Water pump pneumatic measuring device and floating connector of pneumatic measuring instrument

Abstract

The present invention relates to a pneumatic measuring device for a water pump and a floating connector of a pneumatic measuring instrument. For the floating connector of the pneumatic measuring instrument, a bearing cavity is provided inside the connector body. The bearing cavity has a top plug and a bottom plug. A measuring head mounting sleeve is arranged inside the bearing cavity. The top plug and / or the bottom plug is a detachable structure for the measuring head mounting sleeve to be inserted; an annular flange is arranged on the outer peripheral surface of the measuring head mounting sleeve. An upper thrust bearing is arranged between the top surface of the annular flange and the top plug, and a lower thrust bearing is arranged between the bottom surface of the annular flange and the bottom plug; the annular flange is radially movably arranged between the upper thrust bearing and the lower thrust bearing. The measuring head can move radially relative to the sliding device, avoiding the problems that when the positioning accuracy of the workpiece to be measured is not high, the measuring head collides with the workpiece to be measured and affects the measuring accuracy, thereby reducing the requirement for the positioning accuracy of the workpiece to be measured.

Description

Technical Field

[0001] The invention relates to a water pump pneumatic measuring device and a floating connector of a pneumatic measuring instrument thereof. Background Art

[0002] Pneumatic measuring instruments are commonly used in the precision machining industry. They can measure the inner diameter, outer diameter, slot width, distance between two holes and other parameters of the workpiece. Pneumatic measuring instruments use compressed air as the medium to measure the length of the workpiece based on the principles of fluid statics and fluid dynamics.

[0003] A Chinese utility model patent with authorization announcement number CN204831228U and authorization announcement date December 2, 2015 discloses an automatic shaft chamber detection device and its production equipment. The shaft chamber automatic detection production equipment uses a robot to realize the loading and unloading of the workpiece to be tested, and uses a pneumatic measuring instrument to realize automatic detection of the shaft chamber of the workpiece to be tested, so as to distinguish qualified products from unqualified products and place them by classification through the robot.

[0004] However, the existing pneumatic measuring instruments have high requirements for the positioning accuracy of the workpiece to be measured when working, so as to avoid the measuring head colliding with the workpiece to be measured when inserting into the measuring hole of the workpiece to be measured, thereby causing damage to the workpiece to be measured or the measuring head of the pneumatic measuring instrument. When the positioning accuracy of the workpiece to be measured is not high, it will also affect the measurement accuracy of the pneumatic measuring instrument. Summary of the invention

[0005] The object of the present invention is to provide a water pump pneumatic measuring device to solve the problem that the pneumatic measuring instruments in the prior art have high requirements for the positioning accuracy of the workpiece to be measured when they are working. Another object of the present invention is to provide a floating connector of a pneumatic measuring instrument to solve the problem that the pneumatic measuring instruments in the prior art have high requirements for the positioning accuracy of the workpiece to be measured when they are working.

[0006] To achieve the above object, the technical solution of the floating connector of the pneumatic measuring instrument in the present invention is: the floating connector of the pneumatic measuring instrument includes a connector body, and the connector body is used to connect with the lifting device to realize the lifting of the floating connector;

[0007] The connector body has a bearing cavity, and the bearing cavity has a top blocking body and a bottom blocking body. The top blocking body is provided with an air pipe through hole, and the air pipe through hole is used for the air pipe of the pneumatic measuring instrument to pass into the bearing cavity; the bottom blocking body is provided with a measuring head through hole, and the measuring head through hole is used for the measuring head connecting handle of the pneumatic measuring instrument to pass through;

[0008] A measuring head mounting sleeve is provided in the bearing cavity, and the top blocking body and / or the bottom blocking body are detachable structures for the measuring head mounting sleeve to be installed;

[0009] The measuring head mounting sleeve is provided with an axial jack, into which the connecting shank of the measuring head of the pneumatic measuring instrument is inserted; the measuring head mounting sleeve is also provided with an axial limiting structure for axially limiting the connecting shank of the measuring head.

[0010] An annular flange is provided on the outer peripheral surface of the measuring head mounting sleeve. An upper thrust bearing is provided between the top surface of the annular flange and the top plugging body, and a lower thrust bearing is provided between the bottom surface of the annular flange and the bottom plugging body; both the upper and lower are axial contact thrust bearings. The annular flange is clamped and fixed between the upper thrust bearing and the lower thrust bearing, and the upper thrust bearing and the lower thrust bearing are used to provide a radial movement space for the measuring head mounting sleeve by using their own clearances.

[0011] The beneficial effects of the floating connector of the pneumatic measuring instrument in the present invention are as follows: The floating connector is respectively connected to the lifting device and the measuring head of the pneumatic measuring instrument. The measuring head is driven by the lifting device to insert into the workpiece to be detected for measurement and to be pulled out from the workpiece after the detection is completed. The measuring head mounting sleeve connects and limits the measuring head to prevent the axial sliding of the connecting shank of the measuring head from affecting the measurement result. The measuring head mounting sleeve is fixedly connected to the measuring head, and the connector body is fixedly connected to the lifting device. The measuring head mounting sleeve is radially movably arranged on the connector body, so that the measuring head can move radially relative to the sliding device, avoiding the problems of collision between the measuring head and the workpiece to be measured and affecting the measurement accuracy when the positioning accuracy of the workpiece to be measured is not high, thereby reducing the requirement for the positioning accuracy of the workpiece to be measured.

[0012] Further, a set screw is provided on the outer peripheral surface of the measuring head mounting sleeve, and the axial limiting structure is formed by the set screw.

[0013] Its beneficial effect is that the structure is simple and the operation is convenient.

[0014] Further, the set screw is arranged on the outer peripheral surface of the annular flange, and a screw operation hole is provided on the side wall of the bearing cavity. The screw operation hole allows a screwing tool to penetrate into the bearing cavity to loosen or tighten the set screw.

[0015] Its beneficial effect is that it is convenient to screw and tighten the set screw.

[0016] Further, the connector body includes an upper cover body, an intermediate sleeve body and a lower cover body. The top plugging member is formed by the upper cover body, and the bottom plugging member is formed by the lower cover body. The upper cover body, the intermediate sleeve body and the lower cover body are mutually fixed by screws passing through the three.

[0017] Its beneficial effect is that the structure is simple and the operation is convenient.

[0018] Further, the axial contact thrust bearing is a thrust ball bearing.

[0019] The technical solution of the pneumatic measuring device for a water pump in the present invention is as follows: The pneumatic measuring device for a water pump includes a lifting device and a pneumatic measuring instrument. The lifting device is used to drive the measuring head of the pneumatic measuring instrument to move up and down.

[0020] It further includes a floating connector. The floating connector includes a connector body, and the connector body is used to be connected to the lifting device to realize the lifting of the floating connector.

[0021] There is a bearing cavity in the connector body. The bearing cavity has a top plug and a bottom plug. An air pipe through hole is provided on the top plug, and the air pipe of the pneumatic measuring instrument penetrates into the bearing cavity through the air pipe through hole. A measuring head through hole is provided on the bottom plug, and the connecting handle of the measuring head of the pneumatic measuring instrument passes through the measuring head through hole.

[0022] A measuring head mounting sleeve is provided in the bearing cavity. The top plug and / or the bottom plug are detachable structures for the measuring head mounting sleeve to be inserted.

[0023] An axial insertion hole is provided on the measuring head mounting sleeve, and the connecting handle of the measuring head of the pneumatic measuring instrument is inserted into the axial insertion hole. An axial limiting structure for axially limiting the connecting handle of the measuring head is also provided on the measuring head mounting sleeve.

[0024] An annular flange is provided on the outer peripheral surface of the measuring head mounting sleeve. An upper thrust bearing is provided between the top surface of the annular flange and the top plug, and a lower thrust bearing is provided between the bottom surface of the annular flange and the bottom plug. Both the upper and lower are axial contact thrust bearings. The annular flange is clamped and fixed between the upper thrust bearing and the lower thrust bearing. The upper thrust bearing and the lower thrust bearing are used to provide a radial movement space for the measuring head mounting sleeve by using their own clearances.

[0025] The beneficial effect of the pneumatic measuring device for a water pump in the present invention is as follows: The floating connector is respectively connected to the lifting device and the measuring head of the pneumatic measuring instrument. The measuring head is driven by the lifting device to insert into the workpiece to be detected for measurement and to be pulled out from the workpiece after the detection is completed. The measuring head mounting sleeve connects and limits the measuring head to prevent the axial sliding of the connecting handle of the measuring head from affecting the measurement result. The measuring head mounting sleeve is fixedly connected to the measuring head, and the connector body is fixedly connected to the lifting device. The measuring head mounting sleeve is radially movably arranged on the connector body, so that the measuring head can move radially relative to the sliding device, avoiding the problem that when the positioning accuracy of the workpiece to be measured is not high, the measuring head collides with the workpiece to be measured and affects the measurement accuracy, thereby reducing the requirement for the positioning accuracy of the workpiece to be measured.

[0026] Further, a set screw is provided on the outer peripheral surface of the measuring head mounting sleeve, and the axial limiting structure is formed by the set screw.

[0027] The beneficial aspect thereof is that the structure is simple and the operation is convenient.

[0028] Further, the set screw is arranged on the outer peripheral surface of the annular flange, and a screw operation hole is provided on the side wall of the bearing cavity. The screw operation hole allows a screwing tool to extend into the bearing cavity to loosen or tighten the set screw.

[0029] The advantage is that it is convenient to screw and tighten the set screw.

[0030] Further, the connector body includes an upper cover body, an intermediate sleeve body and a lower cover body. The top plugging member is formed by the upper cover body, and the bottom plugging member is formed by the lower cover body. The upper cover body, the intermediate sleeve body and the lower cover body are fixed to each other by screws passing through the three.

[0031] The advantage is that the structure is simple and the operation is convenient.

[0032] Further, a card slot for the set screw to enter is provided on the measuring head connecting handle, and the distance between the upper slot wall and the lower slot wall of the card slot is greater than the diameter of the set screw.

[0033] The advantage is that the anti-rotation of the measuring head and the measuring head mounting sleeve is realized through the cooperation of the card slot and the set screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic structural diagram of a specific embodiment of the pneumatic measuring device for a water pump according to the present invention;

[0035] Figure 2 is Figure 1 an exploded view of a part of

[0036] Figure 3 is Figure 1 a top view of a part of

[0037] Figure 4 is Figure 3 a cross-sectional view taken along A-A of

[0038] Figure 5 is Figure 1 a schematic structural diagram of a part of

[0039] In the figure: 1, linear bearing, 101, outer sleeve, 102, inner sleeve, 2, workbench, 3, linear electric cylinder, 4, connector body, 41, upper cover body, 42, intermediate sleeve body, 43, lower cover body, 5, fixing screw, 6, measuring head mounting sleeve, 61, annular flange, 7, upper thrust bearing, 8, set screw, 9, lower thrust bearing, 10, connecting shaft, 11, measuring head, 12, measuring head through hole, 13, L-shaped sliding plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The following further describes the embodiments of the present invention with reference to the drawings.

[0041] A specific embodiment of the pneumatic measuring device for water pump housing detection in the present invention is as follows Figure 1 and Figure 2 shown, which includes a linear electric cylinder 3, a floating connector, a pneumatic measuring instrument, a workbench 2 and a loading and unloading manipulator. The linear electric cylinder 3 is fixed on the workbench 2 to drive the L-shaped sliding plate to move up and down, and the linear electric cylinder 3 constitutes a lifting device. The pneumatic measuring instrument is fixed on the L-shaped sliding plate and includes a measuring instrument main body and a measuring head 11. The measuring head 11 includes a connecting handle and an air hole section distributed along the axial direction. The air hole section is used to extend into the water pump housing. The measuring instrument main body and the connecting handle of the measuring head are connected through an air pipe. The loading and unloading manipulator is used to move the water pump housing to be detected to the detection station on the workbench 2, and classify and move the detected water pump housing to the qualified product storage area or the unqualified product storage area. The measuring head 11 is connected to the linear electric cylinder 3 through a floating connector to extend into the water pump housing to be detected for measurement, and is withdrawn from the water pump housing after the detection is completed to wait for the next water pump housing to be detected. The linear electric cylinder 3, the pneumatic measuring instrument, the workbench 2 and the loading and unloading manipulator are all common structures in the prior art and will not be described in detail here

[0042] As Figure 3 and Figure 4 shown, the floating connector includes a connector main body 4. The connector main body 4 is connected to the linear electric cylinder 3 to realize the lifting of the floating connector. The specific connection method is that a linear bearing 1 is fixed on the linear electric cylinder 3, a connecting shaft 10 is sleeved in the linear bearing, the upper cover body 41 is fixedly connected to the connecting shaft 10, a locking screw is threadedly connected to the connecting shaft 10, and a long hole for the locking screw to pass through is provided on the outer sleeve 101 of the linear bearing 1. The long hole extends in the vertical direction to enable the connecting shaft 10 to move relative to the linear bearing 1 along the axial direction. The length of the inner sleeve 102 of the linear bearing 1 is less than that of the inner sleeve 101, and the inner sleeve 102 is not provided with an avoidance structure for the locking screw. The connector main body 4 includes an upper cover body 41, an intermediate sleeve body 42 and a lower cover body 43. The upper cover body 41, the intermediate sleeve body 42 and the lower cover body 43 are fixed together by fixing screws 5 passing through the three. The specific form is that a counterbore is provided on the lower cover body 43, a through hole is provided on the intermediate sleeve body 42, and a threaded hole is provided on the upper cover body 41. The fixing screw 5 passes through the counterbore and the through hole and is threadedly connected to the threaded hole. The upper cover body 41, the intermediate sleeve body 42 and the lower cover body 43 are fixed to enclose a bearing cavity. The upper cover body 41 constitutes the top plug of the bearing cavity, and an air pipe through hole is provided on the top plug for the air pipe of the pneumatic measuring instrument to penetrate into the bearing cavity. The lower cover body 43 constitutes the bottom plug of the bearing cavity, and a measuring head through hole 12 is provided on the bottom plug for the connecting handle of the measuring head of the pneumatic measuring instrument to pass through

[0043] As Figure 5As shown in the figure, a measuring head mounting sleeve 6, an upper thrust bearing 7 and a lower thrust bearing 9 are provided in the bearing cavity. The measuring head mounting sleeve 6 is of a rotary body structure, and an axial insertion hole is provided thereon. The lower part of the axial insertion hole is for the connection shank of the measuring head of the pneumatic measuring instrument to be inserted. The air pipe is inserted from the upper part of the axial insertion hole and communicated with the measuring head 11 of the pneumatic measuring instrument. An annular flange 61 is provided on the outer peripheral surface of the measuring head mounting sleeve 6. The upper thrust bearing 7 is arranged between the top surface of the annular flange 61 and the top sealing body, and the lower thrust bearing 9 is arranged between the bottom surface of the annular flange 61 and the bottom sealing body. The measuring head mounting sleeve 6 is axially positioned by the upper thrust bearing 7 and the lower thrust bearing 9. Both the upper thrust bearing 7 and the lower thrust bearing 9 are thrust ball bearings. A part of the lower end of the measuring head mounting sleeve 6 extends into the measuring head through hole 12 and has a radial floating interval with the measuring head through hole 12. There is an axial interval between the annular flange 61 and the intermediate sleeve body 42. The annular flange 61 is clamped and fixed between the upper thrust bearing 7 and the lower thrust bearing 9. The upper thrust bearing 7 and the lower thrust bearing 9 are used to provide a radial movement space for the measuring head mounting sleeve by using their own clearances so that the measuring head mounting sleeve 6 can move radially relative to the connector body 4. The floating amount of the measuring head mounting sleeve 6 relative to the connector body 4 in the radial direction is 0.5 mm on one side.

[0044] A set screw 8 is provided on the outer peripheral surface of the annular flange 61. An operation hole is provided on the side wall of the bearing cavity for a screwing tool to extend into the bearing cavity to loosen or tighten the set screw 8. A slot for the set screw 8 to enter is provided radially on the outer peripheral surface of the connection shank of the measuring head 11. The distance between the upper slot wall and the lower slot wall of the slot is greater than the diameter of the set screw 8. The set screw 8 is used to be inserted into the slot to axially position the measuring head 11. The set screw 8 constitutes an axial limiting structure.

[0045] In this embodiment, the upper cover body 41, the intermediate sleeve body 42 and the lower cover body 43 are all separately arranged and connected by fixing bolts 5. In other embodiments, other forms can be adopted. For example, the upper cover body and the intermediate sleeve body are integrally arranged and connected to the lower cover body by bolts, or the lower cover body and the intermediate sleeve body are integrally arranged and integrally connected to the upper cover body.

[0046] In this embodiment, the upper cover body 41, the intermediate sleeve body 42 and the lower cover body 43 are fixed to each other by screws passing through the three. In other embodiments, the upper cover body, the intermediate sleeve body and the lower cover body can also be fixed together in other forms. For example, the upper cover body and the intermediate sleeve body are connected by a set of bolts, and the lower cover body and the intermediate sleeve body are connected by another set of bolts.

[0047] In this embodiment, the set screw 8 is provided on the outer peripheral surface of the annular flange 61. In other embodiments, the set screw can also be provided at other parts of the measuring head mounting sleeve. For example, on the part where the measuring head mounting sleeve extends into the measuring head through hole, or at a position corresponding to the upper thrust bearing or the lower thrust bearing.

[0048] In other embodiments, the axial position limiting structure may also be in a form other than the set screw. For example, a pin inserted radially into the measuring head connecting handle of the measuring head mounting sleeve, or connected by screw threads.

[0049] In other embodiments, a clamping groove may not be provided on the measuring head connecting handle, and the measuring head is axially limited by the abutment of the set screw.

[0050] Both the upper thrust bearing and the lower thrust bearing in this embodiment are thrust ball bearings. In other embodiments, the upper thrust bearing and the lower thrust bearing may also adopt other forms of axial contact thrust bearings, such as thrust cylindrical roller bearings and thrust needle roller bearings.

[0051] The specific embodiment of the floating connector of the pneumatic measuring instrument of the present invention has the same structure as the floating connector in the specific embodiment of the above-mentioned water pump measuring device, and will not be described in detail.

Claims

1. Floating connector of pneumatic measuring instrument, characterized in that: It includes a connector body which is used to connect with a lifting device to achieve the lifting of the floating connector. There is a bearing cavity inside the connector body. The bearing cavity has a top sealing body and a bottom sealing body. An air pipe through-hole is provided on the top sealing body for the air pipe of the pneumatic measuring instrument to penetrate into the bearing cavity; a measuring head through-hole is provided on the bottom sealing body for the connecting handle of the measuring head of the pneumatic measuring instrument to pass through. A measuring head mounting sleeve is provided in the bearing cavity, and the top sealing body and / or the bottom sealing body is a detachable structure for the measuring head mounting sleeve to be installed. An axial jack is provided on the measuring head mounting sleeve for the connecting handle of the measuring head of the pneumatic measuring instrument to be inserted; an axial limiting structure for axially limiting the connecting handle of the measuring head is also provided on the measuring head mounting sleeve. A ring flange is provided on the outer peripheral surface of the measuring head mounting sleeve. An upper thrust bearing is provided between the top surface of the ring flange and the top sealing body, and a lower thrust bearing is provided between the bottom surface of the ring flange and the bottom sealing body; both the upper and lower are axial contact thrust bearings. The ring flange is clamped and fixed between the upper thrust bearing and the lower thrust bearing and is axially limited. The upper thrust bearing and the lower thrust bearing are used to provide a radial movement space for the measuring head mounting sleeve by using their own clearances.

2. The floating connector of the pneumatic measuring instrument according to claim 1, characterized in that: A set screw is provided on the outer peripheral surface of the measuring head mounting sleeve, and the axial limiting structure is formed by the set screw.

3. The floating connector of the pneumatic measuring instrument according to claim 2, characterized in that: The set screw is arranged on the outer peripheral surface of the ring flange, and a screw operation hole is provided on the side wall of the bearing cavity for a screwing tool to penetrate into the bearing cavity to loosen or tighten the set screw.

4. The floating connector of the pneumatic measuring instrument according to any one of claims 1-3, characterized in that: The connector body includes an upper cover body, an intermediate sleeve body and a lower cover body. The top sealing member is formed by the upper cover body, and the bottom sealing member is formed by the lower cover body. The upper cover body, the intermediate sleeve body and the lower cover body are fixed to each other by screws passing through the three.

5. The floating connector of the pneumatic measuring instrument according to any one of claims 1-3, characterized in that: The axial contact thrust bearing is a thrust ball bearing.

6. Water pump pneumatic measuring device, including a lifting device and a pneumatic measuring instrument, the lifting device is used to drive the measuring head of the pneumatic measuring instrument to lift; Characterized in that: It also includes a floating connector. The floating connector includes a connector body which is connected with a lifting device to achieve the lifting of the floating connector. There is a bearing cavity inside the connector body. The bearing cavity has a top sealing body and a bottom sealing body. An air pipe through-hole is provided on the top sealing body for the air pipe of the pneumatic measuring instrument to penetrate into the bearing cavity; a measuring head through-hole is provided on the bottom sealing body for the connecting handle of the measuring head of the pneumatic measuring instrument to pass through. A measuring head mounting sleeve is provided in the bearing cavity, and the top sealing body and / or the bottom sealing body is a detachable structure for the measuring head mounting sleeve to be installed. The measuring head mounting sleeve is of a rotary body structure, and an axial jack is provided thereon for the connecting handle of the measuring head of the pneumatic measuring instrument to be inserted; an axial limiting structure for axially limiting the connecting handle of the measuring head is also provided on the measuring head mounting sleeve. A ring flange is provided on the outer peripheral surface of the measuring head mounting sleeve. An upper thrust bearing is provided between the top surface of the ring flange and the top sealing body, and a lower thrust bearing is provided between the bottom surface of the ring flange and the bottom sealing body. The ring flange is clamped and fixed between the upper thrust bearing and the lower thrust bearing and is axially limited; the ring flange is radially movably arranged between the upper thrust bearing and the lower thrust bearing.

7. The water pump pneumatic measuring device according to claim 6, characterized in that: A set screw is provided on the outer peripheral surface of the measuring head mounting sleeve, and the axial limiting structure is formed by the set screw.

8. The water pump pneumatic measuring device according to claim 7, characterized in that: The set screw is arranged on the outer peripheral surface of the annular flange, and an operation hole is provided on the side wall of the bearing cavity for a screwing tool to penetrate into the bearing cavity to loosen or tighten the set screw.

9. The water pump pneumatic measuring device according to any one of claims 6-8, characterized in that: The connector body includes an upper cover body, an intermediate sleeve body and a lower cover body, and the upper cover body, the intermediate sleeve body and the lower cover body are fixed to each other by screws passing through the three.

10. The water pump pneumatic measuring device according to claim 7 or 8, characterized in that: A card slot for the set screw to enter is provided on the measuring head connecting handle, and the distance between the upper slot wall and the lower slot wall of the card slot is greater than the diameter of the set screw.

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