CN217585621U

CN217585621U - Thread detection device

Info

Publication number: CN217585621U
Application number: CN202221206026.8U
Authority: CN
Inventors: 赵鹏
Original assignee: Hangzhou Mizhiwei Automation Technology Co ltd
Current assignee: Hangzhou Mizhiwei Automation Technology Co ltd
Priority date: 2022-05-18
Filing date: 2022-05-18
Publication date: 2022-10-14
Anticipated expiration: 2032-05-18

Abstract

The utility model discloses a thread detection device, belonging to the thread detection field, comprising a frame, an actuator arranged on the frame, a motion mechanism connected with the output end of the actuator and a thread gauge arranged on the motion mechanism; the motion mechanism comprises a rotating shaft in a hollow structure and a sliding shaft coaxially arranged in the rotating shaft, the rotating shaft is coaxially and fixedly connected to the output end of the actuator, and the sliding shaft is in sliding connection with the rotating shaft along the axial direction of the sliding shaft; one end of the sliding shaft facing the actuator is connected with the rotating shaft through a spring, and the spring provides elastic force for preventing the sliding shaft from moving towards the actuator; the thread gauge is coaxially and fixedly connected to one end, away from the actuator, of the sliding shaft, and the measuring part of the thread gauge extends out of the rotating shaft. The utility model discloses during the use, have axial pressure's upper limit value between screw thread gauge and the work piece that awaits measuring, surpass this pressure upper limit value then both can't continue to close soon to protect the screw thread gauge effectively.

Description

Thread detection device

Technical Field

The utility model relates to a technical field is measured to the screw thread, in particular to screw thread detection device.

Background

In the field of machining, threaded connection is one of the important modes of fixed connection, and threaded connection usually needs to be checked for thread specifications before the product is manufactured and used so as to determine whether the manufacturing accuracy is up to standard and whether the threaded connection is usable.

The thread gauge is a detection tool for detecting whether threads are qualified or not, and comprises a thread plug gauge (used for detecting internal threads) and a thread ring gauge (used for detecting external threads). When the threaded workpiece with the threads is detected, the corresponding thread gauge is matched with the threads of the threaded workpiece, and when the threaded workpiece is used, whether the threaded workpiece is qualified or not is determined by judging whether the threaded workpiece can be screwed into the thread gauge or not.

In the conventional technology, the operation of detecting the threaded workpiece by using a thread gauge is usually completed manually, which not only results in high labor cost, but also is difficult to perform large-batch threaded workpiece detection operation, so that the thread detection efficiency is difficult to improve. In order to solve the problem, at present, machines such as a motor and the like are used for driving a thread gauge to rotate, so that only the thread of a workpiece to be detected is required to be aligned with the rotating thread gauge and screwed with the rotating thread gauge, whether the thread on the workpiece is qualified or not is judged by judging the condition that the thread gauge is screwed into the workpiece, and the thread on the workpiece is judged to be unqualified when the thread gauge cannot be screwed into the workpiece.

Under above-mentioned detection mode, the screw thread that unqualified work piece directly embodied on it can't twist with the thread gauge each other, consequently under external force operation, the screw thread that appears in the work piece very easily can with the circumstances that the thread gauge card is in the same place, then can lead to the impaired condition of thread gauge to appear when external force is great.

SUMMERY OF THE UTILITY MODEL

The problem that the impaired condition of thread gauge takes place appears easily in the screw thread testing process to prior art existence, the utility model aims to provide a screw thread detection device.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a thread detection device comprises a rack, an actuator arranged on the rack, a movement mechanism connected with the output end of the actuator and a thread gauge arranged on the movement mechanism;

the motion mechanism comprises a rotating shaft which is in a hollow structure and a sliding shaft which is coaxially arranged in the rotating shaft, the rotating shaft is coaxially and fixedly connected to the output end of the actuator, and the sliding shaft is in sliding connection with the rotating shaft along the axial direction of the sliding shaft; one end of the sliding shaft, facing the actuator, is connected with the rotating shaft through a spring, and the spring provides elastic force for preventing the sliding shaft from moving towards the actuator; the thread gauge is coaxially and fixedly connected to one end, away from the actuator, of the sliding shaft, and a measuring portion of the thread gauge extends out of the rotating shaft.

Preferably, a radial pin shaft perpendicular to the axis of the sliding shaft is fixedly mounted on the sliding shaft, and two guide grooves for allowing two ends of the radial pin shaft to slide are formed in the side wall of the rotating shaft in a central symmetry manner.

Preferably, first rolling bearings are mounted at two ends of the radial pin shaft to reduce friction.

Preferably, a stepped hole is formed in the inner wall of the rotating shaft, a linear bearing matched with the sliding shaft is installed in the stepped hole, and a first clamp spring used for limiting the linear bearing is further installed on the stepped hole.

Furthermore, the rotating shaft protection device further comprises a shell, wherein the shell is fixedly connected to the rack, and the shell is sleeved outside the rotating shaft to protect the rotating shaft.

Preferably, the both ends of shell are provided with the bearing step respectively, install in the bearing step with the second antifriction bearing of rotating shaft adaptation, still be provided with on the bearing step and be used for right second antifriction bearing carries out spacing second jump ring.

Furthermore, the device also comprises a connecting disc, the connecting disc is fixedly connected to an output shaft of the actuator, and one end part of the rotating shaft is fixedly connected with the connecting disc through a screw.

Preferably, the thread gauge includes a detection portion for detecting a thread and a connection rod connected to the detection portion.

Further, still include and change the piece, change the piece and be coaxial form ground fixed connection the slip axle deviates from the one end of executor, the connecting rod with change the piece and can dismantle the connection.

Preferably, an installation groove with a non-circular cross section is formed in the replacing part, and a torsion structure matched with the installation groove is arranged at the end part of the connecting rod; still be provided with the spring locating pin in changing the piece, be provided with correspondingly on the lateral wall of connecting rod with the positioning ring groove of spring locating pin looks adaptation.

Adopt above-mentioned technical scheme, the beneficial effects of the utility model reside in that: because motion for when appearing the bite between the screw thread of screw thread rule and the work piece that awaits measuring, the jamming effort can compress the spring on acting on all sliding shafts after, thereby makes sliding shaft and the screw thread rule of installing on it keep away from the work piece that awaits measuring, thereby makes on the jamming effort can't use the screw thread rule completely, and then protection screw thread rule.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the connection between the movement mechanism and the thread plug gauge of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

fig. 4 is a schematic structural view of the connection between the middle moving mechanism and the thread ring gauge of the present invention.

In the drawing, 1-a rack, 2-an actuator, 21-a connecting disc, 3-a thread gauge, 31-a detection part, 32-a connecting rod, 4-a rotating shaft, 5-a sliding shaft, 6-a radial pin shaft, 7-a guide groove, 8-a spring, 9-a first rolling bearing, 10-a linear bearing, 11-a first snap spring, 12-a shell, 13-a second rolling bearing, 14-a second snap spring, 15-a replacement part and 16-a spring positioning pin.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship of the structure of the present invention based on the drawings, and are only for the convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the technical scheme, the terms "first" and "second" are only used for referring to the same or similar structures or corresponding structures with similar functions, and are not used for ranking the importance of the structures, or comparing the sizes or other meanings.

In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meanings of the above terms in the present invention can be understood in relation to the present scheme in specific terms according to the general idea of the present invention.

Example one

A thread detection device comprises a frame 1, an actuator 2 arranged on the frame 1, a movement mechanism connected with the output end of the actuator 2 and a thread gauge 3 arranged on the movement mechanism, as shown in figure 1.

Wherein, the frame 1 is used for arranging the device on a bottom surface or a desktop for use, and plays a role of supporting other components. The actuator 2 is configured as a motor, and preferably as a geared motor, the actuator 2 being mounted vertically with its output shaft facing downwards.

As shown in fig. 2, the moving mechanism includes a rotating shaft 4 and a sliding shaft 5. Wherein, the rotating shaft 4 is hollow, the rotating shaft 4 is coaxially and fixedly connected with the output end of the actuator 2, for example, a connecting disc 21 is fixed on the output shaft of the actuator 2 by a key or welding way, and the upper end part of the rotating shaft 4 is fixedly connected with the connecting disc 21 by a screw; or in other embodiments, the upper end of the rotating shaft 4 is directly keyed onto the output of the actuator 2. The slide shaft 5 is coaxially arranged within the hollow structure of the rotary shaft 4, and in addition, the slide shaft 5 is slidably connected to the rotary shaft 4 in the axial direction thereof. In this embodiment, specifically, a shaft hole perpendicular to the axis of the sliding shaft 5 is formed in the sliding shaft 5, a radial pin shaft 6 is installed in the shaft hole, two ends of the radial pin shaft 6 protrude outside the sliding shaft 5, two guide grooves 7 are formed in the side wall of the rotating shaft 4 in a centrosymmetric manner, and two ends of the radial pin shaft 6 respectively extend into the two guide grooves 7, so that the sliding shaft 5 slides relative to the rotating shaft 4 along the axial direction thereof under the constraint action of the radial pin shaft 6 and the guide grooves 7.

The end (upper end) of the sliding shaft 5 facing the actuator 2 is connected to the rotating shaft 4 by a spring 8, and for example, the lower end of the spring 8 abuts against the upper end of the sliding shaft 5, and the upper end of the spring 8 abuts against a circlip provided on the upper portion of the inner wall of the rotating shaft 4. The spring 8 is configured as a helical compression spring, and the spring 8 provides an elastic force for preventing the slide shaft 5 from moving toward the actuator 2.

The thread gauge 3 includes an external thread gauge and an internal thread gauge, either of which is fixedly connected to an end (lower end) of the sliding shaft 5 away from the actuator 2 in a coaxial manner by welding or bonding, and the length dimension configuration of each part is suitable for extending a measuring part of the thread gauge 3 to the outside of the rotating shaft 4 so as to detect the thread on the workpiece to be detected.

The utility model discloses a theory of operation does: the actuator 2 is started, the output end of the actuator 2 drives the rotating shaft 4 to rotate, the sliding shaft 5 positioned in the rotating shaft 4 synchronously rotates under the restraint of the radial pin shaft 6 and the guide groove 7, when the thread of the workpiece to be tested is in screwing operation with the thread gauge 3, the thread can be smoothly screwed together if the thread specifications of the workpiece to be tested are matched, clamping stagnation can be generated if the thread specifications of the workpiece to be tested are not matched, the clamping stagnation acting force is transmitted to the sliding shaft 5 through the thread gauge 3, the sliding shaft 5 overcomes the elastic force of the spring 8 and slides towards one side of the actuator 2, namely, the sliding shaft 5 drives the thread gauge 3 to be tested to be far away from the workpiece to be tested below, so that the clamping stagnation acting force cannot be increased without an upper limit, the upper limit of the clamping stagnation acting force is limited through the preset elastic force of the spring 8, and the threads on the thread gauge 3 and the workpiece to be tested are effectively protected.

Example two

In this embodiment, the first rolling bearings 9 are mounted at both ends of the radial pin 6, and the diameter of the first rolling bearings 9 is adapted to the width of the guide groove 7, so that when the sliding shaft 5 moves axially, sliding is replaced by rolling, and friction between the sliding shaft 5 and the rotating shaft 4 is reduced.

EXAMPLE III

In this embodiment, a stepped hole is formed in the inner wall where the rotating shaft 4 is disposed, the stepped hole is disposed below the guide groove 7, a linear bearing 10 adapted to the sliding shaft 5 is installed in the stepped hole, and a first snap spring 11 for axially limiting the linear bearing 10 is also installed in the stepped hole.

With this arrangement, on the one hand, the linear bearing 10 keeps the axis of the slide shaft 5 stable, thereby preventing the swing during the rotation, and the linear bearing 10 can also reduce the friction force against the slide shaft 5.

Example four

In this embodiment, a housing 12 is fitted around the outer side of the rotating shaft 4, and the housing 12 is fixedly connected to the frame 1 by means of screws or threads, so that the rotating shaft 4 is protected by the housing 12.

In another preferred embodiment, the housing 12 is arranged coaxially with the rotating shaft 4, and two ends of the housing 12 are respectively provided with a bearing step, a second rolling bearing 13 adapted to the rotating shaft 4 is installed in the bearing step, and a second snap spring 14 for limiting the second rolling bearing 13 is also arranged on an inner wall of the bearing step. With this arrangement, on the one hand, the second rolling bearing 13 keeps the axis of the rotating shaft 4 stable, and prevents the rocking during the rotation, and in addition, the second rolling bearing 13 can also reduce the friction force against the rotating shaft 4. Further, by providing the housing 12, the weight of the motion mechanism is borne by the housing 12, and the load on the actuator 2 is reduced.

EXAMPLE five

In the present embodiment, the arrangement screw gauge 3 includes a detection portion 31 for detecting a screw, and a connection rod 32 connected to the detection portion 31. As shown in fig. 2-3, the screw plug gauge for detecting the internal threaded hole generally has a detecting portion 31 and a connecting rod 32, and the details of this embodiment are not repeated; however, as for the thread ring gauge for detecting the external thread, it usually has only the detecting portion 31, and therefore in this embodiment, the connecting rod 32 is also attached to the detecting portion 31 thereof by welding, so that the two thread gauges have similar structures, and it is understood that the thread gauges 3 for detecting different types and sizes have the same connecting rod 32, except that the detecting portion 31 is different, as shown in fig. 4.

A replacement part 15, for example, a pin connection or a key connection, is also coaxially and fixedly connected to one end (lower end) of the slide shaft 5 facing away from the actuator 2. The lower end of the replacing part 15 is provided with a hole structure for the connecting rod 32 to penetrate into and realize fixation, the cross section of the hole bottom of the hole structure is provided with a non-circular mounting groove, and the free end part of the corresponding connecting rod 32 is provided with a torsion structure matched with the mounting groove, such as a half moon shape or a square shape. In addition, the inner wall of the hole-shaped structure is also provided with a spring positioning pin 16 arranged along the radial direction of the hole-shaped structure, and correspondingly, the side wall of the connecting rod 32 is correspondingly provided with a positioning ring groove matched with the spring positioning pin 16.

So set up for screw thread rule 3 when needs are changed, only need overcome spring locating pin 16's elasticity at external force and make it retract to change in 15 after, can take out screw thread rule 3's connecting rod 32, change new screw thread rule 3 after, its connecting rod 32 stretches into in changing the poroid structure of 15, carry out axial positioning to it by spring locating pin 16, realize the transmission of torsional moment by mounting groove and torsion structure, thereby realize normal use.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. A thread detection device characterized in that: the thread gauge comprises a rack, an actuator arranged on the rack, a movement mechanism connected with the output end of the actuator and a thread gauge arranged on the movement mechanism;

2. The thread sensing device of claim 1, wherein: the sliding shaft is fixedly provided with a radial pin shaft perpendicular to the axis of the sliding shaft, and the side wall of the rotating shaft is centrally and symmetrically provided with two guide grooves for the two ends of the radial pin shaft to slide respectively.

3. The thread sensing device of claim 2, wherein: first rolling bearings are mounted at two ends of the radial pin shaft to reduce friction.

4. The thread sensing device of claim 1, wherein: the inner wall of the rotating shaft is provided with a step hole, a linear bearing matched with the sliding shaft is installed in the step hole, and a first clamp spring used for limiting the linear bearing is further installed on the step hole.

5. The thread sensing device of claim 1, wherein: still include the shell, shell fixed connection is in the frame, just the shell cover is established the outside of rotation axis is in order to protect the rotation axis.

6. The thread sensing device of claim 5, wherein: the two ends of the shell are respectively provided with a bearing step, a second rolling bearing matched with the rotating shaft is installed in the bearing steps, and a second clamping spring used for limiting the second rolling bearing is further arranged on the bearing steps.

7. The thread sensing device of claim 1, wherein: the rotary actuator further comprises a connecting disc, the connecting disc is fixedly connected to an output shaft of the actuator, and one end of the rotary shaft is fixedly connected with the connecting disc through a screw.

8. The thread sensing device of claim 1, wherein: the thread gauge comprises a detection part for detecting the thread and a connecting rod connected with the detection part.

9. The thread sensing device of claim 8, wherein: still including changing the piece, change the piece and be coaxial form ground fixed connection the sliding shaft deviates from the one end of executor, the connecting rod with change the piece and can dismantle the connection.

10. The thread sensing device of claim 9, wherein: an installation groove with a non-circular cross section is formed in the replacing part, and a torsion structure matched with the installation groove is arranged at the end part of the connecting rod; still be provided with the spring locating pin in changing the piece, be provided with correspondingly on the lateral wall of connecting rod with the positioning ring groove of spring locating pin looks adaptation.