CN219287846U - PCBA assembly equipment - Google Patents

Abstract

The utility model provides PCBA assembly equipment, which comprises: a carrying plate; at least three suckers are arranged on the lower surface of the bearing plate, the at least three suckers are not positioned on the same straight line, and each sucker is connected with an air extractor which enables the sucker to generate negative pressure; each sucker comprises an outer ring and a flexible sucker, the outer ring is fixed on the lower surface of the bearing plate, and the flexible sucker is arranged in the outer ring. The utility model can improve the working efficiency of the production line, reduce the labor cost, reduce the product quality risk caused by manual assembly and reduce the generation of bad PCBA.

Description

PCBA assembly equipment

Technical Field

The utility model mainly relates to the technical field of PCBA assembly, in particular to PCBA assembly equipment.

Background

The ECU (Electronic Control Unit, electronic control unit, also called a driving computer) is an electronic core component of the automobile, and plays an increasingly important role in modern automobiles. Modern automobiles tend to develop more electronically and intelligently, and the excellent functions of the ECU are not separated. The ECU core is hardware composed of a high-reliability CPU, various sensors, an interface circuit, an execution control unit and the like, and the ECU has the performance advantages of consistency, stability, robustness, reliability and the like.

PCB (Printed Circuit Board, printed circuit board, also called printed circuit board) is an important electronic component in ECU, and is a support for electronic components, and also a provider of wiring connections for electronic components. The PCB is used as an important component of the ECU product, and the manufacturing, cutting and assembling processes of the PCB have high standard and high-severity process requirements.

The existing PCB assembly process mainly comprises the steps of dividing a PCB with multiple connecting plates into single small plates through automatic plate dividing equipment, then placing the single small plates on a certain carrier, transmitting the single small plates to a designated position through the carrier, taking out the carrier by an operator, and placing the carrier in an HSG (housing). PCBA (Printed Circuit Board +assembly) is formed by loading a PCB blank through SMT and then through the whole process of DIP plug-in, and the corresponding product is also called PCBA. Most manufacturers are willing to choose PCB manufacturers to process the patches at the same time of producing the PCB or let the patch manufacturers replace purchasing the PCB, and the two modes are omitted and troublesome, so that the production efficiency is accelerated. And PCBA factories can realize the two quick and effective processing modes. In the assembly process of the PCBA, especially when the high-number PCBA connector through holes and the Housing Pin needles (120+) are assembled, the traditional manual operation mode not only occupies labor resources and influences the operation efficiency, but also is very likely to damage the PCBA due to excessive contact of operators with the PCBA.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the PCBA assembly equipment, which improves the working efficiency of a production line, reduces the labor cost, reduces the product quality risk generated by manual assembly and reduces the generation of bad PCBA.

In order to solve the above technical problems, the present utility model provides a PCBA assembly device, including: a carrying plate; at least three suckers are arranged on the lower surface of the bearing plate, the at least three suckers are not positioned on the same straight line, and each sucker is connected with an air extracting device which enables the sucker to generate negative pressure; each sucker comprises an outer ring and a flexible sucker, the outer ring is fixed on the lower surface of the bearing plate, and the flexible sucker is arranged in the outer ring.

Optionally, the outer ring has an opening therein for preventing the outer ring from contacting an element on the PCBA.

Optionally, the bearing plate is a triangular bearing plate, and the suckers are distributed at three corners of the bearing plate; the height of each outer ring is equal.

Optionally, the bearing plate and the outer ring are made of metal materials, and the bearing plate and the outer ring are integrally formed.

Optionally, the flexible suction head is made of rubber, before adsorbing the PCBA, the height of the flexible suction head is greater than the height of the outer ring, and after adsorbing the PCBA, the height of the flexible suction head is less than the height of the outer ring.

Optionally, the bearing plate is provided with a through hole penetrating through the bearing plate, and the sucker is positioned below the through hole; the air pipe connector is connected with the sucker, and the air pipe connector is located above the through hole.

Optionally, a rotating mechanism is further provided, and the rotating mechanism is connected to the bearing plate and drives the bearing plate to rotate.

Optionally, the rotating mechanism comprises a motor, an output end of the motor is connected with a transmission shaft, and the transmission shaft is connected with the bearing plate.

Optionally, the connecting the transmission shaft to the bearing plate includes: the transmission shaft is connected with the bearing plate through a quick-change valve; the male head or the female head of the quick-change valve is connected with the bearing plate, and the female head or the male head corresponding to the quick-change valve is connected with the transmission shaft.

Optionally, the transmission shaft is connected with the quick-change valve through a middle piece, the middle piece comprises an upper plate and a lower plate, the upper plate is connected with the transmission shaft, the lower plate is connected with the quick-change valve, and the upper plate is connected with the lower plate through a bolt; the pressure sensor is positioned between the upper plate and the lower plate and senses pressure change transmitted by the bearing plate.

Compared with the prior art, the utility model has the following advantages: has a bearing plate; at least three suckers are arranged on the lower surface of the bearing plate, the at least three suckers are not positioned on the same straight line, and each sucker is connected with an air extractor which enables the sucker to generate negative pressure; each sucker comprises an outer ring and a flexible sucker, wherein the outer ring is fixed on the lower surface of the bearing plate, and the flexible sucker is arranged in the outer ring. The utility model can improve the working efficiency of the production line, reduce the labor cost, reduce the product quality risk caused by manual assembly and reduce the generation of bad PCBA.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the accompanying drawings:

FIG. 1 is a schematic view of the overall structure of a PCBA assembly machine in accordance with one embodiment of the present utility model;

FIG. 2 is a schematic plan view of a PCBA assembly machine in accordance with one embodiment of the present utility model;

FIG. 3 is a schematic view of a front structure of a carrier plate in a PCBA assembly machine in accordance with one embodiment of the present utility model;

FIG. 4 is a schematic view of an unopened structure of an outer ring of a PCBA assembly machine in accordance with one embodiment of the present utility model;

FIG. 5 is a schematic view of an outer ring opening in a PCBA assembly machine in accordance with one embodiment of the present utility model;

FIG. 6 is a schematic view of the back surface structure of a carrier plate in a PCBA assembly machine in accordance with one embodiment of the present utility model;

the marks in the figure respectively represent:

11-a carrier plate;

12-sucking disc, 121-outer ring, 122-flexible sucking head, 123-opening;

13-rotating mechanism, 131-motor, 132-transmission shaft;

14-quick change valve;

15-middle piece, 151-upper plate, 152-lower plate, 153-bolt;

16-a pressure sensor;

17-tracheal tube.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are used in the description of the embodiments will be briefly described below. It is apparent that the drawings in the following description are only some examples or embodiments of the present application, and it is obvious to those skilled in the art that the present application may be applied to other similar situations according to the drawings without inventive effort. Unless otherwise apparent from the context of the language or otherwise specified, like reference numerals in the figures refer to like structures or operations.

As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not specific to the singular, but may include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that, where azimuth terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., indicate azimuth or positional relationships generally based on those shown in the drawings, only for convenience of description and simplification of the description, these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It will be understood that when an element is referred to as being "on," "connected to," "coupled to," or "contacting" another element, it can be directly on, connected or coupled to, or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly connected to," "directly coupled to," or "directly contacting" another element, there are no intervening elements present. Likewise, when a first element is referred to as being "electrically contacted" or "electrically coupled" to a second element, there are electrical paths between the first element and the second element that allow current to flow. The electrical path may include a capacitor, a coupled inductor, and/or other components that allow current to flow even without direct contact between conductive components.

Example 1

Referring to fig. 1 to 6, the PCBA assembling apparatus provided in this embodiment includes, in its main structure: the bearing plate 11 is provided with at least three suckers 12 on the lower surface of the bearing plate 11, the at least three suckers 12 are not positioned on the same straight line, each sucker 12 is connected with an air extracting device which enables negative pressure to be generated, wherein each sucker 12 comprises an outer ring 121 and a flexible sucker 122, the outer ring 121 is fixed on the lower surface of the bearing plate 11, the flexible sucker 122 is arranged in the outer ring 121, and the outer ring 121 is equivalent to enclosing the flexible sucker 122.

In this embodiment, the air extractor extracts air, and then the sucking disc 12 connected with the air extractor generates adsorption force, and through the adsorption of the sucking disc 12, the PCBA can be grabbed, and then other position transfer components, such as a mechanical arm which can move up and down, left and right, front and back, are used for realizing the purpose of transferring the PCBA, so as to assemble the PCBA. Of course, the position moving assembly of the mechanical arm is not in the improved range of the embodiment, and is not unfolded. Theoretically, as long as the suction force of the suction cup 12 is sufficient, one suction cup 12 or both suction cups 12 can suck PCBA, but suction of one point or two points is not three-point suction stable. Therefore, the device of this embodiment adopts the structural style of three sucking discs 12, and three sucking discs 12 are not located on the same straight line, namely through the adsorption of three points for adsorption effect is better, ensures the stability of adsorbing PCBA. The embodiment equipment has the functions of taking and placing boards, realizes that the PCBA is accurately placed in the shell, and the pin needle can be accurately inserted into the PCBA connector through hole, so that the concentricity of the pin needle and the PCBA connector through hole is ensured, and the PCBA assembly is smoothly carried out.

In some embodiments, the outer ring 121 has an opening 123, the opening 123 being configured to prevent the outer ring 121 from contacting an electronic component on the PCBA, causing damage to the electronic component. When sucking disc 12 adsorbs PCBA, especially under the condition that PCBA has more electronic component, because outer loop 121 has certain height, when sucking disc 12 adsorbs PCBA, outer loop 121 can directly contact with PCBA, appears outer loop 121 easily to the extrusion condition of electronic component on the PCBA, leads to electronic component to warp, influences electronic component's performance when serious, and then influences the performance of whole PCBA. Therefore, it is important to reduce damage to the electronic components on the PCBA while ensuring effective adsorption and transfer to the PCBA. The apparatus of this embodiment employs an opening 123 structure.

Referring to fig. 4 and 5, in fig. 4, the outer ring 121 is a cylindrical ring, and in the middle of the outer ring 121 is a flexible suction head 122, the flexible suction head 122 is enclosed by the entire outer ring 121, and when the suction cup 12 sucks the PCBA, the outer ring 121 is in direct contact with the PCBA. In fig. 5, the outer ring 121 is modified to provide an opening 123, i.e., a portion of the original unitary outer ring 121 is cut away, typically the portion that would contact the electronic components on the PCBA. By adopting the structure, on one hand, the adsorption effect can be ensured, and on the other hand, because the outer ring 121 is provided with the opening 123, when the sucker 12 works, the electronic element at the corresponding position on the PCBA can be positioned in the opening 123 and cannot be extruded by the outer ring 121. Especially, the dense position of the electronic components on the PCBA has more obvious avoidance effect on the electronic components by the opening 123, and the effect is more remarkable.

In some embodiments, the carrier plate 11 is a triangular carrier plate 11, and suction cups 12 are distributed at three corners of the carrier plate 11, and the heights of each outer ring 121 are equal. Although the device of the embodiment can be provided with three or more suction cups 12, from the practical point of view, the three suction cups 12 can ensure the stability of sucking PCBA, and the minimum suction cup 12 is adopted, so that the cost of the device can be reduced. In the case of adopting three suckers 12, the bearing plate 11 matched with the suckers 12 is arranged in a triangle shape, so that the requirement that the three suckers 12 are not on the same straight line is met, and meanwhile, the material consumption of the bearing plate 11 can be reduced. In this embodiment, the heights of the outer rings 121 are equal, firstly, in order to stably grasp the PCBA, the heights of the three outer rings 121 are kept consistent, so that the PCBA is ensured to be in the same plane when being sucked; secondly, the device can be standardized more.

In some embodiments, the carrier plate 11 and the outer ring 121 are made of metal, and the carrier plate 11 and the outer ring 121 are integrally formed. The bearing plate 11 and the outer ring 121 are made of metal materials, so that the bearing plate has good mechanical properties and is beneficial to molding. The carrier plate 11 and the outer ring 121 are integrally formed, so that the assembly process and the assembly times of equipment can be reduced, and other unpredictable risks caused by excessive equipment assembly processes can be avoided.

In some embodiments, the flexible tip 122 may be made of rubber, and the height of the flexible tip 122 is greater than the height of the outer ring 121 before PCBA is adsorbed, and the height of the flexible tip 122 is less than the height of the outer ring 121 after PCBA is adsorbed. After the PCBA is adsorbed by the suction cup 12, the height of the flexible suction head 122 is smaller than that of the outer ring 121, so that the outer ring 121 directly contacts the PCBA, and the PCBA is adsorbed more firmly due to the high structural strength of the outer ring 121.

In some embodiments, the carrier plate 11 has a through hole (not shown) penetrating the carrier plate 11, and the suction cup 12 is located below the through hole. An air pipe joint 17 connected with the sucker 12 is also arranged, and the air pipe joint 17 is positioned above the through hole. With this structure, the suction device connected to the suction cup 12 can be connected to the suction cup 12 through the air pipe joint 17, and the suction cup 12 and other suction components are respectively arranged on the lower surface and the upper surface of the bearing plate 11. As shown in fig. 3, the suction cup 12 is located on the left side of the lower surface of the carrier plate 11, and the air pipe joint 17 is located on the right side, i.e. the upper surface of the carrier plate 11, so that the influence of the air suction pipeline or pipeline on the PCBA when the PCBA is sucked can be reduced.

In some embodiments, a rotating mechanism 13 is further provided, and the rotating mechanism 13 is connected to the carrier plate 11 to rotate the carrier plate 11. Taking fig. 1 as an example, the rotation mechanism 13 is located above the whole apparatus, and the carrier plate 11 is connected below the rotation mechanism 13, typically at the center of the carrier plate 11. When the rotation mechanism 13 rotates, the carrier plate 11 is driven to rotate in the same direction as the counterclockwise direction in the drawing, and the carrier plate 11 can rotate about the axis a in the drawing. The structure has the advantages that when the position of the PCBA is not aligned by the suction cup 12, the bearing plate 11 can be rotated to a proper position through the rotating mechanism 13, the PCBA is sucked and grabbed again, the grabbing effect is better, and the electronic component of the PCBA is prevented from being damaged due to improper position.

In some embodiments, the rotation mechanism 13 includes a motor 131, an output end of the motor 131 is connected to a transmission shaft 132, and the transmission shaft 132 is connected to the carrier plate 11. The transmission shaft 132 bears both bending moment and torque in the rotation process, and the rotation power is transmitted through the transmission shaft 132, so that the rotation stability of the bearing plate 11 in the embodiment is improved.

In some embodiments, the transmission shaft 132 is connected to the carrier plate 11, and the transmission shaft 132 may be connected to the carrier plate 11 through the quick-change valve 14. For example, the male or female of the quick-change valve 14 is connected to the carrier plate 11, and the corresponding female or male of the quick-change valve 14 is connected to the transmission shaft 132. Through setting up quick change valve 14, can change the loading board 11 of different models or equidimension, satisfy the assembly requirement of different PCBA for the adaptability of this embodiment equipment is strong. When in use, the male head of the quick-change valve 14 is connected to the component of the rotating mechanism 13 (of course, the same reason is that the female head is connected), while the female head of the corresponding quick-change valve 14 is fixed on the bearing plate 11, and the proper bearing plate 11 is selected, so that the female head of the bearing plate 11 is connected with the male head of the rotating mechanism 13, and the operation is convenient.

In some embodiments, the drive shaft 132 connects the quick change valve 14 through the intermediate member 15. The intermediate member 15 includes an upper plate 151 and a lower plate 152, the upper plate 151 is connected to the transmission shaft 132, the lower plate 152 is connected to the quick change valve 14, and the upper plate 151 and the lower plate 152 are connected by bolts 153. A pressure sensor 16 is also provided, the pressure sensor 16 is located between the upper plate 151 and the lower plate 152, and senses the pressure change transmitted from the carrier plate 11. When taking and placing PCBA, the current PCBA displacement is timely known whether to be abnormal or not through pressure monitoring. If the pressure is abnormal when the current PCBA is fetched and placed, the operation of the equipment should be stopped immediately, so that the PCBA is prevented from being damaged.

The operation and manner of the device of this embodiment will be described below using a PCBA assembly process as an example.

Take high numbers of PCBA connector through holes and Housing Pin pins (more than 120 pins) as an example. Firstly, PCBA is placed in advance in a positioning box with positioning effect, and the positioning box is provided with positioning columns and supporting columns, and the positioning and horizontal supporting of the positioning box ensure that the segmented PCBA is placed horizontally. The suction device is started to enable the sucker 12 to generate suction force, and PCBA is extracted from the positioning box. In addition, in the adsorption transfer process, the vacuum negative pressure real-time monitoring equipment can monitor the negative pressure value of the sucker 12 in real time, and if the negative pressure value is abnormal, the equipment is in an alarm and is stopped. Second, the PCBA is placed in the HSG (housing), which requires location detection of the HSG. Specifically, deviation is made according to characteristic point connecting lines of each photographing and standard teaching fitting straight lines, the deviation is sent to a PLC (Programmable Logic Controller ) to change the coordinate positions of the servo, and accurate positioning is achieved. The positioning function can be performed by the corresponding device, and is not developed here. Thirdly, putting down the PCBA according to the proper position calculated by the PLC for placing the PCBA. When the PCBA is taken and placed, the pressure is monitored by the pressure sensor 16 to check whether the PCBA is abnormal in current displacement. Fourth, after the placement of the PCBA is successful, the two positioning posts on the HSG are grabbed to be exposed from the placed PCBA, and then the assembly process of the PCBA is completed. It will be appreciated that other relevant details may be involved in the PCBA assembly, as these are not improvements of the present embodiment and will not be elaborated upon herein, but do not affect an understanding of the technical content of the present embodiment.

The PCBA assembly equipment provided by the embodiment is provided with a bearing plate, wherein the lower surface of the bearing plate is provided with at least three suckers, the at least three suckers are not positioned on the same straight line, and each sucker is connected with an air extractor which enables the sucker to generate negative pressure; each sucker comprises an outer ring and a flexible sucker, wherein the outer ring is fixed on the lower surface of the bearing plate, and the flexible sucker is arranged in the outer ring. The utility model can improve the working efficiency of the production line, reduce the labor cost, reduce the product quality risk caused by manual assembly and reduce the generation of bad PCBA.

While the basic concepts have been described above, it will be apparent to those skilled in the art that the above disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements, and adaptations of the present application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within this application, and are therefore within the spirit and scope of the exemplary embodiments of this application.

Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present application may be combined as suitable.

Likewise, it should be noted that in order to simplify the presentation disclosed herein and thereby aid in understanding one or more inventive embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof. This method of disclosure, however, is not intended to imply that more features than are presented in the claims are required for the subject application. Indeed, less than all of the features of a single embodiment disclosed above.

In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations that may be employed in some embodiments to confirm the breadth of the range, in particular embodiments, the setting of such numerical values is as precise as possible.

While the present application has been described with reference to the present specific embodiments, those of ordinary skill in the art will recognize that the above embodiments are for illustrative purposes only, and that various equivalent changes or substitutions can be made without departing from the spirit of the present application, and therefore, all changes and modifications to the embodiments described above are intended to be within the scope of the claims of the present application.

Claims (10)

1. A PCBA assembly device, comprising:

a carrying plate;

at least three suckers are arranged on the lower surface of the bearing plate, the at least three suckers are not positioned on the same straight line, and each sucker is connected with an air extracting device which enables the sucker to generate negative pressure;

each sucker comprises an outer ring and a flexible sucker, the outer ring is fixed on the lower surface of the bearing plate, and the flexible sucker is arranged in the outer ring.

2. The PCBA assembling apparatus of claim 1, wherein the outer ring has an opening therein for preventing the outer ring from contacting components on the PCBA.

3. The PCBA assembling apparatus of claim 1, wherein the carrier plate is a triangular carrier plate, the suction cups being distributed at three corners of the carrier plate; the height of each outer ring is equal.

4. The PCBA assembling apparatus of claim 1, wherein the carrier plate and the outer ring are made of metal, and the carrier plate and the outer ring are integrally formed.

5. The PCBA assembling apparatus of claim 1, wherein the flexible tip is made of rubber, the height of the flexible tip being greater than the height of the outer ring before adsorbing the PCBA, and the height of the flexible tip being less than the height of the outer ring after adsorbing the PCBA.

6. The PCBA assembling apparatus of claim 1, wherein the carrier plate has a through hole therethrough, the suction cup being located below the through hole; the air pipe connector is connected with the sucker, and the air pipe connector is located above the through hole.

7. The PCBA assembling apparatus of claim 1, further provided with a rotation mechanism connected to the carrier plate to rotate the carrier plate.

8. The PCBA assembling apparatus of claim 7, wherein the rotating mechanism includes a motor, an output end of the motor being connected to a drive shaft, the drive shaft being connected to the carrier plate.

9. The PCBA assembly device of claim 8, wherein the drive shaft connecting the carrier plate comprises: the transmission shaft is connected with the bearing plate through a quick-change valve;

the male head or the female head of the quick-change valve is connected with the bearing plate, and the female head or the male head corresponding to the quick-change valve is connected with the transmission shaft.

10. The PCBA assembling apparatus of claim 9, wherein the drive shaft connects the quick change valve through an intermediate member, the intermediate member comprising an upper plate and a lower plate, the upper plate connecting the drive shaft, the lower plate connecting the quick change valve, the upper plate and the lower plate being connected by a bolt;

the pressure sensor is positioned between the upper plate and the lower plate and senses pressure change transmitted by the bearing plate.

Images