CN206502338U - Precision positioning mechanism for driving pallet - Google Patents

Abstract

The utility model relates to an accurate positioning mechanism for driving trays in the field of mechanical transmission equipment, comprising a transmission base, a cam drive assembly, a lifting assembly and a traction assembly. The top of the transmission base is provided with a horizontal slide rail, and a A tray that can slide horizontally along the horizontal slide rail. The left side of the tray is provided with a first horizontal chute, the right side of the tray is provided with a second horizontal chute, and the inner bottom of the second horizontal chute is provided with a clamping positioning column. A grasping positioning column is arranged above the clamping positioning column, the lifting assembly includes a lifting main board, a horizontal guide rail and several positioning plates, and the traction assembly includes an electric push rod, a traction main board and a traction pin plate. The traction component is used to drive the pallet to move horizontally, and the lifting component is used to press the pallet, so as to accurately position the pallet. Both the traction component and the lifting component are driven by the cam drive component, without using any electronic control components, and without any complicated connections. circuit, low manufacturing cost.

Description

Accurate positioning mechanism for driving the tray

technical field

The utility model relates to the field of mechanical transmission equipment, in particular to an accurate positioning mechanism for driving a tray.

Background technique

In automated processing or assembly equipment, in order to meet the needs of mass production, most of the automated equipment can realize assembly line operations. In the intelligent assembly platform, it is necessary to set the moving position of each station, and the corresponding settings for each station There are pallets, which are used to support workpieces, and each pallet can correspond to a station. During the assembly line operation, the pallet is driven by the transmission mechanism, and the transmission mechanism moves the pallet from the first station to the last station, thus completing the automatic assembly.

The conveying mechanism is used for conveying pallets, and can also be used for pressing pallets. There are two kinds of conveying mechanisms in the prior art, one is a conveying mechanism driven by air pressure, which has simple structure, flexible and convenient installation, and low purchase cost. The driving force is small, and the precision of pneumatic driving is not high, and the movement speed is slow; the other is the transmission mechanism driven by the motor. This structure has greater strength, easy installation, high flexibility, and faster movement speed. However, when the movement speed is faster, the error is larger, which affects the movement error, especially when the movement is stiff and the impact vibration is large when stopping. In addition, the volume of this structure is large, resulting in a large overall volume.

Utility model content

The purpose of the utility model is to solve the above defects and provide a precise positioning mechanism for driving the tray, which can move the tray horizontally and accurately position the tray.

The purpose of this utility model is achieved in the following ways:

The precise positioning mechanism used to drive the tray includes a transmission base, a cam drive assembly, a lifting assembly and a traction assembly. The top of the transmission base is provided with a horizontal slide rail, and a horizontal slide rail is provided on the horizontal slide rail to slide horizontally along the horizontal slide rail. The tray, the left side of the tray is provided with a first horizontal chute, the right side of the tray is provided with a second horizontal chute, the first horizontal chute and the second horizontal chute are both used to match and snap into the horizontal slide rail The inner bottom surface of the horizontal chute is provided with a clamping positioning column, and above the clamping positioning column is provided with a grasping positioning column, and the grasping positioning column is located on the top surface of the second horizontal chute.

Both the lifting component and the traction component are set on the right side of the transmission base, and the traction component is installed on the top of the lifting component. The lifting component includes a lifting main board, a horizontal guide rail and several positioning plates. The horizontal guide rail is installed on the top of the lifting main board horizontally. The positioning plates are neatly arranged and fixed on the top of the lifting main board. The front end of the positioning plate is provided with positioning claws extending downward. The positioning claws extend into the second horizontal chute and are located above the clamping positioning columns. The positioning claws are used for pairing and pressing. The clamping positioning column of the tight tray, the left side of the lifting main board and the right side of the transmission base are connected by a vertical guide rail, the right side of the lifting main board is provided with a follower pallet, and the follower pallet and the cam The transmission components are in contact, and the cam transmission component is driven by the external drive mechanism to move up and down. The clamping positioning column is horizontally arranged in the second horizontal chute. The clamping positioning column is a cylinder, and the top of the clamping positioning column is for easy positioning. The claws are paired to slide into the raised arc surface for clamping and positioning. The positioning claw is composed of two sliding columns with the same structure. The bottom end of the sliding columns is provided with a clamping slope for auxiliary sliding. It is convenient for the clamping positioning post to slide between the two sliding posts after the faces are in contact.

The traction assembly includes the electric push rod, the traction main board and the traction pin plate. The traction main board is installed on the telescopic rod of the electric push rod, and the traction main board is connected with the slider of the horizontal guide rail, so that the traction main board moves horizontally along the horizontal guide rail, and the traction The pin plate is horizontally installed on the top of the traction main board, and the top surface of the traction pin plate is provided with a number of neatly arranged pins, and the front end of the traction pin plate extends into the second horizontal chute, so that the pins are located under the grasping positioning column , the pins are used for pairing and snapping into the grabbing positioning column of the pallet, the grabbing positioning column is vertically arranged on the top of the second horizontal chute, and the bottom of the grabbing positioning column is for the convenience of pin pairing and sliding into the clamping inner Groove, the edge of the inner groove is a concave arc surface, the top of the pin is provided with a grabbing slope for assisting sliding in, and the grabbing slope and the inner concave arc surface are paired and contacted to facilitate the pin sliding into the inner groove; When the cam drive assembly tilts up, it will drive the lifting main board to rise along the vertical guide rail, so that the pins are paired and snapped into the grabbing and positioning columns of the pallet, and then the telescopic rod of the electric push rod is extended to drive the pallet to move forward, and the pallet moves After being in place, the cam transmission assembly resets, and the lifting main board descends, so that the positioning claws are paired with the clamping positioning columns that press the tray, and the traction main board resets at this time, thereby completing the transmission and precise positioning of the tray.

In the above description, as a preferred solution, there are two clamping and positioning columns, which are respectively located at the front and rear ends of the inner bottom surface of the second horizontal chute.

In the above description, as a preferred solution, there are two groups of grabbing and positioning columns, which are respectively located at the front and rear ends of the top surface of the second horizontal chute.

In the above description, as a preferred solution, the cam transmission assembly includes a gear seat, a gear shaft, a cam and a rocker, the gear shaft meshes with an external drive mechanism, and the external drive mechanism drives the gear shaft to rotate, and the cam and the gear shaft To connect, the cam and the gear shaft are installed on the rear end of the gear seat, the middle part of the rocker is rotatably installed on the front end of the gear seat, the rear end of the rocker is in contact with the cam, driven by the cam, and the front end of the rocker is provided with a roller , the bottom of the follower support plate is provided with a rolling surface that extends backward and is used to contact the roller. The roller can roll along the rolling surface. When the gear shaft rotates, it drives the cam to rotate, and the rear end of the rocker is driven by the cam to swing. , and at the same time the front end of the rocker tilts up and down, thereby driving the follower pallet to move up and down.

In the above description, as a preferred solution, more than two vertical grooves are provided on the front side or the rear side of the tray, and buffer tubes are paired and installed in the vertical grooves, and one side of the buffer tube protrudes outward At the opening of the vertical groove, the buffer tube is used to prevent hard collision between two adjacent pallets.

The beneficial effects produced by the utility model are as follows:

1) The traction component is used to drive the pallet to move horizontally. The traction component includes an electric push rod, a traction main board and a traction pin plate. There are several neatly arranged pins on the top surface of the traction pin plate, and the pins are used to match and snap into the pallet. In the grasping and positioning column of the pallet, when the cam drive assembly tilts upward, it will drive the lifting main board to rise along the vertical guide rail, so that the pins are paired and snapped into the grasping and positioning column of the tray, and then the telescopic rod of the electric push rod is extended. Drive the pallet to move forward and horizontally, and in the process of driving the pallet to move through the traction component, it is also to improve the accuracy of the pallet movement and ensure the success rate of the automatic assembly line for workpiece assembly;

2) The lifting component is used to press the pallet to precisely position the pallet. The lifting component includes a lifting main board, a horizontal guide rail and several positioning plates. The front end of the positioning plate is provided with a positioning claw extending downward. Tighten the clamping positioning column of the tray. When working, when the tray is driven into place by the traction assembly, the cam transmission assembly resets, and the lifting main board descends, so that the positioning claws are paired with the clamping positioning post of the pressing tray. At this time, the traction main board is reset, thereby completing alignment. The transmission and precise positioning of the pallet ensures that in the process of automatic processing or assembly, the pallet is pressed and then the workpiece is assembled to ensure the accuracy of the positioning of the workpiece, thereby ensuring the accuracy of the workpiece assembly;

3) Both the traction component and the lifting component are driven by the cam drive component, and the cam drive component is driven by the driving mechanism of the intelligent assembly platform to move up and down. When the cam drive component tilts upward, it drives the follower pallet, thereby driving the traction component to move , on the contrary, when the cam transmission assembly resets downward, it drives the lifting assembly to press down on the tray. The whole process is driven by the cam transmission assembly to achieve synchronous action. The structure is simple, the driving method is simple, and no electronic control components are used. No need to connect any complicated lines, low manufacturing cost;

4) The cam transmission structure has high precision, high degree of intelligence, compact structure, and the cam transmission structure will not produce too much inertia, and the accuracy can be guaranteed even under high-speed operation. It is especially suitable for intelligent equipment with high precision requirements. Processing or assembly of assembly platforms;

5) The positioning claw is composed of two sliding posts with the same structure. The bottom end of the sliding post is provided with a clamping inclined surface for auxiliary sliding in. After the clamping inclined surface is paired with the raised arc surface, it is convenient for the clamping positioning post to slide into the two Between the two sliding posts, it is convenient for express delivery to clamp, and at the same time, the position of the pallet can be quickly corrected, so as to complete accurate positioning. The edge of the pin is a concave arc surface, and the top of the pin is provided with a grabbing slope for assisting sliding in. After the grabbing slope and the concave arc surface are paired and contacted, the pin can slide into the inner groove, so that the pin can be express and Precisely insert and slide into the inner groove, so as to facilitate the movement of the tray.

Description of drawings

Fig. 1 is the partial structure exploded schematic diagram of the utility model embodiment;

Fig. 2 is the three-dimensional structure schematic diagram of the utility model embodiment;

Fig. 3 is the partially enlarged schematic diagram of Fig. 2;

Fig. 4 is a schematic exploded view of the structure of the cam transmission assembly in the embodiment of the present invention;

Fig. 5 is a three-dimensional structural schematic diagram of the traction assembly in the embodiment of the present invention;

Fig. 6 is a schematic diagram of the three-dimensional structure of the lifting assembly in the embodiment of the present invention;

Fig. 7 is a schematic diagram of the three-dimensional structure of the tray in the embodiment of the present invention;

In the figure, 1 is the transmission base, 2 is the traction assembly, 3 is the lifting assembly, 4 is the cam transmission assembly, 5 is the tray, 201 is the electric push rod, 202 is the traction main board, 203 is the traction pin plate, 204 is the pin, 301 is the lifting main board, 302 is the horizontal guide rail, 303 is the follower support plate, 304 is the positioning plate, 305 is the positioning claw, 401 is the gear seat, 402 is the gear shaft, 403 is the cam, 404 is the rocker, 501 is the first A horizontal chute, 502 is the second horizontal chute, 503 is the clamping positioning column, 504 is the grasping positioning column, 505 is the buffer tube.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

In this embodiment, referring to Fig. 1 to Fig. 7, the precise positioning mechanism for driving the tray includes a transfer base 1, a cam drive assembly 4, a lift assembly 3 and a traction assembly 2, and the top of the transfer base 1 is provided with a horizontal slide Rail, and be provided with on the horizontal slide rail and can carry out the pallet 5 that can slide horizontally along the horizontal slide rail.

As shown in Figure 7, the left side of tray 5 is provided with first horizontal chute 501, and the right side of tray 5 is provided with second horizontal chute 502, and first horizontal chute 501 and second horizontal chute 502 are used for The pairing is snapped into the horizontal slide rail, and the inner bottom surface of the second horizontal chute 502 is provided with a clamping positioning column 503, and above the clamping positioning column 503, a grasping positioning column 504 is arranged, and the grasping positioning column 504 is located on the second horizontal slide. The top surface of the groove 502. The clamping positioning column 503 is arranged laterally in the second horizontal chute 502, and there are two clamping positioning columns 503, which are respectively located at the front and rear ends of the inner bottom surface of the second horizontal chute 502, and the clamping positioning column 503 is a cylinder The top of the clamping positioning column 503 is a convex arc surface for the positioning claws 305 to slide in pairs to perform clamping and positioning. The positioning claws 305 are composed of two sliding columns with the same structure, and the bottom end of the sliding columns is provided for auxiliary sliding The clamping slope is inserted, and the clamping slope and the raised arc surface are paired and contacted to facilitate the clamping positioning post 503 to slide between the two sliding posts. The grabbing positioning column 504 is vertically arranged on the top of the second horizontal chute 502, and the grabbing positioning column 504 is provided with two groups, which are respectively located at the front and rear ends of the second horizontal chute 502 top surface. The bottom is to facilitate the pairing of the pins 204 to slide into the clamping inner groove. The edge of the inner groove is a concave arc surface. The top of the pin 204 is provided with a grabbing slope for assisting sliding in. It is convenient for the pin 204 to slide into the inner groove after the faces are in contact. The front side or the rear side of the tray 5 are provided with more than two vertical grooves, and a buffer tube 505 is matched and installed in the vertical groove, and one side of the buffer tube 505 protrudes outward from the opening of the vertical groove. The buffer tube 505 is used to prevent hard collision between two adjacent trays 5 .

The lifting assembly 3 and the traction assembly 2 are all arranged on the right side of the transmission base 1, and the traction assembly 2 is installed on the top of the lifting assembly 3. As shown in Figure 6, the lifting assembly 3 includes a lifting main board 301, a horizontal guide rail 302 and several positioning blocks. Plate 304 and horizontal guide rail 302 are horizontally installed on the top of lifting main board 301. Several positioning plates 304 are neatly arranged and fixed on the top of lifting main board 301. The front end of positioning plate 304 is provided with downward extending positioning claw 305, and positioning claw 305 extends into In the second horizontal chute 502, and located above the clamping positioning column 503, the positioning claw 305 is used to match the clamping positioning column 503 of the pressing tray 5, and lift the left side of the main board 301 and the right side of the transmission base 1 They are connected by vertical guide rails, and the right side of the lifting main board 301 is provided with a follower supporting plate 303, and the follower supporting plate 303 is in contact with the cam transmission assembly 4, and the cam transmission assembly 4 is driven by an external drive mechanism to move up and down. Warp. The lifting assembly 3 is used to press the tray 5 so as to accurately position the tray 5. The lifting assembly 3 includes a lifting main board 301, a horizontal guide rail 302 and several positioning plates 304. The front end of the positioning plate 304 is provided with a positioning claw 305 extending downward. , the positioning claw 305 is used to match the clamping positioning column 503 of the pressing tray 5. During work, when the tray 5 is driven into place by the traction assembly 2, the cam transmission assembly 4 is reset, and the lifting main board 301 is lowered, so that the positioning claw 305 is paired and pressing the tray 5, the clamping positioning column 503, at this time, the traction main board 202 is reset, thereby completing the transmission and precise positioning of the pallet 5, ensuring that the workpiece is assembled after the pallet 5 is compressed during the automatic processing or assembly process, so as to ensure that the workpiece The accuracy of positioning ensures the accuracy of workpiece assembly.

As shown in Figure 5, the traction assembly 2 includes an electric push rod 201, a traction main board 202 and a traction pin plate 203. connected, so that the traction main board 202 moves horizontally along the horizontal guide rail 302, and the traction pin plate 203 is horizontally installed on the top of the traction main board 202, and the top surface of the traction pin plate 203 is provided with several neatly arranged pin columns 204, and the traction pin plate 203 The front end of the front end extends into the second horizontal chute 502 , so that the pin 204 is located below the grasping and positioning column 504 , and the pin 204 is used to match and snap into the grasping and positioning column 504 of the tray 5 . The traction assembly 2 is used to drive the tray 5 to move horizontally. The traction assembly 2 includes an electric push rod 201, a traction main board 202 and a traction pin plate 203. The top surface of the traction pin plate 203 is provided with several neatly arranged pins 204. The pins 204 is used for pairing and snapping into the grasping and positioning column 504 of the tray 5. When the cam drive assembly 4 tilts upward, it drives the lifting main board 301 to rise along the vertical guide rail, so that the pins 204 are paired and snapped into the grabbing of the tray 5. Inside the positioning column 504, the extension of the telescopic rod of the electric push rod 201 drives the pallet 5 to move forward and horizontally. During the process of driving the pallet 5 to move through the traction assembly 2, it is also in order to improve the moving accuracy of the pallet 5 and ensure the assembly of the workpiece by the automatic assembly line. success rate.

When the cam transmission assembly 4 tilts up, it drives the lifting main board 301 to rise along the vertical guide rail, so that the pins 204 are paired and snapped into the grasping and positioning columns 504 of the tray 5, and then the telescopic rod of the electric push rod 201 is extended to drive the tray. 5 moves forward, the cam drive assembly 4 resets after the tray 5 moves in place, and the lifting main board 301 descends, so that the positioning claw 305 is paired with the clamping positioning column 503 of the pressing tray 5, and the traction main board 202 is reset at this time, thereby completing the positioning of the tray 5 Transmission and precise positioning. Both the traction assembly 2 and the lifting assembly 3 are driven by the cam transmission assembly 4, and the cam transmission assembly 4 is driven by the external drive mechanism to move up and down. Component 2 moves, on the contrary, when the cam transmission component 4 resets downward, it drives the lifting component 3 to press the tray 5 downward, and the whole process is driven by the cam transmission component 4 to realize synchronous action. Any electronic control components need to be used, no complex wiring needs to be connected, and the manufacturing cost is low.

As shown in Figure 4, the cam transmission assembly 4 includes a gear seat 401, a gear shaft 402, a cam 403 and a rocker 404. The gear shaft 402 meshes with an external driving mechanism, and the external driving mechanism drives the gear shaft 402 to rotate, and the cam 403 Connect with the gear shaft 402, the cam 403 and the gear shaft 402 are installed on the rear end of the gear seat 401, the middle part of the rocking bar 404 is rotatably installed on the front end of the gear seat 401, and the rear end of the rocking bar 404 is in contact with the cam 403, Driven by the cam 403, the front end of the rocker 404 is provided with a roller, and the bottom of the follower support plate 303 is provided with a rolling surface extending backward and used to contact the roller. The roller can roll along the rolling surface. When the gear shaft 402 rotates When the cam 403 is driven to rotate, the rear end of the rocking bar 404 is driven by the cam 403 to swing, and at the same time, the front end of the rocking bar 404 is tilted up and down, thereby driving the follower supporting plate 303 to move up and down. The cam transmission structure has high precision and compact structure. The cam transmission structure will not produce too much inertia, and the accuracy can be guaranteed even under high-speed operation. It is especially suitable for automatic processing or assembly that requires high precision.

The above content is a further detailed description of the utility model in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the utility model belongs, on the premise of not departing from the concept of the utility model, some simple deduction or replacement can also be made, which should be regarded as the protection scope of the utility model.

Claims (5)

1. The precise positioning mechanism used to drive the tray, including the transmission base, the cam drive assembly, the lifting assembly and the traction assembly, is characterized in that: the top of the transmission base is provided with a horizontal slide rail, and the horizontal slide rail is equipped with a horizontal slide rail. The pallet slides horizontally on the slide rail. The left side of the pallet is provided with a first horizontal chute, and the right side of the pallet is provided with a second horizontal chute. Both the first horizontal chute and the second horizontal chute are used to match and snap into the horizontal slide In the rail, a clamping positioning column is provided on the inner bottom surface of the second horizontal chute, and a grabbing positioning column is provided above the clamping positioning column, and the grabbing positioning column is located on the top surface of the second horizontal chute; the lifting component and the traction The components are all set on the right side of the transmission base, and the traction component is installed on the top of the lifting component. The lifting component includes a lifting main board, a horizontal guide rail and several positioning plates. The horizontal guide rail is installed horizontally on the top of the lifting main board, and several positioning plates are neatly arranged Fixed on the top of the lifting main board, the front end of the positioning plate is provided with a positioning claw extending downwards, the positioning claw extends into the second horizontal chute, and is located above the clamping positioning column, and the positioning claw is used to pair with the clamping plate Tighten the positioning column, the left side of the lifting main board and the right side of the transmission base are connected by a vertical guide rail, and the right side of the lifting main board is provided with a follower supporting plate, which is in contact with the cam transmission assembly , the cam transmission assembly is driven by an external drive mechanism to move up and down, and the clamping positioning column is horizontally arranged in the second horizontal chute. The clamping positioning column is a cylinder. The raised arc surface for clamping and positioning, the positioning claw is composed of two sliding columns with the same structure, and the bottom end of the sliding column is provided with a clamping inclined surface for assisting sliding in. After the clamping inclined surface is paired with the raised arc surface It is convenient to slide the clamping positioning column between the two sliding columns; the traction assembly includes the electric push rod, the traction main board and the traction pin plate, the traction main board is installed on the telescopic rod of the electric push rod, and the traction main board and the slider of the horizontal guide rail Make the connection so that the traction main board moves horizontally along the horizontal guide rail. The traction pin plate is installed horizontally on the top of the traction main board. The top surface of the traction pin plate is provided with several neatly arranged pins. The front end of the traction pin plate extends into the second In the horizontal chute, the pins are located below the grabbing and positioning columns, and the pins are used to match and snap into the grabbing and positioning columns of the tray. The grabbing and positioning columns are vertically arranged on the top of the second horizontal chute, and the grabbing The bottom of the positioning column is to facilitate the pairing of the pins to slide into the clamping inner groove. The edge of the inner groove is a concave arc surface, and the top of the pin is provided with a grabbing slope for assisting in sliding. After the arc surfaces are paired and contacted, the pins can slide into the inner groove; when the cam drive assembly tilts up, it drives the lifting main board to rise along the vertical guide rail, so that the pins are paired and snapped into the grabbing and positioning columns of the tray, and then the electric power The extension of the telescopic rod of the push rod drives the pallet to move forward. After the pallet moves in place, the cam drive assembly resets, and the lifting main board descends, so that the positioning claws are paired with the clamping positioning column of the pallet. At this time, the traction main board is reset, thereby completing the pallet. Transmission and precise positioning. 2 . The precise positioning mechanism for driving the tray according to claim 1 , wherein there are two clamping positioning columns, which are respectively located at the front and rear ends of the inner bottom of the second horizontal chute. 3 . 3 . The precise positioning mechanism for driving the tray according to claim 1 , wherein there are two sets of grabbing and positioning columns, which are respectively located at the front and rear ends of the top surface of the second horizontal chute. 4 . 4. The precise positioning mechanism for driving the tray according to claim 1, characterized in that: the cam drive assembly includes a gear seat, a gear shaft, a cam and a rocker, the gear shaft is engaged with an external drive mechanism, and the external drive mechanism The driving mechanism drives the gear shaft to rotate, and the cam is connected with the gear shaft. Both the cam and the gear shaft are installed at the rear end of the gear seat. The middle part of the rocker is rotatably installed at the front end of the gear seat, and the rear end of the rocker contacts the cam. , driven by a cam, the front end of the rocker is provided with a roller, the bottom of the follower support plate is provided with a rolling surface extending backward and used to contact the roller, the roller can roll along the rolling surface, and when the gear shaft rotates, it drives the cam When it rotates, the rear end of the rocker is driven by the cam to swing, and at the same time, the front end of the rocker is tilted up and down, thereby driving the follower supporting plate to move up and down. 5. The precise positioning mechanism for driving the tray according to any one of claims 1-4, characterized in that: the front side or the back side of the tray is provided with more than two vertical grooves, and A buffer tube is matched and installed in the groove, and one side of the buffer tube protrudes outward from the opening of the vertical groove, and the buffer tube is used to prevent hard collision between two adjacent pallets.