Pushing mechanism of gantry shear

Abstract

The utility model discloses a material pushing mechanism of gantry shears, which comprises a material box, a material pushing head and chains positioned on two sides of the material box, the material pushing head is positioned in the material box, and the material pushing head can move relative to a bottom plate of the material box; the two ends of the force transmission arm are connected with the chains on the two sides respectively; the force transmission arm is connected with the material pushing head, and the connecting portion of the material pushing head and the force transmission arm is located in the middle of the material pushing head in the horizontal direction. Compared with the prior art, abnormal abrasion between the material pushing head and the side wall of the material box can be remarkably reduced, the feeding efficiency is improved, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of pushing mechanism of gantry shears, belong to gantry shears technical field. BACKGROUND

[0002] The Chinese utility model patent with the publication number CN213646095U discloses a kind of anti-stuck material slotless high-reliability pushing box for gantry shears, as shown in it, the chain transmission structure of its pushing mechanism is arranged with chain 3 at the both sides of material box 1, each extension is connected with chain 3 with the both sides of the upper part of pushing head 2 in material box 1 one connecting block 12, connecting block 12 is arranged across the side wall 1.2 of material box 1, chain 3 drives pushing head 2 to carry out reciprocating motion under the drive of motor, pushing head 2 pushes the material to be cut into between fixed knife and moving knife of gantry shears and cuts. Figure 1 However, the above-mentioned pushing mechanism has the following problems in actual use: since the pushing head 2 is driven by the chains 3 on both sides, it is often difficult to achieve complete synchronization, such as different load stress point positions, different tensioning degrees of the chains 3 on both sides, different clearances between the chain links and sprocket teeth, and different wear degrees of the chains 3, which can cause the chains 3 on both sides to be out of synchronization during transmission. Since the driving force of the chains 3 is directly applied to the two ends of the pushing head 2 in the horizontal direction, the out-of-synchronization movement of the chains 3 on both sides will cause the driving forces applied to the two sides of the pushing head 2 to be unequal, and the forces applied to the two sides of the pushing head 2 will generate a certain torque, causing the pushing head 2 to deflect relative to the material box 1, and ultimately causing abnormal wear between the pushing head 2 and the side wall 1.2 of the material box 1, and even causing the pushing head 2 to jam and other faults.

[0003] In addition, there is a frictional force between the pushing head 2 and the bottom plate 1.1 of the material box 1 during reciprocating movement, and the reaction force of the material on the pushing head 2 is also usually concentrated near the middle of the vertical direction of the pushing head 2. Since the connecting block 12 is connected to the upper edge of the pushing head 2, in some special cases, the pushing head 2 is prone to "nodding" inclination when the chain 3 drives the pushing head 2 to move forward to push the material, and prone to "tilting" inclination when the chain 3 drives the pushing head 2 to move backward, which will cause additional consumption of the pushing force of the chain 3.

[0004] UTILITY MODEL CONTENTS In order to overcome the problems in the prior art, the utility model provides a pushing mechanism for gantry shears, which can reduce abnormal wear between the pushing head and the side wall of the material box, and the specific technical solutions are as follows.

[0005]

[0006] ​A pushing mechanism of a gantry shear comprises a material box, a pushing head and chains located on both sides of the material box, the pushing head is located in the material box and can move relative to the bottom plate of the material box;

[0007] The pushing mechanism further comprises a force transmission arm, two ends of the force transmission arm are connected with the chains on both sides respectively, the force transmission arm is connected with the pushing head, and a connection position of the pushing head and the force transmission arm is located in the middle part of the pushing head in the horizontal direction.

[0008] By adopting the technical scheme, compared with the prior art, the force transmission arm is additionally arranged, the connection position of the pushing head and the force transmission arm is located in the middle part of the pushing head in the horizontal direction, and the driving force of the chains on both sides is transmitted to the middle part of the pushing head (the middle part between the two side walls of the material box) through the force transmission arm, so that even if the chains on both sides are slightly out of synchronization, the torque applied to the pushing head is small, and the pushing head will not swing relative to the material box to a large extent, thereby effectively reducing the abnormal wear between the pushing head and the side walls of the material box.

[0009] Further, the distance from the connection position of the pushing head and the force transmission arm to the bottom plate of the material box is 1 / 5-3 / 4 of the height of the pushing head, that is, the connection position of the pushing head and the force transmission arm is located in the middle part or the lower middle part or the upper middle part of the pushing head in the vertical direction, thereby avoiding the problem that the driving force of the chains is directly applied to the upper edge of the pushing head in the prior art, and the driving force of the chains on both sides is transmitted to the middle part or the range near the middle part of the pushing head in the height direction, so that the pushing head is not easy to tilt when reciprocating.

[0010] Further, the force transmission arm is movably connected with the pushing head, so that the force transmission arm will not transmit its own swing (irregular motion) to the pushing head, and the stable operation of the pushing head is ensured. Preferably, the force transmission arm can swing in a plane parallel to the bottom plate relative to the pushing head, and the advantage of this arrangement is that the force transmission arm will not transmit its own swing (also referred to as left-right swing) in the plane parallel to the bottom plate to the pushing head. Further preferably, the force transmission arm can swing in a central vertical plane relative to the pushing head (it can be considered that the force transmission arm can swing relative to the pushing head about an axis perpendicular to the central vertical plane, also referred to as front-back swing), and the central vertical plane refers to a plane passing through the center line of the material box and parallel to the vertical direction, and the advantage of this arrangement is that the force transmission arm will not transmit its own swing (the force transmission arm tilts to nod or to tilt back) in the central vertical plane to the pushing head, which is beneficial to avoid the phenomenon that the pushing head nods or tilts back.

[0011] Further, a transmission shaft and a driving mechanism are further included, both ends of the transmission shaft are provided with driving sprockets, and the chains on both sides are respectively in transmission cooperation with the driving sprockets at both ends; the driving mechanism is used for driving the transmission shaft to rotate.

[0012] Further, the transmission arm has a vertically extending pin shaft, the middle part of the pushing head has a sleeve corresponding to the pin shaft, and the pin shaft is inserted into the sleeve. Preferably, the diameter of the pin shaft is smaller than the inner diameter of the sleeve. In this way, the movable connection of the transmission arm and the pushing head can be realized, the transmission arm can swing flexibly in the plane parallel to the bottom plate relative to the pushing head, and the connection part of the transmission arm and the pushing head is located in the middle part in the horizontal direction and the middle part in the height direction (vertical direction) of the pushing head.

[0013] Further, the transmission arm and the pushing head both have horizontally arranged ear plates, and a bolt penetrates through the ear plates of the transmission arm and the ear plates of the pushing head. Preferably, the diameter of the bolt is smaller than the diameter of the through hole. In this way, the movable connection of the transmission arm and the pushing head can be realized, the transmission arm can swing flexibly in the plane parallel to the bottom plate relative to the pushing head, and the connection part of the transmission arm and the pushing head is located in the middle part in the horizontal direction and the middle part in the height direction (vertical direction) of the pushing head.

[0014] Further, the pushing head has a semispherical groove, the pushing head is provided with a limiting plate, the transmission arm has a push rod penetrating through the through hole of the limiting plate, the front end of the push rod is semispherical, the front end of the push rod is limited between the semispherical groove and the limiting plate, and the diameter of the push rod is smaller than the diameter of the through hole. In this way, the movable connection of the transmission arm and the pushing head can be realized, the transmission arm can swing flexibly in the plane parallel to the bottom plate relative to the pushing head.

[0015] Further, the transmission arm has a push rod, the front end of the push rod is spherical, the pushing head is provided with a mounting seat, the front end of the push rod is accommodated in the mounting seat, and the push rod can swing relative to the mounting seat. In this way, the movable connection of the transmission arm and the pushing head can be realized, the transmission arm can swing flexibly in the plane parallel to the bottom plate relative to the pushing head.

[0016] Compared with the prior art, the pushing head and the side wall of the material box can be significantly reduced, the occurrence of the nodding and tilting of the pushing head can be reduced, the feeding efficiency can be improved, and the maintenance cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of a pushing mechanism in the prior art;

[0018] Figure 2 is the stereogram of the pushing mechanism of the embodiment 1 of the utility model, and

[0019] Figure 3 is the stereogram (another perspective view) of the pushing mechanism of the embodiment 1 of the utility model, and

[0020] Figure 4 is the plan view of the pushing mechanism of the embodiment 1 of the utility model, and

[0021] Figure 5 is the connection schematic diagram of the pushing head and the force transmission arm of the embodiment 1 of the utility model, and

[0022] Figure 6 is the connection schematic diagram of the pushing head and the force transmission arm of the embodiment 2 of the utility model, and

[0023] Figure 7 is the connection schematic diagram of the pushing head and the force transmission arm of the embodiment 3 of the utility model, and

[0024] Figure 8 is the connection schematic diagram of the pushing head and the force transmission arm of the embodiment 4 of the utility model.

[0025] In the drawing: material box 1, bottom plate 1.1, side wall 1.2, pushing head 2, sleeve 2.1, mounting seat 2.2, semispherical groove 2.3, chain 3, force transmission arm 4, pin shaft 4.1, push rod 4.2, transmission shaft 5, driving mechanism 6, driving sprocket 7, ear plate 8, bolt 9, limiting plate 10, through hole 10.1, driven sprocket 11, center line A, connecting block 12. DETAILED DESCRIPTION

[0026] The utility model will be described further in detail in combination with the drawings.

[0027] Embodiment 1

[0028] Referring to Figures 2-5The pushing mechanism of the gantry shear comprises a material box 1, a pushing head 2 and chains 3 located on both sides of the material box 1, the pushing head 2 is located in the material box 1, and the pushing head 2 can move relative to the bottom plate 1.1 of the material box 1; further comprising a force transmission arm 4, both ends of the force transmission arm 4 are connected with the chains 3 on both sides respectively; the force transmission arm 4 is movably connected with the pushing head 2, and the force transmission arm 4 can swing in a plane parallel to the bottom plate 1.1 relative to the pushing head 2; the connecting part of the pushing head 2 and the force transmission arm 4 is located in the middle of the pushing head 2 in the horizontal direction (i.e. the middle between the two side walls of the material box). In order to synchronously drive the chains 3 on both sides, the pushing mechanism further comprises a transmission shaft 5 and a driving mechanism 6, both ends of the transmission shaft 5 are provided with driving sprockets 7, the chains 3 on both sides are in transmission cooperation with the driving sprockets 7 at both ends respectively, and of course the chains 3 are also provided with driven sprockets 11; the driving mechanism 6 is used for driving the transmission shaft 5 to rotate, the transmission shaft 5 drives the driving sprockets 7 to rotate, the driving sprockets 7 drive the force transmission arm 4 to make reciprocating motion, the force transmission arm 4 drives the pushing head 2 to make reciprocating motion in the material box 1, thereby realizing the material pushing function.

[0029] The center vertical plane refers to a plane passing through the center line A of the material box and parallel to the vertical direction, the pushing head 2 and the force transmission arm 4 are generally symmetrical about the center vertical plane; the material box 1 comprises a bottom plate 1.1 and side walls 1.2 on both sides of the bottom plate 1.1, the pushing head 2 moves in the space surrounded by the bottom plate 1.1 and the side walls 1.2 to realize the function of pushing the material; the chains 3 are located outside the side walls 1.2 of the material box 1, so that the material (not shown) in the material box 1 can prevent the chains 3 from running; the chains 3 can drive the force transmission arm 4 to make reciprocating motion along the material box 1 when running, and the force transmission arm 4 drives the pushing head 2 to make reciprocating motion along the material box 1.

[0030] The movable connection scheme of the force transmission arm 4 and the pushing head 2 is that the force transmission arm 4 has a vertically extending pin shaft 4.1, the middle part of the pushing head 2 has a sleeve 2.1 corresponding to the pin shaft 4.1, and the pin shaft 4.1 is inserted into the sleeve 2.1. In this way, the movable connection of the force transmission arm 4 and the pushing head 2 can be realized, and the force transmission arm 4 can swing in a plane parallel to the bottom plate 1.1 relative to the pushing head 2; and the connecting part of the force transmission arm 4 and the pushing head 2 is located in the middle of the pushing head 2 in the horizontal direction, so as to ensure that the middle part of the pushing head 2 is stressed and reduce the friction between the pushing head 2 and the side walls 1.2.

[0031] The embodiment 1 adds the force transmission arm 4, and the pushing head 2 is movably connected with the force transmission arm 4, so that even if the chains 3 on both sides are slightly out of synchronization, causing the force transmission arm 4 to tilt relative to the material box 1, the pushing head 2 will not swing greatly relative to the material box 1, thereby effectively reducing the abnormal wear between the pushing head 2 and the side walls of the material box 1. The problem of uneven stress on both ends of the pushing head in the prior art is avoided.

[0032] Preferably, the distance from the connecting position of the pushing head 2 and the force transmission arm 4 to the bottom plate 1.1 of the material box 1 is 1 / 5-3 / 4 of the height of the pushing head 2. That is, the connecting position of the pushing head 2 and the force transmission arm 4 is located in the middle or lower or upper of the vertical direction of the pushing head 2, and the driving force of the two side chains 3 is transmitted to the middle or the vicinity of the middle of the height direction of the pushing head 2 through the force transmission arm 4, so that the pushing head 2 is not easy to tilt when reciprocating. In example 1, the connecting position of the pushing head 2 and the force transmission arm 4 can be considered as the position of the sleeve 2.1.

[0033] Further preferably, the diameter of the pin shaft 4.1 is smaller than the inner diameter of the sleeve 2.1, so that the force transmission arm 4 can swing in the central vertical plane relative to the pushing head 2 (which can be considered that the force transmission arm 4 can swing relative to the pushing head 2 around an axis perpendicular to the central vertical plane). That is, the force transmission arm 4 has a degree of freedom in the plane parallel to the bottom plate 1.1 (horizontal plane) relative to the pushing head 2, and the force transmission arm 4 also has a degree of freedom in the central vertical plane relative to the pushing head 2. The advantage of this arrangement is that the force transmission arm 4 will not transmit its swing in the plane parallel to the bottom plate (also called left-right swing) to the pushing head; the force transmission arm 4 will not transmit its swing in the central vertical plane (the force transmission arm appears to tilt its head) to the pushing head, which is beneficial to avoid the phenomenon of the pushing head tilting its head.

[0034] It should be noted that the connecting position of the pushing head 2 and the force transmission arm 4 is located in the middle of the horizontal direction (vertical direction) of the pushing head 2, which does not mean that the connecting position is located in the interior of the pushing head 2, but in the top view, the connecting position is located in the middle of the two side walls 1.2 of the material box 1, and in the view along the central line A direction, the connecting position is located in the middle of the two side walls 1.2 of the material box 1 and the middle of the height direction of the pushing head 2.

[0035] Example 2

[0036] As shown in Figure 6 , the difference between example 2 and example 1 is that the connection scheme of the force transmission arm 4 and the pushing head 2 is different. In example 2, the force transmission arm 4 and the pushing head 2 both have horizontally arranged ear plates 8, and the latch 9 penetrates the ear plates 8 of the force transmission arm 4 and the ear plates 8 of the pushing head 2 at the same time; this structure is relatively simple and easy to assemble. Preferably, the diameter of the latch 9 is smaller than the hole of the ear plate 8 (not shown), so that the force transmission arm 4 also has a degree of freedom in the central vertical plane relative to the pushing head 2. In example 2, the connecting position of the pushing head 2 and the force transmission arm 4 can be considered as the position of the ear plate 8 of the pushing head 2.

[0037] Example 3

[0038] As shown in Figure 7As shown, the difference between Embodiment 3 and Embodiment 1 lies in the different movable connection schemes between the force transmission arm 4 and the pusher head 2. In Embodiment 3, the pusher head 2 has a hemispherical groove 2.2, and a limiting plate 10 is provided on the pusher head 2; the force transmission arm 4 has a push rod 4.2 that passes through a through hole 10.1 through the limiting plate 10, the front end of the push rod 4.2 is hemispherical, and the front end of the push rod 4.2 is limited between the hemispherical groove 2.2 and the limiting plate 10; the diameter of the push rod 4.2 is smaller than the diameter of the through hole 10.1. This method can realize the movable connection between the force transmission arm 4 and the pusher head 2, and the force transmission arm 4 can swing relative to the pusher head 2. The push rod 4.2 is preferably horizontally set, but those skilled in the art will understand that the push rod 4.2 can also have a certain tilt angle relative to the horizontal direction. The limiting plate 10 and the pusher head 2 can be fixed by bolts (not shown) for easy assembly. Setting the front end of the push rod 4.2 as hemispherical is beneficial to improving durability. In Example 3, the connection between the pusher head 2 and the force transmission arm 4 can be considered as the center of the hemispherical groove 2.2.

[0039] Example 4

[0040] like Figure 8 As shown, the difference between Embodiment 4 and Embodiment 3 lies in the different movable connection schemes between the force transmission arm 4 and the pusher head 2. In Embodiment 4, the force transmission arm 4 has a push rod 4.2, the front end of which is spherical; the pusher head 2 is provided with a mounting base 2.2, and the front end of the push rod 4.2 is accommodated within the mounting base 2.2, allowing the push rod 4.2 to swing relative to the mounting base 2.2. This method enables the movable connection between the force transmission arm 4 and the pusher head 2, allowing the force transmission arm 4 to swing relative to the pusher head 2. Preferably, the push rod 4.2 is horizontally positioned, but those skilled in the art will understand that the push rod 4.2 can also have a certain tilt angle relative to the horizontal direction. The mounting base 2.2 can adopt a split assembly structure and can be fixed to the pusher head 2 with bolts (not shown) for easy assembly. Setting the front end of the push rod 4.2 as spherical improves durability. In Embodiment 4, the connection point between the pusher head 2 and the force transmission arm 4 can be considered as the location of the spherical center of the front end of the push rod 4.2.

[0041] It should be noted that in the above embodiments, the movable connection between the force transmission arm 4 and the pusher head 2 is to enable the force transmission arm 4 to swing horizontally and vertically relative to the pusher head 2. Furthermore, the force transmission arm 4 can both push and pull the pusher head 2, thereby achieving the reciprocating motion of the pusher head 2. In the above embodiments, the described vertical and horizontal directions are not absolute; they only need to be approximately vertical and horizontal.

[0042] Example 5

[0043] The embodiment 5 is different from the embodiment 1 in that the force transmission arm 4 is fixedly connected with the pushing head 2 (not shown in the figure), the fixed connection is relative to the movable connection, and the fixed connection can be realized in the form of a conventional fastener such as a bolt; and the connecting position of the pushing head 2 and the force transmission arm 4 is located at the middle part of the pushing head 2 in the horizontal direction; preferably, the connecting position of the pushing head 2 and the force transmission arm 4 is located at the middle part of the pushing head 2 in the vertical direction.

[0044] The embodiments of the utility model and the features in the embodiments can be combined with each other without conflict, and the utility model is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative but not limited, and a person skilled in the art can make many forms under the inspiration of the utility model without departing from the purpose of the utility model and the scope protected by the claims, which all belong to the protection scope of the utility model.

Claims

1. A pushing mechanism of a gantry shear, comprising a material box (1), a pushing head (2) and chains (3) on both sides of the material box (1), the pushing head (2) being located in the material box (1) and being movable relative to a bottom plate (1.1) of the material box (1); further comprising a force transmission arm (4), both ends of the force transmission arm (4) being connected with the chains (3) on both sides respectively, the force transmission arm (4) being connected with the pushing head (2), and a connecting part of the pushing head (2) with the force transmission arm (4) being located in a middle part of the pushing head (2) in a horizontal direction. characterized in that The distance from the connecting part of the pushing head (2) with the force transmission arm (4) to the bottom plate (1.1) of the material box (1) is 1 / 5-3 / 4 of the height of the pushing head (2).

2. A pusher mechanism for a portal shear as defined in claim 1 wherein, The force transmission arm (4) is movably connected with the pushing head (2).

3. A pusher mechanism for a portal shear according to claim 1 or 2, wherein, The force transmission arm (4) can swing in a plane parallel to the bottom plate (1.1) relative to the pushing head (2).

4. A pusher mechanism for a portal shear as defined in claim 3 wherein, The force transmission arm (4) can swing in a central vertical plane relative to the pushing head (2), the central vertical plane being a plane passing through the center line of the material box and parallel to the vertical direction.

5. A pusher mechanism for a portal shear as defined in claim 4 wherein, The force transmission arm (4) has a vertically extending pin shaft (4.1), and the middle part of the pushing head (2) has a sleeve (2.1) corresponding to the pin shaft (4.1), the pin shaft (4.1) being inserted into the sleeve (2.1).

6. A pusher mechanism for a portal shear according to claim 4 or 5 wherein, The diameter of the pin shaft (4.1) is smaller than the inner diameter of the sleeve (2.1).

7. A pusher mechanism for a portal shear as defined in claim 6 wherein, Both the force transmission arm (4) and the pushing head (2) have horizontally arranged ear plates (8), and a bolt (9) penetrates the ear plates (8) of the force transmission arm (4) and the ear plates (8) of the pushing head (2) simultaneously.

8. A pusher mechanism for a portal shear according to claim 4 or 5 wherein, The pushing head (2) has a semispherical recess (2.3), and the pushing head (2) is provided with a limiting plate (10); the force transmission arm (4) has a push rod (4.2) penetrating a through hole (10.1) of the limiting plate (10), a front end of the push rod (4.2) being semispherical, the front end of the push rod (4.2) being limited between the semispherical recess (2.3) and the limiting plate (10), and the diameter of the push rod (4.2) being smaller than the diameter of the through hole (10.1).

9. A pusher mechanism for a portal shear according to claim 4 or 5 wherein, The force transmission arm (4) has a push rod (4.2), a front end of the push rod (4.2) being spherical; the pushing head (2) is provided with a mounting seat (2.2), the front end of the push rod (4.2) being accommodated in the mounting seat (2.2), and the push rod (4.2) can swing relative to the mounting seat (2.2).

10. A pusher mechanism for a portal shear according to claim 4 or 5 wherein, ​

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