Universal joint assembly method and system

Abstract

The present invention relates to the technical field of universal joints, and in particular to a universal joint assembly method and system. The universal joint assembly method includes: based on the completion of the positioning of a housing component, an assembly instruction is triggered. Based on the assembly instruction triggering, a rolling component is moved to a set state. Based on the rolling component moving to the set state, a grease injection unit discharges a set volume of grease. Based on the grease injection unit discharging a set volume of grease, the bottom end of the plug-in shaft is moved from the upper end surface of the plug-in hole to the space surrounded by the second groove. In this way, the problem of low universal joint assembly efficiency is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of universal joints, and in particular to a universal joint assembly method and system. Background Art

[0002] A universal joint is a mechanical device that is mainly used to connect two intersecting shafts and transmit power. During the transmission process, the universal joint can ensure the effective transmission of power. Universal joints play a key role in many mechanical transmission systems such as automobiles and machine tools. Universal joints can be divided into cross-axis universal joints, fixed constant velocity universal joints, tripod universal joints, etc. A fixed constant velocity universal joint is a universal joint that can achieve constant velocity transmission in a fixed installation position. Its main feature is that during the working process, the angle between the input shaft and the output shaft is relatively fixed, but it can still ensure that the two shafts rotate at the same angular velocity, thereby achieving accurate and stable power transmission. In the fixed constant velocity universal joint, there are raceways and rolling elements rolling along the raceways. Grease needs to be applied in the moving track of the rolling elements to avoid friction caused by the transmission of power and damage to the universal joint.

[0003] However, when applying grease in the moving track of the current rolling element, it is necessary to manually apply grease on the surface of the track and the rolling element step by step, and this method has low assembly efficiency. Summary of the invention

[0004] In order to solve the problem of low universal joint assembly efficiency, the present invention provides a universal joint assembly method and system.

[0005] In a first aspect, the present invention provides a method for assembling a universal joint, the method comprising:

[0006] Step S10, based on the completion of the positioning of the housing assembly, the assembly instruction is triggered;

[0007] Step S20, based on the assembly instruction trigger, the rolling assembly is moved to a set state; the set state includes the bottom end of part of the rolling assembly abutting against the bottom end of the space surrounded by the shell assembly; the first groove of the shell assembly is connected to the second raceway of the rolling assembly; the first raceway, the second raceway, and the rolling body of the rolling assembly are arranged corresponding to each other; the rolling body is arranged in the space surrounded by the first raceway and the second raceway; the rolling body is slidably connected to the first raceway and / or the rolling body is slidably connected to the second raceway;

[0008] Step S30, based on the rolling assembly moving to the set state, the grease injection unit discharges a set volume of grease; wherein the discharged grease drips from the discharge port of the grease injection unit into the space surrounded by the inner peripheral wall of the plug hole and the space surrounded by the second groove;

[0009] Step S40, based on the grease injection unit discharging a set volume of the grease, moves the bottom end of the plug-in shaft from the upper end surface of the plug-in hole to the space surrounded by the second groove; wherein, in the process of the plug-in shaft moving from the upper end surface of the plug-in hole to the space surrounded by the second groove, the grease in the plug-in hole and the grease in the groove module move from the first groove to the space between the outer circumferential surface of the star-shaped sleeve unit of the shell assembly and the inner circumferential surface of the shell unit of the shell assembly.

[0010] In some embodiments, step S40 includes:

[0011] Step S41, based on the grease injection unit discharging a set volume of the grease, the bottom end of the plug-in shaft moves from the upper end surface of the plug-in hole to a first set position at a first speed;

[0012] Step S42, based on the bottom end of the plug-in shaft moving from the upper end surface of the plug-in hole to the first set position at the first speed, the bottom end of the plug-in shaft moves to the space surrounded by the second groove at a second speed; wherein the second speed is greater than the first speed.

[0013] In some embodiments, step S42 includes:

[0014] Step S421, based on the bottom end of the plug shaft moving from the upper end surface of the plug hole to the first set position at the first speed, the bottom end of the plug shaft moves to the second set position at a third speed; wherein the third speed is greater than the first speed;

[0015] Step S422, based on the bottom end of the plug-in shaft moving to the second set position at a third speed, the bottom end of the plug-in shaft moves to the space surrounded by the second groove at a fourth speed; wherein the third speed is greater than the fourth speed, and the first speed is less than the fourth speed.

[0016] In some embodiments, step S40 includes:

[0017] Step S43, obtaining the liquid level of the grease in the plug hole based on the grease injection unit discharging a set volume of the grease;

[0018] Step S44, based on the liquid level of the grease in the plug hole being a first height that is an abnormal height, obtaining a difference between the first height and a standard liquid level; wherein the first height is lower than the standard liquid level;

[0019] Step S45, based on the difference between the first height and the standard liquid level, obtaining the volume S of the grease liquid level rising from the first height to the standard liquid level;

[0020] Step S46, based on S, the grease injection unit discharges S*K grease into the plug hole; wherein K>1;

[0021] Step S47, based on the grease injection unit discharging S*K of grease into the plug-in hole, the bottom end of the plug-in shaft is moved from the upper end surface of the plug-in hole to the space surrounded by the second groove.

[0022] In some embodiments, the universal joint assembly method further comprises:

[0023] Step S48, based on the bottom end of the plug-in shaft being moved from the upper end surface of the plug-in hole to the space surrounded by the second groove and the grease level in the plug-in hole being the abnormal height after the grease injection timing is set, obtaining the number of times N that the grease level in the plug-in hole is continuously the abnormal height after the grease injection timing is set; wherein the grease injection timing is set including the grease level in the plug-in hole before the grease injection unit discharges the grease into the plug-in hole;

[0024] Step S49: Based on N being greater than a set number of times, the volume of the grease discharged by the grease injection unit is adjusted.

[0025] In some embodiments, step S49 includes:

[0026] Step S491, based on N being greater than a set number of times, obtaining adjustment reference data; wherein the adjustment reference data includes the temperature near the discharge port;

[0027] Step S492: based on the temperature near the discharge port being lower than a set temperature range, increasing the volume of the grease discharged by the grease injection unit.

[0028] In some embodiments, the universal joint assembly method further comprises:

[0029] Step S493, based on the temperature near the outlet being lower than the set temperature range, heating the outlet to the set temperature range.

[0030] In some embodiments, the adjustment reference data in step S491 also includes the volume S1 and weight W of the grease in the storage portion of the grease injection unit, and the volume S2 corresponding to the weight W of the grease in the storage portion;

[0031] The universal joint assembly method also includes:

[0032] Step S494, based on S1>S2, obtain the difference S3 between S1 and S2;

[0033] Step S495: based on the fact that S3 is greater than a set volume, the exhaust part of the grease injection unit drives the storage part to vibrate for a set time.

[0034] In a second aspect, the present invention provides a universal joint assembly system, the universal joint assembly system is applied to any universal joint assembly method in the first aspect, the universal joint assembly system comprises:

[0035] A shell assembly, the shell assembly comprises a shell unit and an end cover unit; the shell unit comprises an outer shell and a first raceway; the outer shell is configured as a cylindrical body; the first raceway is recessed from the inner circumference of the outer shell toward the outer circumference of the outer shell; the end cover unit comprises an end cover body and a groove module; the end cover body is fixedly connected to one end of the outer shell in the length direction; the groove module comprises a first groove and a second groove; the second groove is recessed from a side of the end cover body close to the outer shell along the axial direction of the outer shell toward a direction away from the outer shell; the first groove is recessed from a side of the end cover body close to the outer shell along the axial direction of the outer shell toward a direction away from the outer shell; the first groove is arranged on the peripheral side of the second groove; the first groove is connected to the second groove;

[0036] A rolling assembly, the rolling assembly comprising a star-shaped sleeve unit and a rolling body; the star-shaped sleeve unit comprising a star-shaped sleeve body, a second raceway and a plug-in hole; the plug-in hole penetrates from one end of the star-shaped sleeve body to the other end along the axial direction of the star-shaped sleeve body; the second raceway is recessed from the outer circumferential surface of the star-shaped sleeve body toward the plug-in hole;

[0037] A plug-in shaft, the outer circumference of which is adapted to the inner circumference of the plug-in hole;

[0038] A tooling assembly, the tooling assembly comprising a base unit and a grease injection unit; the base unit comprises a base, a first driving part, and a second driving part; the base is detachably connected to the first driving part and the second driving part respectively; the grease injection unit comprises a discharge port, a storage part, and grease; the grease is arranged in a space surrounded by the storage part;

[0039] The universal joint assembly system includes a first assembly state and a second assembly state; the first assembly state includes the star-shaped sleeve being located in the space surrounded by the shell; the bottom end of the star-shaped sleeve being in contact with the end cover; the first raceway, the second raceway, and the rolling body being arranged correspondingly to each other; the rolling body of the rolling assembly being arranged in the space surrounded by the first raceway and the second raceway; the rolling body being in sliding connection with the first raceway and / or the rolling body being in sliding connection with the second raceway; the discharge port discharges the grease to drip onto the inner circumferential wall of the plug hole and the groove module; the second assembly state includes the star-shaped sleeve being located in the space surrounded by the shell; the bottom end of the star-shaped sleeve being in contact with the end cover The first raceway, the second raceway and the rolling body are arranged corresponding to each other; the rolling body of the rolling assembly is arranged in the space surrounded by the first raceway and the second raceway; the rolling body is slidably connected to the first raceway and / or the rolling body is slidably connected to the second raceway; the outer peripheral wall of the plug-in shaft abuts against the inner peripheral wall of the plug-in hole; the bottom end of the plug-in shaft is moved from the upper end surface of the plug-in hole to the space surrounded by the second groove, and during the movement of the plug-in shaft, the grease in the plug-in hole and the grease in the groove module move from the first groove to the space between the outer peripheral surface of the star-shaped sleeve unit of the shell assembly and the inner peripheral surface of the shell unit of the shell assembly.

[0040] In some embodiments, when the bottom end of the star-shaped sleeve unit abuts against the bottom end of the space enclosed by the shell assembly, the first groove is located within the projection area of ​​the second raceway in the direction from the shell to the end cover body.

[0041] In order to solve the problem of low universal joint assembly efficiency, the present invention has the following advantages:

[0042] When the bottom end of the plug-in shaft moves from the upper end surface of the plug-in hole to the space surrounded by the second groove, the grease in the plug-in hole and the grease in the groove module are subjected to the extrusion force of the downward pressure of the plug-in shaft, and the grease in the second groove can enter the space surrounded by the first raceway and the second raceway through the first groove, and the grease in the plug-in hole can enter the gap between the plug-in shaft and the plug-in hole for lubrication, thereby completing the filling of the grease and further improving the filling efficiency of the grease. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A flow chart showing a method for assembling a universal joint according to an embodiment;

[0044] Figure 2 A schematic diagram of a universal joint assembly system according to an embodiment is shown;

[0045] Figure 3 A schematic diagram showing a splice shaft of a universal joint assembly system according to an embodiment;

[0046] Figure 4 A schematic diagram of a first groove of an embodiment is shown;

[0047] Figure 5 A schematic diagram of a star-shaped sleeve unit according to an embodiment is shown;

[0048] Figure 6 A schematic diagram of a holding unit according to an embodiment is shown.

[0049] Figure markings: shell assembly 01; shell unit 11; shell 111; first raceway 112; end cover unit 12; end cover body 121; groove module 122; first groove 1221; second groove 1222; end face tooth 123; connecting part 124; rolling assembly 02; retaining unit 21; retaining body 211; limiting hole 212; star sleeve unit 22; star sleeve body 221; second raceway 222; plug-in hole 223; rolling body 23; plug-in shaft 03; tooling assembly 04; base unit 41; base 411; first drive part 412; second drive part 413. DETAILED DESCRIPTION

[0050] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0051] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0052] In the present embodiment, the fixed constant velocity universal joint is a universal joint that can achieve constant velocity transmission in a fixed installation position. Its main feature is that during operation, the angle between the input shaft and the output shaft is relatively fixed, but it can still ensure that the two shafts rotate at the same angular velocity, thereby achieving accurate and stable power transmission. In the fixed constant velocity universal joint, there are raceways and rolling bodies rolling along the raceways. In order to avoid damage to the universal joint caused by friction caused by power transmission, grease needs to be applied to the moving track of the rolling body. However, when applying grease to the moving track of the current rolling body, it is necessary to manually apply it step by step on the surface of the track and the rolling body, and this method has low assembly efficiency. Therefore, in order to solve the above problems, the present invention provides a universal joint assembly method.

[0053] Universal joint assembly system can be applied to universal joint assembly methods, such as Figure 2As shown, the universal joint assembly system may include a housing assembly 01 , a rolling assembly 02 , a plug-in shaft 03 , and a tooling assembly 04 .

[0054] The housing assembly 01 may include a housing unit 11 and an end cover unit 12. The housing unit 11 may include a housing 111 and a first raceway 112. The housing 111 may be configured as a cylindrical body. The first raceway 112 is recessed from the inner circumference of the housing 111 toward the outer circumference of the housing 111. The end cover unit 12 may include an end cover body 121 and a groove module 122. The end cover body 121 may be fixedly connected to one end of the housing 111 in the length direction. The groove module 122 may include a first groove 1221 and a second groove 1222. The second groove 1222 may be recessed from the side of the end cover body 121 close to the housing 111 along the axial direction of the housing 111 toward a direction away from the housing 111. The first groove 1221 may be recessed from the side of the end cover body 121 close to the housing 111 along the axial direction of the housing 111 toward a direction away from the housing 111. The first groove 1221 may be disposed on the circumferential side of the second groove 1222. The first groove 1221 may be connected to the second groove 1222.

[0055] The rolling assembly 02 may include a star-shaped sleeve unit 22 and a rolling body 23. The star-shaped sleeve unit 22 may include a star-shaped sleeve body 221, a second raceway 222, and a plug hole 223. The plug hole 223 may penetrate from one end of the star-shaped sleeve body 221 to the other end along the axial direction of the star-shaped sleeve body 221. The second raceway 222 may be recessed from the outer circumferential surface of the star-shaped sleeve body 221 toward the plug hole 223.

[0056] like Figure 3 As shown, the outer circumference of the plug-in shaft 03 can be matched with the inner circumference of the plug-in hole 223 .

[0057] The tooling assembly 04 may include a base unit 41 and a grease injection unit. The base unit 41 may include a base 411, a first drive unit 412, and a second drive unit 413. The base 411 may be detachably connected to the first drive unit 412 and the second drive unit 413, respectively. The first drive may move the rolling assembly 02 into the space surrounded by the housing 111 assembly, and the second drive unit 413 may assemble the outer circumference of the plug shaft 03 with the inner circumference of the plug hole 223. The grease injection unit may include a discharge port, a storage unit, and grease. The grease may be disposed in the space surrounded by the storage unit.

[0058] like Figure 1 As shown, the present invention provides a universal joint assembly method, which may include steps S10 to S40. Steps S10 to S40 may be described in detail below.

[0059] Step S10, based on the completion of the positioning of the housing component 01, the assembly instruction is triggered, so that preparations can be made in advance for the assembly of the universal joint.

[0060] Step S20, based on the assembly instruction trigger, the first driving unit 412 can move the rolling assembly 02 to a set state. The set state can include that the bottom end of a part of the rolling assembly 02 abuts against the bottom end of the space surrounded by the shell assembly 01. The first groove 1221 of the shell assembly 01 can be connected to the second raceway 222 of the rolling assembly 02. The first raceway 112, the second raceway 222, and the rolling body 23 of the rolling assembly 02 can be arranged corresponding to each other. The rolling body 23 can be arranged in the space surrounded by the first raceway 112 and the second raceway 222. The rolling body 23 can be slidably connected to the first raceway 112 and / or the rolling body 23 can be slidably connected to the second raceway 222. Thereby, the rolling body 23 can roll in the first raceway 112 and the second raceway 222, so that the shell 111 and the star-shaped sleeve unit 22 can move relative to each other along the length direction of the shell 111.

[0061] Step S30, based on the rolling assembly 02 moving to the set state, the grease injection unit can discharge a set volume of grease. The discharged grease drips from the discharge port of the grease injection unit into the space surrounded by the inner circumferential wall of the plug hole 223 and the space surrounded by the second groove 1222. Since the second groove 1222 is connected to the first groove 1221, the grease in the space surrounded by the second groove 1222 can move through the first groove 1221 to the space surrounded by the first raceway 112 and the second raceway 222. Thereby improving the efficiency of grease filling. Grease can reduce the wear of the housing assembly 01 and the rolling assembly 02, thereby reducing the loss of the housing assembly 01 and the rolling assembly 02.

[0062] Step S40, based on the grease injection unit discharging a set volume of grease, the second driving unit 413 can drive the bottom end of the plug shaft 03 to move from the upper end surface of the plug hole 223 to the space surrounded by the second groove 1222. The plug shaft 03 moves from the upper end surface of the plug hole 223 to the second groove 1222. When the plug shaft 03 is assembled with the plug hole 223, a part of the plug shaft 03 is required to be used as a guide for the installation of the plug shaft 03. However, the outer peripheral surface of the plug shaft 03 used for the guiding part does not contact the inner peripheral surface of the plug hole 223 after the assembly is completed, so the plug shaft 03 used for the guiding part can be located in the second groove 1222 after the assembly is completed. When the housing assembly 01 and the rolling assembly 02 move relative to each other, there can be a certain gap between the second groove 1222 and the lower end surface of the plug shaft 03 to prevent the end cover body 121 from colliding with the lower end surface of the plug shaft 03 to cause damage to the end cover body 121 and the plug shaft 03. The grease in the plug hole 223 and the grease in the groove module 122 move from the first groove 1221 to the space between the outer circumference of the star sleeve unit 22 of the housing assembly 01 and the inner circumference of the housing unit 11 of the housing assembly 01. In this way, the grease in the plug hole 223 and the grease in the groove module 122 are squeezed by the downward pressure of the plug shaft 03, and the grease in the second groove 1222 can enter the space surrounded by the first raceway 112 and the second raceway 222 through the first groove 1221, and the grease in the plug hole 223 can enter the gap between the plug shaft 03 and the plug hole 223 for lubrication, thereby completing the filling of the grease, thereby improving the filling efficiency of the grease.

[0063] In this embodiment, step S40 of the universal joint assembly method may include step S41 and step S42. Step S41 and step S42 will be described in detail below.

[0064] Step S41, based on the grease injection unit discharging a set volume of grease, the second drive unit 413 can move the bottom end of the plug shaft 03 from the upper end surface of the plug hole 223 to the first set position at a first speed. The first set position can be a position halfway along the axial direction of the plug hole 223. In order to control costs, the grease injection unit discharges a set volume of grease that will only accumulate to a position halfway along the axial direction of the plug hole 223 at most, so that when the plug shaft 03 is pressed down, less grease is attached to the upper half of the inner circumferential wall of the plug hole 223, so the plug shaft 03 moves from the upper end surface of the plug hole 223 to the first set position at a first speed, so that the slower first speed can reduce the friction between the inner circumferential wall of the plug hole 223 and the plug shaft 03, thereby reducing the loss of the inner circumferential wall of the plug hole 223 and the plug shaft 03.

[0065] Step S42, based on the bottom end of the plug shaft 03 moving from the upper end surface of the plug hole 223 to the first set position at the first speed, the second driving part 413 can drive the bottom end of the plug shaft 03 to move to the space surrounded by the second groove 1222 at the second speed. The second speed is greater than the first speed. In this way, when the bottom end of the plug shaft 03 moves to the first set position, the bottom end of the plug shaft 03 can move to the space surrounded by the second groove 1222 at a faster second speed after contacting the grease. Due to the faster speed, the pressure is greater. The grease in the second groove 1222 enters the space surrounded by the first raceway 112 and the second raceway 222 through the first groove 1221. The grease entering through the first groove 1221 can be sprayed to the upper part of the inner circumferential wall of the housing component 01 and the upper part of the outer wall of the rolling component 02 due to the greater pressure. The grease can slide down under the action of gravity, so that the contact area between the grease and the inner circumferential surface of the housing component 01 is large, and the contact area between the grease and the outer circumferential surface of the rolling component 02 is large, so that the gap between the housing component 01 and the rolling component 02 can be fully lubricated. The grease can move from bottom to top between the plug shaft 03 and the plug hole 223 to fully lubricate the plug hole 223 and the plug shaft 03. In this way, the filling of grease is completed through the installation of the plug-in hole 223, thereby improving the assembly efficiency of the plug-in shaft 03.

[0066] In this embodiment, step S42 of the universal joint assembly method may include step S421 and step S422. Step S421 and step S422 may be described in detail below.

[0067] Step S421, based on the bottom end of the plug shaft 03 moving from the upper end surface of the plug hole 223 to the first set position at the first speed, the second driving part 413 can drive the bottom end of the plug shaft 03 to move to the second set position at the third speed. The third speed is greater than the first speed. The second set position can be the lower end surface of the plug hole 223. In this way, the bottom end of the plug shaft 03 is moved to the second set position at a faster third speed. Due to the faster speed, the pressure of the plug shaft 03 on the grease is greater, and the grease can move from bottom to top between the plug shaft 03 and the plug hole 223 to fully lubricate the plug hole 223 and the plug shaft 03. At the same time, when the grease in the second groove 1222 enters the space surrounded by the first raceway 112 and the second raceway 222 through the first groove 1221, the grease can be directly sprayed from the first groove 1221 to the upper part of the inner wall of the housing component 01 and the upper part of the outer wall of the rolling component 02 because of the strong pressure and impact force of the grease. The grease can slide down under the action of gravity, so that the contact area between the grease and the inner circumference of the housing component 01 is large, and the contact area between the grease and the outer circumference of the rolling component 02 is large. The places with a small gap between the housing component 01 and the star-shaped sleeve unit 22 will also be fully in contact with the grease due to the pressure of the second groove 1222. This ensures that the grease is fully filled and reduces the friction loss of the housing component 01, the star-shaped sleeve unit 22 and the rolling body 23.

[0068] Step S422, based on the bottom end of the plug shaft 03 moving to the second set position at the third speed, the bottom end of the plug shaft 03 moves to the space surrounded by the second groove 1222 at the fourth speed. The third speed is greater than the fourth speed, and the first speed is less than the fourth speed. In this way, the plug shaft 03 moves to the space surrounded by the second groove 1222 at the slower fourth speed, thereby avoiding collision with the bottom end of the second groove 1222 due to excessive speed, and avoiding damage to the part where the plug shaft 03 is connected to the plug hole 223.

[0069] In this embodiment, the tooling assembly 04 may further include a detection unit, which may obtain the liquid level of the grease in the plug hole 223 .

[0070] Step S40 of the universal joint assembly method may include steps S43 to S47, and steps S43 to S47 may be described in detail below.

[0071] Step S43, based on the grease injection unit discharging a set volume of grease, the detection unit can obtain the liquid level of the grease in the plug hole 223. Thus, the liquid level of the grease in the plug hole 223 can be used to determine whether the amount of grease injected into the plug hole 223 is qualified.

[0072] Step S44, based on the first height of the liquid level of the grease in the plug hole 223 being an abnormal height, obtain the difference between the first height and the standard liquid level. Among them, the first height is lower than the standard liquid level. At this time, it can be judged that there is air in the grease in the storage part and / or because the temperature of the discharge port is relatively low, more grease adheres to the discharge port, so that when the discharge port discharges the grease, the grease discharged from the discharge port will adhere to the surrounding side of the discharge port, thereby causing the liquid level of the grease in the plug hole 223 to be lower than the standard liquid level. When the grease is in the storage part, there may be gas in the grease. The storage part has only one outlet, and the moving path of the gas from the grease to the external space is long, making it difficult to discharge. When the discharge port sucks in the grease in the storage part, the air and the grease are sucked in together. When the grease is discharged from the discharge port, the grease will be in the shape of long strips. The contact area between the grease and the external space per unit weight is large, and the distance for the gas in the grease to be discharged to the external space is short. Therefore, when the grease drips into the plug hole 223, the gas in the grease will be discharged, causing the liquid level of the grease in the plug hole 223 to be lower than the standard liquid level.

[0073] In step S45, based on the difference between the first height and the standard liquid level height, the detection unit may obtain the volume S of the grease liquid level rising from the first height to the standard liquid level height.

[0074] Step S46, based on S, the grease injection unit discharges S*K of grease from the plug hole 223, so that the grease liquid level in the plug hole 223 reaches the standard liquid level. Wherein, K>1. In this way, when the input amount of grease sucked out from the storage part by the discharge port enters the plug hole 223, the grease in the storage part contains air, or adheres to the surrounding side of the discharge port, resulting in the second replenishment of grease weight is still insufficient. Therefore, in order to avoid the weight of the plug hole 223 is still insufficient after the second grease replenishment, a certain amount of grease can be added, that is, the grease injection unit discharges S*K of grease from the plug hole 223, K>1, so that the need for the third replenishment of grease to the plug hole 223 can be avoided. Even if there is more grease in the plug hole 223, it will not have a negative impact on the assembly of the universal joint, thereby avoiding the insufficient grease liquid level of the plug hole 223 after the grease is replenished.

[0075] Step S47, based on the grease injection unit discharging S*K of grease from the plug hole 223, the bottom end of the plug shaft 03 is moved from the upper end surface of the plug hole 223 to the space surrounded by the second groove 1222. In this way, when the grease in the plug hole 223 is insufficient, the grease is added through the grease injection unit to meet the required grease weight. Then, the bottom end of the plug shaft 03 is moved from the upper end surface of the plug hole 223 to the lower end surface of the plug hole 223 to assemble the universal joint.

[0076] In this embodiment, the universal joint assembly method may include steps S48 and S49, and steps S48 and S49 may be described in detail below.

[0077] Step S48, based on the bottom end of the plug shaft 03 being moved from the upper end surface of the plug hole 223 to the space surrounded by the second groove 1222 and the grease level in the plug hole 223 being at an abnormal height after the grease injection timing is set, the number of times N that the grease level in the plug hole 223 is continuously at an abnormal height after the grease injection timing is set is obtained. The setting of the grease injection timing may include the grease level in the plug hole 223 being set to the previous time the grease injection unit discharges the grease into the plug hole 223.

[0078] Step S49, based on N being greater than the set number of times, the volume of grease discharged by the grease injection unit is adjusted. At this time, the liquid level of the grease in the plug hole 223 is continuously detected as abnormal for a large number of times, so the volume of grease discharged by the grease injection unit is adjusted to ensure that the volume of grease discharged by the grease injection unit each time meets the standard liquid level of the grease in the plug hole 223, thereby minimizing the need for secondary grease replenishment and improving the efficiency of filling the grease in the plug hole 223.

[0079] In this embodiment, step S49 of the universal joint assembly method may include step S491 and step S492. Step S491 and step S492 may be described in detail below.

[0080] Step S491, based on N being greater than the set number of times, obtain adjustment reference data. The adjustment reference data may include the temperature near the discharge port. If the temperature near the discharge port is too low, more grease will adhere to the discharge port, resulting in less grease in the plug hole 223, so the volume of grease discharged by the grease injection unit needs to be adjusted. This ensures that the grease injection unit completes the grease filling in the plug hole 223 at one time.

[0081] Step S492, based on the temperature near the discharge port being lower than the set temperature range, the volume of the grease discharged by the grease injection unit is increased. The lower temperature near the discharge port causes the grease near the discharge port to solidify and adhere to the discharge port, so the volume of the grease discharged by the grease injection unit is increased to ensure that the required grease weight in the plug hole 223 is met.

[0082] In this embodiment, the grease injection unit may further include a heating portion, and the heating portion may heat the discharge port to ensure the output volume of the discharge port.

[0083] The universal joint assembly method may include step S493, and step S493 may be described in detail below.

[0084] Step S493, based on the temperature near the discharge port being lower than the set temperature range, the heating unit heats the discharge port to the set temperature range. Since the temperature near the discharge port is too low, more grease adheres to the discharge port, so the discharge port is heated to the set temperature range, thereby improving the fluidity of the grease. Less grease adheres to the discharge port. In addition, the discharge port is easy to heat, the heating efficiency is fast and more energy-saving.

[0085] In this embodiment, the grease injection unit may include an exhaust portion, which may be drivingly connected to the storage portion to exhaust the air in the grease inside the storage portion to the external space through vibration.

[0086] The adjustment reference data in step S491 may also include the volume S1 and weight W of the grease in the storage part of the grease injection unit, and the volume S2 corresponding to the weight W of the grease in the storage part.

[0087] Step S49 of the universal joint assembly method may further include step S494 and step S495, which may be described in detail below.

[0088] Step S494: based on S1>S2, the larger S1 is, the more air there is in the lubricating grease in the storage part, and the difference S3 between S1 and S2 can be obtained. S3 is the volume of air in the lubricating grease in the storage part.

[0089] Step S495, based on the fact that S3 is greater than the set volume, it can be determined that there is a lot of air in the grease inside the storage part, and the exhaust part of the grease injection unit can drive the storage part to vibrate for a set time. In this way, when there is a lot of air in the grease in the storage part, the grease in the storage part can be discharged to the external space through the vibration of the exhaust part, so that the grease discharged from the discharge port contains less air, thereby improving the efficiency of adding grease to the plug hole 223.

[0090] In this embodiment, the universal joint assembly system can be applied to any universal joint assembly method in the above embodiments, such as Figure 2 As shown, the universal joint assembly system may include a housing assembly 01 , a rolling assembly 02 , a plug-in shaft 03 , and a tooling assembly 04 .

[0091] like Figure 2As shown, the housing assembly 01 may include a housing unit 11 and an end cover unit 12. The housing unit 11 may include a housing 111 and a first raceway 112. The housing 111 may be configured as a cylindrical body. The first raceway 112 may be recessed from the inner circumference of the housing 111 toward the outer circumference of the housing 111. The end cover unit 12 may include an end cover body 121 and a groove module 122. The end cover body 121 may be fixedly connected to one end of the housing 111 in the length direction, and the end cover body 121 cooperates with the housing 111 to protect the rolling assembly 02 and the plug-in shaft 03 from the intrusion of impurities such as dust, moisture, and debris from the outside, and may prevent the leakage of grease. The groove module 122 may include a first groove 1221 and a second groove 1222. The second groove 1222 may be recessed from the side of the end cover body 121 close to the housing 111 along the axial direction of the housing 111 toward a direction away from the housing 111. The first groove 1221 may be recessed from the side of the end cover body 121 close to the housing 111 along the axial direction of the housing 111 toward a direction away from the housing 111. The first groove 1221 may be arranged on the circumferential side of the second groove 1222. The first groove 1221 may be connected to the second groove 1222. In this way, the grease may flow into the gap between the housing assembly 01 and the rolling assembly 02 through the first groove 1221.

[0092] like Figure 3 , Figure 5 As shown, the rolling assembly 02 may include a star-shaped sleeve unit 22 and a rolling body 23. The star-shaped sleeve unit 22 may include a star-shaped sleeve body 221, a second raceway 222, and a plug-in hole 223. The plug-in hole 223 may penetrate from one end of the star-shaped sleeve body 221 to the other end along the axial direction of the star-shaped sleeve body 221. The second raceway 222 may be recessed from the outer circumferential surface of the star-shaped sleeve body 221 toward the plug-in hole 223. In this way, the rolling body 23 may be inside the first raceway 112 and the second raceway 222, thereby ensuring that the rolling body 23 can achieve smooth and uniform rolling at a fixed angle. The outer circumferential surface of the plug-in shaft 03 may be adapted to the inner circumferential surface of the plug-in hole 223. Thus, the plug-in shaft 03 may be assembled with the plug-in hole 223.

[0093] like Figure 2As shown, the tooling assembly 04 may include a base unit 41 and a grease injection unit. The base unit 41 may include a base 411, a first drive unit 412, and a second drive unit 413. The base 411 may bear and fix the positions of the housing assembly 01, the rolling assembly 02, and the plug-in shaft 03. The base 411 may be detachably connected to the first drive unit 412 and the second drive unit 413, respectively, and the first drive unit 412 may move the plug-in shaft 03 from the upper end surface of the plug-in hole 223 to the lower end surface of the plug-in hole 223. The second drive unit 413 may move the plug-in shaft 03 from the upper end surface of the plug-in hole 223 toward the space surrounded by the second groove 1222. The grease injection unit may include a discharge port, a storage unit, and grease. The grease is arranged in the space surrounded by the storage unit, so that the grease injection unit can complete the filling of the plug-in hole 223 with grease.

[0094] The universal joint assembly system may include a first assembly state and a second assembly state. The first assembly state may include the star-shaped sleeve 221 being located in the space surrounded by the housing 111. The bottom end of the star-shaped sleeve 221 abuts against the end cover 121. The first raceway 112, the second raceway 222, and the rolling body 23 are arranged correspondingly to each other. The rolling body 23 of the rolling assembly 02 is arranged in the space surrounded by the first raceway 112 and the second raceway 222. The rolling body 23 is slidably connected to the first raceway 112 and / or the rolling body 23 is slidably connected to the second raceway 222. The grease discharged from the discharge port drips onto the inner circumferential wall of the plug hole 223 and the groove module 122. In this way, before the plug shaft 03 is assembled, the housing assembly 01 and the rolling assembly 02 can be assembled, and there is enough grease in the plug hole 223. The second assembly state may include the star-shaped sleeve 221 being located in the space surrounded by the housing 111. The bottom end of the star-shaped sleeve 221 abuts against the end cover 121. The first raceway 112, the second raceway 222, and the rolling body 23 are arranged corresponding to each other. The rolling body 23 of the rolling assembly 02 is arranged in the space surrounded by the first raceway 112 and the second raceway 222. The rolling body 23 is slidably connected to the first raceway 112 and / or the rolling body 23 is slidably connected to the second raceway 222. The outer peripheral wall of the plug shaft 03 abuts against the inner peripheral wall of the plug hole 223. The bottom end of the plug shaft 03 is moved from the upper end surface of the plug hole 223 to the space surrounded by the second groove 1222. During the movement of the plug shaft 03, the grease in the plug hole 223 and the grease in the groove module 122 are moved from the first groove 1221 to the space between the outer peripheral surface of the star sleeve unit 22 of the housing assembly 01 and the inner peripheral surface of the housing unit 11 of the housing assembly 01. When the plug-in shaft 03 is pressed downward, the grease can flow through the first groove 1221 to the gap between the housing assembly 01 and the rolling assembly 02, thereby ensuring sufficient filling of the grease and reducing the wear of the rolling body 23 and the rotation of the plug-in shaft 03.

[0095] In other implementations, such as Figure 6As shown, the rolling assembly 02 further includes a retaining unit 21, which may include a retaining body 211 and a limiting hole 212. The retaining body 211 is provided with a plurality of limiting holes 212, and the number of the limiting holes 212 corresponds to the number of the rolling body 23. The retaining body 211 is located on the outer peripheral side of the rolling body 23.

[0096] like Figure 3 As shown, the end cover unit 12 may include a connecting portion 124 and an end face tooth 123. The connecting portion 124 is detachably connected to one end of the housing 111 close to the base 411. The end face tooth 123 is detachably connected to one end of the connecting portion 124 close to the base 411. The end face tooth 123 may cooperate with other components to perform transmission.

[0097] In this embodiment, if Figure 4 As shown, when the bottom end of the star-shaped sleeve unit 22 can abut against the bottom end of the space surrounded by the housing assembly 01, the first groove 1221 is located in the projection area of ​​the second raceway 222 in the direction from the housing 111 to the end cover body 121. The first groove 1221 corresponds to the second raceway 222, reducing the cutting amount, thereby ensuring the strength of the end cover body 121.

[0098] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A universal joint assembly method, characterized in that: The universal joint assembly method comprises: Step S10, based on the completion of the positioning of the housing assembly, the assembly instruction is triggered; Step S20, based on the assembly instruction trigger, the rolling assembly is moved to a set state; the set state includes the bottom end of part of the rolling assembly abutting against the bottom end of the space surrounded by the shell assembly; the first groove of the shell assembly is connected to the second raceway of the star-shaped sleeve unit of the rolling assembly; the first raceway of the shell assembly, the second raceway, and the rolling body of the rolling assembly are arranged corresponding to each other; the rolling body is arranged in the space surrounded by the first raceway and the second raceway; the rolling body is slidably connected to the first raceway and / or the rolling body is slidably connected to the second raceway; Step S30, based on the rolling assembly moving to the set state, the grease injection unit discharges a set volume of grease; wherein the discharged grease drips from the discharge port of the grease injection unit into the space surrounded by the inner circumferential wall of the plug hole and the space surrounded by the second groove; the groove module includes the first groove and the second groove; the first groove is connected to the second groove; Step S40, based on the grease injection unit discharging a set volume of the grease, the bottom end of the plug shaft is moved from the upper end surface of the plug hole to the space surrounded by the second groove; wherein, in the process of the plug shaft moving from the upper end surface of the plug hole to the space surrounded by the second groove, the grease in the plug hole and the grease in the groove module are moved from the first groove to the space between the outer circumference of the star-shaped sleeve unit of the rolling assembly and the inner circumference of the shell unit of the shell assembly; The step S40 comprises: Step S41, based on the grease injection unit discharging a set volume of the grease, the bottom end of the plug-in shaft moves from the upper end surface of the plug-in hole to a first set position at a first speed; Step S42, based on the bottom end of the plug-in shaft moving from the upper end surface of the plug-in hole to the first set position at the first speed, the bottom end of the plug-in shaft moves to the space surrounded by the second groove at a second speed; wherein the second speed is greater than the first speed.

2. A universal joint assembly method according to claim 1, characterized in that: The step S42 comprises: Step S421, based on the bottom end of the plug shaft moving from the upper end surface of the plug hole to the first set position at the first speed, the bottom end of the plug shaft moves to the second set position at a third speed; wherein the third speed is greater than the first speed; Step S422, based on the bottom end of the plug-in shaft moving to the second set position at a third speed, the bottom end of the plug-in shaft moves to the space surrounded by the second groove at a fourth speed; wherein the third speed is greater than the fourth speed, and the first speed is less than the fourth speed.

3. A universal joint assembly method according to claim 1, characterized in that: The step S40 comprises: Step S43, obtaining the liquid level of the grease in the plug hole based on the grease injection unit discharging a set volume of the grease; Step S44, based on the liquid level of the grease in the plug hole being a first height that is an abnormal height, obtaining a difference between the first height and a standard liquid level; wherein the first height is lower than the standard liquid level; Step S45, based on the difference between the first height and the standard liquid level, obtaining the volume S of the grease liquid level rising from the first height to the standard liquid level; Step S46, based on S, the grease injection unit discharges S*K grease into the plug hole; wherein K>1; Step S47, based on the grease injection unit discharging S*K of grease into the plug-in hole, the bottom end of the plug-in shaft is moved from the upper end surface of the plug-in hole to the space surrounded by the second groove.

4. A universal joint assembly method according to claim 3, characterized in that: The universal joint assembly method also includes: Step S48, based on the bottom end of the plug-in shaft being moved from the upper end surface of the plug-in hole to the space surrounded by the second groove and the grease level in the plug-in hole being the abnormal height after the grease injection timing is set, obtaining the number of times N that the grease level in the plug-in hole is continuously the abnormal height after the grease injection timing is set; wherein the grease injection timing is set including the grease level in the plug-in hole before the grease injection unit discharges the grease into the plug-in hole; Step S49: Based on N being greater than a set number of times, the volume of the grease discharged by the grease injection unit is adjusted.

5. A universal joint assembly method according to claim 4, characterized in that: The step S49 comprises: Step S491, based on N being greater than a set number of times, obtaining adjustment reference data; wherein the adjustment reference data includes the temperature near the discharge port; Step S492: based on the temperature near the discharge port being lower than a set temperature range, increasing the volume of the grease discharged by the grease injection unit.

6. A universal joint assembly method according to claim 5, characterized in that: The universal joint assembly method also includes: Step S493, based on the temperature near the outlet being lower than the set temperature range, heating the outlet to the set temperature range.

7. A universal joint assembly method according to claim 6, characterized in that: The adjustment reference data in step S491 also includes the volume S1 and weight W of the grease in the storage part of the grease injection unit, and the volume S2 corresponding to the weight W of the grease in the storage part; The universal joint assembly method also includes: Step S494, based on S1>S2, obtain the difference S3 between S1 and S2; Step S495: based on the fact that S3 is greater than a set volume, the exhaust part of the grease injection unit drives the storage part to vibrate for a set time.

8. A universal joint assembly system, characterized in that: The universal joint assembly system is applied to a universal joint assembly method according to any one of claims 1 to 7, and the universal joint assembly system comprises: A shell assembly, the shell assembly comprises a shell unit and an end cover unit; the shell unit comprises an outer shell and a first raceway; the outer shell is configured as a cylindrical body; the first raceway is recessed from the inner circumference of the outer shell toward the outer circumference of the outer shell; the end cover unit comprises an end cover body and a groove module; the end cover body is fixedly connected to one end of the outer shell in the length direction; the groove module comprises a first groove and a second groove; the second groove is recessed from a side of the end cover body close to the outer shell along the axial direction of the outer shell toward a direction away from the outer shell; the first groove is recessed from a side of the end cover body close to the outer shell along the axial direction of the outer shell toward a direction away from the outer shell; the first groove is arranged on the peripheral side of the second groove; the first groove is connected to the second groove; A rolling assembly, the rolling assembly comprising a star-shaped sleeve unit and a rolling body; the star-shaped sleeve unit comprising a star-shaped sleeve body, a second raceway and a plug-in hole; the plug-in hole penetrates from one end of the star-shaped sleeve body to the other end along the axial direction of the star-shaped sleeve body; the second raceway is recessed from the outer circumferential surface of the star-shaped sleeve body toward the plug-in hole; A plug-in shaft, the outer circumference of which is adapted to the inner circumference of the plug-in hole; A tooling assembly, the tooling assembly comprising a base unit and a grease injection unit; the base unit comprises a base, a first driving part, and a second driving part; the base is detachably connected to the first driving part and the second driving part respectively; the grease injection unit comprises a discharge port, a storage part, and grease; the grease is arranged in a space surrounded by the storage part; The universal joint assembly system includes a first assembly state and a second assembly state; the first assembly state includes the star-shaped sleeve being located in the space surrounded by the shell; the bottom end of the star-shaped sleeve being in contact with the end cover; the first raceway, the second raceway, and the rolling body being arranged correspondingly to each other; the rolling body of the rolling assembly being arranged in the space surrounded by the first raceway and the second raceway; the rolling body being in sliding connection with the first raceway and / or the rolling body being in sliding connection with the second raceway; the discharge port discharges the grease to drip onto the inner circumferential wall of the plug hole and the groove module; the second assembly state includes the star-shaped sleeve being located in the space surrounded by the shell; the bottom end of the star-shaped sleeve being in contact with the end cover The first raceway, the second raceway and the rolling body are arranged corresponding to each other; the rolling body of the rolling assembly is arranged in the space surrounded by the first raceway and the second raceway; the rolling body is slidably connected to the first raceway and / or the rolling body is slidably connected to the second raceway; the outer peripheral wall of the plug-in shaft abuts against the inner peripheral wall of the plug-in hole; the bottom end of the plug-in shaft is moved from the upper end surface of the plug-in hole to the space surrounded by the second groove, and during the movement of the plug-in shaft, the grease in the plug-in hole and the grease in the groove module move from the first groove to the space between the outer peripheral surface of the star-shaped sleeve unit of the rolling assembly and the inner peripheral surface of the shell unit of the shell assembly.

9. A universal joint assembly system according to claim 8, characterized in that: When the bottom end of the star-shaped sleeve unit abuts against the bottom end of the space enclosed by the shell assembly, the first groove is located within the projection area of ​​the second raceway in the direction from the shell to the end cover body.

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