Buffer and roller cage shoe

Abstract

The utility model discloses a buffer and a roller cage shoe, the buffer included in the roller cage shoe comprises: a cylinder body having a barrel-shaped structure, the opening of which is provided with an internal thread; the matched cylinder seat is provided with a lower shaft ring; the cylinder body is made of a non-magnetic material; the lower permanent magnet is positioned at the bottom of the cylinder body; the lining is arranged in the cylinder body in a sleeving manner, and the lining and the cylinder body are coaxial; the lower end of the lining abuts against the upper surface of the lower permanent magnet. The compression nut is matched with the internal thread so as to compress the upper end surface of the bushing; the compression nut is made of a non-magnetic material and is provided with a central via hole; the push rod is inserted into the cylinder body through the central via hole, one end, inserted into the cylinder body, of the push rod is guided to the bushing and is provided with an upper permanent magnet, and the lower end of the upper permanent magnet and the upper end of the lower permanent magnet have the same polarity; and one end of the push rod outside the cylinder body is provided with an upper collar. The buffer provided by the embodiment of the utility model is compact in structure and relatively good in reliability.

Description

Technical Field

[0001] The utility model relates to a buffer used for a roller tank ear and also relates to a roller tank ear equipped with the buffer. Background Art

[0002] Figure 5 The roller can ear shown has the basic structure of a traditional roller can ear, which includes a base 27, a rocker arm 31, a roller 32 and a buffer 29, wherein the base 27 is also called a lower bracket, and the main body is generally a plate structure. Two pin seats are generally provided on the base 27. Since the side where the roller 32 is located is generally called the front side, that is, the side where the roller can ear cooperates with the can channel, the side where the buffer 29 is located is correspondingly called the rear side, thereby providing a force for pressing the roller 32 on the can channel, and generating a buffer based on its elasticity, similar to the shock absorbing system of a vehicle. Based on this orientation, the two pin seats mentioned above can be divided into a front pin seat and a rear pin seat.

[0003] Among them, the rocker arm 31 is also called the upper bracket, and its structure can be Figure 5 The L-shaped structure shown in the figure can also be a vertical rod structure. The main reason for adopting the L-shaped structure is that the initial angle between the buffer 29 and the base 27 is close to 90°. If a vertical rod structure is adopted, the buffer 29 needs to be tilted forward and hinged to the rear side of the upper end of the rocker arm 31.

[0004] Furthermore, one end of the rocker arm 31 is hinged to the front pin seat through the third pin assembly 33, and the lower end of the buffer 29 is hinged to the rear pin seat through the first pin assembly 28. In addition, the upper end of the aforementioned buffer 29 is hinged to the upper end of the rocker arm 31 through the second pin assembly 30, thereby forming a hinged four-bar linkage. Anyone with a little common sense can understand that, for example, the vehicle shock absorber works in real time during the operation of the vehicle. Similarly, in the field of roller can ear technology, the buffer 29 also works in real time during the operation of the roller can ear. At this time, Figure 1 The push rod composed of the adjusting nut 11 and the screw rod 12 shown in the figure will reciprocate in real time to buffer the vibration of the roller 32 during operation.

[0005] The components used by traditional buffers to produce elastic functions are disc spring groups, which are prone to fatigue fracture during frequent buffering actions, and gradually make the buffer ineffective. In view of this, Chinese patent document CN108861951A discloses a magnetic suspension type roller can ear, and the magnetic suspension is achieved by the buffer of this type of roller can ear. In this patent document, the buffer is composed of an oil cylinder structure, which must include a cylinder body and an end cover, as well as a piston head matched with the cylinder body and a piston rod installed on the piston head, wherein a preload spring is provided between the piston head and the end cover. Furthermore, a first electromagnet group is also provided in the oil cylinder, and the first electromagnet group includes a first disc spring and a first electromagnet, and the first disc spring is between the first electromagnet and the piston head, that is, the first electromagnet is connected to the piston head through the first disc spring. A second electromagnet group is also provided in the oil cylinder, and the second electromagnet group includes a second disc spring and a second electromagnet. Correspondingly, the second electromagnet is connected to the lower end cover or the cylinder seat of the oil cylinder through the second disc spring, so that the relative magnetic poles of the two electromagnets have the same polarity, and mutual repulsion will occur when the two are close to each other.

[0006] Based on the above description, it can be known that in the Chinese patent document CN108861951A, both disc springs and non-contact electromagnets are included. The existence of disc springs will inevitably produce mechanical contact, and the problem of disc springs being prone to failure has not been solved. While the use of electromagnets to generate magnetism can certainly adjust the magnetic flux according to needs, such as the current, but it should be known that since the electromagnets in this patent document also need to produce reciprocating motion based on buffering, the routing of the electromagnets will be greatly affected. Once the power is cut off due to wear, it will cause a direct collision between the two electromagnets, which is easy to damage the electromagnets and there is a risk of electric shock. This patent document adopts a composite buffering method, the overall structure is relatively complex, and the axial length of the buffer is not easy to control. Utility Model Content

[0007] The purpose of the utility model is to provide a buffer with a compact structure and relatively good reliability. Another purpose of the utility model is to provide a roller tank ear equipped with the buffer.

[0008] According to a first aspect of an embodiment of the utility model, a buffer is provided, which is used as a buffer of a roller tank ear, and the buffer comprises:

[0009] The cylinder body has a cylinder seat at the lower end thereof, and forms a barrel-shaped structure, and the barrel mouth has an internal thread; the cylinder seat has a lower shaft ring; the cylinder body is made of non-magnetic material;

[0010] The lower permanent magnet is located at the bottom of the cylinder;

[0011] A bushing, which is inserted into the cylinder body and is coaxial with the cylinder body; the lower end of the bushing is pressed against the upper surface of the lower permanent magnet;

[0012] A clamping nut cooperates with the internal thread to clamp the upper end surface of the bushing; the clamping nut is made of non-magnetic material and has a central through hole;

[0013] The push rod is inserted into the cylinder body through the central through hole, and one end inserted into the cylinder body is guided by the bushing and equipped with an upper permanent magnet, the lower end of the upper permanent magnet has the same polarity as the upper end of the lower permanent magnet; the end of the push rod outside the cylinder body has an upper shaft ring.

[0014] Optionally, the bushing is selected from:

[0015] Nylon bushing;

[0016] The base body is a rigid body, and the inner hole of the sleeve has a bushing with a polytetrafluoroethylene coating;

[0017] Metal wear bushing; or

[0018] Linear bearings.

[0019] Optionally, the connection between the push rod and the upper permanent magnet is based on magnetic attraction and / or mechanical connection.

[0020] Optionally, the mechanical connection is a bolt connection.

[0021] Optionally, the central through hole is provided with a sealing member.

[0022] Optionally, the central via hole has a groove, and an outer end of the central via hole has a countersunk hole;

[0023] The sealing member comprises a Y-shaped oil seal disposed in the groove;

[0024] A skeleton dustproof ring is arranged in the countersunk hole.

[0025] Optionally, a first set screw hole is opened on the side of the barrel mouth;

[0026] Accordingly, a first set screw is provided to lock the compression nut after the compression nut is tightened into place.

[0027] Optionally, the push rod comprises an outer shell and an inner rod nested in the outer shell;

[0028] Correspondingly, a locking device is provided on the push rod for locking the positions of the inner rod and the outer rod after the inner rod is adjusted into place relative to the outer rod.

[0029] Optionally, the inner rod is a solid rod body or a tube body;

[0030] The inner rod is a screw rod;

[0031] The outer sleeve is correspondingly a screw sleeve;

[0032] The locking device is a second set screw structure.

[0033] According to a second aspect of an embodiment of the utility model, a roller tank ear is provided, and the roller tank ear includes the buffer described in the first aspect of the embodiment of the utility model.

[0034] In the embodiment of the utility model, the content improved relative to the prior art is the buffer, and the remaining parts of the roller can ear of the second aspect of the embodiment of the utility model can adopt the existing structure or construction. Among them, the buffer only uses one way to achieve buffering, that is, using permanent magnets for buffering. On the one hand, due to the reduction of the number of components used, the overall structure is relatively compact. On the other hand, due to the use of permanent magnets, there is no need to arrange cables, and there is no need to consider the problem of permanent magnet failure due to power failure or cable damage, for example. It should be known that the main demagnetization reason of permanent magnets is heat, but it is difficult to reach the demagnetization temperature of the magnet (also known as Curie temperature, such as the Curie temperature of rubidium magnets is 320~380℃, affected by various factors, the demagnetization temperature distribution range of the same magnet is usually relatively large) under the working state of the buffer, so its working reliability is relatively good. In addition, from the assembly point of view, the lower permanent magnet is pressed by the bushing, and the upper permanent magnet is fixed on the push rod, and the push rod is guided by the bushing, so that the upper and lower permanent magnets are accurately aligned, and the assembly reliability is also relatively good. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the main cross-sectional structure of a buffer in one embodiment.

[0036] Figure 2 An exploded view of a buffer in one embodiment.

[0037] Figure 3 It is a schematic diagram of the main cross-sectional structure of the adjusting nut in one embodiment.

[0038] Figure 4 for Figure 3 AA section view.

[0039] Figure 5 It is a schematic diagram of the left view of the structure of the roller tank ear in one embodiment.

[0040] Figure 6 It is a schematic diagram of the right section structure of the roller tank ear in one embodiment.

[0041] In the figure: 1. Lower shaft ring, 2. Lower shaft bushing, 3. Lower ring hole, 4. Cylinder body, 5. Lower permanent magnet, 6. Wear-resistant bushing, 7. Guide hole, 8. Upper permanent magnet, 9. Thread pair, 10. Pressing nut, 11. Adjusting nut, 12. Screw, 13. Upper ring hole, 14. Upper shaft ring, 15. Upper shaft bushing, 16. Set screw, 17. External skeleton rubber dustproof oil seal, 18. Y-type oil seal for sealing groove, 19. Set screw, 20. Flange, 21. Threaded hole, 22. Hexagonal column section, 23. Cylindrical head, 24. Chamfer, 25. Set screw hole, 26. Cylindrical section, 27. Base, 28. First pin assembly, 29. Buffer, 30. Second pin assembly, 31. Rocker arm, 32. Roller, 33. Third pin assembly, 34. Assembly hole, 35. Rubber wheel, 36. Wheel hub, 37. Bearing cover assembly, 38. Roller shaft, 39. Tapered roller bearing, 40. Bearing chamber. DETAILED DESCRIPTION

[0042] The basic positions of the roller can ears have been described in the previous article and are common knowledge in the field and will not be repeated here.

[0043] Regarding the roller can ear, in addition to the content described in the background technology part, a brief description is given. Figure 6 In the figure, the roller 32 of the roller tank ear is mounted on the rocker arm 31 by means of two-end support, but in this field, it is more common to use a single-end support connection, that is, one end of the roller shaft 38 is fixedly mounted on the rocker arm 31 and the other end is cantilevered.

[0044] Since the focus of the improvement of the present invention is the structure or construction of the buffer 29, the rest of the roller tank ear does not have any structural or construction changes due to the improvement of the buffer 29. Therefore, the rest of the roller tank ear will not be described in detail.

[0045] The main function of the buffer 29 is to provide buffering, so it should include a buffer part and a connecting part, the connecting part includes the cylinder 4 and the push rod assembly, for the convenience of description, the push rod assembly is referred to as the push rod. The buffer part in the embodiment of the utility model only uses permanent magnets to distinguish it from the solution of the prior art that must use a disc spring group.

[0046] The cylinder body 4 includes a cylinder and a cylinder seat, and the cylinder seat seals the cylinder from the lower end to form a barrel-shaped structure, that is, a cylinder with a bottom at one end. Figure 1 It can be seen that the connection between the cylinder and the cylinder seat is welding, and the structural reliability is relatively good.

[0047] Furthermore, from Figure 1As can be seen from the illustrated structure, the barrel mouth of the cylinder body 4 has an internal thread, which is included in the thread pair 9 shown in the figure. Another component of the thread pair 9 is the clamping nut 10 shown in the figure. Accordingly, the clamping nut 10 has an external thread.

[0048] In the figure, the cylinder seat has a lower shaft ring 1, which is used for the buffer to pass through Figure 5 The first pin assembly 28 shown in the figure is installed on the rear pin seat of the base 27 and has the freedom of swinging.

[0049] The cylinder body 4 is made of non-magnetic material. In order to ensure strength and rigidity, it is still made of steel, but it uses austenitic stainless steel, which is not magnetized and has other properties of steel, such as weldability.

[0050] The function of the clamping nut 10 is to seal the barrel opening from the upper end. The clamping nut 10 and the cylinder body 4 are detachable to facilitate the maintenance of the buffer 29.

[0051] Press nut 10 from Figure 1 As can be seen in the figure, there is a central via hole, which is a light hole. In some implementations, the central via hole can also be provided with a sealing thread for sealing.

[0052] In addition, as can be seen in the figure, the central through hole can also be a stepped hole with a countersunk hole located at the upper end of the central through hole. A groove is also provided in the middle of the central through hole for installing a sealing ring.

[0053] Correspondingly, a dust ring is arranged in the counterbore, and an oil seal is arranged in the groove.

[0054] Among them, the dustproof ring adopts a skeleton dustproof ring, such as Figure 1 The outer skeleton rubber dustproof oil seal 17 shown in the figure; and the oil seal provided in the groove also adopts a skeleton oil seal, such as Figure 1 The sealing groove shown in FIG. 1 is provided with a Y-type oil seal 18 .

[0055] As for the permanent magnet, what is called a strong magnet is preferable, such as an iron boron magnet and other strong magnets.

[0056] Considering that corrosion is also one of the reasons for demagnetizing the magnet, the surface of the permanent magnet used in the embodiment of the utility model has a protective coating. In the case where there is no mechanical friction on the permanent magnet, it can be ensured that the buffer 29 has a longer service life.

[0057] exist Figure 1 In the illustrated structure, the lower permanent magnet 5 is located at the bottom of the cylinder 4. Since the cylinder 4 is made of non-magnetic material, the lower permanent magnet 5 needs to be fixed in other ways. Figure 1In the illustrated structure, a wear-resistant bushing 6 is used in combination with a clamping nut 10 for fixing. The fixing method is as follows:

[0058] First, place the lower permanent magnet 5 at the bottom of the cylinder body 4. The lower permanent magnet 5 is a ring-shaped or annular magnet. It can be clearance-fitted or transition-fitted with the cylinder body 4, or a fitting gap can be left. The fitting gap should not exceed 3mm on one side.

[0059] Furthermore, the wear-resistant bushing 6 is placed in the cylinder body 4, and the lower end of the wear-resistant bushing 6 is pressed on the upper surface of the lower permanent magnet 5. The wear-resistant bushing 6 is of course also made of non-magnetic material. It should also be known that generally, the more wear-resistant materials are generally non-magnetic materials, such as tin bronze, nylon, etc.

[0060] In order to ensure strict alignment, an interference fit can be used between the wear-resistant bushing 6 and the cylinder body 4. The interference fit is relatively difficult to install, so a transition fit or a clearance fit is used in a more preferred embodiment. The interference fit can make the wear-resistant bushing 6 and the cylinder body 4 have a better coaxiality, and the transition fit and clearance fit can still meet the relatively ideal coaxiality between the wear-resistant bushing 6 and the cylinder body 4.

[0061] The clamping nut 10 presses the upper end of the wear-resistant bushing 6 from the upper end, thereby restricting the lower permanent magnet 5 to the bottom of the cylinder body 4.

[0062] Although the wear-resistant liner 6 will thus shield the main part of the lower permanent magnet 5, it should be understood that for a circular magnet, its magnetic flux is relatively large in the middle and relatively small at the periphery, and the wear-resistant liner 6 partially pressing the lower permanent magnet 5 has little effect on the lower permanent magnet 5.

[0063] The upper electromagnet 8 is installed at the lower end of the push rod. The push rod can be made of ferromagnetic material, such as 45 steel, Q235 steel, etc. The upper electromagnet 8 is adsorbed on the lower end of the push rod, and can also be further fixed to the lower end of the push rod using screws or bolts.

[0064] The lower end of the push rod is provided with a flange 20, the diameter of which is larger than the diameter of the central through hole, so as to prevent the push rod from falling out.

[0065] At the same time, a friction pair is formed between the flange 20 and the wear-resistant bushing 6 , and the diameter of the upper permanent magnet 8 mounted on the flange 20 can be smaller than that of the flange 20 to avoid wear of the upper permanent magnet 8 .

[0066] The upper permanent magnet 8 and the lower permanent magnet 5 have the same polarity at opposite ends, thereby generating a buffering capability.

[0067] The push rod is inserted into the cylinder body 4 through the central through hole, and the inserted end has the flange 20, so as to form a better limit.

[0068] Correspondingly, an upper collar 14 is provided at the upper end of the push rod. Figure 5 As shown, the buffer 29 is hingedly connected to the rocker arm 31 by using the second pin assembly 30 with the help of the upper shaft collar 14 .

[0069] As for the upper collar 14 and the lower collar 1, sliding friction is adopted between the corresponding pin shaft components, so Figure 1 In the illustrated structure, an upper shaft bushing 15 is inlaid in the upper ring hole 13 of the upper shaft ring 14, and a lower shaft bushing 2 is correspondingly provided in the lower shaft ring 1. The upper shaft bushing 15 and the lower shaft bushing 2 can be made of metal bushings with relatively good wear resistance such as copper bushings, or non-metal bushings such as nylon bushings.

[0070] The same selection can be made for the wear-resistant bushing 6, that is, a non-metallic nylon bushing, a metallic material such as a bronze bushing, or a finished linear bearing to provide rolling friction.

[0071] In some embodiments, a rigid substrate may be provided, such as an aluminum sleeve of a non-ferromagnetic metal, and polytetrafluoroethylene may be sprayed on the inner surface of the aluminum sleeve to form a polytetrafluoroethylene coating.

[0072] Regarding linear bearings, copper-based inlaid graphite self-lubricating bearings (copper H62) are preferred.

[0073] Since the roller tank ear is a device with relatively violent vibration, the main reason for the failure of the thread pair 9 includes vibration. In order to prevent loosening, a first set screw hole is opened on the side of the barrel mouth, thereby providing Figure 1 The set screw 19 shown in the figure locks the thread pair 9 from the side.

[0074] Note: Set screws are commonly known as top screws, and they have good anti-loosening properties.

[0075] Figure 1 In the embodiment, the push rod comprises an outer sleeve and an inner sleeve nested in the outer sleeve; this nested structure is used to adjust the length of the push rod, thereby adjusting the pre-pressure to suit the situation on site.

[0076] Correspondingly, the push rod is provided with a locking device for locking the positions of the inner rod and the outer rod after the inner rod is adjusted to the right position. The locking method also adopts a set screw structure, such as Figure 1 The set screw 16 shown in the figure is used to lock the inner rod after the outer sleeve is adjusted into place.

[0077] In order to facilitate adjustment and ensure good bonding between the outer sleeve and the push rod, the inner rod is a screw rod 12 and the outer sleeve is a threaded sleeve, and the two cooperate to form a thread adjustment structure. As long as the thread adjustment structure adopts a self-locking thread, the length of the push rod formed has relatively good stability. Then, the set screw 16 is used to lock it, and the overall assembly reliability is relatively good.

[0078] When adjusting, you need to loosen the set screw 16 and then turn the screw sleeve to make the adjustment. Figure 1 In the illustrated structure, the screw sleeve is marked as the adjustment nut 11, and in order to facilitate its adjustment, as shown in FIG. Figure 3 and Figure 4 The upper portion of the adjusting nut 11 has a hexagonal column section 22 to facilitate adjustment with the aid of a spanner.

[0079] In the figure, the upper end of the hexagonal column section 22 also has a cylindrical head 23 to facilitate the opening of a set screw hole 25.

Claims

1. A buffer used as a buffer for a roller tank ear, characterized in that: The buffer comprises: The cylinder body has a cylinder seat at the lower end thereof, and forms a barrel-shaped structure, and the barrel mouth has an internal thread; the cylinder seat has a lower shaft ring; the cylinder body is made of non-magnetic material; The lower permanent magnet is located at the bottom of the cylinder; A bushing, which is inserted into the cylinder body and is coaxial with the cylinder body; the lower end of the bushing is pressed against the upper surface of the lower permanent magnet; A clamping nut cooperates with the internal thread to clamp the upper end surface of the bushing; the clamping nut is made of non-magnetic material and has a central through hole; The push rod is inserted into the cylinder body through the central through hole, and one end inserted into the cylinder body is guided by the bushing and equipped with an upper permanent magnet, the lower end of the upper permanent magnet has the same polarity as the upper end of the lower permanent magnet; the end of the push rod outside the cylinder body has an upper shaft ring.

2. The buffer according to claim 1, characterized in that The bushing is selected from: Nylon bushing; The base body is a rigid body, and the inner hole of the sleeve has a bushing with a polytetrafluoroethylene coating; Metal wear bushing; or Linear bearings.

3. The buffer according to claim 1, characterized in that The connection between the push rod and the upper permanent magnet is based on magnetic attraction and / or mechanical connection.

4. The buffer according to claim 3, characterized in that The mechanical connection is a bolt connection.

5. The buffer according to claim 1, characterized in that The central through hole is provided with a sealing member.

6. The buffer according to claim 5, characterized in that The center via has a groove, and the outer end of the center via has a countersunk hole; The sealing member comprises a Y-shaped oil seal disposed in the groove; A skeleton dustproof ring is arranged in the countersunk hole.

7. The buffer according to claim 1, characterized in that A first set screw hole is provided on the side of the barrel mouth; Accordingly, a first set screw is provided to lock the compression nut after the compression nut is tightened into place.

8. The buffer according to claim 1 or 7, characterized in that: The push rod comprises an outer sleeve and an inner rod nested in the outer sleeve; Correspondingly, a locking device is provided on the push rod for locking the positions of the inner rod and the outer rod after the inner rod is adjusted into place relative to the outer rod.

9. The buffer according to claim 8, characterized in that The inner rod is a solid rod body or a tube body; The inner rod is a screw rod; The outer sleeve is correspondingly a screw sleeve; The locking device is a second set screw structure.

10. A roller can ear, characterized in that: A buffer comprising any one of claims 1 to 9.

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