Electric thread detection machine

Abstract

The utility model discloses an electric thread detector. A lifting mechanism, a cantilever, an electric screwdriver and a visual console are arranged on a base. The electric screw driver is installed at one end of the sliding rod, the cantilever is elastically suspended on the adjusting rod through the inclined tension spring, the cantilever is controlled to ascend and descend rapidly through the driving component, and therefore the approximate working height of the electric screw driver is adjusted rapidly, the cantilever moves downwards by stretching the inclined tension spring, and operation of the electric screw driver is in a non-weight state. The labor intensity of operators is greatly reduced, and the labor production efficiency is improved. The electric screw driver is assembled in the universal joint bearing, so that the angle of the electric screw driver can be universally adjusted, a thread detection tool can be buffered and aligned when entering a threaded hole, the thread detection tool can be conveniently aligned with a workpiece, a plug gauge can smoothly enter the threaded hole, jamming is avoided, and operation is convenient. And thread detection of different angles and deep groove threaded holes can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of thread detection, in particular to an electric thread detector. Background Art

[0002] Thread connection is an important way of fixed connection in the field of machining. For parts involving thread connection, it is crucial to detect whether the thread is qualified after machining.

[0003] After a workpiece with internal or external threads is manufactured, it is necessary to detect whether the thread is manufactured qualified. Generally, a thread plug gauge is screwed into and out of the internal thread to be detected, and a thread ring gauge is screwed into and out of the external thread to be detected to detect whether the internal and external threads are qualified. And this kind of detection is generally carried out manually. For each detection of an internal or external thread, it needs to be manually screwed in and out, and each detection takes dozens of seconds or even longer, resulting in low detection efficiency. After long-term operation, people's hands are very sore, which is not conducive to physical health. And because of the sore hands, the tools are often put down to rest, resulting in more time waste.

[0004] A device for detecting machined internal threads is disclosed in the Chinese utility model patent CN202021303196.9, which includes a fixed rod vertically fixed on a workbench. A spring balancer is fixed at the upper end of the fixed rod. A lifting mechanism is sleeved on the fixed rod and is located below the spring balancer. At the same time, the lifting mechanism is fixedly connected to the end of the spring in the spring balancer. A bolt detection tool is fixed at one end of the lifting mechanism far away from the fixed rod. Instead of using hands to "hold" the bolt transfer tool, the bolt is screwed into and out of the internal thread to be detected by the forward and reverse rotation of the bolt transfer tool, improving work efficiency and liberating both hands. However, the device has the following drawbacks when in use:

[0005] First, since the bolt transfer tool is fixed on the lifting mechanism, the bolt transfer tool can only move vertically up and down, and the angle is not adjustable, so that it can only detect the vertical threaded holes on the workpiece and cannot detect the inclined threads. Moreover, the movement of the bolt detection tool itself is limited, and it cannot detect the threaded holes in the deep cavity, resulting in limited detection range;

[0006] Second, the bolt detection tool is fixed on the lifting mechanism. When the stud enters the threaded hole, there is no fine-tuning buffer amount, which easily causes jamming between the bolt detection tool and the threaded hole, affecting the detection. Summary of the Utility Model

[0007] The technical problem to be solved by the utility model is to provide an electric thread detector adopting an elastic cantilever type to reduce the manual labor intensity.

[0008] To solve the above technical problems, the technical solution adopted by the utility model is:

[0009] An electric thread detector, characterized by comprising:

[0010] A base, horizontally arranged;

[0011] A lifting mechanism, including a column vertically fixed on the upper surface of the base, a lifting block slidably connected to the column, the lifting block being connected with a driving member for driving it to lift up and down along the column, a bracket being fixed to the side of the lifting block, a vertical adjusting rod being fixed on the bracket, a slider being rotatably and slidably arranged on the adjusting rod, a horizontal sliding hole being provided on the slider, and a diagonal tension spring being connected between the slider and the adjusting rod above it;

[0012] A cantilever, horizontally arranged, including a sliding rod, the sliding rod being slidably connected in the sliding hole and restricted from rotating, the sliding rod being located behind the column, a limiting block for restricting it from disengaging from the sliding track being fixed at one end of the sliding rod, an installation seat being fixed at the other end, a vertically downward installation hole being provided in the installation seat, a rotary bearing being assembled in the installation hole, and a universal joint bearing being assembled in the inner ring of the rotary bearing;

[0013] An electric screwdriver, inserted into the universal joint bearing, the working end of the electric screwdriver being arranged downward, a thread detection tool being detachably fixed at the lower end of the electric screwdriver; and

[0014] A visual console, the control output end of the visual console being connected to the driving member.

[0015] A further technical solution lies in that the driving member includes a screw rod rotatably fixed on the column, a motor for driving its rotation being fixed at the upper end of the screw rod, a nut sleeve being threadedly connected to the screw rod, the nut sleeve being fixed to the lifting block and restricted from rotating, and the motor being connected to the control output end of the visual console.

[0016] A further technical solution lies in that the screw rod is rotatably located inside the column, a vertical sliding track communicating with its inside being provided on the surface of the column, a sliding plate extending outward from the sliding track being fixed on the nut sleeve, and the sliding plate being fixed to the lifting block.

[0017] A further technical solution lies in that a first sensor for detecting the upper limit position of the lifting block rising is fixed at the upper end of the column, a second sensor for detecting the lower limit position of the lifting block descending is fixed at the lower end of the column, and both the first sensor and the second sensor are connected to the signal input end of the visual console.

[0018] A further technical solution lies in that a counter is further included, and the counter is connected to the controller of the electric screwdriver.

[0019] A further technical solution is that a fixed sleeve is provided on the upper sleeve of the adjusting rod, and a sliding sleeve is provided on the lower sleeve. The fixed sleeve can rotate, move and lock downward along the adjusting rod, and the sliding sleeve can rotate and move along the adjusting rod. The sliding sleeve is fixed to the slider, and an inclined tension spring is connected between the slider and the fixed sleeve.

[0020] A further technical solution is that the fixing sleeve comprises a rotating sleeve and an optical axis quick lock located below the rotating sleeve.

[0021] A further technical solution is that a thrust bearing is provided between the rotating sleeve and the optical axis quick lock.

[0022] A further technical solution is that a buffer spring is sleeved on the adjusting rod, and the buffer spring is located between the sliding sleeve and the fixed sleeve, and both ends of the buffer spring are freely arranged.

[0023] A further technical solution is that the outer ring of the rotary bearing has a first top screw that can be screwed inwards to press against the inner ring to rotate and lock it; the outer ring of the universal joint bearing has a second top screw that can be screwed inwards to press against the inner ring to rotate and lock it.

[0024] The beneficial effects of adopting the above technical solution are:

[0025] The electric thread detection machine installs an electric screwdriver on one end of a sliding rod, uses an inclined tension spring to elastically suspend a cantilever on an adjusting rod, controls the cantilever to quickly rise and fall through a driving component, thereby quickly adjusting the approximate working height of the electric screwdriver, and then moves the cantilever downward by stretching the inclined tension spring, so that the operation of the electric screwdriver is in a weightless state, which greatly reduces the labor intensity of the operator and improves the labor production efficiency.

[0026] The electric screwdriver is assembled in a universal joint bearing, so that the angle of the electric screwdriver can be universally adjusted, so that the thread detection tool can be buffered and aligned when entering the threaded hole or threaded column, which is convenient for aligning the thread detection tool with the workpiece and allowing the plug gauge to smoothly enter the screw hole or stud to avoid jamming. It is easy to operate and can detect threads of threaded holes with different angles and deep grooves.

[0027] In addition, a rotary bearing is also provided outside the universal joint bearing, so that the electric screwdriver can rotate with the universal joint bearing when rotating, thereby avoiding friction between the electric screwdriver and the universal joint bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Figure 1 It is a main structural schematic diagram of the utility model;

[0030] Figure 2 This is a schematic rear view structure of the utility model. Specific embodiments

[0031] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present utility model.

[0032] In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0033] As Figures 1 to 2 shown, an electric thread detector includes a base 10, on which a lifting mechanism, a cantilever, an electric screwdriver 40 and a visual console 50 are provided.

[0034] The base 10 is horizontally arranged, and each component of the electric thread detector is integrated through the base 10. Handles are fixed at both ends of the upper surface of the base 10 for facilitating the handling of the device.

[0035] The lifting mechanism includes a column 21 vertically fixed on the upper surface of the base 10. A lifting block 22 is slidably connected to the column 21. The lifting block 22 is connected to a driving member for driving it to move up and down along the column 21. Specifically, the driving member includes a screw rod rotatably fixed on the column 21. The upper end of the screw rod is fixed with a motor for driving its rotation. A nut sleeve is threadedly connected to the screw rod. The nut sleeve is fixed to the lifting block 22 and is restricted from rotating. Preferably, the screw rod is rotatably located inside the column 21 through a bearing, and a vertical slideway 211 communicating with its interior is opened on the surface of the column 21. A slide plate extending outward from the slideway 211 is fixed on the nut sleeve, and the slide plate is fixed to the lifting block 22. After the motor is started, it drives the screw rod to rotate. Since the nut sleeve is restricted from rotating by the slide plate and the slideway 211, the nut sleeve only makes a vertical displacement, thereby driving the lifting block 22 to move up and down.

[0036] A bracket 23 is fixed on the side of the lifting block 22. A vertical adjusting rod 24 is fixed on the bracket 23. A slider 25 is rotatably and vertically slidably arranged on the adjusting rod 24. A horizontal sliding hole is provided on the slider 25. A diagonal tension spring 26 is connected between the slider 25 and the adjusting rod 24 above it.

[0037] The cantilever is horizontally arranged and includes a sliding rod 31. The sliding rod 31 is slidably connected in a sliding hole. By setting the shape of the sliding rod 31 to be non-circular or arranging two parallel sliding rods 31, the rotation of the sliding rod 31 in the sliding can be restricted, so that the sliding rod 31 only makes horizontal displacement. At the same time, due to the rotatable setting of the slider 25, the whole sliding rod 31 can also rotate along the adjusting rod 24. In order not to affect the rotation of the sliding rod 31, the sliding rod 31 is arranged behind the column 21, and a limiting block for restricting it from disengaging from the sliding track 211 is fixed at one end of the sliding rod 31.

[0038] At the other end of the sliding rod 31, a mounting seat for installing an electric screwdriver 40 is fixed. The mounting seat is provided with a vertically downward mounting hole. A rotary bearing is assembled in the mounting hole, and a universal joint bearing is assembled in the inner ring of the rotary bearing. The electric screwdriver 40 is inserted into the universal joint bearing. The working end of the electric screwdriver 40 is arranged downward. A thread detection tool 41 is detachably fixed at the lower end of the electric screwdriver 40. The internal thread of the workpiece is detected by screwing a thread plug gauge in and out, and the external thread of the workpiece is detected by screwing a thread ring gauge in and out.

[0039] The electric screwdriver 40 is assembled in the universal joint bearing, so that the angle of the electric screwdriver 40 can be adjusted in all directions, enabling the thread detection tool 41 to buffer and align when entering the thread hole, facilitating the alignment of the thread detection tool 41 with the workpiece, allowing the plug gauge to smoothly enter the screw hole, avoiding jamming, being convenient to operate, and capable of detecting threads of different angles and deep groove thread holes.

[0040] In addition, a rotary bearing is also arranged outside the universal joint bearing, enabling the electric screwdriver 40 to drive the universal joint bearing to rotate together when rotating, avoiding friction between the electric screwdriver 40 and the universal joint bearing.

[0041] A hexagon quick-change chuck is installed at the lower end of the electric screwdriver 40. The hexagon quick-change chuck is a prior art and will not be elaborated here. The hexagon quick-change chuck can be installed at the working end of the electric screwdriver 40. The hexagon quick-change chuck and the thread detection tool 41 are connected through an adapter. The adapter includes a hexagon rod assembled with the hexagon quick-change chuck and a fixing cap assembled with the thread plug. After the end of the thread detection tool 41 extends into the fixing cap, it is fixed tightly by a side screw. The hexagon quick-change chuck and the adapter can be quickly disassembled and assembled, and the thread detection tool 4131 and the adapter can also be disassembled, thus realizing the installation of different specifications of thread plug gauges and thread ring gauges at the working end of the electric screwdriver 40.

[0042] In addition, a stepped sleeve can also be fixed in the universal joint bearing. The large end of the stepped sleeve faces upward. The electric screwdriver 40 is fitted with the inner hole of the stepped sleeve, and the downward movement of the electric screwdriver 40 is restricted by the stepped hole. This facilitates the installation and removal of the electric screwdriver 40 and is conducive to replacing different specifications of thread detection tools 41.

[0043] The angle of the electric screwdriver 40 can also be locked. There is a first set screw 42 on the outer ring of the rotating bearing that can be screwed inwards to abut against its inner ring to lock its rotation. There is a second set screw 43 on the outer ring of the universal joint bearing that can be screwed inwards to abut against its inner ring to lock its rotation. When batch inspecting workpieces of the same model, there will be a same inclination angle for the threaded holes on all the workpieces. When inspecting the first part, loosen the set screws to make the electric screwdriver 40 rotate freely. After the thread detection tool 41 enters the threaded hole or threaded post, that is, at this time the angle of the thread is determined. Then tighten the two set screws to fix the angle of the thread detection tool 41, so that the angle of the thread detection tool 41 precisely matches the angle of the threaded hole to be measured, avoiding multiple positioning and alignment, and further improving the detection efficiency.

[0044] The control output end of the visual console 50 is connected to the motor in the driving member. The operator can operate through the visual console 50 to control the lifting of the cantilever. Moreover, in order to avoid collisions during the lifting of the lifting block 22, a first sensor 1 for detecting the upper limit position of the lifting of the lifting block 22 is fixed at the upper end of the column 21, and a second sensor 2 for detecting the lower limit position of the descent of the lifting block 22 is fixed at the lower end of the column 21. Both the first sensor 1 and the second sensor 2 are connected to the signal input end of the visual console 50. When the first sensor 1 and the second sensor 2 detect that the lifting block 22 reaches the limit height, they transmit signals to the visual console 50, and the visual console 50 controls the motor to stop.

[0045] For this electric thread detection machine, the electric screwdriver 40 is installed at one end of the sliding rod 31. The cantilever is elastically suspended on the adjusting rod 24 by the inclined tension spring 26. The driving member is used to control the rapid lifting of the cantilever, so as to quickly adjust the approximate working height of the electric screwdriver 40. By stretching the inclined tension spring 26, the cantilever is moved downwards to make the operation of the electric screwdriver 40 in a weightless state, greatly reducing the labor intensity of the operator and improving the labor productivity.

[0046] This electric thread detection machine also includes a counter 3. The counter 3 is connected to the controller of the electric screwdriver 40. The controller of the electric screwdriver 40 transmits the start-up times of the electric screwdriver 40 to the counter 3 for counting and statistics. On the one hand, the workload of the staff can be roughly obtained; on the other hand, the service life of the thread detection tool 41 can be recorded.

[0047] In addition, the electric thread detector further includes a missed inspection structure. Specifically, a missed inspection sensor for detecting whether a workpiece is placed on the workbench (detection area) is provided on the base, such as an infrared sensor or a distance sensor. The missed inspection sensor is connected to the controller of the electric screwdriver 40. The staff pre-sets the number of threads to be detected on a single workpiece to be detected in the controller of the electric screwdriver 40, and the controller of the electric screwdriver 40 is also connected to a buzzer alarm. During actual operation, the workpieces are batch-detected with the same specifications. The staff pre-sets the number of threads to be detected on a single workpiece to be detected as N in the controller. After the missed inspection sensor detects that a workpiece is placed in the detection area, it feeds back a signal to the controller of the electric screwdriver 40, and then the controller of the electric screwdriver 40 starts to record the actual number of threads N1 detected by the electric screwdriver 40. When N1 is less than N and the missed inspection sensor detects that the workpiece has moved out of the detection area, the controller of the electric screwdriver 40 controls the buzzer alarm to prompt the staff that there is a missed inspection situation. When N1 is equal to N, the count is cleared. When the missed inspection sensor detects that a new workpiece is placed in the detection area again, a new missed inspection monitoring starts.

[0048] The height of the cantilever can also be finely adjusted. A fixed sleeve is sleeved above the adjusting rod 24, and a sliding sleeve 27 is sleeved below. The fixed sleeve can rotate, move and be locked downward on the adjusting rod 24 freely through a linear bearing. The sliding sleeve 27 can rotate and move along the adjusting rod 24. The sliding sleeve 27 is fixed to the slider 25, and a diagonal tension spring 26 is connected between the slider 25 and the fixed sleeve.

[0049] The fixed sleeve includes a rotating sleeve 281 and a quick shaft lock 282 located below it. There is no connection relationship between the rotating sleeve 281 and the quick shaft lock 282. The quick shaft lock 282 is a prior art and will not be elaborated here. The quick shaft lock 282 can move to any position along the adjusting rod 24 and then be locked, thereby restricting the downward movement of the rotating sleeve 281. The downward limit of the fixed sleeve is realized through the quick shaft lock 282. Ensure that when pressing down the cantilever, the fixed sleeve is fixed downward and does not move.

[0050] A thrust bearing 283 is also provided between the rotating sleeve 281 and the quick shaft lock 282. The thrust bearing 283 can rotate and move up and down on the adjusting rod 24. Due to the setting of the thrust bearing 283, the friction force on the lower end surface of the rotating sleeve 281 during rotation can be reduced, making its rotation more flexible.

[0051] A buffer spring 29 is sleeved on the adjusting rod 24. The buffer spring 29 is located between the sliding sleeve and the fixed sleeve, and both ends thereof are freely arranged. This enables elastic buffering of the cantilever in the height direction, reduces the reciprocating vibration of the electric screwdriver 40 after withdrawing from the workpiece, thereby further reducing the holding force of the operator on the electric screwdriver 40 and reducing the labor intensity of the operator. In addition, the setting of the buffer spring 29 can balance the weight of the hand during the operation of the staff, buffer the downward pressure of the electric screwdriver 40, and also play a role in fine adjustment, enabling the electric screwdriver 40 to quickly approach the threaded hole of the workpiece to be measured and accurately dock.

[0052] The above are only the preferred embodiments of the present invention. Any simple modifications, deformations and equivalent replacements made to the present invention by anyone according to the content of the present invention fall within the protection scope of the present invention.

Claims

1. An electric thread detector, characterized in that, Comprising: A base (10), horizontally arranged; A lifting mechanism, including a column (21) vertically fixed on the upper surface of the base (10), a lifting block (22) slidably connected to the column (21), the lifting block (22) being connected to a driving member for driving it to move up and down along the column (21), a bracket (23) fixed to the side of the lifting block (22), a vertical adjusting rod (24) fixed to the bracket (23), a slider (25) rotatably and slidably arranged on the adjusting rod (24), the slider (25) having a horizontal sliding hole, and a diagonal tension spring (26) connected between the slider (25) and the adjusting rod (24) above it; A cantilever, horizontally arranged, including a sliding rod (31), the sliding rod (31) being slidably connected in the sliding hole and restricted from rotating, the sliding rod (31) being located behind the column (21), one end of the sliding rod (31) being fixed with a limit block for preventing it from disengaging from the sliding track (211), the other end being fixed with a mounting seat, the mounting seat being provided with a vertically downward mounting hole, a rotary bearing being assembled in the mounting hole, and a universal joint bearing being assembled in the inner ring of the rotary bearing; An electric screwdriver (40), inserted into the universal joint bearing, the working end of the electric screwdriver (40) being arranged downward, and a thread detection tool (41) being detachably fixed to the lower end of the electric screwdriver (40); and A visual control console (50), the control output end of the visual control console (50) being connected to the driving member.

2. The electric thread detector according to claim 1, wherein The driving member includes a screw rod rotatably fixed to the column (21), a motor for driving the rotation of the screw rod being fixed to the upper end of the screw rod, a nut sleeve being threadedly connected to the screw rod, the nut sleeve being fixed to the lifting block (22) and restricted from rotating, and the motor being connected to the control output end of the visual control console (50).

3. The electric thread detector according to claim 2, characterized in that, The screw rod is rotatably located inside the column (21), a vertical sliding track (211) communicating with its inside being provided on the surface of the column (21), a sliding plate extending outward from the sliding track (211) being fixed to the nut sleeve, and the sliding plate being fixed to the lifting block (22).

4. The electric thread detector according to claim 2, characterized in that, A first sensor (1) for detecting the upper limit position of the lifting block (22) rising is fixed to the upper end of the column (21), a second sensor (2) for detecting the lower limit position of the lifting block (22) descending is fixed to the lower end of the column (21), and both the first sensor (1) and the second sensor (2) are connected to the signal input end of the visual control console (50).

5. The electric thread detector according to claim 1, characterized in that, A counter (3) is further included, and the counter (3) is connected to the controller of the electric screwdriver (40).

6. The electric thread detector according to claim 1, characterized in that A fixed sleeve is sleeved above the adjusting rod (24), and a sliding sleeve (27) is sleeved below it. The fixed sleeve can rotate, move and be locked downward along the adjusting rod (24), the sliding sleeve (27) can rotate and move along the adjusting rod (24), the sliding sleeve (27) is fixed to the slider (25), and a diagonal tension spring (26) is connected between the slider (25) and the fixed sleeve.

7. The electric thread detector according to claim 6, characterized in that, The fixed sleeve includes a rotating sleeve (281) and a quick shaft lock head (282) located below it.

8. The electric thread detector according to claim 7, wherein, A thrust bearing (283) is also provided between the rotating sleeve (281) and the optical axis quick lock head (282).

9. The electric thread detector according to claim 6, wherein The adjusting rod (24) is sleeved with a buffer spring (29), which is located between the sliding sleeve and the fixing sleeve, and both ends of the buffer spring (29) are freely arranged.

10. The electric thread detector according to claim 1, characterized in that, The outer ring of the rotary bearing has a first top screw (42) which can be screwed inwards to press against the inner ring to lock its rotation; the outer ring of the universal joint bearing has a second top screw (43) which can be screwed inwards to press against the inner ring to lock its rotation.

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