Press fitting mechanism and press fitting device

Abstract

The utility model belongs to the technical field of press-fitting, and discloses a press-fitting mechanism and a press-fitting device.The press-fitting mechanism comprises a load tool and a driving part, the load tool comprises a pressing head, a pressure sensor, a first protection assembly and a second protection assembly, and the first protection assembly comprises a limiting plate, a mounting frame, a first guide column, a limiting blocking piece and a first elastic part; the mounting frame is connected with the limiting plate, the first guide column is slidably connected to the mounting frame in the vertical direction, the first end of the first guide column is located between the limiting plate and the mounting frame and provided with a limiting blocking piece, the first elastic piece is arranged between the limiting blocking piece and the mounting frame, and the limiting plate can abut against the limiting blocking piece. The second end of the first guide column penetrates through the mounting frame to be connected with the pressing head. The second protection assembly comprises a second elastic piece, and the second elastic piece is located between the pressure sensor and the mounting frame, so that the detection end of the pressure sensor abuts against the pressure head; the output end of the driving part is in transmission connection with the limiting plate so as to drive the load tool to apply pressure to the workpiece.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of press fitting, especially to a press fitting mechanism and press fitting device. BACKGROUND

[0002] In the press fitting process, for the application needing to monitor the pressure, a pressure / tension pressure sensor is often used for monitoring to ensure the accuracy and reliability of the press fitting process. Although most pressure sensors are designed with certain overload protection mechanism or safety margin, which can withstand a certain pressure without immediate failure in the case of temporary exceeding the range, long-term or frequent overload will still cause the elastic element inside the sensor to fatigue due to excessive deformation, and even break, causing irreversible damage to the sensor. And the circuit board may also be damaged due to excessive pressure, resulting in a decline in the performance of the sensor, and even complete failure. Such damage not only affects the accuracy and reliability of the press fitting process, but also may have a serious impact on the normal operation of the production line.

[0003] Therefore, it is urgent to provide a press fitting mechanism and press fitting device to solve the above problems. SUMMARY

[0004] The utility model aims at providing a press fitting mechanism and press fitting device to protect the pressure sensor from being damaged by exceeding the range, improve the accuracy and reliability of the press fitting process, and ensure the normal operation of the production line.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A press fitting mechanism, comprising:

[0007] A load tool, comprising a pressure head, a pressure sensor, a first protection assembly and a second protection assembly, the first protection assembly comprising a limiting plate, a mounting bracket, a first guide column, a limiting baffle and a first elastic element, the mounting bracket being connected with the limiting plate, the first guide column being slidably connected to the mounting bracket in the vertical direction, the first end of the first guide column being located between the limiting plate and the mounting bracket, and the limiting baffle being provided thereon, the first elastic element being arranged between the limiting baffle and the mounting bracket to make the first guide column have a tendency to move upward, the limiting plate being capable of abutting against the limiting baffle to limit the maximum stroke of the first guide column moving upward in the vertical direction, the second end of the first guide column penetrating through the mounting bracket and being connected with the pressure head; the second protection assembly comprising a second elastic element, the pressure sensor being located between the pressure head and the mounting bracket, the second elastic element being located between the pressure sensor and the mounting bracket for abutting the detection end of the pressure sensor against the pressure head;

[0008] A driving member, an output end of the driving member is in transmission connection with the limiting plate, so as to drive the load tool to apply pressure to the workpiece through the limiting plate.

[0009] Further, the second protection assembly further comprises a second guide column and a anti-falling baffle, the second guide column is slidably connected to the mounting frame in the vertical direction, a first end of the second guide column is located between the limiting plate and the mounting frame, and the anti-falling baffle is arranged on the first end of the second guide column, the anti-falling baffle is used to limit the maximum stroke of the second guide column moving downward in the vertical direction, and a second end of the second guide column is connected with the pressure sensor through the mounting frame.

[0010] Further, the second guide column comprises a sliding part and a mounting part, the sliding part is slidably connected to the mounting frame, one end of the sliding part is connected with the anti-falling baffle, and the other end of the sliding part is connected with the mounting part, the mounting part is used to mount the pressure sensor, and the second elastic member is located between the mounting frame and the mounting part.

[0011] Further, the first protection assembly further comprises a first sleeve, the first sleeve is mounted on the mounting frame, and the first guide column is slidably connected to the first sleeve in the vertical direction; and / or,

[0012] The second protection assembly further comprises a second sleeve, the second sleeve is mounted on the mounting frame, and the sliding part is slidably connected to the second sleeve in the vertical direction.

[0013] Further, the first protection assembly comprises at least two first guide columns, and the at least two first guide columns are arranged at intervals along the length direction of the pressure head.

[0014] Further, the pressure assembly further comprises a rack and a guide assembly, the guide assembly comprises a sliding rail and a sliding block, the sliding rail is arranged on the rack and extends in the vertical direction, and the sliding block is arranged on the load tool and slidably connected to the sliding rail.

[0015] Further, the load tool further comprises a connecting member, the connecting member comprises a horizontal part and a vertical part connected at an angle, the horizontal part is used to connect with the limiting plate, the vertical part is used to connect with the output end of the driving member, and the sliding block is arranged on the vertical part.

[0016] Further, the pressure assembly further comprises a balancing member, the balancing member is used to apply a pulling force to the load tool, and the pulling force is used to offset the gravity of the load tool.

[0017] Further, the balancing member is a constant force magnetic spring.

[0018] The press-fitting device comprises a feeding and discharging assembly and the press-fitting mechanism as claimed in any one of the preceding claims, the feeding and discharging assembly is used to transport workpieces to be press-fitted to a press-fitting position of the press head and remove the workpieces after press-fitting.

[0019] The present application has the advantages that:

[0020] The utility model provides a kind of press-fitting mechanism and press-fitting device, including load tooling and driving part, load tooling includes press head, pressure sensor, first protection component and second protection component, first protection component includes limit plate, mounting bracket, first guide pillar, limit baffle and first elastic piece, mounting bracket is connected with limit plate, first guide pillar is slidably connected in vertical direction in mounting bracket, the first end of first guide pillar is between limit plate and mounting bracket, and limit baffle is equipped, first elastic piece is arranged between limit baffle and mounting bracket, to make first guide pillar have the tendency of upward movement, limit plate can be abutted with limit baffle, to limit the maximum stroke of first guide pillar upward movement in vertical direction, the second end of first guide pillar is connected with press head through mounting bracket;Second protection component includes second elastic piece, pressure sensor is between press head and mounting bracket, second elastic piece is between pressure sensor and mounting bracket, for making the detection end of pressure sensor and press head abut, the output end of driving part is drivingly connected with limit plate, to drive load tooling to workpiece by limit plate and apply pressure.In normal state, force in system reaches equilibrium state, and each elastic piece will not be further compressed or rebound;When abnormal state, second elastic piece is further compressed, pressure sensor moves upward, limit baffle moves upward until with limit plate contact, if force is further increased, the increased force acts between limit baffle and limit plate, and the pressure of pressure sensor remains unchanged, so as to protect pressure sensor from being damaged by overrange, improve the accuracy and reliability of press-fitting process, guarantee the normal operation of production line. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the structure schematic diagram of the press-fitting mechanism provided by the utility model;

[0022] Figure 2 It is the side view of the press-fitting mechanism provided by the utility model;

[0023] Figure 3 It is the structure schematic diagram of load tooling provided by the utility model.

[0024] In the drawings:

[0025] 1, pressure head; 2, pressure sensor; 3, first protection assembly; 31, limiting plate; 32, mounting frame; 33, first guide column; 34, limiting baffle; 35, first elastic piece; 36, first sleeve; 4, second protection assembly; 41, second elastic piece; 42, second guide column; 421, sliding part; 422, mounting part; 43, anti-dropping baffle; 44, second sleeve; 5, driving piece; 7, guide assembly; 71, sliding rail; 72, sliding block; 8, connecting piece; 81, horizontal part; 82, vertical part; 9, balancing piece. DETAILED DESCRIPTION

[0026] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.

[0027] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, 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 of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0028] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and 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" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0029] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0030] As Figures 1-3As shown, the embodiment provides a press-fitting mechanism, which comprises a load tool and a driving member 5, the load tool comprising a press head 1, a pressure sensor 2, a first protection assembly 3 and a second protection assembly 4, the first protection assembly 3 comprising a limiting plate 31, a mounting frame 32, a first guide column 33, a limiting baffle 34 and a first elastic member 35, the mounting frame 32 being connected with the limiting plate 31, the first guide column 33 being slidably connected with the mounting frame 32 in the vertical direction, a first end of the first guide column 33 being located between the limiting plate 31 and the mounting frame 32 and being provided with the limiting baffle 34, the first elastic member 35 being arranged between the limiting baffle 34 and the mounting frame 32 so as to make the first guide column 33 have a tendency of upward movement, the limiting plate 31 being capable of abutting against the limiting baffle 34 so as to limit the maximum stroke of the first guide column 33 in the vertical direction, a second end of the first guide column 33 penetrating through the mounting frame 32 and being connected with the press head 1; the second protection assembly 4 comprising a second elastic member 41, the pressure sensor 2 being located between the press head 1 and the mounting frame 32, the second elastic member 41 being located between the pressure sensor 2 and the mounting frame 32 and being used for abutting the detection end of the pressure sensor 2 against the press head 1; the output end of the driving member 5 being in transmission connection with the limiting plate 31 so as to drive the load tool to apply pressure to the workpiece through the limiting plate 31.

[0031] The first elastic member 35 applies an upward force to the limiting baffle 34, the limiting baffle 34 drives the first guide column 33 to apply an upward force to the press head 1, for the convenience of understanding, the force applied by the first protection assembly 3 to the press head 1 is denoted as F1; the second elastic member 41 applies a downward force to the pressure sensor 2, for the convenience of understanding, the force applied by the second protection assembly 4 to the press head 1 is denoted as F2, and the gravity of the press head 1 is denoted as G, in the normal state, F1<F2+G, there is a gap between the limiting baffle 34 and the limiting plate 31, the pre-pressing force borne by the pressure sensor 2 is denoted as F 预 , F 预 <F2+G-F1, and the pressure required by the press-fitting process is denoted as F, by selecting appropriate elastic member models, F 预 > F, in the normal state, the forces in the system reach a balanced state, and the elastic members will not be further compressed or rebounded. The pre-pressing force F 预 displayed by the pressure sensor 2 is cleared before press-fitting, and the reading of the pressure sensor 2 during press-fitting is the actual pressure F 实 acting on the product, which can directly display the actual pressure borne by the product.

[0032] When an abnormal state occurs, the output force of the driving member 5 becomes larger or other abnormal conditions occur, F 实 > F 预 , the second elastic member 41 is further compressed, the pressure sensor 2 moves upward, the limiting baffle 34 moves upward until it contacts the limiting plate 31, at this time, the reading of the pressure sensor 2 is still within the range, which is denoted as F maxWhen the limiting baffle 34 contacts the limiting plate 31, if the force further increases, the increased force acts between the limiting baffle 34 and the limiting plate 31, the pressure on the pressure sensor 2 remains unchanged, and the reading of the pressure sensor 2 remains at F. max The above settings protect pressure sensor 2 from damage due to exceeding its range, improve the accuracy and reliability of the pressing process, and ensure the normal operation of the production line.

[0033] In an optional embodiment, the second elastic element 41 is an elastic rubber column, one end of which is connected to the mounting bracket 32 ​​and the other end is connected to the pressure sensor 2, so that the detection end of the pressure sensor 2 abuts against the pressure head 1 and the pressure sensor 2 can move upward in an abnormal state.

[0034] like Figure 3 As shown, in this embodiment, the second protection component 4 further includes a second guide post 42 and an anti-detachment baffle 43. The second guide post 42 is slidably connected to the mounting frame 32 in the vertical direction. The first end of the second guide post 42 is located between the limiting plate 31 and the mounting frame 32, and is provided with an anti-detachment baffle 43. The anti-detachment baffle 43 is used to limit the maximum stroke of the second guide post 42 moving downward in the vertical direction. The second end of the second guide post 42 passes through the mounting frame 32 and is connected to the pressure sensor 2. The second end of the second guide post 42 provides a precise and stable mounting position for the pressure sensor 2, ensuring that the pressure sensor 2 can be accurately fixed in the required position, thereby guaranteeing the accuracy and reliability of its measurement. Furthermore, the second guide post 42 provides stable support for the pressure sensor 2, effectively resisting external interference and vibration, allowing the pressure sensor 2 to remain stable during operation and unaffected by external factors, preventing displacement or shaking. In addition, the second guide post 42 is slidably connected to the mounting bracket 32 ​​in the vertical direction, providing precise guidance for the vertical sliding of the pressure sensor 2, enabling it to slide smoothly in the vertical direction. When faced with abnormal conditions, the pressure sensor 2 can move upwards to avoid being subjected to excessive pressure by the pressure head 1, thereby preventing damage from exceeding the measurement range.

[0035] Specifically, the second guide post 42 includes a sliding part 421 and a mounting part 422. The sliding part 421 is slidably connected to the mounting bracket 32, and one end of the sliding part 421 is connected to the anti-detachment baffle 43, and the other end is connected to the mounting part 422. The mounting part 422 is used to mount the pressure sensor 2. The second elastic member 41 is located between the mounting bracket 32 ​​and the mounting part 422. The restoring force of the second elastic member 41 acts directly on the mounting part 422, which helps to make the pressure sensor 2 mounted on the mounting part 422 uniformly stressed, effectively avoiding measurement errors caused by uneven stress, making the detection results obtained by the pressure sensor 2 more accurate and able to more reliably reflect the actual pressure situation, which is conducive to improving product quality.

[0036] In the embodiment, the first protection assembly 3 further comprises a first sleeve 36, the first sleeve 36 is installed on the mounting frame 32, the first guide column 33 is in sliding connection with the first sleeve 36 in the vertical direction, and the first sleeve 36 provides a stable guide for the sliding of the first guide column 33 in the vertical direction, which is conducive to improving the smoothness and stability of the sliding of the pressure head 1 in the vertical direction.

[0037] The first elastic member 35 is a spring, the spring is sleeved on the first guide column 33, one end of the spring is in abutment with the first sleeve 36, and the other end of the spring is in abutment with the limiting baffle 34. The structure is simple and stable, easy to assemble, and low in production cost. Alternatively, the first elastic member 35 includes but is not limited to an elastic rubber column and the like, which is not limited herein.

[0038] Similarly, the second protection assembly 4 further comprises a second sleeve 44, the second sleeve 44 is installed on the mounting frame 32, and the sliding part 421 is in sliding connection with the second sleeve 44 in the vertical direction, which provides a stable guide for the sliding of the second guide column 42 in the vertical direction, which is conducive to improving the smoothness and stability of the sliding of the pressure sensor 2 in the vertical direction.

[0039] The second elastic member 41 is a spring, the spring is sleeved on the sliding part 421, one end of the spring is in abutment with the second sleeve 44, and the other end of the spring is in abutment with the mounting part 422. The structure is simple and stable, easy to assemble, and low in production cost. Alternatively, the second elastic member 41 includes but is not limited to an elastic rubber column and the like, which is not limited herein.

[0040] In the embodiment, the anti-dropping baffle 43 can be in abutment with the second sleeve 44 to limit the maximum stroke of the downward movement of the second guide column 42 in the vertical direction. In other embodiments, according to the specific structure of the load tooling, the anti-dropping baffle 43 can also be in abutment with the mounting frame 32 to limit the downward movement stroke of the second guide column 42, which is not limited herein.

[0041] As shown in Figure 3 The first protection assembly 3 comprises at least two first guide columns 33, the at least two first guide columns 33 are arranged at intervals along the length direction of the pressure head 1, so that the pressure head 1 is balanced in force, which is conducive to improving the pressure assembly effect. In the embodiment, the first protection assembly 3 comprises two first guide columns 33, one first guide column 33 is arranged at each end of the pressure head 1 along the length direction, and the pressure sensor 2 is located between the two first guide columns 33, which is conducive to improving the force balance of the pressure head 1 and the pressure sensor 2. In other embodiments, the number of the first guide columns 33 can also be three, four or six, and the like, which is not limited herein.

[0042] As shown in Figure 1 and Figure 2As shown, the press-fitting mechanism further comprises a rack and a guide assembly 7, the guide assembly 7 comprises a slide rail 71 and a slide block 72, the slide rail 71 is arranged on the rack and extends in the vertical direction, and the slide block 72 is arranged on the load tool, the slide rail 71 and the slide block 72 are in sliding connection, and the slide rail 71 provides stable guidance for the movement of the load tool in the vertical direction.

[0043] In the embodiment, the load tool further comprises a connecting piece 8, the connecting piece 8 comprises a horizontal part 81 and a vertical part 82 connected at an angle, the horizontal part 81 is used for connecting with the limiting plate 31, the vertical part 82 is used for connecting with the output end of the driving piece 5, the slide block 72 is arranged on the vertical part 82, and the vertical part 82 provides a mounting position for the slide block 72, which is beneficial to increase the contact area of the slide block 72 with the connecting piece 8 and the slide rail 71, further improve the stability of the movement of the load tool in the vertical direction, and improve the quality of the press-fitting product.

[0044] Since the load tool itself has a certain weight, when the actual required press-fitting pressure of the workpiece is less than the weight of the load tool, the press-fitting mechanism is difficult to output the required pressure. To solve the above problem, the press-fitting mechanism further comprises a balancing piece 9, the balancing piece 9 is used for applying a pulling force to the load tool, the pulling force is used to offset the gravity of the load tool, so that the output pressure of the driving piece 5 is the actual pressure acting on the product, and the process requirement is met.

[0045] In the embodiment, the driving piece 5 is a gas cylinder, the gravity of the load tool is offset by the balancing piece 9, the output pressure of the driving piece 5 and the input air pressure can be directly combined, so that the operation and adjustment can be directly observed, and the pressure control precision is improved. Alternatively, the driving piece 5 includes but is not limited to a hydraulic cylinder, an electric cylinder or a motor, which is not limited here.

[0046] Specifically, the output end of the balancing piece 9 is connected with the horizontal part 81, so that the press-fitting mechanism has a reasonable layout and a stable structure, and the stability of the press-fitting process is improved, and the press-fitting effect is improved.

[0047] The balancing piece 9 is a constant-force magnetic spring, which can provide a constant output force within the moving stroke of the load tool, so as to offset the gravity of the load tool and avoid affecting the actual pressure received by the product. The constant-force magnetic spring has a simple structure, low manufacturing and maintenance cost, and relies on its own magnetic properties to work without external energy.

[0048] Alternatively, the balancing piece 9 includes but is not limited to a constant-force electric spring, a constant-force pneumatic spring or a balanced pulley set, which is not limited here.

[0049] The embodiment also provides a press-fitting device, comprising the press-fitting mechanism in any of the above embodiments and a feeding and discharging assembly, the feeding and discharging assembly being used for conveying the workpiece to be press-fitted to the press-fitting position of the press head 1 and removing the workpiece after press-fitting.

[0050] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pressing mechanism, characterized in that, include: The load fixture includes a pressure head (1), a pressure sensor (2), a first protection component (3), and a second protection component (4). The first protection component (3) includes a limiting plate (31), a mounting bracket (32), a first guide post (33), a limiting baffle (34), and a first elastic element (35). The mounting bracket (32) is connected to the limiting plate (31). The first guide post (33) is slidably connected to the mounting bracket (32) in the vertical direction. The first end of the first guide post (33) is located between the limiting plate (31) and the mounting bracket (32) and is provided with the limiting baffle (34). The first elastic element (35) is disposed between the limiting baffle (34) and the mounting bracket (32). Between the mounting brackets (32), the first guide post (33) has an upward tendency, the limiting plate (31) can abut against the limiting baffle (34) to limit the maximum stroke of the first guide post (33) moving upward in the vertical direction, the second end of the first guide post (33) passes through the mounting bracket (32) and is connected to the pressure head (1); the second protection component (4) includes a second elastic element (41), the pressure sensor (2) is located between the pressure head (1) and the mounting bracket (32), the second elastic element (41) is located between the pressure sensor (2) and the mounting bracket (32), and is used to make the detection end of the pressure sensor (2) abut against the pressure head (1); The drive unit (5) is connected to the limiting plate (31) for transmission, so as to drive the load fixture to apply pressure to the workpiece through the limiting plate (31).

2. The pressing mechanism according to claim 1, characterized in that, The second protective component (4) further includes a second guide post (42) and an anti-detachment baffle (43). The second guide post (42) is slidably connected to the mounting bracket (32) in the vertical direction. The first end of the second guide post (42) is located between the limiting plate (31) and the mounting bracket (32), and is provided with the anti-detachment baffle (43). The anti-detachment baffle (43) is used to limit the maximum stroke of the second guide post (42) moving downward in the vertical direction. The second end of the second guide post (42) passes through the mounting bracket (32) and is connected to the pressure sensor (2).

3. The pressing mechanism according to claim 2, characterized in that, The second guide post (42) includes a sliding part (421) and a mounting part (422). The sliding part (421) is slidably connected to the mounting bracket (32), and one end of the sliding part (421) is connected to the anti-detachment baffle (43), and the other end is connected to the mounting part (422). The mounting part (422) is used to mount the pressure sensor (2). The second elastic member (41) is located between the mounting bracket (32) and the mounting part (422).

4. The pressing mechanism according to claim 3, characterized in that, The first protective component (3) further includes a first sleeve (36), which is mounted on the mounting bracket (32), and the first guide post (33) is slidably connected to the first sleeve (36) in the vertical direction; and / or, The second protective component (4) further includes a second sleeve (44), which is mounted on the mounting bracket (32), and the sliding part (421) is slidably connected to the second sleeve (44) in the vertical direction.

5. The pressing mechanism according to claim 1, characterized in that, The first protection component (3) includes at least two first guide posts (33), which are spaced apart along the length of the pressure head (1).

6. The pressing mechanism according to claim 1, characterized in that, The pressing mechanism also includes a frame and a guide assembly (7). The guide assembly (7) includes a slide rail (71) and a slider (72). The slide rail (71) is disposed on the frame and extends in the vertical direction. The slider (72) is disposed on the load fixture. The slide rail (71) and the slider (72) are slidably connected.

7. The pressing mechanism according to claim 6, characterized in that, The load fixture also includes a connector (8), which includes a horizontal part (81) and a vertical part (82) connected at an angle. The horizontal part (81) is used to connect with the limiting plate (31), and the vertical part (82) is used to connect with the output end of the driving member (5). The slider (72) is disposed on the vertical part (82).

8. The pressing mechanism according to any one of claims 1 to 7, characterized in that, The pressing mechanism further includes a balancing element (9) for applying a tensile force to the load fixture, the tensile force being used to counteract the weight of the load fixture.

9. The pressing mechanism according to claim 8, characterized in that, The balancing component (9) is a constant force magnetic spring.

10. A pressing device, characterized in that, It includes a loading and unloading assembly and a pressing mechanism as described in any one of claims 1 to 9, wherein the loading and unloading assembly is used to transport the workpiece to be pressed to the pressing position of the pressing head (1) and remove the workpiece after pressing.

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