A reinforcing structure for a rear cover
By setting reinforcements and limiting sleeves on the inner bottom of the rear cover body, the problem of poor fixing effect of traditional rear covers is solved, and stable rotation of the shaft and long service life of the equipment are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU GUANYU MECHANICAL & ELECTRICAL TECH CO LTD (CHINA)
- Filing Date
- 2025-09-28
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional back covers use plastic to encase the shaft, which has limited fixing effect, causing the shaft to swing under centrifugal force. In severe cases, this can lead to shaft breakage or back cover cracking, affecting the service life of the equipment.
The back cover body adopts a U-shaped cylindrical structure, with screw holes and circular plate-shaped reinforcing members on the inner bottom, and limiting cylinders and support plates on the outer side. The reinforcing members are fixed by bolts to enhance the structural strength of the back cover and limit and guide the axis.
The overall structural strength of the back cover is improved, ensuring that the shaft remains stable during rotation, avoiding deviation or shaking, and extending the service life of the equipment.
Smart Images

Figure CN224533073U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of pump accessories, and more specifically, it relates to a structural design for a reinforced rear cover. Background Technology
[0002] In the composition of various equipment such as motors and pumps, the back cover is an indispensable key component. It mainly undertakes the important responsibilities of sealing the internal space of the equipment, preventing the intrusion of external dust and impurities, and protecting the internal core components. At the same time, it also provides a foundation for the installation of the shaft.
[0003] The current pump rear cover still has the following shortcomings:
[0004] Traditional back covers are made of plastic directly covering the shaft. They rely solely on the strength of the plastic, which has limited effect on fixing the shaft. During pump operation, the shaft will swing under centrifugal force. In severe cases, the shaft may break or the back cover may crack due to insufficient strength. This cannot meet the needs of high-intensity use and affects the service life of the equipment. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides a reinforced back cover structure to address the issue mentioned in the background art where the traditional back cover is made of plastic directly covering the shaft, relying solely on the strength of the plastic, which has limited effect on fixing the shaft. During pump operation, the shaft will swing under centrifugal force, which may lead to shaft breakage or the back cover breaking directly due to insufficient strength. This cannot meet the requirements of high-strength use and affects the service life of the equipment.
[0006] The purpose and effect of this utility model's reinforced back cover structure are achieved by the following specific technical means:
[0007] A reinforced back cover structure includes: a back cover body; the back cover body adopts a U-shaped cylindrical structure, and the inner bottom of the back cover body is provided with a screw hole structure in an annular array; a circular plate-shaped reinforcing member is fixedly provided on the inner bottom of the back cover body, and the outer wall of the reinforcing member is in contact with the inner wall of the back cover body; a cylindrical limiting cylinder is fixedly provided in the middle of the front side of the reinforcing member.
[0008] Furthermore, the rear cover body has a cylindrical shaft rotating in the middle, and the outer diameter of the shaft matches the inner diameter of the limiting cylinder.
[0009] Furthermore, the reinforcing member has circular through-holes arranged in a ring array, and the diameter of the through-holes matches the diameter of the screw holes on the inner bottom of the rear cover body.
[0010] Furthermore, both the outer and inner walls of the rear cover body are covered with a covering layer, and the covering layer is made of plastic.
[0011] Furthermore, the bottom inner side of the rear cover body is fixedly provided with arc-shaped plate structure support pieces in a ring array around the perimeter, and each set of support pieces is located on the outer side of the axis.
[0012] Compared with the prior art, the present invention has the following beneficial effects:
[0013] By setting a circular plate-shaped reinforcing member that fits against the inner wall at the bottom inner side of the rear cover body, the overall structural strength of the rear cover body is effectively enhanced, which can better resist the action of external forces and reduce the occurrence of deformation and damage. The limiting cylinder in the middle of the front side of the reinforcing member cooperates with the shaft in the middle of the rear cover body to accurately limit and guide the rotation of the shaft, ensuring that the shaft maintains a stable posture during rotation, avoiding deviation or shaking, ensuring the normal operation of related components of the equipment, and also improving the strength of the shaft during use, which is conducive to extending the overall service life of the equipment.
[0014] The arc-shaped support plates arranged in a ring around the bottom of the inner side of the rear cover body provide effective auxiliary support for the limiting cylinder and the shaft, making the support more uniform and stable, further enhancing the stability of the shaft during rotation, and improving the overall strength of the equipment. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the disassembled structure of the back cover body and the reinforcing member of this utility model.
[0016] Figure 2 This is a side view structural diagram of the back cover body of this utility model.
[0017] Figure 3 This is a side view of the reinforcing member of this utility model.
[0018] Figure 4 This is a cross-sectional view of the rear cover body in the installation state of the reinforcing component of this utility model.
[0019] Figure 5 This is a cross-sectional structural diagram of the reinforcing member of this utility model.
[0020] In the diagram, the correspondence between component names and drawing numbers is as follows:
[0021] 1. Back cover body; 101. Shaft; 102. Reinforcing member; 103. Perforation; 104. Covering layer; 105. Support piece; 106. Limiting cylinder. Detailed Implementation
[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.
[0023] Example 1: As shown in the attached document Figure 1 To be continued Figure 5As shown:
[0024] This utility model provides a reinforced back cover structure, including: a back cover body 1; the back cover body 1 adopts a U-shaped cylindrical structure, and the inner bottom of the back cover body 1 has a screw hole structure in a ring array; a circular plate-shaped reinforcing member 102 is fixedly provided on the inner bottom of the back cover body 1, and the outer wall of the reinforcing member 102 is in contact with the inner wall of the back cover body 1, and the setting of the reinforcing member 102 can significantly improve the overall structural strength of the back cover body 1; a cylindrical limiting cylinder 106 is fixedly provided in the middle of the front side of the reinforcing member 102.
[0025] The rear cover body 1 has a cylindrical shaft 101 rotatably mounted in the middle, and the outer diameter of the shaft 101 matches the inner diameter of the limiting cylinder 106. The matching arrangement of the limiting cylinder 106 and the shaft 101 can effectively limit and guide the rotation of the shaft 101, ensuring that the shaft 101 maintains a stable posture during rotation and avoiding deviation or shaking, thereby ensuring the normal operation of the relevant components of the equipment.
[0026] The reinforcing member 102 has circular through-holes 103 arranged in a ring array, and the diameter of the through-holes 103 matches the diameter of the screw holes on the bottom inner side of the back cover body 1. The reinforcing member 102 can be installed into the interior of the back cover body 1 by the cooperation of the bolts and the through-holes 103.
[0027] The specific usage and function of this embodiment are as follows:
[0028] By using bolts and through holes 103, the reinforcing member 102 is installed to the inner bottom of the rear cover body 1, so that the limiting cylinder 106 is sleeved on the outer side of the shaft 101. The setting of the limiting cylinder 106 can play a good limiting and guiding role for the rotation of the shaft 101, ensuring that the shaft 101 maintains a stable posture during rotation. At the same time, it can also improve the strength of the shaft 101 during use, avoiding deviation or shaking, thereby ensuring the normal operation of the equipment and related components. The setting of each set of support plates 105 can further assist in supporting the limiting cylinder 106 and the shaft 101, thereby further enhancing the stability of the shaft 101 during rotation and improving the overall strength of the equipment.
[0029] Example 2: Based on Example 1, as shown in the appendix Figure 1 To be continued Figure 5 As shown:
[0030] The outer and inner walls of the rear cover body 1 are both covered with a covering layer 104, which is made of plastic. From the perspective of the outer wall, the covering layer 104 can reduce the damage caused by external friction to the rear cover body 1, and can also resist external corrosion to a certain extent. From the perspective of the inner wall, it can prevent direct friction between the rear cover body 1 and the internal components, protect the surface of the internal components from damage, and thus extend the service life of the rear cover body 1 and the internal components of the equipment.
[0031] Among them, the bottom inner side of the rear cover body 1 is fixedly provided with arc-shaped plate structure support plates 105 in a ring array around the perimeter, and each set of support plates 105 is located on the outside of the shaft 101. The support plates 105 can play an auxiliary support role for the shaft 101 and the components related to the shaft 101. The ring array layout makes the support more uniform and stable, further enhancing the stability of the shaft 101 during rotation and reducing the adverse effects on the equipment caused by shaking.
[0032] The specific usage and function of this embodiment are as follows:
[0033] In this utility model, by setting the covering layer 104, from the perspective of the outer wall of the back cover body 1, the covering layer 104 can reduce the damage caused by external friction to the back cover body 1, and at the same time, it can resist external corrosion to a certain extent; from the perspective of the inner wall, it can prevent direct friction between the back cover body 1 and the internal components, protect the surface of the internal components from damage, thereby extending the service life of the back cover body 1 and the internal components of the equipment.
Claims
1. A structural feature for reinforcing a back cover, characterized in that, include: The rear cover body (1) adopts a U-shaped cylindrical structure, and the bottom of the inner side of the rear cover body (1) is provided with a screw hole structure in an annular array; a circular plate-shaped reinforcing member (102) is fixedly provided on the bottom of the inner side of the rear cover body (1), and the outer wall of the reinforcing member (102) is in contact with the inner wall of the rear cover body (1); a cylindrical limiting cylinder (106) is fixedly provided in the middle of the front side of the reinforcing member (102).
2. The structural feature of the reinforced back cover as described in claim 1, characterized in that: The rear cover body (1) has a cylindrical shaft (101) rotatably arranged in the middle, and the outer diameter of the shaft (101) matches the inner diameter of the limiting cylinder (106).
3. The reinforced back cover structure as described in claim 1, characterized in that: The reinforcing member (102) has circular through-holes (103) arranged in a ring array, and the diameter of the through-holes (103) matches the diameter of the screw hole at the bottom of the inner side of the back cover body (1).
4. The structural feature of the reinforced back cover as described in claim 1, characterized in that: The outer and inner walls of the back cover body (1) are covered with a covering layer (104), and the covering layer (104) is made of plastic.
5. The structural feature of the reinforced back cover as described in claim 1, characterized in that: The bottom inner side of the rear cover body (1) is fixedly provided with arc-shaped plate support pieces (105) in a ring array around the bottom, and each set of support pieces (105) is located on the outside of the axis (101).