverse baffle is flush with the limit baffle when the lifting frame mechanism is not raised.

[0010] As a preferred embodiment of the above solution, the first clamping assembly and the second clamping assembly have the same structure. The first clamping assembly includes a hydraulic cylinder, a pressure block, and a rotating plate. The pressure block includes a connected pressure arm and a drive plate. The hydraulic cylinder base is provided with a rotating connection part. The first end of the rotating plate is rotatably mounted on the rotating connection part. The lower end of the drive plate is rotatably connected to the piston rod of the hydraulic cylinder on the side away from the pressure arm. The lower end of the drive plate is rotatably connected to the second end of the rotating plate on the side close to the pressure arm.

[0011] As a preferred embodiment of the above solution, the pressure arm is located on the upper side of the drive plate, and a pressing part extends downward from the end of the pressure arm.

[0012] As a preferred embodiment of the above solution, the first support member includes a first clamping support member, a first auxiliary support member, and a first floating support member. The first clamping support member is provided in a one-to-one correspondence with the first clamping assembly. The first auxiliary support member is located at the edge and center of the AGV front chassis placement area, and the first floating support member is located in the center of the AGV front chassis placement area.

[0013] As a preferred embodiment of the above solution, the second support member includes a second clamping support member and a second floating support member. The second clamping support member corresponds one-to-one with the second clamping component, and the second floating support member is disposed on the mounting post located in the hollow space of the substrate.

[0014] As a preferred embodiment of the above solution, the side limiting component matches the edge of the AGV front chassis, and the side limiting component facing the AGV front chassis is an inclined surface that slopes from top to bottom and from the outside to the inside; the through-type limiting component matches the cutout on the AGV front chassis, and the cross-section of the through-type limiting component gradually increases from top to bottom.

[0015] The advantages of this invention are: It includes a limiting component and a positioning pin, which can limit the movement of the AGV front chassis during processing of the front and sides, preventing displacement during flipping; the first support member is equipped with pressure sensors, which can determine the accuracy of the AGV front chassis's position on the fixture by comparing the current pressure values ​​of each pressure sensor with the pressure values ​​of the AGV front chassis when it is in the correct position; it includes a lifting frame mechanism, which raises during loading, and the material slide rail, in conjunction with the limiting baffle, ensures accurate placement of the AGV front chassis and prevents collisions between the protruding parts on the front of the AGV front chassis and the parts on the fixture; and it includes an anti-reverse baffle, which, after the lifting frame mechanism descends, works with the limiting baffle to limit the AGV front chassis in all directions, preventing displacement. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the AGV when the front and side machining fixtures of the AGV are used to hold the AGV.

[0017] Figure 2 This is a schematic diagram of the machining fixtures for the front and side of the AGV front chassis.

[0018] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle.

[0019] Figure 4 A schematic diagram of the structure when the AGV is clamped by the fixture on the back of the AGV front chassis.

[0020] Figure 5 This is a schematic diagram of the machining fixture on the back of the AGV front chassis.

[0021] Figure 6 A schematic diagram of the lifting mechanism for removing the machining fixture on the back of the AGV front chassis.

[0022] Figure 7 This is a schematic diagram of the lifting frame mechanism.

[0023] 101-First base plate 102-First clamping assembly 103-Side limiting component 104-Through limiting block 105-Auxiliary support component 106-First clamping support component 107-First floating support component 108-Positioning pin 201-Second base plate 202-Mounting column 203-Second clamping assembly 204-Base plate 205-Limiting baffle 206-Material slide rail 207-Anti-reverse baffle 208-Second clamping support component 209-Second floating support component 210-Crossbeam 211-Mounting plate 212-Power cylinder 213-Guide column 1022-Pressure arm 1023-Drive plate 1024-Rotating plate 1025-Hydraulic cylinder. Detailed Implementation

[0024] The technical solution of the present invention will be further described below through embodiments and in conjunction with the accompanying drawings.

[0025] Example: This embodiment provides an AGV front chassis processing fixture, characterized in that it includes an AGV front chassis front and side processing fixture and an AGV front chassis back processing fixture. When processing the AGV front chassis, the AGV front chassis front and side processing fixture is first used to process the back and sides of the AGV front chassis, and then the AGV front chassis back processing fixture is used to process the back of the spare tire bracket.

[0026] like Figure 1 and Figure 2As shown, the AGV front chassis front and side processing fixture includes a first base plate 101. The first base plate 101 has an AGV front chassis placement area in the middle. Several first clamping components 102, several first support members, several limiting members and several positioning pins are fixedly installed on the first base plate. The first clamping components 102 are arranged around the AGV front chassis placement area. The first support members are distributed in the AGV front chassis placement area. The limiting members include side limiting members 103 and through limiting members 104. The side limiting members 103 are located at the edge of the AGV front chassis placement area. The through limiting members 104 correspond to the hollow area on the AGV front chassis. The positioning pins 108 correspond to the through holes on the AGV front chassis.

[0027] The first support components include a first clamping support 106, a first auxiliary support 105, and a first floating support 107. The first clamping support 106 is configured one-to-one with the first clamping assembly 102. The first auxiliary support 105 is located at the edge and center of the AGV front chassis placement area, and the first floating support 107 is located in the center of the AGV front chassis placement area. All first support components are equipped with pressure sensors. The pressure sensors can detect whether the AGV front chassis is correctly placed on the fixture. When the AGV chassis is placed on the fixture, all support components except the floating support will contact and support the AGV chassis. Therefore, the pressure sensors on these support components can also detect a certain pressure value. By pre-recording the pressure values ​​detected by each pressure sensor when the AGV is correctly placed, and comparing the pre-recorded pressure values ​​with the pressure values ​​when the AGV front chassis is placed, it can be determined whether the AGV front chassis is correctly placed. In addition, secondary confirmation can be performed using a floating support. The floating support is hydraulically controlled, rising to contact the front chassis of the AGV. By pre-recording the hydraulic pressure applied to the floating support, the pressure value detected by the pressure sensor on the floating support when the front chassis of the AGV is correctly placed, and the pressure change of the pressure sensors on the auxiliary and support components after the floating support contacts the front chassis of the AGV, the same hydraulic pressure is used to drive the floating support during secondary confirmation. The recorded values ​​are then compared with the pressure values ​​detected by the pressure sensors on the floating support and the pressure changes of the pressure sensors on the auxiliary and support components.

[0028] like Figure 3As shown, the clamping assembly includes a hydraulic cylinder 1025, a pressure block, and a rotating plate 1024. The pressure block includes a connected pressure arm 1022 and a drive plate 1023. The pressure arm 1022 is located on the upper side of the drive plate 1023, and a pressing part extends downward from the end of the pressure arm 1022. A rotating connection part is provided on the base of the hydraulic cylinder. The first end of the rotating plate 1024 is rotatably mounted on the rotating connection part. The lower end of the drive plate 1023, away from the pressure arm 1022, is rotatably connected to the piston rod of the hydraulic cylinder. The lower end of the drive plate 1023, near the pressure arm 1022, is rotatably connected to the second end of the rotating plate 1024. When the hydraulic cylinder 1025 retracts, the piston rod of the hydraulic cylinder drives the rotating plate 1024 to rotate towards the piston rod through the drive plate 1023, allowing the pressure arm 1022 to fully enter directly above the hydraulic cylinder, facilitating the placement of the AGV front chassis.

[0029] Furthermore, the side limiting component 3 matches the edge of the AGV front chassis, and the side limiting component 3 facing the AGV front chassis has an inclined surface that slopes from top to bottom and from the outside to the inside. The through-type limiting component 4 matches the cutout on the AGV front chassis, and the cross-section of the through-type limiting component 4 gradually increases from top to bottom. The inclined surface of the side limiting component 3 and the design of the through-type limiting component 4 (smaller at the top and larger at the bottom) facilitate the placement of the AGV front chassis, while the inclined surface and the gradually changing cross-section can guide the AGV front chassis to a certain extent, guiding the AGV to the accurate position.

[0030] In this embodiment, the front and side processing fixtures of the AGV front chassis have limiting components installed in the hollow of the AGV front chassis, and positioning pins installed in the through holes of the AGV front chassis. These can limit the movement of the AGV front chassis and prevent it from shifting when it is flipped. The support is equipped with pressure sensors. By comparing the current pressure values ​​of each pressure sensor with the pressure values ​​of the AGV front chassis when it is in the correct position, it can be determined whether the position of the AGV front chassis on the fixture is accurate.

[0031] like Figures 4 to 7 As shown, the AGV front chassis back processing fixture includes a second base plate 201, on which a lifting frame mechanism is provided. A mounting column 202 is provided around the lifting frame mechanism. A second support member and a second clamping assembly are provided on the mounting column. The lifting frame mechanism includes a lifting assembly and a lifting frame driven by the lifting assembly. The lifting frame includes a base plate 204. A limiting baffle 205 and a material slide rail 206 are provided on the base plate 204. The material slide rail 206 is set below the limiting baffle 205.

[0032] Specifically, the substrate 204 is approximately H-shaped, with a cutout in the center for the mounting column to pass through. A crossbeam 210 is located in the center of the cutout. Mounting plates 211 extend outward from the first ends and center of both sides of the substrate 204. Limiting baffles 205 are mounted on the mounting plates. Material slide rails 206 are located on both sides of the substrate. The lifting assembly is connected to the four corners of the substrate and the crossbeam. The lifting assembly includes a power cylinder 212 and a guide column 213. The power cylinder 212 is centrally located and connected to the center of the crossbeam 210. The guide column 213 is arranged around the power cylinder 212 and connected to the four corners of the substrate. The material slide rail 206 includes a support plate and a slide rail. The support plate is vertically mounted on the substrate 204, and the slide rail is located at the upper end of the support plate. The distance between the slide rail and the substrate is greater than the height of the highest point of the front of the AGV chassis. In this embodiment, the material slide rail is lower than the support member when the lifting assembly is not raised. In addition, an anti-reverse baffle 207 is provided on the second base plate at the second end of the corresponding base plate 204. The anti-reverse baffle 207 is flush with the limit baffle 205 when the lifting frame mechanism is not raised.

[0033] Specifically, the second support includes a second clamping support 208 and a second floating support 209. The clamping support 208 corresponds one-to-one with the second clamping assembly, and the second floating support 209 is disposed on a mounting post located in the hollowed-out area of ​​the substrate. The second floating support is controlled by a hydraulic system. After the second clamping assembly completes clamping of the AGV front panel, the floating support rises to provide auxiliary support for the AGV front panel. In this embodiment, the structure of the second clamping assembly is the same as that of the first clamping assembly.

[0034] In this embodiment, the AGV front chassis back processing fixture is used by first raising the lifting frame via the lifting assembly. Then, the AGV front chassis plate is pushed in along the material guide rail and abuts against the limiting baffle. At this time, due to the lifting frame being raised, the protruding parts on the front of the AGV front chassis plate will not collide with the parts on the fixture, thus protecting the AGV front chassis plate and the processing fixture. Afterward, the lifting assembly drives the lifting frame to fall. During the fall, the AGV front chassis first contacts the clamping support, providing support for the AGV front chassis. After the fall is complete, the material guide rail is located below the AGV front chassis and does not contact it, while the limiting baffle still abuts against the side of the AGV front chassis. In addition, the anti-reverse baffle on the chassis plate also abuts against the side of the AGV front chassis. The limiting baffle and the anti-reverse baffle work together to limit the movement of all sides of the AGV front chassis. Next, the clamping assembly clamps the AGV front chassis, and preferably, the hydraulic system controls the floating support to rise and provide auxiliary support for the AGV front chassis.

[0035] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A machining fixture for the front chassis of an AGV, characterized in that: This includes a front and side machining fixture for the AGV front chassis and a back machining fixture for the AGV front chassis. The front and side machining fixture for the AGV front chassis includes a first base plate with an AGV front chassis placement area in the center. Several first clamping components, several first supporting members, several limiting members, and several positioning pins are fixedly mounted on the first base plate. The first clamping components are arranged around the AGV front chassis placement area. The first supporting members are distributed within the AGV front chassis placement area. The limiting members include side limiting members and through-type limiting members. The side limiting members are located at the edge of the AGV front chassis placement area. The limiting component corresponds to the hollow area on the front chassis of the AGV, and the positioning pin corresponds to the through hole on the front chassis of the AGV. A pressure sensor is provided on the first support component. The processing fixture on the back of the AGV front chassis includes a second base plate, on which a lifting frame mechanism is provided. A mounting column is provided around the lifting frame mechanism. A second support component and a second clamping component are provided on the mounting column. The lifting frame mechanism includes a lifting component and a lifting frame driven by the lifting component. The lifting frame includes a base plate, on which a limiting baffle and a material slide rail are provided. The material slide rail is set lower than the limiting baffle.

2. The AGV front chassis machining fixture according to claim 1, characterized in that: The substrate has a cutout in the middle for the mounting post to pass through, and a crossbeam is provided in the center of the cutout. Mounting plates extend outward from the first end and the middle of both sides of the substrate. The limiting baffle is provided on the mounting plate. The material slide rail is provided on both sides of the substrate. The lifting assembly is connected to the four corners of the substrate and the crossbeam.

3. The AGV front chassis machining fixture according to claim 2, characterized in that: The lifting assembly includes a power cylinder and guide columns. The power cylinder is connected to the middle of the crossbeam, and the guide columns are connected to the four corners of the base plate.

4. The AGV front chassis machining fixture according to claim 1, characterized in that: The material guide rail includes a support plate and a guide rail. The support plate is vertically mounted on the base plate, and the guide rail is mounted on the upper part of the support plate. The distance between the guide rail and the base plate is greater than the height of the highest point of the front of the AGV chassis. The material guide rail is lower than the support plate when the lifting component is not raised.

5. The AGV front chassis machining fixture according to claim 1, characterized in that: An anti-reverse baffle is provided on the second base plate at the second end of the corresponding substrate. The anti-reverse baffle is flush with the limit baffle when the lifting frame mechanism is not raised.

6. The AGV front chassis machining fixture according to claim 1, characterized in that: The first clamping assembly and the second clamping assembly have the same structure. The first clamping assembly includes a hydraulic cylinder, a pressure block and a rotating plate. The pressure block includes a connected pressure arm and a drive plate. The hydraulic cylinder base is provided with a rotating connection part. The first end of the rotating plate is rotatably mounted on the rotating connection part. The lower end of the drive plate is rotatably connected to the piston rod of the hydraulic cylinder on the side away from the pressure arm. The lower end of the drive plate is rotatably connected to the second end of the rotating plate on the side close to the pressure arm.

7. The AGV front chassis machining fixture according to claim 6, characterized in that: The pressure arm is located on the upper side of the drive plate, and a pressing part extends downward from the end of the pressure arm.

8. The AGV front chassis machining fixture according to claim 1, characterized in that: The first support includes a first clamping support, a first auxiliary support, and a first floating support. The first clamping support is configured in a one-to-one correspondence with the first clamping assembly. The first auxiliary support is located at the edge and center of the AGV front chassis placement area, and the first floating support is located in the center of the AGV front chassis placement area.

9. The AGV front chassis machining fixture according to claim 1, characterized in that: The second support includes a second clamping support and a second floating support. The second clamping support corresponds one-to-one with the second clamping assembly, and the second floating support is disposed on the mounting post located in the hollow of the substrate.

10. The AGV front chassis machining fixture according to claim 1, characterized in that: The side limiting component matches the edge of the AGV front chassis, and the side limiting component facing the AGV front chassis has an inclined surface that slopes from top to bottom and from the outside to the inside; the through limiting component matches the cutout on the AGV front chassis, and the cross-section of the through limiting component gradually increases from top to bottom.

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