Flexible counting device of air floating type gantry crane

Abstract

The utility model discloses an air floating type gantry crane flexible counting device which comprises a flexible counting structure, the flexible counting structure comprises a connecting piece, the connecting piece is connected to an auxiliary shoulder, the bottom of the connecting piece is connected with a counting piece and two air floating flexible pieces, and the counting piece is located between the two air floating flexible pieces; the air floating flexible part comprises an air floating block, a supporting rod and an anti-falling cap, one end of the anti-falling cap is clamped on the air floating block, and the other end of the anti-falling cap is clamped on the supporting rod; the end part of the supporting rod is connected with a steel ball, and a ball socket is arranged on the air floating block; and the steel ball extends into the anti-falling cap and can rotate in the ball socket. The flexible counting device of the air floating type gantry machine has the advantages that the structure is simple, the flexible counting structure moves stably relative to the grating ruler, the detection speed is high, the detection precision is high, the service life is long, the manufacturing cost is low, the manufacturability is good, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of gantry machines, in particular to a flexible counting device for an air-floating gantry machine. Background Art

[0002] With the development of current industrial manufacturing technology, large-span gantry CMMs have been used more and more widely. This type of gantry often uses a dual-drive, dual-grating counting system to further ensure the measurement accuracy of the machine. The use of dual drives plus an extra-long span in the crossbeam direction (X direction) will inevitably lead to problems such as non-parallelism of the main and auxiliary guides, asynchronous main and auxiliary drives, and hysteresis of the crossbeam deflection. The counting system in the CMM includes a grating ruler and a reading head. The gap between the grating ruler and the reading head is required to be very small, usually between 0.15-0.2mm, to meet the counting requirements.

[0003] The existing counting system is usually rigidly connected. There are problems such as motion error, drive asynchrony and yaw hysteresis during the operation of the machine, which leads to the gap between the grating scale and the reading head not meeting the requirements, causing machine errors or counting system errors, and ultimately causing the machine to fail to operate normally. Therefore, it is necessary to develop a new counting system to meet the requirements of stable machine operation and measurement accuracy. Summary of the invention

[0004] The utility model aims to provide an air-floating gantry machine flexible counting device, which has the advantages of simple structure, stable movement of the flexible counting structure relative to the grating ruler, fast detection speed, high detection accuracy, long service life, low manufacturing cost and good processability.

[0005] To this end, the utility model provides an air-floating gantry machine flexible counting device, including a grating ruler seat with a grating guide rail, and a grating ruler installed on the grating ruler seat, wherein a secondary shoulder is provided above the grating guide rail; further comprising: a flexible counting structure, including a connecting piece, wherein the connecting piece is connected to the secondary shoulder, wherein a counting piece and two air-floating flexible pieces are connected to the bottom of the connecting piece, wherein the counting piece is located between the two air-floating flexible pieces; wherein the air-floating flexible piece includes an air-floating block, a support rod and an anti-slip cap, wherein one end of the anti-slip cap is clamped on the air-floating block and the other end is clamped on the support rod; wherein a steel ball is connected to the end of the support rod, wherein a ball socket is provided on the air-floating block; wherein the steel ball extends into the anti-slip cap and can rotate in the ball socket.

[0006] Preferably, the connecting member is connected to a limiting frame, the limiting frame is U-shaped, the air floating block is located in the U-shaped opening of the limiting frame, and the limiting frame is used to limit the air floating block.

[0007] Preferably, an opening and an opening groove are provided on the side wall of the anti-drop cap.

[0008] Preferably, the anti-drop cap is in the shape of a hollow cone with openings at both ends, and one end of the anti-drop cap is an opening with a small aperture, and the small aperture opening is engaged with the support rod.

[0009] Preferably, the other end opening of the anti-drop cap is a large-diameter opening, and the air flotation block is provided with a snap-fit ​​groove, and the large-diameter opening end is snap-fitted into the snap-fit ​​groove.

[0010] Preferably, the connecting member comprises an upper connecting plate and a lower connecting plate which are arranged in parallel and at intervals, and two spring plates which are arranged in parallel, at intervals and vertically are connected between the upper connecting plate and the lower connecting plate.

[0011] Preferably, the two air-floating flexible members are respectively installed at two ends of the lower connecting plate.

[0012] Preferably, a mounting plate is provided at the bottom of the lower connecting plate, and the counting member is mounted on the mounting plate.

[0013] Preferably, it further comprises a protection device, which comprises a rotatable protection wheel installed at the bottom of the auxiliary shoulder, and the axial direction of the protection wheel is perpendicular to the length direction of the gantry machine guide rail.

[0014] Preferably, a protective plate is connected to the secondary shoulder, a mounting seat is mounted on the protective plate, and the protective wheel is rotatably mounted on the mounting seat.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are as follows: the utility model provides an air-floating gantry machine flexible counting device, including a grating ruler seat with a grating guide rail, and a grating ruler installed on the grating ruler seat, and a secondary shoulder is provided above the grating guide rail; it also includes: a flexible counting structure, including a connecting piece, the connecting piece is connected to the secondary shoulder, the bottom of the connecting piece is connected with a counting piece and two air-floating flexible pieces, and the counting piece is located between the two air-floating flexible pieces; the air-floating flexible piece includes an air-floating block, a support rod and an anti-drop cap, one end of the anti-drop cap is clamped on the air-floating block, and the other end is clamped on the support rod; the end of the support rod is connected with a steel ball, and a ball socket is provided on the air-floating block; the steel ball extends into the anti-drop cap and can rotate in the ball socket. The air-floating gantry machine flexible counting device of the utility model has the advantages of simple structure, stable movement of the flexible counting structure relative to the grating ruler, fast detection speed, high detection accuracy, long service life, low manufacturing cost, good processability, etc.

[0016] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a structural schematic diagram of an embodiment of the utility model of the flexible counting device of the air-floating gantry machine;

[0018] Figure 2 yes Figure 1 Enlarged view of part A;

[0019] Figure 3 It is a partial structural side view of an embodiment of the flexible counting structure of the utility model;

[0020] Figure 4 It is a partial structural schematic diagram of an embodiment of the flexible counting structure of the utility model;

[0021] Figure 5 It is a partial structural schematic diagram of an embodiment of the flexible counting structure of the utility model;

[0022] Figure 6 It is a partial structural schematic diagram of an embodiment of the flexible counting structure of the utility model;

[0023] Figure 7 It is a structural schematic diagram of an embodiment of the anti-drop cap of the utility model;

[0024] Figure 8 It is a structural schematic diagram of an embodiment of the air flotation block of the utility model;

[0025] Fig. 9 It is a structural schematic diagram of an embodiment of a support rod of the utility model;

[0026] Fig.10 It is a structural schematic diagram of an embodiment of the protection device of the utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] The air-floating gantry machine flexible counting device of the utility model can be applied to measuring machines, such as large-span gantry three-coordinate measuring machines.

[0029] like Figure 1-Figure 10 As shown, the air-floating gantry machine flexible counting device of the utility model comprises a grating scale seat with a grating guide rail 200 and a grating scale 201 mounted on the grating scale seat, and a secondary shoulder 100 is provided above the grating guide rail 200.

[0030] The utility model of the air-floating gantry machine flexible counting device also includes a flexible counting structure, which includes a connecting piece, which is connected to the auxiliary shoulder 100, and the bottom of the connecting piece is connected with a counting piece and two air-floating flexible pieces, and the counting piece is located between the two air-floating flexible pieces; the air-floating flexible piece includes an air-floating block 10, a support rod 20 and an anti-dropping cap 30, and the anti-dropping cap 30 is a hollow cone with openings at both ends, one end of the anti-dropping cap 30 is clamped on the air-floating block 10, and the other end is clamped on the support rod 30; the end of the support rod 30 is connected with a steel ball 31, and the air-floating block 10 is provided with a ball socket 11; the steel ball 31 extends into the anti-dropping cap 20 and can rotate in the ball socket 11.

[0031] Compared with the linear grating ruler in the prior art, the air-floating gantry machine flexible counting device of the utility model has the advantages of simple structure, stable movement of the flexible counting structure relative to the grating ruler, fast detection speed, high detection accuracy, long service life, low manufacturing cost and good processability.

[0032] In the utility model, the air-floating flexible member can make the flexible counting structure run smoothly and effectively relative to the grating ruler, thereby improving the detection accuracy of the counting member. The counting member is located between two air-floating flexible members, so that the counting member can be evenly stressed and run smoothly, thereby improving the detection accuracy and effectively protecting the counting member.

[0033] In the utility model, the steel ball 31 can rotate in the ball socket 11, so that the air-floating block 10 can move relative to the support rod 30, so as to realize the flexible connection of the air-floating block 10 and avoid the rigid restriction of the air-floating block 10 by the support rod 30; during operation, when the air-floating block 10 is subjected to the air pressure, it will adjust itself relative to the support rod 30, so that the air-floating block 10 can automatically adapt to the air pressure change, so that the flexible counting structure can operate smoothly.

[0034] In the present invention, a steel ball groove is provided at the end of the support rod 30, and the steel ball 31 is fixed in the steel ball groove. The fixing method can be a common method in the technical field, and no specific limitation is made here. For example, the steel ball 31 can be fixed in the steel ball groove by adhesive, or the steel ball 31 can be fixed in the steel ball groove by screws.

[0035] The connecting member includes an upper connecting plate 41 and a lower connecting plate 42 which are arranged in parallel and at intervals. The upper connecting plate 41 and the lower connecting plate 42 are both arranged transversely. Two spring plates 40 which are arranged in parallel, at intervals and vertically are connected between the upper connecting plate 41 and the lower connecting plate 42 .

[0036] The spring piece 40 is elastic and can be bent and deformed, so as to realize the flexible connection of the flexible counting structure on the auxiliary shoulder 100, play a buffering and protective role for the flexible counting structure, reduce the swing amplitude of the flexible counting structure during movement, and enable the flexible counting structure to achieve smooth operation relative to the grating guide rail 200 and the grating scale 201, thereby improving the detection speed and detection accuracy.

[0037] When the flexible counting structure moves along the grating guide rail 200, the two springs 40 have a certain elastic force in the vertical direction. Therefore, when moving, the two springs 40 can absorb vibrations and reduce the swing amplitude of the flexible counting structure during movement, so that the flexible counting structure can run smoothly.

[0038] The upper connecting plate 41 is connected to the auxiliary shoulder 100 through an L-shaped support plate. The L-shaped support plate is an integral piece and includes a vertical support plate 43 and a horizontal support plate 44 that are perpendicular to each other. The vertical support plate 43 is connected and fixed to the auxiliary shoulder 100, and the horizontal support plate 44 and the upper connecting plate 41 are connected and fixed in a fit. The connection and fixing method can be a common connection method in the technical field, for example, it can be a bolt connection, and no specific limitation is made here.

[0039] A mounting plate 49 is provided at the bottom of the lower connecting plate 42, and the counting member is mounted on the mounting plate 49. The counting member includes an optical sensor and a probe. The optical sensor can detect the position of light reflected from the surface of the measured object, and the probe can sense the change of the surface of the object and provide corresponding readings. The optical sensor and the probe are both common optical sensors and probes in the technical field, and are not specifically limited here.

[0040] Two air-floating flexible parts are respectively installed at the two ends of the lower connecting plate 42, wherein the axial direction of the support rod 20 is perpendicular to the length direction of the lower connecting plate 42, and a threaded hole 45 is provided on the lower connecting plate 42, and the support rod 20 passes through the threaded hole 45, and a nut 48 is connected to the support rod 20, and the nut 48 abuts against the lower connecting plate 42, thereby connecting and fixing the support rod 20 to the lower connecting plate 42.

[0041] The lower connecting plate 42 is connected to a limit frame, which is a U-shaped integrated part, and the air flotation block 10 is located in the U-shaped opening of the limit frame. Specifically, the limit frame 40 includes a first limit plate 46, and two second limit plates 47 are vertically arranged at both ends of the first limit plate 46; wherein, the first limit plate 46 is connected and fixed to the lower connecting plate 42, and the two second limit plates 47 both extend toward the air flotation block 10, and the air flotation block 10 is located between the two second limit plates 47; thereby, the air flotation block 10 can be restricted, and the air flotation block 10 can be prevented from being twisted and deflected too much under the action of air pressure, and the air flotation block 10 can be prevented from interfering and colliding with other components, thereby playing an effective protective role.

[0042] One end opening of the anti-drop cap 20 is a small-diameter opening, and the small-diameter opening is clamped and sleeved on the support rod 30 .

[0043] The other end of the anti-drop cap 20 is opened with a large aperture. The air flotation block 10 is provided with a snap-fit ​​groove 11 . The large aperture opening end is snap-fitted into the snap-fit ​​groove 12 , so that the anti-drop cap 20 can be snap-fitted and fixed on the air flotation block 10 .

[0044] In summary, the small-aperture opening of the anti-slip cap 20 is snap-fitted onto the support rod 30, and the large-aperture opening is snap-fitted and fixed onto the flotation block 10, so that a reliable and effective connection between the support rod 30 and the flotation block 10 is achieved through the anti-slip cap 20, and assembly and disassembly are easy to achieve.

[0045] The steel ball 31 extends into the anti-dropping cap 20 , and the anti-dropping cap 20 can also protect the steel ball 31 .

[0046] The card and groove 12 are annular, and the ball socket 11 is located at the center of the card and groove 12. The ball socket 11 is adapted to the steel ball 31, and the steel ball 31 can be rotatably fitted in the ball socket 11.

[0047] The side wall of the anti-drop cap 20 is provided with an opening 21 and an opening groove 22, the opening 21 extends from the small aperture opening of the anti-drop cap to the large aperture opening, and the opening groove 22 extends from the small aperture opening of the anti-drop cap to the large aperture opening (the opening groove 22 does not extend to the large aperture opening). By providing the opening 21 and the opening groove 22 on the side wall of the anti-drop cap 20, it is convenient to squeeze and deform the anti-drop cap 20, so that the anti-drop cap 20 can be easily clamped and fixed on the air flotation block 10 and the support rod 20.

[0048] like Figure 2 and Fig. 9 As shown, the air-floating gantry machine flexible counting device of the utility model further includes two protection devices, and the two protection devices are respectively installed at the two ends of the auxiliary shoulder 100.

[0049] The protection device includes a rotatable protection wheel 51 installed at the bottom of the auxiliary shoulder 100, and the axial direction of the protection wheel 51 is perpendicular to the length direction of the grating guide rail 200. A protection plate 52 is connected to the auxiliary shoulder 100, and a mounting seat 53 is installed on the protection plate 52. The protection wheel 51 is rotatably installed on the mounting seat 53.

[0050] Specifically, an L-shaped auxiliary shoulder plate 101 is extended from the bottom of the auxiliary shoulder 100, and the protective plate 52 is L-shaped. The protective plate 52 is matched and connected with the auxiliary shoulder plate 101, wherein an adjustment spacer 54 is provided between the vertical part of the protective plate 52 and the vertical part of the auxiliary shoulder plate 101. By adjusting and replacing the adjustment spacers 54 with different thicknesses, the distance between the protective plate 52 and the grating guide rail 200 can be adjusted, thereby adjusting the distance L between the protection wheel 51 and the grating guide rail 200.

[0051] If the gantry machine moves too much, the protection wheel 51 will collide with the grating guide rail 200, and the gantry machine's control system will automatically detect it. The control system will control the gantry machine's motor to stop running, causing the gantry machine to stop running, thereby protecting the gantry machine and the counting structure, and effectively improving the safety and stability of the gantry machine's operation.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A flexible counting device for an air-floating gantry machine, comprising a grating ruler seat with a grating guide rail, and a grating ruler mounted on the grating ruler seat, wherein a secondary shoulder is provided above the grating guide rail; characterized in that: Also includes: The flexible counting structure comprises a connecting piece, wherein the connecting piece is connected to the secondary shoulder, a counting piece and two air-floating flexible pieces are connected to the bottom of the connecting piece, and the counting piece is located between the two air-floating flexible pieces; The air-floating flexible member includes an air-floating block, a support rod and an anti-drop cap. One end of the anti-drop cap is clamped on the air flotation block, and the other end is clamped on the support rod; The end of the support rod is connected with a steel ball, and the air flotation block is provided with a ball socket; the steel ball extends into the anti-drop cap and can rotate in the ball socket.

2. The flexible counting device for an air-floating gantry machine as claimed in claim 1, characterized in that: The connecting member is connected to a limiting frame, the limiting frame is U-shaped, the air floating block is located in the U-shaped opening of the limiting frame, and the limiting frame is used to limit the air floating block.

3. The flexible counting device for an air-floating gantry machine as claimed in claim 1, characterized in that: An opening and an opening groove are arranged on the side wall of the anti-dropping cap.

4. The flexible counting device for an air-floating gantry machine as claimed in claim 1, characterized in that: The anti-drop cap is in the shape of a hollow cone with openings at both ends. One end of the anti-drop cap is an opening with a small aperture, and the opening with a small aperture is engaged with the support rod.

5. The flexible counting device for an air-floating gantry machine as claimed in claim 4, characterized in that: The other end opening of the anti-drop cap is a large-diameter opening, and the air flotation block is provided with a clamping groove, and the large-diameter opening end is clamped in the clamping groove.

6. The flexible counting device for an air-floating gantry machine as claimed in claim 1, characterized in that: The connecting member comprises an upper connecting plate and a lower connecting plate which are arranged in parallel and at intervals, and two spring plates which are arranged in parallel, at intervals and vertically are connected between the upper connecting plate and the lower connecting plate.

7. The flexible counting device for an air-floating gantry machine as claimed in claim 6, characterized in that: The two air-floating flexible members are respectively installed at two ends of the lower connecting plate.

8. The flexible counting device for an air-floating gantry machine as claimed in claim 6, characterized in that: A mounting plate is provided at the bottom of the lower connecting plate, and the counting member is mounted on the mounting plate.

9. The flexible counting device for an air-floating gantry machine as claimed in claim 1, characterized in that: It also includes a protection device, which includes a rotatable protection wheel installed at the bottom of the auxiliary shoulder, and the axial direction of the protection wheel is perpendicular to the length direction of the gantry machine guide rail.

10. The flexible counting device for an air-floating gantry machine as claimed in claim 9, characterized in that: The secondary shoulder is connected with a protection plate, a mounting seat is mounted on the protection plate, and the protection wheel is rotatably mounted on the mounting seat.

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