Pantograph head assembly and pantograph

Abstract

The pantograph head assembly comprises a bottom frame, a top frame and a first elastic component, the bottom frame is used for being connected with an upper arm of the pantograph, the top frame comprises a carbon sliding plate, two inclined guide plates and two connecting frames, and the two connecting frames are fixed to the two ends of the carbon sliding plate respectively; the two connecting frames are movably connected to the corresponding inclined guide plates, the connecting frames and the inclined guide plates can move relatively in the width direction of the carbon sliding plate, the inclined guide plates are connected to the bottom frame, first elastic components are arranged between the connecting frames and the inclined guide plates, and second elastic components are arranged between the connecting frames and the inclined guide plates. And in the relative movement process of the connecting frame and the inclined guide plate, the first elastic component deforms. The carbon slide plate of the pantograph head assembly can slightly move in the advancing direction when being subjected to external force in the vehicle advancing direction, the first elastic component can deform, the buffering effect is achieved, and therefore the pantograph head assembly can be protected, damage to the pantograph head assembly under the external force is relieved, and the service life of the pantograph head assembly is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of power receiving equipment, and in particular to a bow head assembly and a pantograph. Background Art

[0002] The pantograph is usually installed on the top of the vehicle. During the operation of the vehicle, the pantograph can maintain contact with the contact network to receive electricity, thereby providing the vehicle with driving power. The pantograph usually includes a bracket and a carbon slide plate arranged on the bracket. During the movement of the vehicle, the carbon slide plate contacts the contact network and is subjected to the friction resistance applied by the contact network. The friction resistance will be applied to the bracket through the carbon slide plate, causing the bracket to be stressed for a long time, and the bracket is prone to skew and deformation, which in turn affects the effective contact between the carbon slide plate on the pantograph and the contact network, shortening the life of the bow head assembly.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] In order to solve one of the above technical defects, the present application provides a bow head assembly and a pantograph.

[0005] This application provides the following technical solutions:

[0006] According to a first aspect of the present application, there is provided a bow head assembly, comprising:

[0007] A base frame, the base frame being used to connect an upper arm of the pantograph;

[0008] A top frame, the top frame includes a carbon slide, two inclined guide plates and two connecting frames, the two connecting frames are respectively fixed to the two ends of the carbon slide, the two connecting frames can be movably connected to the corresponding inclined guide plates, the connecting frames and the inclined guide plates can move relative to each other along the width direction of the carbon slide, and the inclined guide plates are connected to the bottom frame;

[0009] A first elastic component is disposed between the connecting frame and the inclined guide plate, and deforms during the relative movement of the connecting frame and the inclined guide plate.

[0010] Optionally, the connecting frame has a carbon plate connecting portion and a guide plate connecting portion, the carbon plate connecting portion is fixedly connected to the carbon slide plate, the guide plate connecting portion has two support arms, the end of the inclined guide plate is located between the two support arms, and the spacing between the two support arms is greater than the width of the inclined guide plate, so as to limit the movement of the inclined guide plate between the two support arms;

[0011] The first elastic component is disposed between the support arm and the inclined guide plate.

[0012] Optionally, first elastic components are respectively provided on both sides of the inclined guide plate of the bow head assembly along the width direction, and two ends of the first elastic component respectively abut against the inclined guide plate and the corresponding support arm.

[0013] Optionally, the inclined guide plate is provided with barrel grooves on both sides along the width direction;

[0014] One end of the first elastic component is accommodated in the barrel groove.

[0015] Optionally, a cylinder shell is provided on the support arm, and the cylinder shell is sleeved on the outside of the first elastic component;

[0016] The barrel shell is slidably connected to the barrel groove;

[0017] One end of the first elastic component is accommodated in the cylindrical shell.

[0018] Optionally, the cylinder shell has a straight cylinder and an end wall closing an opening on one side of the straight cylinder;

[0019] One end of the connecting piece passes through the supporting arm and is threadedly connected to the end wall, and the other end of the connecting piece is limited on the supporting arm;

[0020] The first elastic component abuts against the end wall.

[0021] Optionally, two ends of the first elastic component are respectively connected to the support arm and the inclined guide plate;

[0022] When the inclined guide plate rotates relative to the connecting frame, one end of the first elastic component and the inclined guide plate rotate synchronously, and the other end of the first elastic component and the support arm are fixed in position.

[0023] Optionally, the bow head assembly includes a second elastic component;

[0024] The chassis comprises a bottom beam and two side beams, wherein the two side beams are movably connected to two sides of the bottom beam respectively;

[0025] The side beam and the inclined guide plate are hinged;

[0026] Two ends of the second elastic component are respectively connected to the connecting frame and the bottom beam.

[0027] Optionally, the bow head assembly includes a third elastic component;

[0028] The bottom beam and the side beam can move relative to each other along the width direction of the carbon slide plate;

[0029] The third elastic component is disposed between the bottom beam and the side beam, and the third elastic component can be deformed during the relative movement of the bottom beam and the side beam.

[0030] According to a second aspect of the present application, a pantograph is provided, comprising: the above-mentioned pantograph head assembly.

[0031] By adopting the above technical solution, the present application has the following beneficial effects:

[0032] When the carbon slide plate of the bow head assembly of the present application is subjected to external force in the direction of vehicle travel, it will move slightly in the direction of travel, and the first elastic component will deform to play a buffering role, thereby protecting the bow head assembly, reducing damage to the bow head assembly under the action of external force, and extending the service life of the bow head assembly.

[0033] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0035] Figure 1 The figure is a schematic diagram of the structure of the bow head assembly provided in an embodiment of the present application;

[0036] Figure 2 Shown is an exploded view of a partial structure of a bow head assembly provided in an embodiment of the present application;

[0037] Figure 3 Another perspective view of the exploded view of the local structure of the bow head assembly provided by the embodiment of the present application is shown;

[0038] Figure 4 Shown is a cross-sectional view of a partial structure of a bow head assembly provided in an embodiment of the present application;

[0039] Figure 5 Another cross-sectional view of the bow head assembly provided by the embodiment of the present application is shown;

[0040] Figure 6 Shown is a schematic diagram of the structure of a pantograph provided in an embodiment of the present application;

[0041] Figure 7 The figure is a schematic diagram of the structure of the transfer shaft assembly provided in the embodiment of the present application;

[0042] Figure 8 Show Figure 7 A cross-sectional view of

[0043] Fig. 9A cross-sectional view showing a partial structure of a transfer shaft assembly provided in an embodiment of the present application.

[0044] In the figure: 1, bow head assembly; 11, bottom frame; 111, bottom beam; 112, side beam; 12, top frame; 121, inclined guide plate; 1211, barrel groove; 122, connecting frame; 1221, carbon plate connecting part; 12211, bottom plate; 12212, side plate; 1222, guide plate connecting part; 12221, support arm; 1223, barrel shell; 12231, end wall; 13, second elastic component; 131, bending section; 14, carbon slide plate; 141, main body; 142, convex strip; 15, convex shaft; 16, nut; 17, cavity; 18, first elastic component; 19, third elastic component; 110, connecting piece;

[0045] 2. Base;

[0046] 3. Lower arm;

[0047] 4. Adapter shaft assembly; 41. One-piece shaft body; 411. External flange; 42. Middle sleeve; 421. Middle groove; 422. External expansion groove; 4221. Annular groove; 423. Step surface; 43. Side sleeve; 44. Rigidity reinforcement member; 441. Main shaft; 442. Vertical extension body; 45. Fastener; 451. Conical surface; 46. First fastening fitting; 461. First cylinder; 462. First flange; 47. Second fastening fitting; 48. Circlip; 49. Circular ring; 410. Bearing;

[0048] 5. Upper arm.

[0049] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0051] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Embodiment 1

[0054] See also Figures 1 to 5 As shown, the embodiment of the present application provides a bow head assembly 1, which includes: a bottom frame 11, a top frame 12 and a first elastic component 18. The bottom frame 11 is used to connect the upper arm 5 of the pantograph, and the top frame 12 includes a carbon slide 14, two inclined guide plates 121 and two connecting frames 122. The two connecting frames 122 are respectively fixed to the two ends of the carbon slide 14, and the two connecting frames 122 can be movably connected to the corresponding inclined guide plates 121. The connecting frames 122 and the inclined guide plates 121 can move relative to each other along the width direction of the carbon slide 14 (i.e., the traveling direction of the vehicle), and the inclined guide plates 121 are connected to the bottom frame 11. The first elastic component 18 is arranged between the connecting frames 122 and the inclined guide plates 121. During the relative movement of the connecting frames 122 and the inclined guide plates 121, the first elastic component 18 is deformed.

[0055] When the carbon slide plate 14 of the bow head assembly 1 of the present application is subjected to an external force in the direction of travel of the vehicle, it will move slightly in the direction of travel, and the first elastic component 18 will deform to play a buffering role, thereby protecting the bow head assembly 1, reducing the damage of the bow head assembly 1 under the action of external forces, and extending the service life of the bow head assembly 1. It should be noted that the direction of travel of the vehicle is usually the width direction of the carbon slide plate 14.

[0056] In some possible implementations, the connecting frame 122 has a carbon plate connecting portion 1221 and a guide plate connecting portion 1222, the carbon plate connecting portion 1221 is fixedly connected to the carbon slide 14, the guide plate connecting portion 1222 has two support arms 12221, the end of the inclined guide plate 121 is located between the two support arms 12221, the spacing between the two support arms is greater than the width of the inclined guide plate 121, so as to limit the movement of the inclined guide plate 121 between the two support arms 12221, and the first elastic component 18 is disposed between the support arm 12221 and the inclined guide plate 121. Under the action of external force, the carbon slide 14 and the connecting frame 122 will move along the arrangement direction of the two support arms 12221, and during the movement of the carbon slide 14 and the connecting frame 122, the first elastic component 18 will elastically support the connecting frame 122 to absorb the impact force.

[0057] In some possible implementations, first elastic components 18 are respectively provided on both sides of the inclined guide plate 121 along the width direction, that is, two first elastic components 18 are respectively provided on both sides of the inclined guide plate 121 along the width direction, and the two ends of the first elastic component 18 are respectively pressed against the inclined guide plate 121 and the corresponding support arms 12221. When the carbon slide 14 moves along the arrangement direction of the two support arms 12221, the first elastic components 18 on both sides of the carbon slide 14 will be deformed, the first elastic component 18 on one side will be compressed, and the first elastic component 18 on the other side will be stretched. By respectively providing the first elastic components 18 on both sides of the inclined guide plate 121, double elastic buffering is provided, and the energy absorption buffering effect is better.

[0058] In some possible implementations, see Figure 5 As shown, the inclined guide plate 121 is provided with barrel grooves 1211 on both sides along the width direction, and one end of the first elastic component 18 is accommodated in the barrel groove 1211. The barrel groove 1211 has a function of accommodating and limiting one end of the first elastic component 18. The ends of the two first elastic components 18 that are close to each other are accommodated in the corresponding barrel grooves 1211 respectively.

[0059] In some possible implementations, see Figure 5 As shown, a cylinder shell 1223 is provided on the support arm 12221 , and the cylinder shell 1223 is sleeved on the outside of the first elastic component 18 . The cylinder shell 1223 is slidably connected to the cylinder groove 1211 , and one end of the first elastic component is accommodated in the cylinder shell 1223 .

[0060] The outer wall of the cylinder shell 1223 and the inner wall of the cylinder groove 1211 are both smooth wall surfaces, and the cylinder shell 1223 can slide along the groove depth direction of the cylinder groove 1211. The cylinder groove 1211 has a guiding effect on the cylinder shell 1223. The cylinder shell 1223 can accommodate the other end of the first elastic component 18, and the inner wall of the cylinder shell 1223 has a straightening effect on the first elastic component 18 to prevent the first elastic component 18 from bending and deforming along the radial direction of the cylinder shell 1223. The length of the first elastic component 18 is greater than the length of the cylinder shell 1223, and the first elastic component 18 partially extends out of the cylinder shell 1223 and abuts against the inner wall of the cylinder groove 1211.

[0061] In some possible implementations, see Figure 5As shown, the cylinder shell 1223 has a straight cylinder and an end wall 12231 that closes an opening on one side of the straight cylinder. One end of the connecting member 110 passes through the support arm 12221 and is threadedly connected to the end wall 12231. The other end of the connecting member 110 is limited on the support arm 12221, and the first elastic component 18 abuts against the end wall 12231. A thread groove may be provided on the end wall 12231. The connecting member 110 may be a bolt, the bolt of the bolt is threadedly connected to the thread groove, and the cap of the bolt is limited on the outside of the support arm 12221. The stud may pass through the end wall 12231 and extend to the inside of the straight cylinder. The first elastic component 18 may be a coil spring, and the end of the coil spring is sleeved on the stud. The bolt will not affect the installation of the coil spring, and the bolt also has the function of limiting the end of the coil spring.

[0062] In some possible implementation schemes, the two ends of the first elastic component 18 are respectively connected to the support arm 12221 and the inclined guide plate 121, when the inclined guide plate 121 rotates relative to the connecting frame 122, one end of the first elastic component 18 rotates synchronously with the inclined guide plate 121, and the other end of the first elastic component 18 is fixed in position with the support arm 12221, so that when the inclined guide plate 121 and the connecting frame 122 rotate relative to each other, the first elastic component 18 will be twisted and deformed by torsion, thereby playing a buffering role. When the external force is reduced, the first elastic component 18 restores its deformation and can act on the bow head assembly 1 to restore the shape of the bow head assembly 1.

[0063] In some possible implementations, see Figure 2 and Figure 3 As shown, the bow head assembly 1 includes a third elastic component 19, the bottom beam 111 and the side beam 112 can move relative to each other along the width direction of the carbon slide plate 14, and the third elastic component 19 is arranged between the bottom beam 111 and the side beam 112. During the relative movement of the bottom beam 111 and the side beam 112, the third elastic component 19 can be deformed. It should be noted that the matching relationship among the bottom beam 111, the side beam 112 and the third elastic component 19 in the embodiment of the present application is the same as the matching relationship among the inclined guide plate 121, the connecting frame 122 and the first elastic component 18 in the above text, and the matching relationship among the bottom beam 111, the side beam 112 and the third elastic component 19 will not be repeated in this application.

[0064] This embodiment also provides a pantograph, including: the above-mentioned pantograph head assembly 1.

[0065] Embodiment 2

[0066] See also Figures 1 to 5As shown, the embodiment of the present application describes the bow head assembly 1 in detail, which includes: a bottom frame 11, a top frame 12 and a second elastic component 13. The bottom frame 11 is used to connect the upper arm 5 of the pantograph, the top frame 12 and the bottom frame 11 are movably connected, a carbon slide plate 14 is provided on the top frame 12, and the second elastic component 13 is provided between the bottom frame 11 and the top frame 12, and the two ends of the second elastic component 13 are respectively connected to the bottom frame 11 and the top frame 12.

[0067] The top frame 12 and the bottom frame 11 of the bow head assembly 1 of the present application are movably connected, and there is a margin of movement between the two. The present application sets a second elastic component 13 between the bottom frame 11 and the top frame 12. When the carbon slide plate 14 on the top frame 12 is subjected to a large external force, the top frame 12 can move to the side of the bottom frame 11, and the second elastic component 13 is compressed, playing a role of buffer support. When the carbon slide plate 14 is subjected to a reduced external force, the second elastic component 13 can push the top frame 12 to reset, which is conducive to the carbon slide plate 14 and the contact network to fully and effectively contact. The bow head assembly 1 of the present application can automatically deform and adjust according to the external force, so that the carbon slide plate 14 and the contact network maintain good contact. The bow head assembly 1 has good durability and a longer service life.

[0068] In some possible embodiments, the top frame 12 includes two inclined guide plates 121 and two connecting frames 122, the two connecting frames 122 are respectively fixed to the two ends of the carbon slide board 14, the two inclined guide plates are respectively movably connected to the corresponding connecting frames 122, the inclined guide plates 121 are movably connected to the bottom frame 11, and the two ends of the second elastic component 13 are respectively connected to the connecting frames 122 and the bottom frame 11.

[0069] See also Figure 1 As shown, two second elastic components 13 can be arranged on the bottom frame 11, and the two second elastic components 13 are arranged on both sides of the bottom frame 11. The size and model of the two second elastic components 13 are exactly the same. The two second elastic components 13 are symmetrically arranged on the bow head assembly 1. The arrangement of the two second elastic components 13 can play a role in stably supporting the top frame 12 and the carbon slide 14, and prevent the carbon slide 14 from tilting and deforming. The connecting frame 122 can extend along the extension direction of the carbon slide 14, and the connecting frame 122 provides a connection position for the second elastic component 13. The second elastic component 13 is directly supported on the connecting frame 122 at both ends of the carbon slide 14. A structure suitable for connecting and cooperating with the second elastic component 13 can be arranged on the connecting frame 122. The second elastic component 13 and the connecting frame 122 are connected and matched, and the structural design is more reasonable.

[0070] In some possible implementations, see Figure 4As shown, the connecting frame 122 and the base frame 11 are both provided with a convex shaft 15, and the second elastic component 13 is a coil spring, and the two ends of the coil spring are respectively sleeved on the convex shaft 15 of the connecting frame 122 and the base frame 11. The convex shaft 15 has a limiting effect on the ends of the coil spring, so that the coil spring remains at the position where the convex shaft 15 is located. In the absence of external force, the convex shaft 15 on the connecting frame 122 and the base frame 11 can be coaxial.

[0071] When the second elastic component 13 of the present application is a coil spring, when the top frame 12 is displaced by a force in any direction on the horizontal plane, it can be subjected to the reverse elastic force of the coil spring to buffer the external force, thereby protecting the frame structure of the bow head assembly 1 and extending the service life of the bow head assembly 1.

[0072] In some possible implementations, a spiral groove is provided on the outer wall of the convex shaft 15, and the spiral strip of the spiral spring is embedded in the spiral groove. The spiral spring is threadedly connected to the convex shaft 15, and when the bottom frame 11 and the top frame 12 move relative to each other, the end of the spiral spring is firmly connected to the convex shaft 15 and will not be separated from the convex shaft 15. The connection structure of the spiral spring and the convex shaft 15 is simple and has good stability.

[0073] In some possible implementations, see Figure 2 As shown, positioning holes are provided on the connecting frame 122 and the base frame 11, and the end of the coil spring has a bending section 131, which extends along the length direction of the coil spring and is inserted into the corresponding positioning hole.

[0074] The bent section 131 at the end of the coil spring can extend along the length direction of the coil spring, and the depth direction of the positioning holes on the connecting frame 122 and the bottom frame 11 is parallel to the length direction of the convex shaft 15, and the bent section 131 is inserted into the positioning hole. The positioning hole restricts the end of the coil spring to prevent the end of the coil spring from rotating, causing the coil spring to separate from the convex shaft 15.

[0075] In some possible implementations, see Figure 4 As shown, the convex shaft 15 is detachably connected to the base frame 11 or the connecting frame 122, the convex shaft 15 is connected with a stud, the stud passes through the base frame 11 or the connecting frame 122, the nut 16 is threadedly connected to the stud, and the nut 16 and the convex shaft 15 are respectively limited to the two sides of the base frame 11 or the connecting frame 122. The convex shaft 15 and the bolt can be integrally formed, and a through groove is set on the base frame 11 and the connecting frame 122, and the stud passes through the through groove.

[0076] In some possible implementations, see Figure 4As shown, the carbon slide plate 14 includes a main body 141 and a convex strip 142 arranged at the bottom of the main body 141, and a gap is provided between the end of the convex strip 142 and the end of the main body 141, and a step groove is formed between the end of the convex strip 142 and the end of the main body 141, and the end of the convex strip 142 is fixed to the connecting frame 122, and a cavity 17 is formed between the step groove and the connecting frame 122, and the nut 16 is accommodated in the cavity 17.

[0077] See also Figure 2 and Figure 3 As shown, the connecting frame 122 may include a bottom plate 12211 and side plates 12212 located on both sides of the bottom plate 12211, the end of the protrusion 142 is embedded between the two side plates 12212, the main body 141 covers the top of the two side plates 12212, and a cavity 17 is formed between the main body 141 and the bottom plate 12211. The nut 16 is accommodated in the cavity 17. The nut 16 is not exposed and does not contact the external structure, so as to avoid detachment from the stud under the action of the external structure.

[0078] In some possible implementations, see Figure 1 As shown, the base frame 11 includes a bottom beam 111 and two side beams 112, the two side beams 112 are respectively movably connected to the two sides of the bottom beam 111, the side beams 112 and the inclined guide plate 121 are movably connected, and the second elastic component 13 is arranged between the bottom beam 111 and the connecting frame 122.

[0079] In some possible implementation schemes, the inclined guide plate 121 and the connecting frame 122 are rotatably connected, the inclined guide plate 121 and the side beam 112 are rotatably connected, and the side beam 112 and the bottom beam 111 are rotatably connected, wherein the rotation axis of the inclined guide plate 121 and the rotation axis of the side beam 112 are parallel and perpendicular to the length direction of the second elastic component 13, and the rotation axis of the inclined guide plate 121 and the rotation axis of the side beam 112 can be perpendicular to the length direction (main deformation direction) of the second elastic component 13, so that the second elastic component 13 can play an effective buffering role in the process of deformation of the bow head assembly 1 caused by relative rotation of the various structural components of the bow head assembly 1.

[0080] The embodiment of the present application also provides a pantograph, including: the above-mentioned pantograph head assembly.

[0081] Embodiment 3

[0082] See also Figures 6 to 9As shown, the embodiment of the present application provides a pantograph adapter shaft assembly 4, including: a middle sleeve 42, a stiffness reinforcement 44, two side sleeves 43 and an integrally formed shaft body 41, the middle sleeve 42 is sleeved on the shaft body 41, and the middle sleeve 42 and the shaft body 41 are fixedly connected, the two side sleeves 43 can be rotatably sleeved on the shaft body 41, and the two side sleeves 43 are respectively arranged on both sides of the middle sleeve 42, the side sleeve 43 is used to connect the upper arm 5, the shaft body 41 passes through the side sleeves 43, and the stiffness reinforcement 44 is respectively connected to the middle sleeve 42 and the two ends of the shaft body.

[0083] The embodiment of the present application provides a transfer shaft assembly 4 having an integrally formed shaft body 41, rather than being composed of multiple single shafts. The transfer shaft assembly 4 has good integrity, enhances structural strength, reduces the number of structural parts of the transfer shaft assembly 4, and simplifies the structure. The embodiment of the present application provides a stiffness reinforcement member 44, which is connected to the two cantilever ends of the shaft body 41, plays a supporting role, strengthens the stiffness stability of the cantilever end of the shaft body, and reduces the shaking of the end of the shaft body.

[0084] In some possible implementations, the pantograph adapter shaft assembly 4 includes a fastener 45, the middle sleeve 42 has a middle slot 421 and outer expansion slots 422 located at both ends of the middle slot 421, the inner diameter of the outer expansion slot 422 is larger than the inner diameter of the middle slot 421, the shaft body 41 passes through the middle slot 421 and the outer expansion slot 422, the fastener 45 is located in one of the outer expansion slots 422, and the fastener 45 fixes the shaft body 41 and the middle sleeve 42. The fastener 45 is located in the outer expansion slot 422, and will not interfere with the side sleeves 43 on both sides, and will not affect the assembly of the side sleeves 43.

[0085] In some possible implementations, a step surface 423 is formed between the outer expansion groove 422 and the middle groove 421, the shaft body has an outer flange 411, the outer flange 411 is accommodated in the outer expansion groove 422, the outer expansion groove 422 has an internal thread, the fastener 45 is sleeved on the shaft body, the fastener 45 has an external thread, the fastener 45 is threadedly connected to the outer expansion groove 422, and the fastener 45 abuts against the outer flange 411, so that the outer flange 411 abuts against the step surface 423. The outer flange 411 is clamped between the step surface 423 and the fastener 45, so that there is a large friction force between the shaft body 41 and the middle sleeve 42, so that the middle sleeve 42 is fixed to the shaft body 41, and the middle sleeve 42 does not rotate around the shaft body 41.

[0086] In some possible implementations, see Fig. 9As shown, the outer peripheral annular surface of the fastener 45 includes a cylindrical surface and a conical surface 451, the cylindrical surface is connected to the large end of the conical surface 451, and the fastener 45 is located on one side of the small end of the conical surface 451 and abuts against the outer flange 411. The conical surface 451 is provided at one end of the fastener 45, and the end cross section of the conical surface 451 is small, which can be easily inserted into the notch of the external expansion groove 422, reducing the difficulty of assembly.

[0087] In some possible implementations, the pantograph adapter shaft assembly 4 includes a first fastening fitting 46, which has a first cylinder 461 and a first flange 462 located on an opening at one end of the first cylinder 461, the first cylinder 461 is sleeved on the shaft body 41, the first cylinder 461 is tightly fitted between the shaft body 41 and the inner wall of the middle groove 421, and the first flange 462 is pressed between the step surface 423 and the outer flange 411. The first fastening fitting 46 is located in the gap between the shaft body 41 and the middle sleeve 42, filling the gap, which is conducive to the tight fit of the fastener 45, the shaft body 41 and the middle sleeve 42.

[0088] In some possible implementation schemes, a fixing component is disposed in the outer expansion groove 422 at one end of the middle sleeve 42 away from the outer flange 411 to fix the middle sleeve 42 and the shaft body 41 .

[0089] In some possible implementations, the inner wall of the outer expansion groove 422 is provided with an annular groove 4221, and the fixing assembly includes a second fastening fitting 47, a retaining spring 48 and a circular ring 49. The second fastening fitting 47 has a second cylinder and a second flange located on an opening at one end of the second cylinder. The second cylinder is sleeved on the shaft body, and the second cylinder is tightly fitted between the shaft body and the inner wall of the middle groove 421. The second flange is fitted on the step surface 423 in the corresponding outer expansion groove 422. The retaining spring 48 is inserted into the annular groove 4221, and the circular ring 49 is tightly fitted between the retaining spring 48 and the second flange. The second fastening fitting 47 is limited by the retaining spring 48 and the circular ring 49. The second fastening fitting 47 also fills the gap between the shaft body 41 and the middle sleeve 42, increases the relative movement resistance between the middle sleeve 42 and the shaft body 41, and plays a role in assisting the fixing of the shaft body 41 and the middle sleeve 42.

[0090] In some possible implementation schemes, bearings 410 are provided at both ends of the side sleeve 43 , and each of the bearings 410 is sleeved on the shaft body 41 . The provision of the bearings 410 reduces the rotational resistance of the side sleeve 43 .

[0091] In some possible implementations, the stiffness reinforcement member 44 includes a main shaft 441 and vertical extension bodies 442 disposed at both ends of the main shaft 441 , the middle of the main shaft 441 is connected to the middle sleeve 42 , and the two vertical extension bodies 442 are respectively connected to both ends of the shaft body 41 .

[0092] See also Figure 6 As shown, the present application also provides a pantograph, comprising: a base 2, a lower arm 3, the above-mentioned adapter shaft assembly 4 and two upper arms 5. One end of the lower arm 3 is hinged to the base 2, the middle sleeve 42 of the adapter shaft assembly 4 is connected to the other end of the lower arm 3, the two upper arms 5 are respectively connected to the two side sleeves 43 of the adapter shaft assembly 4, and the upper arms 5 are connected to the bow head assembly 1. It should be noted that the bow head assembly 1 can also adopt the bow head assembly 1 provided in other embodiments of the application.

[0093] The pantograph's adapter shaft assembly 4 has an integrally formed shaft body 41, rather than being composed of multiple single shafts. The adapter shaft assembly 4 has good integrity, which enhances the structural strength, reduces the number of structural parts of the adapter shaft assembly 4, and simplifies the structure. The pantograph's adapter shaft assembly 4 is provided with a rigidity reinforcement member 44, which is connected to the two cantilever ends of the shaft body 41, plays a supporting role, strengthens the rigidity stability of the cantilever end of the shaft body 41, reduces the shaking of the end of the shaft body 41, significantly improves the quality of the pantograph, and prolongs the life of the pantograph.

[0094] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A bow head assembly, characterized in that: include: A base frame, the base frame being used to connect an upper arm of the pantograph; A top frame, the top frame includes a carbon slide, two inclined guide plates and two connecting frames, the two connecting frames are respectively fixed to the two ends of the carbon slide, the two connecting frames can be movably connected to the corresponding inclined guide plates, the connecting frames and the inclined guide plates can move relative to each other along the width direction of the carbon slide, and the inclined guide plates are connected to the bottom frame; A first elastic component is disposed between the connecting frame and the inclined guide plate, and deforms during the relative movement of the connecting frame and the inclined guide plate.

2. The bow head assembly according to claim 1, characterized in that: The connecting frame comprises a carbon plate connecting portion and a guide plate connecting portion, wherein the carbon plate connecting portion is fixedly connected to the carbon slide plate, and the guide plate connecting portion comprises two support arms, wherein the end of the inclined guide plate is located between the two support arms, and the spacing between the two support arms is greater than the width of the inclined guide plate, so as to limit the movement of the inclined guide plate between the two support arms; The first elastic component is disposed between the support arm and the inclined guide plate.

3. The bow head assembly according to claim 2, characterized in that: The inclined guide plate is provided with first elastic components on both sides along the width direction, and two ends of the first elastic components abut against the inclined guide plate and the corresponding support arms respectively.

4. The bow head assembly according to claim 3, characterized in that: The inclined guide plate is provided with barrel grooves on both sides along the width direction; One end of the first elastic component is accommodated in the barrel groove.

5. The bow head assembly according to claim 4, characterized in that: The support arm is provided with a cylinder shell, and the cylinder shell is sleeved on the outside of the first elastic component; The barrel shell is slidably connected to the barrel groove; One end of the first elastic component is accommodated in the cylindrical shell.

6. The bow head assembly according to claim 5, characterized in that: The cylinder shell comprises a straight cylinder and an end wall closing an opening on one side of the straight cylinder; One end of the connecting piece passes through the supporting arm and is threadedly connected to the end wall, and the other end of the connecting piece is limited on the supporting arm; The first elastic component abuts against the end wall.

7. The bow head assembly according to claim 3, characterized in that: Two ends of the first elastic component are respectively connected to the support arm and the inclined guide plate; When the inclined guide plate rotates relative to the connecting frame, one end of the first elastic component and the inclined guide plate rotate synchronously, and the other end of the first elastic component and the support arm are fixed in position.

8. The bow head assembly according to claim 1, characterized in that: including a second elastic member; The chassis comprises a bottom beam and two side beams, wherein the two side beams are movably connected to two sides of the bottom beam respectively; The side beam and the inclined guide plate are hinged; Two ends of the second elastic component are respectively connected to the connecting frame and the bottom beam.

9. The bow head assembly according to claim 8, characterized in that: including a third elastic member; The bottom beam and the side beam can move relative to each other along the width direction of the carbon slide plate; The third elastic component is disposed between the bottom beam and the side beam, and the third elastic component can be deformed during the relative movement of the bottom beam and the side beam.

10. A pantograph, characterized in that: include: The bow head assembly according to any one of claims 1 to 9.

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