Multi-head pressure maintaining mechanism

Abstract

The utility model relates to the technical field of pressure maintaining equipment, in particular to a multi-head pressure maintaining mechanism which comprises a plurality of groups of pressure head structures and a jacking structure, an external product to be subjected to pressure maintaining is arranged between the pressure head structures and the jacking structure, the multi-head pressure maintaining mechanism further comprises a mounting frame, the pressure head structures are located at the top of the mounting frame, and the jacking structure is located in the mounting frame; any pressure head structure sequentially comprises a stepping screw rod electric cylinder, a connecting shaft, a pressure sensor, a spring piece and a pressure head in the downward pressing direction, and the connecting shaft is provided with an upper rotation stopping piece used for limiting axial movement of the output end of the stepping screw rod electric cylinder and a lower guide sleeve used for limiting radial movement of the output end of the stepping screw rod electric cylinder. An external product is synchronously extruded through a plurality of groups of pressure head structures and jacking structures, each group of pressure head structure comprises a spring piece connected with a pressure head and a pressure sensor for sensing the pressure of the spring piece, and the pressure maintaining intensity is further dynamically controlled within a certain range through a stepping screw rod electric cylinder, a rotation stopping sleeve and a guide sleeve.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of pressure-holding equipment, and particularly relates to a multi-head pressure-holding mechanism. Background Art

[0002] In the automated manufacturing process of many products, it is necessary to detect their usage functions. Among them, there is a mechanism that needs to press the product and hold it for a certain period of time to complete the detection work. Since the shapes of the products to be detected are diverse, the required pressing forces during pressure-holding are also different. In the prior art, generally, a single pressing head cannot perform synchronous pressure-holding on multiple products at the same time, resulting in low pressure-holding efficiency. Moreover, during the pressure-holding process, if the pressing head wears, the pressure-holding pressure will change, leading to errors. Content of the Utility Model

[0003] Aiming at the above problems existing in the prior art, the purpose of the utility model is to provide a multi-head pressure-holding mechanism that can perform synchronous pressure-holding on multiple products and the pressure-holding force can be dynamically adjusted according to the actual pressure.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme: A multi-head pressure-holding mechanism includes a pressing head structure and a jacking structure. An external product to be pressure-held is between the pressing head structure and the jacking structure. It also includes a mounting frame. The number of the pressing head structures is multiple and they are located at the top of the mounting frame. The jacking structure is located inside the mounting frame. Any one of the pressing head structures sequentially includes a stepping screw electric cylinder, a connecting shaft, a pressure sensor, a spring member, and a pressing head along the downward pressing direction. An upper anti-rotation member for restricting the axial movement of the output end of the stepping screw electric cylinder and a lower guiding sleeve for restricting the radial movement are arranged on the connecting shaft. The jacking structure includes a telescopic cylinder. A slider is fixed to the telescopic end of the telescopic cylinder. An inclined wedge is arranged on the slider. A jacking head is arranged on the inclined wedge.

[0005] Preferably, the front end part of the output end of the stepping screw electric cylinder forms a threaded end, and the end part forms a downward pressing end. The connecting shaft is a hollow shaft. The outer diameter of the threaded end is the same as the inner diameter of the connecting shaft. An annular opening is formed inside the upper anti-rotation member. The upper anti-rotation member is embedded in the connecting shaft and further extends inward. The inner diameter of the upper anti-rotation member is the same as the outer diameter of the downward pressing end. The axial stepping range of the output end of the stepping screw electric cylinder is restricted by the upper anti-rotation member.

[0006] Preferably, the mounting frame is a C-shaped structure. The top of the mounting frame is provided with an opening through which the connecting shaft is inserted. The lower guiding sleeve is an annular sleeve. The outer wall of the lower guiding sleeve is fixedly connected to the hole wall of the mounting frame. The inner wall of the lower guiding sleeve tightly abuts against the outer wall of the connecting shaft. The radial movement of the output end of the stepping screw electric cylinder is restricted by the lower guiding sleeve.

[0007] Preferably, a buffer pressing block is formed at the end of the spindle, and the buffer pressing block is located between the spindle and the pressure sensor, so as to prevent the spindle from directly contacting the sensor and causing wear.

[0008] Preferably, a chute that fits the slider is fixed inside the mounting frame, and the chute is located at the bottom of the slider to guide the movement of the slider.

[0009] Further, clamping blocks are fixed on both sides of the chute, the wedge is vertically clamped between the two clamping blocks, the inclined surface of the wedge is at the bottom, and the top of the slider fits the bottom of the wedge, so that the wedge moves vertically under the push of the slider through the two clamping blocks.

[0010] Preferably, an adjusting bolt is threadedly arranged between the wedge and the top head to adjust the distance between the wedge and the top head.

[0011] Preferably, support plates are fixed on both sides of the top of the mounting frame, fixing plates are fixed on the support plates, the stepper screw electric cylinder is fixed on the fixing plates, and the output end of the stepper screw electric cylinder penetrates the fixing plate and is inserted into the spindle, so as to fix the stepper screw electric cylinder through the support plates and the fixing plates.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The external product is synchronously extruded by multiple sets of pressing head structures and jacking structures, and each set of pressing head structures includes a spring member connected to the pressing head and a pressure sensor for sensing the pressure of the spring member. Further, the holding pressure is dynamically controlled within a certain range through the stepper screw electric cylinder, the anti-rotation sleeve and the guide sleeve to avoid changes in the actual holding pressure after the pressing head wears;

[0014] The distance between the top head and the wedge in the vertical direction is adjusted by the adjusting bolt between the top head and the wedge in the jacking structure, and the wedge moves vertically to drive the top head to move synchronously through the inclined surface setting of the wedge and the slider. The combination of the two adjustment methods provides a large adjustment range.

[0015] The following will explain the present utility model in detail in combination with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are only used to show the principles, implementation methods, applications, characteristics, effects, etc. of the specific implementation manners and other related contents of the present utility model, and should not be considered as a limitation to the present utility model.

[0017] In the accompanying drawings of the specification:

[0018] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is the overall structure sectional view of the present utility model;

[0020] Figure 3 is the internal schematic view of the pressure head structure of the present utility model;

[0021] Figure 4 is the enlarged view of the structure at position A of the present utility model;

[0022] Figure 5 is the retracted state diagram of the jacking structure of the present utility model;

[0023] Figure 6 is the extended state diagram of the jacking structure of the present utility model;

[0024] Reference numerals:

[0025] 1. Pressure head structure; 11. Stepping screw electric cylinder; 111. Thread end; 112. Lower pressing end; 12. Connecting shaft; 13. Upper anti-rotation part; 14. Lower guide sleeve; 15. Buffer pressing block; 16. Pressure sensor; 17. Spring part; 18. Pressure head; 2. Jacking structure; 21. Slide groove; 22. Clamping block; 23. Slide block; 24. Wedge; 25. Telescopic cylinder; 26. Adjusting bolt; 27. Jacking head; 3. Mounting frame; 4. Support plate; 5. Fixed plate. Detailed implementation manners

[0026] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0027] The technical solution of the present utility model will be further described below in conjunction with the drawings and through specific implementation manners.

[0028] The embodiment of the present utility model provides a multi-head pressure maintaining mechanism, which can perform synchronous pressure maintaining on a variety of products and the pressure maintaining force can be dynamically adjusted according to the actual pressure.

[0029] Such as Figures 1 to 6As shown in the figure, a multi-head pressure-holding mechanism includes a punch structure 1 and a jacking structure 2. An external product to be pressure-held is located between the punch structure 1 and the jacking structure 2. The mechanism also includes a mounting bracket 3. The number of the punch structures 1 is six groups, and all of them are located at the top of the mounting bracket 3. The jacking structure 2 is located inside the mounting bracket 3. Any one group of the punch structures 1 includes a stepping screw electric cylinder 11, a connecting shaft 12, a pressure sensor 16, a spring member 17, and a punch 18 in sequence along the downward pressing direction. An upper anti-rotation member 13 for restricting the axial movement of the output end of the stepping screw electric cylinder 11 and a lower guide sleeve 14 for restricting the radial movement are provided on the connecting shaft 12. The jacking structure 2 includes a telescopic cylinder 25. A slider 23 is fixed to the telescopic end of the telescopic cylinder 25. A wedge 24 is provided on the slider 23. An adjusting bolt 26 is threadedly arranged on the wedge 24, and a top head 27 is fixed to the adjusting bolt 26.

[0030] The related structures for the stepping movement of the output end of the stepping screw electric cylinder 11 belong to the prior art, so no further description will be given. The front end part of the output end of the stepping screw electric cylinder 11 forms a threaded end 111, and the end part forms a downward pressing end 112. The connecting shaft 12 is a hollow shaft. The outer diameter of the threaded end 111 is the same as the inner diameter of the connecting shaft 12. An annular opening is formed inside the upper anti-rotation member 13. The upper anti-rotation member 13 is embedded in the connecting shaft 12 and further extends inward. The inner diameter of the upper anti-rotation member 13 is the same as the outer diameter of the downward pressing end 112. When the threaded end 111 steps to above the anti-rotation sleeve 13, it stops rotating and stepping, and the downward pressing end 112 also stops pressing downward simultaneously to limit the downward pressing range in the vertical direction.

[0031] The mounting bracket 3 is a C-shaped structure. The top of the mounting bracket 3 is provided with holes through which the connecting shaft 12 is inserted. The lower guide sleeve 14 is an annular sleeve, which is composed of two circular rings with different diameters. The circular ring with a smaller diameter is tightly fixed against the inner wall of the hole of the mounting bracket 3, and the circular ring with a larger diameter is tightly fixed against the lower part of the top of the mounting bracket 3. The inner wall of the lower guide sleeve 14 tightly abuts against the outer wall of the connecting shaft 12 to limit the radial sway of the connecting shaft 12 and concentrate the downward pressure.

[0032] A buffer pressing block 15 is formed at the end of the connecting shaft 12. The buffer pressing block 15 is located between the connecting shaft 12 and the pressure sensor 16. The buffer pressing block 15 is a rubber block.

[0033] A chute 21 that fits with the slider 23 is fixed inside the mounting bracket 3. The chute 21 is located at the bottom of the slider 23. Clamping blocks 22 are fixed to both sides of the chute 21 perpendicular to the sliding direction. A connecting rod is provided between the two clamping blocks 22 for fixed connection. The wedge 24 is clamped between the two clamping blocks 22 in the vertical direction. The inclined surface of the wedge 24 is at the bottom, and the top of the slider 23 fits with the bottom of the wedge 24.

[0034] On the front and rear sides of the top of the mounting bracket 3, support plates 4 are fixed. Above the support plates 4, a fixing plate 5 is fixed. The six stepping screw electric cylinders 11 are equally spaced in two rows above the fixing plate 5. The output end of any one of the stepping screw electric cylinders 11 penetrates the fixing plate 5 and inserts into the corresponding connecting shaft 12. An observation window is opened on the support plate 4, and the connection state between the stepping screw electric cylinder 11 and the connecting shaft 12 can be directly observed through the observation window.

[0035] The implementation principle of the embodiment of this application is as follows: When this pressure-holding mechanism is used, first, six external products are conveyed in a group through the assembly line between the six sets of pressing head structures 1 and the jacking structures 2. According to the respective requirements of the six external products, different pressure-holding forces of the pressing head structures 1 are preset. Then, the stepping screw electric cylinders 11 are started. The downward pressing end 112 of the stepping screw electric cylinder 11 steps down along the inner wall of the connecting shaft 12 within the range restricted by the upper stop member 13 and the lower guide sleeve 14 to the bottom of the connecting shaft 12, further driving the pressure sensor 16 below the connecting shaft 12 to squeeze the spring member 17 and the pressing head 18 downward. The pressure sensor 16 real-time detects the actual pressure data of the spring member 17 and controls the stepping screw electric cylinder 11 to always keep the actual pressure at the preset value, realizing synchronous pressure-holding for multiple products and dynamically adjusting the pressure-holding force according to the actual pressure.

[0036] If the horizontal height of the bottom of the external product assembly line does not match the jacking structure 2, first rotate the adjusting bolt 26 to move the top head 27 vertically relative to the inclined wedge 24 to a roughly appropriate height position. Then, start the telescopic cylinder 25. The telescopic end of the telescopic cylinder 25 drives the slider 23 to move horizontally, further driving the top head 27 to move vertically. When the top head 27 moves to the appropriate position, turn off the telescopic cylinder 25. The two adjustment methods are combined to meet the horizontal height adjustment requirements of the top head 27.

[0037] For those skilled in the art, it is obvious that this application is not limited to the details of the above exemplary embodiments, and without departing from the basic features of this application, this application can be implemented in other specific forms. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of this application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in this application. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A multi-head pressure-holding mechanism, comprising a punch structure (1) and a jacking structure (2), with an external product to be pressure-held between the punch structure (1) and the jacking structure (2), characterized in that: It further includes a mounting bracket (3), the number of the pressing head structures (1) is multiple groups and they are located at the top of the mounting bracket (3), and the jacking structure (2) is located inside the mounting bracket (3); Any one of the pressing head structures (1) sequentially includes a stepping screw electric cylinder (11), a coupling shaft (12), a pressure sensor (16), a spring member (17) and a pressing head (18) along the downward pressing direction. An upper anti-rotation member (13) for restricting the axial movement of the output end of the stepping screw electric cylinder (11) and a lower guide sleeve (14) for restricting the radial movement are arranged on the coupling shaft (12); The jacking structure (2) includes a telescopic cylinder (25), a slider (23) is fixed to the telescopic end of the telescopic cylinder (25), a wedge (24) is arranged on the slider (23), and a jacking head (27) is arranged on the wedge (24).

2. The multi-head pressure maintaining mechanism according to claim 1, characterized in that: The front end part of the output end of the stepping screw electric cylinder (11) forms a threaded end (111), and the end part forms a downward pressing end (112). The coupling shaft (12) is a hollow shaft. The outer diameter of the threaded end (111) is the same as the inner diameter of the coupling shaft (12). An annular opening is formed inside the upper anti-rotation member (13). The upper anti-rotation member (13) is embedded in the coupling shaft (12) and further extends inward. The inner diameter of the upper anti-rotation member (13) is the same as the outer diameter of the downward pressing end (112).

3. The multi-head pressure-holding mechanism according to claim 1, characterized in that: The mounting bracket (3) is of a C-shaped structure. The top of the mounting bracket (3) is provided with an opening through which the coupling shaft (12) is inserted. The lower guide sleeve (14) is an annular sleeve. The outer wall of the lower guide sleeve (14) is fixedly connected to the hole wall of the mounting bracket (3), and the inner wall of the lower guide sleeve (14) abuts against the outer wall of the coupling shaft (12).

4. The multi-head pressure maintaining mechanism according to claim 1, characterized in that: A buffer pressing block (15) is formed at the end of the coupling shaft (12), and the buffer pressing block (15) is located between the coupling shaft (12) and the pressure sensor (16).

5. The multi-head pressure maintaining mechanism according to claim 1, characterized in that: A chute (21) that fits with the slider (23) is fixed inside the mounting bracket (3), and the chute (21) is located at the bottom of the slider (23).

6. The multi-head pressure maintaining mechanism according to claim 5, characterized in that: Clamping blocks (22) are fixed on both sides of the chute (21). The wedge (24) is clamped between the two clamping blocks (22) in the vertical direction. The inclined surface of the wedge (24) is located at the bottom, and the top of the slider (23) fits with the bottom of the wedge (24).

7. A multi-head pressure maintaining mechanism according to claim 1, characterized in that: An adjusting bolt (26) is threadedly arranged between the wedge (24) and the jacking head (27).

8. A multi-head pressure-holding mechanism according to claim 1, characterized in that: Support plates (4) are fixed on both sides of the top of the mounting bracket (3). A fixing plate (5) is fixed on the support plates (4). The stepping screw electric cylinder (11) is fixed on the fixing plate (5), and the output end of the stepping screw electric cylinder (11) penetrates through the fixing plate (5) and is inserted into the coupling shaft (12).

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