CN214303830U

CN214303830U - Rear support structure and heading machine

Info

Publication number: CN214303830U
Application number: CN202120214635.7U
Authority: CN
Inventors: 席亚兵; 盖巍巍; 廉浩
Original assignee: Sany Heavy Equipment Co Ltd
Current assignee: Sany Heavy Equipment Co Ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-09-28
Anticipated expiration: 2031-01-26

Abstract

The utility model provides a back bearing structure and entry driving machine, back bearing structure includes: a rear support frame; the fixing seat is connected with the rear supporting frame; the supporting component is connected with the fixed seat in a sliding manner and can slide on the fixed seat along the height direction of the rear supporting structure; and the driving component is connected with the supporting component and used for driving the supporting component to slide in the height direction. The technical scheme of the utility model in, because supporting component is under drive assembly's effect, along vertical direction lift removal. When supporting component contacted with ground like this, can produce a perpendicular to ground's reaction force to with the vertical lifting of other spare parts of support frame and the entry driving machine of installing on the support frame, thereby avoided the back supporting structure among the correlation technique to receive the restriction of self structure, back supporting structure is behind other spare parts of lifting entry driving machine, the problem that the entry driving machine can slide forward or backward for ground, and then make other spare parts of back supporting structure can vertical lifting entry driving machine.

Description

Rear support structure and heading machine

Technical Field

The embodiment of the utility model provides a relate to entry driving machine equipment technical field particularly, relate to a back bearing structure and entry driving machine.

Background

At present, when a heading machine performs heading work or a walking part is overhauled, a shovel plate and a rear supporting structure are needed to be utilized to lift the whole machine, and the effect of supporting the whole machine is achieved. However, the rear support structure is limited by its own structure, and when the rear support structure is lifted, the heading machine may slip forward or backward, which may cause inaccurate attitude adjustment of the heading machine.

SUMMERY OF THE UTILITY MODEL

The present invention aims at least solving one of the technical problems existing in the prior art or the related art.

Therefore, an object of the present invention is to provide a rear supporting structure.

Another object of the utility model is to provide a heading machine.

In order to achieve the above object, an embodiment of the utility model provides a back bearing structure, back bearing structure includes: a rear support frame; the fixing seat is connected with the rear supporting frame; the supporting component is connected with the fixed seat in a sliding manner and can slide on the fixed seat along the height direction of the rear supporting structure; and the driving component is connected with the supporting component and used for driving the supporting component to slide in the height direction.

In this technical scheme, because supporting component under drive assembly's effect, along rear supporting structure's direction of height, vertical direction promptly, lift removal. When the supporting component is contacted with the ground, a vertical upward reaction force perpendicular to the ground can be generated, so that the supporting frame and other parts of the heading machine installed on the supporting frame are vertically lifted, the problem that the heading machine slides forwards or backwards relative to the ground after the supporting structure lifts the other parts of the heading machine is avoided, and further the supporting structure can vertically lift the other parts of the heading machine, so that the posture of the heading machine can be accurately adjusted, and the heading work is better completed.

Additionally, the utility model provides a back bearing structure in the above-mentioned embodiment can also have following additional technical characteristics:

in above-mentioned technical scheme, be provided with the mounting hole on the fixing base, the mounting hole extends the setting along the direction of height, and supporting component includes: the guide shaft is slidably arranged in the mounting hole; and the supporting piece is connected with one end of the guide shaft, which is far away from the fixed seat.

In the technical scheme, the guide shaft is matched with the mounting hole, and the hole wall of the mounting hole has a guide effect, so that the guide shaft can only stretch out and draw back in the vertical direction. Therefore, the heading machine can only vertically lift, the posture of the heading machine can be accurately adjusted, and the heading work can be better completed.

In any of the above solutions, the support member includes: the top plate is provided with a first end surface and a second end surface, and the first end surface is connected with the guide shaft; and the side end of at least one side plate is connected with the second end face.

In the technical scheme, the side plates increase the contact area between the supporting piece and the ground, so that the grounding specific pressure of the supporting piece and the ground is smaller, the side plates are suitable for soft rock or mud ground which is easy to collapse, and the application range of the heading machine is further improved.

In any one of the above technical solutions, when the supporting member includes a plurality of side plates, the plurality of side plates are arranged along the length direction of the rear supporting structure at intervals.

In the technical scheme, the n-shaped structure is formed by the plurality of side plates and the top plate, so that the contact area between the support piece and the ground is increased, the ground specific pressure of the support piece and the ground is smaller, the support piece is suitable for soft rock or slurry ground which is easy to collapse, and the application range of the heading machine is further widened.

In any one of the above technical solutions, the driving assembly includes two supporting cylinders, and the two supporting cylinders are symmetrically arranged with respect to a central axis of the guide shaft.

In the technical scheme, the two supporting oil cylinders are symmetrically arranged relative to the central axis of the guide shaft. Therefore, the guide shaft is uniformly stressed and can stably lift in the mounting hole, so that the heading machine can be stably lifted in the vertical direction, and the working stability and reliability of the heading machine are improved.

In any one of the above technical solutions, the support cylinder includes a cylinder body and a piston rod telescopically disposed in the cylinder body, the cylinder body is rotatably connected with the fixing seat, and the piston rod is rotatably connected with the top plate of the support member.

In the technical scheme, the supporting oil cylinder can drive the guide shaft to lift as the driving piece, and the supporting oil cylinder is rotatably connected with the supporting piece and the fixing seat, so that the supporting oil cylinder does not have the phenomenon of jamming or blocking in the process of telescopically driving the guide shaft, and the working stability and reliability of the rear supporting structure are improved.

In any of the above technical solutions, the rear support structure further includes a connection seat, and the connection seat is disposed on the fixing seat and/or the support assembly, and is rotatably connected with the driving assembly. The connecting seat is provided with first connecting hole, is provided with the second connecting hole on the drive assembly, and back bearing structure still includes the round pin axle, and the round pin axle is worn to establish in first connecting hole and second connecting hole.

In this technical scheme, fixing base and supporting component pass through the connecting seat and are connected with drive assembly rotation, and the connecting seat has improved the joint strength of fixing base and drive assembly to and supporting component and drive assembly's joint strength, thereby satisfy fixing base and drive assembly's joint strength requirement, and supporting component and drive assembly's joint strength requirement, and then guarantee back bearing structure job stabilization nature and reliability, in order to ensure that the entry driving machine can smoothly go up and down. The connecting seat is connected with the driving assembly in a rotating mode through the pin shaft, the fixing seat is connected with the driving assembly in a rotating mode through the connecting seat, the supporting assembly is connected with the driving assembly in a rotating mode, and therefore the working stability and reliability of the rear supporting structure are improved.

In any of the above technical solutions, the rear support structure further includes anti-skid wear-resistant strips, and the anti-skid wear-resistant strips are disposed on the support member of the support assembly and located on one side of the support member away from the guide shaft of the support assembly.

In the technical scheme, the anti-skid wear-resistant strips have an anti-skid effect, and the anti-skid wear-resistant strips can ensure that the rear support structure does not slide when other parts of the heading machine are lifted. Therefore, the rear supporting structure can vertically lift other parts of the heading machine, the posture of the heading machine can be accurately adjusted, and heading work can be better completed.

In any of the above technical solutions, the rear supporting structure further includes a pressing plate and a fixing bolt, the pressing plate is used for fixing the pin shaft of the rear supporting structure, and the fixing bolt is used for fixing the pressing plate.

In this technical scheme, the clamp plate is used for fixing back bearing structure's round pin axle, ensures like this that the round pin axle does not fall out in first connecting hole and the second connecting hole, and then ensures that back bearing structure can normally work.

The utility model discloses technical scheme of second aspect provides a heading machine, and the heading machine includes: a body portion; and a rear support structure as in any one of the first aspect solutions, the rear support structure being connected with the body portion.

The utility model discloses the entry driving machine that technical scheme of second aspect provided, because of the back bearing structure including any one in the first aspect technical scheme, therefore have all beneficial effects that any above-mentioned technical scheme had, no longer describe here.

In the scheme, the heading machine is integrated with the rear supporting structure, so that the heading machine can vertically lift and cannot slide forwards or backwards relative to the ground in the lifting process or after lifting, the posture of the heading machine can be accurately adjusted, and the heading work can be better finished.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view illustrating a rear support structure in the related art;

fig. 2 shows a schematic perspective view of a rear support structure according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 and fig. 2 is:

10', a rear support frame; 20', a rear support oil cylinder; 30', support legs; 40', an oil cylinder pin shaft; 50', a supporting leg swinging pin shaft; 10. a rear support frame; 20. a fixed seat; 30. a support assembly; 32. a guide shaft; 34. a support member; 342. a top plate; 3422. a first end face; 3424. a second end face; 344. a side plate; 40. a drive assembly; 42. a support cylinder; 50. a connecting seat; 60. a pin shaft; 70. anti-skid wear-resistant strips; 80. pressing a plate; 90. fixing the bolt; 100. and locking the bolt.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

It should be noted that the rear support structure of the heading machine functions as follows:

1. other auxiliary functional components such as a pump station motor assembly, an electric cabinet and the like can be placed on the rear supporting structure.

2. When the heading machine is used for heading or the walking part is overhauled, the whole machine is lifted by using the shovel plate and the rear supporting structure, and the function of supporting the whole machine is achieved.

It should be noted that the rear support structure of the heading machine in the related art is composed of a rear support frame, two rear support cylinders which are bilaterally symmetric, two support legs, a cylinder pin shaft, a support leg swing pin shaft and other parts. When the heading machine is lifted by using the rear support structure, a hydraulic circuit is generally used for supplying oil to the rear support oil cylinder, the rear support oil cylinder extends to force the support legs to rotate downwards around the support leg swinging pin shafts under the action of the extension of the oil cylinder until the support legs are contacted with the ground, and the whole heading machine is lifted by using the reaction force under the continuous extension action of the rear support oil cylinder.

Specifically, as shown in fig. 1, the rear support structure of the heading machine in the related art is composed of a rear support frame 10 ', two rear support cylinders 20 ' that are bilaterally symmetric, two support legs 30 ', a cylinder pin 40 ', a support leg swing pin 50 ', and other parts. When the heading machine is lifted by using the rear support structure, a hydraulic circuit is generally used for supplying oil to the rear support oil cylinder 20 ', the rear support oil cylinder 20 ' extends, the supporting legs 30 ' are forced to rotate downwards around the supporting leg swinging pin shafts 50 ' under the action force of the rear support oil cylinder 20 ' until the supporting legs 30 ' are contacted with the ground, a reaction force is generated under the continuous extension action of the rear support oil cylinder 20 ', and the whole machine of the heading machine is lifted under the action of the reaction force.

A rear support structure according to some embodiments of the present invention is described below with reference to fig. 2.

As shown in fig. 2, the present invention provides a rear supporting structure, which includes a rear supporting frame 10, a fixing base 20, a supporting component 30 and a driving component 40. Wherein, fixing base 20 is connected with back support frame 10, and supporting component 30 and fixing base 20 sliding connection to can follow rear bearing structure's direction of height and slide on fixing base 20. The driving assembly 40 is connected to the support assembly 30 for driving the support assembly 30 to slide in the height direction.

In the above arrangement, since the support assembly 30 is moved up and down in the height direction of the rear support structure, i.e., the vertical direction, by the driving assembly 40. When the supporting component 30 is contacted with the ground, a vertical upward reaction force perpendicular to the ground can be generated, so that the rear supporting frame 10 and other parts of the heading machine installed on the supporting frame are vertically lifted, the limitation that a rear supporting structure in the related technology is limited by the structure of the rear supporting structure is avoided, the heading machine can slide forwards or backwards relative to the ground after the rear supporting structure lifts the other parts of the heading machine, the rear supporting structure can vertically lift the other parts of the heading machine, the posture of the heading machine can be accurately adjusted, and the heading work can be better completed.

It should be noted that, after the heading machine is lifted, if the heading machine slides forwards or backwards relative to the ground, the horizontal positions of other parts of the heading machine are shifted, for example, the cutting part is shifted, the cutting position of the cutting part is changed, and the heading machine may not be accurately adjusted in posture. The fixing base 20 is detachably connected to the rear support frame 10, and specifically, the fixing base 20 is fixed to the rear support frame 10 by the locking bolt 100.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the fixing base 20 is provided with a mounting hole, the mounting hole extends along the height direction of the rear supporting structure, and the supporting assembly 30 includes a guiding shaft 32 and a supporting member 34. Wherein the guide shaft 32 is slidably disposed within the mounting hole. The support 34 is connected to an end of the guide shaft 32 remote from the fixed base 20.

In the above arrangement, the guide shaft 32 is matched with the mounting hole, and the hole wall of the mounting hole has a guiding function, so that the guide shaft 32 can only extend and retract in the vertical direction. Therefore, the heading machine can only vertically lift, the posture of the heading machine can be accurately adjusted, and the heading work can be better completed.

Specifically, in the embodiment of the present invention, the guiding shaft 32 is provided as a circular shaft, and the mounting hole is correspondingly provided as a circular hole adapted to the guiding shaft. Of course, the guide shaft 32 may be configured as a square shaft or other shaped shaft, and the mounting hole may be configured as a square hole or other shaped hole adapted to the guide shaft.

The supporting member 34 includes a top plate 342 and two side plates 344, the top plate 342 has a first end surface 3422 and a second end surface 3424, and the first end surface 3422 is connected to the guide shaft 32. The side ends of the two side plates 344 are connected to the second end surface 3424.

In the above arrangement, the side plates 344 increase the contact area between the support member 34 and the ground, so that the ground pressure ratio between the support member 34 and the ground is small, and the side plates are suitable for soft rock or mud ground which is easy to fall, and further improve the application range of the heading machine.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the supporting member 34 includes a top plate 342 and two side plates 344. Wherein the two side plates 344 are spaced apart along the length of the rear support structure.

In the above arrangement, the two side plates 344 and the top plate 342 form an n-shaped structure, so that the contact area between the support 34 and the ground is increased, the ground specific pressure between the support 34 and the ground is smaller, and the support is suitable for soft rock or mud ground which is easy to fall, and the application range of the heading machine is further improved.

Of course, the supporting member 34 may be configured as a flat plate structure to increase the contact area with the ground according to actual conditions. Alternatively, the support 34 may be provided with one or three or more side plates 344.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the driving assembly 40 includes two supporting cylinders 42, and the two supporting cylinders 42 are symmetrically disposed with respect to the central axis of the guide shaft 32.

In the above arrangement, the two support cylinders 42 are arranged symmetrically with respect to the central axis of the guide shaft 32. Therefore, the guide shaft 32 is stressed uniformly and can be lifted and lowered stably in the mounting hole, so that the heading machine can be lifted stably in the vertical direction, and the working stability and reliability of the heading machine are improved.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the supporting cylinder 42 includes a cylinder body and a piston rod telescopically disposed in the cylinder body, the cylinder body is rotatably connected to one side of the fixing base 20, and the piston rod is rotatably connected to the top plate 342 of the supporting member 34.

In the above arrangement, the supporting cylinder 42 as a driving member can drive the guiding shaft 32 to ascend and descend, and since the supporting cylinder 42 is rotatably connected with the supporting member 34 and the fixing base 20, the supporting cylinder 42 is not jammed or jammed in the process of driving the guiding shaft 32 to extend or retract, thereby improving the stability and reliability of the operation of the rear supporting structure.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the rear supporting structure further includes a plurality of connecting seats 50, the connecting seats 50 are respectively disposed on the fixing seat 20 and the supporting assembly 30, and the driving assembly 40 corresponds to and is rotatably connected to the connecting seats 50.

In the above arrangement, the fixing base 20 and the supporting component 30 are rotatably connected with the driving component 40 through the connecting base 50, the connecting base 50 improves the connection strength between the fixing base 20 and the driving component 40 and the connection strength between the supporting component 30 and the driving component 40, so that the connection strength requirement between the fixing base 20 and the driving component 40 is met, the connection strength requirement between the supporting component 30 and the driving component 40 is met, the working stability and reliability of the rear supporting structure are ensured, and the heading machine can be stably lifted.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the connecting seat 50 is provided with a first connecting hole, the driving assembly 40 is provided with a second connecting hole, the rear supporting structure further includes a pin 60, and the pin 60 is inserted into the first connecting hole and the second connecting hole.

In the above arrangement, the connecting seat 50 is rotatably connected to the driving assembly 40 through the pin shaft 60, so that the connecting seat 50 rotatably connects the fixing seat 20 to the driving assembly 40, and the supporting assembly 30 is rotatably connected to the driving assembly 40, thereby improving the working stability and reliability of the rear supporting structure.

It should be noted that, as shown in fig. 2, in the embodiment of the present invention, the rear supporting structure further includes a pressing plate 80 and a fixing bolt 90. The pressing plate 80 is used for fixing the pin shaft 60, and the fixing bolt 90 is used for fixing the pressing plate 80. Specifically, the pin 60 is provided with a locking groove, and the pressing plate 80 is locked into the locking groove as a locking plate to axially fix the pin 60 on the connecting seat 50.

Specifically, as shown in fig. 2, in the embodiment of the present invention, the rear supporting structure further includes an anti-skid wear-resistant strip 70, and the anti-skid wear-resistant strip 70 is disposed on the supporting member 34 of the supporting assembly 30 and is located on one side of the supporting member 34 away from the guiding shaft 32.

In the above arrangement, the anti-slip wear-resistant strips 70 have an anti-slip function, and the anti-slip wear-resistant strips 70 can ensure that the rear support structure does not slip when other parts of the heading machine are lifted. Therefore, the rear supporting structure can vertically lift other parts of the heading machine, the posture of the heading machine can be accurately adjusted, and heading work can be better completed.

Specifically, as shown in fig. 2, in the embodiment of the present invention, there are two anti-slip wear-resistant strips 70, and the two anti-slip wear-resistant strips 70 are disposed at the bottom of the two side plates 344 in a one-to-one correspondence. Further, the anti-skid wear strips 70 include a plurality of wear blocks spaced along the extending direction of the support 34, the wear blocks are welded to the bottom of the side plate 344, and the cross section of the wear blocks is V-shaped. The cross section of the wear-resistant block can be set to be rectangular or trapezoidal or other shapes according to actual conditions. The length of the anti-slip wear strips 70 is less than the length of the side plates 344.

The utility model also provides a heading machine, heading machine include this somatic part and as the back bearing structure of any one in the embodiment of the first aspect. The rear support structure is connected with the body portion.

The utility model discloses the entry driving machine that technical scheme of second aspect provided, because of the back bearing structure including any one in the first aspect embodiment, therefore have all beneficial effects that any above-mentioned embodiment had, no longer describe herein.

In the arrangement, the heading machine is integrated with the rear supporting structure, so that the heading machine can vertically lift and cannot slide forwards or backwards relative to the ground in the lifting process or after lifting, the posture of the heading machine can be accurately adjusted, and the heading work can be better completed.

When the heading machine needs to lift the rear support, the hydraulic system supplies oil to the left and right support cylinders 42 simultaneously, and the support cylinders 42 extend under the action of hydraulic oil to force the n-shaped structure to vertically move towards the ground under the action of the guide shaft 32, and finally contact with the ground and generate a reaction force to lift the equipment.

The heading machine in this application has following advantage:

1. the bottom surface of the n-shaped structure is a plane, so that the contact area is large, the grounding specific pressure is small, the bearing is not easy to collapse, and the bearing is particularly suitable for the easily collapsed ground or soft rock ground;

2. the plane of the force generated by the support cylinder 42 is ideally perpendicular to the ground, so that the reaction force generated can lift the apparatus vertically without generating a component force that would cause the apparatus to move forward or backward.

From the above description, it can be seen that since the support assembly 30 is moved up and down in the height direction of the rear support structure, i.e., the vertical direction, by the driving assembly 40. When the supporting component 30 is contacted with the ground, a vertical upward reaction force perpendicular to the ground can be generated, so that the rear supporting frame 10 and other parts of the heading machine installed on the supporting frame are vertically lifted, the limitation that a rear supporting structure in the related technology is limited by the structure of the rear supporting structure is avoided, the heading machine can slide forwards or backwards relative to the ground after the rear supporting structure lifts the other parts of the heading machine, the rear supporting structure can vertically lift the other parts of the heading machine, the posture of the heading machine can be accurately adjusted, and the heading work can be better completed.

In the present application, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rear support structure, comprising:

a rear support frame (10);

the fixing seat (20) is connected with the rear support frame (10);

the supporting component (30) is connected with the fixed seat (20) in a sliding mode, and the supporting component (30) can slide on the fixed seat (20) along the height direction of the rear supporting structure;

and the driving assembly (40) is connected with the supporting assembly (30) and is used for driving the supporting assembly (30) to slide in the height direction.

2. Rear support structure according to claim 1, characterized in that the fixing base (20) is provided with a mounting hole extending along the height direction, and the support assembly (30) comprises:

a guide shaft (32) slidably disposed within the mounting hole;

and the supporting piece (34) is connected with one end of the guide shaft (32) far away from the fixed seat (20).

3. Rear support structure according to claim 2, characterized in that said support (34) comprises:

a top plate (342) having a first end surface (3422) and a second end surface (3424), the first end surface (3422) being connected to the guide shaft (32);

at least one side plate (344), the side end of the at least one side plate (344) is connected with the second end face (3424).

4. The rear support structure of claim 3, wherein when the support member (34) includes a plurality of side plates (344), the plurality of side plates (344) are spaced apart along a length of the rear support structure.

5. Rear support structure according to claim 2, characterized in that the drive assembly (40) comprises two support cylinders (42), the two support cylinders (42) being arranged symmetrically with respect to the central axis of the guide shaft (32).

6. Rear support structure according to claim 5, characterized in that the support cylinder (42) comprises a cylinder body and a piston rod telescopically arranged in the cylinder body, the cylinder body is rotatably connected with the fixed seat (20), and the piston rod is rotatably connected with the top plate (342) of the support member (34).

7. The rear support structure according to any one of claims 1 to 6, further comprising a connecting seat (50), wherein the connecting seat (50) is disposed on the fixing seat (20) and/or the support component (30) and rotatably connected with the driving component (40), the connecting seat (50) is provided with a first connecting hole, the driving component (40) is provided with a second connecting hole, and the rear support structure further comprises a pin shaft (60), wherein the pin shaft (60) penetrates through the first connecting hole and the second connecting hole.

8. The rear support structure according to any one of claims 1 to 6, characterized in that it further comprises anti-skid wear strips (70), said anti-skid wear strips (70) being provided on the support (34) of the support assembly (30) on the side of the support (34) remote from the guide shaft (32) of the support assembly (30).

9. Rear support structure according to any of claims 1 to 6, characterized in that it further comprises a pressure plate (80) and a fixing bolt (90), said pressure plate (80) being used to fix the pin (60) of the rear support structure, said fixing bolt (90) being used to fix said pressure plate (80).

10. A heading machine, characterized by comprising:

a body portion;

and a rear support structure as claimed in any one of claims 1 to 9, connected with the body portion.