Safety groove structure for recirculating ball steering gear

Abstract

The utility model discloses a safety groove structure for a recirculating ball steering gear, and relates to the related technical field of automobile steering gears. The steering gear comprises a steering gear body, a fixing ring, an outer mounting shaft and a spline shaft, an output shaft is fixed to the output end of the steering gear body, the outer mounting shaft is arranged at the end, away from the steering gear body, of the output shaft, an annular safety groove is formed in the circumferential side of the output shaft, and the fixing ring is fixed in the annular safety groove; a connecting ring is fixed to the end, close to the input shaft, of the spline shaft, and a fragile ring is fixed to the end, away from the spline shaft, of the connecting ring. By arranging the steering gear main body, the fixing ring, the outer mounting shaft and the spline shaft, the problems that whether the recirculating ball steering gear is damaged after being impacted is difficult to see through the appearance and the spline shaft is inconvenient to replace after being damaged are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to automobile steering gears, and particularly relates to a safety groove structure for a circulating ball steering gear. Background Art

[0002] The steering gear is also called steering machine or steering gear. It is the most important part of the car steering system. Its function is to increase the force transmitted from the steering wheel to the steering transmission mechanism and change the direction of force transmission. The recirculating ball steering gear is mainly composed of screw, nut, steering gear housing and many small steel balls. Compared with the rack and pinion steering gear, the recirculating ball steering gear relies more on rolling friction, so it has higher transmission efficiency, is lighter and more comfortable to operate, has less wear on mechanical parts, and has a relatively long service life. In the past, when there was no power steering, the recirculating ball steering gear occupied a dominant position, but it still has the following disadvantages in actual use:

[0003] When the steering torque is input into the recirculating ball steering gear, the output torque is sent to the steering mechanism, which drives the steering mechanism of the car to drive the wheels to rotate. When the car is in an accident, the system that is most severely impacted is the steering system of the car. When the steering gear is impacted, some internal failures are not easy to find in the early stage and do not affect the function of the steering system, but delayed failures will occur later, which will cause hidden dangers to the driving safety of the vehicle;

[0004] When the output shaft of the recirculating ball steering gear is slightly damaged due to an accident or other factors, the spline shaft on it needs to be replaced. When replacing the spline shaft, the steering gear needs to be disassembled in a complicated manner for replacement, and replacing the spline shaft is not convenient enough. Utility Model Content

[0005] The utility model aims to provide a safety groove structure for a recirculating ball steering gear. By arranging a steering gear body, a fixing ring, an external mounting shaft and a spline shaft, the utility model solves the problems that it is difficult to see from the appearance whether the recirculating ball steering gear is damaged after being impacted, and it is inconvenient to replace the spline shaft after it is damaged.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a safety groove structure for a recirculating ball steering gear, comprising a steering gear body, a fixing ring, an outer mounting shaft and a spline shaft, wherein an output shaft is fixed on an output end of the steering gear body, an outer mounting shaft is arranged on an end of the output shaft away from the steering gear body, an annular safety groove is provided on the circumferential side of the output shaft, a fixing ring is fixed in the annular safety groove, a spline shaft is fixed on the circumferential side of the outer mounting shaft, a connecting ring is fixed on an end of the spline shaft close to an input shaft, and a fragile ring is fixed on an end of the connecting ring away from the spline shaft. During operation, after power is input through the steering gear body, the output shaft is driven to rotate, and the rotation of the output shaft drives the outer mounting shaft and the spline shaft to rotate. When the spline shaft rotates, it is impacted and subjected to force, thereby destroying the force balance between the fragile ring and the fixed block, causing the fragile ring to break, indicating that damage may be caused in the steering gear body and that maintenance is required.

[0008] Furthermore, a socket is provided at one end of the output shaft away from the steering gear body, a screw hole is provided in the socket on one side close to the steering gear body, the output shaft is movably connected to the plug block through the socket, and is threadedly connected to the mounting bolt through the screw hole.

[0009] Furthermore, both ends of the steering gear body are fixed with cover plates, and the input end of the steering gear body is fixed with an input shaft, which is inserted into a cover plate. The steering gear body provides the function of disassembling and repairing the steering gear body through the cover plate, and power is input into the steering gear body through the input shaft to drive the steering gear body to work.

[0010] Furthermore, fixed blocks are fixed on the circumferential side of the fixed ring in a circular array, a pressure rod is fixed on the side of the fixed block close to the external mounting shaft, the pressure rod abuts against one end of the fragile ring close to the steering gear body, the fixed ring is connected to the pressure rod via the fixed block, and the pressure rod is pressed onto the fragile ring, and after the force balance between the pressure rod and the fragile ring is destroyed, the fragile ring is cracked.

[0011] Furthermore, an insert block is fixed to one end of the outer mounting shaft close to the steering gear body, and the insert block is inserted into the socket on the output shaft. A mounting bolt is inserted through the insert block and the outer mounting shaft along the inner central axis of the outer mounting shaft. The mounting bolt is threaded in the screw hole. The outer mounting shaft is inserted into the socket through the insert block, and the outer mounting shaft and the output shaft are installed together with the mounting bolt.

[0012] Furthermore, a through opening is formed in the spline shaft along the central axis, the outer mounting shaft is fixed in the through opening, and the spline shaft is fixed to the peripheral side of the outer mounting shaft through the through opening.

[0013] The utility model has the following beneficial effects:

[0014] The utility model solves the problem that it is difficult to see from the appearance whether a circulating ball steering gear is damaged after being impacted by arranging a steering gear main body, a fixed ring, an outer mounting shaft and a spline shaft. When the steering mechanism is working, the outer mounting shaft is impacted due to an accident and generates a slight bend, which drives the angle between the fragile ring and the fixed ring to change. The force balance between the pressure rod connected to the fixing block on the peripheral side of the fragile ring and the fixed ring is destroyed, causing the fragile ring to be crushed. The force direction of the outer mounting shaft is determined by the position of the broken fragile ring, and the corresponding direction structure in the steering gear main body that needs to be repaired when repairing is determined, so that when working, it is more convenient to see from the appearance whether the circulating ball steering gear is damaged after being impacted.

[0015] The utility model solves the problem of inconvenience in replacing the damaged spline shaft on the circulating ball steering gear by arranging a steering gear main body, an outer mounting shaft and a spline shaft. When replacing the spline shaft, the spline shaft is held, an inner hexagonal wrench is inserted into the mounting bolt, and then rotated to separate the mounting bolt and the output shaft, and then an insert block is pulled out from the socket on the output shaft, and a new insert block on the outer mounting shaft is inserted into the socket on the output shaft, and then the mounting bolt is inserted into the outer mounting shaft, and then inserted into the insert block, and then screwed into the screw hole in the socket on the output shaft and tightened, so that the outer mounting shaft and the output shaft are connected together, making it more convenient to replace the damaged spline shaft on the circulating ball steering gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A three-dimensional diagram of the assembly structure of a safety groove structure for a recirculating ball steering gear;

[0018] Figure 2 for Figure 1 A magnified view of the structure at A;

[0019] Figure 3 It is a three-dimensional diagram of the main structure of the steering gear;

[0020] Figure 4 It is a three-dimensional diagram of the fixed ring structure;

[0021] Figure 5 This is a three-dimensional diagram of the external mounting shaft structure;

[0022] Figure 6 It is a three-dimensional diagram of the spline shaft structure.

[0023] Reference numerals:

[0024] 1. Steering gear body; 101. Output shaft; 102. Socket; 103. Screw hole; 104. Annular safety groove; 105. Cover plate; 106. Input shaft; 2. Fixing ring; 201. Fixing block; 202. Pressure rod; 3. External mounting shaft; 301. Insert block; 302. Mounting bolt; 4. Spline shaft; 401. Connecting ring; 402. Fragile ring; 403. Through-hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0026] See also Figure 1-6 The utility model is a safety groove structure for a recirculating ball steering gear, comprising a steering gear body 1, a fixing ring 2, an outer mounting shaft 3 and a spline shaft 4. An output shaft 101 is fixed to the output end of the steering gear body 1. After power is input to the steering gear body 1, the output shaft 101 is driven to rotate, and the power input into the steering gear body 1 is output through the output shaft 101. An outer mounting shaft 3 is arranged at one end of the output shaft 101 away from the steering gear body 1, and the outer mounting shaft 3 fixes the spline shaft 4 thereon. An annular safety groove 104 is provided on the circumferential side of the output shaft 101, and the output shaft 101 fixes the fixing ring 2 therein through the annular safety groove 104, and After the output shaft 101 and the outer mounting shaft 3 are subjected to excessive radial impact, the output shaft 101 breaks, a fixing ring 2 is fixed in the annular safety groove 104, and a fixing block 201 is fixed thereon through the fixing ring 2, a spline shaft 4 is fixed on the circumferential side of the outer mounting shaft 3, and the spline shaft 4 is connected to the steering mechanism to drive the steering mechanism to work, a connecting ring 401 is fixed to one end of the spline shaft 4 close to the input shaft 106, and the spline shaft 4 is connected to a fragile ring 402 through the connecting ring 401, and a fragile ring 402 is fixed to one end of the connecting ring 401 away from the spline shaft 4, and after the fragile ring 402 is squeezed by the unbalanced force, the fragile ring 402 breaks.

[0027] Specifically, a socket 102 is provided at one end of the output shaft 101 away from the steering gear body 1 , a screw hole 103 is provided in the socket 102 on the side close to the steering gear body 1 , the output shaft 101 is movably connected to the plug block 301 through the socket 102 , and is threadedly connected to the mounting bolt 302 through the screw hole 103 .

[0028] Furthermore, cover plates 105 are fixed to both ends of the steering gear body 1, and an input shaft 106 is fixed to the input end of the steering gear body 1. The input shaft 106 is inserted into a cover plate 105. The steering gear body 1 is sealed inside by the cover plate 105. The input shaft 106 is connected to the structure of the automobile steering column. When the steering column rotates, the input shaft 106 is driven to rotate, thereby driving the steering gear body 1 to work.

[0029] Furthermore, a fixing block 201 is fixed in a circular array on the circumferential side of the fixing ring 2, a pressure rod 202 is fixed on the side of the fixing block 201 close to the outer mounting shaft 3, the pressure rod 202 abuts against one end of the fragile ring 402 close to the steering gear body 1, the fixing ring 2 is connected to the pressure rod 202 via the fixing block 201, and abuts against the fragile ring 402 via the pressure rod 202. When the output shaft 101 and the outer mounting shaft 3 are bent by radial pressure, the force balance between the fragile ring 402 and the pressure rod 202 is destroyed, so that the fragile ring 402 can be crushed, and the direction of the force on the outer mounting shaft 3 is determined by the position where the fragile ring 402 is broken.

[0030] The operation process of this embodiment is as follows: when working, the input shaft 106 is connected to the structure of the steering column of the automobile. When the steering column rotates, the steering gear body 1 is driven to work. When the steering gear body 1 works, the output shaft 101 is driven to rotate. When the output shaft 101 rotates, the outer mounting shaft 3 is driven to rotate. When the outer mounting shaft 3 rotates, the spline shaft 4 is driven to rotate. When the spline shaft 4 rotates, the steering mechanism is driven to work. When the steering mechanism works, the outer mounting shaft 3 is impacted by an accident and slightly bent, which drives the angle between the fragile ring 402 and the fixed ring 2 to change. The fragile ring 40 2 and the force balance between the pressure rod 202 connected to the fixing block 201 on the side of the fixing ring 2 is destroyed, causing the fragile ring 402 to be crushed. The direction of the force on the outer mounting shaft 3 is determined by the position of the broken fragile ring 402, and the corresponding direction structure in the steering gear body 1 that needs to be repaired when the maintenance is carried out is determined. When the impact on the outer mounting shaft 3 is too large, the pressure on the outer mounting shaft 3 is transmitted to the output shaft 101. The excessive pressure causes the position of the annular safety groove 104 on the output shaft 101 to be disconnected, and it is determined that the structure inside the steering gear body 1 may be damaged, which may affect the operation of the steering mechanism and needs to be replaced in time. Specific embodiment 2

[0031] See also Figure 1 , 2, 4, 5, 6, on the basis of the specific embodiment 1, an insert block 301 is fixed to one end of the outer mounting shaft 3 close to the steering gear body 1, the insert block 301 is inserted into the socket 102 on the output shaft 101, and a mounting bolt 302 is inserted through the insert block 301 and the outer mounting shaft 3 along the inner center axis of the outer mounting shaft 3, the mounting bolt 302 is threadedly connected in the screw hole 103, the outer mounting shaft 3 is inserted into the socket 102 through the insert block 301, and then the mounting bolt 302 is inserted into the outer mounting shaft 3, and then inserted into the insert block 301, and then screwed into the screw hole 103 in the socket 102 on the output shaft 101 and tightened, so that the outer mounting shaft 3 and the output shaft 101 are connected together.

[0032] Specifically, a through hole 403 is formed in the spline shaft 4 along the central axis, and the outer mounting shaft 3 is fixed in the through hole 403 . When the spline shaft 4 is working, it is fixed to the peripheral side of the outer mounting shaft 3 through the through hole 403 .

[0033] The operation process of this embodiment is as follows: when working, when the fragile ring 402 connected to the outer spline shaft 4 of the outer mounting shaft 3 through the connecting ring 401 is broken, when the steering gear body 1 is inspected and there is no problem, the spline shaft 4 and the spline sleeve are separated, the spline shaft 4 is held, and the hexagonal wrench is inserted into the mounting bolt 302, and then rotated to separate the mounting bolt 302 and the output shaft 101, and then the plug block 301 is pulled out of the socket 102 on the output shaft 101, and the new plug block 301 on the outer mounting shaft 3 is inserted into the socket 102 on the output shaft 101, and then the mounting bolt 302 is inserted into the outer mounting shaft 3, and then inserted into the plug block 301, and then screwed into the screw hole 103 in the socket 102 on the output shaft 101 and tightened, so that the outer mounting shaft 3 and the output shaft 101 are connected together.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A safety groove structure for a recirculating ball steering gear, comprising a steering gear body (1), a fixing ring (2), an outer mounting shaft (3) and a spline shaft (4), characterized in that: An output shaft (101) is fixed to the output end of the steering gear body (1); an outer mounting shaft (3) is arranged at one end of the output shaft (101) away from the steering gear body (1); an annular safety groove (104) is provided on the circumference of the output shaft (101); a fixing ring (2) is fixed in the annular safety groove (104); a spline shaft (4) is fixed to the circumference of the outer mounting shaft (3); a connecting ring (401) is fixed to one end of the spline shaft (4) close to the input shaft (106); and a fragile ring (402) is fixed to one end of the connecting ring (401) away from the spline shaft (4).

2. A safety groove structure for a recirculating ball steering gear according to claim 1, characterized in that: A socket (102) is provided at one end of the output shaft (101) away from the steering gear body (1), and a screw hole (103) is provided in the socket (102) on a side close to the steering gear body (1).

3. The safety groove structure for a recirculating ball steering gear according to claim 1, characterized in that: Cover plates (105) are fixed to both ends of the steering gear body (1), an input shaft (106) is fixed to the input end of the steering gear body (1), and the input shaft (106) is inserted through a cover plate (105).

4. The safety groove structure for a recirculating ball steering gear according to claim 1, characterized in that: A fixing block (201) is fixed in an annular array on the circumference of the fixing ring (2), a pressure rod (202) is fixed on one side of the fixing block (201) close to the outer mounting shaft (3), and the pressure rod (202) abuts against one end of the fragile ring (402) close to the steering gear body (1).

5. The safety groove structure for a recirculating ball steering gear according to claim 2, characterized in that: An insert block (301) is fixed to one end of the outer mounting shaft (3) close to the steering gear body (1); the insert block (301) is inserted into a socket (102) on the output shaft (101); a mounting bolt (302) is inserted through the insert block (301) and the outer mounting shaft (3) along the inner central axis of the outer mounting shaft (3); the mounting bolt (302) is threadedly connected in the screw hole (103).

6. The safety groove structure for a recirculating ball steering gear according to claim 1, characterized in that: A through opening (403) is provided in the spline shaft (4) along the central axis, and the external mounting shaft (3) is fixed in the through opening (403).

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