Switching mechanism for roller bed welding production line trolley

Abstract

The present invention discloses a switching mechanism for a trolley of a roller bed type welding production line, comprising the following components: a trolley device, a track and a first driving component; compared with the prior art which requires manual transport of the trolley, the present invention is provided with a track connecting a roller bed trolley switching station and storage areas for trolleys of different models; the first driving component can drive the trolley device to reciprocate along the track between the trolley switching station and each trolley storage area of ​​the welding production line, and the trolley can be grabbed and released with the help of an extraction component, so that the automatic replacement of the trolley on the welding production line can be realized without manual operation, thereby reducing the labor cost; and the extraction component on the trolley device in the present invention grabs the trolley in a vertical direction and places the trolley on the roller bed of the welding production line in a vertical direction, thereby greatly reducing the wear of the roller of the roller bed caused by the trolley being taken and placed, thereby increasing the service life of the roller bed.

Description

Technical Field

[0001] The invention relates to the technical field of high-speed roller bed conveying welding production line, and in particular to a switching mechanism for a roller bed type welding production line trolley. Background Art

[0002] Automated spot welding is to use robots or special equipment to perform spot welding operations through automated program control. Due to different digital model designs of products, the welding positioning points and clamping positions during product production are not the same. In order to ensure the quality of welding, the GD&T diagram is determined through process analysis, and welding is carried out in different processes. Different positioning points and clamping points need to be set for each process, and the welding gun must be accessible, and then the corresponding welding parameters are matched to finally produce qualified products.

[0003] Different positioning points and clamping points are designed differently during the production process of products, which leads to different positioning and clamping mechanisms of corresponding welding fixtures. At present, the commonly used method is to design a complete set of fixtures and a conveyor vehicle (also known as a trolley, hereinafter referred to as a trolley) that is fastened and moved with it for one product. Different products correspond to different fixtures and trolleys of the same specifications. When the product is switched, the fixture and trolley are quickly switched as a whole. Because the fixture and the trolley are already integrated, for the convenience of description, it is referred to as a trolley. Although this increases the cost, it is more efficient and less prone to errors.

[0004] In the prior art, the transportation and conversion of the trolleys are usually achieved through high-speed roller beds and manually pushed mobile trolleys. The number of trolleys is the same as the number of manually pushed mobile trolleys, and the mobile trolleys are equipped with unpowered friction rollers. When replacing the trolley, the mobile trolley is pushed to the head end of the high-speed roller bed and aligned, and the trolley to be replaced is manually pushed or pulled onto the mobile trolley. During the pushing process, the trolley moves along the guide mechanism to ensure that it does not deviate. After it is in place, the pin placed on the mobile trolley is manually removed and inserted into the positioning holes that have overlapped on the trolley and the mobile trolley to prevent the trolley from moving and sliding to the ground during the pushing process of the mobile trolley.

[0005] The trolley is manually pushed or pulled to the trolley storage bracket on the ground storage area in the production workshop, the hydraulic lift truck descends, and the trolley falls on the trolley storage bracket for storage. Another product trolley is already stored on another bracket, the hydraulic lift truck moves in, rises, lifts up the trolley, detaches from the trolley storage bracket, pushes or pulls the hydraulic lift truck to the high-speed roller bed production line, and then manually operates the electric hoist and sling that can be raised and lowered to transfer it to the high-speed roller bed.

[0006] Since the trolley and the fixture thereon are heavy (generally more than 500 kg), it is laborious to manually push the trolley onto the transfer trolley, and it is laborious to move the trolley together with the mobile trolley.

[0007] In addition, when manually dragging or pushing the trolley from the high-speed roller bed, it is inevitable to generate impact force on the high-speed roller bed. This impact force will cause uneven force on the friction rollers on the high-speed roller bed, causing deformation and affecting the performance of the high-speed roller bed.

[0008] Therefore, providing a switching mechanism that saves effort in switching trolleys and causes little damage to high-speed roller beds is a technical problem that needs to be urgently solved by technicians in this field. Summary of the invention

[0009] The present invention provides a switching mechanism for a roller bed type welding production line trolley, comprising the following components:

[0010] The trolley device comprises a trolley body and an extracting component arranged on the trolley body, wherein the extracting component is used to lock or unlock the trolley to the trolley body, and the extracting component lifts the trolley from the roller bed or places it on the roller bed in a vertical direction;

[0011] Tracks are arranged between the trolley switching station of the roller bed and the storage area for trolleys of different models;

[0012] The first driving component is used to drive the trolley body to reciprocate along the track between the trolley switching station of the roller bed and the storage area of ​​the trolley.

[0013] Compared with the prior art, the present invention is provided with a track connecting the roller bed trolley switching station and the storage areas of trolleys of different models. The first driving component can drive the trolley device to reciprocate along the track between the trolley switching station and each trolley storage area of ​​the welding production line, and the trolley can be grabbed and released with the help of the extraction component, and the automatic replacement of the trolley on the welding production line can be realized without manual operation, thereby reducing labor costs. In addition, the extraction component grabs the trolley in the vertical direction and places the trolley on the roller bed in the vertical direction, which greatly reduces the wear of the roller wheel of the roller bed caused by the trolley picking and placing, and improves the service life of the roller bed.

[0014] Optionally, the extraction component includes at least one pair of column assemblies, the column assembly including a column body and a mounting seat fixed to the column body and extending inward, the column body extends downward from the trolley body, the mounting seat is provided with a positioning pin or a positioning hole for locking with the trolley, and each pair of the column assemblies are symmetrically arranged on both sides of the roller bed of the trolley switching station.

[0015] Optionally, the positioning pin is provided on the upper surface of the mounting seat, and the positioning pin is vertically upward; under normal circumstances, the positioning pin is lower than the matching positioning hole on the trolley located at the trolley switching station.

[0016] Optionally, a second driving component is also included to drive the extraction component to rise or fall relative to the trolley body.

[0017] Optionally, a guiding device is further included, and when the extraction component is located at the trolley switching station and is raised or lowered, the guiding device limits the lateral displacement of the extraction component.

[0018] Optionally, the guide device includes a guide wheel and a longitudinally extending guide groove cooperating with the guide wheel, one of the guide wheel and the guide groove is arranged on the column body, and the other is installed on the workbench or the ground of the trolley switching station through a support.

[0019] Optionally, the guide wheel includes a first guide wheel and a second guide wheel, the first guide wheel and the second guide wheel are arranged up and down and their axes are perpendicular to each other, the first guide wheel rolls in cooperation with two side walls of the guide groove, and the second guide wheel rolls in cooperation with the bottom wall of the guide groove.

[0020] Optionally, the second driving component includes a motor fixed to the trolley body and at least two groups of roller assemblies, the roller assembly includes a roller and a flexible pull rope wrapped around the roller, the free end of the flexible pull rope is connected to the extraction component, and when the motor rotates forward and reverse, the flexible pull rope is stored or released on the roller surface.

[0021] Optionally, the first driving component includes a driving member and a gear rack assembly, the gear rack assembly includes a gear and a rack meshing with each other, the rack is arranged along the track, and the gear is fixed to the trolley body.

[0022] Optionally, the roller bed welding production line includes a roller bed main line and a roller bed branch line connected to the roller bed main line, and the trolley switching station is arranged on the roller bed branch line.

[0023] Optionally, a controller is also included to control the actions of various actuators in the switching mechanism to complete the automatic switching of the trolley.

[0024] Optionally, the storage area of ​​the trolley is provided with a hub station, and the hub station is connected to the trolley switching station of the welding production line through the track, and the hub station is connected to the storage areas of trolleys of different models through corresponding roller beds. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a switching mechanism for a roller bed welding production line trolley in one embodiment of the present invention;

[0026] Figure 2 for Figure 1 Schematic diagram of the small and medium vehicle device and the partial parts of the guide device;

[0027] Figure 3 for Figure 2 A partial enlarged schematic diagram of point B in the middle;

[0028] Figure 4 It is a schematic diagram of the structure of the extraction component in one embodiment of the present invention.

[0029] in, Figures 1 to 4 The one-to-one correspondence between the names and numbers of the components is as follows:

[0030] The trolley device 1, the trolley body 11, the extraction component 12, the column body 121, the mounting seat 122, the positioning pin 123, the pull rope 13, the roller 14, the track 3, the guide device 4, the first guide wheel 421, the second guide wheel 422, the support 41, the guide groove 41a, the guide wheel 42, and the second driving component 5; the trolley 100. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Please refer to Figure 1 , Figure 2 and Figure 4 , Figure 1 A schematic diagram of the structure of a switching mechanism for a roller bed welding production line trolley in an embodiment of the present invention Figure 2 for Figure 1 Schematic diagram of the small and medium vehicle device and the partial parts of the guide device; Figure 4 It is a schematic diagram of the structure of the extraction component in one embodiment of the present invention.

[0033] The present invention provides a switching mechanism for a trolley of a roller bed welding production line. The roller bed welding production line includes a roller bed. The most widely used one is a high-speed roller bed. The high-speed roller bed drives the friction roller to carry the trolley at high speed through an electric motor to realize a conveying device for product assembly line production. It has the characteristics of high speed and high positioning accuracy and is the most common form of conveying. There are usually eight rollers, which drive the trolley in line contact with them to move and stop through rolling friction. A welding line conveyed by a high-speed roller bed is composed of a plurality of high-speed roller beds of a certain length.

[0034] The trolley can realize automatic connection of electricity and gas, and has a coding ruler, which can realize high-precision positioning with the high-speed roller bed. Welding fixtures and other mechanical mechanisms that can be carried can be fixed on it. In other words, for the welding line, the fixtures that make the welded parts meet the welding needs and realize the process positioning and clamping of the welded workpieces are installed on the trolley.

[0035] After the trolley moves to the designated position and stops accurately, the robot holds the welding clamp to weld the workpiece that has been positioned and clamped by the fixture. After welding is completed, the production line control system moves the friction roller on the high-speed roller bed again based on the confirmation signal obtained, transports the trolley to the next station and slows down to position it.

[0036] The switching mechanism for the roller bed welding production line trolley in the present invention comprises a trolley device 1, a track 3 and a first driving component.

[0037] The trolley device 1 includes a trolley body 11 and an extraction component 12 disposed on the trolley body 11. The extraction component 12 is used to lock or unlock the trolley on the trolley body 11, and the extraction component 12 lifts the trolley from the roller bed of the welding production line or places it on the roller bed in the vertical direction. When the trolley is placed on or removed from the roller bed, the placement direction and removal direction of the trolley are perpendicular to the arrangement plane of the roller bed. Usually, the roller bed is arranged horizontally, and the placement and removal direction of the trolley is the vertical direction.

[0038] It should be noted that the vertical described in this article is a macro overview and is not limited to 90° with the horizontal direction. A certain deviation is allowed, that is, around 90°.

[0039] The switching mechanism provided by the present invention further has a track 3 arranged between the trolley switching station of the roller bed of the welding production line and the storage area of ​​trolleys of different models, that is, the trolley device 1 can move between the trolley switching station and the storage area of ​​trolleys of different models along the track 3. Usually, each trolley has a corresponding number corresponding to a fixed storage area, which is convenient for management and automatic control of the later system.

[0040] In order to realize automatic control, the first driving component in the switching mechanism is used to drive the trolley body 11 to reciprocate along the track 3 between the trolley switching station of the roller bed and the storage area of ​​the trolley. The first driving component can be a motor, or a hydraulic or pneumatic driving component. Under normal circumstances, the first driving component drives the trolley body to be located at the trolley switching station, and the trolley device 1 does not hinder the transportation of the trolley on the roller bed. When the welding production line replaces the trolley, the trolley to be replaced is transported to the trolley switching station under the action of the roller bed's rollers, and the extraction component 12 of the trolley device 1 lifts the trolley vertically upward from the roller bed, and then the first driving component drives the trolley body 11 to move along the track 3 to drive the extraction component 12 and the trolley to move until it moves to the storage area of ​​the trolley, and then the connection between the extraction component 12 and the trolley is released, and the trolley is placed in its storage area.

[0041] Then, the first driving component continues to drive the trolley device 1 to move along the track 3 to the storage area of ​​the required trolley, and uses the extraction component 12 to lock the required trolley to the trolley body 11. The first driving component continues to drive the trolley device 1 that has locked the required trolley to move along the track 3 to the trolley switching station of the welding production line, and places the required trolley on the roller bed in the vertical direction. Finally, the required trolley is transported to the corresponding station of the welding production line by the friction conveying effect of the roller bed roller.

[0042] Compared with the prior art, the present invention is provided with a track 3 connecting the roller bed trolley switching station and the storage areas of trolleys of different models. The first driving component can drive the trolley device 1 to reciprocate along the track 3 between the trolley switching station and each trolley storage area of ​​the welding production line, and the trolley can be grabbed and released with the help of the extraction component 12, so that the automatic replacement of the trolley on the welding production line can be realized without manual operation, thereby reducing labor costs, and the extraction component 12 grabs the trolley in the vertical direction and places the trolley on the roller bed in the vertical direction, which greatly reduces the wear of the roller wheel of the roller bed caused by the trolley picking and placing, and improves the service life of the roller bed.

[0043] Through the above-mentioned configuration, the storage space of the trolley is not limited to one layer. By properly arranging the track 3, the trolley can be arranged in two or more layers.

[0044] The structure of the extraction component 12 for achieving the above technical effects has various forms, and a specific implementation of the extraction component 12 is given below.

[0045] In a specific embodiment, the extraction component 12 includes at least one pair of column assemblies, and the column assembly includes a column body 121 and a mounting seat 122 fixed to the column body 121 and extending inward, and the column body 121 extends downward from the trolley body 11. Preferably, the mounting seat 122 extends inward laterally, and the mounting seat 122 can be fixed to the column body 121 by bolts or welding. The mounting seat 122 is provided with a positioning pin or a positioning hole that cooperates with the trolley 100 to lock, that is, the mounting seat 122 and the trolley 100 are locked by the pin and the hole. When the positioning pin is inserted into the positioning hole, the trolley 100 is locked with the extraction component 12; when the positioning pin is disengaged from the positioning hole, the trolley and the extraction component 12 are unlocked. A positioning pin 123 is provided on the mounting seat 122, and a positioning hole is provided at the corresponding position of the trolley. The positioning pin 123 can be set horizontally or vertically.

[0046] In this article, it is preferred that the positioning pin 123 is arranged on the upper surface of the mounting seat 122 and is arranged vertically upward. Under normal circumstances, the positioning pin 123 is lower than the matching positioning hole on the trolley 100 located at the trolley switching station. When the trolley is transported to the trolley switching station, the extraction component 12 is lifted upward, and the positioning pin 123 can be inserted into the positioning hole of the trolley to extract the trolley. When the trolley 100 is lowered to the roller bed or storage area, the trolley 100 is placed on the supporting surface of the roller bed or storage area, and the extraction component 12 continues to move downward so that the positioning pin 123 can be disengaged from the positioning hole on the trolley 100 to achieve unlocking of the extraction component 12 and the trolley.

[0047] Furthermore, the switching mechanism in the present invention may also include a second driving component 5, which is used to drive the extraction component 12 to rise or fall relative to the trolley body 11. That is, under the action of the second driving component 5, the extraction component lifts or puts down the trolley 100. The provision of the second driving component 5 can facilitate the realization of automatic control of the mechanism.

[0048] In order to maintain the stability of the extraction or placement trolley and reduce damage to the roller bed rollers, this article further made the following settings.

[0049] Refer to Figure 3 , Figure 3 for Figure 2 A partial enlarged schematic diagram of point B in the middle.

[0050] In the above embodiments, the switching mechanism may further include a guide device 4. When the extraction component 12 is located at the lifting and lowering of the trolley switching station, the guide device 4 limits the lateral displacement of the extraction component 12. It should be noted that the lateral direction mentioned herein refers to the horizontal plane. In other words, the guide device 4 can ensure that the extraction component 12 is lifted and lowered in the vertical direction as much as possible, avoiding the extraction component 12 from shaking or swaying in the horizontal direction, thereby avoiding lateral friction between the trolley and the roller of the roller bed, which is beneficial to increasing the service life of the roller.

[0051] In a specific embodiment, the guide device 4 may include a guide wheel 42 and a longitudinally extending guide groove 41a cooperating with the guide wheel 42. One of the guide wheel 42 and the guide groove 41a is arranged on the column body 121, and the other is installed on the workbench or the ground of the trolley switching station through a support.

[0052] In the embodiment given herein, a guide wheel 42 is provided on the column body 121, and a guide groove is provided on the support 41. Of course, a guide groove may also be provided on the column body 121, and a guide wheel may be provided on the support 41.

[0053] In a specific embodiment, the guide wheel may include a first guide wheel 421 and a second guide wheel 422. The first guide wheel 421 and the second guide wheel 422 are arranged up and down and their axes are perpendicular to each other. The first guide wheel 421 rolls in cooperation with the two side walls of the guide groove 41, and the second guide wheel 422 rolls in cooperation with the bottom wall of the guide groove 41a.

[0054] In the above embodiments, the second driving component 5 may include a motor fixed to the trolley body 11 and at least two roller assemblies, the roller assembly includes a roller and a flexible pull rope 13 wound around the roller, the free end of the flexible pull rope 13 is connected to the extraction component 12, and when the motor rotates forward and reverse, the flexible pull rope 13 is stored or released on the roller surface. The flexible pull rope 13 may be a belt, a steel wire rope or other components with certain toughness and strength.

[0055] In the above embodiments, the first driving component may include a driving member and a gear rack assembly, the gear rack assembly may include a gear and a rack meshing with each other, the rack is arranged along the track 3, and the gear is fixed to the trolley body 11. Figure 2 As shown, the upper end of the trolley body is provided with four groups of rollers 14, and a slideway is provided on the track for rolling with the rollers 14. Under the cooperation of the driving member and the gear rack assembly, the rollers 14 can move along the slideway.

[0056] Of course, the structures of the first driving component and the second driving component 5 are not limited to those described in this article, as long as the above-mentioned technical effects can be achieved.

[0057] In order to minimize the structure of the switching mechanism, reduce layout costs and reduce the space occupied by the mechanism, the roller bed welding production line may include a roller bed main line and a roller bed branch line connected to the roller bed main line, and the trolley switching station is arranged on the roller bed branch line.

[0058] In addition, the switching mechanism can further be provided with a hub station in the storage area of ​​the trolley, the hub station is connected to the trolley switching station of the welding production line through a track, and the hub station is connected to the storage areas of trolleys of different models through corresponding roller beds; the trolley is transported to the corresponding position and stored through the roller bed structure, and the structure is simple and easy.

[0059] In the above embodiments, the switching mechanism may further include a controller for controlling the actions of various execution components in the switching mechanism. The controller can realize the actions of various execution components by cooperating with other detection components to cooperate in completing the automatic switching of the trolley.

[0060] Although this article does not specifically describe how the controller operates to achieve automatic switching of the trolley, from the contents described in this article, there is no obstacle for technical personnel in this field to understand and implement the technical solution of this article.

[0061] The above is a detailed introduction to a switching mechanism for a roller bed welding production line trolley provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A switching mechanism for a roller bed welding production line trolley, characterized in that: Includes the following components: A trolley device (1) comprises a trolley body (11) and an extraction component (12) arranged on the trolley body (11), wherein the extraction component (12) is used to lock or unlock the trolley to the trolley body (11), and the extraction component (12) lifts the trolley from the roller bed or places it on the roller bed in a vertical direction; Tracks are arranged between the trolley switching station of the roller bed and the storage area for trolleys of different models; A first driving component is used to drive the trolley body (11) to reciprocate along the track between the trolley switching station of the roller bed and the storage area of ​​the trolley; The extraction component (12) comprises at least one pair of column assemblies, wherein the column assembly comprises a column body (121) and a mounting seat (122) fixed to the column body (121) and extending inwardly, the column body (121) extends downward from the trolley body (11), and the mounting seat (122) is provided with a positioning pin (123) or a positioning hole for locking with the trolley, and each pair of the column assemblies is symmetrically arranged on both sides of the roller bed of the trolley switching station; It also includes a guide device (4), when the extraction component (12) is located at the trolley switching station and is lifted and lowered, the guide device (4) limits the lateral displacement of the extraction component (12); the guide device (4) includes a guide wheel and a longitudinally extending guide groove cooperating with the guide wheel, one of the guide wheel and the guide groove is arranged on the column body (121), and the other is installed on the workbench or the ground of the trolley switching station through a support (41); when the trolley is transported to the trolley switching station, the extraction component (12) is lifted upward, and the positioning pin (123) can be inserted into the positioning hole of the trolley to extract the trolley; when the trolley is lowered to the roller bed or storage area, the trolley is placed on the support surface of the roller bed or the storage area, the extraction component (12) continues to move downward, and the positioning pin (123) is disengaged from the positioning hole on the trolley to achieve the unlocking of the extraction component (12) and the trolley.

2. The switching mechanism for a roller bed welding production line trolley according to claim 1, characterized in that: The upper surface of the mounting seat (122) is provided with the positioning pin (123), and the positioning pin (123) is vertically upward; under normal conditions, the positioning pin (123) is lower than a matching positioning hole on the trolley located at the trolley switching station.

3. The switching mechanism for a roller bed welding production line trolley according to claim 1, characterized in that: It also includes a second driving component (5) for driving the extraction component (12) to rise or fall relative to the trolley body (11).

4. The switching mechanism for a roller bed welding production line trolley according to claim 1, characterized in that: The guide wheel comprises a first guide wheel (421) and a second guide wheel (422); the first guide wheel (421) and the second guide wheel (422) are arranged up and down and their axes are perpendicular to each other; the first guide wheel (421) rolls in cooperation with the two side walls of the guide groove, and the second guide wheel (422) rolls in cooperation with the bottom wall of the guide groove.

5. The switching mechanism for a roller bed welding production line trolley according to claim 3, characterized in that: The second driving component (5) includes a motor fixed to the trolley body (11) and at least two groups of roller assemblies, the roller assembly includes a roller and a flexible pull rope (13) wound around the roller, the free end of the flexible pull rope (13) is connected to the extraction component (12), and when the motor rotates forward and reverse, the flexible pull rope (13) is received or released on the surface of the roller.

6. The switching mechanism for a roller bed welding production line trolley according to any one of claims 1 to 5, characterized in that: The first driving component comprises a driving member and a gear rack assembly, the gear rack assembly comprises a gear and a rack meshing with each other, the rack is arranged along the track, and the gear is fixed to the trolley body (11).

7. The switching mechanism for a roller bed welding production line trolley according to any one of claims 1 to 5, characterized in that: The roller bed welding production line comprises a roller bed main line and a roller bed branch line connected to the roller bed main line, and the trolley switching station is arranged on the roller bed branch line.

8. The switching mechanism for a roller bed welding production line trolley according to any one of claims 1 to 5, characterized in that: It also includes a controller for controlling the actions of various execution components in the switching mechanism to complete the automatic switching of the trolley.

9. The switching mechanism for a roller bed welding production line trolley according to any one of claims 1 to 5, characterized in that: The storage area of ​​the trolley is provided with a hub station, which is connected to the trolley switching station of the welding production line through the track, and the hub station is connected to the storage areas of trolleys of different models through corresponding roller beds.

Images