Cutting head locking anti-loose structure and heading machine

Abstract

The utility model relates to the technical field of locking, in particular to a cutting head locking and locking structure and a heading machine. According to the cutting head locking anti-loose structure, a first mounting hole is formed in a cutting head shaft; the cutting head is mounted on the cutting head shaft and is provided with a second mounting hole; the rod part of the fastener is provided with a first step section and a second step section which are arranged in the axial direction, and a first limiting part is formed on the first step section; a second limiting part is formed on the head part of the fastener; the distance L1 between the first limiting part and the second limiting part is larger than the thickness L2 of the part, allowing the rod part to penetrate through, of the second mounting hole. The lock washer is arranged in the first mounting hole and abuts against the first limiting part. According to the locking device, the fastening piece can be locked and fixed relative to the cutting head shaft, when the cutting head shaft rotates relative to the cutting head, the cutting head cannot drive the fastening piece to loosen, the anti-loosening purpose is achieved, the situation that the cutting head falls off from the cutting head shaft is avoided, the use performance of the heading machine is improved, and the service life of the heading machine is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lock technology field especially a kind of cutting head locking anti-loosening structure and heading machine. BACKGROUND

[0002] Heading machine is a kind of combined unit that can realize cutting, loading and transporting, self walking and spraying dust removal. Because heading machine cutting head and cutting head shaft adopt spline connection to realize circumferential cooperation and adopt screw to realize axial positioning, cutting head is subjected to huge impact load when rotating cutting operation, spline pair will continuously increase spline cooperation gap under the action of impact load, so that cutting head and cutting head shaft produce reciprocating small amplitude rotation, thereby leading to continuous displacement between screw and cutting head, causing screw loosening, and further leading to cutting head falling off. SUMMARY

[0003] Therefore, the purpose of the present application is to provide a kind of cutting head locking anti-loosening structure and heading machine, to solve the problem that the screw for the axial positioning of cutting head shaft is prone to loosening, leading to cutting head prone to fall off from cutting head shaft, affecting the use performance and service life of heading machine.

[0004] The utility model provides a kind of cutting head locking anti-loosening structure in the first aspect of the utility model, wherein the cutting head locking anti-loosening structure includes:

[0005] Cutting head shaft, first mounting hole is set in one end in the axial direction;

[0006] Cutting head, installation is carried out in the one end of cutting head shaft, which is provided with the first mounting hole, second mounting hole is set in the cutting head and communicated with the first mounting hole;

[0007] Fastener, it is set in the first mounting hole and the second mounting hole;The fastener includes stem portion and head portion;The stem portion has the first stepped section and the second stepped section arranged along the axial direction, the radial dimension of the first stepped section is greater than the radial dimension of the second stepped section, and the first limiting portion is formed on the circumferential side wall of the second stepped section and protrudes radially from the second stepped section at the one end of the first stepped section facing the second stepped section;The head portion is connected with the one end of the first stepped section away from the second stepped section, and the second limiting portion is formed on the circumferential side wall of the first stepped section and protrudes radially from the first stepped section at the one end of the head portion facing the stem portion;In the axial direction, the distance between the first limiting portion and the second limiting portion is L1, the thickness of the part of the stem portion passing through the second mounting hole is L2, L1> L2;

[0008] Lock washer, it is set in the first mounting hole, and abuts with the first limiting portion.

[0009] Preferably, the first mounting hole is formed as a stepped hole with a first boss, and an end of the lock washer away from the first limiting portion abuts against the first boss.

[0010] Preferably, the second mounting hole is formed as a stepped hole with a second boss, and the second limiting portion abuts against the second boss.

[0011] Preferably, at least part of the head portion is arranged outside the second mounting hole.

[0012] Preferably, the lock washer is formed as an annular structure sleeved on the second stepped section, and a radial dimension of an inner annular wall of the lock washer is smaller than a radial dimension of the first stepped section.

[0013] Preferably, a radial dimension of an outer annular wall of the lock washer is greater than the radial dimension of the first stepped section.

[0014] Preferably, a gap is formed between a circumferential side wall of the fastener and the second mounting hole.

[0015] Preferably, the circumferential side wall of the second stepped section is provided with a thread.

[0016] Preferably, a plurality of fasteners are arranged, and the plurality of fasteners are arranged at intervals around an axis of the cutting head shaft.

[0017] The second aspect of the utility model provides a tunneling machine, including any technical scheme described above cutting head locking anti-loose structure.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The cutting head locking and anti-loosening structure of the utility model has the advantages that the cutting head shaft is provided with the first installation hole at one end in the axial direction, the cutting head is installed at one end of the cutting head shaft provided with the first installation hole, the second installation hole is formed in the cutting head and communicated with the first installation hole, the fastener is arranged through the first installation hole and the second installation hole, the fastener comprises the rod part and the head part, the rod part is provided with the first stepped section and the second stepped section arranged in the axial direction, the radial dimension of the first stepped section is larger than the radial dimension of the second stepped section, the first limiting part is arranged on the circumferential side wall of the second stepped section in the radial direction at one end of the first stepped section facing the second stepped section, the head part is connected with one end of the first stepped section away from the second stepped section, the second limiting part is arranged on the circumferential side wall of the first stepped section in the radial direction at one end of the head part facing the rod part, the distance between the first limiting part and the second limiting part is L1 in the axial direction, the thickness of the part of the second installation hole through which the rod part passes is L2, L1>L2, the anti-loosening washer is arranged in the first installation hole and abuts against the first limiting part, so that the fastener can be axially limited to the cutting head, the locking and fixing of the fastener relative to the cutting head shaft can be realized, the cutting head will not drive the fastener to loosen when the cutting head shaft rotates relative to the cutting head, the effective anti-loosening purpose is achieved, the cutting head is prevented from falling off the cutting head shaft, and the use performance and service life of the heading machine are improved.

[0020] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the following preferred embodiments are specifically described below, and the accompanying drawings are referred to for detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0022] Figure 1 The structure schematic view of the cutting head locking and anti-loosening structure provided by the embodiments of the utility model is shown in the figure.

[0023] Figure 2 The structure schematic view of the cutting head locking and anti-loosening structure provided by the embodiments of the utility model is shown in the figure. Figure 1 The enlarged structure schematic view of the part A in the figure.

[0024] Figure 3 The structure schematic view of the fastener in the cutting head locking and anti-loosening structure provided by the embodiments of the utility model is shown in the figure.

[0025] Icon: 11 - cutting head shaft; 110 - first mounting hole; 111 - first boss; 12 - cutting head; 120 - second mounting hole; 121 - second boss; 13 - key connection portion; 20 - fastener; 21 - head portion; 22 - shank portion; 221 - first stepped section; 222 - second stepped section; 223 - first stop portion; 224 - second stop portion; 30 - gap; 40 - lock washer. DETAILED DESCRIPTION

[0026] The following detailed description is presented to aid the reader in gaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents can be used, and the

[0027] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, these examples are provided as illustration of some of the many possible forms in which the methods, apparatuses, and / or systems described herein can be implemented.

[0028] Throughout the specification, when an element (such as a layer, region, or substrate) is referred to as being “on”, “connected to”, “coupled to”, “bonds to”, “on top of”, or “covering” another element, it can be directly on, connected to, coupled to, bonds to, on top of, or covering the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being “directly on”, “directly connected to”, “directly coupled to”, “directly bonds to”, “directly on top of”, or “directly covering” another element, there are no other elements interposed therebetween.

[0029] As used herein, the term “and / or” includes any one of the listed items and any combination of any two or more of the listed items.

[0030] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0031] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0032] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0033] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0034] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0035] According to a first aspect of the present invention, a cutting head locking and anti-loosening structure is provided, which includes a cutting head 12, a cutting head shaft 11, a fastener 20, and an anti-loosening washer 40.

[0036] Hereinafter, the specific structure of the above components of the cutting head locking and anti-loosening structure according to the present embodiment will be described.

[0037] In the present embodiment, as shown in Figure 1 , the cutting head shaft 11 is provided with a first mounting hole 110 at one end in the axial direction; the cutting head 12 is mounted at the end of the cutting head shaft 11 provided with the first mounting hole 110, part of the cutting head 12 is wrapped around the circumferential side wall of the cutting head shaft 11, and a key connection part 13, such as a spline pair, is arranged therebetween, so that the cutting head 12 and the cutting head shaft 11 can rotate together in the circumferential direction.

[0038] As shown in Figure 1 , the cutting head 12 is provided with a second mounting hole 120 communicating with the first mounting hole 110, the first mounting hole 110 is a blind hole, and the second mounting hole 120 is a through hole. Preferably, the first mounting hole 110 and the second mounting hole 120 are coaxially arranged, and the axis of the first mounting hole 110 or the axis of the second mounting hole 120 is parallel to the axis of the cutting head shaft 11.

[0039] As shown in Figure 1 and Figure 2 , the fastener 20 is arranged through the first mounting hole 110 and the second mounting hole 120, specifically, the fastener 20 sequentially passes through the second mounting hole 120 and the first mounting hole 110 from the side of the cutting head 12 facing away from the cutting head shaft 11.

[0040] More specifically, as shown in Figure 2 and Figure 3 , the fastener 20 includes a rod portion 22 and a head portion 21 arranged along the axial direction of the fastener 20 and connected to each other; the rod portion 22 is formed in a stepped shaft structure, having a first stepped section 221 and a second stepped section 222 arranged along the axial direction, the radial dimension of the first stepped section 221 is greater than that of the second stepped section 222, and a first limiting portion 223 is formed at the end of the first stepped section 221 facing the second stepped section 222, which protrudes radially from the circumferential side wall of the second stepped section 222.

[0041] Further, as shown in Figure 2 and Figure 3As shown, the head 21 is connected with one end of the first stepped section 221 away from the second stepped section 222, and a second limiting portion 224 provided along the circumferential side wall of the first stepped section 221 radially protruding is formed at the end of the head 21 facing the rod 22; the distance between the first limiting portion 223 and the second limiting portion 224 in the axial direction is L1, the thickness of the part of the second mounting hole 120 through which the rod 22 passes is L2, L1>L2, the lock washer 40 is arranged in the first mounting hole 110 and abuts against the first limiting portion 223, so that the second stepped section 222 completely extends into the first mounting hole 110, and part of the first stepped section 221 can also extend into the first mounting hole 110 and abut against the lock washer 40, so that the fastener 20 and the cutting head shaft 11 are pressed on both sides of the lock washer 40, achieving reliable locking. In this way, while ensuring that the fastener 20 can axially limit the cutting head 12, the locking and fixing of the fastener 20 relative to the cutting head shaft 11 can also be achieved, so that when the cutting head shaft 11 rotates relative to the cutting head 12, the cutting head 12 will not drive the fastener 20 to loosen, achieving effective locking and avoiding the cutting head 12 from falling off the cutting head shaft 11, thereby improving the use performance and service life of the roadheader.

[0042] It should be noted that in this application, the axial direction is the horizontal direction under the perspective view, and the radial direction is perpendicular to the axial direction. Figure 1 It should be noted that in this application, the axial direction is the horizontal direction under the perspective view, and the radial direction is perpendicular to the axial direction.

[0043] Further, in this embodiment, as shown in Figure 1 and Figure 2 , the first mounting hole 110 is formed as a stepped hole with a first boss 111, the first boss 111 is formed as an annular surface extending in the radial direction, so that the radial dimension of the end of the first mounting hole 110 facing the outside of the cutting head shaft 11 is larger, thereby being able to accommodate the lock washer 40. The end of the lock washer 40 away from the first limiting portion 223 abuts against the first boss 111, so that the lock washer 40 is clamped between the first boss 111 and the first limiting portion 223, achieving reliable axial fixation of the fastener 20 and the cutting head shaft 11 to avoid loosening.

[0044] Further, in this embodiment, as shown in Figure 1 and Figure 2 , the second mounting hole 120 is formed as a stepped hole with a second boss 121, the second boss 121 is formed as an annular surface extending in the radial direction, and the second limiting portion 224 abuts against the second boss 121, so that the cutting head 12 is clamped between the head 21 and the cutting head shaft 11, achieving axial fixation of the cutting head 12.

[0045] Preferably, in this embodiment, as shown in Figure 1 and Figure 2As shown, the anti-loose washer 40 is formed as an annular structure sleeved on the second stepped section 222, and the radial dimension of the inner side wall of the anti-loose washer 40 is smaller than the radial dimension of the first stepped section 221, so as to ensure that the anti-loose washer 40 can abut against the first limiting portion 223 and ensure the anti-loose effect.

[0046] Further, as shown in Figure 2 the radial dimension of the outer side wall of the anti-loose washer 40 is greater than the radial dimension of the first stepped section 221, so as to increase the contact area of the anti-loose washer 40 and the first limiting portion 223, thereby further improving the anti-loose effect.

[0047] Preferably, as shown in Figure 2 the radial dimension of the outer side wall of the anti-loose washer 40 is greater than the radial dimension of the end of the second mounting hole 120 facing the cutting head shaft 11, so that before the fastener 20 is installed, the end of the anti-loose washer 40 facing the outside of the cutting head shaft 11 can be limited by the cutting head 12, avoiding the anti-loose washer 40 from falling off from the first mounting hole 110.

[0048] In the preferred embodiment, as shown in Figure 2 there is a gap 30 between the circumferential side wall of the fastener 20 and the second mounting hole 120, specifically, there is a gap 30 between the circumferential side wall of the first stepped section 221 and the hole wall of the second mounting hole 120, and there is a gap 30 between the circumferential side wall of the head 21 and the hole wall of the second mounting hole 120, so that the fastener 20 can only limit the displacement of the cutting head 12 in the axial direction, avoiding the cutting head 12 from falling off from the cutting head shaft 11, without affecting the small rotation of the cutting head 12 relative to the cutting head shaft 11.

[0049] In the present embodiment, as shown in Figure 1 and Figure 2 the circumferential side wall of the second stepped section 222 is provided with a thread, and correspondingly, the first mounting hole 110 is formed with an internal thread matched with the second stepped section 222, so that the fastener 20 is threadedly connected with the cutting head shaft 11, realizing the fixation of the fastener 20 and the cutting head shaft 11.

[0050] In the alternative embodiment, as shown in Figure 1 and Figure 2 at least part of the head 21 is arranged outside the second mounting hole 120, so as to avoid that the space for accommodating the head 21 on the second mounting hole 120 is too large to affect the structural strength of the cutting head 12, and facilitate the inspection and maintenance of the fastener 20.

[0051] In addition, in the preferred embodiment, as shown in Figure 1As shown, the fastener 20 is provided with a plurality of fasteners 20, which are arranged at intervals around the axis of the cutting head shaft 11 to improve the reliability of the cutting head shaft 11 to the cutting head fixed on the cutting head shaft 11, preferably, the plurality of fasteners 20 are arranged at equal intervals around the axis of the cutting head shaft 11 to ensure uniform stress.

[0052] According to the cutting head locking and anti-loosening structure, the first mounting hole is arranged at one end of the cutting head shaft in the axial direction, the cutting head is mounted at one end of the cutting head shaft provided with the first mounting hole, and the second mounting hole is arranged on the cutting head and communicates with the first mounting hole; the fastener is arranged in the first mounting hole and the second mounting hole; the fastener comprises a rod portion and a head portion; the rod portion comprises a first stepped section and a second stepped section arranged in the axial direction, the radial dimension of the first stepped section is greater than that of the second stepped section, and a first limiting portion is arranged on the circumferential side wall of the second stepped section and protrudes radially from the second stepped section at one end of the first stepped section facing the second stepped section; the head portion is connected to one end of the first stepped section away from the second stepped section, and a second limiting portion is arranged on the circumferential side wall of the first stepped section and protrudes radially from the first stepped section at one end of the head portion facing the rod portion; in the axial direction, the distance between the first limiting portion and the second limiting portion is L1, the thickness of the part of the second mounting hole through which the rod portion passes is L2, and L1>L2; the anti-loosening washer is arranged in the first mounting hole and abuts against the first limiting portion, so that the fastener can not only axially limit the cutting head but also lock and fix the fastener relative to the cutting head shaft, so that when the cutting head shaft rotates relative to the cutting head, the cutting head will not drive the fastener to loosen, the purpose of effective anti-loosening is achieved, and the situation that the cutting head falls off the cutting head shaft is avoided.

[0053] The second aspect of the utility model provides a heading machine, including the cutting head locking and anti-loosening structure as described above, when the cutting head shaft rotates relative to the cutting head, the cutting head will not drive the fastener to loosen, so that the use performance and service life of the heading machine are improved.

[0054] Finally, it should be noted that: the above-described embodiments are merely specific embodiments of the present application, which are used to illustrate the technical solutions of the present application, but not to limit them, and the protection scope of the present application is not limited thereto, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art within the technical range disclosed by the present application can modify or easily think of changes to the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to some technical features thereof, and these modifications, changes or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and all should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cutting head locking and anti-loosening structure, characterized in that, The cutting head locking and anti-loosening structure comprises: a cutting head shaft having a first mounting hole formed at one end in the axial direction; a cutting head mounted at one end of the cutting head shaft provided with the first mounting hole, the cutting head having a second mounting hole formed therein and communicating with the first mounting hole; a fastener passing through the first mounting hole and the second mounting hole, the fastener comprising a rod portion and a head portion, the rod portion having a first stepped section and a second stepped section arranged in the axial direction, the first stepped section having a radial dimension greater than that of the second stepped section, and the first stepped section having a first limiting portion formed at one end thereof facing the second stepped section and protruding radially from the circumferential side wall of the second stepped section, the head portion being connected to one end of the first stepped section away from the second stepped section, and the head portion having a second limiting portion formed at one end thereof facing the rod portion and protruding radially from the circumferential side wall of the first stepped section, the distance between the first limiting portion and the second limiting portion in the axial direction being L1, the thickness of the portion of the second mounting hole through which the rod portion passes being L2, and L1>L2; an anti-loosening washer arranged in the first mounting hole and abutting against the first limiting portion.

2. The locking structure of the cutting head according to claim 1, characterized in that, The first mounting hole is formed as a stepped hole having a first boss, and one end of the anti-loosening washer away from the first limiting portion abuts against the first boss.

3. The locking structure of the cutting head according to claim 1, characterized in that, The second mounting hole is formed as a stepped hole having a second boss, and the second limiting portion abuts against the second boss.

4. The locking structure of the cutting head according to claim 1, characterized in that, At least part of the head portion is arranged outside the second mounting hole.

5. The locking structure of the cutting head according to claim 1, characterized in that, The anti-loosening washer is formed as an annular structure sleeved on the second stepped section, and the radial dimension of the inner side wall of the anti-loosening washer is smaller than that of the first stepped section.

6. The locking structure of the cutting head according to claim 5, characterized in that, The radial dimension of the outer side wall of the anti-loosening washer is greater than that of the first stepped section.

7. The locking structure of the cutting head according to claim 1, characterized in that, The circumferential side wall of the fastener has a gap with the second mounting hole.

8. The locking structure of the cutting head according to claim 1, characterized in that, The circumferential side wall of the second stepped section is provided with a thread.

9. The locking structure of the cutting head according to claim 1, characterized in that, The fastener is provided in plurality, and the plurality of fasteners are arranged at intervals around the axis of the cutting head shaft.

10. A heading machine characterized by The cutting head locking and anti-loosening structure comprises any one of claims 1 to 9. The cutting head locking and anti-loosening structure comprises any one of claims 1 to 9.

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