Bridge type three-coordinate measuring machine

Abstract

The invention discloses a bridge-type three-coordinate measuring machine, and the machine comprises a pedestal; fixing a table; a cross beam unit; the first driving mechanism is used for driving the cross beam unit to move in the Y direction relative to the fixed table; the sliding frame is arranged on the cross beam unit in a sliding manner; a second driving mechanism; the Z-axis assembly comprises a Z-axis component; a balance bracket assembled to the carriage and including a top member; the third driving mechanism drives the Z-axis component to move up and down; the balance component is assembled on the Z-axis component and comprises a telescopic piece; the elastic damping unit is assembled on the top component and comprises an installation part, an elastic damping part and an elastic damping part, the sleeve piece is arranged on the mounting piece in a sleeving manner, is inserted into the top component and comprises an extension part; the elastic buffer piece is arranged on the sleeve piece in a sleeving manner and is arranged between the extension part and the top component; and the locking part is locked on the mounting part and is pressed on the extension part. The bridge type three-coordinate measuring machine provided by the invention is used for damping the vibration of the balance cylinder transmitted by the balance bracket.

Description

Technical Field

[0001] This invention belongs to the field of measurement technology, specifically, it relates to an improvement in the structure of a bridge-type coordinate measuring machine. Background Technology

[0002] Bridge-type coordinate measuring machines are widely used in the optical industry for measuring lens barrels, optical molds, etc.; in the electronics industry for measuring precision housings, precision connectors for mobile phones, etc.; and in the precision machinery field for measuring small precision parts, small precision gears, and transmission components.

[0003] Measurement is mainly achieved through a probe located at the bottom of the Z-axis assembly. To ensure the accuracy of Z-axis measurement and the stability of vertical movement, a balancing pneumatic component is usually installed on the Z-axis assembly to ensure smooth vertical movement of the Z-axis component. This component is mounted on a balancing bracket. However, in actual use, the balancing bracket may be subjected to external impact or vibrate when the drive mechanism on the Z-axis is activated. The vibration of the balancing bracket will then transmit the force to the balancing pneumatic component, thereby affecting the motion stability of the entire Z-axis assembly and the measurement accuracy of the probe on the Z-axis assembly.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0005] To address the aforementioned technical problems of the Z-axis component in existing coordinate measuring machines, a bridge-type coordinate measuring machine is proposed. This machine is used to dampen vibrations at the point where the balance support transmits the pneumatic components, thereby preventing any impact on the motion accuracy of the Z-axis component and ensuring the overall measurement accuracy of the machine.

[0006] To achieve the above-mentioned invention / design objectives, the present invention adopts the following technical solution: A bridge-type coordinate measuring machine includes: Base; A fixed platform mounted on the base; The beam unit includes a beam and a first leg and a second leg connected to both ends of the beam; A first drive mechanism is used to drive the first leg and the second leg to move relative to the fixed platform along the Y direction; A slide carriage is slidably mounted on the crossbeam; The second drive mechanism is used to drive the carriage to move relative to the crossbeam along the X direction; Z-axis assembly, including: Z-axis components; A balance bracket, assembled onto the carriage, includes a top component; The third drive mechanism, mounted on the carriage and balance bracket, is used to drive the Z-axis components to move up and down. The balancing component, assembled on the Z-axis component, includes a telescopic extension member; The elastic damping unit, assembled on the top component, includes: The mounting component has a receiving and positioning part that accommodates and positions the telescopic component, and it is disposed through the top component. An elastic damping assembly, disposed on at least one side of the top or bottom side of the top member, includes: The kit is fitted onto the mounting member and inserted into the top member, and includes an extension disposed circumferentially along the kit. An elastic cushioning element, fitted onto the kit, is positioned between the extension and the top member; A locking component is locked onto the mounting piece and pressed onto the extension.

[0007] Compared with the prior art, the advantages and positive effects of the present invention are: The bridge-type coordinate measuring machine proposed in this invention has an elastic damping unit connected to the balancing component on the balancing support. When the balancing support is subjected to external force, it will be transmitted to the elastic buffer through the top component. The elastic buffer plays a role in buffering, isolating and damping vibration, so as to prevent the force and vibration of the balancing support from being transmitted to the kit and then to the balancing component connected to the kit and the mounting component, which would affect the motion accuracy of the Z-axis component connected to the balancing component, thus ensuring the motion stability of the Z-axis component and the measurement accuracy of the whole machine.

[0008] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a three-dimensional structure of an embodiment of the bridge-type coordinate measuring machine proposed in this invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the elastic vibration damping unit assembled on the balance support in one embodiment of the bridge-type coordinate measuring machine proposed in this invention; Figure 3 for Figure 2 A magnified view of part A; Figure 4 This is a structural diagram of the balance support and Z-axis components of an embodiment of the bridge-type coordinate measuring machine proposed in this invention; Figure 5 for Figure 4 A magnified view of section B; Figure 6 This is a structural diagram of the eccentric adjustment component and the balance support of an embodiment of the bridge-type coordinate measuring machine proposed in this invention; Figure 7 yes Figure 6 A magnified view of a portion at point C; Figure 8 This is a three-dimensional structure of an embodiment of the bridge-type coordinate measuring machine proposed in this invention. Figure 2 ; Figure 9 yes Figure 8 A magnified view of a portion at point D; Figure 10 This is a schematic diagram of the base of an embodiment of the bridge-type coordinate measuring machine proposed in this invention; Figure 11 This is a structural diagram showing the connection and cooperation between the third drive mechanism and the Z-axis component of an embodiment of the bridge-type coordinate measuring machine proposed in this invention.

[0011] In the diagram, 100 is the base; 110 is the outer shell component; 120 is the first support platform; 130 is the second support platform; 140 is the first support member; 141 is the first elastic support member; 142 is the first rigid support member; 143 is the first support column; 150 is the second support member; 160 is the door body; 170 is the third support member; 200 is the fixed platform; 310 is the crossbeam; 320 is the first support leg; 330 is the second support leg; 410 is the first drive mechanism; 420 is the second drive mechanism; 430 is the third drive mechanism; 431 is the third main pulley; 432 is the third driven pulley; 433 is the third belt; 500 is the carriage; 510 is the guide member; and 600 is the Z-axis assembly. 610. Z-axis component; 620. Balance bracket; 621. Top component; 622. Adjustment hole; 623. Frame body; 624. End cap; 625. Hole; 626. Guide elongated hole; 627. Locking elongated hole; 630. Balance component; 631. Telescopic component; 632. Floating head; 710. Mounting component; 711. Receiving and positioning part; 720. Kit; 721. Extension part; 730. Elastic buffer component; 740. Locking component; 750. Shim; 751. Positioning groove; 760. Eccentric adjustment component; 770. Locking component; 810. Cable fixing component; 820. Drag chain cable end fixing component; 830. Connector; 840. Elastic element. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0014] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0015] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0016] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0017] In some embodiments of this application, a bridge-type coordinate measuring machine is proposed, wherein the travel dimensions of the bridge-type coordinate measuring machine are: X: 500mm, Y: 500mm, Z: 500mm.

[0018] The bridge-type coordinate measuring machine includes a base 100 and a fixed platform 200 disposed on the base 100, the base 100 being used to support the fixed platform 200 placed on it.

[0019] A placement position for placing a workpiece is formed on the stationary stage 200. During measurement, the workpiece can be placed at the placement position of the stationary stage 200 for measurement.

[0020] When setting up, a high-precision granite platform can be selected for the station 200.

[0021] The beam unit includes a beam 310 and a first leg 320 and a second leg 330 connected at both ends of the beam 310.

[0022] The crossbeam 310 can adopt a triangular beam structure. The first leg 320 is vertically connected to one end of the crossbeam 310 and serves as the main leg of the entire crossbeam unit. The second leg 330 is vertically connected to the other end of the crossbeam 310 and serves as the secondary leg of the entire crossbeam unit.

[0023] The first drive mechanism 410 is used to drive the crossbeam unit to move relative to the fixed platform 200 along the Y direction.

[0024] The first drive mechanism 410 provides driving force, causing the first leg 320 and the second leg 330 to slide relative to the fixed platform 200 along the Y direction, thereby realizing the adjustment of the position of the crossbeam unit in the Y direction.

[0025] Specifically, a main guide rail and a secondary guide rail are provided on the fixed platform 200, and the first leg 320 and the second leg 330 move along the main guide rail and the secondary guide rail, respectively.

[0026] In some embodiments of this application, the first drive mechanism 410 includes a first drive motor and a first belt and pulley drive mechanism that is drively connected to the first drive motor.

[0027] The first belt and pulley transmission mechanism includes a first main pulley, a second driven pulley, and a first transmission belt wound around the first main pulley and the first driven pulley. The first transmission belt is connected to the first support leg 320, thereby driving the entire crossbeam 310 unit to move.

[0028] The carriage 500 is slidably mounted on the crossbeam 310.

[0029] The second drive mechanism 420 is used to drive the carriage 500 to move relative to the crossbeam 310 in the X direction.

[0030] The second drive mechanism 420 provides power for the carriage 500 to move along the crossbeam 310. It is connected to the carriage 500 and is used to drive the carriage 500 to move along the crossbeam 310 in the X direction.

[0031] In some embodiments of this application, the second drive mechanism 420 includes: a second drive motor and a second belt and pulley drive mechanism that is drively connected to the second drive motor.

[0032] The second belt and pulley transmission mechanism includes: a second main pulley, a second driven pulley, and a second transmission belt wound around the first main pulley and the second driven pulley, the second transmission belt being connected to the carriage 500.

[0033] In some embodiments of this application, the bridge-type coordinate measuring machine includes a Z-axis assembly 600, which includes a Z-axis component 610, a balance bracket 620, a balance member 630, and a third drive mechanism 430 for driving the Z-axis component 610 to move up and down.

[0034] The balance bracket 620 is assembled onto the carriage 500 and includes a top member 621 located at its top position.

[0035] A receiving cavity is formed inside the balance support 620, and the third transmission mechanism and the balance component 630 are both arranged in the receiving cavity.

[0036] The Z-axis component 610 is located below the balance bracket 620, and a mounting plate is located at the top of the Z-axis component 610.

[0037] The balancing component 630 is mounted on the mounting plate of the Z-axis component 610 and includes a telescopic extension member 631.

[0038] A probe is provided at the bottom of the Z-axis component 610.

[0039] The third drive mechanism 430 includes a third drive motor and a third belt and pulley drive mechanism connected thereto. The third belt and pulley drive mechanism includes a third main pulley 431, a third driven pulley 432, and a third belt 433 wound around the third main pulley 431 and the third driven pulley 432.

[0040] The third main pulley 431 is fixed to the slide 500, the third driven pulley 432 is fixed to the top component 621, and the third belt 433 is connected to the Z-axis component 610. When the third drive motor is activated, it drives the third belt 433 to move up and down, thereby driving the Z-axis component 610 to move up and down.

[0041] In some embodiments, the horizontal component is a balancing cylinder, the telescopic component 631 is a telescopic cylinder rod, and a floating head 632 is provided at the end of the cylinder rod.

[0042] In some embodiments of this application, the bridge-type coordinate measuring machine includes: an elastic damping unit, mounted on the top member 621, which is connected to the floating head 632 on the telescopic member 631 of the balance member 630 and isolates the vibration transmitted from the balance support 620 to the balance member 630.

[0043] The elastic damping unit includes: The mounting member 710 has a receiving and positioning part 711 formed inside to accommodate and position the telescopic member 631, which is disposed through the top member 621.

[0044] The mounting component 710 is a mounting cylinder, and the receiving and positioning part 711 is a receiving and positioning hole formed in the mounting cylinder. The receiving and positioning hole includes a first hole body and a second hole body that are connected vertically in sequence, and the inner diameter of the second hole body is smaller than the inner diameter of the first hole body.

[0045] During assembly, the floating head 632 is inserted into the first hole and locked at the port of the second hole to achieve connection with the mounting part 710 and not to come out of the mounting part 710.

[0046] The elastic damping component is disposed on at least one side of the top or bottom side of the top member 621. That is, when the elastic damping component is disposed, it can be disposed at the top side of the top member 621, or at the bottom side of the top member 621, or both at the top and bottom sides of the top member 621.

[0047] The elastic damping components include: The kit 720 is fitted onto the mounting member 710 and inserted into the top member 621, and includes an extension 721 arranged perpendicular to the axis of the kit 720.

[0048] An insertion hole is provided in the top component 621, and during assembly, the mounting part 710 is inserted into the insertion hole from top to bottom.

[0049] Kit 720 is a sleeve that is fitted onto mounting piece 710 and partially inserted into the insertion hole.

[0050] The extension 721 is a circumferential flange arranged along the circumference of the kit 720.

[0051] An elastic buffer 730 is fitted onto the kit 720 and disposed between the extension 721 and the top member 621; The elastic buffer 730 is a ring-shaped elastic pad 750, which can be made of rubber or soft rubber.

[0052] The elastic buffer 730 is mainly used to buffer, isolate, and reduce vibration.

[0053] A locking component 740 is locked onto the mounting member 710 and pressed onto the extension 721. The locking component 740 is a lock nut.

[0054] During installation, the mounting part 710 is provided with external threads, and the locking part 740 is screwed onto the mounting part 710 to press the extension 721 to press and fix the kit 720. The kit 720 is pressed onto the elastic buffer 730, thereby achieving the pressing and fixing of the elastic buffer 730.

[0055] The floating head 632 on the telescopic member 631 of the balancing member 630 is connected to the mounting part 710 of the top member 621. The balancing member 630 is assembled on the Z-axis component 610. When the Z-axis component 610 moves under the drive of the third drive mechanism 430, it can drive the balancing member 630 to move, thereby causing relative tension between the balancing member 630 and the telescopic member 631, so as to provide a reverse force to the Z-axis component 610 and ensure the smoothness of the movement of the Z-axis component 610.

[0056] When the balance bracket 620 is subjected to external force, it will be transmitted to the elastic buffer 730 through the top component 621. The elastic buffer 730 plays a role in buffering, vibration isolation and shock absorption, so as to prevent the force and vibration of the balance bracket 620 from being transmitted to the kit 720 and then to the balance component 630 connected to the kit 720 and the mounting component 710, which would affect the motion accuracy of the Z-axis component 610 connected to the balance component 630 and affect the accuracy of the measurement.

[0057] In some embodiments of this application, the bridge-type coordinate measuring machine includes: A gasket 750 is fitted onto the kit 720, and a positioning groove 751 is provided on the gasket 750. The elastic buffer 730 is arranged between the gasket 750 and the extension 721 and is located within the positioning groove 751.

[0058] By arranging the elastic buffer 730 inside the pad 750 with the positioning groove 751, the elastic buffer 730 can be positioned and fixed by the positioning groove 751.

[0059] During arrangement, the positioning groove 751 is opened along the circumference of the gasket 750, and the elastic buffer 730 is embedded in the circumferentially arranged gasket 750.

[0060] In some embodiments of this application, an adjustment hole 622 is provided on the balance bracket 620; An eccentric adjusting member 760 is rotatably mounted on the carriage 500, located inside the adjusting hole 622 and in contact with the top wall of the adjusting hole 622. A guide structure is formed on the carriage 500 and the balance support 620 to guide the balance support 620 when it moves up and down; Locking element 770 is used to fix the balance bracket 620 after it has been adjusted into place.

[0061] By rotating the eccentric adjustment component 760, the height of the top component 621 at the top position of the balance bracket 620 can be precisely adjusted.

[0062] The adjustment hole 622 is an elongated hole with an open bottom, and the eccentric adjustment component 760 is an eccentric adjustment block, which includes an eccentric protrusion that abuts against the top wall of the adjustment hole 622.

[0063] The guide structure includes a guide member 510 disposed on the carriage 500 and a guide elongated hole 626 disposed on the balance bracket 620. The guide member 510 is inserted into the guide elongated hole 626. Through the cooperation of the guide member 510 and the guide elongated hole 626, the balance bracket 620 can be limited to moving up and down along the guide member 510.

[0064] The locking component 770 is a locking screw. A locking elongated hole 627 is provided on the balance bracket 620, and a threaded locking hole is provided on the slide 500. It is used to lock the balance bracket 620 in place after adjustment. When the balance bracket 620 needs to be adjusted again, the locking component 770 and the locking elongated hole 627 on the balance bracket 620 can be loosened to ensure that the balance bracket 620 can move up and down when the height is adjusted, without interfering with the up and down movement of the balance bracket 620.

[0065] When fine adjustments are needed to the height of the balance bracket 620, the eccentric adjustment component 760 can be rotated. When the eccentric adjustment component 760 is rotated, its eccentric protrusion will abut against the top wall of the adjustment hole 622. Because the eccentric adjustment component 760 is eccentric, it will drive the entire balance bracket 620 to move up and down. When the balance bracket 620 moves up and down, it is guided and limited by the guide elongated hole 626 and the guide component 510 above it. After the balance bracket 620 is adjusted to the correct position, the locking screw can be tightened and fixed to the threaded locking hole to press and fix the balance bracket 620.

[0066] In some embodiments of this application, the base 100 includes: a housing member 110; and A first support platform 120 and a second support platform 130 are arranged within the outer shell component 110, and the first support platform 120 and the second support platform 130 are arranged opposite to each other.

[0067] The first support member 140 is respectively disposed on the first support platform 120 and the second support platform 130, and is used to support the bottom of the fixed platform 200. The arrangement of the first support member 140 on the bottom of the fixed platform 200 can be used to support the fixed platform 200 placed on the base 100.

[0068] The second support member 150 is disposed on the first support platform 120 or the second support platform 130, and its height relative to the first support platform 120 or the second support platform 130 is adjustable, and there is a gap between it and the fixed platform 200.

[0069] During setup, the first support member 140 is placed directly on the first support platform 120 and the second support platform 130, and the second support member 150 is screwed and fixed on the first support platform 120 or the second support platform 130. When adjusting the height, the depth of air entering the first support platform 120 or the second support platform 130 can be changed by screwing the second support member 150.

[0070] When the fixed platform 200 is placed on the base 100, it is mainly supported by the first support member 140 arranged on the first support platform 120 and the second support platform 130. The second support member 150 is an auxiliary support member. It has a gap with the fixed platform 200. When the fixed platform 200 is subjected to force and vibrates, it can support and limit the fixed platform 200 to prevent the fixed platform 200 from tipping over.

[0071] In the arrangement, three first support members 140 are set, one of which is located in the middle of the first support platform 120, and the other two are located at both ends of the second support platform 130. The two first support members 140 form a triangular support structure, which has better stability.

[0072] Two second support members 150 are provided, symmetrically arranged on both sides of one of the first support members 140 on the first support platform 120.

[0073] In some embodiments of this application, the first support member 140 includes: a first elastic support member 141, a first rigid support member 142, and a first support column 143 inserted into the first rigid support member 142. The first elastic support member 141 and the first rigid support member 142 are bonded and fixed, and the first support column 143 is inserted into the first rigid support member 142.

[0074] The first elastic support 141 is a first elastic rubber pad, which can be used to buffer and isolate vibrations.

[0075] The first rigid support member 142 is used to provide rigid support. The first support column 143 is vertically inserted into the first rigid support member 142 to achieve quick assembly with the first rigid support member 142. The overall structure is simple and easy to assemble.

[0076] The second support member 150 is the first support stud, and an internal threaded hole is provided in the first support platform 120. The second support member 150 is screwed into the internal threaded hole.

[0077] In some embodiments of this application, an openable or closable door 160 is provided on at least one side of the outer casing. The door 160 is rotatably connected to the outer casing member 110 via a hinge, and the openable door 160 facilitates machine maintenance.

[0078] In some embodiments of this application, the bridge-type coordinate measuring machine includes: The third support member 170 consists of two parts arranged at an angle of 30-60 degrees.

[0079] One end of the two third support members 170 intersects and is connected to the first support platform 120, and the other end of the two third support members 170 is connected to the second support platform 130.

[0080] The third support member 170 is a third support plate, and there are two of them. The two third support plates intersect at one end and are far apart at the other end. The far ends of the two third support members 170 are connected to the two ends of the second support platform 130.

[0081] When fixed, the intersecting end of the third support plate is welded and fixed to the first support platform 120, and the other end is welded and fixed to the second support platform 130.

[0082] Two third support members 170 and a second support platform 130 form a triangular support structure, which provides stable support for the fixed platform 200.

[0083] In some embodiments of this application, the bridge-type coordinate measuring machine includes: The cable fastener 810 has a mounting position for installing cables formed on its upper part and is fixed on the carriage 500. The cable end fixing member 820 of the drag chain has a gap with the cable fixing member 810.

[0084] The cable fastener 810 is a cable fixing plate, and the cable is bundled at the mounting position of the cable fixing plate.

[0085] The cable end fixing component 820 is a cable end fixing plate for cable carriers, which is used to fix the cable end and the cable carrier.

[0086] Connector 830 connects the cable fixing member 810 and the drag chain cable end fixing member 820; The elastic element 840 is sleeved on the connector 830, with its two ends abutting against the cable fixing part 810 and the drag chain cable end fixing part 820, respectively.

[0087] The connector 830 is a connecting stud, and the elastic element 840 is an elastic post, both made of rubber or soft rubber.

[0088] A first through hole and a second through hole are respectively provided on the cable fixing component 810 and the drag chain cable end fixing component 820.

[0089] The connector 830 passes through the first through hole, the elastic element 840, and the second through hole, and is then locked in place by a nut to connect the cable fixing member 810 and the drag chain cable end fixing member 820.

[0090] During the movement of the carriage 500, the cable and cable chain will vibrate, and this vibration will be absorbed by the elastic element 840. The bending stress of the cable and cable chain will also change during the movement. By configuring the elastic element, the impact of the stress on the cable and cable chain will be reduced, which helps to ensure the measurement accuracy of the machine.

[0091] In some embodiments of this application, the belts of the first belt and pulley transmission mechanism, the second belt and pulley transmission mechanism, and the third belt and pulley transmission mechanism are all multi-ribbed belts and the pulleys are multi-ribbed belt pulleys.

[0092] The three drive mechanisms of the bridge-type coordinate measuring machine all adopt a multi-wedge belt and multi-wedge belt pulley structure, which helps to improve the smoothness of machine movement and scanning accuracy.

[0093] In some embodiments of this application, the bridge-type coordinate measuring machine includes an X-axis air-bearing guide, a Y-axis air-bearing guide, and a Z-axis air-bearing guide, wherein the air-bearing gap between the X-axis air-bearing guide, the Y-axis air-bearing guide, and the Z-axis air-bearing guide is 6μm-8μm.

[0094] Multiple X-direction air-bearing guide components are provided, fixed on the carriage 500, and arranged around the crossbeam 310. Multiple Y-direction air-bearing guide components are provided. A main guide rail and a secondary guide rail are provided on the fixed platform 200. Some Y-direction air-bearing guide components are located around the main guide rail and are mounted on the first support leg 320. Some Y-direction air-bearing guide components are located on the top of the secondary guide rail and are mounted on the second support leg 330.

[0095] When the crossbeam 310 unit moves along the main guide rail and the auxiliary guide rail via the first leg 320 and the second leg 330, its movement can be guided by the Y-direction air-bearing guide.

[0096] Multiple Z-axis air-bearing guides are provided, fixed on the carriage 500, and arranged around the Z-axis component 610 to guide the movement of the Z-axis component 610.

[0097] The X-axis air-bearing guide, Y-axis air-bearing guide, and Z-axis air-bearing guide can adopt the existing air-bearing guide block structure.

[0098] The air-bearing components of the machine's X, Y, and Z-axis guiding systems are all of sub-micron precision, with air-bearing gaps controlled within 6μm-8μm. The air-bearing rigidity is very high, resulting in high stability of the machine's transmission system.

[0099] In some embodiments of this application, the balance bracket 620 includes a frame body 623 and an end cap 624 detachably connected to the frame body 623, and a perforated hole 625 is provided on the balance bracket 620.

[0100] The frame body 623 is a U-shaped frame, with end caps 624 located at the front of the U-shaped frame. The front end caps 624 are removable, facilitating machine maintenance. The closed structure formed by the U-shaped frame and end caps 624 enhances the stability of the balance support 620. The perforated holes 625 on the balance support 620 reduce its own mass, resulting in higher support strength for the same mass.

[0101] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A bridge-type coordinate measuring machine, characterized in that, Including: Base; A fixed platform mounted on the base; The beam unit includes a beam and a first leg and a second leg connected to both ends of the beam; A first driving mechanism is used to drive the first leg and the second leg to move relative to the fixed platform along the Y direction; A slide carriage is slidably mounted on the crossbeam; The second drive mechanism is used to drive the carriage to move relative to the crossbeam along the X direction; Z-axis assembly, including: Z-axis components; A balance support, assembled onto the carriage, includes a top component; The third drive mechanism, mounted on the carriage and balance bracket, is used to drive the Z-axis components to move up and down. The balancing component, assembled on the Z-axis component, includes a telescopic extension member; The elastic damping unit, assembled on the top component, includes: The mounting component has an internally formed receiving and positioning part that accommodates and positions the telescopic component, and is disposed through the top component; An elastic damping assembly, disposed on at least one side of the top or bottom side of the top member, includes: The kit is fitted onto the mounting member and inserted into the top member, and includes an extension disposed circumferentially along the kit. An elastic cushioning element, fitted onto the kit, is positioned between the extension and the top member; A locking component is locked onto the mounting piece and pressed onto the extension.

2. The bridge-type coordinate measuring machine according to claim 1, characterized in that, Including: A gasket, which is fitted onto the kit, has a positioning groove on it, and the elastic buffer is arranged between the gasket and the extension and located within the positioning groove.

3. The bridge-type coordinate measuring machine according to claim 1, characterized in that, An adjustment hole is provided on the balance bracket; An eccentric adjusting component is rotatably mounted on the carriage, located inside the adjusting hole and in contact with the top wall of the adjusting hole; A guide structure, formed on the carriage and the balance support, is used to guide the balance support as it moves up and down; Locking element, used to secure the balance bracket after it has been adjusted to the correct position.

4. The bridge-type coordinate measuring machine according to claim 1, characterized in that, The base includes: an outer shell component; as well as A first support platform and a second support platform are arranged inside the outer shell component, and the first support platform and the second support platform are arranged opposite to each other. The first support member is respectively installed on the first support platform and the second support platform; The second support member is mounted on the first support platform or the second support platform, and its height relative to the first support platform or the second support platform is adjustable.

5. The bridge-type coordinate measuring machine according to claim 4, characterized in that, A door that can be opened or closed is provided on at least one side of the outer shell structure.

6. The bridge-type coordinate measuring machine according to claim 4, characterized in that, Including: Two third support members are provided, arranged at an angle. One end of the two third support members intersects and is connected to the first support platform, and the other end of the two third support members is connected to the second support platform.

7. The bridge-type coordinate measuring machine according to claim 1, characterized in that, Including: Cable fasteners are fixed to the carriage, and mounting positions for installing cables are formed above them; The cable end fastener of the drag chain has a gap with the cable fastener; A connector that connects the cable fixing component and the drag chain cable end fixing component; The elastic element is sleeved on the connector, with its two ends abutting against the cable fixing component and the cable end fixing component of the drag chain, respectively.

8. The bridge-type coordinate measuring machine according to claim 1, characterized in that, The first drive mechanism includes a first drive motor and a first belt and pulley drive mechanism that are driven by the first drive motor; the second drive mechanism includes a second drive motor and a second belt and pulley drive mechanism that are driven by the second drive motor; and the third drive mechanism includes a third drive motor and a third belt and pulley drive mechanism that are driven by the third drive motor. In the first belt and pulley transmission mechanism, the second belt and pulley transmission mechanism, and the third belt and pulley transmission mechanism, the belts are all multi-ribbed belts, and the pulleys are all multi-ribbed belt pulleys.

9. The bridge-type coordinate measuring machine according to claim 1, characterized in that, It includes an X-direction air-bearing guide on the carriage, a Y-direction air-bearing guide on the first and second legs, and a Z-direction air-bearing guide on the carriage. The air-bearing gap of the X-direction air-bearing guide, the Y-direction air-bearing guide, and the Z-direction air-bearing guide is 6μ-8μm.

10. The bridge-type coordinate measuring machine according to claim 1, characterized in that, The balance bracket includes a frame body and a detachable end cap connected to the frame body, and the balance bracket is provided with a hollow hole.

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