Pitch adjustment mechanism and fan

Abstract

The utility model relates to the technical field of home appliances, disclose pitch adjusting mechanism and fan, pitch adjusting mechanism is integrated in the support column at least partly, the support column includes support column main part and the installation portion at support column main part upper end, and pitch adjusting mechanism includes: shaft sleeve subassembly, including first shaft sleeve and second shaft sleeve, first shaft sleeve and second shaft sleeve all include shaft body part and limiting portion, the shaft body part of first shaft sleeve and the shaft body part of second shaft sleeve rotatablely are arranged in the installation portion and are connected with each other, and the limiting portion of first shaft sleeve and the limiting portion of second shaft sleeve are limited in the both outer sides of installation portion and are fixedly connected with the head respectively. By embedding first shaft sleeve and second shaft sleeve in the inside of support column, realize the integration of pitch adjusting mechanism in the support column, improve the overall space utilization, the appearance adjustment of convenience, improve the possibility of the whole machine appearance modeling innovation.

Description

Technical Field

[0001] This utility model relates to the field of home appliance technology, specifically to a pitch adjustment mechanism and a fan. Background Technology

[0002] In order to achieve the tilting and oscillating motion of the fan head, most existing fans have a tilt adjustment mechanism between the fan head and the support frame. The support frame of existing fan products is usually divided into a single support column structure and a single support column double ear structure. Desktop fans mostly use a double ear support structure. The tilt adjustment mechanism is mostly installed on a single support column or set in a separate adjustment box. The overall structure is redundant and affects the aesthetics. Moreover, the single-sided arrangement will also affect the balance and stability of the whole machine.

[0003] Because the stability of a single-axis support is not as good as that of a double-ear support structure, and the overall design space is insufficient, the original structure cannot meet the requirements when designing the appearance. In order to ensure the overall stability, the existing single-axis support table fan's tilt adjustment mechanism mostly adopts an outward expansion shape to expand the space. The overall structure is redundant and affects the aesthetics. Furthermore, as the demand for table fan styling increases, the above structure cannot be realized in the limited space, which limits the diversity of the overall design. Utility Model Content

[0004] In view of this, the present invention provides a possible pitch adjustment mechanism and fan that is compact in structure, stable in operation, and improves the innovative appearance of the whole machine, so as to solve the problems of insufficient installation space, redundant overall structure and unsightly appearance of existing pitch adjustment mechanisms, which limit the diversity of the overall machine design.

[0005] In a first aspect, this utility model provides a pitch adjustment mechanism for pivotally connecting the head and the support column, wherein the pitch adjustment mechanism is at least partially integrated within the support column;

[0006] The support column includes a support column body and a mounting part located at the upper end of the support column body. The pitch adjustment mechanism includes:

[0007] A bushing assembly includes a first bushing and a second bushing, both of which include a shaft body and a limiting part.

[0008] The shaft body portion of the first bushing and the shaft body portion of the second bushing are rotatably inserted into the mounting portion and connected to each other. The limiting portion of the first bushing and the limiting portion of the second bushing are limited on both sides of the mounting portion and fixedly connected to the machine head respectively.

[0009] Beneficial Effects: The pitch adjustment mechanism, by employing a first and second bushing design and embedding them within the support column through slots, integrates the pitch adjustment mechanism into the support column, improving overall space utilization, facilitating appearance adjustments, and enhancing the possibility of innovative overall design. Furthermore, integrating the first and second bushings onto the support column results in a more compact structure, eliminating the need for additional mounting boxes or other structures for the pitch adjustment mechanism. This simplifies the overall structure, resulting in a smaller, more aesthetically pleasing unit. Simultaneously, the first and second bushings, distributed on both sides of the support column, ensure balanced and stable force distribution, enhancing stability and enabling stable operation of the single-axis supported fan pitch adjustment mechanism. This effectively solves the problems of insufficient installation space, redundant structure, and aesthetic limitations in existing pitch adjustment mechanisms, which restrict the diversity of overall design.

[0010] In one optional embodiment, a positioning rib is provided on one of the shaft body portion of the first bushing and the shaft body portion of the second bushing, and a positioning groove is provided on the other.

[0011] The first and second bushings achieve positioning and circumferential limitation through the interlocking of positioning ribs and positioning grooves.

[0012] Beneficial effects: The first and second bushings, through the interlocking of the positioning ribs and the positioning grooves, not only achieve positioning and facilitate the alignment and connection of the two bushings, thus improving assembly efficiency, but also provide dual protection, ensuring that the two bushings can rotate synchronously and share the force, preventing deformation and damage to the connection part of the two bushings due to excessive force. Moreover, the interlocking structure is relatively simple and easy to disassemble and assemble.

[0013] In one optional embodiment, both the shaft body portion of the first bushing and the shaft body portion of the second bushing are provided with connecting holes.

[0014] The bushing assembly also includes a fastener that passes through and connects between the connecting holes of the first bushing and the second bushing.

[0015] Beneficial effects: The first and second bushings are reasonably arranged on the left and right sides of the support column, which realizes the integration of the pitch adjustment mechanism inside the support column, reduces the space occupied by the mechanism, further improves the possibility of appearance innovation, and the first and second bushings are locked together by fasteners, which can achieve effective overall limiting, ensure support strength, and ensure the stability and reliability of the pitch adjustment mechanism.

[0016] In one alternative embodiment, a limiting groove is provided on one of the outer periphery of the shaft body portion and the inner periphery of the mounting portion of the first bushing, and a limiting boss is provided on the other.

[0017] During the pitching process of the nose, the limiting boss slides relative to the limiting groove and can limit the pitching angle of the nose.

[0018] Beneficial effects: The outer circumference of the shaft body and the inner circumference of the mounting part of the first bushing adopt a clearance fit. The guide limit structure can be formed by the cooperation of the limit slide groove and the limit boss. On the one hand, it ensures the smooth movement of the mechanism, and on the other hand, it can limit the pitch angle of the machine head within the set range to avoid structural damage caused by excessive pitch angle.

[0019] In one optional embodiment, the limiting groove is a groove structure formed on the outer peripheral wall of the shaft body portion of the first bushing, and the limiting boss is fixedly disposed on the inner peripheral wall of the mounting portion.

[0020] The limiting slide includes a slide body and a groove opening. The groove opening connects the end face of the shaft body of the first bushing and the slide body. The limiting boss enters the slide body from the groove opening and is limited within the slide body.

[0021] Beneficial effects: The groove opening is a narrowed opening smaller than the main body of the slide. The limiting slide forms a stepped structure through the design of the slide body and the groove opening. The limiting boss can form pre-positioning for assembly and rotation limiting with the groove opening and the slide body, respectively. When the first bushing is installed and inserted into the inner hole of the support column, it is limited by the groove opening and the limiting boss. At this time, the limiting boss can only pass through the groove opening of the first bushing, thus determining a unique assembly position and forming a pre-positioning, improving assembly efficiency. After the first bushing is assembled, the limiting boss has completely passed through the groove opening. At this time, the limiting boss can and can only rotate within the slide body, forming a rotation limiting on the first bushing and restricting the overall pitch angle.

[0022] In one alternative implementation, the pitch adjustment mechanism includes:

[0023] The adjustment component has a mounting slot on the mounting part for accommodating the adjustment component. The adjustment component is set in the mounting slot and abuts against the bushing assembly to stabilize the machine head at the set pitch angle.

[0024] Beneficial effects: By creating a mounting slot on the mounting section to accommodate the adjustment components, the adjustment components can be integrated onto the support column, further simplifying the structure and improving space utilization.

[0025] In one alternative implementation, the regulating component includes:

[0026] The first adjusting member has a mounting groove, which is provided on one end face of the mounting part near the first bushing, and the first adjusting member is provided in the first mounting groove.

[0027] One end of the first adjusting member abuts against the mounting part, and the other end can extend and abut against the first bushing. During the pitching process of the machine head, it can extend into the positioning hole directly or indirectly provided on the first bushing to position the machine head at the set pitch angle.

[0028] Beneficial effects: During the pitching process of the machine head, the first adjusting component continuously provides elastic force to the first bushing, causing the first bushing to move away from the mounting part. At this time, the inner end face of the retaining rib at the groove will tightly abut against the end face of the limiting boss, providing support and reaction force to ensure stable operation of the mechanism. Furthermore, when the machine head pitches and rotates, the first adjusting component is repeatedly compressed and ejected, using friction and clamping force to lock into the positioning hole directly or indirectly set on the first bushing, thereby realizing the adjustment and fixation of the pitch angle of the machine head. In this embodiment, the first mounting groove set on the end face of the mounting part near the first bushing can integrate the first adjusting component into the support column, further simplifying the overall structure, improving space utilization, making the whole machine more compact, and more conducive to the innovation of the overall appearance of the machine.

[0029] In one alternative implementation, the adjustment component further includes:

[0030] The second adjusting component has a mounting groove, which is provided on the end face of the mounting part near the second bushing.

[0031] The second adjusting member is embedded in the second mounting groove, and its two ends abut against the mounting part and the second bushing respectively. The second adjusting member is used to apply an upward rotational elastic support force to the second bushing during the pitching process of the machine head.

[0032] Beneficial effects: The second adjusting component is installed in the second mounting slot of the support column, integrating it onto the support column, simplifying the overall structure and improving space utilization. Both ends of the second adjusting component abut against the second bushing and the support column, respectively. During the pitching motion of the machine head, the rotation of the second bushing compresses one end of the second adjusting component, which provides a spring reaction force to prevent excessive weight of the machine head from causing the ball-bearing spring adjustment mechanism to fail, thus improving the overall structural stability. In this embodiment, the first and second mounting slots are located on the left and right sides of the mounting section, and the first and second adjusting components are evenly distributed on both sides of the support column, resulting in a more balanced and stable force distribution and further improving overall stability.

[0033] In one alternative embodiment, the first bushing and the second bushing are fixedly connected to the machine head by means of plugging and / or snapping.

[0034] Beneficial effects: The first and second bushings are connected to the machine head by plugging and / or snapping, which makes the connection firm and reliable and easy to disassemble and assemble.

[0035] Secondly, this utility model also provides a fan, including a fan head, a support column, and a pitch adjustment mechanism according to any of the above embodiments, wherein the pitch adjustment mechanism pivotally connects the fan head to the support column. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the assembly of the pitch adjustment mechanism and the support column in an embodiment of this utility model;

[0038] Figure 2 for Figure 1 The front view;

[0039] Figure 3 for Figure 1 First-person exploded view;

[0040] Figure 4 for Figure 1 Exploded view from a second-person perspective;

[0041] Figure 5 for Figure 1 A third-person perspective exploded view;

[0042] Figure 6 This is a structural schematic diagram of the inner side of the first bushing in an embodiment of the present invention;

[0043] Figure 7 This is a structural schematic diagram of the first bushing from the outer side in an embodiment of the present invention;

[0044] Figure 8 This is a structural schematic diagram of the second bushing from the inner side view in an embodiment of this utility model;

[0045] Figure 9 This is a structural schematic diagram from the outer side of the second bushing in an embodiment of the present invention;

[0046] Figure 10 This is a schematic diagram of the structure of the limiting piece in an embodiment of the present invention;

[0047] Figure 11 This is an assembly cross-sectional view of the first bushing and the mounting part when the limiting boss is in the slot position in this embodiment of the utility model;

[0048] Figure 12This is an assembly cross-sectional view of the first bushing and the mounting part when the limiting boss is inside the slide body in this embodiment of the utility model;

[0049] Figure 13 This is a cross-sectional view of one position of the mating part between the second bushing and the mounting part in an embodiment of this utility model;

[0050] Figure 14 This is a cross-sectional view of another location where the second bushing and the mounting part mate in an embodiment of this utility model.

[0051] Explanation of reference numerals in the attached figures:

[0052] 10. Support column; 101. Support column body; 102. Mounting part; 1021. Limiting boss; 1022. First mounting groove; 1023. Second mounting groove;

[0053] 40. Pitch adjustment mechanism; 400. Connecting hole; 401. Shaft body; 4011. Positioning rib; 4012. Positioning groove; 402. Limiting part;

[0054] 41. First bushing; 411. Limiting groove; 4111. Groove body; 4112. Groove opening; 4113. Retaining rib; 412. First insertion protrusion rib; 413. First snap-fit ​​position;

[0055] 42. Second bushing; 421. Second insertion rib; 422. Second snap-fit ​​position; 423. Abutment groove;

[0056] 43. Limiting piece; 431. Positioning hole; 432. Connecting protrusion;

[0057] 44. First adjusting component; 441. Column spring; 442. Ball bearing;

[0058] 45. Second adjusting component. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0060] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0062] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0063] Existing fan products typically use either a single-support-column structure or a single-support-column double-ear structure for the support column. In the single-support-column double-ear structure, the support column is Y-shaped. Currently, most small desktop fans use a double-ear support structure, with the tilt adjustment mechanism usually installed on one side of the support column or housed in a separate adjustment box. This results in a redundant structure that negatively impacts aesthetics. Because single-axis support is less stable than double-ear support and the overall design space is insufficient, existing structures cannot accommodate aesthetic design. Therefore, single-axis support desktop fans are rare on the market, limiting the diversity of overall designs. To ensure overall stability, some fans use a combination of ball bearings and torsion springs for tilt adjustment, often employing an outward-expanding shape to extend the space and ensure proper mechanism execution. However, with increasing demands for diverse fan designs, these structures cannot be implemented within limited space.

[0064] In view of this, this embodiment is proposed.

[0065] The following is combined Figures 1 to 14 The following describes embodiments of the present invention.

[0066] According to an embodiment of the present invention, in one aspect, the present invention provides a pitch adjustment mechanism 40 for pivotally connecting the machine head and the support column 10. The pitch adjustment mechanism 40 is at least partially integrated within the support column 10. The support column 10 includes a support column body 101 and a mounting portion 102 located at the upper end of the support column body 101. The pitch adjustment mechanism 40 includes: a bushing assembly including a first bushing 41 and a second bushing 42. Both the first bushing 41 and the second bushing 42 include a shaft body portion 401 and a limiting portion 402. The shaft body portion 401 of the first bushing 41 and the shaft body portion 401 of the second bushing 42 are rotatably inserted into the mounting portion 102 and connected to each other. The limiting portion 402 of the first bushing 41 and the limiting portion 402 of the second bushing 42 are limited on both outer sides of the mounting portion 102 and are respectively fixedly connected to the machine head.

[0067] In the above embodiments, the pitch adjustment mechanism 40 adopts a design with a first bushing 41 and a second bushing 42. By slotting the support column 10, the first bushing 41 and the second bushing 42 are embedded inside the support column 10, thus integrating the pitch adjustment mechanism 40 into the support column 10. This improves the overall space utilization, facilitates appearance adjustments, and enhances the possibility of innovative overall appearance design. Furthermore, by integrating the first bushing 41 and the second bushing 42 onto the support column 10, the overall structure becomes more compact, eliminating the need for additional mounting boxes or other structures to install the pitch adjustment mechanism 40. This simplifies the overall structure, resulting in a smaller and more aesthetically pleasing machine. Simultaneously, the first bushing 41 and the second bushing 42 are distributed on both sides of the support column 10, ensuring balanced and stable force distribution and higher stability. This enables stable operation of the single-axis supported fan pitch adjustment mechanism 40, effectively solving the problems of insufficient installation space, redundant overall structure, and aesthetic impact in existing technologies, which limit the diversity of overall machine design.

[0068] Specifically, in this embodiment, the support column body 101 and the mounting part 102 are integrally injection molded. The mounting part 102 has a hollow cylindrical structure and a through hole. The shaft body 401 of the first bushing 41 and the shaft body 401 of the second bushing 42 are both disposed in the through hole of the mounting part 102. The first bushing 41 and the second bushing 42 pass through the mounting part 102 from both sides. The shaft body 401 of the first bushing 41 and the shaft body 401 of the second bushing 42 are clearance-fitted with the inner hole of the mounting part 102 to ensure that the shaft body 401 of the first bushing 41 and the second bushing 42 can rotate freely within the mounting part 102. The interconnection of the two shaft body 401 effectively ensures that the two bushings can rotate synchronously with the machine head and also prevents the bushing assembly from detaching from the support column 10. Preferably, the first bushing 41 and the second bushing 42 are detachably connected and fixed. Optionally, the first bushing 41 and the second bushing 42 are snap-fitted and / or screwed and / or riveted.

[0069] Furthermore, the outer diameter of the limiting part 402 is larger than the inner diameter of the mounting part 102. Preferably, the outer diameter of the limiting part 402 is larger than the outer diameter of the mounting part 102. When the shaft body part 401 of the first bushing 41 and the second bushing 42 extends into the mounting part 102, the limiting part 402 is limited to the outside of the mounting part 102. On the one hand, it can realize the limiting of the pitch adjustment mechanism 40 and the mounting part 102 to realize the connection between the bushing assembly and the support column 10. On the other hand, the limiting part 402 located on the outside of the mounting part 102 can also facilitate the connection with the machine head.

[0070] In some embodiments, one of the shaft body portion 401 of the first bushing 41 and the shaft body portion 401 of the second bushing 42 is provided with a positioning rib 4011 and the other is provided with a positioning groove 4012; the first bushing 41 and the second bushing 42 achieve positioning and circumferential limitation through the convex-concave engagement of the positioning rib 4011 and the positioning groove 4012.

[0071] In the above embodiments, the first bushing 41 and the second bushing 42, through the convex-concave fit of the positioning rib 4011 and the positioning groove 4012, can not only achieve positioning and facilitate the alignment and connection of the two bushings, thus improving assembly efficiency, but also play a dual role in ensuring that the two bushings can rotate synchronously and share the force, thus preventing the connection part of the two bushings from deforming and being damaged due to excessive force. Moreover, the convex-concave fit structure is relatively simple and convenient for disassembly and assembly.

[0072] Specifically, in combination Figures 3 to 6 , Figure 8 As shown, a positioning rib 4011 is provided on the shaft body portion 401 of the first bushing 41, and a positioning groove 4012 is provided on the shaft body portion 401 of the second bushing 42. The positioning rib 4011 is fixedly provided on the end face of the shaft body portion 401 of the first bushing 41, and the positioning groove 4012 is formed on the side of the shaft body portion 401 of the second bushing 42 and extends through the end face.

[0073] Furthermore, the positioning rib 4011 is a U-shaped rib or a chamfered rib, and the positioning groove 4012 is a U-shaped rib or a chamfered groove provided on one side of the shaft body portion 401 of the second bushing 42. Preferably, both the shaft body portion 401 of the first bushing 41 and the second bushing 42 are hollow cylindrical structures. One side of the shaft body portion 401 of the second bushing 42 is chamfered to form a notch, and the middle part of the second bushing 42 is provided with a strip-shaped rib extending axially. There is a gap between the strip-shaped rib and the inner walls on both sides of the shaft body portion 401. This gap and the notch of the shaft body portion 401 of the second bushing 42 form a U-shaped positioning groove 4012. During assembly, the shaft body portion 401 of the first bushing 41 is fastened to the shaft body portion 401 of the second bushing 42, and the positioning ribs 4011 and positioning grooves 4012 on the two shaft body portions 401 interlock with each other to form a stable and reliable limiting fit. The design of the above-mentioned notch facilitates the interlocking of the shaft parts 401 of the two bushings, so that the positioning rib 4011 is engaged in the positioning groove 4012.

[0074] In some embodiments, the shaft body portion 401 of the first bushing 41 and the shaft body portion 401 of the second bushing 42 are both provided with connecting holes 400; the bushing assembly also includes a fastener, which is inserted and connected between the connecting holes 400 of the first bushing 41 and the second bushing 42.

[0075] In the above embodiments, the first bushing 41 and the second bushing 42 are reasonably arranged on the left and right sides of the support column 10, which realizes the integration of the pitch adjustment mechanism 40 inside the support column 10, reduces the space occupied by the mechanism, further improves the possibility of appearance innovation, and the first bushing 41 and the second bushing 42 are locked together by fasteners, which can achieve effective overall positioning, ensure support strength, and ensure the stability and reliability of the pitch adjustment mechanism 40 operation.

[0076] Specifically, the fasteners include bolts and rivets. Preferably, the fasteners are bolts, and the first bushing 41 and the second bushing 42 are locked together by bolts. Figure 6 and Figure 7 As shown, the shaft body 401 of the first bushing 41 is a cylindrical structure with one end closed and the other end open. The closed end is close to the second bushing 42, and a connecting hole 400 is provided on the end wall of the closed end. The circumferential edge of the open end is connected to the limiting part 402 of the first bushing 41. Figure 8 and Figure 9 As shown, the connecting hole 400 of the second bushing 42 is a bolt hole post opened on the strip-shaped protrusion inside the shaft body 401, which facilitates connection by self-tapping bolts without the need for nut fixing, thus simplifying the parts.

[0077] In some embodiments, combined with Figure 3 , Figure 4 , Figure 6 , Figure 11, Figure 12 , Figure 14 As shown, the mounting part 102 has a cylindrical structure; one of the outer periphery of the shaft body 401 of the first bushing 41 and the inner periphery of the mounting part 102 is provided with a limiting groove 411, and the other is provided with a limiting boss 1021; during the pitching process of the machine head, the limiting boss 1021 slides relative to the limiting groove 411 and can limit the pitching angle of the machine head.

[0078] In the above embodiments, the outer periphery of the shaft body 401 of the first bushing 41 and the inner periphery of the mounting part 102 are fitted with clearance. The cooperation of the limiting slide groove 411 and the limiting boss 1021 can form a guide limiting structure, which on the one hand ensures smooth movement of the mechanism, and on the other hand can limit the pitch angle of the machine head within a set range to avoid structural damage caused by excessive pitch angle.

[0079] Specifically, the outer peripheral wall of the shaft part 401 is in contact with the inner surface of the support column 10, and the groove wall of the limiting slide groove 411 and the limiting boss 1021 in the support column 10 form a guide limiting structure to ensure smooth assembly and mechanism movement. The central angle corresponding to the limiting slide groove 411 is the pitch angle range of the machine head.

[0080] In some embodiments, such as Figure 3 , Figure 6 , Figure 11 and Figure 12 As shown, the limiting groove 411 is a groove structure formed on the outer peripheral wall of the shaft body portion 401 of the first bushing 41, and the limiting boss 1021 is fixedly disposed on the inner peripheral wall of the mounting portion 102. The limiting groove 411 includes a groove body 4111 and a groove opening portion 4112. The groove opening portion 4112 connects the end face of the shaft body portion 401 of the first bushing 41 and the groove body 4111. The limiting boss 1021 enters the groove body 4111 from the groove opening portion 4112 and is limited within the groove body 4111.

[0081] In the above embodiment, the slot opening 4112 is a narrowed opening with a size smaller than that of the slide body 4111. The limiting slide 411 forms a stepped structure through the design of the slide body 4111 and the slot opening 4112. The limiting boss 1021 can form an assembly pre-positioning and a rotation limiting with the slot opening 4112 and the slide body 4111, respectively. Figure 6 , Figure 11 and Figure 12As shown, when the first bushing 41 is installed and inserted into the inner hole of the support column 10, it is limited by the slot 4112 and the limiting boss 1021. At this time, the limiting boss 1021 can only pass through the slot 4112 of the first bushing 41, thus determining a unique assembly position and forming a pre-position, improving assembly efficiency. After the first bushing 41 is assembled, the limiting boss 1021 has completely passed through the slot 4112. At this time, the limiting boss 1021 can and can only rotate within the slide body 4111, forming a rotational limit on the first bushing 41 and restricting the overall pitch angle.

[0082] Specifically, in this embodiment, the width of the groove portion 4112 in the circumferential direction of the first bushing 41 is smaller than the width of the slide body 4111, the width of the groove portion 4112 is slightly larger than the width of the limiting boss 1021, and the length of the slide body 4111 in the axial direction of the first bushing 41 is greater than the length of the limiting boss 1021. This design ensures that when the first bushing 41 is installed in the inner hole of the support column 10, the limiting boss 1021 can smoothly pass through the groove portion 4112 and enter the slide body 4111 to determine the unique assembly position. After the groove portion 4112 passes through the limiting boss 1021, since the length of the limiting boss 1021 is smaller than the length of the slide body 4111, the limiting boss 1021 and the slide body 4111 can slide freely relative to each other. The slide body 4111 is used to limit the rotation of the first bushing 41, thereby determining the overall pitch angle.

[0083] Furthermore, combined Figure 6 As shown, the limiting slide 411 is an L-shaped open slot. The L-shaped limiting slide 411 includes a vertically arranged long slot and a short slot. The long slot forms the slide body 4111, and the short slot forms the slot opening 4112. A retaining rib 4113 is also formed between the slide body 4111 and the slot opening 4112. The retaining rib 4113 is positioned at the slot opening. When the limiting boss 1021 slides into the slide body 4111, the retaining rib 4113 can limit the limiting boss 1021 in the axial direction of the first bushing 41, preventing the limiting boss 1021 from detaching from the slide body 4111. The two opposite slot walls of the slide body 4111 in the circumferential direction of the first bushing 41 form a limiting stop wall. This limiting stop wall cooperates with the limiting boss 1021 to limit the pitch angle of the machine head.

[0084] In some embodiments, the pitch adjustment mechanism 40 includes an adjustment component. The mounting part 102 is provided with a mounting groove for accommodating the adjustment component. The adjustment component is disposed in the mounting groove and abuts against the bushing assembly to stabilize the head at a set pitch angle.

[0085] In the above embodiments, by providing a mounting slot on the mounting part 102 for accommodating the adjustment component, the adjustment component can be integrated onto the support column 10, further simplifying the structure and improving space utilization.

[0086] In some embodiments, the adjustment assembly includes a first adjustment member 44, and the mounting groove includes a first mounting groove 1022. The first mounting groove 1022 is disposed on the side end face of the mounting part 102 near the first bushing 41, and the first adjustment member 44 is disposed in the first mounting groove 1022. One end of the first adjustment member 44 abuts against the mounting part 102, and the other end is retractably abuts against the first bushing 41. During the pitching process of the machine head, it can extend into the positioning hole 431 directly or indirectly disposed on the first bushing 41 to position the machine head at a set pitch angle.

[0087] In the above embodiment, during the pitching process of the machine head, the first adjusting member 44 will always provide elastic force to the first bushing 41, causing the first bushing 41 to move away from the mounting part 102. At this time, the inner end face of the baffle 4113 at the slot 4112 will abut against the end face of the limiting boss 1021, providing a support reaction force to ensure the stable operation of the mechanism. When the machine head pitches and rotates, the first adjusting member 44 will be repeatedly compressed and ejected, using friction and clamping force to lock into the positioning hole 431 directly or indirectly provided on the first bushing 41, thereby realizing the adjustment and fixation of the pitch angle of the machine head. In this embodiment, the first mounting groove 1022 provided on the end face of the mounting part 102 near the first bushing 41 can integrate the first adjusting member 44 into the support column 10, further simplifying the overall structure, improving space utilization, making the whole machine more compact, and more conducive to the innovation of the overall appearance.

[0088] Specifically, the first adjusting member 44 is a telescopic or elastic member. The telescopic characteristic of the first adjusting member 44 facilitates the first adjusting member 44 to abut against different positioning holes 431 when the bushing assembly and the machine head rotate synchronously, thereby fixing the machine head at different angles. The first adjusting member 44 can be a spring, a backing member, a telescopic rod, etc., as long as it can achieve the abutting action with different positioning holes 431.

[0089] Preferably, the first adjusting member 44 is an elastic member. More preferably, the first adjusting member 44 includes a spring 441 and a ball bearing 442 disposed on the limiting plate 43. The spring 441 is adapted to abut against different positioning holes 431 using the elastic extension and contraction characteristics of the limiting plate 43 to achieve fixing of the machine head at different angles. The first mounting groove 1022 is a cylindrical groove formed on the mounting part 102. The inner circumferential shape and size of the cylindrical groove match the outer circumferential shape and size of the spring 441. One end of the spring 441 without the ball bearing 442 is limited in the first mounting groove 1022, and the other end extends out of the first mounting groove 1022 and abuts against the first bushing 41.

[0090] It should be noted that in this embodiment, the positioning hole 431 can also be directly opened on the limiting part 402 of the first bushing 41, which can further simplify the structure and reduce the number of parts.

[0091] In some alternative embodiments, such as 3 to Figure 6 as well as Figure 10 The bushing assembly also includes a limiting piece 43, which is detachably mounted and fixed on the first bushing 41. The limiting piece 43 has a plurality of positioning holes 431 spaced apart along the circumference of the first bushing 41; preferably, the plurality of positioning holes 431 are evenly spaced. One end of the first adjusting member 44 abuts against the mounting part 102, and the other end retractably abuts against the limiting piece 43. During the pitching process of the machine head, it can extend into the positioning hole 431 to position the machine head at a set pitch angle.

[0092] Furthermore, the limiting piece 43 is fixedly disposed on the side of the first bushing 41 near the mounting part 102. Specifically, the outer periphery of the limiting piece 43 is provided with multiple connecting protrusions 432 at intervals, and the limiting part 402 of the first bushing 41 is provided with multiple connecting slots at corresponding intervals. The multiple connecting protrusions 432 are engaged in the connecting slots one by one to fix the limiting piece 43 to the first bushing 41. When the machine head is stationary, the limiting piece 43 is pressed tightly against the left end face of the support column 10 by the first bushing 41. The limiting piece 43 can press the ball bearing 442 and the spring 441 into the first mounting groove 1022 in the support column 10. When the machine head is tilted and rotated, the ball bearing 442 is repeatedly compressed and ejected, and is locked in the positioning holes 431 evenly distributed on the limiting piece 43 by friction and clamping force, so as to realize the adjustment and positioning of the tilt angle of the machine head.

[0093] In some embodiments, the adjustment assembly further includes a second adjustment member 45, and the mounting groove includes a second mounting groove 1023, which is disposed on the end face of the mounting portion 102 near the second bushing 42; the second adjustment member 45 is embedded in the second mounting groove 1023, and its two ends abut against the mounting portion 102 and the second bushing 42 respectively, and the second adjustment member 45 is used to apply an upward rotational elastic support force to the second bushing 42 during the pitching process of the machine head.

[0094] In the above embodiments, combined with Figure 4 , Figure 8 , Figure 9 and Figure 13 and Figure 14As shown, the second adjusting member 45 is installed in the second mounting groove 1023 of the support column 10, integrating the second adjusting member 45 onto the support column 10, simplifying the overall structure and improving space utilization. The two ends of the second adjusting member 45 abut against the second bushing 42 and the support column 10, respectively. When the machine head pitches, the second bushing 42 rotates, causing one end of the second adjusting member 45 to compress. The second adjusting member 45 provides a spring reaction force, preventing the ball bearing spring adjustment mechanism from failing due to excessive machine head weight, thus improving the overall structural stability. In this embodiment, the first mounting groove 1022 and the second mounting groove 1023 are located on the left and right sides of the mounting part 102, and the first adjusting member 44 and the second adjusting member 45 are correspondingly and evenly distributed on both sides of the support column 10, resulting in a more balanced and stable force distribution and further improving overall stability.

[0095] Specifically, the second adjusting member 45 is a torsion spring, which provides anti-torsion force when the machine head pitches and rotates. The second mounting groove 1023 is an annular groove formed on the end face of the mounting part 102. The torsion spring is embedded in the annular second mounting groove 1023. The second mounting groove 1023 is provided with a groove for abutting and cooperating with one end of the torsion spring. The limiting part 402 of the second bushing 42 is correspondingly provided with an abutting groove 423 for abutting and cooperating with the other end of the torsion spring.

[0096] Preferably, the mounting part 102 adopts a design with thickened ends and a hollow center. The mounting part 102 includes thickened portions at both ends, and the first mounting groove 1022 and the second mounting groove 1023 are formed within the thickened portions at both ends. This design ensures the structural strength of the entire support column 10, thereby ensuring the stability of the pitch adjustment mechanism 40 during operation. The hollow center of the mounting part 102 facilitates the demolding of the mounting part 102, reducing the weight of the support column 10, and also facilitates the inspection of the mating fit of the first bushing 41 and the second bushing 42 within the mounting part 102, making adjustments easier.

[0097] In some embodiments, the first bushing 41 and the second bushing 42 are fixedly connected to the machine head by means of plugging and / or snapping.

[0098] In the above embodiments, the first bushing 41 and the second bushing 42 are connected to the machine head by plugging and / or snapping, which makes the connection firm and reliable and convenient for disassembly and assembly.

[0099] Specifically, a first insertion protrusion 412 is provided on the outer wall of the limiting part 402 of the first bushing 41, and a second insertion protrusion 421 is provided on the outer wall of the limiting part 402 of the second bushing 42. The first insertion protrusion 412 and the second insertion protrusion 421 are adapted to be inserted and limited in the connecting slot of the machine head. The first insertion protrusion 412 and the second insertion protrusion 421 and the connecting slot are clearance fit for easy disassembly and assembly.

[0100] Furthermore, the limiting part 402 is a limiting plate, and the first insertion protrusion 412 and the second insertion protrusion 421 are non-cylindrical protrusions, which can ensure that the bushing assembly can rotate synchronously with the head, realizing the limiting of the two in the circumferential direction. Optionally, the first insertion protrusion 412 and the second insertion protrusion 421 are U-shaped, C-shaped, O-shaped, or L-shaped, etc. In the accompanying drawings of this embodiment, the first insertion protrusion 412 is U-shaped and the second insertion protrusion 421 is O-shaped.

[0101] Furthermore, a first engaging position 413 is provided on the outer wall of the limiting portion 402 of the first bushing 41, and a second engaging position 422 is provided on the outer wall of the limiting portion 402 of the second bushing 42. The first engaging position 413 and the second engaging position 422 respectively engage with the buckles on the machine head. Preferably, a motor bracket is fixedly provided inside the machine head, and the motor bracket is provided with buckles for engaging with the first engaging position 413 and the second engaging position 422 respectively. Optionally, the first engaging position 413 and the second engaging position 422 are slots and / or platforms.

[0102] In this embodiment, the bushing assembly and the machine head are synchronized in rotation by using the insertion protrusions and snap-fit ​​positions on the back of the two bushings to cooperate during pitch and rotation. The two bushings are fixed in place by being inserted into the connecting slots inside the machine head via the first insertion protrusion 412 and the second insertion protrusion 421; further, they are secured by the snap-fit ​​between the first snap-fit ​​position 413, the second snap-fit ​​position 422, and the motor bracket, resulting in a more reliable and stable connection.

[0103] Secondly, this utility model also provides a fan, including a fan head, a support column 10, and a pitch adjustment mechanism 40 according to any of the above embodiments, wherein the pitch adjustment mechanism 40 pivotally connects the fan head to the support column 10.

[0104] The fan provided in this embodiment has the following advantages:

[0105] 1. Improve space utilization: The pitch adjustment mechanism is embedded inside the support column 10 through a slot, which improves the overall space utilization and ensures the feasibility of appearance adjustment.

[0106] 2. Simplified structure: The ball bearing 442, the column spring 441, and the second adjusting element 45 (i.e., the torsion spring) are integrated into the support column 10, which simplifies the overall structure and balances the forces on both sides, thereby improving the overall stability.

[0107] It should be noted that in this embodiment, the fan head is preferably adjusted manually by tilting the fan head. During tilting, the fan head will drive the bushing assembly to rotate synchronously. The first bushing 41 and the second bushing 42 are installed in the support column 10 through a clearance fit between the shaft holes. They are connected to the fan head by the insertion protrusions and snap-fit ​​positions on the back. The positioning protrusion 4011 of the shaft body 401 of the first bushing 41 and the positioning groove 4012 of the shaft body 401 of the second bushing 42 cooperate to form a fastening position. The middle hole is connected by bolts. When the fan head is tilted, the first bushing 41 and the second bushing 42 rotate coaxially within the support column 10. The ball bearing 442 and the torsion spring inside the bushing form a tilt adjustment mechanism, which can realize the stable operation of the single-axis support table fan tilt mechanism.

[0108] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the protection scope of the embodiments of this application.

Claims

1. A pitch adjustment mechanism for pivotally connecting the machine head and the support column (10), characterized in that, The pitch adjustment mechanism (40) is at least partially integrated within the support column (10); The support column (10) includes a support column body (101) and a mounting portion (102) located at the upper end of the support column body (101). The pitch adjustment mechanism (40) includes: The bushing assembly includes a first bushing (41) and a second bushing (42), each of which includes a shaft body portion (401) and a limiting portion (402). The shaft body portion (401) of the first bushing (41) and the shaft body portion (401) of the second bushing (42) are rotatably inserted into the mounting portion (102) and connected to each other. The limiting portion (402) of the first bushing (41) and the limiting portion (402) of the second bushing (42) are limited to the two outer sides of the mounting portion (102) and respectively fixedly connected to the machine head.

2. The pitch adjustment mechanism according to claim 1, characterized in that, The first bushing (41) has a locating rib (4011) on one of the shaft body portion (401) and the second bushing (42) has a locating groove (4012). The first bushing (41) and the second bushing (42) are positioned and limited in the circumferential direction by the convex-concave fit of the positioning rib (4011) and the positioning groove (4012).

3. The pitch adjustment mechanism according to claim 1, characterized in that, Both the shaft body portion (401) of the first bushing (41) and the shaft body portion (401) of the second bushing (42) are provided with connecting holes (400); The bushing assembly also includes a fastener that passes through and connects between the connecting holes (400) of the first bushing (41) and the second bushing (42).

4. The pitch adjustment mechanism according to any one of claims 1 to 3, characterized in that, One of the outer periphery of the shaft body portion (401) of the first bushing (41) and the inner periphery of the mounting portion (102) is provided with a limiting groove (411), and the other is provided with a limiting boss (1021); During the pitching process of the machine head, the limiting boss (1021) slides relative to the limiting slide groove (411) and can limit the pitching angle of the machine head.

5. The pitch adjustment mechanism according to claim 4, characterized in that, The limiting groove (411) is a groove structure formed on the outer peripheral wall of the shaft part (401) of the first bushing (41), and the limiting boss (1021) is fixedly arranged on the inner peripheral wall of the mounting part (102). The limiting slide (411) includes a slide body (4111) and a groove opening (4112). The groove opening (4112) connects the end face of the shaft body (401) of the first bushing (41) and the slide body (4111). The limiting boss (1021) enters the slide body (4111) through the groove opening (4112) and is limited within the slide body (4111).

6. The pitch adjustment mechanism according to any one of claims 1 to 3, characterized in that, The pitch adjustment mechanism (40) includes: The adjustment component has a mounting groove on the mounting part (102) for accommodating the adjustment component. The adjustment component is disposed in the mounting groove and abuts against the bushing assembly so that the head is stabilized at a set pitch angle.

7. The pitch adjustment mechanism according to claim 6, characterized in that, The adjustment component includes: The first adjusting member (44) is provided in the mounting groove, which includes a first mounting groove (1022) disposed on one end face of the mounting part (102) near the first bushing (41), and the first adjusting member (44) is disposed in the first mounting groove (1022). One end of the first adjusting member (44) abuts against the mounting part (102), and the other end extends and abuts against the first bushing (41). During the pitching process of the machine head, it can extend into the positioning hole (431) directly or indirectly provided on the first bushing (41) to position the machine head at the set pitch angle.

8. The pitch adjustment mechanism according to claim 6, characterized in that, The adjustment component further includes: The second adjusting member (45) includes a second mounting groove (1023), which is disposed on the end face of the mounting part (102) near the second bushing (42). The second adjusting member (45) is embedded in the second mounting groove (1023), and its two ends abut against the mounting part (102) and the second bushing (42) respectively. The second adjusting member (45) is used to apply an upward rotational support force to the second bushing (42) during the pitching process of the machine head.

9. The pitch adjustment mechanism according to any one of claims 1 to 3, characterized in that, The first bushing (41) and the second bushing (42) are fixedly connected to the machine head by means of plugging and / or snapping.

10. A fan, characterized in that, It includes a nose cone, a support column (10), and a pitch adjustment mechanism (40) as described in any one of claims 1 to 9, wherein the pitch adjustment mechanism (40) pivotally connects the nose cone to the support column (10).

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