A shock-absorbing structure and a self-propelled device including the shock-absorbing structure

Abstract

The present invention discloses a shock-absorbing structure and a self-propelled device including the shock-absorbing structure. The shock-absorbing structure includes a housing, a motor cylinder (6) disposed in the housing for mounting a motor (4), and a damping tray (8) located in the housing. The damping tray (8) is disposed between the motor cylinder (6) and the inner wall of the housing. The damping tray (8) has a central through hole, and the motor cylinder (6) is disposed through the central through hole. A second elastic member (802) is disposed on the side wall surface of the central through hole, and the second elastic member (802) contacts the outer wall surface of the motor cylinder (6). In the present invention, shock-absorbing structures are respectively disposed between the middle and lower parts of the motor cylinder and the lower housing, and a positioning shock-absorbing structure is disposed between the upper part of the motor cylinder and the upper housing. Through the mutual cooperation of the upper, middle, and lower shock-absorbing structures, the motor cylinder is positioned and shock-absorbed in both the axial and circumferential directions, greatly improving the shock-absorbing effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of shock absorption, and particularly relates to a shock absorption structure and a self-propelled device including the shock absorption structure. Background Art

[0002] A mowing device cuts grass on the ground by driving a mowing device such as a cutter head, a blade or a whipping rope through a motor. Different grasslands require different mowing heights. Usually, the corresponding mowing height is adjusted by adjusting the height of the mowing device relative to the ground or the housing of the mowing device. To drive the mowing device at different heights, usually the driving motor of the mowing device needs to be installed in a motor cylinder that can move up and down. By the relative movement between the motor cylinder and the housing of the mowing device, the height relationship between the motor and the mowing device connected thereto and the device is adjusted.

[0003] However, a certain gap needs to be reserved for the relative movement between the motor cylinder and the housing of the mowing device. The gap will cause the motor cylinder and the housing to rub against each other during the operation of the motor, generating noise and vibration, which affects the use.

[0004] For example, Patent CN209359018U discloses an elastic member made of rubber material that abuts against the motor between the motor and the base of the lawn mower, which is used to reduce the noise during the mowing process of the lawn mower. However, this elastic member needs to be assembled separately, and the rubber material used is different from the material of the main body of the machine, increasing the additional cost. Summary of the Invention

[0005] The purpose of the present invention is to provide a shock absorption structure with a simple structure and good shock absorption effect, and a self-propelled device including the shock absorption structure.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A shock absorption structure includes a housing, a motor cylinder disposed in the housing for installing a motor, and the shock absorption structure further includes:

[0008] A damping tray located in the housing, the damping tray is disposed between the motor cylinder and the inner wall of the housing. The damping tray has a central through hole, the motor cylinder passes through the central through hole, and a second elastic member is disposed on the side wall surface of the central through hole, and the second elastic member contacts the outer wall surface of the motor cylinder.

[0009] Further, the damping tray is of an annular structure, and a plurality of circumferential through holes are formed in the circumferential direction on the main body of the annular structure, and one of the second elastic members is correspondingly disposed inside each circumferential through hole.

[0010] Further, the second elastic member is a convex portion integrally formed with the main body of the annular structure.

[0011] Further, the contact between the second elastic member and the outer wall surface of the motor cylinder is a surface contact.

[0012] Further, the housing includes an upper housing and a lower housing. The lower housing is provided with an upwardly protruding mounting seat. An installation hole for installing the motor cylinder is provided in the mounting seat, and the damping tray is located below the installation hole.

[0013] Further, the upper housing is provided with a downwardly protruding upper sub-cavity partition wall. The mounting seat includes a lower sub-cavity partition wall. The upper sub-cavity partition wall and the lower sub-cavity partition wall are butted to form a sub-cavity, and the motor cylinder is located in the sub-cavity.

[0014] Further, the mounting seat further includes a first elastic member. The first elastic member is arranged inside the lower sub-cavity partition wall and contacts the outer wall surface of the motor cylinder.

[0015] Further, the first elastic member is U-shaped. One end of the U-shape is fixedly connected to the lower sub-cavity partition wall, and the other end abuts against the outer wall surface of the motor cylinder.

[0016] Further, the first elastic member is integrally formed with the mounting seat.

[0017] Further, an installation post and a guide groove are provided in the mounting seat. A damping tray installation hole is provided on the damping tray. The installation post corresponds to the damping tray installation hole. A guide structure cooperating with the guide groove is provided on the outer wall of the motor cylinder. A notch cooperating with the guide structure is provided on the side wall of the central through hole of the damping tray. The guide structure can move up and down in the guide groove along the notch.

[0018] Further, a groove is provided on the damping tray. The groove is butted against the bottom of the guide groove. A limiting block is provided at the top of the guide structure. When the motor cylinder moves downward to the lowest position, the limiting block abuts against the damping tray.

[0019] Further, it further includes an adjusting member located in the sub-cavity and a positioning piece integrally formed with the upper housing. Rotating the adjusting member can adjust the position of the motor cylinder up and down. The positioning piece is arranged around the outer circumference of the adjusting member. A plurality of positioning grooves are arranged along the circumferential direction on the outer wall of the adjusting member. The positioning piece can be embedded in the positioning grooves.

[0020] Further, the positioning piece is elastic and there are a plurality of them. Each positioning piece includes an inward positioning protrusion, and the positioning protrusion can be embedded in the positioning groove.

[0021] A self-propelled device includes the damping structure as described above.

[0022] Further, the self - propelled device is an intelligent lawn mower, and the output shaft of the motor is connected to the mowing device.

[0023] Compared with the prior art, the remarkable advantages of the present invention are as follows:

[0024] (1) The first elastic member and the second elastic member of the present invention are integrally formed with the mounting seat and the motor mounting member respectively. The structure is simple and there is no need to additionally assemble elastic members. Moreover, when integrally formed, the elastic members are made of the same material (such as plastic) as the mounting seat and the motor mounting member, without the need to additionally use other materials to make elastic members, further reducing costs;

[0025] (2) Shock - absorbing structures are respectively arranged between the middle part and the lower part of the motor cylinder and the lower housing, and a positioning shock - absorbing structure is arranged between the upper part of the motor cylinder and the upper housing. Through the mutual cooperation of the shock - absorbing structures at the upper, middle and lower parts, the motor cylinder is positioned and shock - absorbed in both the axial and circumferential directions, greatly improving the shock - absorbing effect;

[0026] (3) The first elastic member adopts a U - shaped structure, and the second elastic member adopts a protruding part structure. It can be achieved only by improving the molds of the original mounting seat and the motor mounting member, without the need to re - mold. It can not only improve the shock - absorbing effect, but also reduce costs and reduce the assembly steps;

[0027] (4) The first elastic member adopts a U - shaped structure. On the one hand, it is convenient for integral forming. On the other hand, the contact between the first elastic member and the outer wall of the motor cylinder is surface contact, which can improve the shock - absorbing effect and avoid the wear problem of the outer wall of the motor cylinder caused by line contact;

[0028] (5) The second elastic member adopts a protruding part structure, and the contact between the protruding part structure and the outer wall of the motor cylinder is surface contact. On the one hand, it can improve the shock - absorbing effect, and on the other hand, it can avoid the wear problem of the outer wall of the motor cylinder caused by line contact;

[0029] (6) The shift - gear outer wheel seat is shock - absorbed and positioned by the positioning piece on the upper housing (the shock - absorption and positioning of the motor seat can be indirectly realized). At the same time, in cooperation with the first elastic member and the second elastic member to shock - absorb and position the motor cylinder, the overall shock - absorption and positioning of the motor adjustment mechanism can be achieved, avoiding excessive noise caused by vibration and changes in the mowing height during the mowing process. Description of the Drawings

[0030] Figure 1 It is an exploded view of the shock - absorbing structure of the intelligent lawn mower.

[0031] Figure 2 It is a schematic diagram of the damping tray mounting structure.

[0032] Figure 3 It is a top view of the damping tray.

[0033] Figure 4 It is a schematic diagram of the installation structure of the motor cylinder and the mounting seat.

[0034] Figure 5 It is a schematic sectional view of the height adjustment mechanism.

[0035] Figure 6 It is Figure 5 The enlarged view at position A in

[0036] Figure 7 It is Figure 5 The enlarged view at position B in

[0037] Figure 8 It is a schematic diagram of the upper housing structure.

[0038] Figure 9 It is Figure 8 The enlarged view at position C in

[0039] Figure 10 It is a schematic diagram of the shift outer wheel seat structure.

[0040] Figure 11 It is a sectional view of the installation of the height adjustment mechanism.

[0041] Figure 12 It is Figure 11 The enlarged view at position D in

[0042] In the figure: 1. Upper housing, 101. Upper sub-chamber isolation wall, 102. Auxiliary positioning cylinder, 103. Positioning piece, 2. Main chamber seal, 3. Shift outer wheel seat, 301. Striped protrusion, 302. Positioning groove, 4. Motor, 5. Sub-chamber seal, 6. Motor cylinder, 601. Guide structure, 602. Limit block, 7. Lower housing, 701. Mounting seat, 7011. Lower sub-chamber isolation wall, 7012. Mounting groove, 7013. First elastic member, 7014. Mounting post, 7015. Guide groove, 8. Damping tray, 801. Damping tray mounting hole, 802. Second elastic member, 803. Through hole, 804. Notch, 805. Groove, 9. Sub-chamber. Specific embodiments

[0043] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present invention, and are not used to limit the present invention.

[0044] The shock absorption structure of the present invention can be used in a variety of devices. In this embodiment, it is described by taking a smart lawn mower as an example.

[0045] Such as Figure 1 、 11As shown, the intelligent lawn mower is composed of a upper housing 1 and a lower housing 7 which are assembled by butting. A main cavity is formed between the upper housing 1 and the lower housing 7, and the upper housing 1 and the lower housing 7 are sealed by a main cavity seal 2.

[0046] The upper housing 1 is convexly provided with an upper sub-cavity partition wall 101 inward, and the lower housing 7 is convexly provided with a mounting seat 701 upward. A mounting hole for installing the motor cylinder 6 is provided at the center of the mounting seat 701.

[0047] As Figure 4-5 shown, the height adjustment mechanism includes an adjusting member and the motor cylinder 6. In this embodiment, the adjusting member is a gear shift outer wheel seat 3. The axial position of the gear shift outer wheel seat 3 is fixed and it can rotate around its own central axis. The angular position of the motor cylinder 6 is fixed and it can move axially. A mowing motor 4 is arranged inside the motor cylinder 6. The outer wheel seat 3 cooperates with the motor cylinder 6. Rotating the outer wheel seat 3 can drive the motor cylinder 6 to move axially, so as to adjust the position of the motor cylinder 6 in the vertical direction. The motor 4 is installed inside the motor cylinder 6, and the output shaft of the motor 4 is connected to the cutting disc. A guiding structure 601 is provided on the outer wall of the motor cylinder 6. As Figure 2 shown, a guiding groove 7015 is provided on the inner wall of the mounting hole of the mounting seat 701. The guiding structure 601 cooperates with the guiding groove 7015, so that the motor cylinder 6 can move up and down but cannot rotate. At the same time, the cooperation between the guiding structure 601 and the guiding groove 7015 makes it impossible for them to rotate with each other, so there will be no circumferential vibration. An external thread is provided on the upper outer wall of the motor cylinder 6, and an internal thread is provided on the inner wall of the gear shift outer wheel seat 3. The internal thread of the gear shift outer wheel seat 3 cooperates with the external thread of the motor cylinder 6 to adjust the height of the motor cylinder 6. When the gear shift outer wheel seat 3 is rotated, the up and down movement of the motor cylinder 6 can be realized, so as to realize the up and down movement of the motor 4, and be used to realize the height adjustment of the cutting disc.

[0048] As Figure 4 、 6 shown, the specific structure of the mounting seat 701 is: the mounting seat 701 includes a lower sub-cavity partition wall 7011, a mounting groove 7012 and a first elastic member 7013.

[0049] Combined with Figure 5 、 11 , the upper sub-cavity partition wall 101 and the lower sub-cavity partition wall 7011 are butted to form a sub-cavity, and the motor cylinder 6 and the gear shift outer wheel seat 3 are installed in the sub-cavity.

[0050] An installation groove 7012 is provided on the inner side of the top end of the lower sub-cavity partition wall 7011. The upper sub-cavity partition wall 101 is inserted into the installation groove 7012, and a sub-cavity seal 5 is provided in the installation groove 7012 to seal the gap between the upper sub-cavity partition wall 101 and the lower sub-cavity partition wall 7011.

[0051] As Figure 2 、 3As shown in FIGS. 5 and 7, a damping tray 8 is provided at the lower part of the mounting seat 7 for restricting the lowest position of the motor cylinder 6 from descending. Specifically, the damping tray 8 is installed between the lower parts of the motor cylinder 6 and the lower sub-cavity isolation wall 7011, and the damping tray 8 is connected to the mounting posts 7014 on the mounting seat 701 through the mounting holes 801.

[0052] As Figure 4 shown, a limiting block 602 is provided at the top of the guiding structure 601. As Figure 3 shown, multiple pairs of grooves 805 and multiple notches 804 are provided circumferentially on the damping tray 8. Each pair of grooves 805 is respectively butted against the bottoms of the multiple guiding grooves 7015 of the mounting seat 701. The guiding structure 601 can move up and down in the notches 804. When the motor cylinder 6 moves downward to the lowest position, the limiting block 602 abuts against the damping tray 8.

[0053] As Figure 3 and 7 shown, the damping tray 8 is a ring-shaped structure body. A plurality of through holes 803 are provided circumferentially on the ring-shaped structure body. In this embodiment, the through holes 803 are arc-shaped through holes. In other embodiments, the shapes of the through holes can be circular, rectangular or other shapes, and the hollow shapes can all achieve the technical effects of this patent. A second elastic member 802 is provided at the inner side position of the arc-shaped through hole on the ring-shaped structure body. The second elastic member 802 is a convex portion integrally formed with the ring-shaped structure body. The materials of the second elastic member 802 and the ring-shaped structure body are both plastics. The outer side body of the arc-shaped through hole 803 abuts against the inner wall of the mounting seat 701, and the second elastic member 802 abuts against the outer wall of the motor cylinder 6 for damping the motor cylinder.

[0054] Preferably, the contact between the second elastic member 802 and the outer wall of the motor cylinder 6 is surface contact, which can avoid the problem of wear on the outer wall of the motor cylinder 6 caused by line contact. Moreover, compared with the line contact used when the second elastic member 802 is used alone, the surface contact can further improve its damping effect.

[0055] As Figure 4-6 shown, a first elastic member 7013 is provided inside the mounting groove 7012. The first elastic member 7013 is U-shaped. One end of the U-shape is fixedly connected to the mounting groove 7012 or fixedly connected to the lower sub-cavity isolation wall 7011, and the other end of the U-shape abuts against the outer wall of the motor cylinder 6. In this embodiment, the first elastic member 7013 is integrally formed with the mounting seat 701 and does not require separate assembly.

[0056] As Figure 8-9As shown, an upper sub-cavity isolation wall 101 is provided in the upper shell 1, an auxiliary positioning cylinder 102 is provided in the upper sub-cavity isolation wall 101, and a positioning piece 103 is provided on the side wall of the auxiliary positioning cylinder 102. The positioning piece 103 is a sheet with a certain elasticity, and an inward protrusion is provided on the positioning piece 103. The positioning piece 103 is evenly arranged around the auxiliary positioning cylinder 102. In this embodiment, two positioning pieces 103 are provided, and the positioning pieces 103 are integrally formed with the upper shell 1 and are both made of plastic material.

[0057] like Figure 10 As shown, the shift outer wheel seat 3 is a cover-like structure with an opening at the lower end. Vertical strip-shaped protrusions 301 are evenly arranged around the outer circumference of the shift outer wheel seat 3 , and positioning grooves 302 are formed between adjacent strip-shaped protrusions 301 .

[0058] like Figure 11-12 As shown, the shift outer wheel seat 3 is embedded in the upper cavity 101 and inserted into the auxiliary positioning cylinder 102. The protrusion on the positioning piece 103 is embedded in the positioning groove 302 to assist in angular positioning and fixation. When the shift outer wheel seat 3 rotates, the positioning piece 103 will be squeezed to the sides by the positioning protrusion under the force applied by the user, which will not affect the rotation. When the user rotates it to the appropriate position, the positioning piece 103 will re-engage in the positioning groove 302, helping to fix the shift outer wheel seat 3, preventing the outer wheel seat 3 from rotating due to machine vibration during operation, resulting in changes in mowing height, and playing a shock-absorbing role for the shift outer wheel seat 3. At the same time, the positioning piece 103 assists in fixing the gear shift outer wheel seat 3, reducing the shaking and vibration during the rotation of the gear shift outer wheel seat 3, and also increases the feedback during the rotation of the gear shift outer wheel seat 3, thereby improving the user experience. Since the motor barrel 6 is closely matched with the gear shift outer wheel seat 3, the positioning piece 103 reduces the shaking and vibration during the rotation of the gear shift outer wheel seat 3 while indirectly realizing the positioning and shock absorption of the motor barrel 6.

[0059] In the present invention, shock-absorbing structures are respectively arranged between the middle and lower parts of the motor barrel 6 and the lower shell 7, and a positioning shock-absorbing structure is arranged between the upper part of the motor barrel 6 and the upper shell 1 (indirectly realized through the gear-shifting outer wheel seat 3 and the positioning piece 103). By cooperating with each other, the upper, middle and lower shock-absorbing structures, combined with the circumferential positioning of the guide structure 601 by the guide groove 7015 and the circumferential positioning of the gear-shifting outer wheel seat 3 by the positioning piece 103, the motor barrel is positioned and shock-absorbed in both axial and circumferential directions, thereby greatly improving the shock-absorbing effect.

[0060] Those of ordinary skill in the art can understand that the foregoing is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A shock-absorbing structure, comprising a housing and a motor cylinder (6) disposed within the housing for mounting a motor (4), characterized in that, The shock-absorbing structure further includes: A damping tray (8) located inside the housing. The damping tray (8) is disposed between the motor cylinder (6) and the inner wall of the housing. The damping tray (8) has a central through-hole, and the motor cylinder (6) passes through the central through-hole. A second elastic member (802) is provided on the side wall surface of the central through-hole, and the second elastic member (802) contacts the outer wall surface of the motor cylinder (6); The housing includes an upper housing (1) and a lower housing (7). The lower housing (7) is provided with an upward protruding mounting seat (701). An installation hole for installing the motor cylinder (6) is formed in the mounting seat (701), and the damping tray (8) is located below the installation hole; An installation post (7014) and a guide groove (7015) are provided in the mounting seat (701). A damping tray installation hole (801) is provided on the damping tray (8). The installation post (7014) corresponds to the damping tray installation hole (801). A guide structure (601) cooperating with the guide groove (7015) is provided on the outer wall of the motor cylinder (6). A notch (804) cooperating with the guide structure (601) is formed on the side wall of the central through-hole of the damping tray (8). The guide structure (601) can move up and down in the guide groove (7015) along the notch (804); The contact between the second elastic member (802) and the outer wall surface of the motor cylinder (6) is a surface contact.

2. The shock-absorbing structure according to claim 1, wherein The damping tray (8) is of an annular structure, and a plurality of circumferential through-holes (803) are formed in the annular structure body along the circumferential direction. A corresponding second elastic member (802) is provided inside each circumferential through-hole (803).

3. The shock-absorbing structure according to claim 2, wherein, The second elastic member (802) is a convex portion integrally formed with the annular structure body.

4. The shock-absorbing structure according to claim 1, characterized in that, The upper housing (1) is provided with a downward protruding upper sub-cavity isolation wall (101). The mounting seat (701) includes a lower sub-cavity isolation wall (7011). The upper sub-cavity isolation wall (101) and the lower sub-cavity isolation wall (7011) are butted to form a sub-cavity, and the motor cylinder (6) is located inside the sub-cavity.

5. The shock-absorbing structure according to claim 4, characterized in that, The mounting seat (701) further includes a first elastic member (7013). The first elastic member (7013) is disposed inside the lower sub-cavity isolation wall (7011), and the first elastic member (7013) contacts the outer wall surface of the motor cylinder (6).

6. The shock absorption structure according to claim 5, characterized in that, The first elastic member (7013) is U-shaped. One end of the U-shape is fixedly connected to the lower sub-cavity isolation wall (7011), and the other end abuts against the outer wall surface of the motor cylinder (6).

7. The shock absorption structure according to claim 5 or 6, characterized in that, The first elastic member (7013) is integrally formed with the mounting seat (701).

8. The shock-absorbing structure according to claim 1, wherein A groove (805) is formed on the damping tray (8). The groove (805) is butted against the bottom of the guide groove (7015). A limiting block (602) is provided at the top of the guide structure (601). When the motor cylinder (6) moves downward to the lowest position, the limiting block (602) abuts against the damping tray (8).

9. The shock absorption structure according to claim 4 or 5, characterized in that It further includes an adjusting member located in the auxiliary cavity and a positioning piece (103) integrally formed with the upper housing (1). Rotating the adjusting member can adjust the position of the motor cylinder (6) up and down. The positioning piece (103) is arranged on the circumferential outer side of the adjusting member. A plurality of positioning grooves (302) are arranged on the outer wall of the adjusting member along the circumference, and the positioning piece (103) can be embedded in the positioning grooves (302).

10. The shock-absorbing structure according to claim 9, characterized in that, The positioning piece (103) is elastic and there are a plurality of them. Each positioning piece (103) includes an inward positioning protrusion, and the positioning protrusion can be embedded in the positioning groove (302).

11. A self-propelled device, comprising the shock absorption structure according to any one of claims 1-10.

12. The self-propelled device according to claim 11, wherein, The self-propelled device is an intelligent lawn mower, and the output shaft of the motor (4) is connected to a mowing device.

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