Shock absorption type water cooling machine

By using shock absorbing mechanisms and sound insulation mechanisms in the water cooler, and using hydraulic rods, shock absorbing springs, rubber rings and sound insulation cotton and other components, the vibration and noise problems of traditional water cooler are solved, achieving more effective shock absorption and noise reduction effects , and facilitate equipment maintenance.

CN222187397UActive Publication Date: 2024-12-17GUANGDONG JIUYANG INTELLIGENT EQUIP CO LTD
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Patent Information

Application Number
CN202420784152.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-15
Publication Date
2024-12-17
Estimated Expiration
2034-04-15

AI Technical Summary

Technical Problem

Traditional water coolers produce greater vibration and noise during operation, which are mainly driven by compressors, and the existing rubber pad shock absorption methods have poor results.

Method used

A shock absorber water cooler is designed, using shock absorber mechanism and sound insulation mechanism, including shock absorber blocks, mounting blocks, support components and sound insulation covers fixed to the bottom of the water cooler, through hydraulic rods, shock absorber springs, rubber rings and sound insulation Cotton and other components reduce the transmission and amplification of vibration and noise.

Benefits of technology

It effectively reduces the vibration of the compressor to the water cooler, reduces noise propagation, and facilitates the maintenance of the compressor.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a shock absorption type water cooling machine, and relates to the field of water cooling machines, the shock absorption type water cooling machine comprises a water cooling machine body, supporting legs are fixed to the four corners of the bottom of the water cooling machine body, a compressor is arranged in the water cooling machine body, a supporting base is fixed to the compressor, and a shock absorption mechanism is arranged between the supporting base and the water cooling machine body; and a sound insulation mechanism is arranged between the compressor and the water cooling machine. The compressor is fixed to the water cooling machine through the damping mechanism, vibration generated by the compressor is transmitted to the supporting base, the supporting base transmits the vibration to the damping mechanism, the damping mechanism conducts damping on the working compressor, when the compressor works, the compressor is covered with the sound insulation mechanism, and the sound insulation mechanism conducts noise reduction on noise generated by working of the compressor; therefore, the possibility that the compressor generates vibration during working and then drives the compressor shell to vibrate together to generate noise can be reduced.
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Description

Technical Field

[0001] The present application relates to the field of water coolers, and in particular to a shock-absorbing water cooler. Background Art

[0002] Water chillers are a commonly used refrigeration equipment, widely used in various industrial and commercial occasions. However, traditional water chillers often produce large vibrations and noise during operation, which not only affects the service life of the equipment, but may also interfere with the surrounding environment.

[0003] The large vibration and noise generated by the water cooler during operation mostly come from the compressor in the water cooler. When the compressor is working in the water cooler, the compressor itself vibrates due to the rotation of the motor, causing the compressor to make noise. The compressor is directly fixed inside the water cooler. When the compressor vibrates, the compressor will drive the water cooler to vibrate together, causing the water cooler to generate large vibration and noise when it is running.

[0004] In order to solve the vibration and noise problems of the water cooler, a layer of rubber pads is usually placed between the supporting base of the compressor and the water cooler when installing and fixing the compressor. The rubber pads are used to buffer the vibrations, prevent the vibrations of the compressor from being transmitted to the water cooler, and reduce the vibrations of the water cooler caused by the compressor. Although the method of directly placing rubber pads between the compressor and the water cooler can achieve a shock-absorbing effect, the effect is poor. Utility Model Content

[0005] The purpose of the present application is to solve the problem proposed in the above background technology that a layer of rubber pad is placed between the supporting base of the compressor and the water cooler, and the rubber pad is used to buffer the vibration, so as to prevent the vibration of the compressor from being transmitted to the water cooler and reduce the vibration of the water cooler caused by the compressor. Although the method of directly placing the rubber pad between the compressor and the water cooler can achieve the shock-absorbing effect, the effect is poor. The present application provides a shock-absorbing water cooler.

[0006] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0007] A shock-absorbing water cooler comprises a water cooler, wherein support legs are fixed at the four corners of the bottom of the water cooler, a compressor is arranged inside the water cooler, a support base is fixed on the compressor, a shock-absorbing mechanism is arranged between the support base and the water cooler, and a sound insulation mechanism is arranged between the compressor and the water cooler.

[0008] By adopting the above technical solution, the compressor is fixed to the water cooler by using a shock-absorbing mechanism, and the shock-absorbing mechanism reduces the vibration of the working compressor. While the compressor is working, the compressor is covered by a sound insulation mechanism, and the sound insulation mechanism reduces the noise generated by the operation of the compressor, thereby reducing the possibility of vibration generated when the compressor is working, and then causing the compressor casing to vibrate and generate noise.

[0009] Furthermore, the shock absorbing mechanism includes a shock absorbing block fixed to the bottom of the water cooler, the shock absorbing block is provided with a shock absorbing groove, a mounting block is arranged in the shock absorbing groove, a supporting assembly is arranged between the mounting block and the shock absorbing block, and a mounting assembly is arranged between the supporting base and the mounting block.

[0010] By adopting the above technical solution, when the compressor drives the supporting base to vibrate, the mounting assembly plays a shock-absorbing role, and then when the vibration is transmitted to the mounting block, the mounting block transmits the vibration to the supporting assembly, and the supporting assembly between the mounting block and the shock-absorbing block plays a shock-absorbing role, thereby reducing the transmission of vibration of the compressor to the water cooler when working, and reducing the vibration of the water cooler when the compressor vibrates to generate noise.

[0011] Furthermore, the support assembly includes four hydraulic rods fixed on the shock-absorbing block in pairs, and a fixed plate is fixed on the telescopic end of the hydraulic rod, and the fixed plate is fixedly connected to the mounting block. A shock-absorbing spring is arranged between the fixed plate and the shock-absorbing block, and both ends of the shock-absorbing spring are fixedly connected to the fixed plate and the shock-absorbing block.

[0012] By adopting the above technical solution, the vibration of the compressor is transmitted to the supporting base, the supporting base transmits it to the mounting block, the mounting block transmits it to the fixed plate, and then the fixed plate transmits the vibration to the shock-absorbing spring. The shock-absorbing spring converts the energy of the vibration generated by the mounting block with the cooperation of the hydraulic rod, thereby reducing the transmission of the vibration generated by the compressor to the water cooler, reducing the possibility of noise generated by the vibration of the compressor and the water cooler together.

[0013] Furthermore, the mounting assembly includes a plurality of fixed rubber rings arranged on the mounting block, the plurality of fixed rubber rings correspond to the support base, the fixed rubber rings are fixedly connected to the mounting block, a fixing nut is fixed on the fixed rubber ring, and the support base and the fixing nut are fixedly connected by bolts.

[0014] By adopting the above technical solution, when the compressor transmits vibration to the support base during operation, the support base transmits the vibration to the bolts and fixing nuts, and the fixed rubber ring wrapped around the bolts and fixing nuts cushions the generated vibration, thereby further reducing the possibility of the compressor transmitting vibration to the water cooler during operation.

[0015] Furthermore, sound insulation cotton is filled between the mounting block and the shock absorbing block.

[0016] By adopting the above technical solution, sound insulation cotton is filled between the mounting block and the shock-absorbing block, thereby reducing the possibility of a cavity between the shock-absorbing block and the mounting block, thereby reducing the possibility of noise amplification, and at the same time absorbing part of the noise generated by the vibration of the mounting block.

[0017] Furthermore, a rubber strip is fixed to the edge of the mounting block, and the rubber strip is located between the mounting block and the shock absorbing groove.

[0018] By adopting the above technical solution, the mounting block drives the rubber block to vibrate, and the rubber block contacts the inner wall of the shock absorbing groove, thereby reducing the entry of foreign matter between the shock absorbing block and the mounting block and reducing the possibility of the mounting block contacting the shock absorbing block when vibrating.

[0019] Furthermore, the sound insulation mechanism includes a sound insulation cover arranged on the compressor, the bottom of the sound insulation cover is open, one end of the sound insulation cover is open, and evenly distributed sound insulation cotton is fixed to the inner wall of the sound insulation cover. A connecting component is arranged between the sound insulation cover and the shock absorbing block.

[0020] By adopting the above technical solution, the sound insulation cover is covered on the compressor, and the noise generated by the operation of the compressor is isolated by the sound insulation cover and the sound insulation cotton on the sound insulation cover, thereby reducing the spread of the noise generated by the compressor when it is working.

[0021] Furthermore, the connecting assembly includes two fixing rods symmetrically fixed on the shock absorbing block, the fixing rods are made of metal, and fixing magnetic strips are fixed on both sides of the sound insulation cover, and the fixing magnetic strips correspond to the fixing rods.

[0022] By adopting the above technical solution, the fixed magnetic strip on the sound insulation cover is used to contact the fixed rod on the shock-absorbing block. The fixed rod is made of metal. The fixed magnetic strip is directly adsorbed on the shock-absorbing block, so that the sound insulation cover is fixed on the shock-absorbing block, so that the sound insulation cover can be easily removed from the compressor, which is convenient for maintenance of the compressor.

[0023] In summary, the present application includes at least one of the following beneficial effects:

[0024] 1. The present application uses bolts to pass through the support base on the compressor when fixing the support base and the mounting block on the compressor, and then directly connects with the fixing nuts in the fixing rubber ring. When the compressor is working, the vibration of the compressor is transmitted to the support base, and the support base transmits the vibration to the bolts and the fixing nuts. The fixing rubber ring wrapped around the bolts and the fixing nuts cushions the generated vibration. When the mounting block vibrates, the mounting block transmits the vibration to the fixed plate, and the fixed plate transmits the vibration to the shock-absorbing spring. The shock-absorbing spring converts the vibration generated by the mounting block into energy with the cooperation of the hydraulic rod, and plays a shock-absorbing role, thereby achieving the purpose of reducing the transmission of the vibration generated by the compressor when it is working to the water cooler, and reducing the possibility of the compressor driving the water cooler to vibrate and generate a large noise.

[0025] 2. In the present application, a sound insulation cover is covered on the compressor by using a fixed rod and a fixed magnetic strip. When the compressor generates noise during operation, the sound insulation cotton fixed on the inner wall of the sound insulation cover absorbs the noise generated. When the compressor needs to be repaired, the sound insulation cover can be directly pulled to separate the fixed magnetic strip on the sound insulation cover from the fixed rod on the shock-absorbing block, so that the compressor can be repaired conveniently, thereby achieving the purpose of reducing the spread of noise when the compressor is working and not delaying the maintenance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a first three-dimensional structural schematic diagram of the water cooler in this application;

[0027] Figure 2 It is a schematic diagram of part of the internal structure of the water-cooling machine in this application;

[0028] Figure 3 is an exploded schematic diagram of the shock absorbing mechanism in the present application;

[0029] Figure 4 This application Figure 3 Enlarged schematic diagram at point A in the middle.

[0030] Description of reference numerals:

[0031] 1. Water cooler; 2. Compressor; 3. Support base; 4. Shock-absorbing mechanism; 41. Shock-absorbing block; 42. Shock-absorbing groove; 43. Mounting block; 44. Support assembly; 441. Hydraulic rod; 442. Shock-absorbing spring; 443. Fixed plate; 45. Mounting assembly; 451. Fixed rubber ring; 452. Fixed nut; 46. Sound insulation cotton 1; 47. Rubber strip; 5. Support leg; 6. Sound insulation mechanism; 61. Sound insulation cover; 62. Sound insulation cotton 2; 63. Connection assembly; 631. Fixed rod; 632. Fixed magnetic strip. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 —4 Provide further details of this application.

[0033] The embodiment of the present application discloses a shock-absorbing water-cooling machine.

[0034] Reference Figure 1 , Figure 2 and Figure 3 A shock-absorbing water cooler includes a water cooler 1, support legs 5 are fixed at the four corners of the bottom of the water cooler 1, a compressor 2 is arranged in the water cooler 1, a support base 3 is fixed on the compressor 2, a shock-absorbing mechanism 4 is arranged between the support base 3 and the water cooler 1, and a sound insulation mechanism 6 is arranged between the compressor 2 and the water cooler 1.

[0035] When the water cooler 1 is in use, the compressor 2 is fixed to the water cooler 1 by means of the shock absorbing mechanism 4. When the compressor 2 of the water cooler 1 is working, vibration is generated. The vibration generated by the compressor 2 is transmitted to the supporting base 3, and the supporting base 3 is transmitted to the shock absorbing mechanism 4. The shock absorbing mechanism 4 performs shock absorption on the working compressor 2. While the compressor 2 is working, the compressor 2 is covered by the sound insulation mechanism 6. The sound insulation mechanism 6 reduces the noise generated by the operation of the compressor 2, thereby reducing the propagation of the noise generated by the operation of the compressor 2. By using the shock absorbing mechanism 4 to connect the supporting base 3 of the compressor 2 with the water cooler 1, when the compressor 2 is working, the shock absorbing mechanism 4 is used to reduce the vibration of the compressor 2, thereby reducing the possibility that the vibration generated by the compressor 2 when working is transmitted to the water cooler 1, and then the outer casing of the compressor 2 is driven to vibrate together to generate noise.

[0036] Reference Figure 2 , Figure 3 and Figure 4 The shock absorbing mechanism 4 includes a shock absorbing block 41 fixed to the bottom of the water cooler 1, a shock absorbing groove 42 is formed on the shock absorbing block 41, a mounting block 43 is arranged in the shock absorbing groove 42, a supporting assembly 44 is arranged between the mounting block 43 and the shock absorbing block 41, and a mounting assembly 45 is arranged between the supporting base 3 and the mounting block 43.

[0037] The support base 3 of the compressor 2 is fixedly connected to the mounting block 43 by using the mounting assembly 45. When the compressor 2 is working, when the compressor 2 drives the support base 3 to vibrate, the mounting assembly 45 plays a shock-absorbing role. Then, when the vibration is transmitted to the mounting block 43, the mounting block 43 transmits the vibration to the support assembly 44. The support assembly 44 between the mounting block 43 and the shock-absorbing block 41 plays a shock-absorbing role. By utilizing the support assembly 44 on the mounting block 43 to play a shock-absorbing role, and then the mounting block 43 vibrates on the shock-absorbing block 41, the support assembly 44 on the shock-absorbing block 41 plays a shock-absorbing role, thereby reducing the transmission of vibration of the compressor 2 to the water cooler 1 when working, and reducing the possibility of the water cooler 1 vibrating and generating noise when the compressor 2 vibrates.

[0038] Reference Figure 2 , Figure 3 and Figure 4 The support assembly 44 includes four hydraulic rods 441 fixed on the shock absorbing block 41, and the hydraulic rods 441 are symmetrical in pairs. A fixed plate 443 is fixed on the telescopic end of the hydraulic rod 441. The fixed plate 443 is fixedly connected to the mounting block 43. A shock absorbing spring 442 is arranged between the fixed plate 443 and the shock absorbing block 41. Both ends of the shock absorbing spring 442 are fixedly connected to the fixed plate 443 and the shock absorbing block 41.

[0039] When the compressor 2 generates vibration during operation, the vibration of the compressor 2 is transmitted to the support base 3, the support base 3 transmits the vibration to the mounting block 43, the mounting block 43 transmits the vibration to the fixed plate 443, and then the fixed plate 443 transmits the vibration to the shock-absorbing spring 442. The shock-absorbing spring 442 converts the energy of the vibration generated by the mounting block 43 with the cooperation of the hydraulic rod 441. When the mounting block 43 vibrates, the vibration of the mounting block 43 is converted by the shock-absorbing spring 442 and the hydraulic rod 441, thereby reducing the vibration generated by the compressor 2 from being transmitted to the water cooler 1, thereby reducing the possibility of the compressor 2 and the water cooler 1 vibrating together to generate noise.

[0040] Reference Figure 2 , Figure 3 and Figure 4 The mounting assembly 45 includes a plurality of fixed rubber rings 451 disposed on the mounting block 43, the plurality of fixed rubber rings 451 correspond to the support base 3, the fixed rubber rings 451 are fixedly connected to the mounting block 43, a fixing nut 452 is fixed on the fixed rubber ring 451, and the support base 3 and the fixing nut 452 are fixedly connected by bolts.

[0041] When fixing the support base 3 on the compressor 2 and the mounting block 43, bolts are used to pass through the support base 3 on the compressor 2, and then directly connected to the fixing nuts 452 in the fixing rubber ring 451. When the compressor 2 is working and transmits vibration to the support base 3, the support base 3 transmits the vibration to the bolts and the fixing nuts 452, and the fixing rubber ring 451 wrapped around the bolts and the fixing nuts 452 buffers the generated vibration. When the compressor 2 drives the support base 3 to vibrate, the fixing rubber ring 451 has a shock-absorbing effect on the support base 3, thereby further reducing the possibility of the compressor 2 transmitting the vibration to the water cooler 1 when working.

[0042] Reference Figure 2 and Figure 3 A sound insulation cotton 46 is filled between the mounting block 43 and the shock absorbing block 41 .

[0043] Furthermore, a rubber strip 47 is fixed to the edge of the mounting block 43 , and the rubber strip 47 is located between the mounting block 43 and the shock absorbing groove 42 .

[0044] When the compressor 2 is working and drives the mounting block 43 to vibrate, the sound insulation cotton 46 absorbs the noise generated by the mounting block 43 in the shock absorbing block 41, thereby reducing the propagation of noise generated by the vibration of the mounting block 43. Then, when the mounting block 43 vibrates, the mounting block 43 drives the rubber block to vibrate, and the rubber block contacts the inner wall of the shock absorbing groove 42, thereby reducing the entry of foreign matter between the shock absorbing block 41 and the mounting block 43, thereby reducing the possibility of the mounting block 43 contacting the shock absorbing block 41 when vibrating. By using the sound insulation cotton 46 to fill the space between the mounting block 43 and the shock absorbing block 41, and then fixing the rubber strip 47 on the edge of the mounting block 43, the propagation of noise generated by the vibration of the mounting block 43 can be reduced, thereby further reducing the possibility of the mounting block 43 transmitting the vibration to the shock absorbing block 41.

[0045] Reference Figure 2 , Figure 3 and Figure 4 The sound insulation mechanism 6 includes a sound insulation cover 61 arranged on the compressor 2, the bottom of the sound insulation cover 61 is open, one end of the sound insulation cover 61 is open, and evenly distributed sound insulation cotton 62 is fixed on the inner wall of the sound insulation cover 61. A connecting component 63 is arranged between the sound insulation cover 61 and the shock absorbing block 41.

[0046] In addition, the connecting component 63 includes two fixing rods 631 symmetrically fixed on the shock absorbing block 41 , the fixing rods 631 are made of metal, and fixing magnetic strips 632 are fixed on both sides of the sound insulation cover 61 , and the fixing magnetic strips 632 correspond to the fixing rods 631 .

[0047] When the compressor 2 is working, the sound insulation cover 61 is covered on the compressor 2, and the fixed magnetic strip 632 on the sound insulation cover 61 is used to contact the fixed rod 631 on the shock-absorbing block 41. The fixed rod 631 is made of metal. The fixed magnetic strip 632 is directly adsorbed on the shock-absorbing block 41, so that the sound insulation cover 61 is fixed on the shock-absorbing block 41. When the compressor 2 generates noise during operation, the sound insulation cotton 62 fixed on the inner wall of the sound insulation cover 61 absorbs the generated noise. When the compressor 2 needs to be repaired, the sound insulation cover 61 can be directly pulled to separate the fixed magnetic strip 632 of the sound insulation cover 61 from the fixed rod 631 on the shock-absorbing block 41. By using the sound insulation cover 61 to directly cover the compressor 2, the sound insulation cotton 62 on the sound insulation cover 61 isolates and absorbs the noise generated by the vibration of the compressor 2, thereby reducing the propagation of noise when the compressor 2 is working.

[0048] Working principle: when fixing the support base 3 on the compressor 2 and the mounting block 43, a bolt is used to pass through the support base 3 on the compressor 2, and then directly connected to the fixing nut 452 in the fixing rubber ring 451, and then the sound insulation cover 61 is covered on the compressor 2 by using the fixing rod 631 and the fixing magnetic strip 632. When the compressor 2 is working, the vibration of the compressor 2 is transmitted to the support base 3, and the support base 3 transmits the vibration to the bolt and the fixing nut 452. The fixing rubber ring 451 wrapped around the bolt and the fixing nut 452 buffers the generated vibration. Then, when the mounting block 43 vibrates, the mounting block 43 transmits the vibration to the fixing plate 443, and then the fixing plate 443 transmits the vibration to the shock-absorbing spring 442. The shock-absorbing spring 442 is on the hydraulic rod 44. 1, the vibration generated by the mounting block 43 is converted into energy to play a shock-absorbing role. Then, when the compressor 2 is working and generating noise, the sound insulation cover 61 is covered on the compressor 2, and the fixed magnetic strip 632 on the sound insulation cover 61 is used to contact the fixed rod 631 on the shock-absorbing block 41. The fixed rod 631 is made of metal. The fixed magnetic strip 632 is directly adsorbed on the shock-absorbing block 41, so that the sound insulation cover 61 is fixed on the shock-absorbing block 41. When the compressor 2 is working and generating noise, the sound insulation cotton 62 fixed on the inner wall of the sound insulation cover 61 absorbs the generated noise. When the compressor 2 needs to be repaired, the sound insulation cover 61 can be directly pulled to separate the fixed magnetic strip 632 on the sound insulation cover 61 from the fixed rod 631 on the shock-absorbing block 41, so that the compressor 2 can be repaired conveniently.

Claims

1. A shock-absorbing water cooler, comprising a water cooler (1), characterized in that: Support legs (5) are fixed at the four corners of the bottom of the water cooler (1), a compressor (2) is arranged in the water cooler (1), a support base (3) is fixed on the compressor (2), a shock absorbing mechanism (4) is arranged between the support base (3) and the water cooler (1), and a sound insulation mechanism (6) is arranged between the compressor (2) and the water cooler (1).

2. A shock-absorbing water-cooling machine according to claim 1, characterized in that: The shock absorbing mechanism (4) comprises a shock absorbing block (41) fixed to the bottom of the water cooler (1), the shock absorbing block (41) being provided with a shock absorbing groove (42), a mounting block (43) being arranged in the shock absorbing groove (42), a supporting assembly (44) being arranged between the mounting block (43) and the shock absorbing block (41), and a mounting assembly (45) being arranged between the supporting base (3) and the mounting block (43).

3. A shock-proof water-cooling machine according to claim 2, characterized in that: The support assembly (44) comprises four hydraulic rods (441) fixed on the shock absorbing block (41) in pairs, a fixed plate (443) being fixed on the telescopic end of the hydraulic rod (441), the fixed plate (443) being fixedly connected to the mounting block (43), a shock absorbing spring (442) being arranged between the fixed plate (443) and the shock absorbing block (41), and both ends of the shock absorbing spring (442) being fixedly connected to the fixed plate (443) and the shock absorbing block (41).

4. A shock-proof water-cooling machine according to claim 2, characterized in that: The mounting assembly (45) comprises a plurality of fixed rubber rings (451) arranged on the mounting block (43), the plurality of fixed rubber rings (451) corresponding to the support base (3), the fixed rubber rings (451) being fixedly connected to the mounting block (43), a fixing nut (452) being fixed to the fixed rubber ring (451), and the support base (3) and the fixing nut (452) being fixedly connected by bolts.

5. The shock-absorbing water-cooling machine according to claim 2, characterized in that: Sound insulation cotton (46) is filled between the mounting block (43) and the shock absorbing block (41).

6. The shock-absorbing water-cooling machine according to claim 2, characterized in that: A rubber strip (47) is fixed to the edge of the mounting block (43), and the rubber strip (47) is located between the mounting block (43) and the shock absorbing groove (42).

7. The shock-absorbing water-cooling machine according to claim 2, characterized in that: The sound insulation mechanism (6) comprises a sound insulation cover (61) arranged on the compressor (2), the bottom of the sound insulation cover (61) is open, one end of the sound insulation cover (61) is open, evenly distributed sound insulation cotton (62) is fixed to the inner wall of the sound insulation cover (61), and a connecting component (63) is arranged between the sound insulation cover (61) and the shock absorbing block (41).

8. The shock-absorbing water-cooling machine according to claim 7, characterized in that: The connection assembly (63) comprises two fixing rods (631) symmetrically fixed on the shock absorbing block (41), the fixing rods (631) being made of metal, and fixing magnetic strips (632) are fixed on both sides of the sound insulation cover (61), the fixing magnetic strips (632) corresponding to the fixing rods (631).