An anticorrosive nanocoating bearing

Abstract

The application relates to the technical field of bearings and discloses an anti-corrosion nano-coating bearing, which comprises a support, a rolling mechanism arranged in the support, a sealing mechanism arranged on the surface of the rolling mechanism, mounting mechanisms arranged on the two sides of the surface of the support, and the mounting mechanisms being symmetrically arranged. The anti-corrosion nano-coating bearing is provided with the sealing mechanism which is convenient to install and dismount, and has obvious advantages. In the equipment with poor working environment such as construction machinery and mine machinery, a large amount of dust, soil, sand particles and other solid particles exist around. Once the impurities enter the bearing, the wear degree of the bearing raceway, rolling body and retainer and other parts is directly increased. With the continuous increase of the wear, the precision of the bearing is greatly reduced, and the service life is also seriously shortened. The sealing device can effectively prevent the invasion of the impurities, and the bearing is like wearing a layer of solid protective armor, so that the normal operation of the bearing is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of bearings, in particular to an anti-corrosion nano-coating bearing. BACKGROUND

[0002] Rolling bearings are bearings that rely on rolling elements to roll within raceways to achieve relative movement, and have the advantages of small friction coefficient, small starting resistance, high efficiency, high precision, etc. Common rolling bearings include deep groove ball bearings, angular contact ball bearings, tapered roller bearings and cylindrical roller bearings. Sliding bearings are bearings that work under sliding friction, which reduce friction and wear by forming a layer of lubricating oil film between the shaft neck and the bearing seat. Sliding bearings have the advantages of large load capacity, stable operation, no noise and impact resistance, and are suitable for high-speed, heavy-load and high-precision applications. Nano-lubricant is a lubricant mainly composed of nanomaterials. Compared with traditional lubricants, nano-lubricant has higher lubrication performance, longer service life and wider application range, and can effectively reduce the wear of the surface of the friction pair and improve the service life of the rolling bearing.

[0003] Patent No. CN 210371683 U discloses a bearing, comprising a plurality of concave bearing blocks and a bearing seat for fixing the plurality of concave bearing blocks; each of the plurality of concave bearing blocks is provided with a concave portion for mutual splicing to form a cylindrical inner cavity, and further comprising a circular ring sliding sheet sleeved in the cylindrical inner cavity. The bearing has simple structure, convenient manufacturing and low cost.

[0004] The applicant believes that the bearing has the following disadvantages: the surface of the bearing is not provided with a seal, and if there is no seal, the internal lubricating grease will be gradually thrown out of the bearing gap due to centrifugal force, vibration and other factors during operation, resulting in a decrease in the amount of lubricating grease and the inability to form an effective lubricating film, thereby increasing the friction of the bearing and affecting the normal use of the bearing, and reducing the use effect of the bearing. SUMMARY

[0005] The application aims to provide an anti-corrosion nano-coating bearing to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: an anti-corrosion nano-coating bearing, comprising a support, wherein the support is provided with a rolling mechanism inside, the surface of the rolling mechanism is provided with a sealing mechanism, the surface of the support is provided with a mounting mechanism on both sides, and the mounting mechanisms are symmetrically arranged.

[0007] The sealing mechanism comprises a seal, the seal surface is fixedly connected with a fixed ring, the fixed ring surface is fixedly connected with a connecting plate, the side of the connecting plate away from the fixed ring is fixedly connected with a limiting piece, a circular hole groove is formed in the limiting piece, a limiting rod is inserted into the circular hole groove, the surface of the limiting rod is provided with a thread, and the surface of the limiting rod is threadedly connected with a locking nut.

[0008] Preferably, the number of limiting rods is several, the several limiting rods are evenly distributed in a ring shape, and the lengths of the several limiting rods are consistent. In the design and manufacturing process of the bearing, in order to ensure the effectiveness and stability of the seal, the limiting rod is specially arranged. The limiting rod is usually made of high-strength and wear-resistant metal material, and is reasonably arranged on the periphery of the bearing sealing structure through a precise installation process. When the sealing assembly is installed on the bearing, the limiting rod can play a unique role in preliminarily limiting the seal. It cooperates with the specific clamping groove or protruding part on the sealing piece to limit the displacement range of the sealing piece to a certain extent, so that the sealing piece can be kept in the correct position in the initial installation state, preventing the sealing piece from being offset or skewed during installation, thereby laying a foundation for subsequent good sealing effect. In this way, even before the bearing is formally put into operation, the seal is preliminarily fixed in the ideal position under the action of the limiting rod, effectively improving the reliability of the entire bearing sealing system.

[0009] Preferably, the surface of the fixed ring is fixedly connected with a connecting block, a limiting groove is formed in the connecting block, and a support is inserted into the limiting groove. The support is arranged on the sealing side. In the entire bearing sealing protection system, the support and the connecting block play a key role. The support is usually made of high-strength and good toughness alloy material. Its shape is carefully designed, generally in the form of a block structure with a specific curvature, so as to better fit the contour of the bearing. These supports are precisely installed in the specific position near the seal inside the bearing seat, and are firmly connected with the bearing seat through a firm fixing mode.

[0010] Preferably, the rolling mechanism comprises an outer ring, the limiting rod is fixedly connected to the side surface of the outer ring, the support is fixedly connected to the outer surface of the outer ring, and the connecting plate is arranged on one side of the outer ring and is responsible for bearing the load transmitted to the bearing from the outside, including radial load and axial load. These loads may come from the running parts of the machine equipment, external forces, etc. The outer ring needs to have sufficient strength and rigidity to bear these forces, so as to ensure the stability and reliability of the bearing and the entire equipment.

[0011] Preferably, the outer ring is connected with rolling elements, the surface of the rolling elements is connected with a retainer, the side of the rolling elements away from the outer ring is fixedly connected with an inner ring, the retainer is arranged between the inner ring and the outer ring, the rolling elements can bear the radial load of the bearing and evenly distribute the load between the inner ring and the outer ring of the bearing.

[0012] Preferably, the number of the rolling elements is several, and the several rolling elements are arranged in an equidistant annular manner.

[0013] Preferably, the mounting mechanism comprises a horizontal plate fixedly connected to the both sides of the surface of the support, a mounting plate fixedly connected to the surface of the horizontal plate, a fixed block fixedly connected to the side of the mounting plate away from the horizontal plate, a fixed bolt threadedly connected in the fixed block, the fixed bolt is arranged horizontally, and the number of the fixed bolts arranged in a threaded manner is two, and the two fixed bolts are arranged symmetrically.

[0014] Preferably, the both sides of the surface of the support are fixedly connected with connecting pieces, the connecting pieces penetrate through the fixed bolts, and the connecting pieces are arranged on one side of the horizontal plate; by rotating the fixed bolts in the connecting pieces, the fixed bolts are fixedly connected with the surface of the external fixed object, thereby stably supporting the support, ensuring that the bearing remains stable during subsequent operation, and providing a solid foundation for the normal operation of the equipment.

[0015] Compared with the prior art, the anti-corrosion nano-coated bearing has the following beneficial effects:

[0016] 1. The anti-corrosion nano-coated bearing is provided with a sealing mechanism, which is convenient to install and disassemble, has obvious advantages, and is suitable for use in equipment with harsh working environments such as construction machinery and mining machinery, where a large amount of dust, soil, sand particles and other solid particles exist around the equipment. Once these impurities enter the bearing, they will directly accelerate the wear of the bearing raceway, rolling elements and retainer, etc. With the continuous increase of wear, the precision of the bearing will be greatly reduced, and the service life will also be seriously shortened. The sealing device can effectively prevent the invasion of these impurities, like a layer of solid protective armor for the bearing, ensuring its normal operation.

[0017] 2. This corrosion-resistant nano-coated bearing, through its designed rolling mechanism, operates based on the characteristics of rolling friction. When the shaft begins to rotate, the inner ring, which is tightly fitted to the shaft, also rotates synchronously. The rolling elements continuously roll on the raceway between the inner and outer rings. Since the coefficient of rolling friction is much smaller than the coefficient of sliding friction, the shaft can rotate with a smaller frictional torque. This not only reduces energy loss but also improves mechanical efficiency. Taking automotive wheel hub bearings as an example, it is precisely because of the proper application of rolling bearings that the wheels can maintain smooth rotation, effectively reducing fuel consumption during vehicle operation and improving energy utilization efficiency.

[0018] 3. This corrosion-resistant nano-coated bearing, through its installation mechanism, allows the internal fixing bolts to be tightly fixed to the surface of the external fixture by rotating them, thus providing stable support for the support and ensuring that the bearing remains stable during subsequent operation, providing a solid foundation for the normal operation of the equipment.

[0019] 4. This anti-corrosion nano-coated bearing, by coating the bearing surface with an anti-corrosion nano-coating, has extremely small particle size and high specific surface area, which can form a uniform and dense protective film on the bearing surface. This effectively blocks the contact between corrosive media such as air, moisture, acids and alkalis and the bearing substrate, thereby significantly improving the bearing's corrosion resistance. For example, in some humid or chemically corrosive industrial environments, such as electroplating workshops and offshore operating platforms, bearings coated with anti-corrosion nano-coatings can resist the erosion of chloride ions, acid mist, etc., and avoid rust and corrosion damage, thus playing a very good protective role for the bearing. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the sealing mechanism of the present invention;

[0024] Figure 4 This is a schematic diagram of the rolling mechanism of the present invention;

[0025] Figure 5A separation schematic diagram of the rolling mechanism of the application;

[0026] Figure 6 A schematic diagram of the mounting mechanism of the application.

[0027] In the figure: 1, support; 2, sealing mechanism; 21, support piece; 22, limiting rod; 23, fixed ring; 24, seal; 25, limiting piece; 26, limiting groove; 27, connecting block; 28, connecting plate; 3, rolling mechanism; 31, inner ring; 32, retainer; 33, rolling body; 34, outer ring; 4, mounting mechanism; 41, connecting piece; 42, fixed bolt; 43, cross plate; 44, mounting plate; 45, fixed block. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0029] The application provides a technical solution: Embodiment one:

[0030] In combination with Figures 1-2 to Figure 3 An anti-corrosion nano-coating bearing, comprising a support 1, a rolling mechanism 3 arranged in the support 1, a sealing mechanism 2 arranged on the surface of the rolling mechanism 3, a mounting mechanism 4 arranged on both sides of the surface of the support 1, and the mounting mechanisms 4 are symmetrically arranged.

[0031] The sealing mechanism 2 comprises a seal 24, the surface of the seal 24 is fixedly connected with a fixed ring 23, the surface of the fixed ring 23 is fixedly connected with a connecting plate 28, the side, away from the fixed ring 23, of the connecting plate 28 is fixedly connected with a limiting piece 25, a circular hole groove is arranged in the limiting piece 25, a limiting rod 22 is inserted into the circular hole groove, the surface of the limiting rod 22 is provided with a thread, a locking nut is threadedly connected with the surface of the limiting rod 22, and the surface of the locking nut is tightly attached to the surface of a support piece 21.

[0032] Further, the number of limiting rods 22 is several, and the several limiting rods 22 are distributed in an equidistant annular manner, and the lengths of the several limiting rods 22 are consistent. In the design and manufacturing process of the bearing, in order to ensure the effectiveness and stability of the seal 24, the limiting rods 22 are specially arranged. The limiting rods 22 are usually made of high-strength and wear-resistant metal materials, and are reasonably arranged on the periphery of the bearing seal 24 structure through precise installation process. When the seal 24 assembly is installed on the bearing, the limiting rods 22 can play a unique role in preliminarily limiting the seal 24. Through the cooperation with the specific clamping grooves or protruding parts on the seal 24, the displacement range of the seal 24 is limited to a certain extent, so that the seal 24 can be kept in the correct position in the initial installation state, preventing the seal 24 from being deviated or skewed during the installation process, thereby laying a foundation for realizing good sealing 24 effect. In this way, even before the bearing is formally put into operation, the seal 24 has been preliminarily fixed in the ideal position under the action of the limiting rods 22, effectively improving the reliability of the entire bearing seal 24 system.

[0033] Further, the surface of the fixing ring 23 is fixedly connected with a connecting block 27, the connecting block 27 is provided with a limiting groove 26, and the supporting piece 21 is inserted into the limiting groove 26. The supporting piece 21 is arranged on one side of the seal 24. In the entire bearing seal 24 protection system, the supporting piece 21 and the connecting block 27 play a key role. The supporting piece 21 is usually made of high-strength and good toughness alloy material, and its shape is carefully designed, generally in the form of a block structure with a specific curvature, so as to better fit the shape contour of the bearing. These supporting pieces 21 are accurately installed at the specific position near the seal 24 inside the bearing seat, and are tightly connected with the bearing seat through a firm fixing mode. Embodiment two:

[0034] Reference Figures 4-5And on the basis of example one, further get sealing mechanism 2 including seal 24, the surface of seal 24 is fixedly connected with fixed ring 23, the surface of fixed ring 23 is fixedly connected with connecting plate 28, the side of connecting plate 28 away from fixed ring 23 is fixedly connected with limiting piece 25, the circular hole groove is opened in limiting piece 25, limiting rod 22 is inserted into the circular hole groove, the surface of limiting rod 22 is provided with screw thread, locking nut is connected with the surface of limiting rod 22 screw thread, locking nut is tightly attached to the surface of support 21, the number of limiting rod 22 is set to be several, several limiting rod 22 are distributed in equidistant annular, the length of several limiting rod 22 is consistent, in the design and manufacturing process of bearing, in order to ensure the effectiveness and stability of seal 24, limiting rod 22 is specially set, limiting rod 22 is usually made of high-strength and wear-resistant metal material, through accurate installation process, is reasonably arranged in the periphery of bearing seal 24 structure, when seal 24 assembly is installed on the bearing, limiting rod 22 can play its unique role, and preliminarily limits seal 24, it cooperates with the specific clamping groove or protruding part on seal 24 piece, limits the displacement range of seal 24 piece to a certain extent, so that seal 24 piece can be kept in the correct position in the initial installation state, prevents it from deviating, skewing and other conditions in the installation process, thereby laying a foundation for subsequent good seal 24 effect, in this way, even before the bearing is formally put into operation, seal 24 is preliminarily fixed in the ideal position under the action of limiting rod 22, effectively improves the reliability of the entire bearing seal 24 system

[0035] Further, the rolling mechanism 3 includes an outer ring 34, the limiting rod 22 is fixedly connected to the side surface of the outer ring 34, the support 21 is fixedly connected to the outer surface of the outer ring 34, and the connecting plate 28 is arranged on one side of the outer ring 34, which is responsible for bearing the load transmitted to the bearing from the outside, including radial load and axial load. These loads may come from the running parts of the machine equipment, external forces, etc. The outer ring 34 needs to have sufficient strength and rigidity to withstand these forces to ensure the stability and reliability of the bearing and the entire equipment.

[0036] Further, the outer ring 34 is rolling connected with the rolling body 33, the surface of the rolling body 33 is rolling connected with the retainer 32, the side of the rolling body 33 away from the outer ring 34 is fixedly connected with the inner ring 31, the retainer 32 is arranged between the inner ring 31 and the outer ring 34, and the rolling body 33 can bear the radial load of the bearing and evenly distribute the load between the inner ring 31 and the outer ring 34 of the bearing. Taking the automobile hub bearing as an example, when the vehicle is running, the weight of the wheel and various forces from the road to the wheel will generate radial load, and the rolling body 33 is responsible for reasonably transmitting and distributing these forces between the hub (corresponding to the bearing outer ring 34) and the axle (corresponding to the bearing inner ring 31), thereby ensuring the stability of the vehicle running, and the number of rolling bodies 33 is several, and the several rolling bodies 33 are arranged in an equidistant annular distribution. Example three:

[0037] Referring to Figure 6 , and on the basis of example one and example two, the rolling mechanism 3 further includes an outer ring 34, a limiting rod 22 is fixedly connected to the side of the outer ring 34, a supporting piece 21 is fixedly connected to the outer surface of the outer ring 34, a connecting plate 28 is arranged on one side of the outer ring 34, and is responsible for bearing the load transmitted to the bearing from the outside, including radial load and axial load. These loads may come from the running parts of the machine equipment, external forces, etc., and the outer ring 34 needs to have sufficient strength and rigidity to bear these forces, so as to ensure the stability and reliability of the bearing and the entire equipment. The outer ring 34 is rolling connected with the rolling body 33, the surface of the rolling body 33 is rolling connected with the retainer 32, the side of the rolling body 33 away from the outer ring 34 is fixedly connected with the inner ring 31, the retainer 32 is arranged between the inner ring 31 and the outer ring 34, and the rolling body 33 can bear the radial load of the bearing and evenly distribute the load between the inner ring 31 and the outer ring 34 of the bearing. Taking the automobile hub bearing as an example, when the vehicle is running, the weight of the wheel and various forces from the road to the wheel will generate radial load, and the rolling body 33 is responsible for reasonably transmitting and distributing these forces between the hub (corresponding to the bearing outer ring 34) and the axle (corresponding to the bearing inner ring 31), thereby ensuring the stability of the vehicle running, and the number of rolling bodies 33 is several, and the several rolling bodies 33 are arranged in an equidistant annular distribution.

[0038] Further, the mounting mechanism 4 includes a horizontal plate 43, the horizontal plate 43 is fixedly connected to the surfaces of the two sides of the support 1, the surface of the horizontal plate 43 is fixedly connected with a mounting plate 44, the side of the mounting plate 44 away from the horizontal plate 43 is fixedly connected with a fixed block 45, the fixed block 45 is screw connected with a fixed bolt 42, the fixed bolt 42 is arranged horizontally, and the number of the fixed bolts 42 arranged in screw connection is two, and the two fixed bolts 42 are symmetrically arranged.

[0039] Further, the support 1 surface both sides are fixedly connected with connecting piece 41, connecting piece 41 passes through fixed bolt 42, connecting piece 41 is arranged at one side of horizontal plate 43, by rotating the fixed bolt 42 in the inside, make fixed bolt 42 and the surface of the fixed object outside realize the close fixed connection, to the support 1 play the stable support function, ensure that bearing always keeps stable in the subsequent operation process, provide solid foundation guarantee for the normal operation of equipment.

[0040] In actual operation process, when this device uses, first in mechanical equipment, bearing as key component, its performance stability directly influences equipment's operation efficiency and life, in order to ensure that bearing can work normally under various complex working conditions, it is important to carry out effective sealing 24 protection;

[0041] We adopt a unique sealing 24 installation mode, place sealing 24 to both sides of bearing, in the installation process, when support 21 is accurately inserted into the limiting slot 26 inside the connecting block 27, limiting rod 22 can be inserted into the circular hole groove inside limiting piece 25 at this time, then, by thread connection along the surface of limiting rod 22, sealing 24 can be easily and stably installed, the ingenious part of this design is that when sealing 24 appears damage phenomenon, only need to rotate the locking nut reversely, can quickly disassemble and replace it, greatly improve the convenience of maintenance, ensure that sealing 24 is always in normal use state;

[0042] By setting such sealing 24 that is convenient to install and disassemble, its advantage is obvious, in construction machinery, mining machinery and other equipment with poor working environment, a large amount of dust, soil, sand and other solid particles are filled around, once these impurities enter the inside of bearing, will directly aggravate the wear degree of bearing raceway, rolling element 33 and retainer 32 and other parts, with the continuous aggravation of wear, the precision of bearing will be greatly reduced, and the service life will also be seriously shortened, and our sealing 24 device can effectively prevent the invasion of these impurities, like giving bearing a layer of solid protective armor, ensure its normal operation;

[0043] The working principle of bearing in the operation process is based on the characteristics of rolling friction, when the shaft starts to rotate, the inner ring 31 closely matched with the shaft also rotates synchronously, and the rolling element 33 continuously rolls on the raceway between the inner ring 31 and the outer ring 34. Since the rolling friction coefficient is much smaller than the sliding friction coefficient, the shaft can rotate with smaller friction torque when rotating. In this way, not only the energy loss is reduced, but also the mechanical efficiency is improved. Taking the hub bearing of a car as an example, the reasonable application of rolling bearing makes the wheel rotate smoothly during the operation, effectively reduces the fuel consumption during the operation of the car, and improves the energy utilization efficiency.

[0044] In addition, in the installation process of the whole device, when the support 1 needs to be fixed, the operation is also very simple. We can rotate the internal fixing bolt 42 to realize the close fixed connection between the fixing bolt 42 and the surface of the external fixing object, thereby playing a stable supporting role on the support 1, and ensuring that the bearing always remains stable in the subsequent operation process, thereby providing a solid foundation guarantee for the normal operation of the device.

[0045] It should be noted that in this text, relational terms such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual such relationship or order between or among the entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

Claims

1. A corrosion-resistant nano-coated bearing, comprising a support (1), characterized in that: The support (1) is provided with a rolling mechanism (3), the surface of the rolling mechanism (3) is provided with a sealing mechanism (2), and both sides of the surface of the support (1) are provided with an installation mechanism (4), which are arranged symmetrically. The sealing mechanism (2) includes a seal (24), a fixing ring (23) is fixedly connected to the surface of the seal (24), a connecting plate (28) is fixedly connected to the surface of the fixing ring (23), a limiting member (25) is fixedly connected to the side of the connecting plate (28) away from the fixing ring (23), a circular slot is provided in the limiting member (25), a limiting rod (22) is inserted into the circular slot, the surface of the limiting rod (22) is provided with threads, a locking nut is threadedly connected to the surface of the limiting rod (22), and the locking nut is in close contact with the surface of the limiting rod (22). The surface of the fixed ring (23) is fixedly connected with a connecting block (27), and a limiting groove (26) is opened in the connecting block (27). A support member (21) is inserted into the limiting groove (26), and the support member (21) is located on the sealing (24) side. The rolling mechanism (3) includes an outer ring (34), the limiting rod (22) is fixedly connected to the side of the outer ring (34), the support member (21) is fixedly connected to the outer surface of the outer ring (34), and the connecting plate (28) is disposed on one side of the outer ring (34); The installation mechanism (4) includes a horizontal plate (43), which is fixedly connected to both sides of the support (1). A mounting plate (44) is fixedly connected to the surface of the horizontal plate (43). A fixing block (45) is fixedly connected to the side of the mounting plate (44) away from the horizontal plate (43). A fixing bolt (42) is threadedly connected to the fixing block (45). The fixing bolt (42) is arranged horizontally. There are two fixing bolts (42) with threads, and the two fixing bolts (42) are arranged symmetrically.

2. The anti-corrosion nano-coated bearing according to claim 1, characterized in that: The number of limiting rods (22) is several, and the several limiting rods (22) are distributed in a ring with equal spacing, and the length of the several limiting rods (22) is the same.

3. The anti-corrosion nano-coated bearing according to claim 1, characterized in that: A rolling element (33) is rotatably connected inside the outer ring (34), and a cage (32) is rotatably connected to the surface of the rolling element (33). An inner ring (31) is fixedly connected to the side of the rolling element (33) away from the outer ring (34), and the cage (32) is disposed between the inner ring (31) and the outer ring (34).

4. The anti-corrosion nano-coated bearing according to claim 3, characterized in that: The number of rolling elements (33) is several, and the several rolling elements (33) are distributed in a ring with equal spacing.

5. The anti-corrosion nano-coated bearing according to claim 1, characterized in that: Both sides of the support (1) are fixedly connected to connectors (41), the connectors (41) pass through the fixing bolts (42), and the connectors (41) are located on one side of the horizontal plate (43).

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