Single-point measuring device

Abstract

The utility model provides a single-point measuring device, which comprises a shell, a lever mechanism, a contraction and expansion mechanism, a magnetic core and a coil mechanism, and is characterized in that the lever mechanism, the contraction and expansion mechanism, the magnetic core and the coil mechanism are all arranged in the shell; the lever mechanism comprises a first end and a second end, the first end is arranged in the shell, the second end extends out of the shell, the first end is connected with the magnetic core, and the second end is used for being connected with the measuring head; one end of the coil mechanism is provided with a channel for movement of the magnetic core, and the other end is connected with a cable; the retracting and stretching mechanism is connected with the lever mechanism and can push the lever mechanism to swing in the direction perpendicular to the axis of the lever mechanism so as to drive the magnetic core to move in the coil mechanism in the direction perpendicular to the axis of the lever mechanism. Compared with the prior art, the single-point measuring device has the advantages that the possibility of failure caused by the fact that cutting fluid enters the stretching and retracting mechanism is avoided, the reliability of the single-point measuring device is effectively improved, and the whole single-point measuring device is smaller in occupied space and more compact in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of measurement sensors, and particularly relates to a single-point measurement device. Background Art

[0002] The single-point measurement device is an important part in the field of active measurement, and is often used for the end face positioning and the measurement of the outer diameter and inner hole during the grinding process of shaft parts. At present, the expansion and contraction mechanism in the single-point measurement device is usually arranged outside the housing of the single-point measurement device. Since there is a large amount of cutting fluid during the operation of the machine tool, when the expansion and contraction mechanism is placed outside the housing, the cutting fluid is very likely to enter the expansion and contraction mechanism, resulting in the failure of the expansion and contraction mechanism and greatly reducing the reliability of the single-point measurement device.

[0003] Therefore, how to overcome the above technical defects is an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a single-point measurement device, which can avoid the possibility of failure caused by the cutting fluid entering the expansion and contraction mechanism, thereby effectively improving the reliability of the single-point measurement device.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A single-point measurement device includes a housing, a lever mechanism, an expansion and contraction mechanism, a magnetic core and a coil mechanism. The lever mechanism, the expansion and contraction mechanism, the magnetic core and the coil mechanism are all arranged inside the housing;

[0007] The lever mechanism includes a first end and a second end. The first end is arranged inside the housing, the second end extends outside the housing, the first end is connected to the magnetic core, and the second end is used for connecting to a measuring head;

[0008] One end of the coil mechanism is provided with a channel for the movement of the magnetic core, and the other end is connected to a cable;

[0009] The expansion and contraction mechanism is connected to the lever mechanism, and the expansion and contraction mechanism can push the lever mechanism to swing in a direction perpendicular to the axis of the lever mechanism, so as to drive the magnetic core to move in the coil mechanism in a direction perpendicular to the axis of the lever mechanism.

[0010] Optionally, the lever mechanism includes a lever body and a fulcrum part, and the fulcrum part is arranged at a position of the lever body close to the second end;

[0011] The lever body is a bar-shaped structure, the fulcrum portion is a block-shaped structure, both ends of the fulcrum portion extend in a direction perpendicular to the axis of the lever body, and the lever body and the fulcrum portion are integrally formed.

[0012] Optionally, a fixing bracket is further included, which is detachably arranged in the shell and connected to the fulcrum.

[0013] Optionally, an elastic support mechanism is further included, which includes at least a leaf spring and a first pressure block, one end of the leaf spring is arranged between the first pressure block and the fulcrum portion, and the first pressure block presses the leaf spring onto the lever mechanism.

[0014] Optionally, the elastic support mechanism further includes a second pressing block, the other end of the leaf spring is arranged between the fixed bracket and the second pressing block, the fixed bracket is provided with a pressing groove, and the second pressing block presses the leaf spring into the pressing groove.

[0015] Optionally, the leaf spring is a rectangular flat plate structure.

[0016] Optionally, a compression spring is further provided between the lever mechanism and the housing.

[0017] Optionally, the retracting and expanding mechanism includes a cylinder and a cylinder piston, the cylinder piston is arranged in the cylinder, and the cylinder piston is connected to the lever mechanism.

[0018] Optionally, the shell includes a bottom shell and a cover plate, and the cover plate is detachably arranged on the bottom shell.

[0019] Optionally, the coil mechanism includes a coil seat, a coil magnetic sleeve, and a coil frame. The coil seat is arranged in the shell, the coil frame is arranged on the coil seat, the coil magnetic sleeve is arranged on the coil frame, and the coil frame is provided with the channel.

[0020] It can be seen from the above technical solution that when using a single-point measuring device, the measuring head detects the dimensional change of the workpiece to be measured and transmits the signal to the retracting and stretching mechanism. The retracting and stretching mechanism will push and pull the lever mechanism as the size of the workpiece to be measured changes, causing the lever mechanism to swing in a direction perpendicular to the axis of the lever mechanism. At this time, the magnetic core moves in the coil mechanism as the lever mechanism swings, and the coil mechanism transmits the signal to the cable, which outputs the signal.

[0021] Compared with the prior art, the expansion and contraction mechanism disclosed in the embodiment of the present utility model is arranged inside the housing. Due to the blocking effect of the housing, cutting fluid is not easily introduced into the expansion and contraction mechanism during the operation of the machine tool, avoiding the possibility of malfunctions caused by the entry of cutting fluid into the expansion and contraction mechanism, effectively improving the reliability of the single-point measurement device, and moreover, the space occupied by the entire single-point measurement device is smaller and the structure is more compact. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only the embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0023] Figure 1 It is a schematic structural diagram of the single-point measurement device provided by the embodiment of the present utility model.

[0024] Explanation of the Reference Numerals in the Drawings:

[0025] 100, housing; 200, lever mechanism; 201, lever body; 202, fulcrum part; 300, expansion and contraction mechanism; 301, cylinder; 302, piston; 400, magnetic core; 500, coil mechanism; 501, coil seat; 502, coil skeleton; 503, coil magnetic sleeve; 600, fixed bracket; 700, elastic support mechanism; 701, leaf spring; 702, first pressing block; 70, second pressing block; 800 - cable fixing seat. Detailed Embodiments

[0026] In view of this, the core of the present utility model is to provide a single-point measurement device that can avoid the possibility of malfunctions caused by the entry of cutting fluid into the expansion and contraction mechanism, thereby effectively improving the reliability of the single-point measurement device.

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] Please refer to Figure 1, the single-point measuring device disclosed in the embodiments of the present utility model includes a housing 100, a lever mechanism 200, a contraction and expansion mechanism 300, a magnetic core 400, and a coil mechanism 500. Among them, the lever mechanism 200, the contraction and expansion mechanism 300, the magnetic core 400, and the coil mechanism 500 are all arranged inside the housing 100.

[0029] Specifically, the lever mechanism 200 includes a first end and a second end. The first end is arranged inside the housing 100, the second end extends outside the housing 100, the first end is connected to the magnetic core 400, and the second end is used to connect to the measuring head.

[0030] One end of the coil mechanism 500 is provided with a channel for the movement of the magnetic core 400, and the other end is connected to a cable.

[0031] The contraction and expansion mechanism 300 is connected to the lever mechanism 200. The contraction and expansion mechanism 300 can push the lever mechanism to swing in a direction perpendicular to the axis of the lever mechanism, so as to drive the magnetic core 400 to move in the coil mechanism 500 in a direction perpendicular to the axis of the lever mechanism 200.

[0032] When using the single-point measuring device, the measuring head detects the dimensional change of the workpiece to be measured and transmits the signal to the contraction and expansion mechanism 300. The contraction and expansion mechanism 300 will push and pull the lever mechanism 200 as the dimensional change of the workpiece to be measured, so that the lever mechanism 200 swings in a direction perpendicular to the axis of the lever mechanism 200. At this time, the magnetic core 400 moves in the coil mechanism 500 as the lever mechanism 200 swings, and the coil mechanism 500 transmits the signal to the cable, and the cable outputs the signal.

[0033] Compared with the prior art, the contraction and expansion mechanism 300 disclosed in the embodiments of the present utility model is arranged inside the housing 100. Due to the blocking effect of the housing 100, the cutting fluid is not easily introduced into the contraction and expansion mechanism 300 during the operation of the machine tool, avoiding the possibility of failure caused by the cutting fluid entering the contraction and expansion mechanism 300, effectively improving the reliability of the single-point measuring device, and the entire single-point measuring device occupies less space and has a more compact structure.

[0034] The embodiments of the present utility model do not limit the specific structure of the lever mechanism 200, and any structure that meets the usage requirements of the present utility model is within the protection scope of the present utility model.

[0035] As one of the embodiments, the lever mechanism 200 disclosed in the embodiments of the present utility model includes a lever body 201 and a fulcrum portion 202. The fulcrum portion 202 is arranged at a position of the lever body 201 close to the second end.

[0036] The lever body 201 is a bar-shaped structure, the fulcrum portion 202 is a block-shaped structure, both ends of the fulcrum portion 202 extend in a direction perpendicular to the axis of the lever body 201 , and the lever body 201 and the fulcrum portion 202 are integrally formed.

[0037] When the single-point measuring device is in operation, the lever body 201 swings with the fulcrum portion 202 as a fulcrum in a direction perpendicular to the axis direction of the lever body 201 .

[0038] In order to effectively fix the fulcrum portion 202 , the single-point measurement device disclosed in the embodiment of the present invention further includes a fixing bracket 600 . The fixing bracket 600 is detachably disposed in the housing 100 and is connected to the fulcrum portion 202 .

[0039] As a further embodiment, the single-point measurement device disclosed in the embodiment of the present utility model further includes an elastic support mechanism 700, wherein the elastic support mechanism 700 includes at least a leaf spring 701 and a first pressure block 702. One end of the leaf spring 701 is disposed between the first pressure block 702 and the fulcrum portion 202, and the first pressure block 702 presses the leaf spring 701 against the lever mechanism 200. This arrangement can achieve elastic support for the lever mechanism 200, thereby enabling accurate measurement of the workpiece to be measured.

[0040] It should be noted that the single-point measurement device disclosed in the embodiment of the present invention further includes a first pressing member, wherein the first pressing block 702 presses the leaf spring 701 onto the lever mechanism 200 through the first pressing member.

[0041] In order to further improve the connection strength of the leaf spring 701, the elastic support mechanism 700 disclosed in the embodiment of the present invention also includes a second pressure block 703, wherein the other end of the leaf spring 701 is arranged between the fixed bracket 600 and the second pressure block 703, and a pressure groove is provided on the fixed bracket 600, and the second pressure block 703 presses the leaf spring 701 tightly in the pressure groove.

[0042] It should be noted that the single-point measurement device disclosed in the embodiment of the present invention further includes a second pressing member, wherein the first pressing block 702 presses the leaf spring 701 onto the fixing bracket 600 through the first pressing member.

[0043] In this configuration, the first pressing block 702 and the second pressing block 703 are respectively disposed at both ends of the leaf spring 701 , fixing the leaf spring 701 to the fixing bracket 600 and the lever mechanism 200 , thereby further improving the connection strength of the leaf spring 701 in the single-point measurement device.

[0044] In order to further improve the overall rigidity of the elastic support mechanism 700 , the leaf spring 701 disclosed in the embodiment of the present invention is preferably a rectangular flat plate structure.

[0045] As a further embodiment, a compression spring is further disposed between the lever mechanism 200 and the housing 100 disclosed in the embodiments of the present utility model. With such a setting, it is convenient to realize the swing of the lever mechanism 200.

[0046] The embodiments of the present utility model do not limit the specific structure of the expansion and contraction mechanism 300, and any structure that meets the use requirements of the present utility model is within the protection scope of the present utility model.

[0047] As one of the embodiments, the expansion and contraction mechanism 300 disclosed in the embodiments of the present utility model includes a cylinder 301 and a piston 302 of the cylinder 301. The piston 302 of the cylinder 301 is disposed in the cylinder 301, and the piston 302 of the cylinder 301 is connected to the lever mechanism 200.

[0048] The embodiments of the present utility model do not limit the specific structure of the housing 100, and any structure that meets the use requirements of the present utility model is within the protection scope of the present utility model.

[0049] As one of the embodiments, the housing 100 disclosed in the embodiments of the present utility model includes a bottom case and a cover plate. The cover plate is detachably disposed on the bottom case. After the cover plate is connected to the bottom case, the housing 100 has a closed cavity capable of installing the lever mechanism 200, the expansion and contraction mechanism 300, the magnetic core 400, and the coil mechanism 500.

[0050] The embodiments of the present utility model do not limit the specific structure of the coil mechanism 500, and any structure that meets the use requirements of the present utility model is within the protection scope of the present utility model.

[0051] As one of the embodiments, the coil mechanism 500 disclosed in the embodiments of the present invention includes a coil seat 501, a coil magnetic sleeve 503, and a coil bobbin 502. The coil seat 501 is disposed in the housing 100, the coil bobbin 502 is disposed on the coil seat 501, the coil magnetic sleeve 503 is sleeved on the coil bobbin 502, and a channel is provided in the coil bobbin 502.

[0052] It should be noted that the single-point measuring device further includes a cable fixing seat 800 for installing cables.

[0053] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or device.

[0054] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0055] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A single-point measurement device, characterized in that: It includes a housing, a lever mechanism, a contracting and expanding mechanism, a magnetic core, and a coil mechanism. The lever mechanism, the contracting and expanding mechanism, the magnetic core, and the coil mechanism are all arranged inside the housing; The lever mechanism includes a first end and a second end. The first end is arranged inside the housing, and the second end extends out of the housing. The first end is connected to the magnetic core, and the second end is used to connect to a measuring head; One end of the coil mechanism is provided with a channel for the movement of the magnetic core, and the other end is connected to a cable; The contracting and expanding mechanism is connected to the lever mechanism. The contracting and expanding mechanism can push the lever mechanism to swing in a direction perpendicular to the axis of the lever mechanism, so as to drive the magnetic core to move in a direction perpendicular to the axis of the lever mechanism in the coil mechanism.

2. The single-point measurement device according to claim 1, characterized in that The lever mechanism includes a lever body and a fulcrum part. The fulcrum part is arranged at a position of the lever body close to the second end; The lever body is a strip-shaped structure, and the fulcrum part is a block-shaped structure. Both ends of the fulcrum part extend in a direction perpendicular to the axis of the lever body, and the lever body and the fulcrum part are integrally formed.

3. The single-point measuring device according to claim 2, wherein It further includes a fixing bracket. The fixing bracket is detachably arranged inside the housing, and the fixing bracket is connected to the fulcrum part.

4. The single-point measurement device according to claim 3, characterized in that It further includes an elastic support mechanism. The elastic support mechanism at least includes a leaf spring and a first pressing block. One end of the leaf spring is arranged between the first pressing block and the fulcrum part, and the first pressing block presses the leaf spring against the lever mechanism.

5. The single-point measurement device according to claim 4, characterized in that: The elastic support mechanism further includes a second pressing block. The other end of the leaf spring is arranged between the fixing bracket and the second pressing block. A pressing groove is arranged on the fixing bracket, and the second pressing block presses the leaf spring in the pressing groove.

6. The single-point measurement device according to claim 4, characterized in that, The leaf spring is a rectangular flat plate structure.

7. The single-point measurement device according to claim 1, wherein A compression spring is further arranged between the lever mechanism and the housing.

8. The single-point measuring device according to claim 1, characterized in that, The contracting and expanding mechanism includes a cylinder and a cylinder piston. The cylinder piston is arranged inside the cylinder, and the cylinder piston is connected to the lever mechanism.

9. The single-point measurement device according to claim 1, characterized in that: The housing includes a bottom shell and a cover plate. The cover plate is detachably arranged on the bottom shell.

10. The single-point measuring device according to claim 1, wherein The coil mechanism includes a coil seat, a coil magnetic sleeve, and a coil skeleton. The coil seat is arranged inside the housing, the coil skeleton is arranged on the coil seat, the coil magnetic sleeve is sleeved on the coil skeleton, and the channel is formed on the coil skeleton.

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