Multi-gear transmission device and pliers

Abstract

The invention relates to the technical field of clamping appliances, in particular to a multi-gear transmission device and a clamp. The device comprises an annular gear ring, a first gear set and a second gear set. The annular gear ring is provided with a notch, a first tooth part and a second tooth part; the first gear set comprises a first gear and a second gear which are connected with each other, and when the first gear and the second gear pass through the notch, at least one of the first gear and the second gear is connected with the first tooth part; the second gear set comprises a third gear and a fourth gear which are connected with each other, and when the third gear and the fourth gear pass through the notch, at least one of the third gear and the fourth gear is connected with the second tooth part. According to the multi-gear transmission device and the clamp provided by the invention, a drilling tool can conveniently enter the annular gear ring through the notch, and a power source is provided by utilizing the transmission structure; and at least one gear is always engaged with the annular gear ring, so that continuous rotation of the transmission mechanism is ensured, and continuous work of equipment is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of clamping devices, and particularly to a multi-connected gear transmission device and a clamp. Background Art

[0002] Currently, for traditional clamps, whether manually operated or hydraulically driven, there are problems of inability to continuously rotate and power source configuration, resulting in complex structures and low working efficiency.

[0003] For example: The rotary tongs and impact tongs used in the related art for iron roughnecks are mostly designed in a split manner. The main reason is that they cannot rotate continuously and the power source cannot enter the inside of the clamp body. Although the body of the traditional automatic hydraulic clamp can rotate continuously, there is no power source entering the inside of the clamp body. The clamping of the clamp body adopts a mechanical climbing structure and cannot actively reset, which is prone to sticking the drill. Summary of the Invention

[0004] The present invention provides a multi-connected gear transmission device and a clamp to solve the defects in the related art that the clamp cannot rotate continuously and the power source cannot be arranged inside the clamp body.

[0005] The present invention provides a multi-connected gear transmission device, including: An annular gear ring having a notch extending along the circumferential path of the annular gear ring. The inner side of the annular gear ring has a first tooth portion, and the outer side of the annular gear ring has a second tooth portion; A first gear set including at least a first gear and a second gear connected to each other. The first gear set is connected to the first tooth portion, and when the first gear and the second gear pass through the notch, at least one of the first gear and the second gear is connected to the first tooth portion; A second gear set including at least a third gear and a fourth gear connected to each other. The second gear set is connected to the second tooth portion, and when the third gear and the fourth gear pass through the notch, at least one of the third gear and the fourth gear is connected to the second tooth portion.

[0006] According to the multi-connected gear transmission device provided by the present invention, the distance between the first gear and the second gear along the circumferential path of the annular gear ring is greater than the length of the notch along the circumferential path of the annular gear ring; the distance between the third gear and the fourth gear along the circumferential path of the annular gear ring is greater than the length of the notch along the circumferential path of the annular gear ring.

[0007] According to the multi-connected gear transmission device provided by the present invention, the first gear set further includes: a fifth gear connected to both the first gear and the second gear.

[0008] According to the multi-gear transmission device provided by the present invention, the first gear set further includes: a sixth gear and a seventh gear. The sixth gear is simultaneously connected to the fifth gear and the first gear; the seventh gear is simultaneously connected to the fifth gear and the second gear.

[0009] According to the multi-gear transmission device provided by the present invention, the second gear set further includes: an eighth gear, which is simultaneously connected to the third gear and the fourth gear.

[0010] According to the multi-gear transmission device provided by the present invention, the second gear set further includes: a ninth gear and a tenth gear. The ninth gear is simultaneously connected to the eighth gear and the third gear; the tenth gear is simultaneously connected to the eighth gear and the fourth gear.

[0011] According to the multi-gear transmission device provided by the present invention, the second gear set further includes: the first gear set further includes: a first chain, which is simultaneously connected to the first gear and the second gear; the second gear set further includes: a second chain, which is simultaneously connected to the third gear and the fourth gear.

[0012] According to the multi-gear transmission device provided by the present invention, it further includes: a driving unit and a gear pump. The driving unit is arranged on the outer side of the annular gear ring and is connected to the first gear set; the gear pump is arranged on the inner side of the annular gear ring and is connected to the second gear set.

[0013] According to the multi-gear transmission device provided by the present invention, it further includes: an accumulator, which is connected to the gear pump.

[0014] The present invention also provides a clamp, which includes: the multi-gear transmission device of the present invention.

[0015] A multi-connected gear transmission device provided by the present invention includes: an annular gear ring, a first gear set, and a second gear set. The annular gear ring has a notch that extends along the circumferential path of the annular gear ring. The inner side of the annular gear ring has a first tooth portion, and the outer side of the annular gear ring has a second tooth portion. The first gear set includes at least a first gear and a second gear connected to each other. The first gear set is connected to the first tooth portion, and when the first gear and the second gear pass through the notch, at least one of the first gear and the second gear is connected to the first tooth portion. The second gear set includes at least a third gear and a fourth gear connected to each other. The second gear set is connected to the second tooth portion, and when the third gear and the fourth gear pass through the notch, at least one of the third gear and the fourth gear is connected to the second tooth portion. The multi-connected gear transmission device provided by the present invention, through the improvement of the annular gear ring, is provided with a notch in the circumferential path direction, and through the transmission relationship between the first gear set, the second gear set and the annular gear ring, a motor / motor can be arranged outside the annular gear ring, which is convenient for the drill to enter the inside of the annular gear ring through the notch, and the above-mentioned transmission structure is used to provide a power source. In addition, through the improvement of the first gear set and the second gear set, both of them are at least composed of two gears connected to each other. When passing through the notch position of the annular gear ring, it is ensured that at least one gear is always engaged with the annular gear ring, thus ensuring the continuous rotation of the transmission mechanism and providing a guarantee for the continuous operation of the equipment.

[0016] Further, a clamp provided by the present invention includes the multi-connected gear transmission device in the above-mentioned embodiment of the present invention, and therefore has the same advantages as above. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the multi-connected gear transmission device provided in one of the embodiments of the present invention from the first perspective.

[0019] Figure 2 It is a schematic structural diagram of the multi-connected gear transmission device provided in one of the embodiments of the present invention from the second perspective.

[0020] Figure 3 It is a front view of the multi-connected gear transmission device provided in one of the embodiments of the present invention.

[0021] Figure 4 It is a schematic structural diagram of the first seat body, the second seat body, and the third seat body provided in one of the embodiments of the present invention.

[0022] Figure 5 It is a schematic diagram of the internal structures of the first seat body, the second seat body, and the third seat body provided in one embodiment of the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the inner enclosing plate provided in one embodiment of the present invention.

[0024] Reference numerals: 100: First gear set; 101: First gear; 102: Sixth gear; 103: Fifth gear; 104: Seventh gear; 105: Second gear; 200: Second gear set; 201: Third gear; 202: Ninth gear; 203: Eighth gear; 204: Tenth gear; 205: Fourth gear; 300: Ring gear; 301: First tooth portion; 302: Second tooth portion; 303: Notch; 400: First seat body; 500: Second seat body; 600: Third seat body; 601: Inner enclosing plate; 6011: Strip-shaped hole; 602: Top plate; 603: Bottom plate. Detailed implementation manners

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of this embodiment, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this embodiment and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this embodiment.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this embodiment, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In this embodiment, unless otherwise clearly defined and limited, terms such as "arranged", "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0029] In the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] The following Figures 1-6 describes a multi - gear transmission device of the present invention. The multi - gear transmission device includes: an annular gear ring 300, a first gear set 100, and a second gear set 200.

[0031] Among them, the annular gear ring 300 has a notch 303, the notch 303 extends along the circumferential path of the annular gear ring 300, the inner side of the annular gear ring 300 has a first tooth part 301, and the outer side of the annular gear ring 300 has a second tooth part 302; the first gear set 100 includes at least a first gear 101 and a second gear 105 connected to each other, the first gear set 100 is connected to the first tooth part 301, and when the first gear 101 and the second gear 105 pass through the notch 303, at least one of the first gear 101 and the second gear 105 is connected to the first tooth part 301; the second gear set 200 includes at least a third gear 201 and a fourth gear 205 connected to each other, the second gear set 200 is connected to the second tooth part 302, and when the third gear 201 and the fourth gear 205 pass through the notch 303, at least one of the third gear 201 and the fourth gear 205 is connected to the second tooth part 302.

[0032] Specifically, the annular gear ring 300 is provided with at least one notch 303 in its circumferential direction. Taking the case where one notch 303 is provided as an example, the notch 303 is an arc-shaped notch and extends along the circumferential direction of the annular gear ring, so that a gap is formed in the annular gear ring 300 at this position. Through this gap (i.e., the notch 303), the drill can enter conveniently. However, in the conventional transmission mechanism in the prior art, when passing through this gap, it cannot rotate continuously. Therefore, a split design is adopted. Although the power source of the hydraulic tong can ensure continuous operation, its power source cannot enter the inside of the tong body, resulting in a complex structure and lack of compactness.

[0033] Specifically, the first gear set 100 and the second gear set 200 are both transmission components connected to the annular gear ring 300. One of them is the driving gear set that drives the annular gear ring 300 to rotate, and the other is the driven gear set. In this embodiment, the second gear set 200 connected to the second tooth part 302 on the outer side of the annular gear ring 300 is the driving gear set, which is powered by a motor or a motor to drive the second gear set 200 to rotate, drive the annular gear ring 300 to rotate, and drive the first gear set 100 to rotate through the first tooth part 301 on the inner side of the annular gear ring 300, providing a power source inside the annular gear ring 300, thus meeting the need for the power source to enter the inside of the tong body.

[0034] In the conventional transmission mechanism in the prior art, due to the notch 303 on the annular gear ring 300, during its rotation, the gear set cannot cross the notch 303 for transmission, so it cannot rotate continuously, which affects the working continuity of the tong. To overcome the above problems, the present invention improves the structures of the first gear set 100 and the second gear set 200 as follows: The first gear set 100 is at least composed of two gears connected to each other, that is, the first gear 101 and the second gear 105 are connected to each other. When the first gear 101 and the second gear 105 do not pass through the notch 303, they are simultaneously engaged with the annular gear ring 300. When the first gear 101 and the second gear 105 cross the notch 303, at least one of the gears is engaged with the annular gear ring 300 to ensure the transmission stability between the two. Specifically, by limiting the distance between the first gear 101 and the second gear 105, ensuring that this distance is greater than the length of the notch 303, when one of the gears is located at the notch 303 position, the other gear is always connected to the first tooth part 301.

[0035] Similarly, the second gear set 200 is at least composed of two gears connected to each other, that is, the third gear 201 and the fourth gear 205 are connected to each other. When the third gear 201 and the fourth gear 205 do not pass through the notch 303, they are simultaneously engaged with the second tooth part 302 of the annular gear ring 300; when the third gear 201 and the fourth gear 205 straddle the notch 303, at least one of the gears is engaged with the annular gear ring 300 to ensure the transmission stability between the two. Specifically, the distance between the third gear 201 and the fourth gear 205 can be limited to ensure that the distance is greater than the length of the notch 303. When one of the gears is located at the notch 303, the other gear is always connected to the second tooth part 302.

[0036] It can be seen that through the improvement of the annular gear ring 300, a notch 303 is provided in the circumferential path direction thereof, and through the transmission relationship between the first gear set 100, the second gear set 200 and the annular gear ring 300, a motor / motor can be arranged outside the annular gear ring 300, which is convenient for the drill to enter the inside of the annular gear ring 300 through the notch 303 and use the above transmission structure to provide a power source; in addition, through the improvement of the first gear set 100 and the second gear set 200, both of them are at least composed of two gears connected to each other. When passing through the notch 303 position of the annular gear ring 300, at least one gear is always engaged with the annular gear ring 300, thereby ensuring the continuous rotation of the transmission mechanism and providing a guarantee for the continuous operation of the equipment.

[0037] A multi-gear transmission device provided by the present invention includes: an annular gear ring 300, a first gear set 100, and a second gear set 200. The annular gear ring 300 has a notch 303 that extends along the circumferential path of the annular gear ring 300. The inner side of the annular gear ring 300 has a first tooth portion 301, and the outer side of the annular gear ring 300 has a second tooth portion 302. The first gear set 100 at least includes a first gear 101 and a second gear 105 that are connected to each other. The first gear set 100 is connected to the first tooth portion 301, and when the first gear 101 and the second gear 105 pass through the notch 303, at least one of the first gear 101 and the second gear 105 is connected to the first tooth portion 301. The second gear set 200 at least includes a third gear 201 and a fourth gear 205 that are connected to each other. The second gear set 200 is connected to the second tooth portion 302, and when the third gear 201 and the fourth gear 205 pass through the notch 303, at least one of the third gear 201 and the fourth gear 205 is connected to the second tooth portion 302. The multi-gear transmission device provided by the present invention, through the improvement of the annular gear ring 300, has a notch 303 provided in the circumferential path direction thereof, and through the transmission relationship between the first gear set 100, the second gear set 200 and the annular gear ring 300, a motor / motor can be provided outside the annular gear ring 300, which is convenient for the drill to enter the inside of the annular gear ring 300 through the notch 303, and the above-mentioned transmission structure is used to provide a power source. In addition, through the improvement of the first gear set 100 and the second gear set 200, both of them are at least composed of two gears connected to each other. When passing through the notch 303 position of the annular gear ring 300, it is ensured that at least one gear is always meshed with the annular gear ring 300, thereby ensuring the continuous rotation of the transmission mechanism and providing a guarantee for the continuous operation of the equipment.

[0038] In one embodiment of the present invention, the distance between the first gear 101 and the second gear 105 on the circumferential path of the annular gear ring 300 is greater than the length of the notch 303 on the circumferential path of the annular gear ring 300. Specifically, by defining that the distance between the first gear 101 and the second gear 105 is greater than the length of the notch 303, it can be ensured that at least one of the two gears is meshed with the annular gear ring 300 when passing through the notch 303. It should be noted that providing one notch 303 on the annular gear ring 300 can meet the need for the drill to enter. Therefore, the distance between the gears does not need to consider the situation of setting multiple notches 303. Also, since the annular gear ring 300 is approximately circular (excluding the notch 303 structure), and the first tooth portion 301 formed thereby is also circular, the distance between the first gear 101 and the second gear 105 and the length of the notch 303 are calculated based on their circumferential paths on the annular gear ring 300. The following descriptions are all based on this standard.

[0039] In one embodiment of the present invention, the distance between the third gear 201 and the fourth gear 205 on the circumferential path of the annular gear ring 300 is greater than the length of the notch 303 on the circumferential path of the annular gear ring 300. Specifically, by defining that the distance between the third gear 201 and the fourth gear 205 is greater than the length of the notch 303, it can be ensured that at least one gear meshes with the annular gear ring 300 when the two gears pass through the notch 303. Also, since the annular gear ring 300 is approximately in the shape of a ring (excluding the notch 303 structure), the second tooth part 302 formed by it is also circular. Therefore, the distance between the third gear 201 and the fourth gear 205 and the length of the notch 303 are both calculated based on their circumferential paths on the annular gear ring 300. The following descriptions are all based on this standard.

[0040] It should be understood that since the first gear set 100 and the second gear set 200 are respectively located inside and outside the annular gear ring 300, when calculating the distance of the annular path, the inner diameter distance and the outer diameter distance should be considered. That is, when calculating the distance between the first gear 101 and the second gear 105 and the length of the notch 303, the inner diameter of the first tooth part 301 should be used as the standard. Similarly, when calculating the distance between the third gear 201 and the fourth gear 205 and the length of the notch 303, the outer diameter of the second tooth part 302 should be used as the standard.

[0041] Preferably, the distance between the first gear 101 and the second gear 105 on the circumferential path of the first tooth part 301 is greater than the length of the notch 303 on the circumferential path of the first tooth part 301; the distance between the third gear 201 and the fourth gear 205 on the circumferential path of the second tooth part 302 is greater than the length of the notch 303 on the circumferential path of the second tooth part 302.

[0042] It can be understood that the first tooth part 301 and the second tooth part 302 are multiple teeth arranged along the circumferential path of the annular gear ring 300, and the tooth shapes are adapted to each other to ensure the transmission requirements.

[0043] In one embodiment of the present invention, the first gear set 100 further includes: a fifth gear 103, which is connected to both the first gear 101 and the second gear 105 at the same time. In this embodiment, by arranging the fifth gear 103 between the first gear 101 and the second gear 105, the transmission between the two is realized. In addition, through the arrangement of the fifth gear 103, it can be ensured that the distance between the first gear 101 and the second gear 105 is greater than the length of the notch 303. When the diameter of the fifth gear 103 is greater than the length of the notch 303, the above requirements can be met.

[0044] In one embodiment of the present invention, the first gear set 100 further includes: a sixth gear 102 and a seventh gear 104. The sixth gear 102 is connected to both the fifth gear 103 and the first gear 101; the seventh gear 104 is connected to both the fifth gear 103 and the second gear 105. In this embodiment, the first gear set 100 is composed of five gears, namely, the first gear 101, the sixth gear 102, the fifth gear 103, the seventh gear 104, and the second gear 105 are sequentially meshed and connected to form a five-gear mechanism located inside the annular gear ring 300. When the five-gear mechanism does not pass through the notch 303 of the annular gear ring 300, the first gear 101 and the second gear 105 are always meshed with the first tooth portion 301. When passing through the notch 303 of the annular gear ring 300, it is ensured that at least one of the first gear 101 and the second gear 105 is meshed with the first tooth portion 301. The functions of the sixth gear 102, the fifth gear 103, and the seventh gear 104 are to ensure the linkage between the first gear 101 and the second gear 105, and to increase the distance between the two, so as to ensure that they can cross the notch 303 and mesh with the first tooth portion 301.

[0045] In one embodiment of the present invention, the second gear set 200 further includes: an eighth gear 203, which is connected to both the third gear 201 and the fourth gear 205. In this embodiment, by providing a fifth gear 103 between the third gear 201 and the fourth gear 205, the transmission between the two is realized. In addition, by providing the eighth gear 203, it can be ensured that the distance between the third gear 201 and the fourth gear 205 is greater than the length of the notch 303. When the diameter of the eighth gear 203 is greater than the length of the notch 303, the above requirements can be met.

[0046] In one embodiment of the present invention, the second gear set 200 further includes: a ninth gear 202 and a tenth gear 204. The ninth gear 202 is connected to both the eighth gear 203 and the third gear 201; the tenth gear 204 is connected to both the eighth gear 203 and the fourth gear 205. In this embodiment, the second gear set 200 is composed of five gears, namely, the third gear 201, the ninth gear 202, the eighth gear 203, the tenth gear 204, and the fourth gear 205 are sequentially meshed and connected to form a five-gear mechanism located outside the annular gear ring 300. When the five-gear mechanism does not pass through the notch 303 of the annular gear ring 300, the third gear 201 and the fourth gear 205 are always meshed with the second tooth portion 302. When passing through the notch 303 of the annular gear ring 300, it is ensured that at least one of the third gear 201 and the fourth gear 205 is meshed with the second tooth portion 302. The functions of the ninth gear 202, the eighth gear 203, and the tenth gear 204 are to ensure the linkage between the third gear 201 and the fourth gear 205, and to increase the distance between the two, so as to ensure that they can cross the notch 303 and mesh with the second tooth portion 302.

[0047] In one embodiment of the present invention, the first gear set 100 further includes: a first chain, which is connected to the first gear 101 and the second gear 105 at the same time; the second gear set 200 further includes: a second chain, which is connected to the third gear 201 and the fourth gear 205 at the same time. In this embodiment, the chain drive method can be used to replace the above multi-gear drive method, and it is ensured that the distance between the two gears is greater than the length of the notch 303, so that the gears are always engaged with the annular gear ring 300. Preferably, since each gear rotates along the circumferential path of the annular gear ring 300, the first chain is respectively engaged with the first gear 101, the fifth gear 103 and the second gear 105, and the first gear 101, the fifth gear 103 and the second gear 105 are distributed in a triangle, so as to meet the transmission of the gears on the circumferential path. Similarly, the second chain is respectively engaged with the third gear 201, the eighth gear 203 and the ninth gear 202, and the third gear 201, the eighth gear 203 and the ninth gear 202 are distributed in a triangle. Thus, by the cooperation of the chain and the multi-tooth structure, on the one hand, the transmission between the gears can be realized, and on the other hand, it is ensured that the distance between the gears is greater than the length of the notch 303, so that the gears are always engaged with the annular gear ring 300, ensuring continuous rotation.

[0048] In one embodiment of the present invention, the multi-tooth transmission device further includes: a driving unit and a gear pump. The driving unit is arranged outside the annular gear ring 300 and is connected to the first gear set 100; the gear pump is arranged inside the annular gear ring 300 and is connected to the second gear set 200. In this embodiment, by arranging the driving unit outside the annular gear ring 300 to provide power, preferably a motor / motor; by arranging the gear pump inside the annular gear ring 300, the power source is introduced into the clamp, and it can be used for internal system functions, such as drill functions, etc.

[0049] In one embodiment of the present invention, the multi-tooth transmission device further includes: an accumulator, which is connected to the gear pump. The power generated by the rotation of the gear pump can be stored in the accumulator to continuously provide power for the clamping and loosening of the main clamp mechanism. It can be understood that the gear pump can be replaced by a generator, and the accumulator can be replaced by a battery to store electrical energy. In this embodiment, through the energy storage of the accumulator, energy output is provided for the continuous operation of the clamp.

[0050] In one embodiment of the present invention, the multi-stage gear transmission device further includes: a first seat body 400, a second seat body 500, and a third seat body 600. The first gear set 100 is installed in the first seat body 400, the second gear set 200 is installed in the second seat body 500, and the annular gear ring 300 is installed in the third seat body 600. Preferably, the third seat body 600 is composed of an inner peripheral plate 601, a top plate 602, and a bottom plate 603. The second tooth portion 302 of the annular gear ring 300 is exposed outside the third seat body 600 and meshes with the second gear set 200. The inner peripheral plate 601 is formed with a strip-shaped hole 6011, and the size of the strip-shaped hole 6011 is larger than the size of the first gear set 100. The first seat body 400 is fixed inside the strip-shaped hole 6011, so that the first gear set 100 on the first seat body 400 can mesh with the first tooth portion 301 through the strip-shaped hole 6011. Through the above-mentioned first seat body 400, second seat body 500, and third seat body 600, physical protection is provided for the first gear set 100, second gear set 200, and annular gear ring 300, and it is also convenient for the positioning and installation of each structure.

[0051] The present invention also provides a pair of pliers. The pair of pliers includes: the multi-stage gear transmission device in the embodiment of the present invention.

[0052] A pair of pliers provided by the present invention, because it includes the multi-stage gear transmission device in the above embodiment of the present invention, thus has the same advantages as above.

[0053] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative labor.

[0054] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-gear transmission device, characterized in that: include: An annular gear ring (300) having a notch (303), the notch (303) extending on a circumferential path of the annular gear ring (300), the inner side of the annular gear ring (300) having a first tooth portion (301), and the outer side of the annular gear ring (300) having a second tooth portion (302); A first gear set (100) comprising at least a first gear (101) and a second gear (105) connected to each other, the first gear set (100) being connected to the first toothed portion (301), and when the first gear (101) and the second gear (105) pass through the notch (303), at least one of the first gear (101) and the second gear (105) is connected to the first toothed portion (301); The second gear set (200) comprises at least a third gear (201) and a fourth gear (205) connected to each other, the second gear set (200) being connected to the second tooth portion (302), and when the third gear (201) and the fourth gear (205) pass through the notch (303), at least one of the third gear (201) and the fourth gear (205) is connected to the second tooth portion (302).

2. The multi-gear transmission device according to claim 1, characterized in that: The distance between the first gear (101) and the second gear (105) on the circumferential path of the annular gear ring (300) is greater than the length of the notch (303) on the circumferential path of the annular gear ring (300); The distance between the third gear (201) and the fourth gear (205) on the circumferential path of the annular gear ring (300) is greater than the length of the notch (303) on the circumferential path of the annular gear ring (300).

3. The multi-gear transmission device according to claim 1, characterized in that: The first gear set (100) further comprises: The fifth gear (103) is connected to both the first gear (101) and the second gear (105).

4. The multi-gear transmission device according to claim 3, characterized in that: The first gear set (100) further comprises: a sixth gear (102) connected to the fifth gear (103) and the first gear (101); The seventh gear (104) is connected to the fifth gear (103) and the second gear (105) at the same time.

5. The multi-gear transmission device according to claim 1, characterized in that: The second gear set (200) further comprises: The eighth gear (203) is connected to both the third gear (201) and the fourth gear (205).

6. The multi-gear transmission device according to claim 5, characterized in that: The second gear set (200) further comprises: A ninth gear (202) connected to the eighth gear (203) and the third gear (201); The tenth gear (204) is connected to both the eighth gear (203) and the fourth gear (205).

7. The multi-tooth transmission device according to claim 1, characterized in that: The first gear set (100) further comprises: A first chain connected to both the first gear (101) and the second gear (105); The second gear set (200) further comprises: The second chain is connected to the third gear (201) and the fourth gear (205) at the same time.

8. The multi-tooth transmission device according to any one of claims 1 to 7, characterized in that: Also includes: A driving unit, arranged on the outside of the annular gear ring (300) and connected to the first gear set (100); A gear pump is arranged inside the annular gear ring (300) and is connected to the second gear set (200).

9. The multi-tooth transmission device according to claim 8, characterized in that: Also includes: An accumulator is connected with the gear pump.

10. A clamp, characterized in that: include: A multi-tooth transmission as claimed in any one of claims 1 to 9.

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