Precise pressure adjusting mechanism

Abstract

The utility model aims to provide the precise pressure regulating mechanism which is compact in structure, can be used for regulating and accurately regulating and controlling the pressure through the screw rod nut, can be used for quickly and steplessly regulating the pressure, can counteract the interference of the gravity of a part on the pressure of a product, and can truly reflect the pressure. The pressure fine adjustment device comprises a pressing module, a pressure fine adjustment module and a carrier plate module, the pressure fine adjustment module is arranged at the action end of the pressing module, the carrier plate module is arranged below the pressure fine adjustment module, the pressure fine adjustment module comprises a lifting frame, a transmission frame, a T-shaped lead screw and a T-shaped nut, the top of the T-shaped lead screw is connected with a top plate of the lifting frame, and the T-shaped nut is connected with the transmission frame. An inverted T-shaped nut is in threaded fit with the T-shaped lead screw, a force adjusting spring is arranged between a top plate of the transmission frame and the T-shaped nut, the transmission frame vertically slides on a bottom plate of the lifting frame, a pressure sensor is arranged at the bottom of the transmission frame, and a pressing head is arranged at the lower end of the pressure sensor. The mechanical pressure testing device is applied to the technical field of mechanical pressure testing.

Description

Technical Field

[0001] The utility model is applied to the technical field of mechanical pressure testing, and particularly relates to a precision pressure regulating mechanism. Background Art

[0002] With the development of science and technology, electronic products such as smart watches, tablet computers, Bluetooth headsets, and smart phones have gradually entered people's lives. In order to ensure the quality of electronic products, it is usually necessary to perform pressure tests on the buttons, touch screens and other pressure control components on electronic products before they leave the factory, so as to determine the pressure resistance of the components during use to ensure their safety. At present, there are generally two testing methods for pressure testing: manual testing and cylinder drive; the pressure test of parts is done manually by operators, which is not only inefficient but also labor-intensive. If a cylinder is used to drive the pressure sensor to press the test part, the pressure sensor is in motion during the above conventional pressure test process, and the pressure sensor will have reading drift, and the pressure test accuracy is low. For example, a Chinese patent with publication number CN110326847A discloses a pressure tester, which presses the upper and lower clamps together by the rapid downward movement of the telescopic rod of the telescopic cylinder. When the standard pressure sensor detects that the pressure applied by the telescopic cylinder reaches the set value, the telescopic cylinder is deflated and the telescopic rod of the telescopic cylinder retracts upward. The value recorded by the thin film pressure sensor reflects the buffering performance of the product. However, the impact force of the cylinder is strong, and it is difficult to accurately control the driving stroke, which can easily cause structural damage to the product. Therefore, it is necessary to provide a precise pressure regulating mechanism that can adjust through a screw nut, accurately control the pressure, can quickly and steplessly adjust the pressure, can offset the interference of the parts' own gravity on the product pressure, and truly reflect the pressure. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a precise pressure regulating mechanism which has a compact structure, can be adjusted through a screw nut, can accurately control pressure, can quickly and steplessly regulate pressure, can offset the interference of the parts' own gravity on product pressure, and can truly reflect pressure.

[0004] The technical solution adopted by the utility model is: the utility model includes a pressing module, a pressure fine-adjusting module and a carrier module, the pressure fine-adjusting module is arranged at the action end of the pressing module, the carrier module is arranged below the pressure fine-adjusting module, the pressure fine-adjusting module includes a lifting frame, a transmission frame, a T-shaped screw rod and a T-shaped nut, the top of the T-shaped screw rod is connected to the top plate of the lifting frame, the inverted T-shaped nut is threadedly matched with the T-shaped screw rod, a force adjustment spring is arranged between the top plate of the transmission frame and the T-shaped nut, the transmission frame slides up and down on the bottom plate of the lifting frame, a pressure sensor is arranged at the bottom of the transmission frame, a pressure head is arranged at the lower end of the pressure sensor, and the pressure head is pressed and matched with the product of the carrier module.

[0005] It can be seen from the above scheme that the present application utilizes a precision screw nut structure to adjust the spring compression amount, which can accurately control the pressure and perform manual fine-tuning according to actual needs, effectively replacing the drive of the cylinder and avoiding the strong impact force that makes it difficult to accurately control the drive stroke, thereby causing structural damage to the product.

[0006] A preferred solution is that the pressure fine-tuning module also includes a tension spring and a clip, the bottom plate of the lifting frame is provided with four groups of linear bearings, the transmission frame includes a fixed block, a mounting block and four guide shafts, the fixed block is connected to the force adjustment spring, the guide shaft is slidingly matched with the linear bearing, the pressure sensor is arranged at the bottom of the mounting block, the clip is arranged on the top plate of the lifting frame and the mounting block, the upper end of the tension spring is connected to the clip of the lifting frame, and the lower end of the tension spring is connected to the clip of the mounting block.

[0007] A preferred solution is that a positioning pin is provided at the bottom of the lifting frame, and the positioning pin is positioned and matched with the carrier module.

[0008] A preferred solution is that the action end of the pressing die set is connected to the top plate of the transmission frame by means of equal height screws, and a compression spring is provided between the action end of the pressing die set and the top plate of the transmission frame.

[0009] A preferred solution is that the pressing die set includes a vertical plate and a quick clamp rotating in the vertical direction, the vertical plate is provided with a vertical linear guide rail, the quick clamp is arranged on the top of the linear guide rail, the linear guide rail is slidingly provided with a slider, the movable end of the quick clamp is connected to the slider, the bottom of the slider is connected to a connecting block, and the connecting block is connected to the top plate of the transmission frame through the equal height screws.

[0010] A preferred solution is that the bottom of the vertical plate is connected to the carrier module, a buffer block is provided at the side end of the vertical plate, a buffer is provided at the side end of the slider, and the buffer is press-fitted with the buffer block.

[0011] A preferred solution is that the carrier module includes a base, the bottom of the base is provided with four symmetrically arranged foot pads, the base is provided with a contoured groove adapted to the product, the base is provided with a guide sleeve, and the guide sleeve is positioned and matched with the positioning pin.

[0012] A preferred solution is that the pressure fine-tuning module also includes a hexagonal anti-loosening nut, the hexagonal anti-loosening nut cooperates with the T-type screw thread, and the hexagonal anti-loosening nut is arranged at the upper end of the T-type nut.

[0013] A preferred solution is that the lifting frame includes a mounting plate, a support column and a fixing plate which are sequentially connected from top to bottom, the mounting plate serves as a top plate of the transmission frame, and the fixing plate serves as a bottom plate of the transmission frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0015] Figure 2 is a three-dimensional structural diagram of the pressing die set;

[0016] Figure 3 is a three-dimensional structural exploded view of the pressure fine adjustment module;

[0017] Figure 4 It is a three-dimensional structural exploded diagram of the carrier module. DETAILED DESCRIPTION

[0018] like Figures 1 to 4 As shown, in this embodiment, the utility model includes a pressing module 1, a pressure fine-adjusting module 2 and a carrier module 3, the pressure fine-adjusting module 2 is arranged at the action end of the pressing module 1, and the carrier module 3 is arranged below the pressure fine-adjusting module 2, the pressure fine-adjusting module 2 includes a lifting frame, a transmission frame, a T-screw 23, and a T-nut 24, the top of the T-screw 23 is connected to the top plate of the lifting frame, the inverted T-nut 24 is threadedly matched with the T-screw 23, a force adjusting spring 25 is arranged between the top plate of the transmission frame and the T-nut 24, the transmission frame slides up and down on the bottom plate of the lifting frame, a pressure sensor 26 is arranged at the bottom of the transmission frame, and a pressure head 27 is arranged at the lower end of the pressure sensor 26, and the pressure head 27 is pressed against the product of the carrier module 3.

[0019] The pressing module 1 is used for lifting and pressing down the pressure fine-tuning module 2, and serves as the power source for the lifting and lowering of the pressure fine-tuning module 2. The pressure fine-tuning module 2 is used to accurately adjust the pressure of the product; the carrier module 3 is used to position the product; the present application adopts a screw nut adjustment mechanism, which can quickly and steplessly adjust the pressure; the spring compression amount is adjusted by the precision screw nut structure, and the pressure can be accurately controlled. The pressing module 1 is manually pressed down, and the pressure fine-tuning module 2 performs initial positioning on the product, and the T-nut 24 is rotated to adjust the T-nut 24. The T-nut 24 moves vertically downward along the T-screw 23, and the force adjustment spring 25 drives the transmission frame to move downward. The pressure head 27 presses the product, and the pressure sensor 26 is used to detect the pressure of the pressure head 27, and the pressure of the force adjustment spring is transmitted to the product through the pressure sensor.

[0020] like Figure 3 As shown, in this embodiment, the pressure fine adjustment module 2 also includes a tension spring 28 and a buckle 29, the bottom plate of the lifting frame is provided with four groups of linear bearings 201, the transmission frame includes a fixed block 221, a mounting block 222 and four guide shafts 223, the fixed block 221 is connected to the force adjustment spring 25, the guide shaft 223 is slidably matched with the linear bearing 201, the pressure sensor 26 is arranged at the bottom of the mounting block 222, the buckle 29 is arranged on the top plate of the lifting frame and the mounting block 222, the upper end of the tension spring 28 is connected to the buckle of the lifting frame, and the lower end of the tension spring 28 is connected to the buckle of the mounting block 222. The tension of the tension spring 28 can offset the interference of the self-gravity of the parts on the product pressure, ensuring that the verticality of the pressure sensor 26 is the real pressure acting on the product.

[0021] like Figure 3 As shown, in this embodiment, a positioning pin 202 is provided at the bottom of the lifting frame, and the positioning pin 202 is positioned and matched with the carrier module 3 to ensure that the lifting frame is accurately inserted into the carrier module 3.

[0022] like Figure 3 As shown, in this embodiment, the action end of the pressing die set 1 is connected to the top plate of the transmission frame by an equal height screw 203, and a compression spring 204 is arranged between the action end of the pressing die set 1 and the top plate of the transmission frame. The floating structure is adopted to avoid the pressing die set 1 from being pressed down hard, which may cause structural damage to the pressure fine adjustment die set 2.

[0023] like Figure 2As shown, in this embodiment, the pressing die set 1 includes a vertical plate 11 and a quick clamp 12 that rotates in the vertical direction. The vertical plate 11 is provided with a vertical linear guide 13. The quick clamp 12 is provided at the top of the linear guide 13. The linear guide 13 is slidably provided with a slider 14. The movable end of the quick clamp 12 is connected to the slider 14. The bottom of the slider 14 is connected with a connecting block 15. The connecting block 15 is connected to the top plate of the transmission frame through the equal height screw 203. The linear guide 13 provides guide support for the lifting and lowering of the slider 14. The quick clamp 12 serves as a power source for the slider 14. Pressing down the quick clamp 12 drives the slider 14 to move downward, and pushing up the quick clamp 12 drives the slider 14 to move upward.

[0024] like Figure 2 As shown, in this embodiment, the bottom of the vertical plate 11 is connected to the carrier module 3, the side end of the vertical plate 11 is provided with a buffer block 16, and the side end of the slider 14 is provided with a buffer 17, and the buffer 17 is pressed together with the buffer block 16 to limit the descending stroke of the slider 14 and avoid the pressure fine-tuning module 2 from being over-pressed.

[0025] like Figure 4 As shown, in this embodiment, the carrier module 3 includes a base 31, and four symmetrically arranged foot pads 32 are arranged at the bottom of the base 31. The base 31 is provided with a contoured groove 33 adapted to the product, and the base 31 is provided with a guide sleeve 34. The guide sleeve 34 is positioned and matched with the positioning pin 202 to play a guiding and positioning role.

[0026] like Figure 3 As shown, in this embodiment, the pressure fine adjustment module 2 further includes a hexagonal locking nut 205, which is threadedly matched with the T-shaped screw rod 23 and is arranged at the upper end of the T-shaped nut 24. The T-shaped nut 24 is rotated to adjust the pressure, and then the hexagonal locking nut 205 is locked to prevent the T-shaped nut 24 from shifting.

[0027] like Figure 3 As shown, in this embodiment, the lifting frame includes a mounting plate 206, a support column 207 and a fixing plate 208 which are sequentially connected from top to bottom. The mounting plate 206 serves as the top plate of the transmission frame, the fixing plate 208 serves as the bottom plate of the transmission frame, and the support column 207 serves as a supporting connection.

Claims

1. A precision pressure regulating mechanism, characterized in that: It comprises a pressing module (1), a pressure fine-adjusting module (2) and a carrier module (3); the pressure fine-adjusting module (2) is arranged at the action end of the pressing module (1); the carrier module (3) is arranged below the pressure fine-adjusting module (2); the pressure fine-adjusting module (2) comprises a lifting frame, a transmission frame, a T-shaped screw rod (23) and a T-shaped nut (24); the top of the T-shaped screw rod (23) is connected to the top plate of the lifting frame; the inverted T-shaped nut (24) is threadedly matched with the T-shaped screw rod (23); a force adjustment spring (25) is arranged between the top plate of the transmission frame and the T-shaped nut (24); the transmission frame slides up and down on the bottom plate of the lifting frame; a pressure sensor (26) is arranged at the bottom of the transmission frame; a pressure head (27) is arranged at the lower end of the pressure sensor (26); the pressure head (27) is pressed against the product top of the carrier module (3).

2. A precision pressure regulating mechanism according to claim 1, characterized in that: The pressure fine-tuning module (2) further comprises a tension spring (28) and a buckle (29); the bottom plate of the lifting frame is provided with four groups of linear bearings (201); the transmission frame comprises a fixed block (221), a mounting block (222) and four guide shafts (223); the fixed block (221) is connected to the force adjustment spring (25); the guide shaft (223) is slidably matched with the linear bearing (201); the pressure sensor (26) is arranged at the bottom of the mounting block (222); the buckle (29) is arranged on the top plate of the lifting frame and the mounting block (222); the upper end of the tension spring (28) is connected to the buckle of the lifting frame; and the lower end of the tension spring (28) is connected to the buckle of the mounting block (222).

3. A precision pressure regulating mechanism according to claim 1, characterized in that: A positioning pin (202) is provided at the bottom of the lifting frame, and the positioning pin (202) is positioned and matched with the carrier module (3).

4. A precision pressure regulating mechanism according to claim 1, characterized in that: The action end of the pressing die set (1) is connected to the top plate of the transmission frame via an equal height screw (203), and a compression spring (204) is provided between the action end of the pressing die set (1) and the top plate of the transmission frame.

5. A precision pressure regulating mechanism according to claim 4, characterized in that: The pressing die set (1) comprises a vertical plate (11) and a quick clamp (12) that rotates in a vertical direction; the vertical plate (11) is provided with a vertical linear guide rail (13); the quick clamp (12) is arranged on the top of the linear guide rail (13); the linear guide rail (13) is slidably provided with a slider (14); the movable end of the quick clamp (12) is connected to the slider (14); the bottom of the slider (14) is connected to a connecting block (15); the connecting block (15) is connected to the top plate of the transmission frame via the equal height screws (203).

6. A precision pressure regulating mechanism according to claim 5, characterized in that: The bottom of the vertical plate (11) is connected to the carrier module (3), a buffer block (16) is provided at the side end of the vertical plate (11), a buffer (17) is provided at the side end of the sliding block (14), and the buffer (17) is press-fitted with the buffer block (16).

7. A precision pressure regulating mechanism according to claim 3, characterized in that: The carrier module (3) comprises a base (31), the bottom of the base (31) is provided with four symmetrically arranged foot pads (32), the base (31) is provided with a contoured groove (33) adapted to the product, the base (31) is provided with a guide sleeve (34), and the guide sleeve (34) is positioned and matched with the positioning pin (202).

8. A precision pressure regulating mechanism according to claim 3, characterized in that: The pressure fine-tuning module (2) further comprises a hexagonal anti-loosening nut (205), wherein the hexagonal anti-loosening nut (205) is threadably matched with the T-shaped screw rod (23), and the hexagonal anti-loosening nut (205) is arranged on the upper end of the T-shaped nut (24).

9. A precision pressure regulating mechanism according to claim 3, characterized in that: The lifting frame comprises a mounting plate (206), a support column (207), and a fixing plate (208) which are connected in sequence from top to bottom; the mounting plate (206) serves as a top plate of the transmission frame, and the fixing plate (208) serves as a bottom plate of the transmission frame.

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