Pressure maintaining device

Abstract

The invention relates to a pressure maintaining device which comprises a rack, a pressing plate support capable of moving up and down is arranged on the rack, and a pressing plate assembly is arranged on the pressing plate support. The pressing plate assembly comprises a top plate connected to the pressing plate support, a pressing plate elastically connected to the bottom face of the top plate, and a pressing block which is arranged on the top plate, penetrates through the pressing plate and can move up and down relative to the pressing plate. A positioning sleeve which protrudes out of the bottom surface of the pressing plate and is of a cylindrical structure is arranged on the pressing plate; the rack is further provided with a base which can horizontally move to the position under the pressing plate, the top face of the base is provided with a positioning mechanism, the base is provided with an elastic positioning column which can be matched with the positioning sleeve in a limiting and clamping mode, and the base is further provided with at least three fixing columns which are equal in height and can form vertexes of a polygon. By means of the pressure maintaining device, deviation of small auxiliary materials or parts subjected to pressure maintaining can be avoided, vertical flattening and pressure maintaining are achieved, and control is more accurate.

Description

Technical Field

[0001] The invention relates to the field of mobile phone assembly equipment, in particular to a pressure maintaining device. Background Art

[0002] During the automated assembly of mobile phones, after glue is applied to the glue spots inside the frame of the mobile phone, precise assembly is completed through the mounting module, and then it is pressed with greater pressure to further press and expand the glue, so that the mounted auxiliary materials or parts can be better adhered and fixed in the precise position. In the existing pressing process, some small parts are prone to offset at the moment of contact with the pressing plate because the force direction is not in the vertical direction, resulting in assembly dislocation and affecting the quality of the product. Summary of the invention

[0003] In view of the existing deficiencies, the present invention provides a pressure maintaining device.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a pressure maintaining device, including a frame, a pressure plate bracket which can move up and down in the vertical direction is arranged on the frame, and a pressure plate assembly is arranged on the pressure plate bracket; the pressure plate assembly includes a top plate connected to the pressure plate bracket, a pressure plate elastically connected to the bottom surface of the top plate, and a pressure block which is arranged on the top plate and passes through the pressure plate and can move up and down relative to the pressure plate in the vertical direction; a positioning sleeve is arranged on the pressure plate, which protrudes from the bottom surface of the pressure plate and has a positioning hole on the end face of the bottom end; the frame is also provided with a base which can move horizontally to the top surface directly below the pressure plate and is provided with a positioning mechanism, the base is provided with an elastic positioning column which can match and limit the positioning sleeve, and the base is also provided with at least three fixing columns of equal height that can form the vertices of a polygon.

[0005] Preferably, two pressure plate brackets are arranged on the frame in parallel and at intervals, and each of the pressure plate brackets is provided with a pressure plate assembly; two bases corresponding to the two pressure plates are arranged on the frame, and each of the bases is provided with an elastic positioning column and at least three fixed columns of equal height.

[0006] Preferably, the pressure plate is provided with a first through hole, the top plate is provided with a sliding column sliding in the first through hole, and a compression spring sleeved on the sliding column is provided between the top plate and the pressure plate.

[0007] Preferably, a second through hole is provided on the pressing plate, a first cylinder is provided on the top plate, and the pressing block is extended out or retracted into the second through hole by the driving of the first cylinder.

[0008] Preferably, the pressing plate is provided with an auxiliary pressing foot which passes through the pressing plate and can elastically move relative to the pressing plate.

[0009] Preferably, a support frame is provided on the frame, a first guide rail along the vertical direction is provided on the support frame, a second cylinder is also provided on the support frame, and the pressure plate bracket is slidably arranged on the first guide rail by the driving of the second cylinder.

[0010] Preferably, the positioning hole is a trumpet-shaped structure with a diameter gradually increasing from the inside to the outside.

[0011] Preferably, two elastic positioning columns are provided, and the two elastic positioning columns are arranged in the middle position on the opposite sides of the top surface of the base, at least one fixing column is provided on both sides of each elastic positioning column, and two positioning sleeves are provided on the pressure plate.

[0012] Preferably, the positioning mechanism comprises a base arranged on the top surface of the base, a positioning pin and / or a suction cup arranged on the base.

[0013] Preferably, a pressure sensor for monitoring the pressure of the pressing block is also arranged on the base.

[0014] The beneficial effects of the present invention are as follows: the pressure plate of the invention is elastically connected to the top plate to form a floating structure, the pressure plate is pre-positioned by the engagement of the positioning sleeve and the elastic positioning column, and then the fixed column performs the final positioning of the pressure plate, and the equal height of the fixed column enables the pressure plate to be kept in a horizontal position, and finally the pressure block is pressed vertically downward on the product to be processed, and the vertical downward pressure is maintained, which can avoid the displacement of small auxiliary materials or parts during pressing, realize vertical flattening and pressure maintenance, make the control more precise, avoid assembly misalignment, and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0016] Figure 2 Embodiment of the present invention Figure 1 A is a schematic diagram of the enlarged structure of the middle part;

[0017] Figure 3 It is a schematic diagram of the installation structure of the pressing plate assembly and the pressing plate bracket according to an embodiment of the present invention;

[0018] Figure 4 is a schematic structural diagram of a pressure plate assembly according to an embodiment of the present invention;

[0019] Figure 5 is a structural schematic diagram of the bottom surface of a pressing plate assembly according to an embodiment of the present invention;

[0020] Names and serial numbers of parts in the figure: 1-frame 10 support frame 100-first guide rail 101-second cylinder 2-pressure plate bracket 3-pressure plate assembly 30-top plate 31-pressure plate 32-pressure block 300-sliding column 301-compression spring 302-first cylinder 310-first through hole 311-second through hole 4-positioning sleeve 40-positioning hole 5-base 50-base 51-positioning pin 52-suction cup 53-pressure sensor 6-elastic positioning column 7-fixed column 8-auxiliary presser foot. DETAILED DESCRIPTION

[0021] In order to more clearly illustrate the purpose, technical solutions and advantages of the embodiments of the present invention, the present invention will be further described in conjunction with the accompanying drawings and embodiments below for a clear and complete description. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. In addition, the directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", etc., are only referenced to the directions of the attached diagrams. The directional terms used are for better and clearer explanation and understanding of the present invention, rather than indicating or implying the orientation that the present invention must have, and therefore cannot be understood as limitations on the present invention.

[0022] Embodiments of the present invention Figures 1 to 5As shown in, a pressure-maintaining device includes a frame 1, which is installed at a corresponding position of the production line. A pressure plate bracket 2 that can move up and down in the vertical direction is arranged on the frame 1. The pressure plate bracket 2 is movably arranged on the frame 1, and it moves vertically up and down. At this time, a support frame 10 is arranged on the frame 1, and a first guide rail 100 along the vertical direction is arranged on the support frame 10. A second cylinder 101 is also arranged on the support frame 10. The pressure plate bracket 2 is slidably arranged on the first guide rail 100 by the drive of the second cylinder 101. The support frame 10 is installed on the frame 1 by welding or screws, and a first guide rail 100 is arranged on the support frame 10. The sliding direction on the first guide rail 100 is vertically downward. , the second cylinder 101 is installed on the support frame 10 according to different situations, such as setting a horizontal mounting plate on the top of the support frame 10, and then installing the second cylinder 101 on the mounting plate, the pressure plate bracket 2 is connected to the piston rod of the second cylinder 101, and slides on the first guide rail 100 through the drive of the second cylinder 101. At this time, matching protrusions and slide grooves that can slide relatively are set between the pressure plate bracket 2 and the first guide rail 100. If a protrusion is set on the pressure plate bracket 2, a slide groove is set on the first guide rail 100; a pressure plate assembly 3 is set on the pressure plate bracket 2, and the pressure plate assembly 3 is used to position and pressurize the product to be processed; the pressure plate assembly 3 includes a pressure plate connected to the pressure plate The top plate 30 on the bracket 2, the pressure plate 31 elastically connected to the bottom surface of the top plate 30, and the pressure block 32 arranged on the top plate 30 and passing through the pressure plate 31 and able to move up and down relative to the pressure plate 31 in the vertical direction. The top plate 30 and the pressure plate 31 are arranged in parallel, and the top plate 30 is connected to the pressure plate bracket 2 at the top surface and moves up and down with the pressure plate bracket 2. The pressure plate 31 also moves together with the top plate 30, and the elastic connection between the pressure plate 31 and the top plate 30 makes the elastic connection structure buffer the upward force on the pressure plate 31; the elastic connection structure between them is that the pressure plate 31 is provided with a first through hole 310, and the top plate 30 is provided with a first through hole 310. A sliding column 300 slides in a through hole 310, and a compression spring 301 is provided between the top plate 30 and the pressure plate 31 and is sleeved on the sliding column 300. The sliding column 300 is arranged on the bottom surface of the top plate 30 and inserted into the first through hole 310 of the pressure plate 31. After the pressure plate 31 is subjected to an upward force, the pressure plate 31 moves upward relative to the top plate 30, and the sliding column 300 moves downward relative to the pressure plate 31 in the first through hole 310. When the pressure plate 31 moves upward, the compression spring 301 is compressed. The compression spring 301 generates a force in the opposite direction to buffer the upward force of the pressure plate 31. The two ends of the compression spring 301 are correspondingly connected to the bottom surface of the top plate 30 and the top surface of the pressure plate 31;In this way, during use, the pressing plate 31 is first positioned in a horizontal position, and the pressing block 32 then presses the product vertically downward to ensure that the direction of the pressure on the product is vertically downward, and the product will not be displaced. The pressing plate 31 is provided with a second through hole 311, and the top plate 30 is provided with a first cylinder 302. The pressing block 32 is extended or retracted into the second through hole 311 by the drive of the first cylinder 302, that is, the pressing block 32 is in the second through hole 311, and the pressing block 32 is connected to the piston rod of the first cylinder 302. The first cylinder 302 is installed at a position on the top plate 30 corresponding to the second through hole 311. The piston rod of the first cylinder 302 is directed toward the second through hole 311 and extends in the vertical direction; in the initial state, the pressing block 32 is in the second through hole 311, at this time, the pressing plate 31, the first cylinder 302 and the pressing block 32 all move up and down synchronously with the top plate 30, after the pressing plate 31 is positioned, the pressing block 32 moves vertically downward under the drive of the first cylinder 302 to press on the product, to achieve vertical flattening and pressure maintenance, at this time, a relatively sliding groove and a sliding protrusion are provided between the hole wall of the pressing block 32 and the second through hole 311 to guide the sliding of the pressing block 32; a vertical downward protrusion on the pressing plate 31 is provided The bottom surface of the plate 31 is provided with a positioning sleeve 4 with a positioning hole 40 on the end surface of the bottom end. The positioning hole 40 is provided on the end surface of the lower end of the positioning sleeve 4. The positioning hole 40 can be a blind hole or a through hole. After the elastic positioning column 6 is inserted into the positioning hole 40, it abuts against the hole wall of the positioning hole 40 to form a positioning for the pressure plate. The positioning sleeve 4 can be directly installed on the bottom surface of the pressure plate 31 or a notch is set on the side wall of the pressure plate 31, and then the positioning sleeve 4 is installed in the notch and the lower part of the positioning sleeve 4 protrudes from the bottom surface of the pressure plate 31. In the process of the pressure plate 31 moving downward, the positioning sleeve 4 is first engaged with the elastic positioning column 6 for pre-positioning, and the pressure plate After 31 continues to move downward, the pressing plate 31 abuts against the top of the fixing column 7 to position the pressing plate 31 in the horizontal direction; the frame 1 is also provided with a base 5 with a positioning mechanism on the top surface which can move horizontally to the position directly below the pressing plate 31. The base 5 is arranged on the frame 1 and can move horizontally on the frame 1 to the position directly below the pressing plate 31. For example, a second guide rail is arranged on the frame 1 in the horizontal direction below the pressing plate 31. The second guide rail is a linear guide rail. The base 5 slides on the second guide rail to the position directly below the pressing plate 31 by the driving cylinder of the second guide rail. Matching sliding grooves and sliders are arranged between the base 5 and the second guide rail.The positioning mechanism on the top surface of the base 5 is used to position the product. The corresponding positioning mechanism is set according to the corresponding product. The base 5 is provided with an elastic positioning column 6, such as a spring plunger, which can match and limit the positioning sleeve 4. In this way, during the downward movement of the pressing plate 31, the positioning sleeve 4 first engages with the elastic positioning column 6 to slow down the downward movement of the pressing plate 31. The base 5 is also provided with at least three equal-height fixed columns 7 that can form the vertices of a polygon. The heights of the fixed columns 7 are the same. For example, if three fixed columns 7 are set, the three fixed columns 7 are located at the three vertices of the triangle. If four fixed columns 7 are set, the four fixed columns 7 are located at the four vertices of the rectangle. At this time, the height of the elastic positioning column 6 is slightly higher than the height of the fixed column 7. In this way, during the downward movement of the pressing plate 31, the positioning sleeve 4 first presses the elastic positioning column 6 downward to buffer the downward movement of the pressing plate 31. If it continues to move downward, the bottom surface of the pressing plate 31 presses against the top surface of the fixed column 7. The multiple fixed columns 7 are equal in height, so that the pressing plate 31 is kept in a horizontal state at this height. ;

[0023] Further improvements, such as Figure 1 As shown in the figure, two pressure plate brackets 2 are arranged on the frame 1 in parallel and at intervals, and a pressure plate assembly 3 is arranged on each pressure plate bracket 2; two bases 5 corresponding to the two pressure plates 31 are arranged on the frame 1, and each base 5 is provided with an elastic positioning column 6 and at least three fixed columns 7 of the same height, that is to say, two pressure maintaining stations are arranged in parallel on the same frame 1, realizing double-station work and improving production efficiency.

[0024] Further improvements, such as Figures 3 to 5 As shown in , the pressing plate 31 is provided with an auxiliary presser foot 8 that passes through the pressing plate 31 and can move elastically relative to the pressing plate 31. After the pressing plate 31 is positioned by the fixed column 7, the auxiliary presser foot 8 is also pressed against the product. At this time, when the pressing plate 31 continues to be pressed down, the pressing plate 31 does not move, and the auxiliary presser foot 8 retracts relative to the pressing plate 31 under the action of elastic force to maintain a certain pressure on the product. For example, a countersunk through hole is set at the top of the pressing plate 31, and the auxiliary presser foot 8 is set into a T-shaped structure, and then the auxiliary presser foot 8 is inserted into the countersunk through hole, and a through hole cover is set on the top of the countersunk through hole, and then a compression spring is set between the auxiliary presser foot 8 and the through hole cover; in the initial state, the lower end of the auxiliary presser foot 8 protrudes from the bottom of the countersunk through hole. When the auxiliary presser foot 8 is pressed against the product, the auxiliary presser foot 8 will retract relative to the countersunk through hole, and the compression spring will also be subjected to a compressed force.

[0025] Further improvements, such as Figure 5 As shown in the figure, the positioning hole 40 is a trumpet-shaped structure with a gradually increasing diameter from the inside to the outside, which facilitates the insertion of the elastic positioning column 6 into the positioning sleeve 4 and can also well adapt to the elastic positioning column 6 with a ball-shaped head structure.

[0026] Further improvements, such as Figure 1and Figure 2 As shown in , two elastic positioning columns 6 are provided, and the two elastic positioning columns 6 are arranged in the middle position of the two opposite sides of the top surface of the base 5, and at least one fixed column 7 is provided on both sides of each elastic positioning column 6, and two positioning sleeves 4 are provided on the pressure plate 31, so that a multi-point positioning mechanism can be formed, which can better ensure that the pressure plate 31 can be in a horizontal position when pressurized. If an elastic positioning column 6 is provided on the front and rear sides of the base 5, a positioning sleeve 4 is also provided on the front and rear sides of the pressure plate 31, and at the same time, a fixed column 7 is provided on the left and right sides of the elastic positioning column 6 on the front side of the base 5, and they are arranged in parallel at intervals, and a fixed column 7 is also provided on the left and right sides of the elastic positioning column 6 on the rear side of the base 5.

[0027] Further improvements, such as Figure 2 As shown in the figure, the positioning mechanism includes a base 50 arranged on the top surface of the base 5, a positioning pin 51 and / or a suction cup 52 arranged on the base 50, and a plurality of positioning pins 51 are arranged on the top surface of the base 50 according to the size of the product to be pressurized. The plurality of positioning pins 51 enclose a placement space that matches the product to be pressurized, and the suction cup 52 is arranged on the top surface of the base 50 in the placement space, through which the product to be pressurized is positioned. At the same time, a baffle can be arranged between two adjacent positioning pins 51 on the top surface of the base 5 for further positioning.

[0028] Further improvements, such as Figure 2 As shown in the figure, the base 5 is also provided with a pressure sensor 53 for monitoring the pressure of the pressing block 32. The pressure applied to the product is monitored by the pressure sensor 53 to facilitate regulation. At this time, the pressure sensor 53 can be set on the surface of the base 5 for placing the product to be processed.

[0029] In actual application, if a vertical support frame 10 is installed on the left side of the top surface of the frame 1, a mounting plate is set on the top of the support frame 10, and a vertical first guide rail 100 is set in front and rear of the right side wall of the support frame 10 below the mounting plate, which can be respectively called the front first guide rail and the rear first guide rail, so that a double-station pressure maintaining device can be formed; a second cylinder 101 is installed at the position corresponding to the front first guide rail on the top surface of the mounting plate, and the piston rod of the second cylinder 101 passes through the corresponding through hole on the mounting plate and is connected to the pressure plate bracket 2, and the pressure plate bracket 2 slides on the front first guide rail as a slider; the pressure plate assembly 3 sliding on the front first guide rail is called the front pressure plate assembly, and its top plate 30 and pressure plate 31 are both arranged in a square structure, and two sets of elastically connected structures are arranged on their front and rear sides, fixed Two position sleeves 4 are also provided and are correspondingly provided between the two groups of elastic connection structures on the front side and between the two groups of elastic connection structures on the rear side; two pressure blocks 32 are also provided, and the first cylinder 302 for driving the pressure blocks 32 is provided at the left rear edge and the right front edge of the top plate 30; the base 5 adopts a square structure base 5, and a linear guide rail in the left and right directions is provided on the frame 1, and the base 5 slides left and right on the linear guide rail as a slider, at this time, a square structure base 50 is provided on the base 5, and a pressure sensor 53 is provided between the base 50 and the base 5, and a suction cup 52 and a positioning pin 51 are correspondingly provided on the top of the base 50, and at the same time, a fixed column 7, an elastic positioning column 6 and another positioning column 7 are arranged in parallel from left to right in sequence at intervals on the base 5 corresponding to the front side of the base 50, and the same arrangement is also made on the base 5 corresponding to the rear side of the base 50. In the double-station pressure-maintaining device, the components corresponding to the first guide rail on the rear side can be arranged in the same way as the first guide rail on the front side. Such a double-station setting improves efficiency. The base 5 moves horizontally to realize material pulling and conveying. The cooperation of the pressure plate assembly 3 and the fixed column 7 of the same height, combined with the precise positioning of the elastic positioning column 6 and the positioning sleeve 4, can achieve the pressure-maintaining floating pressure plate 31 to be kept in a horizontal position, and then the pressure block 32 is extended to avoid the displacement of small auxiliary materials or parts, realize vertical flattening and pressure maintenance, and ensure its position and accuracy.

[0030] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A pressure-maintaining device, characterized in that: The machine comprises a frame, on which is provided a pressure plate bracket capable of moving up and down in a vertical direction, and on which is provided a pressure plate assembly; the pressure plate assembly comprises a top plate connected to the pressure plate bracket, a pressure plate elastically connected to the bottom surface of the top plate, and a pressure block arranged on the top plate and passing through the pressure plate and capable of moving up and down relative to the pressure plate in a vertical direction; the pressure plate is provided with a positioning sleeve protruding from the bottom surface of the pressure plate and having a positioning hole on the end surface of the bottom; the frame is also provided with a base capable of horizontally moving to the top surface directly below the pressure plate and provided with a positioning mechanism, the base is provided with an elastic positioning column capable of matching and limiting engagement with the positioning sleeve, and the base is also provided with at least three fixing columns of equal height that can form the vertices of a polygon.

2. The pressure maintaining device according to claim 1, characterized in that : Two pressure plate brackets are arranged on the frame in parallel and at intervals, and each of the pressure plate brackets is provided with a pressure plate assembly; two bases corresponding to the two pressure plates are arranged on the frame, and each of the bases is provided with an elastic positioning column and at least three fixed columns of equal height.

3. The pressure maintaining device according to claim 1 or 2, characterized in that The pressure plate is provided with a first through hole, the top plate is provided with a sliding column sliding in the first through hole, and a compression spring sleeved on the sliding column is provided between the top plate and the pressure plate.

4. The pressure maintaining device according to claim 1, characterized in that : A second through hole is arranged on the pressing plate, and a first cylinder is arranged on the top plate. The pressing block is extended out or retracted into the second through hole by the driving of the first cylinder.

5. The pressure maintaining device according to claim 1, characterized in that The pressing plate is provided with an auxiliary pressing foot which passes through the pressing plate and can move elastically relative to the pressing plate.

6. The pressure maintaining device according to claim 1, characterized in that : A support frame is arranged on the frame, a first guide rail along the vertical direction is arranged on the support frame, a second cylinder is also arranged on the support frame, and the pressure plate bracket is slidably arranged on the first guide rail through the driving of the second cylinder.

7. The pressure maintaining device according to claim 1, characterized in that The positioning hole is a trumpet-shaped structure with a diameter gradually increasing from the inside to the outside.

8. The pressure maintaining device according to claim 1, characterized in that : There are two elastic positioning columns, and the two elastic positioning columns are arranged in the middle position on the opposite sides of the top surface of the base. At least one fixing column is arranged on both sides of each elastic positioning column, and two positioning sleeves are arranged on the pressure plate.

9. The pressure maintaining device according to claim 1, characterized in that The positioning mechanism includes a base arranged on the top surface of the base, a positioning pin and / or a suction cup arranged on the base.

10. The pressure maintaining device according to claim 1, characterized in that The base is also provided with a pressure sensor for monitoring the pressure of the pressing block.

Images