A waterproof knob for mixer truck control operation panel encoder

Abstract

The utility model relates to waterproof knob technical field, concretely is a kind of waterproof knob for mixer control operation panel encoder, including knob body, sealing connecting piece and panel shell, knob body is installed on panel shell by sealing connecting piece, sealing connecting piece includes rotary connecting component and sealing component, rotary connecting component includes outer ring and inner ring, damping collar and sealing bearing are arranged between outer ring and inner ring up and down, installation groove is set up on panel shell, outer ring drives inner ring to be engaged and fixed in installation groove, sealing component is located the upper end of outer ring and inner ring, knob body includes knob cover, the inside bottom end of knob cover is provided with connecting shaft, connecting shaft is penetrated from inner ring top, and bottom end is limit and engages with the input shaft of encoder on mixer control operation panel, the utility model is convenient to install and dismount, improve the convenience of overhaul, simultaneously, waterproof sealing effect of waterproof knob is good.

Description

Technical Field

[0001] This utility model relates to the field of waterproof knob technology, specifically a waterproof knob for an encoder on a mixer truck control panel. Background Technology

[0002] In concrete mixer truck operations, the encoder on the control panel serves as a core control element, and the performance of its matching knob directly affects the equipment's operating precision and stability. Concrete mixer trucks are often located in open, dusty, and humid environments, and are susceptible to rain, mud splashes, and road bumps during operation. Therefore, the encoder's matching knob must possess reliable waterproof sealing performance and structural stability.

[0003] The encoder knobs used in the control panels of concrete mixer trucks currently on the market generally suffer from three major problems: Firstly, the ease of installation and maintenance is insufficient: most knobs adopt a structure that is directly fixed to the panel housing. Disassembly requires disassembling the entire panel, which is not only time-consuming and laborious, but also easily damages the panel housing, significantly increasing equipment maintenance costs and downtime. Secondly, the waterproof sealing effect is not good: existing knobs mostly rely on a single seal to achieve waterproofing. The sealing structure design is simple and it is difficult to form a comprehensive waterproof barrier. Rainwater and moisture can easily seep in from the connection between the knob and the panel or from the gaps inside the knob, causing the encoder to short circuit or be damaged, affecting the control function of the mixer truck. Third, insufficient structural stability: Some knobs lack a positioning structure at the connection end and directly connect to the encoder input shaft through the housing. Under long-term frequent adjustment or bumpy road conditions, problems such as shaft misalignment and rotation jamming are likely to occur. This not only reduces the control accuracy but also aggravates the wear of the knob and encoder input shaft, shortening the service life. Utility Model Content

[0004] The purpose of this invention is to provide a waterproof knob for the encoder of the control panel of a mixer truck, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waterproof knob for an encoder on a mixer truck control panel, comprising a knob body, a sealing connector, and a panel housing. The knob body is mounted on the panel housing via the sealing connector. The sealing connector includes a rotating connecting component and a sealing component. The rotating connecting component includes an outer ring and an inner ring. A damping collar and a sealing bearing are disposed vertically between the outer ring and the inner ring. An installation groove is provided on the panel housing. The outer ring drives the inner ring to engage and fix within the installation groove. The sealing component is located at the upper end of the outer ring and the inner ring. The knob body includes a knob cover. A connecting shaft is provided at the bottom of the inner end of the knob cover. The connecting shaft passes through the top of the inner ring, and its bottom end engages with the input shaft of the encoder on the mixer truck control panel.

[0006] The present invention is further configured such that the top of the outer ring is provided with a limiting edge and the bottom is provided with a limiting ring, and the mounting groove is provided with a fixing section. The outer ring drives the inner ring to be installed into the mounting groove and is fixed on the fixing section by the limiting edge and the limiting ring. The limiting edge is used to limit the top of the outer ring when it is installed, and the limiting ring is used to limit the bottom of the outer ring when it is installed. The outer ring can be stably installed in the fixing section by the cooperation of the limiting edge and the limiting ring.

[0007] The present invention is further configured such that the sealing component includes a bottom sealing gasket, a top sealing gasket, and a connecting section. The bottom sealing gasket is located at the bottom end of the limiting edge, and the top sealing gasket is located at the top end of the limiting edge, with its inner end fitting against the outer wall of the inner ring. The connecting section is used to integrally connect the outer ends of the top sealing gasket and the bottom sealing gasket. Through the cooperation of the bottom sealing gasket, the top sealing gasket, and the connecting section, a fully sealed connection can be achieved between the sealing connector and the panel housing, as well as between the sealing connector and the knob body, and it is easy to disassemble and replace.

[0008] The present invention is further configured such that a pressing edge is provided inside the knob cover. After the knob body is installed, the pressing edge presses and fixes itself on the top sealing gasket. The knob cover will press down on the top sealing gasket and then press the limiting edge through the top sealing gasket. Then, the limiting edge will press down on the bottom sealing gasket. This can achieve a full seal between the panel housing and the knob cover, and at the same time, it can enhance the sealing effect between the limiting edge and the panel housing, as well as between the knob cover and the limiting edge, thereby improving the overall waterproof performance of the knob body.

[0009] The present invention is further configured such that a locking groove is provided between the pressing edge and the connecting shaft, and a locking protrusion is provided at the bottom of the inner end of the locking groove. A limiting protrusion is provided on the outer side of the top of the inner ring. The locking protrusion and the limiting protrusion engage with each other. After the connecting shaft is inserted into the inner ring, the knob cover is pressed against the top of the inner ring, so that the locking protrusion at the bottom of the locking groove engages with the limiting protrusion on the outer side of the top of the inner ring, thereby realizing the locking connection between the knob cover and the top of the inner ring.

[0010] The present invention is further configured such that a connecting groove is provided at the bottom end of the connecting shaft, and the bottom end of the connecting shaft is engaged with the input shaft of the encoder on the control panel of the mixer truck through the connecting groove. The connecting groove enables the connecting shaft and the input shaft of the encoder to be quickly engaged and connected.

[0011] The present invention is further configured such that a limiting groove is formed on the inner wall of the inner ring, and a limiting slide is provided on the connecting shaft. The limiting slide is slidably engaged with the limiting groove. The cooperation between the limiting slide and the limiting groove can improve the connection stability between the connecting shaft and the inner ring and avoid relative rotational wear between the connecting shaft and the inner ring.

[0012] The present invention is further configured such that a positioning protrusion is provided at the bottom end of the limiting edge, and a positioning groove is provided on the panel housing. The positioning protrusion and the positioning groove are engaged in a limiting fit. Through the cooperation of the positioning protrusion and the positioning groove, the sealing connector can be accurately positioned when installed on the panel housing, thereby improving the installation stability of the sealing connector.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. Convenient installation and easy maintenance: The waterproof knob connects the knob body to the panel housing through a sealing connector, avoiding direct contact between the knob and the panel housing and reducing damage to the housing during disassembly. During installation, the outer ring quickly engages with the panel mounting groove with the limiting edge and the limiting retaining ring, and the knob body slides with the inner ring through the connecting shaft, without the need for complicated tools; during maintenance, the knob and the sealing connector can be directly separated without disassembling the panel, greatly improving maintenance efficiency and reducing equipment maintenance time and labor costs.

[0014] 2. Multiple sealing design for excellent waterproof performance: The sealing components adopt an integrated structure of bottom sealing gasket, top sealing gasket and connecting section. The bottom sealing gasket fits against the panel and the outer ring limit edge, and the top sealing gasket covers the top of the limit edge and fits against the outer wall of the inner ring. After the knob cover is installed, it squeezes the top sealing gasket, which further promotes the bottom sealing gasket to fit tightly against the panel housing. At the same time, the sealing bearing and damping collar between the inner and outer rings also form an auxiliary seal. The multiple sealing structure forms a three-dimensional waterproof barrier, which can effectively prevent rainwater, mud and other substances in the mixer truck working environment from seeping in and protect the encoder from damage.

[0015] 3. Stable structure ensures reliable operation: The outer and inner rings of the rotating connecting component are connected by a sealed bearing and a damping collar. The inner ring can rotate stably and avoids axial misalignment, ensuring accurate response of the encoder input shaft when adjusting the knob. The limiting slide of the connecting shaft slides and engages with the limiting groove of the inner ring to prevent relative rotational wear. The positioning protrusion of the outer ring cooperates with the positioning groove of the panel to prevent the sealed connecting component from rotating with the knob. In addition, the locking protrusion and the limiting protrusion engage and fix the knob to prevent it from falling off during use. The overall structure ensures long-term stable operation of the knob and improves the reliability of the mixer truck's control operation. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the overall structure of a waterproof knob for an encoder on a mixer truck control panel according to this utility model. Figure 2 This is an exploded cross-sectional view of the overall structure of this utility model; Figure 3 This is a schematic diagram of the overall structure of the knob body in this utility model; Figure 4 This is a cross-sectional view of the overall structure of the sealing connector in this utility model; Figure 5 This is a cross-sectional view of the overall structure of the rotating connecting component in this utility model; Figure 6 This is a cross-sectional view of the overall structure of the sealing component in this utility model.

[0017] The components represented by each number in the attached diagram are listed below: 1. Knob body; 2. Sealing connector; 3. Panel housing; 4. Rotating connector; 5. Sealing component; 6. Outer ring; 7. Inner ring; 8. Damping collar; 9. Sealed bearing; 10. Mounting groove; 11. Knob cover; 12. Connecting shaft; 13. Limiting edge; 14. Limiting retaining ring; 15. Fixing section; 16. Bottom sealing gasket; 17. Top sealing gasket; 18. Connecting section; 19. Pressing edge; 20. Locking groove; 21. Locking protrusion; 22. Limiting protrusion; 23. Connecting groove; 24. Limiting groove; 25. Limiting slide; 26. Positioning protrusion; 27. Positioning groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This utility model provides a technical solution: Please refer to Figures 1-6A waterproof knob for an encoder on a mixer truck control panel includes a knob body 1, a sealing connector 2, and a panel housing 3. The knob body 1 is mounted on the panel housing 3 via the sealing connector 2. The sealing connector 2 includes a rotating connecting component 4 and a sealing component 5. The rotating connecting component 4 includes an outer ring 6 and an inner ring 7. A damping collar 8 and a sealing bearing 9 are arranged vertically between the outer ring 6 and the inner ring 7. The panel housing 3 has an installation groove 10. The outer ring 6 drives the inner ring 7 to engage and be fixed in the installation groove 10. The sealing component 5 is located at the upper end of the outer ring 6 and the inner ring 7. The knob body 1 includes a knob cover 11. A connecting shaft 12 is provided at the bottom of the inner end of the knob cover 11. The connecting shaft 12 passes through the top of the inner ring 7 and its bottom end engages with the input shaft of the encoder on the mixer truck control panel. The damping collar 8 is used to adjust the rotational damping of the inner ring 7 relative to the outer ring 6, and the sealing bearing 9 is used to achieve coaxial rotation and radial sealing between the inner ring 7 and the outer ring 6.

[0020] Please see Figures 1-6 As one implementation method for the outer ring 6: the top of the outer ring 6 is provided with a limiting edge 13 and the bottom is provided with a limiting ring 14. A fixing section 15 is provided at the mounting groove 10. The outer ring 6 drives the inner ring 7 to be installed into the mounting groove 10 and is fixed on the fixing section 15 by the limiting edge 13 and the limiting ring 14. The limiting edge 13 is used to limit the top of the outer ring 6 when it is installed, and the limiting ring 14 is used to limit the bottom of the outer ring 6 when it is installed. The outer ring 6 can be stably installed in the fixing section 15 by the cooperation of the limiting edge 13 and the limiting ring 14. One end of the outer ring 6 connected to the limiting ring 14 can be elastically designed, such as an elastic claw.

[0021] Please see Figures 1-6 As one embodiment of the sealing component 5: the sealing component 5 includes a bottom sealing gasket 16, a top sealing gasket 17, and a connecting section 18. The bottom sealing gasket 16 is located at the bottom end of the limiting edge 13, and the top sealing gasket 17 is located at the top end of the limiting edge 13, with its inner end fitting against the outer wall of the inner ring 7. The connecting section 18 is used to integrally connect the outer ends of the top sealing gasket 17 and the bottom sealing gasket 16. Through the cooperation of the bottom sealing gasket 16, the top sealing gasket 17, and the connecting section 18, a full sealing connection can be achieved between the sealing connector 2 and the panel housing 3, as well as between the sealing connector 2 and the knob body 1. The sealing component 5 is easy to disassemble and replace. The inner end of the top sealing gasket 17 is made of fluororubber with a low coefficient of friction, or a wear-resistant coating is provided at the corresponding position on the outer wall of the inner ring 7 to reduce friction.

[0022] Please see Figures 1-6As one embodiment of the knob cover 11: The knob cover 11 is provided with a pressing edge 19 inside. After the knob body 1 is installed, the pressing edge 19 presses and fixes itself on the top sealing gasket 17. The knob cover 11 will press down on the top sealing gasket 17 and press the limiting edge 13 through the top sealing gasket 17. Then, the limiting edge 13 will press down on the bottom sealing gasket 16. This can achieve a full seal between the panel housing 3 and the knob cover 11, and at the same time, it can enhance the sealing effect between the limiting edge 13 and the panel housing 3 and between the knob cover 11 and the limiting edge 13, thereby improving the overall waterproof performance of the knob body 1.

[0023] Please see Figures 1-6 As one embodiment of the pressing edge 19: a locking groove 20 is provided between the pressing edge 19 and the connecting shaft 12. A locking protrusion 21 is provided at the bottom of the inner end of the locking groove 20. A limiting protrusion 22 is provided on the outer side of the top of the inner ring 7. The locking protrusion 21 and the limiting protrusion 22 are engaged with each other. After the connecting shaft 12 is inserted into the inner ring 7, the knob cover 11 is pressed against the top of the inner ring 7, so that the locking protrusion 21 at the bottom of the locking groove 20 and the limiting protrusion 22 on the outer side of the top of the inner ring 7 are engaged with each other, thereby realizing the locking connection between the knob cover 11 and the top of the inner ring 7.

[0024] Please see Figures 1-6 As one implementation of the connecting shaft 12: a connecting groove 23 is provided at the bottom end of the connecting shaft 12. The bottom end of the connecting shaft 12 is engaged with the input shaft of the encoder on the control panel of the mixer truck through the connecting groove 23. The connecting groove 23 enables the connecting shaft 12 to quickly engage with the input shaft of the encoder.

[0025] Please see Figures 1-6 As one implementation of the inner ring 7: a limiting groove 24 is formed on the inner wall of the inner ring 7, and a limiting slide 25 is provided on the connecting shaft 12. The limiting slide 25 and the limiting groove 24 are slidably engaged. The connection stability between the connecting shaft 12 and the inner ring 7 can be improved by the cooperation of the limiting slide 25 and the limiting groove 24, and relative rotational wear between the connecting shaft 12 and the inner ring 7 can be avoided.

[0026] Please see Figures 1-6 As one implementation of the limiting edge 13: a positioning protrusion 26 is provided at the bottom end of the limiting edge 13, and a positioning groove 27 is provided on the panel housing 3. The positioning protrusion 26 and the positioning groove 27 are engaged and positioned. Through the cooperation of the positioning protrusion 26 and the positioning groove 27, the sealing connector 2 can be accurately positioned when installed on the panel housing 3, thereby improving the installation stability of the sealing connector 2. At least two positioning protrusions 26 are provided circumferentially along the bottom end of the limiting edge 13, corresponding to the positioning groove 27 on the panel housing 3, to ensure that the outer ring 6 is coaxial with the encoder input shaft after installation, thus enhancing the technical support for structural stability.

[0027] In summary, the working principle and specific workflow of this utility model are as follows: This utility model achieves the connection between the knob body 1 and the panel housing 3 through the sealing connector 2, which can avoid the knob body 1 directly contacting the panel housing 3, thereby reducing the damage to the panel housing 3 during disassembly and maintenance. Furthermore, the sealing connector 2 in this utility model includes an inner ring 7 and an outer ring 6, which are connected and fixed by a sealing bearing 9. In this way, the inner ring 7 can rotate relative to the outer ring 6. At the same time, by setting a damping collar 8, the rotational stability of the inner ring 7 relative to the outer ring 6 can be improved. Thus, when the knob body 1 is installed later through the inner ring 7, the rotational adjustment of the knob body 1 can be achieved. In this way, through the cooperation of the inner ring 7 and the outer ring 6, the knob body 1 can be stably installed on the panel housing 3, thereby avoiding the situation where the axis of the knob body 1 tilts when it is turned, which affects the rotation effect of the encoder. During installation, the bottom sealing gasket 16 of the sealing component 5 is first engaged at the bottom end of the limiting edge 13, and the top sealing gasket 17 is engaged at the top end of the limiting edge 13, so that the top sealing gasket 17 covers the top of the limiting edge 13 and the top of the damping collar 8, and the inner end of the top sealing gasket 17 slides against the outer wall of the inner ring 7, thereby achieving stable installation of the sealing component 5 on the outer ring 6. Then, the outer ring 6 drives the inner ring 7 to be inserted into the mounting groove 10, and the top of the outer ring 6 is limited by the limiting edge 13, and the bottom of the outer ring 6 is limited by the limiting retaining ring 14. In this way, the sealing connector 2 is stably installed on the panel housing 3. At this time, the positioning protrusion 26 is located in the positioning groove 27, which can enhance the installation stability of the sealing connector 2 on the panel housing 3 and prevent the outer ring 6 in the sealing connector 2 from rotating when the knob body 1 rotates later. Then, the connecting shaft 12 at the bottom of the knob body 1 is inserted from the top of the inner ring 7 into the interior of the panel housing 3, so that the connecting groove 23 at the bottom of the connecting shaft 12 is engaged with the input shaft limit on the encoder of the mixer truck control operation panel. During this process, the limiting slide bar 25 on the connecting shaft 12 will slide and engage in the limiting groove 24 on the inner wall of the inner ring 7. Through the cooperation between the limiting slide bar 25 and the limiting groove 24, the connection stability between the connecting shaft 12 and the inner ring 7 is enhanced. After the knob body 1 is installed, the locking protrusion 21 at the bottom of the locking groove 20 will engage with the bottom of the limiting protrusion 22 on the outer side of the top of the inner ring 7. By limiting the locking protrusion 21 through the limiting protrusion 22, the inner ring 7 limits the knob body 1, thereby preventing the knob body 1 from falling off during use and improving the stability of the knob body 1. After installation, the knob cover 11 in the knob body 1 will press down on the top sealing gasket 17 and the limiting edge 13 through the top sealing gasket 17, and then press down on the bottom sealing gasket 16 through the limiting edge 13. This can achieve a full seal between the panel housing 3 and the knob cover 11, and at the same time enhance the sealing effect between the limiting edge 13 and the panel housing 3 and between the knob cover 11 and the limiting edge 13, thereby improving the overall waterproof performance of the knob body 1. When disassembling, gently pull the knob cover 11 upwards. After the locking protrusion 21 is elastically deformed, it will disengage from the limiting protrusion 22, and the knob body 1 can be pulled out from the inner ring 7. When disassembling the sealing connector 2, press the elastic end of the limiting ring 14 to remove the outer ring 6 from the mounting groove 10. Alternatively, it can be quickly pried out with the help of tools such as a flathead screwdriver, making disassembly convenient.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waterproof knob for an encoder on a mixer truck control panel, comprising a knob body (1), a sealing connector (2), and a panel housing (3), characterized in that: The knob body (1) is mounted on the panel housing (3) via a sealing connector (2). The sealing connector (2) includes a rotating connecting component (4) and a sealing component (5). The rotating connecting component (4) includes an outer ring (6) and an inner ring (7). A damping collar (8) and a sealing bearing (9) are provided between the outer ring (6) and the inner ring (7). An installation groove (10) is provided on the panel housing (3). The outer ring (6) drives the inner ring (7) to engage and fix in the installation groove (10). The sealing component (5) is located at the upper end of the outer ring (6) and the inner ring (7). The knob body (1) includes a knob cover (11). A connecting shaft (12) is provided at the bottom of the inner end of the knob cover (11). The connecting shaft (12) passes through the top of the inner ring (7) and its bottom end engages with the input shaft of the encoder on the mixer truck control panel.

2. The waterproof knob for the encoder of the control panel of a mixer truck according to claim 1, characterized in that: The outer ring (6) has a limiting edge (13) at the top and a limiting ring (14) at the bottom. A fixing section (15) is provided at the mounting groove (10). The outer ring (6) drives the inner ring (7) to be installed in the mounting groove (10) and is fixed on the fixing section (15) by the limiting edge (13) and the limiting ring (14).

3. A waterproof knob for an encoder on a mixer truck control panel according to claim 2, characterized in that: The sealing component (5) includes a bottom sealing gasket (16), a top sealing gasket (17), and a connecting section (18). The bottom sealing gasket (16) is located at the bottom end of the limiting edge (13), the top sealing gasket (17) is located at the top end of the limiting edge (13), and its inner end is in contact with the outer wall of the inner ring (7). The connecting section (18) is used to integrally connect the outer ends of the top sealing gasket (17) and the bottom sealing gasket (16).

4. A waterproof knob for an encoder on a mixer truck control panel according to claim 3, characterized in that: The knob cover (11) has a pressing edge (19) inside. After the knob body (1) is installed, the pressing edge (19) is pressed and fixed on the top sealing gasket (17).

5. A waterproof knob for an encoder on a mixer truck control panel according to claim 4, characterized in that: A locking groove (20) is provided between the pressing edge (19) and the connecting shaft (12). A locking protrusion (21) is provided at the bottom of the inner side of the locking groove (20). A limiting protrusion (22) is provided on the outer side of the top of the inner ring (7). The locking protrusion (21) and the limiting protrusion (22) engage with each other.

6. A waterproof knob for an encoder on a mixer truck control panel according to claim 1, characterized in that: The bottom end of the connecting shaft (12) is provided with a connecting groove (23), and the bottom end of the connecting shaft (12) is engaged with the input shaft limit of the encoder on the control panel of the mixer truck through the connecting groove (23).

7. A waterproof knob for an encoder on a mixer truck control panel according to claim 5, characterized in that: A limiting groove (24) is provided on the inner wall of the inner ring (7), and a limiting slide (25) is provided on the connecting shaft (12). The limiting slide (25) and the limiting groove (24) are slidably engaged.

8. A waterproof knob for an encoder on a mixer truck control panel according to claim 2, characterized in that: A positioning protrusion (26) is provided at the bottom end of the limiting edge (13), and a positioning groove (27) is provided on the panel housing (3) to fit together. The positioning protrusion (26) and the positioning groove (27) are engaged in a limiting fit.

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