Pressure maintaining device capable of adjusting pressure

Abstract

The utility model relates to a pressure maintaining device capable of adjusting pressure, which comprises a support and a pressure maintaining device, the support comprises a first platform part and a second platform part, the first platform part is used for placing a to-be-pressed product, and the second platform part is vertically arranged above the first platform part; the connecting rod assembly is installed on the second platform part and comprises a connecting rod supporting sleeve, an upper connecting rod, a middle connecting rod and a lower connecting rod, and the connecting rod supporting sleeve is fixedly arranged in the second platform part; the lower connecting rod is vertically installed in the connecting rod supporting sleeve and moves in the axial direction of the connecting rod supporting sleeve. One end of the lower connecting rod extends out of the connecting rod supporting sleeve and is connected with the pressing head; the middle connecting rod is partially located in the connecting rod supporting sleeve, and the other end of the middle connecting rod is movably connected with the upper connecting rod. One end of the upper connecting rod is movably arranged on the connecting rod supporting sleeve; the force application assembly is arranged on one side of the connecting rod assembly and connected with the other end of the upper connecting rod in a position adjustable mode. The pressure maintaining force is adjusted by adjusting the vertical position of the connecting rod supporting sleeve and the connecting point of the force applying assembly and the upper connecting rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressure maintaining, in particular to a pressure maintaining device with adjustable pressure. BACKGROUND

[0002] With the rapid development of new material development and production manufacturing field technology, higher requirements are put forward for the pressure adjusting range, precision and lightweight structure of the pressure maintaining mechanism. In order to meet the diversified pressure maintaining requirements, the industry has developed pressure maintaining technologies based on weights, springs and cylinders.

[0003] In related technologies, the weight pressure maintaining adopts a way of adjusting pressure by gradually stacking weights, which has simple structure and high stability, but the pressure increment is limited by the weight of a single weight, resulting in insufficient minimum adjustment precision; the spring pressure maintaining controls pressure through the pre-pressing spring deformation variable, which has lightweight advantage, but its pressure range is limited by the spring stiffness, and long-term use can easily lead to precision decline due to material fatigue; the cylinder pressure maintaining relies on external gas source to drive the piston to pressurize, which can achieve dynamic control by adjusting gas pressure, but its output pressure is limited by the gas source pressure, and a complex pneumatic system is needed, which has high energy consumption.

[0004] However, the above pressure maintaining methods and related devices still have problems such as limited pressure range, high redundancy of the device, insufficient adaptability, etc. CONTENT OF THE INVENTION

[0005] Therefore, the present application provides some embodiments of a pressure maintaining device with adjustable pressure, at least one of which can be used to solve the problems of limited pressure range and insufficient adaptability of the pressure maintaining device.

[0006] A pressure maintaining device with adjustable pressure comprises:

[0007] A support comprises a first platform part and a second platform part, the first platform part is used for placing products, and the second platform part is arranged above the first platform part in the vertical direction;

[0008] A connecting rod assembly is installed on the second platform part and comprises a connecting rod support sleeve, an upper connecting rod, a middle connecting rod and a lower connecting rod, the connecting rod support sleeve is fixedly arranged in the second platform part; the lower connecting rod is installed in the connecting rod support sleeve in the vertical direction and moves along the axial direction, one end of the lower connecting rod is connected with a pressure head outside the connecting rod support sleeve, and the other end of the lower connecting rod is movably connected with one end of the middle connecting rod; the middle connecting rod is partially arranged in the connecting rod support sleeve, and the other end of the middle connecting rod is movably connected with the upper connecting rod; one end of the upper connecting rod is movably arranged on the connecting rod support sleeve;

[0009] A force applying assembly is arranged on one side of the connecting rod assembly, and the other end of the upper connecting rod is adjustably connected with the force applying assembly.

[0010] In one of the embodiments, the upper connecting rod is bent, one end of which is movably connected with the connecting rod supporting sleeve; the middle connecting rod is inclined, the top end of which is movably connected with the bending part of the upper connecting rod; the top end of the lower connecting rod is movably connected with the bottom end of the middle connecting rod, and the bottom end of the lower connecting rod extends out of the connecting rod supporting sleeve and is connected with the pressing head.

[0011] In one of the embodiments, the upper connecting rod comprises a long diameter section and a short diameter section connected with each other, and an angle is formed between the long diameter section and the short diameter section.

[0012] In one of the embodiments, the force applying assembly comprises a weight, the bottom of which is provided with a mounting groove, and a mounting hole is arranged in the mounting groove; the long diameter section is arranged in the mounting groove, and a movable hole is arranged on the long diameter section at a position corresponding to the mounting hole, the length of the movable hole is greater than the length of the mounting hole, and a bolt is fixedly arranged in the movable hole and the mounting hole.

[0013] In one of the embodiments, the second platform part is a supporting seat, which is arranged transversely on the support, the connecting rod supporting sleeve is arranged through the supporting seat, and a threaded hole is arranged on one side of the supporting seat, and a fastening bolt is arranged in the threaded hole and abuts against the connecting rod supporting sleeve.

[0014] In one of the embodiments, the weight rotates in a vertical plane; the center of gravity of the weight is P1, the connecting point of the short diameter section and the connecting rod supporting sleeve is P2, the connecting point of the bending part of the upper connecting rod and the middle connecting rod is P3, and the connecting point of the middle connecting rod and the lower connecting rod is P4.

[0015] The horizontal distance from P1 to P2 is D1, the horizontal distance from P2 to P3 is D2, and the horizontal distance from P1 to P3 is D3.

[0016] When the gravity of the weight is F1, the vertical downward component of the pressure of the weight and the upper connecting rod on the middle connecting rod is F2, and the vertical downward component of the pressure of the middle connecting rod on the lower connecting rod and the pressing head is F3; the pressure on the product is F; wherein F, F2 and F3 satisfy the relationship F=F2=F3.

[0017] In one of the embodiments, the angle between the line connecting P2 and P3 and the line connecting P2 and P4 is R1, the angle between the line connecting P2 and P4 and the line connecting P3 and P4 is R2, and the angle between the central axis of the weight and the horizontal plane on which the weight is arranged is R3; when the angle between the line connecting P2 and P3 and the line connecting P1 and P3 is 90°, R1 and R3 satisfy the relationship R1=R3, and F1, F2, D1 and D2 satisfy the relationship D1*F1=D2*F2.

[0018] In one of the embodiments, the vertical distance from the first platform upper surface to the product upper surface is H1, the vertical distance from the product upper surface to the support base lower surface is H2, the vertical distance from the support base lower surface to P2 is H3, the vertical distance from the product upper surface to P4 is H4, the vertical distance from P4 to P2 is H5, the vertical distance from the product upper surface to P2 is H6, and the vertical distance from P4 to P3 is H7.

[0019] When the distance from P2 to P3 is L1, the distance from P3 to P4 is L2, and the distance from P1 to P2 is L3, H2, H3, and H6 satisfy the relationship H6 = H2 + H3, and H4, H5, and H6 satisfy the relationship H6 = H4 + H5.

[0020] In one of the embodiments, D1, L3, and R3 satisfy the relationship D1 = L3 * COS R3.

[0021] D2, L1, and R1 satisfy the relationship D2 = L1 * SIN R1.

[0022] F1, F2, L1, L3, R1, and R3 satisfy the relationship F2 = (L3 * COS R1 * F1) / (L1 * SIN R1).

[0023] F, F1, L1, L3, and R1 satisfy the relationship F = (L3 * COS R1 * F1) / (L1 * SIN R1).

[0024] In one of the embodiments, the first platform includes a base and a fixing seat, the base is transversely arranged on one side of the support, the fixing seat has a recess on the top for placing the product, the bottom of the fixing seat is provided with a limiting hole, and the top of the base is provided with a limiting column for limiting cooperation with the limiting hole.

[0025] The pressure-adjustable pressure maintaining device can realize accurate adjustment of the pressure maintaining force by adjusting the position of the connecting rod support sleeve in the second platform and adjusting the connecting point of the force applying assembly and the upper connecting rod, so as to meet the pressure maintaining requirements of different products. The design of the connecting rod assembly simplifies the mechanical structure, makes the pressure maintaining device more compact, and improves the use efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic diagram of the pressure maintaining device.

[0027] Figure 2 FIG. 2 is a structural schematic diagram of the first platform.

[0028] Figure 3 FIG. 3 is a size marking schematic diagram of the pressure maintaining device. Figure 1 .

[0029] Figure 4 Dimensional marking for pressure maintaining device Figure 2 .

[0030] Figure 5 Structure diagram for force applying assembly.

[0031] Figure 6 Structure diagram for weight.

[0032] Figure 7 Front view diagram for different adjustment states.

[0033] Figure 8 Top view diagram for different adjustment states.

[0034] In the figure: 10, bracket; 11, first platform part; 111, base; 112, fixed seat; 113, groove; 12, second platform part; 121, support seat; 122, threaded hole; 13, product;

[0035] 20, connecting rod assembly; 21, connecting rod support sleeve; 22, upper connecting rod; 221, long diameter section; 222, short diameter section; 223, movable hole; 23, middle connecting rod; 24, lower connecting rod; 25, pressure head;

[0036] 30, force applying assembly; 31, weight; 32, mounting groove; 33, mounting hole;

[0037] 110, first pressure maintaining device; 120, second pressure maintaining device; 130, third pressure maintaining device; 140, fourth pressure maintaining device; 150, fifth pressure maintaining device. DETAILED DESCRIPTION

[0038] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0039] In the description of the application, it should be understood that, if there are these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application.

[0040] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0041] In this application, unless otherwise explicitly specified and limited, if there are terms such as "mounting", "connecting", "connecting", "fixing" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0042] In this application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "first feature on or under second feature", the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0043] It is to be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used herein only mean for the purpose of illustration, and do not indicate the only possible orientation.

[0044] In the related art, the minimum pressure regulating capacity is optimized by the combination of spring pre-tightening and weight superposition, but the structure limitation of large range pressure output cannot be broken through, and the device still has problems of large size, slow dynamic response, etc.

[0045] Referring to Figure 1 , Figure 1 Fig. 1 shows a structural schematic diagram of a pressure maintaining device in an embodiment of the present application.

[0046] To solve the above technical problems, an adjustable pressure pressure maintaining device is provided in an embodiment of the present application, which comprises a support 10, a connecting rod assembly 20 and a force applying assembly 30.

[0047] Specifically, the support 10 comprises a first platform part 11 and a second platform part 12, the first platform part 11 is used for placing a product to be pressed 13, and the second platform part 12 is vertically arranged above the first platform part 11. The connecting rod assembly 20 is installed on the second platform part 12, and the connecting rod assembly 20 comprises a connecting rod support sleeve 21, an upper connecting rod 22, a middle connecting rod 23 and a lower connecting rod 24, the connecting rod support sleeve 21 is fixedly arranged in the second platform part 12; the lower connecting rod 24 is vertically installed in the connecting rod support sleeve 21 and moves along the axial direction thereof; one end of the lower connecting rod 24 is connected with a pressing head 25 and extends out of the connecting rod support sleeve 21, and the other end of the lower connecting rod 24 is movably connected with one end of the middle connecting rod 23; the middle connecting rod 23 is partially arranged in the connecting rod support sleeve 21, and the other end of the middle connecting rod 23 is movably connected with the upper connecting rod 22. One end of the upper connecting rod 22 is movably arranged on the connecting rod support sleeve 21, the force applying assembly 30 is arranged on one side of the connecting rod assembly 20, and the other end of the upper connecting rod 22 is adjustably connected with the force applying assembly 30.

[0048] In one embodiment, the support 10 is composed of a first platform 11 and a second platform 12. The second platform 12 is vertically arranged above the first platform 11 with a space between them. The connecting rod support sleeve 21 is arranged through the second platform 12 and fixed by screws, bolts or the like. When the vertical position of the connecting rod support sleeve 21 needs to be adjusted, the bolts are loosened, the connecting rod support sleeve 21 is moved up and down along the axial direction of the second platform 12, driving the upper connecting rod 22, the middle connecting rod 23, the lower connecting rod 24 and the pressure head 25 to move together, thereby achieving vertical position adjustment.

[0049] Referring to Figure 1 In this embodiment, the vertical direction mentioned above can be understood as the direction from the top end of the connecting rod support sleeve 21 to the pressure head 25. The connecting rod support sleeve 21 moves up and down along the axial direction of the second platform 12, i.e. along the vertical direction, to achieve position adjustment.

[0050] In one embodiment, the lower connecting rod 24 is installed in the connecting rod support sleeve 21 and moves along the axial direction of the connecting rod support sleeve 21. One end of the lower connecting rod 24 extends out of the connecting rod support sleeve 21 and is connected to the pressure head 25, and the other end is connected to the middle connecting rod 23 for driving the pressure head 25 to press down. The middle connecting rod 23 is partially arranged in the connecting rod support sleeve 21, and one end of the middle connecting rod 23 away from the connecting rod support sleeve 21 is connected to one end of the upper connecting rod 22. One end of the upper connecting rod 22 is movably arranged on the connecting rod support sleeve 21, and the other end is movably connected to the force applying assembly 30. The downward force of the force applying assembly 30 on the upper connecting rod 22 is transmitted to the middle connecting rod 23 and the lower connecting rod 24, driving the pressure head 25 to move downward synchronously.

[0051] In one embodiment, the force applying assembly 30 is arranged on one side of the connecting rod assembly 20 and adjustably connected to the other end of the upper connecting rod 22. The force applying assembly 30 drives the upper connecting rod 22 to press down, and the gravity of the force applying assembly 30 is transmitted to the middle connecting rod 23 through the upper connecting rod 22. The vertical component of the force is transmitted to the lower connecting rod 24 through the middle connecting rod 23, driving the lower connecting rod 24 to move the pressure head 25 and press the product 13 to be pressed, thereby achieving the pressure maintaining process.

[0052] In the implementation process, the product 13 to be pressed is placed on the first platform part 11, and the pressing head 25 is aligned with the product 13 to be pressed. One end of the upper connecting rod 22 is arranged on the connecting rod support sleeve 21, and the connecting rod support sleeve 21 can move vertically along the second platform part 12, so that the vertical position of the entire connecting rod assembly 20 changes, that is, the vertical position of the upper connecting rod 22 changes. Since the upper connecting rod 22 is connected with the force applying assembly 30, the change of the vertical position of the upper connecting rod 22 causes the horizontal direction angle of the gravity of the upper connecting rod 22 subjected to the force applying assembly 30 to change, which causes the vertical component of the gravity to change, and affects the actual gravity of the upper connecting rod 22, that is, affects the holding pressure, so that the holding pressure is adjusted by changing the vertical position of the connecting rod support sleeve 21 in the second platform part 12.

[0053] In another implementation manner, the upper connecting rod 22 is connected with the force applying assembly 30, and the connection position of the force applying assembly 30 and the upper connecting rod 22 is adjusted, that is, the force arm distance of the vertical component of the gravity of the upper connecting rod 22 subjected to the force applying assembly 30 is changed, which causes the actual gravity of the upper connecting rod 22 to change, so as to adjust the holding pressure.

[0054] As described above, the precise adjustment of the holding pressure can be realized by adjusting the position of the connecting rod support sleeve 21 in the second platform part 12 and adjusting the connection point of the force applying assembly 30 and the upper connecting rod 22, so as to meet the holding pressure requirements of different products 13. The design of the connecting rod assembly 20 simplifies the mechanical structure, makes the holding pressure device more compact, and is convenient and simple to operate, thereby improving the use efficiency.

[0055] In combination with Figure 2 as shown, Figure 2 is a structural schematic view of the first platform part 11 provided in an embodiment of the present application. In some embodiments, the support 10 includes a vertically arranged support plate. The first platform part 11 includes a base 111 and a fixed seat 112.

[0056] Specifically, the base 111 is transversely arranged on one side of the support 10, and one end of the base 111 is connected with the support 10. The fixed seat 112 is arranged on the base 111 and is used for placing the product 13 to be pressed. The second platform part 12 includes a support seat 121, which is transversely arranged on one side of the support 10 and is located above the fixed seat 112. There is a spacing between the fixed seat 112 and the support seat 121. The connecting rod support sleeve 21 is vertically movably arranged in the support seat 121 and moves along the axial direction of the support seat 121, so as to adjust the vertical position of the connecting rod support sleeve 21.

[0057] Referring to Figure 1In the embodiment, the transverse direction mentioned above can be understood as the direction perpendicular to the vertical arrangement of the support 10, that is, the direction perpendicular to the vertical movement direction of the connecting rod support sleeve 21. Taking the support seat 121 as an example, the direction from one end of the support seat 121 close to the support 10 to the other end away from the support 10 is the transverse direction.

[0058] In one of the embodiments, the fixing seat 112 is a plate-shaped structure, one end of the fixing seat 112 is transversely arranged on the support plate through a connecting member such as a screw, and a recess 113 for placing the product to be pressed 13 is arranged on the top of the fixing seat 112. The recess 113 is used to limit and fix the product to be pressed 13, so that the product to be pressed 13 does not shift or displace during the pressure maintaining process, thereby improving the stability of the pressure maintaining.

[0059] In the embodiment, the shape and size of the recess 113 of the fixing seat 112 are adjusted according to the structure of the product to be pressed 13, which will not be described here.

[0060] In one of the embodiments, the base 111 is a plate-shaped structure, and one end of the base 111 is installed on one side of the support 10 through a connecting member such as a screw.

[0061] In one of the embodiments, the bottom of the fixing seat 112 is provided with a limiting hole, and the top of the base 111 is provided with a limiting column matched with the limiting hole, the limiting column is protrudingly arranged in the limiting hole to realize the connection and fixation of the two. In the embodiment, the fixing seat 112 and the base 111 can also be fixed through a connecting member such as a screw or a buckle, and the adjustment can be made according to the specific use requirements.

[0062] In the embodiment, the force applying assembly 30 is movably connected with the end of the upper connecting rod 22 away from the connecting rod support sleeve 21 through a connecting member such as a thread, a buckle, or a screw. In the embodiment, the force applying assembly 30 can be pressed down by manual pressing, cylinder driving, or hydraulic driving, so as to drive the connecting rod assembly 20 and the pressure head 25 to maintain the pressure of the product to be pressed 13.

[0063] In combination with the Figure 1 illustrated, Figure 1 is a structural schematic view of a pressure maintaining device provided in an embodiment of the application. In some embodiments, the connecting rod support sleeve 21 is a cylindrical structure, which is vertically arranged in the support seat 121 and movably connected with the support seat 121 through a bolt or a thread. The connecting rod support sleeve 21 is internally provided with a through channel, which provides installation space and support and guiding for the lower connecting rod 24.

[0064] In one embodiment, the lower link 24 is a vertical rod structure, which is installed in the through channel, and the bottom end of the lower link 24 is connected with the pressure head 25 through screw connection or buckle connection. The top end of the lower link 24 is connected with the bottom end of the middle link 23 through a movable connecting member such as a pin shaft and a hinge.

[0065] In one embodiment, the upper link 22 is arranged in an L-shaped structure through bending, and one end of the upper link 22 close to the link support sleeve 21 is movably connected with the side wall of the link support sleeve 21 through a movable connecting member such as a pin shaft or a hinge. The other end of the upper link 22 away from the link support sleeve 21 is movably connected with the force applying assembly 30 through a movable connecting member such as a bolt or a buckle. By adjusting the connecting points of the two, the pressure maintaining force can be adjusted.

[0066] In one embodiment, the middle link 23 is an inclined straight rod structure, and the top end of the middle link 23 is movably connected with the bending part of the upper link 22 through a movable connecting member such as a pin shaft or a hinge, so as to optimize the force transmission path and reduce the lateral component force in the movement. In this embodiment, the inclination angle of the middle link 23 is an acute angle, and the length of the middle link 23 is less than the lengths of the upper link 22 and the lower link 24.

[0067] In the specific implementation process, the force applying assembly 30 is pressed downward to drive the upper link 22 to move. Since one end of the upper link 22 is connected with the link support sleeve 21, and the bending part of the upper link 22 is connected with the top end of the middle link 23, the upper link 22 generates a lever swing effect, which is transmitted to the lower link 24 through the middle link 23 to drive the pressure head 25 to move in the vertical direction.

[0068] In this embodiment, if it is necessary to adjust the pressure maintaining force, the following methods can be used: adjusting the vertical position of the link support sleeve 21 in the support seat 121 to change the angle between the upper link 22, the middle link 23 and the lower link 24, so as to adjust the pressure maintaining force. Alternatively, the connecting point between the upper link 22 and the force applying assembly 30 is adjusted to change the distance between the force applying assembly 30 and the bending part of the upper link 22, so as to adjust the pressure maintaining force.

[0069] In combination with Figure 2 the above description, Figure 2 is a structural schematic view of the first platform part 11 provided in one embodiment of the present application. In some embodiments, the upper link 22 includes a long diameter section 221 and a short diameter section 222 connected with each other, and the long diameter section 221 and the short diameter section 222 have an included angle to form a bent L-shaped structure. One end of the long diameter section 221 is movably connected with the force applying assembly 30 through a bolt or a bayonet, and one end of the short diameter section 222 is movably connected with the side wall of the link support sleeve 21 through a pin shaft or a hinge. In this embodiment, the included angle between the long diameter section 221 and the short diameter section 222 is 90°.

[0070] In combination with Figure 5 the above description,Figure 6 As shown, Figure 5 FIG. 1 is a structural schematic diagram of a force applying assembly 30 provided in an embodiment of the present application. Figure 6 FIG. 2 is a structural schematic diagram of a weight 31 provided in an embodiment of the present application.

[0071] In some embodiments, the force applying assembly 30 comprises a weight 31, the bottom of the weight 31 is provided with a mounting groove 32, and a mounting hole 33 is arranged in the mounting groove 32. The long diameter section 221 is arranged in the mounting groove 32, and a movable hole 223 is arranged on the long diameter section 221 at a position corresponding to the mounting hole 33. A bolt passes through the movable hole 223 and the mounting hole 33 to fix and mount the long diameter section 221 of the upper connecting rod 22 on the weight 31. In the embodiment, the long diameter section 221 and the mounting groove 32 can also be connected through a buckle or other movable connecting member.

[0072] In one of the embodiments, the length of the movable hole 223 is greater than the length of the mounting hole 33, so that the long diameter section 221 moves in a certain direction in the mounting groove 32. By adjusting the connecting position of the long diameter section 221 in the mounting groove 32 of the weight 31, the size of the pressure maintaining force can be adjusted.

[0073] In the specific implementation process, the pressure head 25 contacts the product 13 to be pressed under the gravity of the weight 31, so as to realize the pressure maintaining treatment. If it is necessary to adjust the size of the pressure maintaining force, the following methods can be used: since the upper connecting rod 22 and the connecting rod supporting sleeve 21 adopt the lever swing mode, the position of the long diameter section 221 of the upper connecting rod 22 in the mounting groove 32 is adjusted to adjust the size of the pressure maintaining force. Alternatively, the vertical position of the connecting rod supporting sleeve 21 in the supporting seat 121 is adjusted to change the stress point of the lever swing, so as to adjust the size of the pressure maintaining force.

[0074] In one of the embodiments, the connecting rod supporting sleeve 21 is vertically arranged in the supporting seat 121, one side of the supporting seat 121 is provided with a threaded hole 122 extending along the width direction of the supporting seat 121. A fastening bolt is arranged in the threaded hole 122 and abuts against the connecting rod supporting sleeve 21. By rotating the fastening bolt, the abutting clamping or loosening of the fastening bolt to the connecting rod supporting sleeve 21 is realized, so as to adjust the vertical position of the connecting rod supporting sleeve 21 in the supporting seat 121, and to adjust the size of the pressure maintaining force.

[0075] In one of the embodiments, the outer wall of the connecting rod supporting sleeve 21 is provided with external threads, and the supporting seat 121 is provided with internal threads engaged with the external threads. By rotating the connecting rod supporting sleeve 21, the connecting rod supporting sleeve 21 is rotated upward or downward to adjust the vertical position of the connecting rod supporting sleeve 21 in the supporting seat 121, so as to adjust the size of the pressure maintaining force.

[0076] In combination with Figure 3 , Figure 4 As shown, Figure 3A size marking diagram of the pressure maintaining device provided in an embodiment of the present application. Figure 4 A size marking diagram of the pressure maintaining device provided in an embodiment of the present application. In some embodiments, the weight 31 rotates in a vertical plane; the center of gravity of the weight 31 is P1, and the weight of the weight 31 can be adjusted as needed to change the initial pressure applied to the device.

[0077] In one of the embodiments, the connection point of the short diameter section 222 of the upper link 22 and the sidewall of the link support sleeve 21 is P2. The connection point of the bending part between the short diameter section 222 and the long diameter section 221 of the upper link 22 and the middle link 23 is P3, which uses the principle of lever and the gravity of the weight 31 to convert the gravity of the weight 31 into pressure on the middle link 23. The connection point of the middle link 23 and the lower link 24 is P4, which transmits the pressure to the lower link 24 and the pressure head 25.

[0078] In one of the embodiments, the gravity of the weight 31 is F1. The vertical downward component of the pressure of the weight 31 and the upper link 22 on the middle link 23 is F2. Due to the bending design of the upper link 22, F2 is converted from F1 through the principle of lever. The vertical downward component of the pressure of the middle link 23 on the lower link 24 and the pressure head 25 is F3. Similarly, F3 is transmitted from F2 through the middle link 23.

[0079] Specifically, when the product 13 is subjected to a pressure F, according to the principle of lever and the principle of force balance, the F, F2, and F3 satisfy the relationship F=F2=F3. By adjusting the mass m of the weight 31 to change the size of F1, and then adjusting the size of F2 and F3 through the link assembly 20, the accurate control of the pressure F on the product 13 is finally realized.

[0080] In one of the embodiments, the horizontal distance from the center of gravity P1 of the weight 31 to the connection point P2 of the short diameter section 222 and the link support sleeve 21 is D1, the horizontal distance from the connection point P2 of the short diameter section 222 and the link support sleeve 21 to the connection point P3 of the bending part of the upper link 22 and the middle link 23 is D2, and the horizontal distance from the center of gravity P1 of the weight 31 to the connection point P3 of the bending part of the upper link 22 and the middle link 23 is D3.

[0081] In one of the embodiments, the included angle between the P2-P3 line and the P2-P4 line is R1. The included angle between the P2-P4 line and the P3-P4 line is R2. The included angle between the P2-P3 line and the P1-P3 line is 90°.

[0082] In one of the embodiments, the angle between the central axis of the weight 31 and the horizontal plane on which the weight 31 is located is R3, and the angle between the long diameter section 221 and the short diameter section 222 of the upper connecting rod 22 is 90°. The R1 and R3 satisfy the relationship R1=R3, which ensures that the vertical component force generated by the weight 31 can act on the middle connecting rod 23 and the lower connecting rod 24.

[0083] In one of the embodiments, the force applied at the P1 point is F1, and the force arm is D1; the vertical downward component force at the P2 point is F2, and the force arm is D2. According to the force balance principle, the F1, F2, D1, and D2 satisfy the relationship D1*F1=D2*F2. When the R3, D2, and F1 remain unchanged, the F2 can be changed by adjusting the D1. Specifically, when the D1 increases, the F2 also increases to maintain the force balance; conversely, when the D1 decreases, the F2 decreases.

[0084] As described above, when the pressure maintaining force is adjusted in a small range, the D1 is increased or decreased by loosening the bolt between the mounting groove 32 of the weight 31 and the long diameter section 221 of the upper connecting rod 22, so as to change the force F of the product 13, i.e., the pressure maintaining force.

[0085] In one of the embodiments, the vertical distance from the upper surface of the base 111 to the upper surface of the product 13 is H1. The product 13 is located below the support seat 121, and the vertical distance from the upper surface of the product 13 to the lower surface of the support seat 121 is H2. The vertical distance from the lower surface of the support seat 121 to the P2 is H3. The vertical distance from the upper surface of the product 13 to the P4 is H4, the vertical distance from the P4 to the P2 is H5, the vertical distance from the upper surface of the product 13 to the P2 is H6, and the vertical distance from the P4 to the P3 is H7. In this embodiment, the H2, H3, and H6 satisfy the relationship H6=H2+H3. The H4, H5, and H6 satisfy the relationship H6=H4+H5. Among them, the H2 and H4 are constant values, the H5 changes, and the H3 also changes.

[0086] In one of the embodiments, the distance between the P2 and the P3 is L1, the distance between the P3 and the P4 is L2, and the distance between the P1 and the P2 is L3. Among them, the line connecting the P2, P3, and P4 forms a triangle, the line connecting the P2 and the P4 is one of the sides, and the H5 is the length of this side. According to the trigonometric function theorem, when the L1 and L2 remain unchanged, the relative position relationship among the P2, P3, and P4 can be changed by adjusting the size of the H5, i.e., the angle R1 between the line connecting the P2 and the P3 and the line connecting the P2 and the P4, and the angle R2 between the line connecting the P2 and the P4 and the line connecting the P3 and the P4 change accordingly. Specifically, when the H5 increases, the R1 and R2 decrease, and the R3 also decreases. Conversely, when the H5 decreases, the R1 and R2 increase, and the R3 increases.

[0087] In one embodiment, according to the cosine theorem, the D1, L3, R3 satisfy the relationship: D1=L3*COSR3. According to the sine theorem, the D2, L1, R1 satisfy the relationship: D2=L1*SINR1. According to the force balance principle, D1*F1=D2*F2. Wherein, R1=R3, F=F2=F3. The F1, F2, L1, L3, R1, R3 satisfy the relationship: F2= (L3*COSR1*F1) / (L1*SINR1). That is, the F, F1, L1, L3, R1 satisfy the relationship: F= (L3*COSR1*F1) / (L1*SINR1). When L1, L2, F1, L3 are kept unchanged, H3 or H5 is changed, that is, R3 or R1 is changed, F is changed accordingly. Specifically, when H3 or H5 increases, R1 or R3 decreases, and F increases. Conversely, when H3 or H5 decreases, R1 or R3 increases, and F decreases.

[0088] In this embodiment, when R1 approaches 90°, F approaches 0. When R1 approaches 0°, F is infinite.

[0089] As described above, when the size of the pressure maintaining force is adjusted in a large range, the bolt between the loose support seat 121 and the connecting rod support sleeve 21 is loosened, the vertical position of the connecting rod support sleeve 21 is adjusted, that is, the size of H5 or H3 is adjusted, and the size of the pressure maintaining force F borne by the product 13 is changed.

[0090] In combination with FIGS. 1-5, Figure 7 , Figure 8 As shown, Figure 7 is a front view schematic diagram of different adjustment states provided in an embodiment of the present application. Figure 8 is a top view schematic diagram of different adjustment states provided in an embodiment of the present application. Wherein, the first pressure maintaining device 110, that is, the state of D1 not being adjusted and H3 or H5 not being adjusted, is included. The second pressure maintaining device 120, that is, the state of D1 being adjusted to move 2mm and H3 or H5 not being adjusted, is included. The third pressure maintaining device 130, that is, the state of D1 being adjusted to move 4mm and H3 or H5 not being adjusted, is included. The fourth pressure maintaining device 140, that is, the state of D1 not being adjusted and H3 or H5 being adjusted by 2mm, is included. The fifth pressure maintaining device 150, that is, the state of D1 not being adjusted and H3 or H5 being adjusted by 4mm, is included.

[0091] The technical features of the above-described embodiments can be combined in any manner. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0092] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A pressure-adjustable pressure-maintaining device, characterized by The utility model provides a kind of support (10), including first platform part (11) and second platform part (12), the first platform part (11) is used to place product (13), the second platform part (12) is set in the first platform part (11) above in vertical direction; Connecting rod assembly (20) is installed in the second platform part (12), including connecting rod support sleeve (21), upper connecting rod (22), middle connecting rod (23) and lower connecting rod (24), the connecting rod support sleeve (21) is fixedly arranged in the second platform part (12);Lower connecting rod (24) is vertically installed in the connecting rod support sleeve (21), moves along its axial direction, one end of lower connecting rod (24) is connected with pressure head (25) and is stretched out from the connecting rod support sleeve (21), the other end of lower connecting rod (24) is movably connected with one end of middle connecting rod (23);Middle connecting rod (23) is partially located in the connecting rod support sleeve (21), and the other end of middle connecting rod (23) is movably connected with upper connecting rod (22);One end of upper connecting rod (22) is movably arranged on the connecting rod support sleeve (21); Force application assembly (30) is arranged on one side of connecting rod assembly (20), and the other end of upper connecting rod (22) is movably connected with force application assembly (30). The upper connecting rod (22) is bently arranged, one end of which is movably connected with the connecting rod support sleeve (21);The middle connecting rod (23) is obliquely arranged, and the top end of the middle connecting rod (23) is movably connected with the bent portion of the upper connecting rod (22);The top end of the lower connecting rod (24) is movably connected with the bottom end of the middle connecting rod (23), and the bottom end of the lower connecting rod (24) is connected with the pressure head (25) and is stretched out from the connecting rod support sleeve (21).

2. The pressure-maintaining device of claim 1, wherein The upper connecting rod (22) includes a long diameter section (221) and a short diameter section (222) connected with each other, and an included angle is formed between the long diameter section (221) and the short diameter section (222).

3. The pressure-maintaining device of claim 2, wherein The force application assembly (30) includes a weight (31), the bottom of the weight (31) is provided with a mounting groove (32), and a mounting hole (33) is arranged in the mounting groove (32);The long diameter section (221) is arranged in the mounting groove (32), and a movable hole (223) is arranged on the long diameter section (221) at a position corresponding to the mounting hole (33), the length of the movable hole (223) is greater than the length of the mounting hole (33), and a bolt is fixedly arranged in the movable hole (223) and the mounting hole (33).

4. The pressure-maintaining device of claim 3, wherein The second platform part (12) is a support seat (121), which is transversely arranged on the support (10), the connecting rod support sleeve (21) is arranged through the support seat (121), and a threaded hole (122) is arranged on one side of the support seat (121), and a fastening bolt is arranged in the threaded hole (122) and abuts against the connecting rod support sleeve (21).

5. The pressure-maintaining device of claim 4, wherein ​ 6. The pressure-maintaining device of claim 5, wherein The weight (31) rotates in a vertical plane; a gravity center point of the weight (31) is P1, a connecting point of the short diameter section (222) and the connecting rod support sleeve (21) is P2, a connecting point of the upper connecting rod (22) bending part and the middle connecting rod (23) is P3, and a connecting point of the middle connecting rod (23) and the lower connecting rod (24) is P4; A horizontal distance from P1 to P2 is D1, a horizontal distance from P2 to P3 is D2, and a horizontal distance from P1 to P3 is D3; When the gravity of the weight (31) is F1, a vertical downward component of the pressure of the weight (31) and the upper connecting rod (22) on the middle connecting rod (23) is F2, and a vertical downward component of the pressure of the middle connecting rod (23) on the lower connecting rod (24) and the pressure head (25) is F3; the product (13) bears a pressure F; wherein F, F2 and F3 satisfy the relationship F=F2=F3.

7. The pressure-maintaining device of claim 6, wherein An included angle between the P2, P3 line and the P2, P4 line is R1, an included angle between the P2, P4 line and the P3, P4 line is R2, and an included angle between the middle axis of the weight (31) and the horizontal plane where the weight (31) is located is R3; when the included angle between the P2, P3 line and the P1, P3 line is 90°, R1 and R3 satisfy the relationship R1=R3, and F1, F2, D1 and D2 satisfy the relationship D1*F1=D2*F2.

8. The pressure-maintaining device of claim 7, wherein A vertical distance from the upper surface of the first platform part (11) to the upper surface of the product (13) is H1, a vertical distance from the upper surface of the product (13) to the lower surface of the support seat (121) is H2, a vertical distance from the lower surface of the support seat (121) to P2 is H3, a vertical distance from the upper surface of the product (13) to P4 is H4, a vertical distance from P4 to P2 is H5, and a vertical distance from the upper surface of the product (13) to P2 is H6, and a vertical distance from P4 to P3 is H7; When the distance from P2 to P3 is L1, the distance from P3 to P4 is L2, and the distance from P1 to P2 is L3, H2, H3 and H6 satisfy the relationship H6=H2+H3, and H4, H5 and H6 satisfy the relationship H6=H4+H5.

9. The pressure-maintaining device of claim 8, wherein D1, L3 and R3 satisfy the relationship D1=L3*COSR3; D2, L1 and R1 satisfy the relationship D2=L1*SINR1; F1, F2, L1, L3, R1 and R3 satisfy the relationship F2=(L3*COSR1*F1) / (L1*SINR1); and F, F1, L1, L3 and R1 satisfy the relationship F=(L3*COSR1*F1) / (L1*SINR1).

10. The pressure-maintaining device of any one of claims 1-5, wherein, The first platform part (11) comprises a base (111) and a fixing base (112), the base (111) is transversely arranged on one side of the support (10), the fixing base (112) is provided with a recess (113) for placing the product (13) on the top, the bottom of the fixing base (112) is provided with a limiting hole, and the top of the base (111) is provided with a limiting column matched with the limiting hole.

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