Drive assembly

Abstract

The invention relates to a driving assembly which comprises a fixed gear, a fixed rack, a movable middle rack, a movable gear and a transmission rack, and the movable middle rack is matched with the fixed gear so that the movable middle rack can be driven to reciprocate when the fixed gear rotates clockwise and anticlockwise; the movable gear is rotatably fixed to the movable middle rack, the movable gear is matched with the fixed rack, and when the movable middle rack reciprocates, the movable gear can horizontally move in the extending direction of the fixed rack in a reciprocating mode and can rotate around the movable rotating shaft; and the transmission rack can drive a to-be-driven part, and the transmission rack is matched with the movable gear, so that when the movable gear rotates clockwise and anticlockwise, the transmission rack can be driven to reciprocate to drive the to-be-driven part to move. According to the driving assembly, through the combination of the gear and the rack, the transmission rack has a smaller size and a higher moving speed under the same moving distance.

Description

Technical Field

[0001] The present application relates to a drive assembly, in particular to a drive assembly for driving a fuel tank, a charging port, a door handle or a cover of a loading recess area of ​​a vehicle. Background Art

[0002] The cover assembly of the object includes a housing, a cover and a driving assembly, and the driving assembly is connected to the cover to drive the cover to open and close. The driving device has a gear rack structure, wherein the gear is coaxially connected to the actuator, and the output shaft of the actuator rotates to drive the gear to rotate, thereby driving the rack meshing with the gear to move linearly, and the rack is connected to the cover, so that the linear movement of the rack can drive the cover to open and close. Summary of the invention

[0003] In the prior art, in order to move the lid of the lid assembly from the closed position to the open position, the rack of the driving assembly needs to move a certain distance, so the length of the tooth portion of the rack must not be less than the displacement length of the rack (that is, the longest distance of the rack translation is the length of the tooth portion). When the lid moves from the closed position to the open position, the rack will extend out of the lid assembly due to its own translation, thereby creating a risk of interference with other environmental parts of the vehicle body.

[0004] On the other hand, the input voltage of the actuator driving the gear in the prior art is fixed, so the rotation speed of the actuator is limited by the input voltage, resulting in a slower rotation speed of the gear, and then a slower moving speed of the rack, which ultimately leads to a slower opening or closing speed of the cover of the cover assembly. If the cover is opened or closed faster by increasing the diameter of the gear, more space inside the cover assembly will be disadvantageously occupied.

[0005] A drive assembly is needed, which has a relatively short rack so that the rack can meet the movement of the cover from the closed position to the open position and the length of the rack extending out of the cover assembly during the movement is as small as possible.

[0006] A drive assembly is needed to solve the problem of slow opening or closing speed of the cover without increasing the overall size of the cover assembly.

[0007] The purpose of the present application is to at least partially solve the above technical problems. According to the first aspect of the present application, a driving assembly is provided, which is characterized by comprising a fixed gear, a fixed rack, a movable intermediate rack, a movable gear and a transmission rack, wherein the fixed gear has a fixed rotation axis, and the fixed gear can rotate around the fixed rotation axis; the position of the fixed rack relative to the fixed rotation axis remains fixed; the movable intermediate rack is configured to cooperate with the fixed gear so that when the fixed gear rotates clockwise and counterclockwise, the movable intermediate rack can be driven to reciprocate; the movable gear has a movable rotation axis , wherein the moving rotating shaft is rotatably fixed on the moving intermediate rack, and wherein the moving gear cooperates with the fixed rack, and the moving gear is configured so that when the moving intermediate rack moves back and forth, the moving gear can reciprocate and translate along the extension direction of the fixed rack, and the moving gear can rotate around the moving rotating shaft; the transmission rack is configured to be able to drive the driven member, wherein the transmission rack is configured to cooperate with the moving gear so that when the moving gear rotates clockwise and counterclockwise, the transmission rack can be driven to reciprocate to drive the driven member to move.

[0008] According to a first aspect of the present application, it is characterized in that the driven member has a housing, and the fixed rotating shaft and the fixed rack are arranged on the housing of the driven member.

[0009] According to a first aspect of the present application, it is characterized in that the shell has a driving guide portion, which extends along a first direction, wherein the transmission rack can reciprocate along the driving guide portion in the first direction.

[0010] According to the first aspect of the present application, it is characterized in that the moving rotating shaft is rotatably fixed to one end of the moving intermediate rack; the transmission rack has an initial position of transmission rack movement and a terminal position of transmission rack movement; at the initial position of transmission rack movement, the moving gear cooperates with an end of the transmission rack away from the driven member, and the fixed gear cooperates with an end of the moving intermediate rack away from the driven member; and at the terminal position of transmission rack movement, the moving gear cooperates with an end of the transmission rack close to the driven member, and the fixed gear cooperates with an end of the moving intermediate rack close to the driven member.

[0011] According to the first aspect of the present application, it is characterized in that it also includes a guide rod, a first end of which is connected to the transmission rack, and a second end of which can pass through the driving guide portion and be connected to the driven member, so that the guide rod can drive the driven member to move reciprocatingly along the driving guide portion.

[0012] According to a first aspect of the present application, the method further comprises an actuator configured to drive the fixed gear to rotate.

[0013] According to a first aspect of the present application, it is characterized in that the driven member is a cover of a cover assembly of a charging port or a fuel filler port of a vehicle, and the transmission rack is configured to be able to move the cover back and forth.

[0014] According to a first aspect of the present application, it is characterized in that the cover assembly comprises:

[0015] The shell, the cover and the drive connection assembly, the shell has a accommodating space and a door panel opening; the cover can move relative to the shell and has a closed position and an open position, when the cover is in the closed position, the cover closes the door panel opening, and the transmission rack is located at the initial position of the transmission rack movement; and when the cover is in the open position, the cover is accommodated in the accommodating space and exposes the door panel opening, and the transmission rack is located at the end position of the transmission rack movement; the first end of the drive connection assembly can be connected to the transmission rack through the guide rod, so that it can make reciprocating linear movement along the first direction, and the second end of the drive connection assembly can be rotatably connected to the first end of the cover; wherein, the shell also defines a first guide portion and a second guide portion, the first end of the cover can move along the first guide portion, and the second end of the cover can move along the second guide portion.

[0016] According to the first aspect of the present application, it is characterized in that the cover assembly is configured such that: during the movement of the cover from the closed position to the open position, the first end of the cover first exits the door panel opening, and then the second end of the cover exits the door panel opening.

[0017] According to the first aspect of the present application, it is characterized in that the first guide portion includes a first guide portion first part and a first guide portion second part that are connected, and the first guide portion second part is the driving guide portion; wherein the first guide portion first part is arranged along a second direction different from the first direction.

[0018] According to the second aspect of the present application, a driving assembly is provided, characterized in that it includes a fixed gear, a fixed rack, a movable intermediate rack, a movable gear and a transmission rack, wherein the fixed gear has a fixed rotating shaft, and the fixed gear can rotate around the fixed rotating shaft; the position of the fixed rack relative to the fixed rotating shaft remains fixed; the movable intermediate rack is configured to cooperate with the fixed gear so that when the fixed gear rotates clockwise and counterclockwise, the movable intermediate rack can move back and forth; the movable gear has a movable rotating shaft, wherein the movable rotating shaft can be rotatably fixed at one end of the movable intermediate rack, and wherein the movable gear cooperates with the fixed rack so that when When the movable intermediate rack moves back and forth, the movable gear can move back and forth along the extension direction of the fixed rack, and the movable gear is configured to rotate around the movable rotation axis when moving back and forth; the transmission rack is configured to drive the driven member to move back and forth, wherein the transmission rack cooperates with the movable gear so that when the movable gear rotates clockwise and counterclockwise, the transmission rack can move back and forth; wherein the fixed rotation axis and the fixed rack are arranged on the housing of the driven member, and the housing has a driving guide portion, which extends along a first direction, wherein the transmission rack can move back and forth along the driving guide portion in the first direction.

[0019] According to the second aspect of the present application, it is characterized in that it also includes: a guide rod, a first end of which is connected to the transmission rack, and a second end of which can pass through the driving guide part and be connected to the driven member, so that the guide rod can move back and forth along the driving guide part.

[0020] According to the second aspect of the present application, it is characterized in that the transmission rack has an initial position of transmission rack movement and a terminal position of transmission rack movement, at the initial position of transmission rack movement, the movable gear cooperates with an end of the transmission rack away from the driven member, and the fixed gear cooperates with an end of the moving intermediate rack away from the driven member, and at the terminal position of transmission rack movement, the movable gear cooperates with an end of the transmission rack close to the driven member, and the fixed gear cooperates with an end of the moving intermediate rack close to the driven member.

[0021] According to a second aspect of the present application, it is characterized by further comprising an actuator, wherein the actuator is configured to drive the fixed gear to rotate.

[0022] According to a second aspect of the present application, it is characterized in that the driven member is a cover of a cover assembly of a charging port or a fuel filler port of a vehicle, and the transmission rack is configured to be able to move the cover back and forth.

[0023] According to a third aspect of the present application, a vehicle is provided, characterized by comprising a drive assembly for driving a cover assembly according to the first aspect and the second aspect of the present application.

[0024] The drive assembly of the present application adds a fixed rack, an intermediate rack and a moving gear on the basis of the prior art, so that the rack connected to the cover has a smaller size and a faster moving speed at the same moving distance, thereby reducing the risk of interference between the cover assembly and other environmental parts of the vehicle body and increasing the opening or closing speed of the cover.

[0025] The concept, specific structure and technical effects of the present application will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present application will become more easily understood when the following detailed description is read in conjunction with the accompanying drawings, in which:

[0027] Figure 1A is a perspective view of a driving assembly 160 for driving the cover assembly 100 in a cover closed state;

[0028] Figure 1B is a perspective view of a driving assembly 160 for driving the cover assembly 100 in a cover-open state;

[0029] Figure 1C for Figure 1A The cover assembly 100 is shown as a perspective view after the housing upper cover 104 is hidden;

[0030] Figure 1D for Figure 1B The housing 100 shown is a three-dimensional view with the housing cover 104 hidden;

[0031] Figure 2A for Figure 1A A side view of the lid assembly 100 is shown with the lid 112 in a closed position;

[0032] Figure 2B for Figure 1B A side view of the lid assembly 100 is shown with the lid 112 in an open position;

[0033] Figure 2C This is a schematic diagram of force analysis of the driving assembly 160 of the present application;

[0034] Figure 3A is a perspective view of another embodiment of the drive assembly 360 in a lid closed state;

[0035] Figure 3B A perspective view of another embodiment of the drive assembly 360 in a cover open state;

[0036] Figure 4 It is a schematic diagram of a vehicle 400 having a cover assembly 100 and a drive assembly 160 of the present application. DETAILED DESCRIPTION

[0037] Various specific embodiments of the present application will be described below with reference to the accompanying drawings that form a part of this specification. It should be understood that although terms indicating directions, such as "upper", "lower", "left", "right", etc., are used in this application to describe various example structural parts and elements of the present application, these terms are used here only for the purpose of convenience of description, and these terms are determined based on the example orientations shown in the accompanying drawings. Since the embodiments disclosed in this application can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations.

[0038] The cover assembly of the present application can be applied to a variety of scenarios, such as: the refueling port of a fuel-consuming vehicle, the charging port of an electric-consuming vehicle, the door handle of a vehicle, the liquid filling port of a vehicle, and any other scenario where there is a cover covering the recessed area of ​​the vehicle and the cover has an open state and a closed state. For the sake of simplicity, the following description will take the refueling port / charging port of a vehicle as an application scenario for introduction.

[0039] Figures 1A-1D The three-dimensional views of the driving assembly 160 for driving the cover assembly 100 of the present application showing or hiding the upper cover 104 in the cover closed state and the cover open state are respectively shown.

[0040] like Figures 1A-1D As shown, the cover assembly 100 includes a housing 102, a housing upper cover 104, and a cover 112. The housing 102 has a receiving space 108 and a door panel opening 110. The cover 112 can move relative to the housing 102 and has a closed position and an open position. When the cover 112 is in the closed position, the cover 112 closes the door panel opening 110; when the cover 112 is in the open position, the cover 112 is received in the receiving space 108 and the door panel opening 110 is exposed. Figure 1D shown.

[0041] Figure 1C-1D Relative to Figure 1A-1B The housing cover 104 is hidden so as to show more components inside the housing 102. Figure 1C-1DAs shown, the cover 112 further includes a cover first end 122 and a cover second end 124, and the housing 102 defines a first guide portion 132 and a second guide portion 134, the cover first end 122 can move along the first guide portion 132, and the cover second end 124 can move along the second guide portion 134. In the process of the cover 112 moving from the closed position to the open position, the cover first end 122 of the cover 112 first exits the door panel opening 110, and then the cover second end 124 of the cover 112 exits the door panel opening 110. The first guide portion 132 defined by the housing 102 includes a first guide portion first portion 142 and a first guide portion second portion 144 that are interconnected, wherein the first guide portion second portion 144 extends along the first direction, the first guide portion first portion 142 extends along the second direction, and the second guide portion 134 extends along the third direction.

[0042] Continue to refer to Figure 1C-1D The cover assembly 100 further includes a drive connection assembly 114, which has a drive connection assembly first end 116 and a drive connection assembly second end 118 that are hinged to each other. The drive assembly 160 includes two guide rods 151, 152, and the drive connection assembly first end 116 can be connected to the transmission rack 212 of the drive assembly 160 (see Figure 2A-2B ) is connected. Specifically, the first ends of the guide rods 151, 152 are connected to the transmission rack 212, and the second ends of the guide rods 151, 152 can pass through the second portion 144 of the first guide portion and be connected to the first end 116 of the drive connection assembly, so that the guide rods 151, 152 can drive the first end 116 of the drive connection assembly to move back and forth along the second portion 144 of the first guide portion. Since the two guide rods 151, 152 are limited to move in the second portion 144 of the first guide portion, the first end 116 of the drive connection assembly can move back and forth in a first direction. It should be noted that, although the number of guide rods provided in the present application is two, those skilled in the art will understand that in other embodiments, one or more than two guide rods may be provided to be connected to the drive connection assembly 114.

[0043] The second end 118 of the driving connection assembly is rotatably hingedly connected to the first end 122 of the cover 112, so that the guide rods 151, 152 can drive the cover 112 to move during the movement of the guide rods 151, 152 along the second portion 144 of the first guide portion, so that the cover 112 can move between the closed position and the open position. Since the transmission rack 212 is connected to the first end 116 of the driving connection assembly through the guide rods 151, 152 passing through the second portion 144 of the first guide portion, the transmission rack 212 is also limited to reciprocating linear movement along the second portion 144 of the first guide portion (i.e., the first direction).

[0044] It can be seen that the reciprocating linear movement of the transmission rack 212 along the first direction can be transformed into the cover 112 moving in a reciprocating linear direction through the guide rods 151, 152, the first end 116 of the drive connection assembly, the second end 118 of the drive connection assembly, and the first end 122 of the cover. Figure 1A and 1C The closed position shown and Figure 1B and 1D to move between the open positions shown.

[0045] Figure 2A-2B for Figure 1A-1B The lid assembly 100 is shown in side views with the lid 112 in a closed position and an open position to illustrate further details of the drive assembly 160 .

[0046] like Figure 2A-2B As shown, the driving assembly 160 includes a fixed gear 202, a fixed rack 204, a movable intermediate rack 206, a movable gear 208, a transmission rack 212 and an actuator (not shown). The fixed gear 202 has a fixed rotation axis 211 disposed on the housing 102, so that the fixed gear 202 can rotate around the fixed rotation axis 211. The actuator is disposed in the accommodating space 108 of the housing 102, and is configured to drive the fixed gear 202 to rotate. Preferably, the actuator is configured to be coaxially arranged with the fixed rotation axis 211 of the fixed gear 202, but those skilled in the art can understand that the actuator can also cooperate with the fixed gear 202 through an intermediate transmission component to drive the fixed gear 202 to rotate.

[0047] The fixed rack 204 is fixedly disposed on the housing 102, so its position relative to the fixed rotating shaft 211 of the fixed gear 202 remains fixed. Figure 2A-2B In the illustrated embodiment, the fixed rotating shaft 211 of the fixed gear 202 is disposed at the left end of the fixed rack 204, but those skilled in the art will appreciate that the fixed rotating shaft 211 of the fixed gear 202 may also be disposed at other positions of the fixed rack 204, such as the middle, as long as the length of the fixed rack 204 is sufficient to meet the requirements of the movement stroke of the cover 112.

[0048] The movable intermediate rack 206 is meshed with the fixed gear 202, so that when the fixed gear 202 rotates clockwise and counterclockwise, the movable intermediate rack 206 can be driven to reciprocate. The movable gear 208 has a movable rotation axis 210 fixed to the right end of the movable intermediate rack 206. The movable gear 208 is meshed with the fixed gear 204, so that when the movable intermediate rack 206 reciprocates, the movable gear 208 can reciprocate along the extension direction of the fixed gear 204 with the reciprocating movement of the movable intermediate rack 206, and when the movable gear 208 reciprocates, due to the meshing with the fixed gear 204, the movable gear 208 can rotate around the movable rotation axis 210.

[0049] The transmission rack 212 is meshed with the movable gear 208, so that the clockwise and counterclockwise rotation of the movable gear 208 around the movable rotating shaft 210 can drive the transmission rack 212 to move back and forth, thereby driving the cover 112 to move. The transmission rack 212 has an initial position ( Figure 2A The position shown) and the transmission rack movement end position ( Figure 2B At the initial position of the transmission rack, the movable gear 208 meshes with the end (right end) of the transmission rack 212 away from the cover 112, and the fixed gear 202 meshes with the end (right end) of the movable intermediate rack 206 away from the cover 112; at the end position of the transmission rack, the movable gear 208 meshes with the end (left end) of the transmission rack 212 close to the cover 112, and the fixed gear 202 meshes with the end (left end) of the movable intermediate rack 206 close to the cover 112.

[0050] Those skilled in the art will appreciate that the meshing of the fixed gear 202 with the moving intermediate rack 206, the meshing of the moving gear 208 with the fixed rack 204, and the meshing of the moving gear 208 with the transmission rack 212 are all achieved by meshing the gear teeth located on the outer circumference of the fixed gear 202 and the moving gear 208 with the teeth of the moving intermediate rack 206, the fixed rack 204, and the transmission rack 212, thereby converting the rotation of each gear into the translation (or movement) of the rack. Therefore, the linear velocity of the outer circumference rotation of each gear is equal to the translation velocity of the rack meshing therewith.

[0051] Compared with the coordination of a single set of gears and racks in the prior art, the present application configures a fixed gear 202, a fixed rack 204, a movable intermediate rack 206, a movable gear 208, and a transmission rack 212 as above. The transmission rack 212 connected to the cover 112 has a smaller length and a faster moving speed than the transmission rack in the prior art, thereby reducing the risk of interference between the transmission rack 212 and other environmental parts of the vehicle body and increasing the opening or closing speed of the cover 112.

[0052] Specifically, in terms of size, in the prior art, assuming that the distance the transmission rack moves from the initial position to the final position is L, for example, in the embodiment of the present application, the length of the moving distance L is 158 mm, then the tooth length of the transmission rack in the prior art is at least L.

[0053] In this application, if Figure 2A-2BAs shown, due to the addition of the mobile intermediate rack 206, it can play a role in compensating the displacement of the transmission rack 212, that is, the displacement of the transmission rack 212 relative to the fixed gear 202 (main drive gear) is the superposition of the displacement of the transmission rack 212 relative to the movable gear 208 and the displacement of the movable gear 208 relative to the fixed gear 202 (main drive gear). Assuming that the lengths of the teeth of the mobile intermediate rack 206 and the transmission rack 212 are L1 and L2 respectively, and the distance moved by the transmission rack 212 from the initial position to the final position is L, then L=L1+L2. In a preferred embodiment, the lengths of the mobile intermediate rack 206 and the transmission rack 212 are equal, that is:

[0054] L1=L2=L / 2.

[0055] It can be seen that in order to make the cover 112 achieve the same movement range (i.e., the cover 112 moves from the closed position to the open position), the tooth length of the transmission rack 212 connected to the cover 112 in the present application is half of the tooth length of the transmission rack in the prior art, thereby greatly reducing the risk of interference between the transmission rack and other environmental parts of the vehicle body.

[0056] In terms of the rack moving speed, in the prior art, assuming that the outer circumferential rotation speed of the main drive gear is V1, the translation speed of the transmission rack meshing with it is equal to the outer circumferential rotation speed of the main drive gear, so it is also V1. Therefore, the moving speed of the end of the cover connected to the transmission rack is also V1.

[0057] In this application, if Figure 2A-2BAs shown, in a preferred embodiment, assuming that the number of teeth, pitch and size of each gear and rack are equal, if the speed of the outer circumference rotation of the fixed gear 202 (main driving gear) is V2, the speed of the translation of the moving intermediate rack 206 relative to the fixed gear 202 is V2, and the translation speed of the moving gear 208 fixed to the right end of the moving intermediate rack 206 relative to the fixed gear 202 is also V2. Since the number of teeth and pitch of the moving intermediate rack 206 and the fixed rack 204 are equal, the gear parameters of the fixed gear 202 and the moving gear 208 are the same, during the meshing transmission process of the moving gear 208 and the fixed rack 204, the speed of the translation of the fixed rack 204 relative to the moving gear 208 (actually, the translation of the moving gear 208 relative to the fixed rack 204) is equal to the speed V2 of the translation of the moving intermediate rack 206 relative to the fixed gear 202. At the same translation speed, the rotation speed of the outer circumference of the moving gear 208 should also be equal to the rotation speed V2 of the outer circumference of the fixed gear 202. Since the transmission rack 212 is meshed with the moving gear 208, the translation speed of the transmission rack 212 relative to the moving gear 208 is equal to the rotation speed of the outer circumference of the moving gear 208, that is, the translation speed of the transmission rack 212 relative to the moving gear 208 is also equal to V2. It can be calculated that the translation speed V0 of the transmission rack 212 relative to the fixed gear 202 is the sum of the translation speed of the moving gear 208 relative to the fixed gear 202 and the translation speed of the transmission rack 212 relative to the moving gear 208, that is:

[0058] V0=V2+V2=2V2.

[0059] Therefore, the moving speed of the end of the cover 112 connected to the transmission rack 212 is twice the outer circumferential rotation speed of the fixed gear 202 (main driving gear).

[0060] In the above embodiment of the present application, when the input voltage is 13.5V, the relationship between the speed n of the actuator output shaft and the actuator load T is fitted through test data as follows:

[0061] n = -3.4 x T + 32.4,

[0062] Where n is the speed of the actuator output shaft in rpm; T is the load of the actuator in N·m, the coefficient of T -3.4 is in rpm / N·m, and the constant 32.4 is in rpm.

[0063] In the embodiment of the present application, the input voltage is constant at 13.5 V; the mass of the cover 112 is 0.33 kg, that is, the weight of the cover 112 is 3.3 N; the pitch circle radius r of the fixed gear 202 (main drive gear) is 13.3 mm, that is, 1.33 x 10 -2If the mass and friction of each gear and rack in the driving assembly 160 are negligible, and the tilt angle of the cover 112 is ignored, the resistance applied by the cover 112 to the transmission rack 212 can be approximately equal to the weight of the cover 112, that is, 3.3N.

[0064] If only a single set of gear racks is used (i.e. the technical solution of the prior art), the load T1 of the actuator motor is the torque applied by the transmission rack to the main drive gear, and the calculation formula is as follows:

[0065] T1=3.3Nx1.33x10 -2 m=0.044N·m,

[0066] The calculation formula of the actuator speed n1 corresponding to the above torque T1 is as follows:

[0067] n1=-3.4x T1+32.4

[0068] =32.25(rpm),

[0069] If the actuator is coaxially connected to the main drive gear, the speed of the main drive gear is equal to n1, that is, 32.25rpm.

[0070] The outer circumferential radius of the main driving gear is approximately equal to the tooth circle radius r, and the calculation formula of the outer circumferential rotation speed V1 of the main driving gear is as follows:

[0071] V1=n1 x 2πr=2.69(m / mi n)=4.49(cm / s),

[0072] Then the moving speed of the end of the cover connected to the transmission rack is also V1, that is, 4.49 cm / s.

[0073] Figure 2C It is a schematic diagram of force analysis of the driving assembly 160 of the present application.

[0074] like Figure 2C As shown, in this application, it is assumed that the moving intermediate rack 206 exerts a rightward force F2 on the moving gear 208 at the rotation center of the moving gear 208, and the transmission rack 212 exerts a leftward force F1 on the moving gear 208 at the upper side of the outer periphery of the moving gear 208, and the force F1 is approximately equal to the gravity of the cover 112, 3.3N. Since the motion trajectory of the moving gear 208 is a superposition of translation and rotation, the lower side of the outer periphery of the moving gear 208 is the fulcrum C of the rotation. According to the lever principle, F1 x2r = F2 xr (where r is the outer circumferential radius of the moving gear 208), so F2 = 2F1 = 6.6N.

[0075] As for the moving middle rack 206, since it only moves in translation, the reaction force F2 exerted on the moving middle rack 206 by the moving gear 208 is also F2. According to the force balance, the force F3 exerted on the moving middle rack 206 by the fixed gear 202 should be equal to F2, that is, 6.6N.

[0076] At this time, the load T2 of the actuator motor is the torque applied by the transmission rack to the fixed gear 202 (main drive gear), and the calculation formula is as follows:

[0077] T2=6.6Nx1.33x10 -2 m=0.088N·m,

[0078] The calculation formula of the actuator speed n2 corresponding to the above torque T2 is as follows:

[0079] n2=-3.4x T1+32.4

[0080] =32.10(rpm),

[0081] If the actuator is coaxially connected to the fixed gear 202 (main driving gear), the rotation speed of the fixed gear 202 (main driving gear) is equal to n2, that is, 32.10 rpm.

[0082] The outer circumferential radius of the fixed gear 202 (main driving gear) is approximately equal to the tooth portion radius r, and the calculation formula for the outer circumferential rotation speed V2 of the fixed gear 202 (main driving gear) is as follows:

[0083] V2=n2 x 2πr=5.36 (m / mi n)=8.94 (cm / s).

[0084] When the input voltage is 13.5V, the speed of the actuator motor under loads T1 and T2 is 32.25rpm and 32.10rpm respectively. It can be seen that within a smaller load range, such as within 0.1N·m, the change in load size has little effect on the speed of the actuator motor. Therefore, the rack and pinion structure of the drive assembly 160 of the present application can increase the opening or closing speed of the cover 112 to approximately twice that of the prior art.

[0085] Combine the following Figure 1C-1D as well as Figure 2A-2B To describe the process of the cover 112 moving from the closed position to the open position:

[0086] like Figure 1C and 2AAs shown, the cover 112 is in the closed position, at which time the transmission rack 212 is in the initial position of the transmission rack movement, the movable gear 208 is meshed with the right end of the transmission rack 212, and the fixed gear 202 is meshed with the right end of the movable intermediate rack 206. When the driver needs to open the cover 112, the driver can drive the drive assembly 160, so that the actuator drives the fixed gear 202 to rotate clockwise; the clockwise rotation of the fixed gear 202 will drive the movable intermediate rack 206 meshed with it to move rightward, and the rightward movement of the movable intermediate rack 206 drives the movable gear 208 to translate rightward. Since the movable gear 208 is meshed with the fixed rack 204 during the translation process, the rightward translation of the movable gear 208 will drive it to rotate clockwise; Clockwise rotation can drive the transmission rack 212 meshing therewith to move rightward, and the rightward movement of the transmission rack 212 can drive the guide rods 151, 152 connected thereto to move rightward. Since the guide rods 151, 152 pass through the second part 144 of the first guide portion and are connected to the first end 116 of the drive connection assembly, the guide rods 151, 152 are limited to move in the first direction in which the second part 144 of the first guide portion extends, so the first end 116 of the drive connection assembly also moves rightward in the first direction. The rightward movement of the first end 116 of the drive connection assembly in the first direction can drive the second end 118 of the drive connection assembly hinged thereto to move. The end of the second end 118 of the drive connection assembly hinged to the first end 122 of the cover is limited to move in the second direction in which the first part 142 of the first guide portion extends and the first direction in which the second part 144 of the first guide portion extends. The movement of the first end 122 of the cover can drive the second end 124 of the cover to rotate in the second guide portion 134 first, and then move along the third direction in which the second guide portion 134 extends. When the first end 122 of the cover moves to the second portion 144 of the first guide portion, the cover 112 gradually rises to expose the door panel opening 110. Finally, the cover 112 moves to Figure 1D and 2B In the open position shown, the transmission rack 212 is located at the end position of the transmission rack movement, the movable gear 208 is meshed with the left end of the transmission rack 212, and the fixed gear 202 is meshed with the left end of the movable intermediate rack 206.

[0087] When the driver needs to close the cover 112, the driver can drive the driving assembly 160, so that the actuator drives the fixed gear 202 to rotate counterclockwise. The rotation direction of the above gears, the moving path of each rack and the cover are opposite to the opening process of the cover 112, which will not be repeated here.

[0088] Figure 3A-3B FIG. 3 is a perspective view of another embodiment of the drive assembly 360 when the cover is closed or opened.

[0089] Figure 3A-3B The drive assembly 360 of the illustrated embodiment is Figure 2A-2BThe structures of the drive assembly 160 of the illustrated embodiment are similar, so the parts with the same structure are not described here in detail. The structural difference is that: Figure 3A-3B The fixed rotation axis 311 of the middle fixed gear 302 is arranged at the right end of the fixed rack 204, and the moving rotation axis 310 of the movable gear 208 is arranged at the left end of the moving middle rack 206. Figure 2A and 2B Similarly, the transmission rack 212 has a transmission rack movement initial position ( Figure 3A The position shown) and the transmission rack movement end position ( Figure 3B At the initial position of the transmission rack, the movable gear 208 meshes with the right end of the transmission rack 212, and the fixed gear 302 meshes with the right end of the movable intermediate rack 206; at the end position of the transmission rack, the movable gear 208 meshes with the left end of the transmission rack 212, and the fixed gear 302 meshes with the left end of the movable intermediate rack 206.

[0090] Figure 4 It is a schematic diagram of a vehicle 400 having a cover assembly 100 and a drive assembly 160 of the present application, which illustrates the application scenario of the cover assembly 100 and the drive assembly 160 of the present application.

[0091] like Figure 4 As shown, the vehicle 400 has a fuel filling opening 402 , the cap assembly 100 can be used to cover the fuel filling opening 402 , and the movement of the cap in the cap assembly 100 is driven by the driving assembly 160 . Figure 4 The cover assembly 100 and the drive assembly 160 are merely examples, and the cover assembly 100 of the present application can also be applied to any scenario that has a covered recessed area of ​​the vehicle, such as a charging port of an electric vehicle, a door handle of a vehicle, a liquid filling port of a vehicle, and the like, and the cover has an open state and a closed state.

[0092] The drive assembly of the present application has the following advantages over the drive assembly in the prior art:

[0093] First, the embodiment of the present application reduces the length of the transmission rack connected to the cover by adding a moving gear, a fixed rack and an intermediate rack on the basis of the prior art, so that when the cover moves from a closed position to an open position, the length of the transmission rack in the present application extending to the right is shorter than that in the prior art, thereby reducing the risk of interference between the cover assembly and other environmental parts of the vehicle body.

[0094] Second, the moving speed of the transmission rack in the present application is increased to twice that of the transmission rack in the prior art, which shortens the opening or closing time of the cover.

[0095] Third, the gear transmission structure of the driving assembly of the present application can achieve the same opening or closing time of the cover as that of the prior art at a lower input voltage.

[0096] Although the present disclosure has been described in conjunction with the examples of the embodiments summarized above, various alternatives, modifications, changes, improvements and / or substantially equivalent solutions, whether known or currently or foreseeable in the near future, may be apparent to those of ordinary skill in the art. In addition, the technical effects and / or technical problems described in this specification are exemplary rather than restrictive; so the disclosure in this specification may be used to solve other technical problems and have other technical effects and / or may solve other technical problems. Therefore, the examples of the embodiments of the present disclosure as stated above are intended to be illustrative rather than restrictive. Various changes may be made without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to include all known or earlier developed alternatives, modifications, changes, improvements and / or substantially equivalent solutions.

Claims

1. A drive assembly (160), characterized in that include: A fixed gear (202), the fixed gear (202) having a fixed rotation axis (211), and the fixed gear (202) can rotate around the fixed rotation axis (211); A fixed rack (204), wherein the position of the fixed rack (204) relative to the fixed rotating shaft (211) remains fixed; A movable intermediate rack (206), wherein the movable intermediate rack (206) is configured to cooperate with the fixed gear (202) so that when the fixed gear (202) rotates clockwise and counterclockwise, the movable intermediate rack (206) can be driven to reciprocate; a movable gear (208), the movable gear (208) having a movable rotation axis (210), wherein the movable rotation axis (210) is rotatably fixed on the movable intermediate rack (206), and wherein the movable gear (208) cooperates with the fixed rack (204), and the movable gear (208) is configured such that when the movable intermediate rack (206) reciprocates, the movable gear (208) can reciprocate and translate along the extension direction of the fixed rack (204), and the movable gear (208) can rotate around the movable rotation axis (210); and A transmission rack (212), wherein the transmission rack (212) is configured to be able to drive the driven member, wherein the transmission rack (212) is configured to cooperate with the movable gear (208) so that when the movable gear (208) rotates clockwise and counterclockwise, the transmission rack (212) can be driven to move back and forth to drive the driven member to move.

2. The drive assembly according to claim 1, characterized in that: The driven member has a housing (102), and the fixed rotating shaft (211) and the fixed rack (204) are arranged on the housing (102) of the driven member.

3. The drive assembly according to claim 2, characterized in that: The housing (102) has a driving guide portion (144) extending along a first direction, wherein the transmission rack (212) is capable of reciprocating along the driving guide portion (144) in the first direction.

4. The drive assembly according to claim 3, characterized in that: The movable rotating shaft (210) is rotatably fixed to one end of the movable intermediate rack (206); The transmission rack (212) has an initial position for transmission rack movement and a terminal position for transmission rack movement; At the initial movement position of the transmission rack, the movable gear (208) cooperates with the end of the transmission rack (212) away from the driven member, and the fixed gear (202) cooperates with the end of the movable intermediate rack (206) away from the driven member; and At the end position of the transmission rack movement, the movable gear (208) cooperates with an end of the transmission rack (212) close to the driven member, and the fixed gear (202) cooperates with an end of the movable intermediate rack (206) close to the driven member.

5. The drive assembly according to claim 1, characterized in that Also includes: A guide rod (151, 152), wherein the first end of the guide rod (151, 152) is connected to the transmission rack (212), and the second end of the guide rod (151, 152) can pass through the driving guide portion (144) and be connected to the driven member, so that the guide rod (151, 152) can drive the driven member to move back and forth along the driving guide portion (144).

6. The drive assembly according to claim 1, characterized in that Also includes: An actuator is configured to drive the fixed gear (202) to rotate.

7. The drive assembly according to claim 4, characterized in that: The driven member is a cover (112) of a cover assembly (100) of a charging port or a fuel filler port of a vehicle, and the transmission rack (212) is configured to be able to drive the cover (112) to move back and forth.

8. The drive assembly according to claim 7, characterized in that: The cover assembly (100) comprises: The housing (102) has a receiving space (108) and a door panel opening (110); The cover (112) is movable relative to the housing (102) and has a closed position and an open position. When the cover (112) is located at the closed position, the cover (112) closes the door panel opening (110), and the transmission rack (212) is located at an initial position of movement of the transmission rack; and when the cover (112) is located at the open position, the cover (112) is accommodated in the accommodation space (108) and exposes the door panel opening (110), and the transmission rack (212) is located at a termination position of movement of the transmission rack; and A driving connection assembly (114), wherein a first end (116) of the driving connection assembly (114) can be connected to the transmission rack (212) via the guide rods (151, 152), so as to be capable of reciprocating linear movement along the first direction, and a second end (118) of the driving connection assembly (114) is rotatably connected to a first end (122) of the cover (112); The shell (102) further defines a first guide portion (132) and a second guide portion (134), the first end (122) of the cover (112) is capable of moving along the first guide portion (132), and the second end (124) of the cover (112) is capable of moving along the second guide portion (134).

9. The drive assembly according to claim 8, characterized in that: The cover assembly (100) is configured such that, during the movement of the cover (112) from the closed position to the open position, the first end (122) of the cover (112) first exits the door panel opening (110), and then the second end (124) of the cover (112) exits the door panel opening (110).

10. The drive assembly according to claim 8, characterized in that: The first guide portion (132) comprises a first guide portion first part (142) and a first guide portion second part (144) which are connected to each other, and the first guide portion second part (144) is the driving guide portion (144); Wherein, the first portion (142) of the first guide part is arranged along a second direction different from the first direction.

11. A drive assembly (160), characterized in that include: A fixed gear (202), the fixed gear (202) having a fixed rotation axis (211), and the fixed gear (202) can rotate around the fixed rotation axis (211); A fixed rack (204), wherein the position of the fixed rack (204) relative to the fixed rotation axis (212) remains fixed; A movable intermediate rack (206), wherein the movable intermediate rack (206) is configured to cooperate with the fixed gear (202), so that when the fixed gear (202) rotates clockwise and counterclockwise, the movable intermediate rack (206) can move back and forth; a movable gear (208), the movable gear (208) having a movable rotation axis (210), wherein the movable rotation axis (210) is rotatably fixed to one end of the movable intermediate rack (206), and wherein the movable gear (208) cooperates with the fixed rack (204), so that when the movable intermediate rack (206) reciprocates, the movable gear (208) can reciprocate along the extension direction of the fixed rack (204), and the movable gear (208) is configured to rotate around the movable rotation axis (210) when reciprocating; and a transmission rack (212), the transmission rack (212) being configured to drive the driven member to move back and forth, wherein the transmission rack (212) cooperates with the movable gear (208), so that when the movable gear (208) rotates clockwise and counterclockwise, the transmission rack (212) can move back and forth; The fixed rotating shaft (211) and the fixed rack (204) are arranged on the housing (102) of the driven member, and The housing (202) has a driving guide portion (144) extending along a first direction, wherein the transmission rack (212) is capable of reciprocating along the driving guide portion (144) in the first direction.

12. The drive assembly according to claim 11, characterized in that Also includes: A guide rod (151, 152), wherein the first end of the guide rod (151, 152) is connected to the transmission rack (212), and the second end of the guide rod (151, 152) can pass through the driving guide portion (144) and be connected to the driven member, so that the guide rod (151, 152) can reciprocate along the driving guide portion (144).

13. The drive assembly according to claim 11, characterized in that: The transmission rack (212) has an initial position for transmission rack movement and a final position for transmission rack movement. At the initial moving position of the transmission rack, the movable gear (208) cooperates with the end of the transmission rack (212) away from the driven member, and the fixed gear (202) cooperates with the end of the movable intermediate rack (206) away from the driven member, and At the end position of the transmission rack movement, the movable gear (208) cooperates with an end of the transmission rack (212) close to the driven member, and the fixed gear (202) cooperates with an end of the movable intermediate rack (206) close to the driven member.

14. The drive assembly according to claim 11, characterized in that Also includes: An actuator is configured to drive the fixed gear (202) to rotate.

15. The drive assembly according to claim 11, characterized in that: The driven component is a cover assembly (100) of a charging port or a fuel filler port of a vehicle, and the transmission rack (212) is configured to be able to drive the cover assembly (100) to move back and forth.

16. A vehicle, characterized in that: It comprises a driving assembly (160) for driving a cover assembly (100) according to any one of claims 1 to 15.

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