CN112344821A

CN112344821A - Wall thickness upper and lower limit synchronous detection type axle king pin hole inner sleeve detection device

Info

Publication number: CN112344821A
Application number: CN202011221084.3A
Authority: CN
Inventors: 陈学福; 何伟
Original assignee: Nanping Jianyang Auto Press Forging Factory
Current assignee: Fujian Tiechima Light Axle Co ltd
Priority date: 2019-07-20
Filing date: 2019-07-20
Publication date: 2021-02-09
Anticipated expiration: 2039-07-20
Also published as: CN112344821B; CN112344822A; CN112344822B; CN110487145A; CN110487145B

Abstract

The invention relates to a wall thickness upper and lower limit synchronous detection type axle main pin hole inner sleeve detection device, which comprises a lower comparison disc, an upper comparison disc, a rotating structure, a pressing structure, a supporting plate and a bottom plate, wherein the pressing structure, the supporting plate and the bottom plate are sequentially arranged from top to bottom, the lower comparison disc is provided with a vertical rotating shaft, an ejector rod penetrates through the lower comparison disc, the lower end of the upper comparison disc is provided with a vertical connecting shaft which is arranged in the lower comparison disc in a pluggable and penetrating mode, the vertical connecting shaft is provided with a conical surface section which is abutted against the ejector rod, the supporting plate is provided with two base plates which are provided with inner sleeve wall thickness comparison channels and circumferentially distributed along the vertical rotating shaft, the base plates penetrate through vertical guide rods which are connected to. The invention has the advantages of detecting the inner diameter and simultaneously detecting whether the wall thickness of each circumferential position meets the upper and lower limit values, and solves the problem that the wall thickness and the inner diameter are detected by different mechanisms, and the wall thickness is detected point by point along the circumferential direction of the inner sleeve by a vernier caliper.

Description

Wall thickness upper and lower limit synchronous detection type axle main pin hole inner sleeve detection device

The application is a divisional application with the name of a wall thickness upper and lower limit synchronous detection type axle main pin hole inner sleeve detection device on application number 2019106581415,

application date

2019, 7 and 20.

Technical Field

The invention relates to an axle checking fixture, in particular to an axle main pin hole inner sleeve detection device capable of synchronously detecting the upper limit and the lower limit of wall thickness.

Background

The vehicle axle of the automobile is provided with a front axle and a rear axle, wherein the front axle is used for mounting front wheels and supporting the weight of the front part of the automobile and is connected with a frame by a front suspension frame. A front axle of an automobile with a conventional structure is disclosed in chinese patent application No. 2011201792654, which is entitled "front axle assembly of an automobile" with publication date of 2011, 12 and 28. The automobile front axle comprises a cross rod and two cantilevers, a frame supporting part is arranged at each of two ends of the cross rod, the two cantilevers are connected with each of the two cross rods, and main pin holes are formed in the cantilevers. When the front wheel steering device is used, the steering knuckle is arranged in the main pin hole in a penetrating mode through the main pin and connected with the front shaft, and the front wheel is installed on the steering knuckle. The original automotive front axle suffers from the following disadvantages: the cross rod and the cantilever are of split structures and are connected together in a welding mode, so that the position between the cantilever and the cross rod is easy to deviate and not meet the requirement, and the yield is low; for the improvement of the company, the automobile front axle with a flat bottom casting structure is designed; however, the axle with the cast structure has the following defects: the king pin holes are susceptible to wear resulting in scrapping of the front axle. In order to solve the problem of wear of the main pin hole, the inner sleeve 1 shown in fig. 3 is designed to be installed in the main pin hole. The two end surfaces of the inner sleeve are inclined surfaces. In the production process of the inner sleeve, whether the wall thickness and the inner diameter are within a set range or not needs to be detected, namely whether the tolerance meets the standard or not. The wall thickness and the inner diameter of the existing inner sleeve are detected by different detection mechanisms, and the detection is troublesome; the wall thickness is detected by a vernier caliper to detect a plurality of circumferential points of the inner sleeve for judgment, and because the number of detection points is limited, when the part which does not meet the requirement is not sampled, misjudgment can be generated, and the accuracy in detection is poor.

Disclosure of Invention

The invention provides a wall thickness upper and lower limit synchronous detection type axle main pin hole inner sleeve detection device which can detect the inner diameter and can conveniently detect whether the wall thickness of each circumferential position meets the requirement, and solves the problem that wall thickness and inner diameter are detected through different mechanisms, and the wall thickness is detected point by point along the circumferential direction of an inner sleeve through a vernier caliper.

The technical problem is solved by the following technical scheme: a wall thickness upper and lower limit synchronous detection type axle main pin hole inner sleeve detection device comprises an inner diameter detection structure, a pressing structure, a supporting plate and a bottom plate which are sequentially arranged from top to bottom, wherein the inner diameter detection structure comprises a lower comparison disc, an upper comparison disc and a rotary structure for driving the lower comparison disc to rotate, the diameter of the lower comparison disc is the lower limit of the inner diameter of the inner sleeve, the diameter of the upper comparison disc is the upper limit of the inner diameter of the inner sleeve, the lower end of the lower comparison disc is provided with a vertical rotating shaft which is supported on the bottom plate and is rotatably connected to the supporting plate, the upper end of the lower comparison disc is provided with a vertical connecting hole, at least 3 ejector rods which radially extend along the circumferential distribution of the vertical rotating shaft are penetrated through the lower comparison disc, the rotary mechanism comprises a gear arranged on the vertical rotating shaft, a rack meshed with the gear and a translation mechanism for driving the rack to move back and forth, the lower end, the vertical connecting shaft is provided with a conical surface section which has a small lower end and a large upper end and is used for being abutted with the ejector rod to drive the ejector rod to be abutted to the inner sleeve sleeved on the lower comparison disc, the pressing structure comprises a pressing plate and a lifting mechanism for driving the pressing plate to press the upper comparison disc, the supporting plate is provided with two base plates which are distributed along the circumferential direction of the vertical rotating shaft, the base plates are penetrated by guide rods connected with the supporting plate, the guide rod is sleeved with an elastic sleeve which is arranged on the base plate in a penetrating way, the base plate is supported on the supporting plate through a spring, the base plates are provided with inner sleeve wall thickness comparison channels, the width of the inner sleeve wall thickness comparison channel on one base plate is equal to the upper limit value of the inner sleeve wall thickness, the width of the inner sleeve wall thickness comparison channel on the other base plate is equal to the lower limit value of the inner sleeve wall thickness, and the upper end of the inner sleeve wall thickness comparison channel with the width equal to the lower limit value of the inner sleeve wall thickness is provided with an inlet; when the inner sleeve with the inner diameter and the wall thickness meeting the design values is sleeved on the lower comparison disc, the inner sleeve wall thickness comparison channels on the two base plates can be aligned with the wall of the inner sleeve along the vertical direction. When the inner sleeve wall thickness comparison device is used, the inner sleeve is sleeved on the lower comparison disc, if the inner sleeve wall thickness comparison device can be sleeved, the lower limit protection requirement of the inner diameter is indicated, then the vertical connecting shaft is inserted into the vertical connecting hole, the inner sleeve is lifted to see whether the inner sleeve wall thickness comparison device can be sleeved on the upper comparison disc, if the inner diameter can not be indicated, the upper limit protection requirement of the inner diameter is met, when the inner diameter meets the requirement, the wall thickness comparison channel of the inner sleeve is aligned along the vertical direction, the comparison disc is pressed downwards through the pressing structure, so that the conical surface section moves downwards to drive the ejector rod to extend out and tightly prop against the inner circumferential surface of the inner sleeve, the wall of the inner sleeve is inserted into the inner sleeve wall thickness comparison channel, the width. The rotating mechanism drives the vertical rotating shaft to rotate 360 degrees so as to realize that the inner sleeve rotates 360 degrees, if the inner sleeve can pass through an inner sleeve wall thickness comparison channel with the width equal to the upper and lower values of the wall thickness of the inner sleeve in the process that the inner sleeve rotates 360 degrees and is not clamped by the inner sleeve wall thickness comparison channel, the inner sleeve wall thickness does not exceed the upper limit value, whether the wall of the inner sleeve can be inserted into the inner sleeve wall thickness comparison channel with the width equal to the lower limit value of the wall thickness of the inner sleeve or not is judged, and if the inner sleeve is not sleeved on the wall of the inner. The technical scheme can simultaneously detect that the upper part of the wall thickness of the inner sleeve is positioned between the upper limit value and the lower limit value. The setting of elastic sleeve for the distance of passageway distance vertical axis can be adjusted to the interior sleeve wall thickness ratio, thereby makes the internal diameter of endotheca no matter go up the deviation or down the deviation or even eccentric can all provide the dodge space of base plate translation through the deformation of elastic sleeve, makes the endotheca can insert interior sleeve wall thickness ratio and detect in the passageway.

Preferably, the inner sleeve wall thickness comparison channel is formed by a fixed stop block and a movable stop block which are arranged on the base plate in a surrounding mode, the fixed stop block and the movable stop block are distributed along the radial direction of the vertical rotating shaft, the movable stop block is connected to the base plate in a sliding mode along the radial direction of the vertical rotating shaft, and a movable stop block position adjusting mechanism is arranged on the base plate. When the device is used, the position of the movable stop block is adjusted by the movable stop block position adjusting mechanism to realize the adjustment of the wall thickness ratio of the inner sleeve to the width of the channel, so that the device can be suitable for detecting inner sleeves with different wall thickness ranges, and is universal.

Preferably, the movable stop position adjusting mechanism comprises a rotary table abutted against one side of the movable stop far away from the fixed stop, the rotary table is eccentrically provided with a vertical rotating shaft, and the vertical rotating shaft is in threaded connection with the supporting plate. When the device is used, the rotating disc is rotated to drive the movable stop block, so that the wall thickness of the inner sleeve is adjusted to the width of the channel. The adjustment is convenient.

Preferably, the fixed stop block is positioned between the vertical rotating shaft and the movable stop block, and the movable stop block position adjusting mechanism is positioned on one side of the movable stop block, which is far away from the fixed stop block. When the wall thickness of the inner sleeve is adjusted to be larger than the width of the channel, the inner sleeve does not need to be taken down, and the use is convenient.

Preferably, the fixed stop block is positioned between the vertical rotating shaft and the movable stop block, the fixed stop block is cylindrical, and the surface of the movable stop block facing to one side of the fixed stop block is a radial vertical plane perpendicular to the vertical rotating shaft. No matter how large the inner diameter and the outer diameter of the inner sleeve are, the stop block cannot interfere the inner sleeve to be inserted into the inner sleeve wall thickness comparison channel.

Preferably, an elastic layer is arranged at one end of the ejector rod. The design of elastic layer for no matter the internal diameter is upper deviation or lower deviation, can both provide the radial translation of endotheca and dodge the space for the deformation through the elastic layer, make the endotheca wall thickness compare the passageway can not block the endotheca and lead to the endotheca can not produce the rotation and produce the erroneous judgement when the wall thickness meets the requirements.

Preferably, the elastic layer is a rubber layer. Not only can elastically deform, but also has good reliability when the inner sleeve can rotate along with the comparison turntable.

Preferably, the vertical rotating shaft is supported on the base plate through a plane bearing.

Preferably, the lower surface of the pressing plate is provided with a plurality of pressing rolling balls.

The invention has the following advantages: the wall thickness and the inner diameter of the inner sleeve can be conveniently detected, and the detection is convenient and has good accuracy; the upper and lower limit values can be detected simultaneously during wall thickness detection.

Drawings

Fig. 1 is a schematic view of the present invention in use.

Fig. 2 is a schematic top view of the present invention with the pressing structure and the upper comparison turntable removed.

Fig. 3 is a schematic cross-sectional view of the inner sleeve.

In the figure: the device comprises an inner sleeve 1, a pressing structure 2, a supporting plate 3, a bottom plate 4, a lower comparison disc 5, an upper comparison disc 6, a rotating structure, a vertical rotating shaft 8, a vertical connecting hole 9, a plane bearing 10, an ejector rod 11, an elastic layer 12, a gear 13, a rack 14, a translation mechanism 15, a vertical connecting shaft 16, a conical section 17, a pressing plate 18, a lifting mechanism 19, a pressing rolling ball 20, a vertical guide rod 21, a spring 22, a movable stop block 23, an inner sleeve wall thickness comparison channel 24, an introducing port 25, a surface 26 of the movable stop block facing one side of the fixed stop block, a rotary table 27, a vertical rotating shaft 28, a threaded through hole 29, a wall 30 of the inner sleeve, a fixed stop block 31, a movable stop block position adjusting mechanism 32, a.

Detailed Description

The invention is further described with reference to the following figures and examples.

Referring to fig. 1 and 2, the synchronous detection type axle main pin hole inner sleeve detection device for detecting the upper and lower limits of the wall thickness comprises an inner diameter detection structure, and a pressing structure 2, a supporting plate 3 and a bottom plate 4 which are sequentially arranged from top to bottom. The inner diameter detection structure comprises a lower comparison disc 5, an upper comparison disc 6 and a rotating structure 7 for driving the lower comparison disc to rotate. The diameter of the lower comparison disc is the lower limit value of the inner diameter of the inner sleeve 1. The diameter of the upper comparison disc is the upper limit value of the inner diameter of the inner sleeve. The upper end surface of the lower comparison disc is a convex conical surface, so that the inner sleeve can be conveniently sleeved on the lower comparison disc. The lower end of the lower comparison disc is provided with a vertical rotating shaft 8 which is supported on the bottom plate and is rotatably connected on the supporting plate, and the upper end of the lower comparison disc is provided with a vertical connecting hole 9. The vertical rotating shaft is coaxial with the upper comparison disc. The vertical rotating shaft is rotatably connected to the supporting plate and penetrates through the supporting plate. The lower end of the vertical shaft is supported on the base plate by a flat bearing 10. The vertical connecting hole is coaxial with the vertical rotating shaft. The lower comparison disc is provided with 3 mandrils 11 which are distributed along the circumferential direction of the vertical rotating shaft and extend radially. The 3 rotating shafts are uniformly distributed along the circumferential direction of the lower comparison disc. The outer end of the ejector rod, namely the end far away from the vertical rotating shaft, is provided with an elastic layer 12. The elastic layer is of a rubber structure. The ejector pin can be compared the disc and go up horizontal migration down. The rotating mechanism comprises a gear 13 arranged on the vertical rotating shaft, a rack 14 meshed with the gear and a translation mechanism 15 driving the rack to translate back and forth. The translation mechanism is a cylinder. The lower end of the upper comparison disc is provided with a vertical connecting shaft 16 which is arranged in the vertical connecting hole in a penetrating way in a pulling way. The upper end of the vertical connecting shaft is provided with a conical section 17 with a small lower end and a large upper end. The conical surface section 17 is integrated with the inner end motor of the ejector rod. When the comparison disc moves downwards, the conical surface section drives the ejector rod to extend out, the upper end ejector rod is tightly propped against the inner circumferential surface of the inner sleeve through the elastic layer, and the upper end inner sleeve can rotate along with the lower comparison disc. The pressing structure comprises a pressing plate 18 and a lifting mechanism 19 for driving the pressing plate to press the upper comparison disc. The lifting mechanism is a cylinder. The lower surface of the pressing plate is provided with a plurality of pressing rolling balls 20. Two vertical guide rods 21 are arranged on the supporting plate. Each vertical guide rod is sleeved with a base plate 33. The vertical guide rod is sleeved with an elastic sleeve 34. The elastic sleeve is a rubber sleeve. The elastic sleeve is isolated between the vertical guide rod and the base. The base plate is supported on the pallet by springs 22. The supporting plate is fixedly connected with the bottom plate. The spring is a pressure spring. The base plate is provided with a fixed stopper 31 and a movable stopper 23. An inner sleeve wall thickness ratio channel 24 is formed between the fixed stop block and the movable stop block. The upper end of the inner sleeve wall thickness ratio channel is provided with a leading-in port 25. The wall thickness ratio of two inner sleeves is distributed along the circumferential direction of the vertical rotating shaft. The fixed stop blocks and the movable stop blocks are distributed along the radial direction of the vertical rotating shaft. The fixed stop block is positioned between the vertical rotating shaft and the movable stop block. The fixed stop block is cylindrical. The surface 26 of the movable stopper facing the fixed stopper is a vertical plane perpendicular to the radial direction of the vertical rotation axis. The movable stop block is connected on the supporting plate in a sliding manner along the radial direction of the rotating shaft. The supporting plate is provided with a movable stop position adjusting mechanism 32. The movable stop block position adjusting mechanism is positioned on one side of the movable stop block, which is far away from the fixed stop block. The movable stop position adjustment mechanism comprises a rotary disc 27 abutting on the side of the movable stop remote from the fixed stop. The turntable is eccentrically provided with a vertical rotation shaft 28. The vertical rotating shaft and the fixed stop blocks are distributed along the radial direction of the vertical rotating shaft. The vertical rotating shaft is connected in the threaded through hole 29 on the supporting plate in a threaded manner. When the inner sleeve 1 with the inner diameter and the wall thickness meeting the design values is sleeved on the lower comparison disc, the wall 30 of the inner sleeve can be inserted into the inner sleeve wall thickness comparison channel or aligned with the inner sleeve wall thickness channel along the up-down direction.

When the device is used, the width from the inner sleeve wall thickness comparison channel to an inner sleeve wall thickness comparison channel (the inner sleeve wall thickness comparison channel at the left end in the figure 1) is adjusted to be equal to the upper limit value of the inner sleeve wall thickness, and the width of the other inner sleeve wall thickness comparison channel (the inner sleeve wall thickness comparison channel at the right end in the figure 1) is adjusted to be equal to the lower limit value of the inner sleeve wall thickness (the method for adjusting the inner sleeve wall thickness comparison channel is that a rotating disc is rotated by taking a vertical rotating shaft as a shaft to adjust the position of a rotating block); and sleeving the inner sleeve 1 on the lower comparison disc, wherein if the inner sleeve can be sleeved, the protection requirement of the lower limit value of the inner diameter is indicated, otherwise, the lower limit value of the inner sleeve does not meet the requirement. And then inserting the vertical connecting shaft into the vertical connecting hole, lifting the inner sleeve to see whether the inner sleeve can be sleeved on the upper comparison disc, if not, indicating that the upper limit value of the inner diameter meets the requirement, otherwise, indicating that the upper limit value of the inner diameter of the inner sleeve does not meet the requirement. When the inner diameter meets the requirement, the pressing structure presses the upper comparison disc downwards to enable the conical surface section to drive the ejector rod to abut against the inner circumferential surface of the inner sleeve, and at the moment, if the wall thickness of the inner sleeve meets the requirement, the wall of the inner sleeve is inserted into the sleeve wall thickness comparison channel at the left end in the figure 1 and is aligned with the inner sleeve wall thickness comparison channel at the right end in the figure 1, namely, the inner sleeve is positioned in the lead-in port and cannot be inserted. The rotating mechanism drives the vertical rotating shaft to rotate 360 degrees so as to rotate 360 degrees of the inner sleeve, if the inner sleeve can pass through the inner sleeve wall thickness comparison channel positioned at the left end of the graph 1 and cannot be clamped in the inner sleeve rotating process of 360 degrees, the wall thickness of the inner sleeve does not exceed the upper limit value, whether the base plate can be jacked by the spring is seen in the rotating process of 360 degrees, the inner sleeve wall thickness comparison channel positioned at the right end is sleeved on the wall of the inner sleeve, if the base plate is not sleeved on the inner sleeve wall in the whole rotating process, the lower limit value of the wall thickness of the inner sleeve meets the requirement, and otherwise, the lower limit value of the wall thickness of the inner sleeve does.

Claims

1. A wall thickness upper and lower limit synchronous detection type axle king pin hole inner sleeve detection device is characterized in that, comprising an inner diameter detection structure and a pressing structure, a support plate and a bottom plate arranged in sequence from top to bottom, the inner diameter detection structure Including a lower comparison disc, an upper comparison disc and a rotating structure that drives the lower comparison disc to rotate, the diameter of the lower comparison disc is the lower limit of the inner diameter of the inner sleeve, and the upper comparison disc has a The diameter is the upper limit of the inner diameter of the inner sleeve, the lower end of the lower comparison disc is provided with a vertical shaft supported on the bottom plate and rotatably connected to the pallet, and the upper end is provided with a vertical connection hole, and the lower comparison disc is provided with a vertical shaft. There are at least 3 ejector rods extending radially along the circumference of the vertical axis, and the rotating mechanism includes a gear arranged on the vertical axis, a rack meshed with the gear, and a translation mechanism that drives the rack to translate back and forth, The lower end of the upper comparison disc is provided with a vertical connection shaft that can be pulled out and penetrated in the vertical connection hole, and the vertical connection shaft is provided with a small lower end and a large upper end for abutting with the ejector rod. The driving top rod is abutted against the conical surface section on the inner sleeve sleeved on the lower comparison disc, and the pressing structure includes a pressing plate and a lifting mechanism that drives the pressing plate to press the upper comparison disc. The support plate is provided with two base plates distributed along the circumference of the vertical rotation axis, the base plate is provided with a vertical guide rod connected to the support plate, and the vertical rod is sleeved with an elastic sleeve passed through the base plate, The base plate is supported on the support plate by a spring, the base plate is provided with an inner sleeve wall thickness ratio channel, and the width of the inner sleeve wall thickness ratio channel on one base plate is equal to the upper limit of the inner sleeve wall thickness, The inner sleeve wall thickness ratio on the other substrate is equal to the lower limit value of the inner sleeve wall thickness ratio to the width of the channel, and the upper end of the inner sleeve wall thickness ratio pair channel with the width equal to the lower limit value of the inner sleeve wall thickness is provided with an inlet; the inner diameter When the inner sleeve with the wall thickness conforming to the design value is sleeved on the lower comparison disc, the inner sleeve wall thickness comparison channel on the two substrates can be aligned with the wall of the inner sleeve along the up-down direction; The vertical rotation shaft is supported on the base plate through a plane bearing.

2 . The inner sleeve detection device of the axle king pin hole of the synchronous detection type of wall thickness upper and lower limits according to claim 1 , wherein the inner sleeve wall thickness comparison channel is composed of a fixed block and a movable block arranged on the base plate. 3 . The block is enclosed, the fixed block and the movable block are distributed along the radial direction of the vertical axis, the movable block is slidably connected to the base plate along the radial direction of the vertical axis, and the base plate is provided with a position adjustment of the movable block mechanism.

3 . The detection device for the inner sleeve of an axle king pin hole of synchronous detection of the upper and lower limits of wall thickness according to claim 2 , wherein the movable block position adjustment mechanism comprises a distance away from the fixed block abutting on the movable block. 4 . A turntable on one side of the turntable, the turntable is eccentrically provided with a vertical rotation shaft, and the vertical rotation shaft is threadedly connected to the support plate.

4 . The detection device for the inner sleeve of an axle king pin hole of a synchronous detection type of wall thickness upper and lower limits according to claim 2 or 3, wherein the fixed stop is located between the vertical rotation shaft and the movable stop, and the movable stop The block position adjustment mechanism is located on the side of the movable block away from the fixed block.

5 . The detection device for the inner sleeve of the king pin hole of an axle of a type of synchronous detection of the upper and lower limits of the wall thickness according to claim 2 or 3, wherein the fixed stop is located between the vertical rotation shaft and the movable stop, and the fixed stop The block is cylindrical, and the surface of the movable block facing the side of the fixed block is a vertical plane perpendicular to the radial direction of the vertical rotation axis.

6 . The detection device for the inner sleeve of the king pin hole of an axle of a synchronous detection type of the upper and lower limits of the wall thickness according to claim 1 , 2 or 3 , wherein an elastic layer is provided on one end of the ejector rod.