Iron bucket cover opening device

Abstract

The utility model relates to the technical field of raw material unsealing, and discloses an iron bucket cover opening device which comprises a first connecting rod, a second connecting rod is arranged on one side wall of the first connecting rod, one end of the first connecting rod is fixedly connected with an unlocking block, one end of the second connecting rod is fixedly connected with unlocking rods which are symmetrical left and right, and an attaching assembly is arranged in the unlocking block. And the attaching assembly comprises a plurality of first movable rods, connecting plates are fixedly connected to the bottoms of the first movable rods, and first reset springs are arranged on the side walls of the connecting plates. When a worker inserts the unlocking block into the cover, the unlocking block is extruded by the inner wall of the cover, the movable rod retracts and is tightly attached to the inner wall of the cover after being inserted in place, the connecting rod is rotated to drive the small cover to be opened, and when the large cover is opened, the unlocking rod is clamped into and makes contact with the protruding part of the inner wall of the large cover, and the connecting rod is rotated to drive the large cover to be opened. The problem that efficiency is low when different barrel covers are opened in a traditional mode is solved, and workshop production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to raw material opening technology field especially relates to a open iron bucket cover device. BACKGROUND

[0002] In industrial production, especially in many fields such as chemical industry, food, pharmaceuticals, iron barrels are widely used as common containers for storing and transporting raw materials. In the production process, it is frequently necessary to open the iron barrel cover for material taking, adding or transferring, etc. With the expansion of production scale and the acceleration of production rhythm, higher requirements are put forward for the efficiency and convenience of opening the iron barrel cover. A high-efficiency and reliable iron barrel cover opening device can greatly improve the smoothness of production operation, reduce the production stagnation caused by too long time consumption in the opening cover link, and thus ensure the efficient operation of the whole production process.

[0003] At present, in the existing technology of opening the iron barrel cover, the common way is manual tool opening, for example, workers will use a crowbar to insert one end of the crowbar into the gap between the barrel cover and the barrel body, and separate the barrel cover from the barrel body by applying external force. Some use wrench tools to open the cover by rotating the bolt for the barrel cover with a bolt. These methods can complete the opening task to some extent, but also have many limitations.

[0004] The main problem existing in the prior art is that the efficiency is extremely low when opening different types of iron barrel covers. Since the iron barrel is widely used, its barrel cover design is diverse, including ordinary screw caps of different sizes and covers with special locking structures. Traditional manual tool opening requires workers to frequently change tools according to the type of barrel cover, which is tedious and labor-intensive. Each opening takes a long time. Due to the lack of flexibility, it is often difficult to play an effective role in the face of different shapes and specifications of the barrel cover, resulting in that the opening link becomes a bottleneck affecting the overall production efficiency in the workshop production, which seriously restricts the improvement of production progress. Therefore, an iron barrel cover opening device is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides an iron barrel cover opening device, which aims to improve the problem of low efficiency in opening different barrel covers in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] An iron barrel cover opening device, comprising a connecting rod one, a connecting rod two is arranged on the side wall of the connecting rod one, a plurality of anti-skid rings are fixedly connected to the outer walls of the connecting rod one and the connecting rod two, the anti-skid rings are arranged in an array, one end of the connecting rod one is fixedly connected with an unlocking block, one end of the connecting rod two is fixedly connected with left-right symmetrical unlocking rods, and the unlocking block is internally provided with a fitting assembly.

[0008] The fitting assembly comprises a plurality of movable rods I, which are arranged in an array on the left and right sides of the unlocking block, and the outer walls of the movable rods I are slidably connected to the inside of the unlocking block, the bottom of the movable rod I is fixedly connected with a connecting plate, the outer wall of the connecting plate is slidably connected to the inside of the unlocking block, the side wall of the connecting plate is provided with a reset spring I, one end of the reset spring I is fixedly connected to the side wall of the connecting plate, and the other end of the reset spring I is fixedly connected to the inside of the unlocking block.

[0009] As a further description of the above technical scheme:

[0010] The side wall of the connecting rod II is fixedly connected with a cross-shaped block, the side wall of the connecting rod I is provided with a cross-shaped hole, and the outer wall of the cross-shaped block is slidably connected to the inner wall of the cross-shaped hole.

[0011] As a further description of the above technical scheme:

[0012] The outer wall of the connecting rod II is provided with a sliding groove, and the sliding groove is located at the side of the cross-shaped block.

[0013] As a further description of the above technical scheme:

[0014] The inner wall of the sliding groove is slidably connected with a sliding block, and the sliding block is located in the inside of the connecting rod I.

[0015] As a further description of the above technical scheme:

[0016] The bottom of the sliding block is fixedly connected with a linkage rod, the outer wall of the linkage rod is slidably connected to the inside of the cross-shaped block, the bottom of the linkage rod is provided with a reset spring II, one end of the reset spring II is fixedly connected to the bottom of the linkage rod, the other end of the reset spring II is fixedly connected to the inside of the cross-shaped block, and the outer wall of the linkage rod is provided with a plurality of accommodating grooves.

[0017] As a further description of the above technical scheme:

[0018] The outer wall of the linkage rod is provided with a plurality of movable rods II, which are arranged in a circumferential array in the inside of the cross-shaped block, and the outer wall of the movable rod II is slidably connected to the inside of the cross-shaped block.

[0019] As a further description of the above technical scheme:

[0020] The outer wall of the movable rod II is fixedly connected with a limiting plate, and the outer wall of the limiting plate is slidably connected to the inner wall of the cross-shaped block.

[0021] As a further description of the above technical scheme:

[0022] The limiting spring one end is fixedly connected to the limiting plate side wall, and the other end is fixedly connected to the cross-shaped block inside.

[0023] The utility model has the advantages of the following:

[0024] 1、The utility model discloses a connecting rod one end's unlocking block is inserted into the cover, is extruded by the cover inner wall, and the unlocking block side wall movable rod retracts, and after being inserted in place, the movable rod resets and sticks to the cover inner wall, and the connecting rod is rotated and drives the small cover to open, and when the big cover is opened, the unlocking rod of the other end of the connecting rod is clamped into, contacts the big cover inner wall convex part, and the connecting rod is rotated and drives the big cover to open, solve the problem of low efficiency of opening different barrel covers in traditional mode, improve the workshop production efficiency.

[0025] 2、The utility model discloses a first forward sliding slider, drives the linkage rod to move forward, and the reset spring is compressed, and the accommodating groove moves synchronously, makes the movable rod lose extrusion force and resets and inserts the accommodating groove under the action of the limiting spring, then the cross-shaped block of one end of the connecting rod is inserted into the cross-shaped hole of another connecting rod, and the slider is loosened, and under the reset action of the spring, the movable rod is inserted into the hole again, and the two connecting rods are connected, increase the force arm and assist rotation, solve the problem of laborious rotation, and improve the cover opening operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A three-dimensional view of the iron barrel cover opening device is provided for the utility model;

[0027] Figure 2 An unlocking block structure diagram of the iron barrel cover opening device is provided for the utility model;

[0028] Figure 3 A linkage rod structure diagram of the iron barrel cover opening device is provided for the utility model.

[0029] LEGEND:

[0030] 1, connecting rod one;2, connecting rod two;3, antiskid ring;4, unlocking rod;5, unlocking block;6, reset spring one;7, connecting plate;8, movable rod one;9, cross-shaped block;10, cross-shaped hole;11, linkage rod;12, slider;13, accommodating groove;14, movable rod two;15, limiting plate;16, limiting spring;17, sliding slot;18, reset spring two. DETAILED DESCRIPTION

[0031] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0032] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application. Figure 1 Figure 2 The present application provides an embodiment: a device for opening a lid of an iron bucket, comprising a connecting rod one 1, the connecting rod one 1 is made of metal material, can bear the torsion and tension applied in the process of opening the bucket lid, its function is to serve as the main operating rod, connecting the unlocking block 5, and transmitting the rotating force applied by the worker to the unlocking block 5 to realize the opening operation of the bucket lid, the side wall of the connecting rod one 1 is provided with a connecting rod two 2, the material of the connecting rod two 2 is the same as that of the connecting rod one 1, and it also has good strength and rigidity. The connecting rod two 2 provides another operating mode for opening different types of bucket lids, when a large lid needs to be opened, it is connected with the unlocking rod 4 to complete the operation, the outer wall of the connecting rod one 1 and the connecting rod two 2 is fixedly connected with a plurality of anti-skid rings 3, the anti-skid rings 3 are made of rubber, the function of the anti-skid rings 3 is to increase the friction force when the worker holds the connecting rod one 1 and the connecting rod two 2, to prevent the hands from slipping during operation, the anti-skid rings 3 are distributed in an array, one end of the connecting rod one 1 is fixedly connected with the unlocking block 5, the function of the unlocking block 5 is to insert into the small lid inside the raw material bucket, to realize the unlocking and opening of the small lid through the interaction with the inner wall of the small lid, one end of the connecting rod two 2 is fixedly connected with the left-right symmetrical unlocking rod 4, the function of the unlocking rod 4 is to be clamped into the large lid, to interact with the protruding part of the inner wall of the large lid, when the connecting rod two 2 is rotated, the large lid is driven to rotate, thereby realizing the opening of the large lid, the unlocking block 5 is provided with a fitting assembly inside;

[0033] ​The fitting assembly comprises a plurality of movable rods 8, which are adapted to the shape and size of the inner wall of the small cover and closely contact the inner wall of the small cover when the unlocking block 5 is inserted into the small cover, thereby increasing the friction and connection stability between the unlocking block 5 and the small cover. The movable rods 8 are arranged in an array on the left and right sides of the unlocking block 5. The outer walls of the movable rods 8 are slidably connected to the inside of the unlocking block 5. The bottom of each movable rod 8 is fixedly connected to a connecting plate 7. The connecting plate 7 plays a role in force transmission when the movable rod 8 is extruded or reset. The outer wall of the connecting plate 7 is slidably connected to the inside of the unlocking block 5. The side wall of the connecting plate 7 is provided with a reset spring 6. When the movable rod 8 is extruded and retracted by the inner wall of the small cover, the reset spring 6 stores elastic potential energy. When the unlocking block 5 is inserted into the small cover, the elastic potential energy is released, and the movable rod 8 and the connecting plate 7 are displaced outward, so that one end of the movable rod 8 closely contacts the inner wall of the cover, thereby increasing the connection strength between the unlocking block 5 and the small cover. One end of the reset spring 6 is fixedly connected to the side wall of the connecting plate 7, and the other end of the reset spring 6 is fixedly connected to the inside of the unlocking block 5.

[0034] Specifically, when producing in the workshop, the barrel cover of the raw material barrel needs to be quickly opened to deliver the material to the equipment hopper. When the small cover of the raw material barrel needs to be opened, the worker holds the connecting rod 1, aligns the unlocking block 5 at one end of the connecting rod 1 with the opening of the small cover, and inserts the unlocking block 5 into the inside of the cover. During the insertion process, the plurality of movable rods 8 on the side wall of the unlocking block 5 first contact the inner wall of the cover. Since the inner wall of the cover exerts an inward extrusion force on the movable rods 8, the movable rods 8 retract into the inside of the unlocking block 5 under the action of the extrusion force. The retraction of the movable rods 8 causes the connecting plate 7 fixedly connected to the bottom of the movable rods 8 to also displace. During the displacement of the connecting plate 7, the reset spring 6 on the side wall of the connecting plate 7 is compressed, and the elastic potential energy is continuously increased. When the unlocking block 5 is completely inserted, there will be a certain gap between the outer wall of the unlocking block 5 and the inner wall of the cover. At this time, the reset spring 6 begins to release the elastic potential energy stored before, and pushes the connecting plate 7 to displace linearly in the direction of the outer edge of the unlocking block 5. The displacement of the connecting plate 7 drives the movable rods 8 fixedly connected thereto to also displace outward. Finally, one end of the movable rods 8 closely contacts the inner wall of the cover, so that the unlocking block 5 and the small cover form a relatively close connection. At this time, the worker rotates the connecting rod 1 again. The rotation of the connecting rod 1 drives the unlocking block 5 fixedly connected thereto to rotate, and drives the cover to rotate. With the rotation of the cover, the connection between the small cover and the barrel body gradually loosens, thereby completing the opening of the small cover.

[0035] When the large cover needs to be opened, the staff holds the connecting rod two 2, aims the unlocking rod 4 at one end of the connecting rod two 2 at the inside of the large cover, and the staff inserts the unlocking rod 4 into the inside of the large cover, so that the outer wall of the unlocking rod 4 is in close contact with the protruding part of the inner wall of the large cover, then the staff rotates the connecting rod two 2 again, the rotation of the connecting rod two 2 drives the unlocking rod 4 fixedly connected therewith to rotate, due to the interaction between the outer wall of the unlocking rod 4 and the protruding part of the inner wall of the large cover, the rotation of the unlocking rod 4 drives the rotation of the large cover, with the rotation of the large cover, the connection between the large cover and the barrel body is gradually loosened, and then the opening of the large cover is completed, so that the effect of quickly opening two different shapes of barrel covers is achieved.

[0036] With reference to Figure 3The outer wall of the connecting rod two 2 is provided with a sliding groove 17, the sliding groove 17 is a groove formed by machining during the manufacturing process of the connecting rod two 2, and the sliding groove 17 provides a sliding track for the sliding block 12. The sliding groove 17 is located at the side of the cross-shaped block 9, and the sliding block 12 is slidably connected to the inner wall of the sliding groove 17. The sliding block 12 serves as a linkage component and drives other components to move under the pushing of the staff. The sliding block 12 is located inside the connecting rod one 1, and the linkage rod 11 is fixedly connected to the bottom of the sliding block 12. The linkage rod 11 is used for transmitting the displacement force of the sliding block 12 and driving other components to move. The linkage rod 11 is slidably connected to the inside of the cross-shaped block 9. The linkage rod 11 is provided with a reset spring two 18 at the bottom. The reset spring two 18 stores elastic potential energy after the linkage rod 11 is displaced by external force, and releases the elastic potential energy when the external force disappears, so as to push the linkage rod 11 to reset and restore the device to the initial state. One end of the reset spring two 18 is fixedly connected to the bottom of the linkage rod 11, and the other end of the reset spring two 18 is fixedly connected to the inside of the cross-shaped block 9. The linkage rod 11 is provided with a plurality of accommodating grooves 13. The accommodating grooves 13 provide storage space for the movable rod two 14 during specific operation, and cooperate with the movable rod two 14 to switch the connection state of the connecting rod one 1 and the connecting rod two 2. The linkage rod 11 is provided with a plurality of movable rods two 14, which are distributed in a circumferential array in the inside of the cross-shaped block 9. The outer wall of the movable rod two 14 is slidably connected to the inside of the cross-shaped block 9. The outer wall of the movable rod two 14 is fixedly connected with a limiting plate 15. The limiting plate 15 limits the displacement range of the movable rod two 14, and assists the movable rod two 14 to realize displacement and reset under the action of the limiting spring 16. The outer wall of the limiting plate 15 is slidably connected to the inner wall of the cross-shaped block 9. The limiting plate 15 is provided with a limiting spring 16 at the side wall. The limiting spring 16 stores elastic potential energy when the movable rod two 14 is extruded and retracted by the linkage rod 11, and releases the elastic potential energy when the linkage rod 11 is displaced and the movable rod two 14 loses the extrusion force, so as to push the limiting plate 15 and the movable rod two 14 to reset, and ensure that the movable rod two 14 can accurately cooperate with the accommodating groove 13 or the inner hole of the cross-shaped hole 10. One end of the limiting spring 16 is fixedly connected to the side wall of the limiting plate 15, and the other end of the limiting spring 16 is fixedly connected to the inside of the cross-shaped block 9.

[0037] Specifically, when the connecting rod one 1 or the connecting rod two 2 rotates in the uncapping operation, the force arm is not enough, and the rotating is laborious, at this time, the worker can push the slider 12 at one end of the connecting rod two 2 with his hand, the slider 12 linearly displaces along the track of the sliding groove 17 under the pushing force of the worker, the displacement of the slider 12 drives the forward displacement of the linkage rod 11 fixedly connected thereto, in the process of the forward displacement of the linkage rod 11, the reset spring two 18 at the bottom thereof is forced to compress, and the elastic potential energy continuously increases, at the same time, the displacement of the linkage rod 11 synchronously displaces the accommodating groove 13, the displacement of the accommodating groove 13 makes the movable rod two 14 originally extruded by the outer wall of the linkage rod 11 lose the extrusion force, at this time, the limiting spring 16 releases the elastic potential energy and pushes the limiting plate 15 to displace, the displacement of the limiting plate 15 drives the reset of the movable rod two 14 fixedly connected thereto, and finally the movable rod two 14 is inserted into the accommodating groove 13, at this time, the worker aligns the cross-shaped block 9 at one end of the connecting rod two 2 with the cross-shaped hole 10 at one end of the connecting rod one 1, and then inserts the cross-shaped block 9 into the cross-shaped hole 10, then the worker releases the slider 12, the reset spring two 18 releases the elastic potential energy and pushes the linkage rod 11 to displace under the reset force, and returns to the initial position, the displacement of the linkage rod 11 also returns to the original position, with the reset of the linkage rod 11, the movable rod two 14 is extruded and extended again, and the top thereof is inserted into the hole position in the cross-shaped hole 10, the top of the movable rod two 14 is tightly fitted with the hole position in the cross-shaped hole 10, so as to complete the connection of the connecting rod one 1 and the connecting rod two 2, at this time, the two connecting rods are connected as a whole, the force arm is increased, and the rotating can be more labor-saving, and the effect of increasing the force arm and assisting the rotation is achieved. When the connecting rod one 1 and the connecting rod two 2 need to be separated, the worker slides the slider 12 forward again, repeats the above operation, and makes the movable rod two 14 retract into the accommodating groove 13, so as to pull out the cross-shaped block 9 from the cross-shaped hole 10, and realize the separation of the two connecting rods.

[0038] Working principle: in the workshop production, the required raw material bucket cover is quickly opened, the material is transported to the equipment hopper, when the small cover of the raw material bucket needs to be opened, the worker inserts the unlocking block 5 at one end of the connecting rod 1 into the inside of the cover, at this time, the plurality of movable rods 8 on the side wall of the unlocking block 5 are extruded by the inner wall of the cover, and then are retracted into the inside of the unlocking block 5, and drive the connecting plate 7 to compress the movable rods 8, when the insertion is completed, there is a gap between the outer wall of the unlocking block 5 and the inner wall of the cover, at this time, the movable rods 8 are reset to push the connecting plate 7 and the movable rods 8 to displace outward, one end of the movable rods 8 is in close contact with the inner wall of the cover, at this time, the worker rotates the connecting plate 7 again, drives the unlocking block 5 to rotate, and then drives the cover to rotate, so as to complete the opening of the small cover, when the large cover needs to be opened, the worker inserts the unlocking rod 4 at one end of the connecting rod 2 2 into the inside of the large cover, the outer wall of the unlocking rod 4 contacts the protruding part of the inner wall of the large cover, and then the connecting rod 2 2 is rotated again, the large cover is driven to rotate by the unlocking rod 4, and then the opening of the large cover is completed, so as to achieve the effect of quickly opening two different shapes of bucket covers, when the connecting rod 1 or the connecting rod 2 2 is rotated in the cover opening operation, the force arm is not enough, and the rotation is laborious, the worker first slides the slider 12 at one end of the connecting rod 2 2 forward, the displacement of the slider 12 drives the linkage rod 11 to displace forward, so that the reset spring 2 18 is compressed under force, and at the same time, the accommodating groove 13 is also displaced synchronously, the displacement of the accommodating groove 13 makes the movable rod 2 14, which is originally extruded by the outer wall of the linkage rod 11 and then stretched out, lose the extrusion force, under the action of the limiting spring 16, the limiting plate 15 pushes the movable rod 2 14 to reset, and then the bottom of the movable rod 2 14 is inserted into the accommodating groove 13, at this time, the cross-shaped block 9 at one end of the connecting rod 2 2 is inserted into the cross-shaped hole 10 at one end of the connecting rod 1, then the slider 12 is loosened, under the resetting force of the reset spring 2 18, the linkage rod 11 and the accommodating groove 13 return to the original position, the movable rod 2 14 is extruded and stretched out again, and the top thereof is inserted into the hole position in the cross-shaped hole 10, so as to complete the connection of the connecting rod 1 and the connecting rod 2 2, and achieve the effect of increasing the force arm and assisting the rotation.

[0039] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A device for opening an iron barrel lid, comprising a connecting rod (1), characterized in that: The connecting rod one (1) is provided with a connecting rod two (2) on its side wall. Multiple anti-slip rings (3) are fixedly connected to the outer walls of both the connecting rod one (1) and the connecting rod two (2). The anti-slip rings (3) are arranged in an array. One end of the connecting rod one (1) is fixedly connected with an unlocking block (5). One end of the connecting rod two (2) is fixedly connected with left and right symmetrical unlocking rods (4). The unlocking block (5) is provided with a fitting component inside. The fitting assembly includes multiple movable rods (8), which are arranged in an array on the left and right sides inside the unlocking block (5). The outer walls of the movable rods (8) are slidably connected to the inside of the unlocking block (5). A connecting plate (7) is fixedly connected to the bottom of each movable rod (8). The outer walls of the connecting plate (7) are slidably connected to the inside of the unlocking block (5). A reset spring (6) is provided on the side wall of each connecting plate (7). One end of the reset spring (6) is fixedly connected to the side wall of the connecting plate (7), and the other end of the reset spring (6) is fixedly connected to the inside of the unlocking block (5).

2. The device for opening an iron drum lid according to claim 1, characterized in that: A cross-shaped block (9) is fixedly connected to the side wall of the second connecting rod (2), and a cross-shaped hole (10) is opened on the side wall of the first connecting rod (1). The outer wall of the cross-shaped block (9) is slidably connected to the inner wall of the cross-shaped hole (10).

3. The device for opening an iron drum lid according to claim 2, characterized in that: The outer wall of the connecting rod 2 (2) is provided with a sliding groove (17), which is located on the side of the cross-shaped block (9).

4. The device for opening an iron drum lid according to claim 3, characterized in that: The inner wall of the groove (17) is slidably connected to a slider (12), which is located inside the connecting rod (1).

5. The device for opening an iron drum lid according to claim 4, characterized in that: The bottom of the slider (12) is fixedly connected to a linkage rod (11), the outer wall of the linkage rod (11) is slidably connected to the inside of the cross-shaped block (9), a second reset spring (18) is provided at the bottom of the linkage rod (11), one end of the second reset spring (18) is fixedly connected to the bottom of the linkage rod (11), and the other end of the second reset spring (18) is fixedly connected to the inside of the cross-shaped block (9), and multiple receiving grooves (13) are opened on the outer wall of the linkage rod (11).

6. The device for opening an iron drum lid according to claim 5, characterized in that: The outer wall of the linkage rod (11) is provided with a plurality of movable rods (14), which are arranged in a circular array inside the cross-shaped block (9). The outer wall of the movable rods (14) is slidably connected to the inside of the cross-shaped block (9).

7. The device for opening an iron drum lid according to claim 6, characterized in that: The outer walls of the two movable rods (14) are all fixedly connected to limit plates (15), and the outer walls of the limit plates (15) are all slidably connected to the inner walls of the cross-shaped block (9).

8. The device for opening an iron drum lid according to claim 7, characterized in that: Each of the side walls of the limiting plate (15) is provided with a limiting spring (16). One end of each limiting spring (16) is fixedly connected to the side wall of the limiting plate (15), and the other end of each limiting spring (16) is fixedly connected to the inside of the cross-shaped block (9).

Images