Three-coordinate measuring clamp

Abstract

The utility model belongs to the technical field of measuring fixtures, and particularly relates to a three-coordinate measuring fixture, which comprises a base, an upright post arranged on the surface of the base, and an adjusting assembly arranged in a cavity in the base, the adjusting assembly comprises two moving plates inserted into the base and a positioning seat fixedly connected to the inner wall face of the base, the two moving plates are slidably connected with the base, the bottom face of one moving plate is fixedly connected with a rectangular plate, the surface of the rectangular plate is in threaded connection with a first screw rod, and the first screw rod is in threaded connection with the bottom face of the base. The first screw rod is rotationally connected with the positioning seat through a first bearing, and the surface of the positioning seat is fixedly connected with a positioning shaft; according to the clamping device, the distance between the stand columns can be conveniently adjusted according to the sizes of workpieces, the workpieces of various sizes can be clamped, the application range is wide, the adjusting positions of the stand columns can be conveniently limited, and the stability in the using process is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring fixtures, and in particular relates to a three-coordinate measuring fixture. Background Art

[0002] Three-coordinate measurement has been widely used in various sectors such as machinery manufacturing, automobile industry, electronics industry, aerospace industry and defense industry, and has become an indispensable measuring device for modern industrial inspection and quality control. The sectors and industries involved are very wide. In terms of application scope, three-coordinate measurement also basically covers mechanical parts and electronic components and various shape tolerances and position tolerances. When performing three-coordinate measurement, a fixture device is required to clamp and fix the workpiece before measurement can be performed.

[0003] After checking, the public (announcement) number CN215676926U discloses a three-coordinate measurement fixture for a sensor positioning seat. The design discloses "the bottom plate is installed with the first column, the second column, the third column and the fourth column by fastening screws, the first column, the second column and the fourth column are respectively installed with the upper cover plate by upper cover plate screws, the upper cover is installed with locking screws, the first column and the second column are respectively installed with two positioning blocks by positioning block screws, the fourth column is installed with one positioning block by positioning block screws, and the fourth column is installed with one locking screw, etc., which has the technical effects of ensuring that all geometric accuracy items can be measured in one clamping, avoiding secondary clamping, ensuring measurement efficiency, and repeating clamping with high positioning accuracy when measuring batch parts, avoiding needle and rod collision, ensuring measurement accuracy and safety, etc.";

[0004] However, when the measuring fixture is used, since the relative position between the first column and the fourth column is fixed and cannot be adjusted, this fixture can only be used to clamp workpieces whose size is smaller than the distance between the first column and the fourth column. When the workpiece is larger than the distance between the first column and the fourth column, this fixture cannot be used for fixing;

[0005] Therefore, a three-coordinate measurement fixture is designed to solve the above problems. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a three-coordinate measuring fixture, which has the characteristics of being able to clamp workpieces of various sizes and having a wide range of uses.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a three-coordinate measuring fixture, comprising a base and a column mounted on the surface of the base, and also comprising an adjustment component arranged in the inner cavity of the base;

[0008] The adjusting assembly includes two movable plates inserted into the base and a positioning seat fixedly connected to the inner wall of the base, the two movable plates are slidably connected to the base, the bottom surface of one of the movable plates is fixedly connected to a rectangular plate, the surface of the rectangular plate is threadedly connected to a first screw, the first screw is rotatably connected to the positioning seat through a first bearing, the surface of the positioning seat is fixedly connected to a positioning shaft, the surface of the positioning shaft is rotatably sleeved with a rotating plate, the rotating plate is rotatably connected to the two movable plates with connecting rods respectively, the surface of the movable plate is also fixedly connected to a limiting slider, the limiting slider is slidably connected to the base, and the limiting slider is fixedly connected to the column.

[0009] As a preferred three-coordinate measuring fixture of the utility model, one end of the first screw rod passes through the base, extends to the outside of the base, and is fixedly connected to a hand wheel arranged on the outside of the base.

[0010] As a preferred three-coordinate measuring fixture of the utility model, the surface of the rotating plate is symmetrically fixedly connected with a first rotating shaft, the surface of each of the movable plates is fixedly connected with a second rotating shaft, and the first rotating shaft and the second rotating shaft are respectively rotatably connected to the connecting rod.

[0011] As a preferred three-coordinate measuring fixture of the utility model, positioning rods are symmetrically inserted inside the base, the positioning rods and the base are fixedly connected, and the bottom surface of the movable plate is symmetrically fixedly connected with a sliding sleeve, and the sliding sleeve is slidably sleeved on the surface of the positioning rod.

[0012] As a preferred three-coordinate measuring fixture of the utility model, the positioning rods are respectively inserted into the surfaces of the rectangular plate and the positioning seat, the rectangular plate and the positioning rods are slidably connected, and the positioning seat and the positioning rods are fixedly connected.

[0013] As a preferred three-coordinate measuring fixture of the utility model, it also includes a limit assembly arranged between the base and the hand wheel;

[0014] The limiting assembly includes a ratchet fixedly sleeved on the surface of the first screw and a pin fixedly connected to the surface of the base. A pawl is rotatably sleeved on the surface of the pin, and the pawl is spanned between the teeth of the ratchet.

[0015] As a preferred three-coordinate measuring fixture of the utility model, a toggle rod is fixedly connected to the surface of the pawl.

[0016] Compared with the prior art, the beneficial effects of the utility model are: adding an adjustment component to the present application is conducive to adjusting the spacing between the columns according to the size of the workpiece, and can clamp workpieces of various sizes, with a wide range of uses. At the same time, adding a limit component is conducive to limiting the adjustment position of the column and ensuring stability during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 2 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0020] Figure 3 It is an internal cross-sectional view of the base in the utility model;

[0021] Figure 4 The connection structure of the adjustment component in the utility model Figure 1 ;

[0022] Figure 5 The connection structure of the adjustment component in the utility model Figure 2 ;

[0023] Figure 6 This is a connection structure diagram of the limit assembly in the utility model;

[0024] In the figure:

[0025] 1. Base; 2. Column;

[0026] 4. Adjustment assembly; 41. Positioning rod; 42. Positioning seat; 43. Sliding sleeve; 44. Moving plate; 45. Rectangular plate; 46. First screw; 47. Hand wheel; 48. Positioning shaft; 49. Rotating plate; 410. First rotating shaft; 411. Second rotating shaft; 412. Connecting rod; 413. Limiting slider; 5. Limiting assembly; 51. Ratchet; 52. Pin; 53. Paw; 54. Toggle rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Example 1

[0029] like Figures 1 to 6 As shown;

[0030] A three-coordinate measuring fixture comprises a base 1 and a column 2 installed on the surface of the base 1.

[0031] In this implementation scheme: the existing device disclosure (announcement) number CN215676926U discloses a three-coordinate measurement special fixture for a sensor positioning seat. This patent discloses the three-coordinate measurement fixture proposed in the present application document. The column 2 in the present application document adopts the same means in this prior art. This technical means is not described one by one here. This application makes further improvements on the existing fixture. For details, please refer to the disclosed technology below; to solve the technical problems existing in this prior art, as disclosed in the background technology above, "when using the measuring fixture, since the relative position between the first column and the fourth column is fixed and cannot be adjusted, this type of fixture can only clamp workpieces whose size is smaller than the distance between the first column and the fourth column. When the workpiece is larger than the distance between the first column and the fourth column, this type of fixture cannot be used for fixing". In terms of combined use, this problem is obviously a real problem that exists and is relatively difficult to solve. In view of this, in order to solve this technical problem, an adjustment component 4 and a limit component 5 are added to the present application document.

[0032] It should be noted that all components contained inside and outside the column 2 have been disclosed by publication number CN215676926U. Its working principle and workflow can be referred to publication number CN215676926U, and will not be described in detail here.

[0033] More specifically:

[0034] In combination with the above content: the adjustment component 4 includes two movable plates 44 inserted into the inside of the base 1 and a positioning seat 42 fixedly connected to the inner wall of the base 1, the two movable plates 44 are slidably connected to the base 1, the bottom surface of one of the movable plates 44 is fixedly connected with a rectangular plate 45, the surface of the rectangular plate 45 is threadedly connected with a first screw 46, the first screw 46 is rotatably connected to the positioning seat 42 through a first bearing, the surface of the positioning seat 42 is fixedly connected with a positioning shaft 48, the surface of the positioning shaft 48 is rotatably sleeved with a rotating plate 49, the rotating plate 49 is rotatably connected to the two movable plates 44 with a connecting rod 412, the surface of the movable plate 44 is also fixedly connected with a limiting slider 413, the limiting slider 413 is slidably connected to the base 1, and the limiting slider 413 is fixedly connected to the column 2.

[0035] The surface of the rotating plate 49 is symmetrically fixedly connected with a first rotating shaft 410 , and the surface of each movable plate 44 is fixedly connected with a second rotating shaft 411 . The first rotating shaft 410 and the second rotating shaft 411 are rotatably connected to a connecting rod 412 , respectively.

[0036] A positioning rod 41 is symmetrically inserted inside the base 1 , and the positioning rod 41 is fixedly connected to the base 1 . A sliding sleeve 43 is symmetrically fixedly connected to the bottom surface of the movable plate 44 , and the sliding sleeve 43 is slidably sleeved on the surface of the positioning rod 41 .

[0037] The positioning rod 41 is inserted into the surface of the rectangular plate 45 and the positioning seat 42 respectively. The rectangular plate 45 and the positioning rod 41 are slidably connected, and the positioning seat 42 and the positioning rod 41 are fixedly connected.

[0038] In this embodiment: when using this measuring fixture to clamp the workpiece, first adjust the spacing between the columns 2 according to the actual size of the workpiece. During the adjustment, the user rotates the first screw 46, and the first screw 46 rotates on the surface of the positioning seat 42, thereby driving the rectangular plate 45 to move on the surface of the first screw 46. The rectangular plate 45 moves and then drives one of the movable plates 44 to slide on the surface of the positioning rod 41 through the sliding sleeve 43. The movable plate 44 moves and then drives the rotating plate 49 to rotate around the positioning axis 48 through the cooperation of the first rotating shaft 410, the second rotating shaft 411 and the connecting rod 412. The rotating plate 49 rotates and then drives the other movable plate 44 to slide on the surface of the positioning rod 41 through the connecting rod 412, so that the column 2 can be driven to move on the surface of the base 1 through the limit slider 413, so that the spacing between the columns 2 can be adjusted according to the size of the workpiece. After adjustment, the workpiece can be fixed between the columns 2 (the specific fixing process has been disclosed by the publication number CN215676926U), and then the workpiece can be measured.

[0039] It should be noted that: a rectangular groove is provided on the surface of the base 1 , and the limiting slider 413 is inserted into the rectangular groove and is slidably connected to the base 1 .

[0040] In an optional embodiment, one end of the first screw rod 46 passes through the base 1 , extends to the outside of the base 1 , and is fixedly connected to a hand wheel 47 disposed on the outside of the base 1 .

[0041] In this embodiment, when in use, the first screw rod 46 is rotated by the hand wheel 47 .

[0042] It should be noted that the surface of the hand wheel 47 is provided with anti-skid grooves to prevent the hand from slipping when in use.

[0043] In an optional embodiment, it further includes a limit assembly 5 disposed between the base 1 and the hand wheel 47;

[0044] The limiting assembly 5 includes a ratchet 51 fixedly sleeved on the surface of the first screw rod 46 and a pin 52 fixedly connected to the surface of the base 1 . A pawl 53 is rotatably sleeved on the surface of the pin 52 . The pawl 53 is mounted between the teeth of the ratchet 51 .

[0045] In this embodiment, the ratchet 51 and the pawl 53 cooperate to limit the rotation position of the first screw 46, thereby preventing the first screw 46 from rotating during use.

[0046] In an optional embodiment, a toggle rod 54 is fixedly connected to the surface of the pawl 53 .

[0047] In this embodiment, by providing a toggle rod 54 , the restriction of the ratchet wheel 51 by the pawl 53 can be released, so that the first screw rod 46 can be reversed conveniently.

[0048] Working principle: When using this measuring fixture to clamp a workpiece, first adjust the spacing between the columns 2 according to the actual size of the workpiece. When adjusting, the user rotates the first screw 46, and the first screw 46 rotates on the surface of the positioning seat 42, thereby driving the rectangular plate 45 to move on the surface of the first screw 46. The rectangular plate 45 moves and then drives one of the moving plates 44 to slide on the surface of the positioning rod 41 through the sliding sleeve 43. The moving plate 44 moves and then drives the rotating plate 49 to rotate around the positioning shaft 48 through the cooperation of the first rotating shaft 410, the second rotating shaft 411 and the connecting rod 412. The rotating plate 49 rotates and then drives the connecting rod 412 to rotate around the positioning shaft 48. The rod 412 drives another movable plate 44 to slide on the surface of the positioning rod 41, so that the column 2 can be driven to move on the surface of the base 1 through the limit slider 413, so that the spacing between the columns 2 can be adjusted according to the size of the workpiece. After adjustment, the workpiece can be fixed between the columns 2 (the specific fixing process has been disclosed by the publication number CN215676926U), and then the workpiece can be measured, and the rotation position of the first screw 46 can be limited by the cooperation of the ratchet 51 and the pawl 53 to avoid the first screw 46 from rotating during use, thereby improving the stability of the workpiece clamping process.

[0049] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A three-coordinate measuring fixture, comprising a base (1) and a column (2) mounted on the surface of the base (1), characterized in that: It also includes an adjustment component (4) arranged in the inner cavity of the base (1); The adjustment assembly (4) comprises two movable plates (44) inserted into the base (1) and a positioning seat (42) fixedly connected to the inner wall surface of the base (1); the two movable plates (44) are slidably connected to the base (1); the bottom surface of one of the movable plates (44) is fixedly connected to a rectangular plate (45); the surface of the rectangular plate (45) is threadedly connected to a first screw rod (46); the first screw rod (46) is rotatably connected to the positioning seat (42) through a first bearing; the surface of the positioning seat (42) is fixedly connected to a positioning shaft (48); the surface of the positioning shaft (48) is rotatably sleeved with a rotating plate (49); the rotating plate (49) is rotatably connected to the two movable plates (44) with a connecting rod (412); the surface of the movable plate (44) is also fixedly connected to a limiting slider (413); the limiting slider (413) is slidably connected to the base (1); and the limiting slider (413) is fixedly connected to the column (2).

2. The three-coordinate measuring fixture according to claim 1, characterized in that: One end of the first screw rod (46) passes through the base (1), extends to the outside of the base (1), and is fixedly connected to a hand wheel (47) arranged on the outside of the base (1).

3. The three-coordinate measuring fixture according to claim 1, characterized in that: The surface of the rotating plate (49) is symmetrically fixedly connected with a first rotating shaft (410), and the surface of each of the movable plates (44) is fixedly connected with a second rotating shaft (411), and the first rotating shaft (410) and the second rotating shaft (411) are respectively rotatably connected to the connecting rod (412).

4. The three-coordinate measuring fixture according to claim 1, characterized in that: A positioning rod (41) is symmetrically inserted inside the base (1), and the positioning rod (41) is fixedly connected to the base (1). A sliding sleeve (43) is symmetrically fixedly connected to the bottom surface of the movable plate (44), and the sliding sleeve (43) is slidably sleeved on the surface of the positioning rod (41).

5. The three-coordinate measuring fixture according to claim 4, characterized in that: The positioning rod (41) is respectively inserted into the surface of the rectangular plate (45) and the positioning seat (42); the rectangular plate (45) and the positioning rod (41) are slidably connected; and the positioning seat (42) and the positioning rod (41) are fixedly connected.

6. The three-coordinate measuring fixture according to claim 2, characterized in that: It also includes a limiting component (5) arranged between the base (1) and the hand wheel (47); The limiting assembly (5) comprises a ratchet (51) fixedly sleeved on the surface of the first screw (46) and a pin shaft (52) fixedly connected to the surface of the base (1); a ratchet (53) is rotatably sleeved on the surface of the pin shaft (52); and the ratchet (53) is mounted between the teeth of the ratchet (51).

7. The three-coordinate measuring fixture according to claim 6, characterized in that: A toggle rod (54) is fixedly connected to the surface of the ratchet pawl (53).

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