Automatic tensioning mechanism and photovoltaic sweeper

Abstract

An automatic tensioning mechanism is applied to a machine head driving device of a photovoltaic sweeper, the machine head driving device comprises a machine shell, a plurality of gears positioned on the machine shell and a chain wound on the gears, and the machine head driving device comprises a first block body, a second block body and an elastic piece. The first block body is used for being fixed to a machine shell of the machine head driving device, and the second block body can do telescopic motion relative to the first block body under the elastic force effect of the elastic piece so as to be used for automatic tensioning of the chain. The utility model further relates to a photovoltaic sweeper which comprises the automatic tensioning mechanism. According to the automatic tensioning device, the automatic tensioning effect can be guaranteed without manual operation, and convenience is improved.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic cleaning, in particular to an automatic tensioning mechanism and a photovoltaic cleaning machine. Background Art

[0002] Existing photovoltaic sweepers have two basic transmission methods: gear transmission and chain transmission. Each of these transmission methods has its own advantages and disadvantages. Chain transmission has the advantages of high transmission torque and low price, but there is a risk of the chain loosening after long-term operation, resulting in chain detachment. Therefore, photovoltaic sweepers using chain transmission are generally designed with a chain tensioning device to reduce the risk of the chain loosening after long-term operation. Chain tensioning devices are divided into two types: automatic tensioning and manual tensioning. Manual tensioning devices require manual adjustment, which is cumbersome and difficult to operate, making their application in photovoltaic sweepers unrealistic. Utility Model Content

[0003] The purpose of the utility model is to provide an automatic tensioning mechanism and a photovoltaic sweeper, which can ensure the automatic tensioning effect without human operation and increase convenience.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solution 1: an automatic tensioning mechanism, used in the head drive device of a photovoltaic sweeper, the head drive device includes a casing, a plurality of gears positioned on the casing and a chain wound around the gears, including a first block, a second block and an elastic member, the first block is used to be fixed on the casing of the head drive device, under the elastic force of the elastic member, the second block can perform telescopic movement relative to the first block, thereby being used for automatic tensioning of the chain.

[0005] As a further improved technical solution 1 of the present invention, it also includes a first bolt member for positioning the elastic member, the elastic member is sleeved on the outer periphery of the first bolt member, the top end of the elastic member abuts against the first block and the bottom end of the elastic member can abut against the second block, so that the elastic member is clamped between the first block and the second block to provide elastic force.

[0006] As a further improved technical solution 1 of the present invention, the first bolt member includes a cap portion, a rod portion and an end portion, the cap portion and the end portion are respectively located at opposite ends of the rod portion, and a step is formed at the connection between the end portion and the rod portion; the bottom end of the elastic member can abut against the step to prevent the elastic member from falling out downward from the first bolt member.

[0007] As a further improved technical solution 1 of the present invention, the second block includes a groove that allows the end head to be locked into position. When the elastic part is sleeved on the rod of the first bolt part, the end head is locked into the groove and positioned, connecting the first bolt part and the second block into a whole that can move together.

[0008] As a further improved technical solution 1 of the present invention, the first block includes a first sub-block and a second sub-block which are separately arranged, the second block includes a third sub-block and a fourth sub-block which are separately arranged, the first sub-block is arranged above the second sub-block at intervals, the second sub-block is provided with a receiving cavity with openings at both ends, the third sub-block is positioned in the receiving cavity and partially exposed downward outside the receiving cavity, the fourth sub-block is fixed to the third sub-block and is completely exposed outside the receiving cavity, the first bolt member passes through the first sub-block and is positioned with the third sub-block; it also includes a second bolt member and a third bolt member, the first sub-block and the second sub-block are connected by the second bolt member, and the third sub-block and the fourth sub-block are connected by the third bolt member.

[0009] As a further improved technical solution 1 of the present invention, the first sub-block is a straight line extending in the left-right direction, and includes a plurality of through holes arranged in sequence along the left-right direction and passing through in the up-down direction, and the through holes are respectively used to allow the first bolt member and the second bolt member to pass through.

[0010] As a further improved technical solution 1 of the present invention, the second sub-block includes a first main body and two mounting parts protruding from both sides of the first main body in the left and right directions, the first main body includes side walls and bottom walls extending integrally, the side walls and the bottom wall are arranged to form the receiving cavity, the two second bolt members are located outside the two sides of the receiving cavity and respectively pass through the two mounting parts one by one, and the second bolt members can also pass through the casing to fix the first sub-block and the second sub-block on the casing.

[0011] As a further improved technical solution 1 of the present invention, the third sub-block includes a second main body portion partially exposed outside the receiving cavity and two guide portions protruding from both sides of the second main body portion in the left and right directions, and the guide portions can slide along the side walls in the receiving cavity and abut against the bottom wall.

[0012] As a further improved technical solution 1 of the present invention, the fourth sub-block is provided with a receiving chamber with at least one end open, and the third sub-block can extend into the third sub-block, which includes a second main body part partially exposed outside the receiving chamber and two guide parts protruding from both sides of the second main body part in the left and right directions. The guide parts can slide along the side walls and abut against the bottom wall in the receiving chamber, and the third bolt member passes through the third sub-block and the fourth sub-block along the front-to-back direction perpendicular to the left and right directions and the up-down directions to fix the third sub-block and the fourth sub-block.

[0013] To achieve the above-mentioned purpose, the present invention adopts the following technical solution 2: a photovoltaic sweeper, including a head drive device and the automatic tensioning mechanism as described above, the head drive device includes a housing, a plurality of gears positioned on the housing and a chain wound around the gears, the automatic tensioning mechanism acts on the chain through the elastic force of the elastic member, thereby being able to provide the chain with automatic tensioning force.

[0014] Compared with the existing technology, the automatic tensioning mechanism in the photovoltaic sweeper of the utility model uses the elastic force of the elastic part to enable the second block to perform telescopic movement relative to the first block, thereby being used for automatic tensioning of the chain. The chain can be automatically tensioned without human operation, and the external dimensions are small, the price is lower, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a partial three-dimensional assembly diagram of the head drive device of the photovoltaic sweeper of the present invention;

[0016] Figure 2 This is the main view of the automatic tensioning mechanism of the utility model;

[0017] Figure 3 This is a three-dimensional exploded view of the automatic tensioning mechanism of the utility model;

[0018] Figure 4 This is a top view of the automatic tensioning mechanism of the utility model;

[0019] Figure 5 This utility model is an automatic tensioning mechanism along Figure 4 Cross-sectional view at the center AA line and in the retracted state;

[0020] Figure 6 This utility model is an automatic tensioning mechanism along Figure 4 Cross-sectional view of the center AA line and in the extended state;

[0021] Figure 7 yes Figure 1 The main view;

[0022] Figure 8 yes Figure 7 Enlarged view of part B;

[0023] Figure 9 This is a cross-sectional view of the first sub-block and the second sub-block of the automatic tensioning mechanism of the present invention connected as a whole by a second bolt, that is, a first component assembly state fixed relative to the housing;

[0024] Figure 10 It is a cross-sectional view of the automatic tensioning mechanism of the present invention, in which the remaining components except the first sub-block, the second sub-block and the second bolt are connected as a whole, that is, a second component assembly state that is movable relative to the housing. DETAILED DESCRIPTION

[0025] The following exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. If there are several specific embodiments, the features of these embodiments can be combined with each other without conflict. When the description refers to the drawings, unless otherwise specified, the same numbers in different drawings represent the same or similar elements. The contents described in the following exemplary embodiments do not represent all embodiments consistent with the present invention; rather, they are merely examples of devices, products and / or methods that are consistent with some aspects of the present invention and are described in the claims of the present invention.

[0026] The terms used in this utility model are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of this utility model. The singular forms "a", "the" or "the" used in the specification and claims of this utility model are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0027] It should be understood that the words used in the specification and claims of the present invention, such as "first", "second" and similar words, do not indicate any order, quantity or importance, but are only used to distinguish the names of features. Similarly, "one" or "an" and similar words do not indicate a quantity limitation, but rather indicate the existence of at least one. Unless otherwise specified, the words "front", "back", "upper", "lower" and similar words that appear in the present invention are only for the convenience of description and are not limited to a specific position or a spatial orientation. Words such as "include" or "comprises" are open-ended expressions, meaning that the elements appearing before "include" or "comprises" include the elements appearing after "include" or "comprises" and their equivalents, which does not exclude that the elements appearing before "include" or "comprises" may also include other elements. If "several" appears in the present invention, it means two or more.

[0028] Please refer to Figures 1 to 10 As shown, the present invention discloses an automatic tensioning mechanism 100, which is used in a head drive device 200 of a photovoltaic sweeper. The head drive device 200 includes a housing 201, a plurality of gears 202 positioned on the housing 201, and a chain 203 wound around the gears 202. The automatic tensioning mechanism 100 of the present invention includes a first block 1, a second block 2, and an elastic member 3. The first block 1 is used to be fixed to the housing 201 of the head drive device 200. Under the elastic force of the elastic member 3, the second block 2 can perform telescopic movement relative to the first block 1, thereby being used for automatic tensioning of the chain 203.

[0029] Please refer to Figure 2 、 Figure 3 and Figure 10 The automatic tensioning mechanism 100 of the present invention further includes a first bolt member 4 for positioning the elastic member 3. The elastic member 3 is sleeved around the outer periphery of the first bolt member 4. The top end of the elastic member 3 abuts the first block 1, and the bottom end of the elastic member 3 can abut the second block 2, thereby clamping the elastic member 3 between the first block 1 and the second block 2 to provide elastic force. In a specific embodiment, the elastic member 3 is a coil spring.

[0030] Please refer to Figure 3 and Figure 10 The first bolt member 4 includes a cap 41, a stem 42, and an end portion 43. The cap 41 and the end portion 43 are located at opposite ends of the stem 42, with a step 40 formed at the junction between the end portion 43 and the stem 42. The bottom end of the elastic member 3 can abut against the step 40. Therefore, the first bolt member 4 not only serves to position the elastic member 3 but also has the beneficial effect of preventing the elastic member 3 from falling downward from the first bolt member 4.

[0031] Please refer to Figure 3 、 Figure 5 、 Figure 6 and Figure 10The second block 2 includes a groove 210 that allows the end portion 43 to be locked into position. When the elastic member 3 is mounted on the rod 42 of the first bolt member 4, the end portion 43 is locked into the groove 210, connecting the first bolt member 4 and the second block 2 into a unit that can move together. In a specific embodiment, the outer surface of the end portion 43 is threaded, and the inner wall of the groove 210 is threaded, and the position is locked through the threaded engagement. The groove 210 also extends a certain length in the vertical direction. Therefore, by adjusting the locking depth of the end portion 43 of the elastic member 3 within the groove 210, the tension of the chain 203 can be adjusted to a greater extent.

[0032] Please refer to Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 9 and Figure 10 The first block 1 includes a first sub-block 11 and a second sub-block 12, which are separately arranged. The second block 2 includes a third sub-block 21 and a fourth sub-block 22, which are separately arranged. The first sub-block 11 is spaced apart and arranged above the second sub-block 12. The second sub-block 12 is provided with a receiving cavity 120 with openings at both ends. The third sub-block 21 is positioned within the receiving cavity 120 and partially exposed downwardly outside the receiving cavity 120. The fourth sub-block 22 is fixed to the third sub-block 21 and completely exposed outside the receiving cavity 120. The first bolt 4 passes through the first sub-block 11 and is positioned with the third sub-block 21. The first sub-block 11 can be called a fixed block, which plays a role of fixing the housing 201; the second sub-block 12 can be called a guide block, which plays a role of limiting and guiding the third sub-block 21; during the forward and reverse rotation of the chain 203, the chain 203 will have a torsional force, and the third sub-block 21 can be called a support block, which plays a supporting role on the torsional force of the chain 203; the fourth sub-block 22 can be called a tensioning block, which is used to directly tension the chain 203, and therefore wear-resistant plastic is usually used.

[0033] Please refer to Figure 3 、 Figure 5 、 Figure 6 、 Figure 9 and Figure 10The automatic tensioning mechanism 100 of the present invention further includes a second bolt member 5 and a third bolt member 6. The first sub-block 11 and the second sub-block 12 are connected by the second bolt member 5, and the third sub-block 21 and the fourth sub-block 22 are connected by the third bolt member 6. Therefore, during the tensioning adjustment process of the automatic tensioning mechanism 100 of the present invention, the first sub-block 11 and the second sub-block 12 are fixed to the housing 201 by the second bolt member 5 and are stationary; the third sub-block 21 and the fourth sub-block 22 are fixedly connected as a whole by the third bolt member 6, and these two components are movable during the tensioning adjustment process of the automatic tensioning mechanism 100 of the present invention.

[0034] Please refer to Figure 3 and Figure 9 , combined with Figure 5 and Figure 6 The first sub-block 11 is linear and extends in the left-right direction. It includes a plurality of through-holes 110 spaced apart in the left-right direction and extending vertically therethrough. The through-holes 110 are respectively used to pass through the first bolt member 4 and the second bolt member 5. The through-holes 110 include a first through-hole 1011 located in the center of the first sub-block 11 and second through-holes 1012 located at opposite ends of the first sub-block 11. The number of the first through-hole 1011 is at least one, and in a specific embodiment, two. The two elastic members 3 passing through the two first through-holes 1011 can provide a stronger and more balanced elastic effect. To ensure the fixation between the first sub-block 11 and the second sub-block 12, the number of the second through-holes 1012 is set to two.

[0035] Please continue to refer to Figure 3 and Figure 9 , combined with Figures 5 to 8 The second sub-block 12 includes a first main body 121 and two mounting portions 122 protruding from both sides of the first main body 121 in the left-right direction. The first main body 121 includes a side wall 1211 and a bottom wall 1212 extending integrally, and the side wall 1211 and the bottom wall 1212 enclose the receiving cavity 120. Figure 9 The two second bolt members 5 are located outside the two sides of the receiving cavity 120 and pass through the two mounting portions 122 in a one-to-one correspondence. Figure 8 The second bolt member 5 can also pass through the housing 201 to fix the first sub-block 11 and the second sub-block 12 on the housing 201. Therefore, the first sub-block 11 and the second sub-block 12 are connected and fixed to the housing 201 by the second bolt member 5 and are stationary.

[0036] Please refer to Figure 3 and Figure 10 , combined with Figure 5 and Figure 6 The third sub-block 21 includes a second main body 211 partially exposed outside the receiving cavity 120 and two guide portions 212 protruding from both sides of the second main body 211 in the left-right direction. The guide portions 212 can slide along the side walls 1211 within the receiving cavity 120 and abut against the bottom wall 1212. Therefore, under the elastic force of the elastic member 3 and the guidance of the guide portions 212, the third sub-block 21 slides up and down relative to the second sub-block 12.

[0037] Please continue to refer to Figure 3 and Figure 10 , combined with Figure 5 and Figure 6 The fourth sub-block 22 is provided with a receiving chamber 220 with at least one end open, and the third sub-block 21 can extend into the receiving chamber 220. The third bolt member 6 passes through the third sub-block 21 and the fourth sub-block 22 along the front-to-back direction perpendicular to the left-right direction and the up-down direction to fix the third sub-block 21 and the fourth sub-block 22.

[0038] In a specific embodiment, the third sub-block 21 included in the second block 2 primarily serves as a support, and is therefore typically made of metal to provide better support. The fourth sub-block 22 included in the second block 2 directly contacts the chain 203 for tensioning, and is therefore typically made of wear-resistant plastic. Of course, in other embodiments, where wear resistance is not a concern, the second block 2 may also not include the fourth sub-block 22, and may instead directly utilize the third sub-block 21 to contact the chain 203.

[0039] Please refer to Figures 1 to 10 A photovoltaic sweeper is characterized in that it includes a head drive device 200 and the automatic tensioning mechanism 100 described above, the head drive device 200 includes a housing 201, a plurality of gears 202 positioned on the housing 201 and a chain 203 wound around the gears 202, and the automatic tensioning mechanism 100 acts on the chain 203 through the elastic force of the elastic member 3, thereby being able to provide the chain 203 with automatic tensioning force.

[0040] To sum up, compared with the existing technology, the automatic tensioning mechanism and photovoltaic sweeper of the present invention, through the elastic force of the elastic member 3, enable the second block 2 to perform telescopic movement relative to the first block 1, thereby being used for automatic tensioning of the chain 203, and can achieve the automatic tensioning effect of the chain 203 without human operation; the automatic tensioning mechanism of the present invention has a small outer size and is easy to install. It can automatically tension and does not require manual adjustment after installation, and is cheaper, thereby reducing costs.

[0041] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of the present invention should be based on technical personnel in the relevant technical field. Although this specification has described the present invention in detail with reference to the above embodiments, ordinary technical personnel in the field should understand that technical personnel in the relevant technical field can still modify or replace the present invention with equivalents, and all technical solutions and improvements that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An automatic tensioning mechanism (100) is used in a head drive device (200) of a photovoltaic sweeper, wherein the head drive device (200) comprises a housing (201), a plurality of gears (202) positioned on the housing (201), and a chain (203) wound around the gears (202), and is characterized in that: The invention comprises a first block (1), a second block (2) and an elastic member (3), wherein the first block (1) is used to be fixed on the housing (201) of the head drive device (200), and under the elastic force of the elastic member (3), the second block (2) can perform telescopic movement relative to the first block (1), thereby being used for automatic tensioning of the chain (203).

2. The automatic tensioning mechanism (100) according to claim 1, characterized in that: The elastic member (3) is also provided with a first bolt member (4) for positioning the elastic member (3). The elastic member (3) is sleeved on the outer periphery of the first bolt member (4). The top end of the elastic member (3) abuts against the first block (1) and the bottom end of the elastic member (3) can abut against the second block (2), so that the elastic member (3) is clamped between the first block (1) and the second block (2) to provide elastic force.

3. The automatic tensioning mechanism (100) according to claim 2, characterized in that: The first bolt member (4) comprises a cap portion (41), a rod portion (42) and an end portion (43); the cap portion (41) and the end portion (43) are respectively located at opposite ends of the rod portion (42); a step (40) is formed at the connection between the end portion (43) and the rod portion (42); the bottom end of the elastic member (3) can abut against the step (40) to prevent the elastic member (3) from falling off downward from the first bolt member (4).

4. The automatic tensioning mechanism (100) according to claim 3, characterized in that: The second block (2) includes a groove (210) that allows the end portion (43) to be locked into position. When the elastic member (3) is sleeved on the rod (42) of the first bolt member (4), the end portion (43) is locked into the groove (210) and positioned, connecting the first bolt member (4) and the second block (2) into a whole that can move together.

5. The automatic tensioning mechanism (100) according to claim 2, characterized in that: The first block (1) includes a first sub-block (11) and a second sub-block (12) which are separately arranged; the second block (2) includes a third sub-block (21) and a fourth sub-block (22) which are separately arranged; the first sub-block (11) is spaced apart and arranged above the second sub-block (12); the second sub-block (12) is provided with a receiving cavity (120) which is open at both ends; the third sub-block (21) is positioned in the receiving cavity (120) and partially exposed downward outside the receiving cavity (120); the fourth sub-block (22) is fixed to the third sub-block (21) and completely exposed outside the receiving cavity (120); the first bolt (4) passes through the first sub-block (11) and is positioned with the third sub-block (21); The first sub-block (11) and the second sub-block (12) are connected via the second bolt (5), and the third sub-block (21) and the fourth sub-block (22) are connected via the third bolt (6).

6. The automatic tensioning mechanism (100) according to claim 5, characterized in that: The first sub-block (11) is linear and extends in the left-right direction, and comprises a plurality of through holes (110) arranged in sequence and spaced apart in the left-right direction and penetrating in the up-down direction. The through holes (110) are respectively used to allow the first bolt member (4) and the second bolt member (5) to pass through.

7. The automatic tensioning mechanism (100) according to claim 5, characterized in that: The second sub-block (12) includes a first main body (121) and two mounting portions (122) protruding from both sides of the first main body (121) in the left-right direction. The first main body (121) includes a side wall (1211) and a bottom wall (1212) extending integrally. The side wall (1211) and the bottom wall (1212) surround and form the receiving cavity (120). The two second bolt members (5) are located outside the two sides of the receiving cavity (120) and pass through the two mounting portions (122) respectively. The second bolt members (5) can also pass through the housing (201) to fix the first sub-block (11) and the second sub-block (12) on the housing (201).

8. The automatic tensioning mechanism (100) according to claim 7, characterized in that: The third sub-block (21) comprises a second main body (211) partially exposed outside the receiving cavity (120) and two guide parts (212) protruding from both sides of the second main body (211) in the left-right direction, and the guide parts (212) can slide along the side wall (1211) in the receiving cavity (120) and abut against the bottom wall (1212).

9. The automatic tensioning mechanism (100) according to claim 5, characterized in that: The fourth sub-block (22) is provided with a receiving chamber (220) with at least one end open, the third sub-block (21) can extend into the receiving chamber (220), and the third bolt member (6) passes through the third sub-block (21) and the fourth sub-block (22) along a front-to-rear direction perpendicular to the left-right direction and the up-down direction to fix the third sub-block (21) and the fourth sub-block (22).

10. A photovoltaic cleaning machine, characterized in that: The invention comprises a machine head driving device (200) and an automatic tensioning mechanism (100) as described in any one of claims 1 to 9 above, wherein the machine head driving device (200) comprises a housing (201), a plurality of gears (202) positioned on the housing (201), and a chain (203) wound around the gears (202); the automatic tensioning mechanism (100) acts on the chain (203) through the elastic force of the elastic member (3), thereby being able to provide the chain (203) with automatic tensioning force.

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