CN113048856A - Part channel bottom diameter gauge - Google Patents

Abstract

The invention relates to the technical field of part size detection, in particular to a part channel bottom diameter detection tool. The part channel bottom diameter gauge comprises a frame body, a dial indicator with a zero adjustment function, a detection part, a positioning part and a calibration gauge; the detection part and the positioning part are connected to the frame body in a facing manner, the detection part can move relative to the frame body to be close to or far away from the positioning part, the positioning part can form a plurality of first contact points with any channel of a channel to be detected or a calibration channel, the detection part can form a single second contact point with the channel, and the circle center of the channel is surrounded by the connecting line of the plurality of first contact points and the single second contact point; the amesdial includes the table body and contact, and the table body is connected with the support body, and the contact deviates from in the lateral part butt of location portion with the detection portion. The part channel bottom diameter gauge can realize online detection of a part channel, and can effectively control the measurement precision in the horizontal direction and the vertical direction, so that the measurement precision is up to +/-0.003 mm.

Description

Part channel bottom diameter gauge

Technical Field

The invention relates to the technical field of part size detection, in particular to a part channel bottom diameter detection tool.

Background

In the related art, a part similar to a planet carrier comprises a part with an outer channel, the part channel mostly exists in a curved surface special shape, and a traditional micrometer cannot accurately measure the bottom diameter of the part channel. Usually, a three-coordinate measuring instrument is needed for measurement, but the three-coordinate measuring instrument has high cost and harsh use conditions, so that the online measurement of the bottom diameter of the part channel cannot be realized.

Disclosure of Invention

The invention aims to provide a part channel bottom diameter gauge, which solves the technical problem that the part channel bottom diameter detection in the prior art depends on a three-coordinate measuring instrument and cannot realize online detection to a certain extent.

In order to achieve the above object, the present invention provides the following technical solutions;

based on the aim, the part channel bottom diameter gauge provided by the invention comprises a frame body, a dial indicator with a zero adjustment function, a detection part, a positioning part and a calibration gauge;

the size of a channel to be measured of the part to be measured takes the size of a calibration channel of the calibration gauge as a standard;

the detection part and the positioning part are connected to the frame body in a facing manner, the detection part can move relative to the frame body to be close to or far away from the positioning part, the positioning part can form a plurality of first contact points with any one of the channel to be detected or the calibration channel, the detection part can form a single second contact point with the channel, and a connecting line of the plurality of first contact points and the single second contact point surrounds the center of the channel;

the dial indicator comprises an indicator body and a contact, the indicator body is connected with the frame body, the reading of the indicator body is related to the touched amplitude of the contact, and the contact is abutted against the side part of the detection part, which is deviated from the positioning part, so that the contact can be touched by the detection part.

In any one of the above technical solutions, optionally, the positioning portion includes two positioning bulbs connected to the frame body at a predetermined span, the detection portion includes one detection bulb, and the size and the shape of the detection bulb are completely the same as those of the positioning bulbs.

In any of the above technical solutions, optionally, a perpendicular bisector of a connection line between the centers of sphere of the two positioning ball heads passes through the center of sphere of the detection ball head.

In any one of the above technical solutions, optionally, the positioning portion further includes a first mounting seat and a connecting seat, the positioning ball is detachably connected to one end of the connecting seat, and the other end of the connecting seat is detachably connected to the first mounting seat.

In any one of the above technical solutions, optionally, the specification of the positioning ball head is multiple, the connecting seat is a universal connecting seat, and the positioning ball head of multiple specifications can be detachably connected with the universal connecting seat.

In any one of the above technical solutions, optionally, the specification of the first mounting seat is multiple, each specification of the first mounting seat may be detachably connected to the frame body, and each specification of the first mounting seat may be provided with a universal mounting portion detachably adapted to the universal connecting seat.

In any of the above technical solutions, optionally, the elastic reset device further includes a guide portion, where the guide portion includes a guide rod, a second mounting seat, and an elastic reset piece;

the frame body is provided with a first guide through hole, the second mounting seat is connected with the frame body, and the second mounting seat is provided with a second guide through hole which is consistent with the guide direction of the first guide through hole;

the first end of the guide rod is detachably connected with the detection ball head, and the second end of the guide rod sequentially and radially extends into the first guide through hole and the second guide through hole in a matched manner;

the meter body is connected with the second mounting seat, and the contact extends into the second guide through hole and is abutted against the second end of the guide rod.

In any of the above technical solutions, optionally, the part channel bottom diameter gauge further includes a toggle assembly;

the poking assembly comprises a poking rod and a poking handle which are connected, one end of the poking rod, which is connected with the poking handle, is movably connected with the frame body, and an avoiding groove is formed in the side part, facing the connecting position of the poking handle and the frame body, of the second mounting seat, and penetrates through the first guide through hole and the second guide through hole simultaneously, so that part of the guide rod is exposed through the avoiding groove;

the other end of the poke rod extends into the avoiding groove and is connected with the guide rod, and the poke handle can enable the guide rod to move along with the poke rod.

In any of the above technical solutions, optionally, the guide portion further includes a limiting protrusion, and the limiting protrusion is connected to the guide rod and protrudes outward along a radial direction of the guide rod relative to a portion of the guide rod adapted to the second guide through hole, so as to stop a portion between the first end of the guide rod and the limiting protrusion from entering the second guide through hole.

In any of the above technical solutions, optionally, the elastic resetting member includes a movable cylinder and an elastic member;

the movable cylinder body is slidably arranged in the second guide through hole in a penetrating mode, one end of the movable cylinder body is open, the other end of the movable cylinder body is provided with a cylinder bottom, and the cylinder bottom of the movable cylinder body is fixedly connected with the contact so that the movable cylinder body and the contact can move synchronously;

the opening of the movable cylinder body deviates from the first guide through hole, and the elastic part is supported between the cylinder bottom of the movable cylinder body and the end part of the second guide through hole, which deviates from the first guide through hole.

By adopting the technical scheme, the invention has the beneficial effects that:

the invention provides a part channel bottom diameter gauge which comprises a frame body, a dial indicator with a zero adjustment function, a detection part, a positioning part and a calibration gauge. The dimension of the channel to be measured of the part to be measured takes the dimension of the calibration channel of the calibration gauge as a standard, so that the calibration channel of the calibration gauge can be used for zeroing the dial indicator. The part channel bottom diameter gauge comprises: the detection part and the positioning part are connected to the frame body in a facing mode, the detection part can move relative to the frame body to be close to or far away from the positioning part, the channel to be detected is clamped through the detection part and the positioning part, reading can be conducted through a dial indicator, compared with a three-coordinate measuring instrument, the operation is easy, and the prior detection of the channel to be detected of the part to be detected can be achieved; secondly, the positioning part can form a plurality of first contact points with any channel in the channel to be measured or the calibration channel, the detection part can form a single second contact point with the channel, the connecting line of the plurality of first contact points and the single second contact point surrounds the center of the channel, and multi-point positioning clamping measurement is carried out on the channel to be measured through the plurality of first contact points and the single second contact point, compared with a traditional outside micrometer, the control precision in the vertical direction and the horizontal direction can be controlled simultaneously, so that the measurement precision of the channel to be measured can reach +/-0.003 mm; thirdly, the method is particularly suitable for online detection of the combined planet carrier; fourth, the amesdial includes the table body and contact, the table body is connected with the support body, the reading of the table body is relevant with the range that the contact was touched, the contact is with the lateral part butt that deviates from in location portion of measuring section, so that the contact can be touched by the detection portion, zero set the amesdial when using the calibration channel, the rethread this part channel carries out the comparison measurement to the channel that awaits measuring, can be through the direct end footpath error of the channel that awaits measuring of department of amesdial alone, the reading is directly perceived convenient, improve the on-line measuring efficiency of parts machining scene by a wide margin, and reduced the detection cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic view of a first structure of a to-be-measured part of a part channel bottom diameter gauge provided in an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of a to-be-measured part of the part channel bottom diameter gauge provided in the first embodiment of the present invention;

fig. 3 is a schematic diagram of a third structure of a to-be-measured part of the part channel bottom diameter gauge in the first embodiment of the present invention;

fig. 4 is a schematic structural diagram of a to-be-measured part of the part channel bottom diameter gauge provided in the first embodiment of the present invention;

fig. 5 is a partial enlarged view of fig. 4 at a.

Icon: 1-a part to be tested; 10-a channel to be tested; 2-a part channel bottom diameter gauge; 20-frame body; 21-dial indicator; 210-a watch body; 211-a contact; 220-detecting a ball head; 23-a positioning section; 230-a positioning ball head; 231-a first mount; 232-connecting seat; 24-a guide; 240-guide bar; 241-a second mount; 242-a resilient return member; 2420-fixing the cylinder; 2421-a movable cylinder; 2422-an elastic member; 243-limit projection; 25-a calibration gauge; 26-a toggle assembly; 260-hinged seat; 261-a poker bar; 262-toggle handle.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

The bottom diameter of the part channel provided by the embodiment is used for measuring the bottom diameter of the part channel, and is particularly suitable for online measurement.

Referring to fig. 1 to 5, the part channel bottom diameter gauge 2 provided in this embodiment includes a frame body 20, a dial indicator 21 having a zero setting function, a detection portion, a positioning portion 23, and a calibration gauge 25.

Hereinafter, the above-described components of the component channel bottom diameter gauge 2 will be described in detail.

In this embodiment, the frame body 20 needs to be supported by a material with extremely high rigidity to prevent the measurement deformation. Optionally, the shelf 20 is a U-shaped shelf.

In an alternative of this embodiment, the dimension of the channel 10 to be measured of the part 1 to be measured uses the dimension of the calibration channel of the calibration gauge 25 as a standard, so that in the process of detecting the calibration gauge 25 by using the part channel bottom diameter detector 2, the dimension reading measured by the dial indicator 21 is the standard dimension of the calibration channel of the calibration gauge 25, in this state, the dial indicator is zeroed, then the part channel bottom diameter detector 2 is used to measure the channel 10 to be measured of the part 1 to be measured, the dimension reading measured by the dial indicator 21 is the dimension difference between the channel 10 to be measured and the standard channel, that is, the bottom diameter dimension deviation of the channel 10 to be measured, so that a worker can directly measure the bottom diameter dimension deviation of the channel 10 to be measured on line, so as to determine whether the bottom diameter dimension deviation of the channel 10 to be measured is within an allowable range.

Specifically, the dial indicator 21 includes a gauge body 210 and a contact 211, the gauge body 210 is connected with the frame body 20, and the reading of the gauge body 210 is related to the magnitude of the contact 211 being touched. After the zero setting, the standard gauge needs to be measured for multiple times to verify the detection precision of the part channel bottom diameter detection tool 2.

In an alternative of this embodiment, the detecting portion and the positioning portion 23 are connected to the frame body 20 in a facing manner, and a part clamping space to be measured is defined between the detecting portion and the positioning portion 23. The detection part can move relative to the frame body 20 to be close to or far away from the positioning part 23, so as to adjust the clamping space of the part to be detected according to the size of the part to be detected 1.

The positioning portion 23 can form a plurality of first contact points with any one of the channel 10 to be measured or the calibration channel, and the detection portion can form a single second contact point with the channel, so that the center of the channel is surrounded by connecting lines of the plurality of first contact points and the single second contact point by carrying out multi-point supporting and positioning on the channel 10 to be measured through the plurality of first contact points of the positioning portion 23, and the risk of slipping of the part 1 to be measured from the clamping space of the part to be measured is effectively reduced.

It should be noted that the "contact point" is not limited to an absolute point, but refers to a contact position that is approximately "point contact" in the mechanical field, and compared with a "surface contact" structure in which the positioning portion 23 is set as an arc surface, the "point contact" structure can reduce the joint action of the machining error of the arc surface of the positioning portion 23 and the roundness error of the channel 10 to be measured, and convert the machining error into a bottom diameter error measurement value of the channel 10 to be measured, and further perform a plurality of first contact points on the calibration channel through the positioning portion 23, which is beneficial to improving the bottom diameter detection accuracy of the channel.

The contact 211 abuts against the side of the detection part departing from the positioning part 23, so that the contact 211 can be touched by the detection part, that is, the position of the detection part moves along with the change of the bottom diameter size of the channel 10 to be measured of different parts 1 to be measured, so that the contact 211 can be touched by different amplitudes, and the size deviation of the bottom diameter of the channel 10 to be measured can be obtained through the size reading of the meter body 210.

In this embodiment, location portion 23 includes two location bulbs 230 that connect in support body 20 with predetermined span, the detection portion includes a detection bulb 220, through two location bulbs 230 and a detection bulb 220, thereby can form three point location support to the channel 10 that awaits measuring, thereby can all realize closely laminating in two first contact points and a second contact point department, carry out accurate location and firm when holding in addition to the channel 10 that awaits measuring, make the quantity minimizing of location bulb 230, be favorable to further reducing the influence of the relative position error between a plurality of location bulbs 230 to the measurement accuracy of channel 10 that awaits measuring.

The size and the shape of the detection ball head 220 and the positioning ball head 230 are completely the same, wherein the size mainly refers to the ball diameter, so that the detection ball head 220 and the positioning ball head 230 can be ensured to be in contact with the channel 10 to be tested in the same posture in the horizontal direction and the vertical direction, and particularly, the situation that the clamping position of the channel 10 to be tested has a vertical deviation due to the size difference between the detection ball head 220 and the positioning ball head 230 is avoided, so that the detection ball head 220 and the positioning ball head 230 can clamp the part 1 to be tested in the horizontal direction.

In the alternative of this embodiment, two positioning clamping forces are applied to the channel 10 to be detected at two first contact points, one detection clamping force is applied to the channel 10 to be detected at one second contact point, and the perpendicular bisector of the connecting line of the centers of sphere of the two positioning bulbs 230 passes through the center of sphere of the detection bulb 220, so that the component forces of the two positioning clamping forces along the connecting line of the centers of sphere can be mutually offset, and the component forces of the two positioning clamping forces along the perpendicular bisector and the detection clamping force can be mutually offset, so that the part 1 to be detected is in a state of stress balance, and the part 1 to be detected can perform bottom diameter detection in a stable state, thereby avoiding slippage of the part 1 to be detected in the process of being clamped and detected.

In the alternative of this embodiment, location portion 23 still includes first mount pad 231 and connecting seat 232, and the location bulb 230 can be dismantled with the one end of connecting seat 232 and be connected to after the location bulb 230 takes place excessive wearing and tearing, can in time replace location bulb 230, realize that this part channel end footpath examines the part of utensil 2 and overhauls the replacement, examine the life of utensil 2 at the bottom of with extension part channel. The other end of the connection seat 232 is detachably connected to the first mounting seat 231, so as to provide a structural foundation for the diversity of the partial replacement manner of the positioning portion 23.

In the alternative of this embodiment, the specification of the channel 10 to be measured may be multiple, the specification of the positioning ball 230 needs to be adapted to the specification of the channel 10 to be measured, so as to ensure that the positioning ball is tightly attached to the channel 10 to be measured, in view of this, the specification of the positioning ball 230 is multiple, the connecting seat 232 is a universal connecting seat 232, the positioning balls 230 of multiple specifications can be detachably connected to the universal connecting seat 232, so that on the premise that the universal connecting seat 232 and the first mounting seat 231 are not replaced, according to the specification of the channel 10 to be measured, the specification of the positioning ball 230 is correspondingly adjusted, so as to improve the bottom diameter detection accuracy of the channel 10 to be measured by improving the attachment degree of the channel 10 to be measured and the positioning.

In an alternative of this embodiment, the first mounting seat 231 may have a plurality of specifications, the first mounting seat 231 of each specification may be detachably connected to the frame body 20, and the first mounting seat 231 of each specification may be provided with a universal mounting portion detachably adapted to the universal connecting seat 232.

In an alternative of this embodiment, in order to realize that the detecting ball 220 can move toward or away from the positioning portion 23, the detecting part channel bottom diameter gauge 2 further includes a guiding portion 24, and the guiding portion 24 includes a guiding rod 240, a second mounting seat 241 and an elastic resetting piece 242.

The support body 20 is provided with a first guide through hole, the second mounting base 241 is connected with the support body 20, the second mounting base 241 is provided with a second guide through hole which is consistent with the guide direction of the first guide through hole, specifically, the guide direction is the perpendicular bisector direction of the two positioning bulbs 230, and the axes of the first guide through hole and the second guide through hole are collinear with the perpendicular bisector of the two positioning bulbs 230.

The first end of the guide rod 240 is detachably connected to the inspection ball 220 so as to facilitate replacement of the inspection ball 220 with excessive wear.

The second end of the guide rod 240 sequentially and radially fits into the first guide through hole and the second guide through hole, that is, the second end of the guide rod 240 sequentially and radially fits into the first guide through hole and the second guide through hole, and the guide rod 240 respectively and radially fits into the first guide through hole and the second guide through hole.

The meter body 210 is connected with the second mounting seat 241, the contact 211 extends into the second guiding through hole and abuts against the second end of the guiding rod 240, the first guiding through hole and the second guiding through hole provide guiding for the guiding rod 240 along the perpendicular bisector direction of the two positioning bulbs 230, so that the detecting bulb 220 and the guiding rod 240 are close to or far away from the positioning part 23 together, the contact 211 abutting against the guiding rod 240 is touched, and the reading is displayed on the meter body 210.

In the alternative of this embodiment, in order to detach this inspection device from the part that is measured, and to clamp this inspection device to the new part 1 that awaits measuring, part channel bottom diameter inspection device 2 still includes and stirs subassembly 26.

The toggle assembly 26 comprises a toggle rod 261 and a toggle handle 262 which are connected, one end of the toggle rod 261, which is connected with the toggle handle 262, is movably connected with the frame body 20, an avoiding groove is formed in the side portion of the second mounting seat 241, which faces the connecting position of the toggle handle 262 and the frame body 20, and penetrates through the first guide through hole and the second guide through hole at the same time, so that the part of the guide rod 240 is exposed through the avoiding groove, the other end of the toggle rod 261 extends into the avoiding groove and is connected with the guide rod 240, and the toggle handle 262 is pulled to enable the guide rod 240 to move along with the toggle rod 261.

Therefore, when the part 1 to be detected is replaced, the toggle rod 261 can be pulled to drive the guide rod 240 to retract into the first guide through hole by pulling the toggle handle 262, the detection ball head 220 is separated from the part which is detected, and a part taking and placing channel is avoided, so that the detected part can be smoothly taken out, and a new part 1 to be detected can be placed between the detection ball head 220 and the two positioning ball heads 230. Then, the toggle handle 262 is released, so that the detecting ball 220 and the two positioning balls 230 can clamp the new part 1 to be tested. This stir subassembly 26's simple structure, convenient operation provides the dismouting facility for batch measurement part 1 that awaits measuring, and can avoid the violence dismouting to cause the damage to accurate location bulb 230 and detection bulb 220, also plays the guard action promptly.

Optionally, the toggle assembly 26 further includes a hinge base 260 disposed on the frame 20, and an end of the toggle rod 261 connected to the toggle handle 262 is pivotally connected to the frame 20 through the hinge base 260.

In an alternative of this embodiment, the guiding portion 24 further includes a limiting protrusion 243, the limiting protrusion 243 is connected to the guiding rod 240, and protrudes outward along the radial direction of the guiding rod 240 relative to the portion of the guiding rod 240 that fits the second guiding through hole, so as to stop the portion between the first end of the guiding rod 240 and the limiting protrusion 243 from entering the second guiding through hole, thereby preventing the guiding rod 240 from being excessively retracted when the toggle assembly 26 is toggled, which is beneficial to protecting the detecting ball 220 from being knocked on the one hand, and protecting the contact 211 of the dial indicator 21 from being excessively touched on the other hand. The connecting position of the poke rod 261 and the guide rod 240 is located on one side of the limiting protrusion 243 deviating from the dial indicator 21, so that the influence of the poke rod 261 on the limiting effect of the limiting protrusion 243 is avoided.

Alternatively, the limit protrusion 243 may be a limit stopper or a limit cylinder, etc. protruded from the outer surface of the guide bar 240. Specifically, the position of the limit protrusion 243 is determined by referring to the touch stroke of the contact 211 and the position of the detection ball 220.

In an alternative of this embodiment, the elastic resetting element 242 includes a fixed cylinder 2420, a movable cylinder 2421 and an elastic element 2422, and the fixed cylinder 2420 and the movable cylinder 2421 are both cylinders with an opening at one end and a cylinder bottom at the other end.

The open end of the fixing cylinder 2420 is disposed in the second guiding through hole, that is, the fixing cylinder 2420 is fixedly connected with the second mounting base, at least the open end of the fixing cylinder 2420 is disposed in the second guiding through hole, the bottom of the fixing cylinder 2420 is provided with a first through hole, the contact 211 passes through the first through hole and extends into the fixing cylinder 2420, and the contact 211 can move relative to the fixing cylinder 2420.

The movable cylinder 2421 is slidably disposed through the fixed cylinder 2420, an opening of the movable cylinder 2421 faces a bottom of the fixed cylinder 2420, and the elastic element 2422 is supported between the cylinder of the movable cylinder 2421 and the bottom of the fixed cylinder 2420, so that under the action of the elastic element 2422, the movable cylinder 2421 and the fixed cylinder 2420 have a relative movement tendency of being disengaged from each other, and since the fixed cylinder 2420 is fixed relative to the second mounting base 241, all the elastic elements 2422 enable the movable cylinder 2421 to have a tendency of moving towards the side of the detection ball head 220.

The bottom of the movable cylinder 2421 is provided with a second through hole, the contact 211 passes through the first through hole and abuts against the second end of the guide rod 240, and the bottom of the movable cylinder 2421 is fixedly connected with the contact 211, so that the movable cylinder 2421 and the contact 211 can move synchronously, that is, the elastic element 2422 has an effect of enabling the contact 211 to push the guide rod 240 towards the side where the detection ball 220 is located all the time.

Therefore, on one hand, the elastic reset piece 242 is arranged, so that the detection ball head 220 can automatically attach and clamp the channel 10 to be measured, the measurement contingency caused by manual attachment and clamping can be reduced, and the measurement convenience and efficiency are improved; on the other hand, through the ingenious structure among the fixed cylinder 2420, the movable cylinder 2421, the elastic part 2422 and the contact 211, the directionality of the rebound action of the contact 211, the guide rod 240 and the detection ball head 220 can be effectively improved, and compared with the single use of the elastic part 2422, the detection error caused by the rebound inclination of the contact 211 and the guide rod 240 can be effectively reduced, so that the stability of the detection precision of the part channel bottom diameter detection tool 2 is improved.

Optionally, the end of the guide rod 240 abutting against the contact 211 is provided with a positioning groove, and the contact 211 is provided with a positioning protrusion adapted to the positioning groove to avoid the contact 211 from tilting in the radial direction of the guide.

Optionally, in order to avoid that the elastic resetting piece 242 makes the toggle assembly 26 automatically reset accidentally due to the fact that the worker accidentally releases the toggle handle 262 during the replacement process of the part 1 to be tested, a locking member for locking the toggle handle 262 may be further disposed on the frame body 20, for example, a clamping groove may be provided.

It will be appreciated that the end of the second guide through hole facing away from the first guide through hole can act as a stop and hold on the elastic element 2422, i.e. within the scope of the elastic return element of the present application. Wherein, the end of the second guiding through hole may form a stopper to realize the stopping and fixing of the elastic member 2422. Specifically, the stopper may be formed by a structure in which a stopper ring is provided at an end of the second guide through hole, and the elastic member 2422 is supported between the bottom of the movable cylinder 2421 and the stopper ring. In addition, the bottom of the fixed cylinder 2420 is another specific embodiment of the stopping portion disposed at the end of the second guiding through hole away from the first guiding through hole, and the stopping portion can be implemented by other specific structures, which are not described in detail herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention. Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Claims (10)

1. A part channel bottom diameter gauge is characterized by comprising a frame body, a dial indicator with a zero adjustment function, a detection part, a positioning part and a calibration gauge;

the size of a channel to be measured of the part to be measured takes the size of a calibration channel of the calibration gauge as a standard;

the detection part and the positioning part are connected to the frame body in a facing manner, the detection part can move relative to the frame body to be close to or far away from the positioning part, the positioning part can form a plurality of first contact points with any one of the channel to be detected or the calibration channel, the detection part can form a single second contact point with the channel, and a connecting line of the plurality of first contact points and the single second contact point surrounds the center of the channel;

the dial indicator comprises an indicator body and a contact, the indicator body is connected with the frame body, the reading of the indicator body is related to the touched amplitude of the contact, and the contact is abutted against the side part of the detection part, which is deviated from the positioning part, so that the contact can be touched by the detection part.

2. The part channel bottom diameter inspection device according to claim 1, wherein the positioning portion comprises two positioning bulbs connected to the frame body in a predetermined span, and the detection portion comprises one detection bulb, and the size and the shape of the detection bulb are identical to those of the positioning bulbs.

3. The part channel bottom diameter inspection device according to claim 2, wherein a perpendicular bisector of a connecting line of the centers of the two positioning bulbs passes through the center of the detection bulb.

4. The part channel bottom diameter inspection device according to claim 2, wherein the positioning portion further comprises a first mounting seat and a connecting seat, the positioning ball head is detachably connected with one end of the connecting seat, and the other end of the connecting seat is detachably connected with the first mounting seat.

5. The part channel bottom diameter inspection device according to claim 4, wherein the positioning ball heads are in various specifications, the connecting seat is a universal connecting seat, and the positioning ball heads in various specifications can be detachably connected with the universal connecting seat.

6. The part channel bottom diameter inspection device according to claim 5, wherein the first mounting seat is in multiple specifications, the first mounting seat of each specification is detachably connected with the frame body, and the first mounting seat of each specification is provided with a universal mounting part detachably matched with the universal connecting seat.

7. The part channel bottom diameter gauge according to claim 1, further comprising a guide part, wherein the guide part comprises a guide rod, a second mounting seat and an elastic resetting piece;

the frame body is provided with a first guide through hole, the second mounting seat is connected with the frame body, and the second mounting seat is provided with a second guide through hole which is consistent with the guide direction of the first guide through hole;

the first end of the guide rod is detachably connected with the detection part, and the second end of the guide rod sequentially and radially extends into the first guide through hole and the second guide through hole in a matched manner;

the meter body is connected with the second mounting seat, and the contact extends into the second guide through hole and is abutted against the second end of the guide rod.

8. The part channel bottom diameter gauge according to claim 7, further comprising a toggle assembly;

the poking assembly comprises a poking rod and a poking handle which are connected, one end of the poking rod, which is connected with the poking handle, is movably connected with the frame body, and an avoiding groove is formed in the side part, facing the connecting position of the poking handle and the frame body, of the second mounting seat, and penetrates through the first guide through hole and the second guide through hole simultaneously, so that part of the guide rod is exposed through the avoiding groove;

the other end of the poke rod extends into the avoiding groove and is connected with the guide rod, and the poke handle can enable the guide rod to move along with the poke rod.

9. The part channel bottom diameter gauge according to claim 7, wherein the guide portion further comprises a limiting protrusion connected to the guide rod and protruding outward in a radial direction of the guide rod relative to a portion of the guide rod adapted to the second guide through hole, so as to stop a portion between the first end of the guide rod and the limiting protrusion from entering the second guide through hole.

10. The part channel bottom diameter gauge according to claim 7, wherein the elastic reset piece comprises a movable cylinder and an elastic piece;

the movable cylinder body is slidably arranged in the second guide through hole in a penetrating mode, one end of the movable cylinder body is open, the other end of the movable cylinder body is provided with a cylinder bottom, and the cylinder bottom of the movable cylinder body is fixedly connected with the contact so that the movable cylinder body and the contact can move synchronously;

the opening of the movable cylinder body deviates from the first guide through hole, and the elastic part is supported between the cylinder bottom of the movable cylinder body and the end part of the second guide through hole, which deviates from the first guide through hole.

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