A clamping mechanism for a mushroom bag capping machine

Abstract

The present invention relates to a clamping mechanism of a mushroom bag capping machine, comprising a base, a clamping claw, an opening and closing mechanism and a reset mechanism; the base is horizontally arranged, and a fixed base is fixed to the upper end of the middle part; a plurality of vertical hollow guide sleeves are fixed on the base; two clamping claws are arranged in a mirror-symmetrical manner in the middle of the front end of the base; the clamping claws comprise a clamping claw and a rotating shaft; the rotating shaft vertically passes through the middle and rear part of the clamping claw and is fixed on the base; the clamping claw is rotatably connected with the rotating shaft; the opening and closing mechanism comprises a push rod horizontally slidably sleeved on the fixed base and a push plate fixed on the end of one side of the push rod close to the clamping claw; the push plate can contact with the end of the clamping claw to control the opening and closing of the clamping claw; the reset mechanism can make the two clamping claws approach each other at one end away from the opening and closing mechanism.

Description

Technical Field

[0001] The invention relates to a clamping mechanism of a mushroom bag covering machine, belonging to the technical field of automated mechanical equipment. Background Art

[0002] Edible fungi refer to mushrooms (large fungi) with large fruiting bodies that can be eaten. Using plastic bags to cultivate and produce edible fungi is a production method that has developed in recent years. This bag cultivation method has the advantages of good sterilization effect, low risk of infection by bacteria, easy growth control, convenient management, and easy harvesting.

[0003] After the culture medium is bagged, the cultivation bag needs to be ringed, capped, and basketed. Ringing is a major step, and in the prior art, the culture bag is still generally ringed manually, which is not only time-consuming and labor-intensive, but also labor-intensive and has low production efficiency. In addition, although there are some mechanical ringing machines on the market, they have the disadvantages of complex ringing structure and difficult maintenance.

[0004] For example, the Chinese utility model patent "Automatic ring capping machine for edible mushroom bags" with the authorization announcement number CN206602877U has a ring mechanism that is used to clamp the ring and move the ring up and down to put the ring on the bag mouth of the edible mushroom bag. A cylinder is set on the lower surface of the sub-frame of the ring mechanism, and the cylinder can push the entire ring mechanism to move up and down, so that the clamping motion unit can move up and down in the sub-frame of the shrinking motion unit. The ring power unit pushes the clamping motion unit to move, so that the clamping motion unit clamps the ring.

[0005] The collar mechanism of the above patent is provided with a collar power unit and a collar drive unit, and both are driven by cylinders, linear motors or hydraulic cylinders, thus increasing the complexity of the collar mechanism structure. Summary of the invention

[0006] In order to overcome the above problems, the present invention provides a clamping mechanism for a mushroom bag covering machine. The clamping mechanism of the mushroom bag covering machine has a simple structure, removes the power unit, and cooperates with an external curved guide rail to achieve the lifting and opening and closing of the clamping mechanism, thereby simplifying the structure.

[0007] The technical solution of the present invention is as follows:

[0008] A clamping mechanism of a mushroom bag covering machine comprises a base, a clamping claw, an opening and closing mechanism and a reset mechanism; the base is horizontally arranged, and a fixed base is fixed to the upper end of the middle part; a plurality of vertical hollow guide sleeves are fixed on the base; two clamping claws are arranged in a mirror-symmetrical manner in the middle of the front end of the base; the clamping claws comprise a clamping jaw and a rotating shaft; the rotating shaft vertically passes through the middle and rear part of the clamping jaw and is fixed to the base; the clamping jaw is rotatably connected to the rotating shaft; the opening and closing mechanism comprises a push rod horizontally slidably sleeved on the fixed base and a push plate fixed to the end of the push rod near the clamping jaw; the push plate can contact the end of the clamping jaw to control the opening and closing of the clamping claw; the reset mechanism can make the two clamping claws approach each other at one end away from the opening and closing mechanism.

[0009] Furthermore, it also includes a curved guide rail; the curved guide rail can contact the end of the push rod, and the curved guide rail can push the push rod to achieve the opening and closing of the two clamping claws.

[0010] Furthermore, it also includes a lifting mechanism; the lifting mechanism is fixed at the lower rear end of the base and can increase the height of the base; the lifting mechanism is a lifting column vertically fixed at the lower rear end of the base; the curved guide rail can contact the end of the lifting column, and the curved guide rail can push the lifting column to achieve the raising and lowering of the height of the base.

[0011] Furthermore, the clamping jaw includes a horizontal claw body and an arc-shaped claw mouth vertically fixed at the front end of the claw body; the arc-shaped claw mouths on the two clamping jaws are surrounded to form a vertical hollow ring structure; the two claw bodies are arranged close to each other; the rotating shaft vertically passes through the middle and rear parts of the claw bodies and is fixed on the base; the claw body is rotatably fixed to the rotating shaft; the push plate can contact the end of the claw body; the reset mechanism can make the claw mouths of the two clamping claws approach each other; a plurality of teeth are provided at the ends of the two claw bodies that are close to each other; the teeth of the two claw bodies can mesh with each other.

[0012] Furthermore, a horizontal bottom plate is fixed to the middle part of the lower end of the base; the bottom plate is located below the clamping jaw; the clamping jaw comprises a horizontal claw body and a semi-cylindrical bag-holding tube vertically fixed to the front end of the claw body; the arc-shaped bag-holding tubes on the two clamping jaws are combined to form a vertical hollow cylindrical structure; the two claw bodies are arranged close to each other; the rotating shaft vertically passes through the middle and rear parts of the claw bodies and is fixed to the base; the claw body is rotatably fixed to the rotating shaft; the push plate can contact the end of the claw body; the reset mechanism can make the bag-holding tubes of the two clamping claws approach each other; a plurality of latch teeth are provided at the ends of the two claw bodies that are close to each other; the latch teeth of the two claw bodies can mesh with each other.

[0013] Furthermore, the resetting mechanism is a retaining spring; the two ends of the retaining spring are respectively fixed to the middle parts of the two claw bodies; the retaining spring provides elastic force to make the jaws of the two clamping jaws approach each other.

[0014] Furthermore, a bearing is fixed on the upper end of the claw body close to the opening and closing mechanism for vertical rotation; the distance between the two bearings is smaller than the distance between the two rotating shafts; the push plate can contact the bearing to control the opening and closing of the clamping claw.

[0015] Furthermore, the reset mechanism is a self-locking part; the self-locking part includes a connecting plate and a self-locking block; the connecting plate is fixed to the middle part of the front end of the push plate; the self-locking block is fixed to the middle part of the lower end of the connecting plate, and the self-locking block is located between the two bearings; one end of two reset springs are also fixed on both sides of the push plate, and the other ends of the two reset springs are respectively fixed on both sides of the base; the reset spring provides elastic force to keep the push plate away from the clamping claw; when the push plate retreats to the rear, the end faces of the two sides of the self-locking block can respectively fit with the two bearings, and the front end of the clamping claw is clamped; a horizontal limit pin is fixed on both sides of the push plate; one end of the reset spring is fixed on the limit pin.

[0016] Furthermore, a horizontal guide rod is fixed behind the push plate; the guide rod is parallel to the push rod; the guide rod passes through the fixing seat and can slide on the fixing seat.

[0017] Furthermore, the curved guide rail is located at the lower rear side of the base; the curved guide rail includes a lifting curved guide rail with an undulating upper end surface and an opening and closing curved guide rail with an undulating outer surface; the lifting curved guide rail can push the lifting column; the opening and closing curved guide rail can push the push rod.

[0018] The present invention has the following beneficial effects:

[0019] 1. The clamping mechanism of the mushroom bag capping machine has a simple structure, and the power unit is removed. By cooperating with the external curved guide rail, the lifting and opening and closing of the clamping mechanism can be realized, which simplifies the structure.

[0020] 2. The reset mechanism and the opening and closing mechanism cooperate to realize the automatic opening and closing of the clamping claw.

[0021] 3. Through the cooperation of the self-locking parts and the bearings, after the opening and closing mechanism is reset to the final position, the self-locking block automatically sticks between the two bearings, thereby restricting the clamping jaws so that the front end of the clamping jaws cannot be opened, maintaining the position of the clamping jaws and achieving a self-locking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention when used as a collar claw.

[0023] Figure 2 for Figure 1 Top view of the .

[0024] Figure 3 It is a schematic diagram of the overall structure when the collar claw with a self-locking member is clamped.

[0025] Figure 4 for Figure 3 Top view of the .

[0026] Figure 5 for Figure 4 A partial enlarged view of point A.

[0027] Figure 6 It is a schematic diagram of the overall structure when the collar claw provided with a self-locking member is opened.

[0028] Figure 7 for Figure 6 Top view of the .

[0029] Figure 8 for Figure 7 A local enlarged view of point B.

[0030] Fig. 9 It is a schematic diagram of the overall structure of the present invention when it is opened as a bag holding claw.

[0031] Fig.10 for Fig. 9 Top view of the .

[0032] The reference numerals in the figure are as follows:

[0033] 1. Base; 11. Guide sleeve; 12. Fixed seat; 2. Clamping claw; 21. Clamping claw; 22. Claw mouth; 23. Claw body; 24. Retention spring; 25. Gear; 26. Rotating shaft; 27. Bearing; 28. Bag holding tube; 29. ​​Bottom plate; 3. Lifting mechanism; 31. Lifting column; 4. Opening and closing mechanism; 41. Push rod; 42. Push plate; 43. Reset spring; 44. Limiting nail; 45. Guide rod; 5. Self-locking piece; 51. Connecting plate; 52. Self-locking block. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] See also Figure 1-8 , Example 1 of the present application, description of the clamping mechanism of the mushroom bag capping machine when used as a ring claw; see Figure 9-10 , Embodiment 2 of the present application, description of the clamping mechanism of the mushroom bag covering machine when used as a bag holding claw.

[0036] Embodiment 1:

[0037] See also Figure 1-2 , a clamping mechanism of a mushroom bag covering machine, comprising a base 1, a clamping claw 2, an opening and closing mechanism 4 and a reset mechanism; the base 1 is horizontally arranged, and a fixed seat 12 is fixed at the upper end of the middle part; a plurality of vertical hollow guide sleeves 11 are fixed on the base 1; the two clamping claws 2 are arranged in a mirror-symmetrical manner in the middle of the front end of the base 1; the clamping claw 2 comprises a clamping claw 21 and a rotating shaft 26; the rotating shaft 26 vertically passes through the middle and rear part of the clamping claw 21 and is fixed on the base 1; the clamping claw 21 is rotatably connected with the rotating shaft 26; the opening and closing mechanism 4 comprises a push rod 41 horizontally slidably sleeved on the fixed seat 12 and a push plate 42 fixed on the end of the push rod 41 close to the clamping claw 21; the push plate 42 can contact with the end of the clamping claw 21, thereby controlling the opening and closing of the clamping claw 2; the reset mechanism can make the two clamping claws 2 approach each other at one end away from the opening and closing mechanism 4.

[0038] According to the above description, the clamping mechanism of the mushroom bag capping machine includes a base 1, a clamping claw 2, an opening and closing mechanism 4 and a reset mechanism. A fixed seat 12 is arranged on the base 1; a plurality of guide sleeves 11 are arranged on the base 1, arranged around the outside of the fixed seat 12, and the guide sleeves 11 are slidably sleeved on the column of the frame (not shown in the figure). The two clamping claws 2 are arranged in a mirror-symmetrical manner in the middle of the front end of the base 1, and the clamping claws 21 of the clamping claws 2 are rotatably fixed to the base 1 through the rotating shaft 26. The reset mechanism cooperates with the two clamping claws 2 to reset and clamp the clamping claws 2 opened at the front end. The push rod 41 of the opening and closing mechanism 4 is slidably sleeved on the fixed seat 12, and a push plate 42 capable of contacting the rear end of the clamping claw 21 is fixed to the end of the push rod 41 close to the clamping claw 2. The push rod 41 moves forward, which can drive the push plate 42 to push the rear end of the clamping jaw 21, so that the clamping jaw 21 rotates around the rotating shaft 26, and the rear ends of the two clamping jaws 21 approach each other while the front ends of the two clamping jaws 21 open outward; after the push rod 41 moves backward, the originally opened clamping claw hand 2 is clamped by the pulling force of the reset mechanism, and the rear end of the clamping jaw 21 retracts and resets, driving the push plate 42 and the push rod 41 to retreat, thereby achieving the clamping of the clamping claw hand 2.

[0039] In particular, the base 1 of the present application adopts a structure similar to an isosceles trapezoid, and four guide sleeves 11 are respectively fixed at the four corners of the base 1.

[0040] In particular, the position where the push plate 42 contacts the rear end of the clamping jaws 21 should be closer to the axis of the push rod 41 than the rotating shaft 26 to ensure that when the push plate 42 pushes the clamping jaws 21, the rear ends of the two clamping jaws 21 approach each other and the front ends of the two clamping jaws 21 open outward.

[0041] In particular, the reset mechanism can be used to reset and clamp the opened clamping claw 2 on the one hand, and can also be used to prevent the originally clamped clamping claw 2 from opening due to the force on the front end on the other hand.

[0042] Furthermore, it also includes a curved guide rail; the curved guide rail can contact the end of the push rod 41, and the curved guide rail can push the push rod 41 to achieve the opening and closing of the two clamping claws 2.

[0043] Furthermore, it also includes a lifting mechanism 3; the lifting mechanism 3 is fixed at the lower rear end of the base 1, and can lift the height of the base 1; the lifting mechanism 3 is a lifting column 31 vertically fixed at the lower rear end of the base 1; the curved guide rail can contact the end of the lifting column 31, and the curved guide rail can push the lifting column 31 to achieve the lifting and lowering of the height of the base 1. After the lower end of the lifting column 31 is pushed, the guide sleeve 11 and the column of the frame can guide the clamping mechanism of the mushroom bag capping machine on the frame; after the lower end of the lifting column 31 is no longer subjected to force, the clamping mechanism of the mushroom bag capping machine can descend under the action of its own gravity.

[0044] Furthermore, the clamping jaw 21 includes a horizontal jaw body 23 and an arc-shaped jaw opening 22 vertically fixed at the front end of the jaw body 23; the arc-shaped jaw openings 22 on the two clamping jaws 21 are enclosed to form a vertical hollow ring structure; the two jaw bodies 23 are arranged close to each other; the rotating shaft 26 vertically passes through the middle and rear part of the jaw body 23 and is fixed on the base 1; the jaw body 23 is rotatably fixed to the rotating shaft 26; the push plate 42 can contact the end of the jaw body 23; the reset mechanism can make the jaw openings 22 of the two clamping claws 2 approach each other; the ends of the two jaw bodies 23 that are close to each other are both provided with a plurality of latch teeth 25; the latch teeth 25 of the two jaw bodies 23 can mesh with each other. The arc-shaped jaw opening 22 can cooperate with the circular collar to clamp and complete the installation of the collar; the jaw body 23 contacts the push plate 42 and rotates around the rotating shaft 26 to realize the opening and closing of the clamping claw 2. The jaw body 23 of the clamping jaw 21 is provided with a latching tooth 25 , and the latching teeth 25 of the two clamping jaws 21 can mesh with each other, so that the two clamping jaws 21 can maintain good synchronization during the opening and closing process of the clamping jaws 21 .

[0045] Furthermore, the resetting mechanism is a retaining spring 24; the two ends of the retaining spring 24 are respectively fixed to the middle of the two claw bodies 23; the retaining spring 24 provides elastic force to make the claw openings 22 of the two clamping claws 21 close to each other.

[0046] In particular, both ends of the retaining spring 24 can be directly fixed on the clamping jaw 21 , or can be fixed by hooking on pins fixed on the clamping jaw 21 .

[0047] Furthermore, a bearing 27 is vertically rotatably fixed to the upper end of the claw body 23 near the opening and closing mechanism 4; the distance between the two bearings 27 is smaller than the distance between the two rotating shafts 26; the push plate 42 can contact the bearing 27, thereby controlling the opening and closing of the clamping claw hand 2. The bearing 27 contacts the push plate 42, and the original sliding friction between the push plate 42 and the clamping claw hand 2 is changed to rolling friction, which can reduce the wear between the parts and increase the service life.

[0048] Furthermore, a horizontal guide rod 45 is fixed behind the push plate 42; the guide rod 45 is parallel to the push rod 41; the guide rod 45 passes through the fixing seat 12 and can slide on the fixing seat 12. The guide rod 45 is mainly used to improve the stability of the push rod 41 when moving.

[0049] Furthermore, the curved guide rail is located at the lower rear side of the base 1; the curved guide rail includes a lifting curved guide rail with an undulating upper end surface and an opening and closing curved guide rail with an undulating outer surface; the lifting curved guide rail can push the lifting column 31; the opening and closing curved guide rail can push the push rod 41. The end of the push rod 41 away from the clamping claw hand 2 cooperates with an opening and closing curved guide rail (not shown in the figure) arranged on the frame and having an undulating outer surface. The push rod 41 is pushed forward by the convex surface of the opening and closing curved guide rail, and the push plate 42 can push the rear end of the clamping jaw 21, so that the clamping jaw 21 rotates around the rotating shaft 26, and the rear ends of the two clamping jaws 21 approach each other while the front ends of the two clamping jaws 21 open outward; after the push rod 41 leaves the convex surface of the opening and closing curved guide rail and enters the concave surface of the opening and closing curved guide rail, the rear end of the push rod 41 is no longer subjected to force, and the originally opened clamping claw hand 2 is clamped by the pulling force of the reset mechanism, and the front end of the clamping jaw 21 retracts and resets, driving the push plate 42 and the push rod 41 to retreat, thereby realizing the clamping of the clamping claw hand 2. The lower end of the lifting column 31 cooperates with a lifting curved guide rail (not shown in the figure) arranged on the frame and having an undulating upper end surface, and the guiding effect of the guide sleeve 11 and the column of the frame is used to realize the lifting and lowering of the clamping mechanism of the mushroom bag covering machine on the frame.

[0050] See also Figure 3-8 As an alternative to the reset mechanism in this embodiment, the reset mechanism is a self-locking member 5, and a reset spring 43 and a limit pin 44 that cooperate with the self-locking member 5 are additionally provided.

[0051] Furthermore, the reset mechanism is a self-locking member 5; the self-locking member 5 includes a connecting plate 51 and a self-locking block 52; the connecting plate 51 is fixed to the middle of the front end of the push plate 42; the self-locking block 52 is fixed to the middle of the lower end of the connecting plate 51, and the self-locking block 52 is located between the two bearings 27; one end of two reset springs 43 are also fixed on both sides of the push plate 42, and the other ends of the two reset springs 43 are respectively fixed on both sides of the base 1; the reset spring 43 provides elastic force to keep the push plate 42 away from the clamping claw 2; when the push plate 42 retreats to the rear, the end faces of the self-locking block 52 on both sides can respectively fit with the two bearings 27, and the claw mouth 22 at the front end of the clamping claw 21 is clamped; a horizontal limit pin 44 is fixed on both sides of the push plate 42; one end of the reset spring 43 is fixed on the limit pin 44.

[0052] According to the above description, the reset mechanism adopts a self-locking member 5. The self-locking member 5 includes a connecting plate 51 and a self-locking block 52. The connecting plate 51 is fixed to the front end of the push plate 42, and the self-locking block 52 is fixed to the middle of the lower end of the connecting plate 51, and the self-locking block 52 is located between the two bearings 27. Reset springs 43 are also fixed on both sides of the push plate 42, and the other end of the reset spring 43 is fixed on the base 1; the reset spring 43 provides a pulling force to keep the push plate 42 away from the clamping claw 2. When the push rod 41 is pushed forward by the convex surface of the opening and closing curved guide rail, the push plate 42 moves forward, driving the self-locking block 52 on the connecting plate 51 to move forward, so that the self-locking block 52 is away from the bearing 27; then, when the push plate 42 moves forward, it can push the rear end of the clamping jaw 21 through the bearing 27, and at the same time, because the self-locking block 52 has left between the two bearings 27, the clamping jaw 21 can rotate around the rotating shaft 26, and the rear ends of the two clamping jaws 21 are close to each other, and the jaws 22 of the two clamping jaws 21 open outward. After the push rod 41 leaves the convex surface of the opening and closing curved guide rail and enters the concave surface of the opening and closing curved guide rail, the rear end of the push rod 41 is no longer stressed, so under the pulling force of the reset spring 43, the push plate 42 begins to retreat. During the retreat of the push plate 42, the self-locking block 52 contacts the bearing 27 and pushes the two bearings 27 away from each other, so that the rear end of the clamping jaw 21 is opened around the rotating shaft 26 and the front end is clamped, thereby achieving the clamping of the clamping claw hand 2. After the clamping claw hand 2 is clamped, the two outer end faces of the self-locking block 52 are attached to the bearing 27, and the self-locking block 52 is located between the two bearings 27. By limiting the two bearings 27 from getting closer, the jaw 22 of the clamping jaw 21 cannot be opened outward, thereby achieving the self-locking effect. The limit pin 44 can provide a simpler and more convenient way to fix the reset spring 43.

[0053] In particular, both ends of the return spring 43 can be directly fixed on the push plate 42 or the base 1 , or can be fixed by hooking on pins fixed on the push plate 42 or the base 1 .

[0054] In particular, the self-locking block 52 should be disposed close to the front end of the connecting plate 51 so as to leave enough space for the bearing 27 to move.

[0055] Embodiment 2:

[0056] See also Figure 9-10 The difference between this embodiment and the first embodiment is that the clamping mechanism of the mushroom bag covering machine is used as the bag holding claw, so the parts with the same principles in the first embodiment and the second embodiment will not be described repeatedly.

[0057] When the clamping mechanism of the mushroom bag covering machine is used as a bag holding claw, a horizontal bottom plate 29 is fixed to the middle part of the lower end of the base 1; the bottom plate 29 is located below the clamping claw 21; the clamping claw 21 includes a horizontal claw body 23 and a semi-cylindrical bag holding tube 28 vertically fixed to the front end of the claw body 23; the arc-shaped bag holding tubes 28 on the two clamping claws 21 are surrounded to form a vertical hollow cylindrical structure; the two claw bodies 23 are arranged close to each other; the rotating shaft 26 vertically passes through the middle and rear parts of the claw bodies 23 and is fixed on the base 1; the claw body 23 is rotatably fixed to the rotating shaft 26; the push plate 42 can contact the end of the claw body 23; the reset mechanism can make the bag holding tubes 28 of the two clamping claws 2 approach each other; a plurality of latch teeth 25 are provided at the ends of the two claw bodies 23 that are close to each other; the latch teeth 25 of the two claw bodies 23 can mesh with each other. The bottom plate 29 is used to receive the mushroom bag, and the semi-cylindrical bag holding tube 28 can be used to clamp and clamp the mushroom bag; the claw body 23 contacts the push plate 42 and rotates around the rotating shaft 26 to realize the opening and closing of the clamping claw hand 2. The claw body 23 of the clamping claw 21 is provided with a latching tooth 25, and the latching teeth 25 of the two clamping claws 21 can mesh with each other, so that during the opening and closing process of the clamping claw 21, the two clamping claws 21 can maintain good synchronization.

[0058] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A clamping mechanism for a mushroom bag capping machine, characterized in that: The invention comprises a base (1), a clamping claw (2), an opening and closing mechanism (4) and a reset mechanism; the base (1) is arranged horizontally, and a fixing seat (12) is fixed to the upper end of the middle part; a plurality of vertical hollow guide sleeves (11) are fixed to the base (1); the two clamping claws (2) are arranged in a mirror-symmetrical manner at the middle part of the front end of the base (1); the clamping claw (2) comprises a clamping claw (21) and a rotating shaft (26); the rotating shaft (26) vertically passes through the middle and rear part of the clamping claw (21) and is fixed to the base (1). The clamping jaw (21) is rotatably connected to the rotating shaft (26); the opening and closing mechanism (4) comprises a push rod (41) horizontally slidably sleeved on the fixing seat (12) and a push plate (42) fixed to the end of the push rod (41) close to the clamping jaw (21); the push plate (42) can contact the end of the clamping jaw (21) to control the opening and closing of the clamping jaw (2); the reset mechanism can make the ends of the two clamping jaws (2) away from the opening and closing mechanism (4) approach each other; The clamping claw (21) comprises a horizontal claw body (23) and an arc-shaped claw mouth (22) vertically fixed to the front end of the claw body (23); the arc-shaped claw mouths (22) on the two clamping claws (21) are surrounded to form a vertical hollow ring structure; the two claw bodies (23) are arranged close to each other; the rotating shaft (26) vertically passes through the middle and rear parts of the claw bodies (23) and is fixed on the base (1); the claw body (23) is rotatably fixed to the rotating shaft (26); the push plate (42) can contact the end of the claw body (23); the reset mechanism can make the claw mouths (22) of the two clamping claws (2) approach each other; the ends of the two claw bodies (23) that are close to each other are both provided with a plurality of latch teeth (25); the latch teeth (25) of the two claw bodies (23) can mesh with each other; or, a horizontal bottom plate (29) is fixed to the middle part of the lower end of the base (1) ; The bottom plate (29) is located below the clamping claw (21); the clamping claw (21) comprises a horizontal claw body (23) and a semi-cylindrical bag-holding tube (28) vertically fixed to the front end of the claw body (23); the arc-shaped bag-holding tubes (28) on the two clamping claws (21) are surrounded to form a vertical hollow cylindrical structure; the two claw bodies (23) are arranged close to each other; the rotating shaft (26) vertically passes through the middle and rear parts of the claw bodies (23) and is fixed on the base (1); the claw body (23) is rotatably fixed to the rotating shaft (26); the push plate (42) can contact the end of the claw body (23); the reset mechanism can make the bag-holding tubes (28) of the two clamping claws (2) approach each other; the ends of the two claw bodies (23) that are close to each other are both provided with a plurality of latch teeth (25); the latch teeth (25) of the two claw bodies (23) can mesh with each other; A bearing (27) is fixed vertically and rotatably on the upper end of the claw body (23) close to the opening and closing mechanism (4); the distance between the two bearings (27) is smaller than the distance between the two rotating shafts (26); the push plate (42) can contact the bearing (27) to control the opening and closing of the clamping claw hand (2); The reset mechanism is a self-locking member (5); the self-locking member (5) comprises a connecting plate (51) and a self-locking block (52); the connecting plate (51) is fixed to the middle of the front end of the push plate (42); the self-locking block (52) is fixed to the middle of the lower end of the connecting plate (51), and the self-locking block (52) is located between the two bearings (27); one end of two reset springs (43) are also fixed on both sides of the push plate (42), and the two reset springs (43) are ) are respectively fixed on both sides of the base (1); the return spring (43) provides elastic force to make the push plate (42) move away from the clamping claw (2); when the push plate (42) retreats to the rear, the end faces of the two sides of the self-locking block (52) can respectively fit with the two bearings (27), and the front end of the clamping claw (21) is clamped; a horizontal limit pin (44) is respectively fixed on both sides of the push plate (42); one end of the return spring (43) is fixed on the limit pin (44).

2. The clamping mechanism of the mushroom bag covering machine according to claim 1 is characterized in that: It also includes a curved guide rail; the curved guide rail can contact the end of the push rod (41), and the curved guide rail can push the push rod (41) to achieve the opening and closing of the two clamping claws (2).

3. The clamping mechanism of the mushroom bag capping machine according to claim 2 is characterized in that: It also includes a lifting mechanism (3); the lifting mechanism (3) is fixed to the lower rear end of the base (1) and can lift the height of the base (1); the lifting mechanism (3) is a lifting column (31) vertically fixed to the lower rear end of the base (1); the curved guide rail can contact the end of the lifting column (31), and the curved guide rail can push the lifting column (31) to achieve the lifting and lowering of the height of the base (1).

4. The clamping mechanism of the mushroom bag capping machine according to claim 1 is characterized in that: The resetting mechanism is a retaining spring (24); the two ends of the retaining spring (24) are respectively fixed to the middle parts of the two claw bodies (23); the retaining spring (24) provides elastic force to make the front ends of the two clamping claws (21) approach each other.

5. The clamping mechanism of the mushroom bag capping machine according to claim 1 is characterized in that: A horizontal guide rod (45) is also fixed behind the push plate (42); the guide rod (45) is parallel to the push rod (41); the guide rod (45) passes through the fixing seat (12) and can slide on the fixing seat (12).

6. The clamping mechanism of the mushroom bag capping machine according to claim 3 is characterized in that: The curved guide rail is located at the lower rear side of the base (1); the curved guide rail comprises a lifting curved guide rail with an undulating upper end surface and an opening and closing curved guide rail with an undulating outer peripheral surface; the lifting curved guide rail can push the lifting column (31); and the opening and closing curved guide rail can push the push rod (41).

Images