Auxiliary supporting mechanism for working table of three-coordinate measuring machine

Abstract

The utility model discloses a three-coordinate measuring machine workbench auxiliary supporting mechanism, which comprises a workbench, a hemispherical spherical crown, an ejector rod, a guide cylinder, a base plate, a gravity sensor, a spring, a jackscrew and a supporting seat, and is characterized in that the upper surface of the base plate is fixedly connected with the lower surface of the workbench, and the lower surface of the base plate is fixedly connected with the upper surface of the gravity sensor; the lower surface of the gravity sensor is in contact with the plane of the hemispherical spherical crown; the cambered surface of the hemispherical spherical crown is in contact with one end of the ejector rod; a conical hole is formed in one end of the ejector rod, a round counter bore is formed in the other end of the ejector rod, the end, provided with the conical hole, of the ejector rod is matched with the cambered surface of the hemispherical spherical crown, and the end, provided with the round counter bore, of the ejector rod is connected and contacted with one end of the spring; the other end of the spring is connected and contacted with one end of the jackscrew, the ejector rod is arranged at one end in the guide cylinder, the guide cylinder is provided with a circular through hole, the bottom of the guide cylinder is provided with a supporting seat, the middle of the upper surface of the supporting seat is provided with a supporting seat sinking table, and the supporting seat is provided with a threaded through hole in the central axis.

Description

Technical Field

[0001] The utility model belongs to the technical field of three-coordinate measuring machines, and in particular relates to an auxiliary supporting mechanism for a workbench of a three-coordinate measuring machine. Background Art

[0002] The worktable of a three-dimensional coordinate measuring machine usually needs to rely on three main support points to maintain stability. When the size of the worktable is small, the deformation of the part far away from the support point can be ignored due to the large rigidity of the worktable itself. However, if the main support point of the worktable is not rigid enough, or the size of the worktable is large, the deformation of the position far away from the main support point will become larger. In addition, the moving parts of the equipment during operation will also affect the worktable, resulting in the deterioration of the flatness of the working plane, further affecting the measurement accuracy of the equipment. At the same time, the stability of the support point at the bottom of the equipment will also deteriorate, affecting the safety of the equipment. Therefore, it is necessary to add an auxiliary support mechanism away from the main support. Utility Model Content

[0003] In order to solve the technical problems existing in the background technology, the utility model aims to provide an auxiliary support mechanism for a three-coordinate measuring machine workbench. The spring force is adjusted by twisting the top screw with a wrench to adjust the spring height, thereby adjusting the supporting force on the workbench, thereby playing a role of auxiliary support.

[0004] In order to solve the technical problem, the technical solution of the utility model is:

[0005] An auxiliary support mechanism for a workbench of a three-dimensional coordinate measuring machine comprises a workbench, a hemispherical crown, a push rod, a guide cylinder, a pad, a gravity sensor, a spring, a push screw, and a support seat, wherein the upper surface of the pad is fixedly connected to the lower surface of the workbench, and the lower surface of the pad is fixedly connected to the upper surface of the gravity sensor; the lower surface of the gravity sensor contacts the plane of the hemispherical crown, and the arc surface of the hemispherical crown contacts one end of the push rod;

[0006] One end of the push rod is provided with a tapered hole, and the other end of the push rod is provided with a circular countersunk hole. The end of the push rod provided with the tapered hole cooperates with the arc surface of the hemispherical crown, and the end of the push rod provided with the circular countersunk hole contacts one end of the spring; the other end of the spring contacts one end of the top screw, and the push rod is arranged at one end in the guide cylinder, and the guide cylinder is provided with a circular through hole, and the bottom of the guide cylinder is provided with a support seat, and a support seat sinking platform is provided in the middle of the support seat, and the support seat is provided with a threaded through hole on the central axis. The support seat is also provided with a small threaded hole perpendicular to the central axis, and a top screw is provided in the threaded through hole, and a set screw is provided in the small threaded hole. A cylindrical boss is provided on the outer wall of the end of the guide cylinder away from the push rod, and one end of the top screw is a small shaft, and the other end of the top screw is provided with an external thread and a hexagonal countersunk hole is provided at its end; the external thread of the top screw cooperates with the threaded through hole of the support seat.

[0007] Preferably, the upper surface of the pad is fixedly connected to the lower surface of the workbench by screws, and the lower surface of the pad is fixedly connected to the upper surface of the gravity sensor by screws.

[0008] Preferably, the push rod is cylindrical in shape, and a push rod sink is provided on the outer wall of the push rod along the circumference.

[0009] Preferably, a cylindrical boss is provided on the outer wall of the guide tube close to one end of the support seat.

[0010] Preferably, the cross-sectional shape of the support seat is π-shaped.

[0011] Preferably, the inner ring of the spring is sleeved on the top screw shaft, and the lower surface of the spring is in contact with the shoulder of the top screw shaft.

[0012] Preferably, the top screw is a stepped shaft-like component, the middle shaft diameter of the top screw is the largest, and a top screw sinking platform is arranged along the circumference of the outer wall at one end of the top screw.

[0013] Preferably, an O-ring is provided in the push rod sinker and fits tightly with the inner wall of the circular through hole in the center of the guide cylinder; an O-ring is provided in the push screw sinker and fits tightly with the inner wall of the circular through hole in the center of the guide cylinder.

[0014] Preferably, the hemispherical cap is a solid hemisphere.

[0015] Preferably, the external thread of the top screw is a fine thread.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] 1. The utility model is a three-coordinate measuring machine workbench auxiliary support mechanism that is convenient and fast and can be used in multiple groups. The utility model inserts an inner hexagon wrench into the inner hexagon countersunk hole at the end of the top screw, rotates the top screw, and adjusts the spring force to provide auxiliary support for the workbench. This auxiliary support mechanism is installed at the bottom of the workbench away from the main support. When the rigidity of the chassis is insufficient and deformation occurs, or the workbench is large and far away from the main support position, the deformation is large, and the moving parts of the equipment affect the workbench during operation, the spring force is adjusted to provide appropriate support for the workbench to ensure the accuracy of the plane on the workbench and the stability of the equipment;

[0018] 2. The utility model is a three-coordinate measuring machine workbench auxiliary support mechanism with a gravity sensor installed at the bottom of the workbench. The magnitude of the support force can be detected and displayed by the gravity sensor, making the adjustment of the auxiliary support force of the workbench more specific and accurate;

[0019] 3. The supporting force of the auxiliary supporting mechanism of the worktable of the three-dimensional coordinate measuring machine of the utility model can be adjusted, and the supporting force can be changed according to the load-bearing capacity of the worktable;

[0020] 4. The utility model provides an O-ring for the auxiliary support mechanism of the worktable of a three-coordinate measuring machine, which has a compact structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 , a schematic diagram of the structure of an auxiliary support mechanism for a worktable of a three-coordinate measuring machine according to the utility model;

[0022] Figure 2 , a left-side structural schematic diagram of an auxiliary support mechanism for a three-coordinate measuring machine worktable according to the utility model;

[0023] Figure 3 , a schematic diagram of the structure of a top rod of an auxiliary support mechanism for a worktable of a three-coordinate measuring machine according to the utility model;

[0024] Figure 4 , a schematic structural diagram of a top screw of an auxiliary support mechanism of a three-coordinate measuring machine worktable according to the utility model;

[0025] Figure 5 , a left-side structural schematic diagram of a support seat of an auxiliary support mechanism for a worktable of a three-coordinate measuring machine according to the present invention.

[0026] Reference numerals:

[0027] 1- workbench; 2- hemispherical crown; 3- ejector rod; 5- guide cylinder; 6- pad; 7- gravity sensor; 8- spring; 1010- ejector screw; 10- support seat;

[0028] 3-1-conical hole; 3-2-circular countersunk hole; 3-3-rod sinker;

[0029] 5-1-circular through hole; 5-2-cylindrical boss;

[0030] 10-1-threaded through hole; 10-2-small threaded hole; 10-3-support seat sinker;

[0031] 1020-set screw; 10100-screw countersunk platform; 10101-hexagonal countersunk hole; 10102-small shaft; 10103-external thread. DETAILED DESCRIPTION

[0032] The following describes the specific implementation of the utility model in conjunction with embodiments:

[0033] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0034] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0035] Embodiment 1:

[0036] like Figure 1-Figure 5 As shown, an auxiliary support mechanism for a worktable of a three-dimensional coordinate measuring machine includes a worktable 1, a hemispherical crown 2, a push rod 3, a guide cylinder 5, a pad 6, a gravity sensor 7, a spring 8, a push screw 1010, and a support seat 10. The upper surface of the pad 6 is fixedly connected to the lower surface of the worktable 1, and the lower surface of the pad 6 is fixedly connected to the upper surface of the gravity sensor 7; the lower surface of the gravity sensor 7 contacts the plane of the hemispherical crown 2, and the arc surface of the hemispherical crown 2 contacts one end of the push rod 3;

[0037] A conical hole 3-1 is provided at one end of the push rod 3, and a circular countersunk hole 3-2 is provided at the other end of the push rod 3. The end of the push rod 3 provided with the conical hole 3-1 cooperates with the arc surface of the hemispherical crown 2, and the end of the push rod 3 provided with the circular countersunk hole 3-2 contacts one end of the spring 8; the other end of the spring 8 contacts one end of the top wire 1010. The push rod 3 is provided at one end in the guide cylinder 5, and the guide cylinder 5 is provided with a circular through hole 5-1. A support seat 10 is provided at the bottom of the guide cylinder 5, and a support seat sinking platform 10-3 is provided in the middle of the support seat 10. The support seat 10 is provided with a thread on the central axis. Through hole 10-1, the support seat 10 is also provided with a small threaded hole 10-2 perpendicular to the central axis, a top screw 1010 is provided in the threaded through hole 10-1, and a set screw 1020 is provided in the small threaded hole 10-2. A cylindrical boss 5-2 is provided on the outer wall of the end of the guide cylinder 5 away from the push rod 3, one end of the top screw 1010 is a small shaft 10102, and the other end of the top screw 1010 is provided with an external thread 10103 and a hexagonal countersunk hole 10101 is provided at its end; the external thread 10103 of the top screw 1010 cooperates with the threaded through hole 10-1 of the support seat 10.

[0038] Preferably, the upper surface of the pad 6 is fixedly connected to the lower surface of the workbench 1 by screws, and the lower surface of the pad 6 is fixedly connected to the upper surface of the gravity sensor 7 by screws.

[0039] Preferably, the guide cylinder is an external guide for the ejector rod and the ejector screw, and provides a closed space for the internal parts.

[0040] Preferably, the shape of the push rod 3 is cylindrical, and the outer wall of the push rod 3 is also provided with a push rod sink 3-3 along the circumference.

[0041] Preferably, a cylindrical boss 5 - 2 is provided on the outer wall of the guide tube 5 at one end close to the support seat 10 .

[0042] Preferably, the cross-sectional shape of the support seat 10 is π-shaped.

[0043] Preferably, the inner ring of the spring 8 is sleeved on the small shaft 10102 of the top screw 1010, and the lower surface of the spring 8 is in contact with the shoulder of the small shaft 10102 of the top screw 1010.

[0044] Preferably, the top screw 1010 is a stepped shaft-like component, the middle shaft diameter of the top screw 1010 is the largest, and a top screw sink 10100 is arranged along the circumference of the outer wall at one end of the top screw 1010.

[0045] Preferably, an O-ring is provided inside the push rod sinking platform 3-3 and fits tightly with the inner wall of the circular through hole 5-1 at the center of the guide cylinder 5; an O-ring is provided inside the push screw sinking platform 10100 and fits tightly with the inner wall of the circular through hole 5-1 at the center of the guide cylinder 5.

[0046] There is a closed space between the two sets of O-rings, and lubricant is added to the relative motion surfaces to make the mechanism run more smoothly.

[0047] Embodiment 2:

[0048] Preferably, the hemispherical crown 2 is a solid hemisphere.

[0049] Preferably, the external thread of the top screw 1010 is a fine thread.

[0050] Working principle:

[0051] Insert the hexagonal wrench into the hexagonal countersunk hole at the end of the top screw, rotate the top screw, adjust the spring force, and provide adjustable auxiliary support force for the workbench. Adjust the end face of the front hemisphere crown to fit the gravity sensor. When adjusting, first place the electronic level in the center of the workbench, move the three-coordinate moving parts to each extreme position, observe the reading of the electronic level, and rotate the screw with a wrench. When the electronic level changes the least, it is the best state of support force, and tighten the set screws on the support seat. When multiple workbench auxiliary support mechanisms are selected, the layout must be uniform and the force must be equal.

[0052] In summary, the auxiliary support mechanism of the worktable of the three-dimensional coordinate measuring machine of the utility model has a simple structure, adjustable support force, convenient adjustment, a wide range of applications, and can be used in multiple groups at the same time according to the distribution of the main supports at the bottom of the worktable and the size of the worktable.

[0053] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

[0054] Many other changes and modifications can be made without departing from the concept and scope of the utility model. It should be understood that the utility model is not limited to a specific embodiment, and the scope of the utility model is defined by the appended claims.

Claims

1. A three-coordinate measuring machine worktable auxiliary support mechanism, characterized in that: The device comprises a workbench (1), a hemispherical crown (2), a push rod (3), a guide cylinder (5), a pad (6), a gravity sensor (7), a spring (8), a push screw (1010), and a support seat (10); the upper surface of the pad (6) is fixedly connected to the lower surface of the workbench (1); the lower surface of the pad (6) is fixedly connected to the upper surface of the gravity sensor (7); the lower surface of the gravity sensor (7) is in contact with the plane of the hemispherical crown (2); and the arc surface of the hemispherical crown (2) is in contact with one end of the push rod (3); A conical hole (3-1) is provided at one end of the push rod (3), and a circular countersunk hole (3-2) is provided at the other end of the push rod (3). The end of the push rod (3) provided with the conical hole (3-1) cooperates with the arc surface of the hemispherical crown (2), and the end of the push rod (3) provided with the circular countersunk hole (3-2) contacts one end of the spring (8); the other end of the spring (8) contacts one end of the push wire (1010), one end of the push rod (3) is arranged in the guide tube (5), the guide tube (5) is provided with a circular through hole (5-1), a support seat (10) is provided at the bottom of the guide tube (5), a support seat sinking platform (10-3) is provided in the middle of the support seat (10), and the support seat (10) is provided with a support seat sinking platform (10-3). The support seat (10) is provided with a threaded through hole (10-1) on the central axis, and the support seat (10) is also provided with a small threaded hole (10-2) perpendicular to the central axis, a top screw (1010) is provided in the threaded through hole (10-1), a set screw (1020) is provided in the small threaded hole (10-2), one end of the top screw (1010) is a small shaft (10102), the other end of the top screw (1010) is provided with an external thread (10103) and a hexagonal countersunk hole (10101) is provided at its end; the external thread (10103) of the top screw (1010) and the threaded through hole (10-1) of the support seat (10) cooperate with each other.

2. The auxiliary support mechanism for a coordinate measuring machine worktable according to claim 1, characterized in that: The upper surface of the pad (6) is fixedly connected to the lower surface of the workbench (1) via screws, and the lower surface of the pad (6) is fixedly connected to the upper surface of the gravity sensor (7) via screws.

3. The auxiliary support mechanism for a coordinate measuring machine worktable according to claim 1, characterized in that: The push rod (3) is cylindrical in shape, and a push rod sink (3-3) is provided on the outer wall of the push rod (3) along the circumference.

4. The auxiliary support mechanism for a coordinate measuring machine worktable according to claim 1, characterized in that: A cylindrical boss (5-2) is provided on the outer wall of one end of the guide cylinder (5) close to the support seat (10).

5. The auxiliary support mechanism for a coordinate measuring machine worktable according to claim 1, characterized in that: The cross-sectional shape of the support seat (10) is π-shaped.

6. The auxiliary support mechanism for a coordinate measuring machine worktable according to claim 1, characterized in that: The inner ring of the spring (8) is sleeved on the small shaft (10102) of the top screw (1010), and the lower surface of the spring (8) is in contact with the shoulder on the side of the small shaft (10102) of the top screw (1010).

7. The auxiliary support mechanism for a coordinate measuring machine worktable according to claim 1, characterized in that: The top screw (1010) is a stepped shaft-like component, the middle shaft diameter of the top screw (1010) is the largest, and a top screw sinking platform (10100) is arranged along the circumference of the outer wall of the middle shaft diameter of the top screw (1010).

8. The auxiliary support mechanism for a coordinate measuring machine worktable according to claim 7, characterized in that: The top screw sinking platform (10100) is provided with an O-shaped sealing ring and is tightly fitted with the inner wall of the circular through hole (5-1) at the center of the guide cylinder (5); the top rod sinking platform (3-3) is provided with an O-shaped sealing ring and is tightly fitted with the inner wall of the circular through hole (5-1) at the center of the guide cylinder (5).

9. The auxiliary support mechanism for a coordinate measuring machine worktable according to claim 1, characterized in that: The hemispherical crown (2) is a solid hemisphere.

10. The auxiliary support mechanism for a coordinate measuring machine worktable according to claim 1, characterized in that: The external thread (10103) of the top screw (1010) is a fine pitch thread.

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