Hobbing cutter capable of automatically recording number of rotation turns

Abstract

The utility model provides a hob capable of automatically recording the number of rotation turns, and relates to the technical field of shield tunneling machines. The hobbing cutter comprises a counting component, a central shaft and a cutter body, wherein the cutter body is rotationally connected with the central shaft through two bearings. The counting component comprises a first push rod in sliding connection with the center shaft, and an elastic piece is arranged between the first push rod and the center shaft. The first push rod comprises a guiding part and a driving part, and the diameter of the driving part is gradually reduced in the direction away from the guiding part. A second push rod is arranged in the center shaft, one end of the second push rod abuts against the driving part, and the other end of the second push rod abuts against a push switch of the counter. The counter is arranged on the end face of the center shaft. A shifting plate is arranged between the two bearings and can synchronously rotate along with outer rings of the bearings. According to the hobbing cutter capable of automatically recording the number of rotation turns, the abrasion degree of the cutter is estimated according to the recorded number of rotation turns, operation is easy, and construction efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield machine technical field, concretely is a kind of rotary number of automatic recordable cutter. BACKGROUND

[0002] In shield construction, cutter is directly contacted with rock-soil as cutting component, so cutter is not only the core component of shield machine cutting rock-soil, but also the vulnerable part that is easy to wear, and it needs to be replaced frequently in actual construction. Whether cutter needs to be replaced needs to be judged by multiple dimensions, and the most important replacement index is the wear of cutter, and cutter needs to be replaced when the wear exceeds 20%-30% of the height of cutter ring.

[0003] At present, the way to obtain the wear of cutter is that first, the remaining height of cutter ring is measured by manual use of caliper or laser range finder, and then the wear of cutter is calculated according to the measured remaining height of cutter ring and the original height of cutter ring. This method has the problems of complicated operation and influence on construction progress. UTILITY MODEL CONTENT

[0004] In view of the above problems, the application provides a cutter capable of automatically recording rotary number, and the wear of cutter is estimated by the recorded rotary number, which is simple in operation and is beneficial to improve construction efficiency.

[0005] The technical scheme adopted by the utility model to solve its technical problems is:

[0006] A cutter capable of automatically recording rotary number, comprising a central shaft and a cutter body coaxially sleeved on the central shaft, the cutter body is rotationally connected with the central shaft through two bearings, further comprising a counting component, the counting component comprises a first push rod slidingly connected with the central shaft, the first push rod is located between the two bearings and is perpendicular to the axis of the central shaft;

[0007] An elastic member is arranged between the first push rod and the central shaft;

[0008] The first push rod comprises a guide portion and a driving portion in sequence in the direction away from the cutter body, and the diameter of the driving portion gradually decreases in the direction away from the guide portion;

[0009] A second push rod is arranged in the central shaft, one end of the second push rod abuts against the driving portion, and the other end of the second push rod abuts against the press switch of the counter;

[0010] The counter is arranged on the end face of the central shaft;

[0011] A dial plate is arranged between the two bearings, and the dial plate can synchronously rotate with the outer ring of the bearing;

[0012] With each rotation of the dial, the first push rod is pressed once, and the second push rod is pressed once by the driving part of the first push rod.

[0013] Further, a recess for accommodating the counter is arranged on the end face of the central shaft, and a second mounting hole for accommodating the second push rod is in communication with the recess, and the pressing switch of the counter extends into the second mounting hole.

[0014] Further, the first push rod further comprises a limiting part, and a limiting step surface is formed between the driving part and the limiting part, and the elastic member is a spring, and when the dial is not aligned with the first push rod, the second push rod is pressed against the limiting step surface of the first push rod.

[0015] Further, the end of the dial towards the cutter body is clamped and fixed between the outer rings of the two bearings.

[0016] Further, a limiting plate is arranged on the inner side of the cutter body between the two bearings, and a limiting gap is arranged on the limiting plate, and the shape of the limiting gap is consistent with the shape of the end of the dial towards the cutter body.

[0017] Further, the dial comprises a fixed part and a pressing part in sequence in the direction away from the cutter body, the pressing part is in a horn structure, and the large end is towards the side of the central shaft, the end of the pressing part away from the fixed part is in an arc structure, and the thickness of the fixed part is greater than the thickness of the pressing part.

[0018] Further, a first mounting hole for accommodating the first push rod is arranged on the central shaft, the first mounting hole comprises a first hole section and a second hole section in sequence in the direction close to the inside of the central shaft, the diameter of the first hole section is gradually increased, a guide block in a cylindrical structure is arranged in the first hole section, a guide hole is arranged on the guide block, the guide part of the first push rod is inserted into the guide hole of the guide block, and the other end of the first push rod opposite to the guide part is inserted into the second hole section.

[0019] Further, a protective sleeve is arranged on the end of the first push rod towards the cutter body, the opening end of the protective sleeve is provided with a pressing part extending to the outside in the radial direction, and the pressing part is pressed between the guide block and the step surface of the first mounting hole.

[0020] Further, the guide block is connected with the central shaft through a taper pipe thread.

[0021] Further, an insertion slot is arranged on the guide block.

[0022] The beneficial effects of the utility model are:

[0023] 1、The rotary number of the cutter can be automatically recorded, which can directly reflect the working intensity. By recording the number of rotations, the degree of tool wear can be estimated, and the number of rotations can be recorded as a criterion for tool replacement. Thus, in actual construction, the number of rotations can be directly read to determine whether the cutter needs to be replaced. This method is simple and convenient compared to the traditional method of measuring wear, and it is beneficial to improve the efficiency of construction.

[0024] 2、The recorded number of rotations as a criterion for tool replacement is more accurate and reliable, which can not only avoid overuse leading to breakage or failure, but also avoid premature replacement, reduce the cost of using (the cost of replacing the cutter is high), and reduce resource waste.

[0025] 3、The uniform wear of the cutter can ensure the smoothness of the excavation surface. By reading the number of rotations of each cutter and analyzing the difference in the number of rotations, the uniformity of the cutter head can be reflected.

[0026] 4、Recording the number of rotations of the cutter is conducive to lean management, reducing the cost of the project, and improving safety and construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A perspective view of a cutter capable of automatically recording the number of rotations provided by the embodiments of the present application;

[0028] Figure 2 is an enlarged structural schematic view of part A in Figure 1

[0029] Figure 3 A front view of a cutter capable of automatically recording the number of rotations provided by the embodiments of the present application;

[0030] Figure 4 A side view of a cutter capable of automatically recording the number of rotations provided by the embodiments of the present application;

[0031] Figure 5 is an A-A sectional view in Figure 3

[0032] Figure 6 is an enlarged structural schematic view of part B in Figure 5

[0033] Figure 7 is a B-B sectional view in Figure 4

[0034] Figure 8 ​​​​Fig. 4 is a schematic view of the structure when the dial plate is turned to the side of the counting component;

[0035] Figure 9 Fig. 5 is a schematic view of the mounting structure of the dial plate;

[0036] Figure 10 Fig. 6 is a schematic view of the three-dimensional structure of the guide block;

[0037] Figure 11 Fig. 7 is a sectional view of the guide block;

[0038] Figure 12 Fig. 8 is a schematic view of the three-dimensional structure of the counter;

[0039] Figure 13 Fig. 9 is a schematic view of the three-dimensional structure of the cutter body;

[0040] Figure 14 Fig. 10 is a schematic view of the three-dimensional structure of the protective sleeve.

[0041] In the figure: 11, first push rod; 111, guide portion; 112, driving portion; 113, limiting portion; 114, limiting step surface; 12, second push rod; 13, counter; 131, press switch; 14, dial plate; 141, fixed portion; 142, press portion; 15, spring; 16, guide block; 161, guide hole; 162, insertion slot; 17, protective sleeve; 171, compression portion;

[0042] 2, central shaft; 21, annular boss; 221, first hole section; 222, second hole section;

[0043] 3, cutter body; 31, limiting plate; 311, limiting notch;

[0044] 4, bearing; 41, inner ring; 42, outer ring;

[0045] 5, cutter ring;

[0046] 6, retaining ring;

[0047] 7, end cover;

[0048] 8, sealing member;

[0049] 9, locking nut. DETAILED DESCRIPTION

[0050] In order to make the person skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application, and the described embodiments are only some of the embodiments of the present application, but not all the embodiments. All other embodiments obtained by the person skilled in the art without creative labor on the basis of the embodiments of the present application shall belong to the protection scope of the present application.

[0051] For the convenience of understanding the specific embodiments of the present application, a coordinate system is defined as shown in Figure 1 The left-right direction is the horizontal direction, the front-rear direction is the vertical direction, and the up-down direction is the vertical direction.

[0052] Example One

[0053] As shown in Figure 1 , Figure 3 and Figure 5 , a hob capable of automatically recording the number of rotations includes a counting component, a central shaft 2, and a cutter body 3 coaxially sleeved on the central shaft 2, the cutter body 3 is rotationally connected to the central shaft 2 through two bearings 4. The cutter body 3 is provided with a cutter ring 5, one side of the cutter ring 5 abuts against the stepped surface of the cutter body 3, the other side of the cutter ring 5 is provided with a retaining ring 6 on the cutter body 3, the cutter ring 5 is limited between the stepped surface of the cutter body 3 and the retaining ring 6, and the cutter body 3 is provided with an annular limiting groove for accommodating the cutter ring 5. The cutter ring 5 is fixedly connected to the cutter body 3 in a detachable manner, as a specific embodiment, the cutter ring 5 is fixedly connected to the cutter body 3 in an interference fit manner. The central shaft 2 is provided with an end cap 7 on the outer side of each bearing 4 (the inner side is the side opposite to the two bearings 4), the end cap 7 is used to tighten the inner ring 41 of the bearing 4. A sealing element 8 is arranged between the outer ring 42 of the bearing 4 and the end cap 7, and the sealing element 8 is located inside the cutter body 3. The central shaft 2 is provided with a limiting structure on the outer side of each end cap 7 (the inner side is the side opposite to the two end caps 7), one of the limiting structures is an annular boss 21 arranged on the central shaft 2, according to the coordinate system shown in Figure 1 , the end cap 7 on the front side abuts against the rear side surface of the annular boss 21, and the other limiting structure is a locking nut 9, the locking nut 9 is fixedly connected to the central shaft 2 in a threaded connection manner.

[0054] As shown in Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the counting component comprises a first push rod 11 arranged in the central shaft 2, the first push rod 11 is located between the two bearings 4 and perpendicular to the axis of the central shaft 2. The first push rod 11 is in sliding connection with the central shaft 2, and an elastic member is arranged between the first push rod 11 and the central shaft 2. The first push rod 11 comprises a guide portion 111 and a driving portion 112 in sequence in the direction away from the cutter body 3, the guide portion 111 is in cylindrical structure, the driving portion 112 is in conical structure, and the diameter of the driving portion 112 gradually decreases in the direction away from the guide portion 111. A second push rod 12 perpendicular to the first push rod 11 is arranged in the central shaft 2, one end of the second push rod 12 abuts against the driving portion 112 of the first push rod 11, and the other end of the second push rod 12 abuts against a press switch 131 of a counter 13. The counter 13 is fixedly arranged on the end face of the central shaft 2 in a detachable manner, and the counter 13 is arranged on the front end face of the central shaft 2 in a detachable manner according to the coordinate system shown in the figure. Figure 1 The counter 13 is fixedly arranged on the front end face of the central shaft 2 in a detachable manner according to the coordinate system shown in the figure.

[0055] As a specific embodiment, as Figure 5 and Figure 12 As shown, the front end face of the central shaft 2 in the embodiment is provided with a groove for accommodating the counter 13, and the counter 13 is fixedly arranged in the groove by screws. A second mounting hole for accommodating the second push rod 12 communicates with the groove, and the press switch 131 of the counter 13 extends into the second mounting hole. Preferably, the diameter of the press switch 131 of the counter 13 is slightly smaller than the diameter of the second mounting hole, and the press switch 131 is arranged coaxially with the second mounting hole.

[0056] As Figure 7 As shown, when the dial plate 14 is aligned with the first push rod 11, the first push rod 11 moves away from the dial plate 14 under the extrusion of the dial plate 14, and the elastic member is compressed, and at the same time, the driving portion 112 of the first push rod 11 pushes the second push rod 12 to move away from the first push rod 11, thereby pressing the press switch 131 of the counter 13; as Figure 8When the dial plate 14 is rotated by a certain angle and is not aligned with the first push rod 11, the first push rod 11 moves to the side of the cutter body 3 under the elastic restoring force of the elastic member, and at the same time, the second push rod 12 moves to the side close to the first push rod 11 under the restoring force of the press switch 131 of the counter 13. At this time, the counter 13 completes one count. When the hob is working, the dial plate 14 rotates synchronously with the outer ring 42 of the bearing 4, and the dial plate 14 rotates one circle together with the outer ring 42 of the bearing 4, which will press the first push rod 11 once, and the counter 13 will count once. Thus, the number of rotations of the hob can be reflected on the counter 13 in real time.

[0057] As a specific embodiment, the central shaft 2 is provided with a first mounting hole for accommodating the first push rod 11. The first push rod 11 includes a guide portion 111, a driving portion 112 and a limiting portion 113 in sequence in the direction away from the cutter body 3, and a limiting step surface 114 is formed between the driving portion 112 and the limiting portion 113. The elastic member is a spring 15, one end of the spring 15 abuts against the blind end of the first mounting hole, and the other end of the spring 15 abuts against the end surface of the first push rod 11. When the dial plate 14 is rotated by a certain angle and is not aligned with the first push rod 11, the first push rod 11 moves to the side of the cutter body 3 under the elastic restoring force of the elastic member, and at the same time, the second push rod 12 moves to the side close to the first push rod 11 under the restoring force of the press switch 131 of the counter 13, until the second push rod 12 is pressed against the limiting step surface 114 of the first push rod 11.

[0058] As a specific embodiment, the end of the dial plate 14 towards the cutter body 3 is clamped and fixed between the outer rings 42 of the two bearings 4.

[0059] Further, as shown in the drawings, Figure 13 The inner side of the cutter body 3 is provided with a limiting plate 31 extending inwardly between the two bearings 4, the limiting plate 31 is inserted between the outer rings 42 of the two bearings 4, and the limiting plate 31 is provided with a limiting gap 311, the shape of the limiting gap 311 is consistent with the shape of the end of the dial plate 14 towards the cutter body 3.

[0060] As a specific embodiment, the limiting plate 31 is in a ring structure and is coaxially arranged with the cutter body 3, and the outer edge of the limiting plate 31 is fixedly connected with the cutter body 3 by welding.

[0061] As a specific embodiment, as shown in the drawings, Figure 8 and Figure 9As shown, the push plate 14 in the embodiment comprises a fixing portion 141 and a pressing portion 142 in sequence in the direction away from the cutter body 3. The fixing portion 141 is in a circular structure, and the limiting notch 311 is in an arc structure matching the fixing portion 141, and the central angle of the limiting notch 311 is greater than 180°.

[0062] Further, as shown in Figure 5 , the thickness of the fixing portion 141 is greater than that of the pressing portion 142, and the symmetry plane of the fixing portion 141 coincides with that of the pressing portion 142.

[0063] Further, the end of the first push rod 11 towards the cutter body 3 is in a hemispherical structure, and the end of the second push rod 12 towards the first push rod 11 is in a hemispherical structure.

[0064] Further, the axis of the first push rod 11 intersects with the axis of the central shaft 2.

[0065] Further, as shown in Figure 6 , the first mounting hole comprises a first hole section 221 and a second hole section 222 in sequence in the direction close to the inside of the central shaft 2. The diameter of the first hole section 221 is greater than that of the second hole section 222, and a stepped surface is formed between the first hole section 221 and the second hole section 222. A guide block 16 in a cylindrical structure is arranged in the first hole section 221, and the guide block 16 is fixedly arranged in the first hole section 221 of the first mounting hole by threaded connection. A guide hole 161 penetrating the guide block 16 in the axial direction is arranged on the guide block 16. The guide portion 111 of the first push rod 11 is inserted into the guide hole 161 of the guide block 16 and forms a guide fit with the guide hole 161. The other end of the first push rod 11 opposite to the guide portion 111 is inserted into the second hole section 222 of the first mounting hole, and the spring 15 is located in the second hole section 222.

[0066] By arranging the guide block 16, the machining difficulty can be reduced, and when the guide block 16 is worn, the guide block 16 can be conveniently replaced.

[0067] Further, as shown in Figure 10 and Figure 11 , an insertion slot 162 cooperating with a tool wrench is arranged on the end face of the guide block 16 towards the cutter body 3. As a specific embodiment, the insertion slot 162 in the embodiment is in a hexagonal structure for cooperating with a hexagonal wrench.

[0068] Further, as shown in Figure 6 and Figure 14 the end of the first push rod 11 towards the tool body 3 is sleeved with a protective sleeve 17, and the open end of the protective sleeve 17 is provided with a pressing portion 171 extending radially outward. When the guide block 16 is tightened, the pressing portion 171 is pressed between the guide block 16 and the stepped surface of the first mounting hole. The protective sleeve 17 is made of elastic material. As a specific embodiment, the protective sleeve 17 in the embodiment is made of rubber material. In this way, when the first push rod 11 is stretched or retracted, the protective sleeve 17 can always be attached to the first push rod 11.

[0069] By setting the protective sleeve 17 and connecting the guide block 16 to the central shaft 2 through the sealing tapered pipe thread, the lubricating oil in the chamber can be isolated, preventing the lubricating oil in the chamber from entering the second hole section 222 of the first mounting hole and then seeping out from the end of the central shaft 2 through the second mounting hole.

[0070] Embodiment Two

[0071] The first push rod 11 only includes a guide portion 111 and a driving portion 112, one end of the spring 15 is fixedly connected to the blind end of the first mounting hole, and the other end of the spring 15 is fixedly connected to the end face of the first push rod 11. The remaining structure is the same as that of Embodiment One.

[0072] Embodiment Three

[0073] The end of the push plate 14 towards the tool body 3 is fixedly connected to the outer ring 42 of one of the bearings 4 through a screw, and the hole on the push plate 14 matched with the screw is a countersunk hole. The remaining structure is the same as that of Embodiment One.

[0074] The other embodiments obtained by the skilled in the art through means such as combining, splitting, and recombining the embodiments of the present application without exceeding the protection scope of the present application are also included in the protection scope of the present application.

[0075] The above specific embodiments have been described in detail for the purpose of illustrating the objectives, technical solutions, and beneficial effects of the embodiments of the present application. The above is only a specific embodiment of the present application, and is not used to limit the protection scope of the embodiments of the present application, i.e., any modification, equivalent replacement, improvement, etc. made on the basis of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A hob capable of automatically recording the number of rotations, comprising a central shaft (2) and a cutter body (3) coaxially mounted on the central shaft (2), wherein the cutter body (3) is rotatably connected to the central shaft (2) via two bearings (4), characterized in that: It also comprises a counting component, which comprises a first push rod (11) in sliding connection with the central shaft (2), the first push rod (11) being located between the two bearings (4) and being perpendicular to the axis of the central shaft (2); An elastic member is arranged between the first push rod (11) and the central shaft (2); The first push rod (11) comprises a guide portion (111) and a driving portion (112) in sequence in the direction away from the cutter body (3), the diameter of the driving portion (112) gradually decreases in the direction away from the guide portion (111); A second push rod (12) is arranged in the central shaft (2), one end of the second push rod (12) abuts against the driving portion (112), and the other end of the second push rod (12) abuts against a press switch (131) of a counter (13); The counter (13) is arranged on the end face of the central shaft (2); A dial plate (14) is arranged between the two bearings (4), and the dial plate (14) can rotate synchronously with the outer ring (42) of the bearing (4); The dial plate (14) is pressed once per rotation, the second push rod (12) is pressed once per rotation under the driving of the driving portion (112) of the first push rod (11).

2. The automatically recordable rotary hours hob according to claim 1, characterized in that: A groove is arranged on the end face of the central shaft (2) for accommodating the counter (13), a second mounting hole for accommodating the second push rod (12) is in communication with the groove, and the press switch (131) of the counter (13) extends into the second mounting hole.

3. The automatically recordable rotary hours hob according to claim 1, characterized in that: The first push rod (11) further comprises a limiting portion (113), a limiting step surface (114) is formed between the driving portion (112) and the limiting portion (113), the elastic member is a spring (15), and when the dial plate (14) is not aligned with the first push rod (11), the second push rod (12) is pressed against the limiting step surface (114) of the first push rod (11).

4. The automatically recordable rotary hours hob according to claim 1, characterized in that: The end of the dial plate (14) facing the cutter body (3) is clamped and fixed between the outer rings (42) of the two bearings (4).

5. The automatically recordable rotary hour meter of claim 4 wherein: A limiting plate (31) is arranged on the inner side of the cutter body (3) between the two bearings (4), a limiting notch (311) is arranged on the limiting plate (31), and the shape of the limiting notch (311) is consistent with the shape of the end of the dial plate (14) facing the cutter body (3).

6. The automatically recordable rotary hour meter of claim 1 wherein: The dial plate (14) comprises a fixing portion (141) and a pressing portion (142) in sequence in the direction away from the cutter body (3), the pressing portion (142) is in a horn structure, the large end faces the central shaft (2), the end of the pressing portion (142) away from the fixing portion (141) is in an arc structure, and the thickness of the fixing portion (141) is greater than the thickness of the pressing portion (142).

7. The automatically recordable rotary hours hob according to claim 1, characterized in that: The central shaft (2) is provided with a first mounting hole for accommodating the first push rod (11), the first mounting hole sequentially comprises a first hole section (221) and a second hole section (222) with increasing diameters in the direction close to the inside of the central shaft (2), a guide block (16) with a cylindrical structure is arranged in the first hole section (221), the guide block (16) is provided with a guide hole (161), the guide part (111) of the first push rod (11) is inserted into the guide hole (161) of the guide block (16), and the other end of the first push rod (11) opposite to the guide part (111) is inserted into the second hole section (222).

8. The automatically recordable rotary hours hob according to claim 7, characterized in that: The end of the first push rod (11) towards the cutter body (3) is sleeved with a protective sleeve (17), the opening end of the protective sleeve (17) is provided with a pressing part (171) extending to the outside in the radial direction, and the pressing part (171) is pressed between the guide block (16) and the step surface of the first mounting hole.

9. The automatically recordable rotary hour meter of claim 8 wherein: The guide block (16) is connected with the central shaft (2) through a taper pipe thread.

10. The automatically recordable rotary hour meter of claim 9 wherein: The guide block (16) is provided with an insertion slot (162).

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