Material stop device

Abstract

A material stopping device includes: a frame, and a stopping assembly and a releasing assembly assembled on the frame. The stopping assembly includes: a bracket mounted on the upper part of the frame via a transverse pivot, and including a rear end wall and a front end wall; a stop member including a body and a stop portion located above the body, the stop portion being configured to be pushed forward by longitudinally traveling material, the body being arranged to move back and forth between the rear end wall and the front end wall of the bracket; and at least two buffer cylinders arranged parallel to each other, passing through the stop member, and configured such that the cylinder body of each buffer cylinder can move forward with the stop member, and the stop member can move backward with the cylinder body of the buffer cylinder, the piston rod of each buffer cylinder pressing forward against the front end wall of the bracket, and the bracket providing guidance for the back and forth movement of the cylinder bodies of each buffer cylinder.

Description

Technical Field

[0001] This application relates to a material stop device used in a material conveyor line, which can improve its stopping and buffering capabilities. Background Technology

[0002] Material stopping devices are known in the field of material conveying. They are used to stop material at a stop position as it moves along the conveying path on a material conveying device, so as to perform a certain operation on the material. After the operation is completed, the material is released to continue moving along the conveying path.

[0003] An existing material stopping device includes a stopping assembly and a releasing assembly. The stopping assembly includes a stop for preventing material movement and a buffer cylinder acting on the stop to provide a cushioning effect. The middle part of the stop is pivotable about a pivot, the upper end of the stop forms a material stopping section, and the lower end pushes against the piston rod of the buffer cylinder. When encountering moving material, the upper end of the stop is pushed forward by the material and moves, forcing the stop to pivot about the pivot. The lower end of the stop pushes the piston rod to contract, thereby providing a cushioning force and stopping the material. After the material handling is completed, the releasing assembly of the material stopping device actuates to pull down the stop assembly, releasing the stop from obstructing the material and allowing the material to continue moving forward. In this existing material stopping device, the structure of the lower end of the stop pushing against the piston rod of the buffer cylinder provides limited cushioning capacity. Furthermore, eccentric loads are easily generated on the stop when the material pushes against it, and long-term operation under such eccentric loads may lead to leakage of the buffer cylinder. Summary of the Invention

[0004] The purpose of this application is to provide a material stopping device with stronger buffering capacity.

[0005] According to one aspect of this application, a material stopping device is provided, comprising: a frame, and a stopping assembly and a releasing assembly assembled on the frame; wherein the stopping assembly includes: a bracket mounted on the upper part of the frame via a transverse pivot, and including a rear end wall and a front end wall; a stop member including a body and a stop portion located above the body, the stop portion being configured to be pushed forward by longitudinally traveling material, the body being arranged to move back and forth between the rear end wall and the front end wall of the bracket; and at least two buffer cylinders arranged parallel to each other, passing through the stop member, and configured such that the cylinder body of each buffer cylinder can move forward with the stop member, and the stop member can move backward with the cylinder body of the buffer cylinder, the piston rod of each buffer cylinder pressing forward against the front end wall of the bracket, and the bracket providing guidance for the back and forth movement of the cylinder bodies of each buffer cylinder; the releasing assembly includes: a releasing mechanism and a linear actuation device for driving the releasing mechanism; the releasing mechanism is configured to cause the bracket to oscillate about the pivot.

[0006] In one embodiment, the cylinder body of each buffer cylinder is fixed in a corresponding sleeve, each sleeve passes longitudinally through the body of the stop member, and the front end of each sleeve is guided by a corresponding insertion hole formed in the front end wall of the bracket, and the rear end of each sleeve is guided by a corresponding guide through hole formed in the rear end wall of the bracket.

[0007] In one embodiment, each sleeve is provided with an annular flange, and the front surface of the main body of the stop abuts against the rear edge of the annular flange.

[0008] In one embodiment, each socket is equipped with a stop block, which is pushed by the front end of the piston rod of the corresponding buffer cylinder.

[0009] In one embodiment, a first guide sleeve for guiding the rear section of the sleeve is provided in each guide through hole; and a second guide sleeve for guiding the front end of the sleeve is provided in each insertion hole.

[0010] In one embodiment, the centerline of at least one of the buffer cylinders passes through a first transverse side portion of the body of the stop, and the centerline of at least another buffer cylinder passes through a second transverse side portion of the body of the stop.

[0011] In one embodiment, the stop further includes a top wall extending forward from the upper edge of the body, the stop portion being formed at the front end of the top wall and protruding upward, and in a state where the stop portion is not pushed forward by material, the rear surface of the body of the stop is adjacent to the front surface of the rear end wall of the bracket.

[0012] In one embodiment, the stop assembly further includes a check spring acting on a backflow preventer, which is pivotally disposed within a notch at the upper end of the rear end wall of the bracket.

[0013] In one embodiment, a recess is formed in the transition area between the upper edge of the main body of the stop member and the rear edge of the top wall. When the stop member is pushed forward by the material, the stop member swings downward and partially enters the recess.

[0014] In one embodiment, the release mechanism includes: a translation rod, a rocker arm, and a connecting rod; the translation rod is configured to be driven by the linear actuator to move back and forth relative to the frame, and a vertically extending elongated hole is formed in the translation rod; the lower end of the rocker arm is pivotally supported in the frame via a first pivot, the upper end of the rocker arm is pivotally connected to the lower end of the connecting rod via a second pivot, and the upper end of the connecting rod pivotally supports the front of the bracket via a third pivot, the second pivot being arranged in the elongated hole and movable up and down in the elongated hole.

[0015] In one embodiment, when the linear actuator is not activated, the translation rod is in a retracted position, wherein the longitudinal position of the centerline of the second pivot is rearward relative to the longitudinal positions of the centerlines of the first and third pivots.

[0016] In one embodiment, when the translation rod is in the retracted position, the longitudinal position of the centerline of the third pivot is rearward relative to the longitudinal position of the centerline of the first pivot.

[0017] The material stopping device according to this application employs two or more parallel-arranged buffer cylinders, with the cylinder body of each buffer cylinder moving in tandem with the stop member. This allows the stop member to provide a larger buffer load, improving the buffering capacity of the material stopping device. The material stopping device of this application does not require increasing the overall outer dimensions to improve buffering capacity, nor does it require a larger installation space in the material conveyor line than existing technologies. Furthermore, by using two or more buffer cylinders, the buffer load can be distributed, reducing the likelihood of eccentric loads and decreasing the possibility of oil leakage from the buffer cylinders due to prolonged eccentric loads. Attached Figure Description

[0018] The foregoing and other features, advantages and beneficial effects of this application can be fully and comprehensively understood from the following detailed description with reference to the accompanying drawings.

[0019] Figure 1 This is a perspective view of the material stop device according to this application.

[0020] Figure 2 This is a cross-sectional view of the material stopping device in the waiting state for material.

[0021] Figure 3 This is a partially enlarged cross-sectional view showing the stop component of the material stop device.

[0022] Figure 4 , Figure 5 These are perspective views of the frame of the material stopping device from different directions.

[0023] Figure 6 This is a perspective view of the bracket of the stop assembly.

[0024] Figure 7 This is a perspective view of the stop member of the stop assembly.

[0025] Figure 8 , Figure 9 These are, respectively, a perspective view and a cross-sectional view of the combination of the stopping component and the releasing component of the material stopping device.

[0026] Figure 10 This is a cross-sectional view of the material stopping device in the material stopping state.

[0027] Figure 11 This is a cross-sectional view of the material stopping device in the material release state.

[0028] Figure 12 This is a cross-sectional view of the material stopping device in the reset state. Detailed Implementation

[0029] A feasible embodiment of the material stop device for use in a material conveyor line of this application will now be described in detail with reference to the accompanying drawings.

[0030] Figure 1 , Figure 2 The diagram shows a material stop device in a waiting material state. The waiting material state refers to the state where material P (see...) Figure 2 ) is forward on the material conveyor line (not shown) Figure 2 The material is being conveyed from the center to the left and has not yet reached the material stop device. The material stop device includes a frame 10, and a stop assembly 20 and a release assembly 30 assembled on the frame 10.

[0031] In the description of the material stop device in this application, the terms "longitudinal" or "front-back" indicate the conveying direction of the material conveyor line, "lateral" or "left-right" indicates a direction that is approximately horizontal and perpendicular to the material conveyor line, and "vertical" or "up-down" indicates a direction that is approximately vertical and perpendicular to the material conveyor line.

[0032] See Figure 4 , Figure 5 The frame 10 is a frame structure, including a vertical wall 10a, a pair of side walls 10b, and a flat wall 10c that are integrated with each other. The vertical wall 10a extends perpendicular to the material travel direction (i.e., it extends both vertically and laterally). The flat wall 10c extends forward from the upper edge of the vertical wall 10a along the material travel direction. The pair of side walls 10b are fixed to the lateral edges of the flat wall 10c and the vertical wall 10a on both sides, thereby defining a stop assembly space 10d that opens upward and backward between the upper parts of the pair of side walls 10b, and a release mechanism space 10e that opens backward between the lower parts of the pair of side walls 10b. A longitudinally through hole 10f is formed in the vertical wall 10a.

[0033] See Figures 1-3 The stop assembly 20 includes: a bracket 21, which supports a pair of longitudinally sliding buffer cylinders 22 and a stop member 23, and a vertically swinging check member 24, which is also supported by the bracket 21. The pair of buffer cylinders 22 are arranged parallel to each other in the longitudinal direction, and their piston rods 22a point forward.

[0034] See Figure 6The bracket 21 includes a bottom wall 21a, and a rear end wall 21b and a front end wall 21c rising from the bottom wall 21a. The rear end wall 21b and the front end wall 21c are spaced apart longitudinally. A notch 21d is formed at the upper end of the rear end wall 21b for mounting a stop member 23. A pair of longitudinal guide holes 21e are formed in the rear end wall 21b. These two guide holes 21e are arranged as evenly and dispersed as possible in the rear end wall 21b, for example, as shown in the figure, one is formed in the upper left part of the rear end wall 21b and the other is formed in the lower right part of the rear end wall 21b. Alternatively, the two guide holes 21e can be arranged at the same height on both sides.

[0035] A pair of rearward-facing insertion holes 21f are formed in the front wall 21c. The center line of each insertion hole 21f is collinear with the center line of a corresponding guide hole 21e.

[0036] See Figure 7 The stop member 23 includes a vertical plate-shaped main body 23a, a top wall 23b extending forward from the upper edge of the main body 23a, and a stop portion 23c formed at the front end of the top wall 23b and protruding upward. The rearward-facing vertical surface of the stop portion 23c constitutes a material stop surface. For different material properties and conveying methods, corresponding stop features can be provided on the stop surface of the stop portion 23c to achieve the desired purpose. For example, an elastic rubber plate can be added to the stop surface of the stop portion 23c to buffer the impact of the material, and protrusions (especially pointed protrusions) can be formed to improve the stability of the material, etc.

[0037] A pair of longitudinal mounting through holes 23d are formed in the main body 23a. In the assembled state of the stop assembly 20, the center line of each mounting through hole 23d is collinear with the center line of a corresponding guide through hole 21e.

[0038] A recess 23e facing upward and rearward is formed at the transition area between the upper edge of the main body 23a and the rear edge of the top wall 23b.

[0039] And see Figures 1-9 The bracket 21 is arranged in the stop assembly space 10d of the frame 10. The rear ends of the bottom wall 21a of the bracket 21 are mounted to the corresponding side walls 10b of the frame 10 via transverse pivots 21g, allowing the bracket 21 (or the entire stop assembly 20) to swing up and down around the pivots 21g within the stop assembly space 10d of the frame 10. The pivots 21g are located above the flat wall 10c of the frame 10, and the bottom surfaces of the middle and rear portions of the bottom wall 21a of the bracket 21 are located a certain distance above the top surface of the flat wall 10c, ensuring the swing range of the bracket 21. The front portion of the bottom wall 21a extends to the front of the top edge of the vertical wall 10a of the frame 10.

[0040] The main body 23a of the stop member 23 is placed in the space between the rear end wall 21b and the front end wall 21c of the bracket 21. The cover plate 25 covers the upper end of the rear end wall 21b of the bracket 21 and the space between the rear end wall 21b and the front end wall 21c from above, leaving the backstop 24 and the stop portion 23c of the stop member 23 exposed from above the cover plate 25, so that they can be touched by the material P.

[0041] A stop block 26 is fixed to the bottom wall of each insertion hole 21f of the bracket 21. In the illustrated example, the front part of the stop block 26 is screwed into the mounting hole formed in the front end wall 21c of the bracket 21; of course, the stop block 26 can also be fixed in the insertion hole 21f in other ways. The stop block 26 is made of rigid material, and its rear end face is a partially spherical surface as shown in the illustration, or it can also be an arc surface, a plane, etc., and can be provided with vibration-absorbing features (such as adding an elastic rubber layer). The central part of the rear end face of the stop block 26 faces and engages with the front end of the piston rod 22a of the corresponding buffer cylinder 22.

[0042] The cylinder body of each buffer cylinder 22 is mounted in the mounting through hole 23d of the stop member 23 via a sleeve 27. The cylinder body of the buffer cylinder 22 is fixed inside the sleeve 27, which is inserted into the mounting through hole 23d of the stop member 23 (preferably fixed in the mounting through hole 23d). The front end of the sleeve 27 extends forward from the front end of the cylinder body of the buffer cylinder 22 and is inserted into the insertion hole 21f in the front wall 21c of the bracket 21, and can slide longitudinally in the insertion hole 21f. The rear end of the sleeve 27 extends to near the rear end of the cylinder body of the buffer cylinder 22. The sleeve 27 holds the cylinder body of the buffer cylinder 22 in the stop member 23, so that the cylinder body of the buffer cylinder 22 moves forward with the stop member 23. To ensure that the stop 23 moves forward along with the cylinder of the buffer cylinder 22, an annular flange 27a is formed on the sleeve 27, and the front surface of the main body 23a of the stop 23 abuts against the rear edge of the annular flange 27a. In this way, the stop 23 pushes the annular flange 27a forward, which drives the sleeve 27 to move forward along with the cylinder of the buffer cylinder 22, while the stop 23 moves backward along with the cylinder of the buffer cylinder 22. That is, the cylinder of the buffer cylinder 22 can drive the sleeve 27 backward, so that the sleeve 27 pushes the stop 23 backward via the annular flange 27a.

[0043] The rear section of sleeve 27, protruding from the rear surface of stop 23, passes through a corresponding guide hole 21e in the rear end wall 21b of bracket 21 and can slide longitudinally back and forth in the guide hole 21e. This allows the main body 23a of stop 23 to move back and forth within the space between the rear end wall 21b and the front end wall 21c of bracket 21. The front end of sleeve 27 is guided by the insertion hole 21f in the front end wall 21c, and the rear section of sleeve 27 is guided by the guide hole 21e in the rear end wall 21b. To improve guiding accuracy and reduce wear, a guide sleeve 28 can be provided in the guide hole 21e in the rear end wall 21b to guide the rear section of sleeve 27, and a guide sleeve 29 can be provided in the insertion hole 21f in the front end wall 21c to guide the front end of sleeve 27.

[0044] The check valve 24 is pivotally mounted within a notch 21d in the rear end wall 21b of the bracket 21 via lateral pivots 24a on both sides of the rear. A corresponding torsion spring 24b is arranged around each lateral pivot 24a. The coil of the torsion spring 24b is fitted onto the lateral pivot 24a, with one arm of the torsion spring 24b pressing against the bottom surface of the notch 21d and the other arm pressing against the front of the check valve 24. Thus, the torsion spring 24b pushes the check valve 24 in an upward swinging direction. In the open state (normal state) of the check valve 24, its front end is higher than its rear end.

[0045] While waiting for materials (see...) Figure 2 The piston rod 22a of the buffer cylinder 22 is pushed against the stop block 26 with a certain preload, which causes the cylinder body of the buffer cylinder 22 to be in its rearmost position due to the rearward push of the piston rod 22a. The rearmost position of the cylinder body of the buffer cylinder 22 (that is, the rearmost position of the stop member 23) is defined by the rear surface of the main body 23a of the stop member 23 pushing against the front surface of the rear end wall 21b of the bracket 21. The lower front part of the check valve 24 can be located in the recess 23e above the main body 23a. The front end of the sleeve 28 is separated from the bottom wall of the corresponding insertion hole 21f in the front end wall 21c of the bracket 21 by an axial distance.

[0046] After material P moves forward from the rear and encounters check valve 24, check valve 24 swings downward under the action of material P, causing it to be pressed down around the transverse pivot 24a, with the front part of check valve 24 being pressed into the recess 23e. Material P passes forward along the upper part of check valve 24. This type of check valve 24, which swings up and down via torsion spring 24b, has low rotational resistance when material P pushes it from the rear to the front, making it easy to press down.

[0047] As material P presses down on check valve 24 and advances further, the lower front end of material P pushes against the rear surface of stop portion 23c of stop valve 23, thereby causing stop valve 23 to move forward. Stop valve 23 pushes sleeve 27 forward, and sleeve 27 moves the cylinder bodies of each buffer cylinder 22 forward, causing piston rod 22a to retract into the cylinder body, that is, the length of piston rod 22a exposed in the cylinder body decreases. After the lower tail end of material P has just moved past check valve 24, the leading edge of the annular flange 27a of sleeve 27 pushes against the rear surface of the front wall 21c of bracket 21, so that sleeve 27, the cylinder body of buffer cylinder 22 and stop valve 23 cannot move further forward, thus limiting the foremost position of the cylinder body of buffer cylinder 22 (that is, the foremost position of stop valve 23). After the lower tail end of material P moves past the check piece 24, the check piece 24 swings upward under the action of the torsion spring 24b to reach the open state, so that the front end of the check piece 24 faces the lower tail end of material P, preventing the material from retreating.

[0048] As can be seen, when the material P pushes the stop part 23c of the stop member 23 forward, the stop member 23 and the cylinder bodies of each buffer cylinder 22 move linearly under guidance within the bracket 21. Furthermore, the cylinder bodies of the two buffer cylinders 22 provide high-precision guidance, allowing the stop member 23 to move smoothly forward. The rear surface of the stop part 23c, i.e., the stop surface, maintains the same vertical posture during the movement of the stop member 23, stably conforming to the material P. Compared to some existing pivot-type stop members, the stop member 23, which moves linearly with precise guidance, can more stably stop the material P.

[0049] At this point, material P is stopped moving longitudinally and is in a material stop state (see...). Figure 10 The lower part of the material P is longitudinally clamped between the stop 23 and the check 24, and the clamping force is jointly provided by the piston rod 22a of each buffer cylinder 22.

[0050] In the material stop state, material P can undergo the expected operation. After the operation is completed, the release component 30 swings the stop component 20 around the pivot 21g and pulls it down, causing the stop portion 23c of the stop member 23 to move down and contact the stop on material P, releasing material P, which can then continue to move forward.

[0051] The release assembly 30 includes a release mechanism driven by a linear actuator. A specific example of the linear actuator is the electromagnet 31 shown in the figure, but other forms may also be used. The electromagnet 31 has a push rod 31a for actuating the release mechanism of the release assembly 30. In the de-energized state of the electromagnet 31, the push rod 31a retracts; in the energized state of the electromagnet 31, the push rod 31a extends. The electromagnet 31 is mounted below the flat wall 10c of the frame 10 and behind the vertical wall 10a, with the push rod 31a perpendicular to the vertical wall 10a of the frame 10.

[0052] The release mechanism is a linkage mechanism, including a translation rod 32, a rocker arm 33, and a connecting rod 34. The end of the push rod 31a is connected to the translation rod 32, which drives the rocker arm 33 and the connecting rod 34. The main body of the translation rod 32 is located in front of the vertical wall 10a of the frame 10. The main body of the translation rod 32, the rocker arm 33, and the connecting rod 34 are generally located within the release mechanism space 10e of the frame.

[0053] A vertical elongated hole 32a is formed in the body portion of the translation rod 32. The elongated hole 32a extends laterally through the body portion of the translation rod 32. A guide portion 32b is connected to the rear of the body portion of the translation rod 32. The guide portion 32b passes through a through hole 10f in the vertical wall 10a and can be guided by the through hole 10f to translate back and forth, thereby enabling the translation rod 32 to translate back and forth relative to the frame 10.

[0054] Setting a rocker arm 33 and a connecting rod 34 on the left and right sides of the translation rod 32 is beneficial for the uniform distribution of force in the release mechanism. However, the release mechanism of this application also includes a structure with a rocker arm 33 and a connecting rod 34.

[0055] The lower end of each rocker arm 33 is pivotally supported on the lower part of the corresponding side wall 10b of the frame 10 via a transverse pivot 33a. The upper end of each rocker arm 33 is pivotally connected to the lower end of the corresponding link 34 via a transverse pivot 33b. The pivot 33b passes through an elongated hole 32a, allowing it to move up and down within the elongated hole 32a. The upper end of each link 34 is pivotally connected to (and also supports) the front part of the bottom wall 21a of the bracket 21 via a transverse pivot 34a.

[0056] When the electromagnet 31 is de-energized, the push rod 31a retracts under the action of the return spring in the electromagnet 31. The push rod 31a pulls the translation rod 32 backward, causing the main body of the translation rod 32 to abut against the support part on the front surface of the vertical wall 10a (e.g., the forward-protruding boss on the front surface of the vertical wall 10a shown in the figure), thereby limiting the retracted position of the push rod 31a and the translation rod 32. In the retracted position of the translation rod 32, the pivot 33b is close to the upper edge of the elongated hole 32a, but with a small gap between it and the upper edge of the elongated hole 32a. The longitudinal position of the centerline of the pivot 33b is slightly rearward relative to the longitudinal positions of the centerlines of the pivot 33a and the pivot 34a, causing the upper end of the rocker arm 33 to be slightly rearward relative to the lower end (i.e., the rocker arm 33 is slightly tilted backward), while the upper end of the connecting rod 34 is slightly forward relative to the lower end (i.e., the connecting rod 34 is slightly tilted forward). This positional relationship of the pivots allows the gravity of the stop assembly 20 to be transmitted to the pivot 33b via the link 34, generating a rearward component force on the pivot 33b, thereby providing a stable holding state for the release mechanism (see...). Figure 2 , Figure 10 Furthermore, in the retracted position of the translation rod 32, the longitudinal position of the center line of the pivot 34a can be slightly rearward relative to the longitudinal position of the center line of the pivot 33a, but slightly forward relative to the longitudinal position of the center line of the pivot 33b, so that the tilt (forward tilt) angle of the connecting rod 34 is smaller than the tilt (backward tilt) angle of the rocker arm 33, thus providing more stable support for the bracket 21.

[0057] After the operation on material P is completed, electromagnet 31 is energized, push rod 31a extends forward, and pushes translation rod 32 forward. Translation rod 32 pushes pivot 33b forward, and pivot 33b swings rocker arm 33 forward. When rocker arm 33 swings forward, pivot 33b first moves slightly upward in elongated hole 32a, and pivot 33b pushes connecting rod 34 slightly upward until rocker arm 33 reaches upright position from slightly backward tilted position; next, rocker arm 33 tilts forward from upright position. During the forward tilting action of rocker arm 33, the trajectory of pivot 33b is forward and downward along an arc, so pivot 33b is guided to move downward in elongated hole 32a, and pivot 34a is pulled downward by connecting rod 34, causing bracket 21 to swing downward around rear pivot 21g. When the bracket 21 swings downward, it causes the stop 23 to swing downward until the stop 23c moves downward away from the bottom of the material P, thereby achieving and maintaining the material release state (see...). Figure 8 , Figure 9 The material release state can be achieved by the blocking effect of a stationary part in the material stopping device on a moving part, for example, by the bottom wall 21a of the bracket 21 contacting the inclined part on the upper surface of the flat wall 10c of the frame 10; or, by the maximum extension stroke of the push rod 31a, etc.

[0058] In the material release state, once the stop 23c disengages from the material P, the piston rod 22a of each buffer cylinder 22 pushes the cylinder body, along with the sleeve 27, back to the rearmost position, and the stop 23 returns to the position where its main body 23a pushes against the rear end wall 21b of the bracket 21 (see...). Figure 11 ).

[0059] The material release state is maintained until material P completely moves forward away from the stop 23c. Then, electromagnet 31 retracts, pulling translation rod 32 backward, which, via pivot 33b, carries rocker arm 33 and connecting rod 34 back to the waiting state (see...). Figure 12 ).

[0060] It should be noted that the material stopping device of this application is not limited to the specific examples described above, but can be adapted to actual applications.

[0061] For example, in the example described above, two buffer cylinders 22 were used. However, when the material mass or volume is large, the material stopping device is correspondingly constructed to be larger, and the size and / or shape of the stop 23 may allow for the use of more buffer cylinders. Regardless of the specific number of buffer cylinders, they are preferably arranged symmetrically from left to right so that they can provide the stop 23 with the most symmetrical buffering force possible.

[0062] For example, in the example described above, the check valve 24 is in the form of a swinging motion achieved by a torsion spring 24b; however, the check valve 24 can also be constructed to move up and down under the action of a spring. Furthermore, in some applications, it may not be necessary to provide a check valve function for the material P, i.e., the check valve 24 is not required.

[0063] For example, in the example described above, a stop 26 is fixed on the bottom wall of each socket 21f of the bracket 21, which is used to be pushed by the front end of the piston rod 22a of the corresponding buffer cylinder 22; however, in some versions, the stop 26 can be removed, so that the front end of the piston rod 22a of the buffer cylinder 22 directly pushes against the bottom wall of the socket 21f.

[0064] For example, in the example described above, the stop portion 23c of the stop member 23 is formed at the front end of the top wall 23b; however, for certain shaped materials P, the stop portion 23c can be formed directly on the upper edge of the body 23a.

[0065] For example, in the example described above, the cylinder body of the buffer cylinder 22 moves forward with the stop 23, and the stop 23 moves backward with the cylinder body of the buffer cylinder 22; however, it is also feasible to fix the cylinder body of the buffer cylinder 22 and the stop 23 together (for example, by fixing them with the sleeve 27) to achieve integrated movement.

[0066] Based on the principles of this application, those skilled in the art can make other modifications to the material stop device of this application.

[0067] According to the material stopping device of this application, two or more parallel-arranged buffer cylinders are used, thus the stop can provide a larger buffer load, improving the buffering capacity of the material stopping device. Furthermore, the cylinder body of each buffer cylinder is installed inside the stop, thereby following the stop, which is equivalent to adding the mass of each cylinder body to the stop, thereby increasing the total mass of the blocked material. This measure further improves the buffering capacity of the material stopping device. The material stopping device with the above-described structure of this application does not increase the overall outer dimension and does not require a larger installation space in the material conveyor line than the prior art. In addition, since two or more buffer cylinders are used, the buffer load can be distributed, making it less likely to generate eccentric loads and reducing the possibility of oil leakage from the buffer cylinders due to long-term eccentric loads.

[0068] While this application has been described herein with reference to specific exemplary embodiments, the scope of this application is not limited to the details shown. Various modifications may be made to these details without departing from the basic principles of this application.

Claims

1. A material stopping device, comprising: The frame (10), and the stop assembly (20) and release assembly (30) assembled on the frame (10); The stop assembly (20) includes: The bracket (21) is mounted on the upper part of the frame (10) via a transverse pivot (21g) and includes a rear end wall (21b) and a front end wall (21c); A stop (23) includes a main body (23a) and a stop portion (23c) located above the main body (23a), the stop portion (23c) being configured to be pushed forward by longitudinally traveling material (P), the main body (23a) being arranged to move back and forth between the rear end wall (21b) and the front end wall (21c) of the bracket (21); and At least two buffer cylinders (22) are arranged in parallel to each other. The cylinder body of each buffer cylinder (22) is fixed in a corresponding sleeve (27). Each sleeve (27) is fixed in a mounting through hole (23d) in the main body (23a) of the stop (23), so that the cylinder body of each buffer cylinder (22) can move forward with the stop (23) and the stop (23) can move backward with the cylinder body of the buffer cylinder (22). The piston rod (22a) of each buffer cylinder (22) pushes forward against the front end wall (21c) of the bracket (21), and the bracket (21) provides guidance for the forward and backward movement of the cylinder body of each buffer cylinder (22). The release assembly (30) includes a release mechanism and a linear actuator for driving the release mechanism; the release mechanism is configured to cause the bracket (21) to oscillate about the pivot (21g).

2. The material stopping device as described in claim 1, wherein, Each sleeve (27) passes longitudinally through the mounting through hole (23d) of the main body (23a) of the stop (23), and the front end of each sleeve (27) is guided by the corresponding insertion hole (21f) formed in the front end wall (21c) of the bracket (21), and the rear end of each sleeve (27) is guided by the corresponding guide through hole (21e) formed in the rear end wall (21b) of the bracket (21).

3. The material stopping device as described in claim 2, wherein, Each sleeve (27) is provided with an annular flange (27a), and the front surface of the main body (23a) of the stop (23) abuts against the rear edge of the annular flange (27a).

4. The material stopping device as described in claim 2, wherein, Each socket (21f) is equipped with a stop (26), which is pushed by the front end of the piston rod (22a) of the corresponding buffer cylinder (22).

5. The material stopping device as described in claim 2, wherein, Each guide hole (21e) is provided with a first guide sleeve (28) for guiding the rear section of the sleeve (27); each insertion hole (21f) is provided with a second guide sleeve (29) for guiding the front end of the sleeve (27).

6. The material stop device as described in any one of claims 1-5, wherein, The centerline of at least one of the buffer cylinders (22) passes through the first transverse side portion of the body (23a) of the stop (23), and the centerline of at least another buffer cylinder (22) passes through the second transverse side portion of the body (23a) of the stop (23).

7. The material stop device as described in any one of claims 1-5, wherein, The stop (23) also includes a top wall (23b) extending forward from the upper edge of the main body (23a), and the stop portion (23c) is formed at the front end of the top wall (23b) and protrudes upward. When the stop portion (23c) is not pushed forward by the material (P), the rear surface of the main body (23a) of the stop (23) is adjacent to the front surface of the rear end wall (21b) of the bracket (21).

8. The material stopping device as described in claim 7, wherein, The stop assembly (20) also includes a check element (24) acted upon by a torsion spring (24b), which is pivotally disposed in a notch (21d) at the upper end of the rear end wall (21b) of the bracket (21).

9. The material stop device as described in claim 8, wherein, A recess (23e) is formed in the transition between the upper edge of the main body (23a) of the stop member (23) and the rear edge of the top wall (23b). When the stop member (24) is pushed forward by the material (P), the stop member (24) swings downward and partially enters the recess (23e).

10. The material stop device according to any one of claims 1-5, wherein, The release mechanism includes: a translation rod (32), a rocker arm (33), and a connecting rod (34); The translation rod (32) is configured to be driven by the linear actuator to move back and forth relative to the frame (10), and a vertically extending elongated hole (32a) is formed in the translation rod (32); The lower end of the rocker arm (33) is pivotally supported in the frame (10) via a first pivot (33a), the upper end of the rocker arm (33) is pivotally connected to the lower end of the connecting rod (34) via a second pivot (33b), the upper end of the connecting rod (34) pivotally supports the front of the bracket (21) via a third pivot (34a), and the second pivot (33b) is arranged in the elongated hole (32a) and can move up and down in the elongated hole (32a).

11. The material stopping device as claimed in claim 10, wherein, When the linear actuator is not activated, the translation rod (32) is in the retracted position, wherein the longitudinal position of the center line of the second pivot (33b) is rearward relative to the longitudinal position of the center line of the first pivot (33a) and the longitudinal position of the center line of the third pivot (34a).

12. The material stopping device as claimed in claim 11, wherein, When the translation rod (32) is in the retracted position, the longitudinal position of the center line of the third pivot (34a) is rearward relative to the longitudinal position of the center line of the first pivot (33a).

Images