Water nozzle connecting device and motor drive system

Abstract

The application provides a water nozzle connecting device and a motor driving system. The water nozzle connecting device comprises a sealing member and a fixing assembly. The sealing member is made of flexible material and comprises a tubular body and an interface part formed at the end of the tubular body. The tubular body is compatible with the axial deviation between different water nozzles. The fixing assembly is connected with the interface part. The fixing assembly drives the interface part to move axially along the water nozzle, so that the interface part is sleeved on the water nozzle. The fixing assembly compresses the interface part radially, so that the interface part is sealingly connected with the water nozzle. The application can greatly simplify the connecting operation of the water nozzle and occupies small space.

Description

Technical Field

[0001] This invention relates to a heat dissipation structure for an electric motor and its controller, and more specifically, to a water tap connection device and a motor drive system. Background Technology

[0002] Currently, the integrated design of controllers, motors, and reducers is becoming a trend in motor drive system design. This integrated structure can greatly improve system space utilization, resulting in a smaller and lighter overall system size.

[0003] The controller adopts a flat design, which makes full use of the remaining space between the motor and the reducer, but it also brings great challenges to the connection between the controller and the motor waterway.

[0004] like Figure 1 As shown, in the existing connection method of the cooling water nozzle of the motor and controller, the clamp 12 and the hose 13 are usually used. That is, the hose 13 is first sleeved on the outside of the water nozzle 11, and then the clamp 12 assembled on the outer periphery of the hose 13 is used to apply radial force to the hose 13 so that the hose 13 and the water nozzle 11 are sealed together.

[0005] However, in the above structure that uses clamp 12 and hose 13 to connect the water nozzle 11, the clamp 12 connection process is more complicated, occupies more space, and requires visual observation of the connection status during the connection process, and blind insertion cannot be achieved. Summary of the Invention

[0006] This invention addresses the problems of complex connection process, large space occupation, and inability to achieve blind difference in water faucet connection via clamps and hoses by providing a water faucet connection device and motor drive system.

[0007] The technical solution of this invention to solve the above-mentioned technical problems is to provide a water tap connection device, including a sealing element and a fixing component; wherein:

[0008] The seal is made of a flexible material and includes a tubular body and an interface formed at the end of the tubular body, and the tubular body is compatible with axial deviations between different water taps;

[0009] The fixing component is connected to the interface portion, and the fixing component moves the interface portion along the axial direction of the water nozzle to make the interface portion fit onto the water nozzle, and compresses the interface portion radially to make the interface portion and the water nozzle seal together.

[0010] As a further improvement of the present invention

[0011] The sealing element further includes an outer protruding ring, which is located on the outer periphery of the interface portion;

[0012] The fixing component includes a detachable end ring and a pressure ring, the pressure ring being sleeved on the outside of the interface portion, and the end ring and the pressure ring clamping the outer convex ring.

[0013] As a further improvement of the present invention, the end ring and the pressure ring are connected and can rotate relative to each other.

[0014] As a further improvement of the present invention, the end ring further includes an inner convex ring, which is pressed against the top surface of the outer convex ring and the interface portion.

[0015] As a further improvement of the present invention, the free end of the inner convex ring has a guide surface, which guides the water nozzle to contact the inner wall of the tubular body.

[0016] As a further improvement of the present invention, the inner convex ring is engaged with the top surface of the interface portion.

[0017] As a further improvement of the present invention, the fixing component includes a first fixing component and a second fixing component, the sum of the axial lengths of the first fixing component and the second fixing component is greater than the axial length of the seal, and the seal is located inside the tube hole formed by the first fixing component and the second fixing component.

[0018] As a further improvement of the present invention, the first fixing component has a first latching portion and a first hook portion at one end near the second fixing component; the second fixing component has a second latching portion and a second hook portion at one end near the first fixing component; the second fixing component and the first fixing component are axially fixed and radially movable connected by the cooperation of the first latching portion and the second hook portion and the cooperation of the second latching portion and the first hook portion.

[0019] As a further improvement of the present invention, the first buckle portion includes a first lug protruding toward the second fixing component, and the first lug has a first buckle hole; the first hook portion includes a first wedge-shaped protrusion protruding from the outer periphery of the first fixing component and gradually protruding in a direction away from the second fixing component, and the first wedge-shaped protrusion includes a first connecting surface facing away from the second fixing component and perpendicular to the axial direction of the first fixing component.

[0020] The second latching portion includes a second lug protruding toward the first fixing component, and the second lug has a second latching hole; the second hook portion includes a second wedge-shaped protrusion protruding from the outer periphery of the second fixing component and gradually protruding in a direction away from the first fixing component, and the second wedge-shaped protrusion includes a second connecting surface facing away from the first fixing component and perpendicular to the axial direction of the second fixing component;

[0021] When the second fixing component and the first fixing component are connected, the first connecting surface of the first wedge-shaped protrusion engages with the second fastening hole of the second lug, and the second connecting surface of the second wedge-shaped protrusion engages with the first fastening hole of the first lug. The radial movement of the first connecting surface in the second fastening hole and the radial movement of the second connecting surface in the first fastening hole satisfy the deviation of the central axis of the second fixing component and the first fixing component.

[0022] As a further improvement of the present invention, the width of the first buckle hole in the circumferential direction of the first fixing component is greater than the width of the second wedge-shaped protrusion in the circumferential direction of the second fixing component;

[0023] The width of the second buckle hole in the circumferential direction of the second fixing component is greater than the width of the first wedge-shaped protrusion in the circumferential direction of the first fixing component.

[0024] As a further improvement of the present invention, the end of the first fixing component away from the second fixing component has a first locking portion, and the first fixing component is locked and fixed to the second locking portion on the outer wall of the first water nozzle by the first locking portion; or...

[0025] The end of the second fixing component away from the first fixing component has a third locking part, and the second fixing component is locked to the fourth locking part on the outer wall of the second water nozzle by the third locking part.

[0026] As a further improvement of the present invention, the tubular body of the seal includes a telescopic adjustment section, and the axial dimension of the seal is adjusted by the telescopic adjustment section.

[0027] This invention also provides a motor drive system, including a motor, a motor controller, and a water nozzle connection device as described in any of the preceding claims. The motor includes a first coolant channel and a first water nozzle located at the end of the first coolant channel. The motor controller includes a second coolant channel and a second water nozzle located at the end of the second coolant channel. The first water nozzle and the second water nozzle are connected through the water nozzle connection device.

[0028] The faucet connection device and motor drive system of this invention, through the fixing component fixedly assembled on the interface of the seal, automatically radially squeezes the seal during the process of axially inserting the seal into the faucet, thereby achieving sealing and fixing with the faucet. This greatly simplifies the connection operation of the faucet, occupies little space, and does not require visual inspection of the installation status during assembly, enabling blind insertion. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of an existing water tap connection using clamps and hoses;

[0030] Figure 2 This is a schematic diagram of the water tap connection device provided in an embodiment of the present invention;

[0031] Figure 3 This is an exploded structural diagram of the faucet connection device provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the sealing element in the faucet connection device provided in an embodiment of the present invention;

[0033] Figure 5 This is a cross-sectional structural schematic diagram of the water tap connection device provided in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the first end ring in the water tap connection device provided in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the first pressure ring in the water tap connection device provided in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the structure of the second pressure ring in the water tap connection device provided in an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of the second end ring in the water tap connection device provided in an embodiment of the present invention;

[0038] Figure 10 This is a schematic diagram of the locking structure between the first end ring and the first water nozzle in the water nozzle connection device provided in an embodiment of the present invention;

[0039] Figure 11 This is a schematic diagram of the fastening structure of the first pressure ring and the second pressure ring in the water tap connection device provided in the embodiment of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0041] like Figure 2The diagram shown is a structural schematic of a water nozzle connection device provided in an embodiment of the present invention. This water nozzle connection device can be used to connect a first water nozzle and a second water nozzle. For example, the first water nozzle can be the outlet (or inlet) of the motor coolant channel in a motor drive system, and the second water nozzle can be the inlet (or outlet) of the coolant channel in the motor controller of the same motor drive system. By connecting the first and second water nozzles through the water nozzle connection device, the coolant channels in the motor and the motor controller can be connected. The water nozzle connection device in this embodiment includes a sealing element 21, a first fixing component 22, and a second fixing component 23.

[0042] The seal 21 is made of a flexible material (such as rubber) that can deform under external pressure. In this embodiment, the seal 21 includes a tubular body and a first interface portion and a second interface portion formed at two ends of the tubular body. The inner diameter of the first interface portion is adapted to the outer diameter of the first water tap, and the inner diameter of the second interface portion is adapted to the outer diameter of the second water tap. That is, the first interface portion can be fitted onto the outer wall of the first water tap, and the second interface portion can be fitted onto the outer wall of the second water tap. Through the first interface portion, the seal 21 can be connected to the first water tap; through the second interface portion, the seal 21 can be connected to the second water tap. The tubular body connects the first interface portion and the second interface portion, thereby connecting the first water tap and the second water tap. Furthermore, the tubular body, made of a flexible material, can meet the axial deviation requirements between the first interface portion and the second interface portion.

[0043] The first fixing component 22 is made of a rigid material (such as hard plastic or metal). This first fixing component 22 is assembled onto the first interface portion of the seal 21. The first fixing component 22 drives the first interface portion to move axially along the first water nozzle, causing the first interface portion to fit onto the first water nozzle. Furthermore, it radially compresses the first interface portion to achieve a sealed connection between the first interface portion and the first water nozzle. In other words, the first fixing component 22 enables a sealed connection between the seal 21 and the first water nozzle, as well as the assembly and fixation of the water nozzle connecting device with the first water nozzle.

[0044] The second fixing component 23 is made of a rigid material (such as hard plastic or metal). This second fixing component 23 is assembled onto the second interface portion of the seal 21. The second fixing component 23 moves the second interface portion along the axial direction of the second water nozzle, causing the second interface portion to fit onto the second water nozzle, and radially compresses the second interface portion to achieve a sealed connection with the second water nozzle. In other words, the second fixing component 23 enables a sealed connection between the seal 21 and the second water nozzle, as well as the assembly and fixation of the water nozzle connecting device with the second water nozzle.

[0045] The aforementioned faucet connection device allows for the initial assembly of the sealing element 21, the first fixing component 22, and the second fixing component 23, followed by their respective assembly and fixation to the first and second faucets. By using the first fixing component 22 and the second fixing component 23 to axially move the first and second interface portions at both ends of the sealing element to the first and second faucets, respectively, while simultaneously radially compressing the first and second interface portions, ensuring a sealing connection between the first and second interface portions and the first and second faucets. This significantly simplifies the faucet connection operation, minimizes space requirements, and eliminates the need for visual inspection during assembly, enabling blind insertion. Furthermore, since the sealing element 21 is made of a flexible material, when the central axes of the first and second faucets are not aligned, the bending of the tubular body of the sealing element 21 can meet the requirements for eccentric assembly.

[0046] Of course, in practical applications, the water nozzle connection device of this embodiment may also connect only one water nozzle, for example, only connecting to the outlet (or inlet) of the motor coolant channel in the motor drive system, or only connecting to the inlet (or outlet) of the coolant channel of the motor controller in the motor drive system, so as to allow coolant to flow into (or out of) the corresponding coolant channel. Accordingly, the seal 21 includes only one of the first interface portion and the second interface portion, and the water nozzle connection device also includes only one of the first fixing component 22 and the second fixing component 23.

[0047] Combination Figure 3-4 As shown, in one embodiment of the present invention, the sealing member 21 includes a first protruding ring 212, which protrudes from the outer periphery of the first interface portion (integrated with the first interface portion). Correspondingly, the first fixing component 22 includes a detachable first end ring 221 and a first pressure ring 222, which are respectively made of rigid material and are respectively annular. The inner diameter of the first pressure ring 222 is larger than the outer diameter of the tubular body 211 of the sealing member 21 (i.e., larger than the outer diameter of the first interface portion). The first pressure ring 222 is fitted onto the outside of the first interface portion of the sealing member 21, and the first fixing component 22 is assembled to the first interface portion by clamping the first protruding ring 212 between the first end ring 221 and the first pressure ring 222. The first end ring 221 and the first pressure ring 222 are connected and fixed, and can rotate relative to each other.

[0048] Specifically, in combination Figure 6 , 7As shown, the inner diameter of the first end ring 221 is greater than or equal to the outer diameters of the first pressure ring 222 and the first outer convex ring 212, respectively, and the inner diameter of the first pressure ring 222 is smaller than the outer diameter of the first outer convex ring 212. The inner wall of the first end ring 221 has a protruding first inner convex ring 2213 that is perpendicular to the axial direction of the first end ring 221, and the inner diameter of the first inner convex ring 2213 is smaller than the outer diameter of the first outer convex ring 212. When the first fixing assembly 22 is assembled to the seal 21, the first pressure ring 222 is fitted onto the outside of the first interface portion of the seal 21 and inserted into the first end ring 221. The first inner convex ring 2213 presses against the top surface of the first outer convex ring 212 and the first interface portion, thereby clamping and fixing the first outer convex ring 212 together with the end face of the first pressure ring 222.

[0049] The free end of the first inner convex ring 2213 may also have a first guide surface 2211, which guides the first water nozzle to contact the inner wall of the tubular body. When the water nozzle connecting device is assembled to the first water nozzle, the first guide surface can guide the first water nozzle into the first interface portion of the seal 21 and into contact with the inner wall of the tubular body. Furthermore, after the first interface portion is fitted onto the first water nozzle, the first pressure ring 222 applies radial pressure to the first interface portion, causing the first interface portion to deform, thereby achieving a seal between it and the first water nozzle.

[0050] Furthermore, to improve the sealing effect, an interlocking connection structure can be adopted between the first inner convex ring 2213 and the top surface of the first interface portion. For example, the surface of the second inner convex ring 2322 facing the seal 21 is provided with an annular protrusion 2215 and an annular groove 2216, and the top surface of the second interface portion is also provided with a concave-convex structure corresponding to the annular protrusion 2215 and the annular groove 2216. The interlocking connection structure is achieved by the annular protrusion 2215 and the annular groove 2216 of the second inner convex ring 2322 and the concave-convex structure on the second interface portion.

[0051] Specifically, the first end ring 221 has a plurality of first lugs 2212, which are evenly distributed around the circumference of the first end ring 221 and protrude toward the first pressure ring 222. The outer wall of the first pressure ring 222 has first hooks 2222 corresponding to the plurality of first lugs 2212. When the first pressure ring 222 is inserted into the first end ring 221, the first pressure ring 222 and the first end ring 221 are locked and fixed by the first lugs 2212 and the first hooks 2222. Of course, in practical applications, the first pressure ring 222 and the first end ring 221 can also be locked and fixed by a threaded structure. For example, an external thread is provided on the outer wall of the first pressure ring 222, and a corresponding internal thread is provided on the inner wall of the first end ring 221. The first pressure ring 222 and the first end ring 221 are connected by the aforementioned external and internal threads.

[0052] Combination Figure 3-4As shown, in one embodiment of the present invention, the sealing member 21 includes a second protruding ring 213, which protrudes from the outer periphery of the second interface portion (integrated with the second interface portion). Correspondingly, the second fixing component 23 includes a detachable second end ring 232 and a second pressure ring 231, which are respectively made of rigid material and are respectively annular. The inner diameter of the second pressure ring 231 is larger than the outer diameter of the tubular body 211 of the sealing member 21 (i.e., larger than the outer diameter of the second interface portion). The second pressure ring 231 is fitted onto the outer side of the second interface portion of the sealing member 21, and the second fixing component 23 is assembled to the second interface portion by sandwiching the second protruding ring 213 between the second end ring 232 and the second pressure ring 231. The first end ring 221 and the first pressure ring 222 are connected and fixed, and can rotate relative to each other.

[0053] Specifically, in combination Figure 8 , 9 As shown, the inner diameter of the second end ring 232 is greater than or equal to the outer diameters of the second pressure ring 231 and the second outer convex ring 213, respectively, and the inner diameter of the second pressure ring 231 is smaller than the outer diameter of the second outer convex ring 213. The inner wall of the second end ring 232 has a protruding second inner convex ring 2322 perpendicular to the axial direction of the second end ring 232, and the inner diameter of the second inner convex ring 2322 is smaller than the outer diameter of the second outer convex ring 213. When the second fixing assembly 23 is assembled to the seal 21, the second pressure ring 231 is sleeved on the outside of the second interface portion of the seal 21 and inserted into the second end ring 232. The first inner convex ring 2213 is pressed against the top surface of the first outer convex ring 212 and the first interface portion, thereby clamping and fixing the second outer convex ring 213 together with the end face of the second pressure ring 231.

[0054] The free end of the second inner convex ring 2322 may also have a second guide surface, which guides the second water nozzle to contact the inner wall of the tubular body. When the water nozzle connecting device is assembled to the second water nozzle, the second guide surface can guide the second water nozzle into the second interface portion of the seal 21 and into contact with the inner wall of the tubular body. Furthermore, after the second interface portion is fitted onto the second water nozzle, the second pressure ring 231 applies radial pressure to the second interface portion, causing the second interface portion to deform, thereby achieving a seal between it and the second water nozzle.

[0055] Furthermore, to improve the sealing effect, an interlocking connection structure can be adopted between the second inner convex ring 2322 and the top surface of the second interface. The interlocking connection structure can refer to the interlocking connection structure between the first inner convex ring 2213 and the top surface of the first interface, and will not be described in detail here.

[0056] Specifically, the second end ring 232 has a plurality of second latches 2323, which are evenly distributed along the circumference of the second end ring 232 and protrude toward the second pressure ring 231 respectively. The outer wall of the second pressure ring 231 has second hooks 2312 corresponding to the plurality of second latches 2323 respectively. When the second pressure ring 231 is inserted into the second end ring 232, the second pressure ring 231 and the second end ring 232 are locked and fixed by the second latches 2323 and the second hooks 2312. Of course, in practical applications, the second pressure ring 231 and the second end ring 232 can also be locked and fixed by a threaded structure. For example, an external thread is provided on the outer wall of the second pressure ring 231, and a corresponding internal thread is provided on the inner wall of the second end ring 232. The second pressure ring 231 and the second end ring 232 are connected by the aforementioned external and internal threads.

[0057] Combination Figure 4 As shown, the tubular body 211 of the aforementioned sealing element 21 includes a telescopic adjustment section 2111, which can adjust the axial dimension of the sealing element 21. This allows the water tap connection device to adapt to different distances between the first and second water taps. Specifically, the aforementioned telescopic adjustment section 2111 can employ a bellows structure to achieve axial dimension adjustment.

[0058] Combination Figure 10 As shown, in one embodiment of the present invention, the first fixing component 22 (e.g., the first end ring 221) in the above-mentioned faucet connecting device has a first locking portion 2214 at the end away from the second fixing component 23, and the first fixing component 22 is locked and fixed to the second locking portion 311 on the outer wall of the first faucet 31 by the first locking portion 2214. Specifically, the first locking portion 2214 may be composed of a radially protruding hook, and the second locking portion 311 may be composed of a retaining ring with a notch. The first fixing component 22 and the first faucet 31 are locked and fixed by the engagement of the hook and the retaining ring. In this way, when the faucet connecting device is pulled out from the second faucet, the faucet connecting device can remain on the first faucet 31. Of course, in practical applications, the first locking portion 2214 and the second locking portion 311 can also be locked and fixed by a tight fit.

[0059] Of course, in practical applications, the water tap connection device can also remain on the second water tap when it is pulled out from the first water tap. In this case, the second fixing component 23 (e.g., the second end ring 232) has a third locking part at the end away from the first fixing component 22, and the second fixing component 23 is locked to the fourth locking part on the outer wall of the second water tap by the third locking part.

[0060] In one embodiment of the present invention, in order to effectively protect the seal 21, for example to prevent it from being punctured by an external object, the sum of the axial lengths of the first fixing component 22 and the second fixing component 23 is greater than the axial length of the seal 21, that is, the seal 21 is located in the tube hole formed by the first fixing component 22 and the second fixing component 23, and the radial misalignment between the first fixing component 22 and the second fixing component 23 satisfies the requirement of assembly eccentricity.

[0061] Combination Figure 11 As shown, to limit the relative positions of the first fixing component 22 and the second fixing component 23 of the above-mentioned water tap connection device, in one embodiment of the present invention, the end of the first fixing component 22 (i.e., the first pressure ring 222) near the second fixing component 23 has a first latching portion and a first hooking portion. Correspondingly, the end of the second fixing component 23 (i.e., the second pressure ring 231) near the first fixing component 22 has a second latching portion and a second hooking portion. The second fixing component 23 and the first fixing component 22 are axially fixed and radially movable through the cooperation of the first latching portion and the second hooking portion, and the cooperation of the second latching portion and the first hooking portion. To facilitate the radial movement of the connection part of the first fixing component 22 and the second fixing component 23, the first latching portion and the first hooking portion are 180° apart, and the second latching portion and the second hooking portion are 180° apart.

[0062] Specifically, the first latching portion includes a first lug 2225 protruding toward the second fixing component 23, the first lug 2225 having a first latching hole 2226; the first hook portion includes a first wedge-shaped protrusion 2227 protruding from the outer wall of the first fixing component 22 and gradually protruding in a direction away from the second fixing component 23, the first wedge-shaped protrusion 2227 having a first connecting surface facing away from the second fixing component 23 and perpendicular to the axial direction of the first fixing component 22; correspondingly, the second latching portion includes a second lug 2315 protruding toward the first fixing component 22, the second lug 2315 having a second latching hole 2316; the second hook portion includes a second wedge-shaped protrusion 2317 protruding from the outer wall of the second fixing component 23 and gradually protruding in a direction away from the first fixing component 22, the second wedge-shaped protrusion 2317 having a second connecting surface 2318 facing away from the first fixing component 22 and perpendicular to the axial direction of the second fixing component 23.

[0063] When the second fixing component 23 and the first fixing component 22 are connected, the first connecting surface of the first wedge-shaped protrusion 2227 is engaged with the second fastening hole 2316 of the second lug 2315, and the second connecting surface 2318 of the second wedge-shaped protrusion 2317 is engaged with the first fastening hole 2226 of the first lug 2225. The radial movement of the first connecting surface in the second fastening hole 2316 and the radial movement of the second connecting surface 2318 in the first fastening hole 2226 satisfy the deviation of the central axis of the second fixing component 23 and the first fixing component 22.

[0064] Furthermore, to adjust the central axis deviation between the second fixing component 23 and the first fixing component 22 in different directions, the width of the first fastening hole 2226 in the circumferential direction of the first fixing component 22 is greater than the width of the second wedge-shaped protrusion 2317 in the circumferential direction of the second fixing component 23; simultaneously, the width of the second fastening hole 2316 in the circumferential direction of the second fixing component 23 is greater than the width of the first wedge-shaped protrusion 2227 in the circumferential direction of the first fixing component 22. In this way, the second fixing component 23 and the first fixing component 22 can rotate relative to each other in the circumferential direction, thereby combining the radial movement of the first connecting surface within the second fastening hole 2316 and the radial movement of the second connecting surface 2318 within the first fastening hole 2226 to satisfy the central axis deviation between the second fixing component 23 and the first fixing component 22 in different directions.

[0065] This invention also provides a motor drive device, which can be a drive system in an electric vehicle, a drive system in automated production equipment, etc. In this embodiment, the motor drive device includes a motor, a motor controller, and a water nozzle connection device as described above. The motor includes a first coolant channel and a first water nozzle located at the end of the first coolant channel. The motor controller includes a second coolant channel and a second water nozzle located at the end of the second coolant channel. The first water nozzle and the second water nozzle are connected through the water nozzle connection device.

[0066] In the aforementioned motor drive equipment, the water nozzle connection device can connect the coolant passage between the motor and the motor controller, and the connection operation is convenient and can be blindly inserted.

[0067] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A water tap connection device, characterized in that, Includes seals and fixing components; wherein: The seal is made of a flexible material and includes a tubular body and an interface formed at the end of the tubular body, and the tubular body is compatible with axial deviations between different water taps; The fixing component is connected to the interface portion, and the fixing component moves the interface portion along the axial direction of the water nozzle to make the interface portion fit onto the water nozzle, while simultaneously compressing the interface portion radially to make the interface portion and the water nozzle seal together. The fixing components include a first fixing component and a second fixing component. The sum of the axial lengths of the first fixing component and the second fixing component is greater than the axial length of the seal. The seal is located within the tube hole formed by the first fixing component and the second fixing component. The end of the first fixing component near the second fixing component has a first snap-fit ​​portion and a first hook portion. The end of the second fixing component near the first fixing component has a second snap-fit ​​portion and a second hook portion. The second fixing component and the first fixing component are axially fixed and radially movable through the cooperation of the first snap-fit ​​portion and the second hook portion, as well as the cooperation of the second snap-fit ​​portion and the first hook portion.

2. The faucet connection device according to claim 1, characterized in that, The sealing element further includes an outer protruding ring, which is located on the outer periphery of the interface portion; The fixing component includes a detachable end ring and a pressure ring, the pressure ring being sleeved on the outside of the interface portion, and the end ring and the pressure ring clamping the outer convex ring.

3. The faucet connection device according to claim 2, characterized in that, The end ring and the pressure ring are connected and can rotate relative to each other.

4. The faucet connection device according to claim 2, characterized in that, The end ring also includes an inner convex ring, which is pressed against the top surface of the outer convex ring and the interface portion.

5. The faucet connection device according to claim 4, characterized in that, The free end of the inner convex ring has a guide surface, which guides the water nozzle to contact the inner wall of the tubular body.

6. The faucet connection device according to claim 4, characterized in that, The inner convex ring is engaged with the top surface of the interface portion.

7. The faucet connection device according to claim 1, characterized in that, The first latching portion includes a first lug protruding toward the second fixing component, and the first lug has a first latching hole; the first hook portion includes a first wedge-shaped protrusion protruding from the outer periphery of the first fixing component and gradually protruding in a direction away from the second fixing component, and the first wedge-shaped protrusion includes a first connecting surface facing away from the second fixing component and perpendicular to the axial direction of the first fixing component. The second latching portion includes a second lug protruding toward the first fixing component, and the second lug has a second latching hole; the second hook portion includes a second wedge-shaped protrusion protruding from the outer periphery of the second fixing component and gradually protruding in a direction away from the first fixing component, and the second wedge-shaped protrusion includes a second connecting surface facing away from the first fixing component and perpendicular to the axial direction of the second fixing component; When the second fixing component and the first fixing component are connected, the first connecting surface of the first wedge-shaped protrusion engages with the second fastening hole of the second lug, and the second connecting surface of the second wedge-shaped protrusion engages with the first fastening hole of the first lug. The radial movement of the first connecting surface in the second fastening hole and the radial movement of the second connecting surface in the first fastening hole satisfy the deviation of the central axis of the second fixing component and the first fixing component.

8. The faucet connection device according to claim 7, characterized in that, The width of the first buckle hole in the circumferential direction of the first fixing component is greater than the width of the second wedge-shaped protrusion in the circumferential direction of the second fixing component; The width of the second buckle hole in the circumferential direction of the second fixing component is greater than the width of the first wedge-shaped protrusion in the circumferential direction of the first fixing component.

9. The faucet connection device according to claim 8, characterized in that, The end of the first fixing component away from the second fixing component has a first locking portion, and the first fixing component is locked and fixed to the second locking portion on the outer wall of the first water nozzle by the first locking portion; or, The end of the second fixing component away from the first fixing component has a third locking part, and the second fixing component is locked to the fourth locking part on the outer wall of the second water nozzle by the third locking part.

10. The faucet connection device according to claim 8, characterized in that, The tubular body of the seal includes a telescopic adjustment section, through which the axial dimension of the seal is adjusted.

11. A motor drive system, characterized in that, The device includes a motor, a motor controller, and a water nozzle connection device as described in any one of claims 1-10, wherein the motor includes a first coolant channel and a first water nozzle located at the end of the first coolant channel, the motor controller includes a second coolant channel and a second water nozzle located at the end of the second coolant channel, and the first water nozzle and the second water nozzle are connected through the water nozzle connection device.

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