Automobile screw-in type gear shifting limiter
By installing guidance columns in the body of the limited position of the car in the car, conduct the guidance and limit of the return spring, solve the wear problem caused by the back spring side bending, and extend the service life of the equipment.
Patent Information
- Application Number
- CN202420877134.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-25
AI Technical Summary
In existing automotive screw-in shift limiters, the return spring is prone to bend sideways during long-term use, resulting in an increase in contact surfaces, accelerated wear, and reduced service life.
Install the guidance column in the body of the limiter shell, and set the end of the back spring on the guide column. The guidance column uses the guidance and limit position of the return spring to reduce its side curved range.
Through guidance and limit, the side curvature of the return spring is reduced, the wear is reduced, and the service life of the shifting limiter is prolonged.
Smart Images
Figure CN222415936U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile gearboxes, in particular to an automobile screw-in type gear shift limiter. Background Art
[0002] Automobile transmissions, especially manual transmissions, usually use automobile shift limiters to implement automobile transmission shifting operations and stabilize the position of the transmission fork.
[0003] The prior art discloses a kind of automobile screw-in shift limiter, comprising a shift limiter housing, a screw-in outer sleeve of the shift limiter housing and a shift limiter push rod, wherein the shift limiter housing is a hollow cylindrical structure, and the shift limiter push rod comprises a push rod load-bearing end and a push rod connecting end, wherein an arc surface groove is provided on the end surface of the push rod load-bearing end, a load-bearing steel ball is provided in the arc surface groove, and a columnar groove is provided on the end surface of the push rod connecting end, and a return spring is provided in the columnar groove. The push rod is elastically connected with the shift limiter housing, which greatly extends the effective working stroke of the automobile shift limiter, and has the characteristics of simple and reliable structure and wide application range.
[0004] In the device, a return spring is used to connect the shift limiter push rod and the shift limiter housing, so that the push rod and the shift limiter housing form an elastic connection. However, when the return spring is used for a long time, it is difficult to keep the force uniform. In addition, due to its own aging, the return spring may bend laterally. If the lateral bending amplitude is too large, it is easy to cause an increase in the contact surface between the return spring and the shift limiter push rod. When the return spring is compressed and extended, the contact surface of the two will wear faster, thereby reducing the service life of the shift limiter.
[0005] Therefore, it is necessary to provide a kind of automobile screw-in type shift limiter to solve the above-mentioned technical problems. Utility Model Content
[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an automobile screw-in shift limiter which can guide and limit the return spring and reduce the lateral bending amplitude of the return spring.
[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0008] The invention discloses a screw-in shift limiter for automobile, comprising: an outer sleeve, a limiter housing and a push rod. The outer side of the outer sleeve is provided with an external thread for screw-in connection with the gearbox. The limiter housing is installed in the outer sleeve. One end of the limiter housing is open. The push rod is slidably installed in the limiter housing. A load-bearing steel ball is installed at the outer end of the push rod. An installation groove is provided at one end of the push rod. A return spring is installed in the installation groove. The other end of the return spring is connected to the inner wall of the limiter housing. A guide column is installed at one end of the inner wall of the limiter housing. One end of the return spring is sleeved on the guide column.
[0009] Preferably, a first steel ball sleeve is mounted on the push rod.
[0010] Preferably, a second steel ball sleeve is nested and installed at one end of the limiter housing close to the opening.
[0011] Preferably, a slot is provided at one end of the push rod, and a load-bearing steel ball is embedded in the slot. A plurality of arc grooves with different diameters are provided in the slot, and a plurality of wear-resistant steel balls are installed in the arc groove. The plurality of wear-resistant steel balls in the same arc groove form a supporting plane, and the load-bearing steel balls are supported by the plurality of supporting planes.
[0012] Preferably, a limit flange is provided at one end of the push rod, which is arranged on the inner side of the first steel ball sleeve, and a limit ring is installed at the open end of the limiter housing, and the limit ring is arranged on the outer side of the second steel ball sleeve.
[0013] Preferably, one end of the guide post is chamfered.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] (1) The utility model installs a guide column in the limiter housing, and sleeves one end of the return spring on the guide column, and uses the guide column to guide and limit the return spring, so that the lateral bending amplitude of the return spring is small, which is beneficial to reduce wear and prolong the service life of the shift limiter;
[0016] (2) The utility model can achieve rolling connection between the push rod and the limiter housing by providing a first steel ball sleeve and a second steel ball sleeve which are installed separately, which is beneficial to reduce the friction between the two and increase the effective stroke of the shift limiter;
[0017] (3) The utility model provides a card slot, an arc groove and a wear-resistant steel ball, and uses a plurality of wear-resistant steel balls installed in the arc groove to support the load-bearing steel ball, thereby effectively reducing the wear of the load-bearing steel ball and facilitating the improvement of the service life of the shift limiter;
[0018] (4) The utility model can limit the first and second steel ball sleeves by providing a limit ledge and a limit ring, thereby improving the use stability of the shift limiter;
[0019] (5) The utility model provides a chamfer on the guide column, and utilizes the guidance of the chamfer to reduce the possibility of the return spring getting stuck. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A structural schematic diagram of the automobile screw-in shift limiter provided by the utility model;
[0021] Figure 2 for Figure 1A partial cross-sectional structural diagram of a screw-in shift limiter for an automobile shown;
[0022] Figure 3 for Figure 1 The schematic diagram of the cross-sectional structure of the automobile screw-in shift limiter shown in the figure;
[0023] Figure 4 for Figure 1 The schematic diagram of the structure of the push rod in the automobile screw-in shift limiter is shown.
[0024] Among them, the names corresponding to the figure numbers are: 1-outer sleeve, 2-limiter housing, 3-push rod, 4-installation groove, 5-return spring, 6-guide column, 7-load-bearing steel ball, 8-first steel ball sleeve, 9-second steel ball sleeve, 10-slot, 11-arc groove, 12-wear-resistant steel ball, 13-limiting eaves, 14-limiting ring. DETAILED DESCRIPTION
[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The present invention includes but is not limited to the following embodiments.
[0026] Embodiment 1:
[0027] like Figure 1-4 As shown, the automobile screw-in shift limiter provided by the utility model comprises: a jacket 1, a limiter housing 2 and a push rod 3. The outer side of the jacket 1 is provided with an external thread for screw-in connection with the gearbox. The limiter housing 2 is installed in the jacket 1. One end of the limiter housing 2 is open. The push rod 3 is slidably installed in the limiter housing 2. A load-bearing steel ball 7 is installed at the outer end of the push rod 3. A mounting groove 4 is provided at one end of the push rod 3. A return spring 5 is installed in the mounting groove 4. One end of the return spring 5 is connected to the inner wall of one end of the limiter housing 2. In order to facilitate viewing, the return spring 5 is divided into two sections in the figure. In fact, the return spring 5 is a whole. A guide column 6 is installed at one end of the inner wall of the limiter housing 2. The length of the guide column 6 is less than the limit compression length of the return spring 5. One end of the return spring 5 The end sleeve is arranged on the guide column 6. When shifting gears, the load-bearing steel ball 7 is pushed by the shift fork, causing the push rod 3 to move into the limiter housing 2, thereby causing the return spring 5 to be compressed. During the compression process of the return spring 5, the guide column 6 located in the middle of the return spring 5 can guide and limit the compression direction of the return spring 5, so that the lateral bending amplitude of the return spring 5 due to uneven force during long-term use will not be too large, and the return spring 5 can be compressed and extended normally, so that the return spring 5 will not contact the inner wall of the mounting groove 4 after lateral bending (small bending amplitude). Therefore, the contact surface between the return spring 5 and the push rod 3 will not increase, and the wear between the two will not be accelerated, which is beneficial to prolonging the service life of the shift limiter.
[0028] By installing a guide column 6 in the limiter housing 2 and sleeve one end of the return spring 5 on the guide column 6, the guide column 6 is used to guide and limit the return spring 5, so that the lateral bending amplitude of the return spring 5 is smaller, which is beneficial to reduce wear and extend the service life of the shift limiter.
[0029] Embodiment 2:
[0030] like Figure 2-3 As shown, a first steel ball sleeve 8 (also called a ball sleeve, retaining frame, retaining ring, etc.) is installed on the push rod 3, and a second steel ball sleeve 9 is nested and installed near the opening end of the limiter housing 2. The first steel ball sleeve 8 and the second steel ball sleeve 9 make the push rod 3 and the limiter housing 2 rollingly connected, which is beneficial to reduce the friction between the two, and the first steel ball sleeve 8 and the second steel ball sleeve 9 can be lubricated by adding grease to further reduce the friction, and there is no spring group or other components between the first steel ball sleeve 8 and the second steel ball sleeve 9, so that when the push rod 3 moves outward and the first steel ball sleeve 8 contacts one end of the second steel ball sleeve 9, the stroke of the push rod 3 reaches the maximum, thereby increasing the stroke of the load-bearing steel ball 7, that is, increasing the effective stroke of the shift limiter.
[0031] By providing the first steel ball sleeve 8 and the second steel ball sleeve 9 which are installed separately, the push rod 3 and the limiter housing 2 can be connected in a rolling manner, which is beneficial to reducing the friction between the two and improving the effective stroke of the shift limiter.
[0032] Embodiment 3:
[0033] like Figure 3-4 As shown, a slot 10 is provided at one end of the push rod 3, and the load-bearing steel ball 7 is embedded in the slot 10. A plurality of arc grooves 11 with different diameters are provided in the slot 10, and a plurality of wear-resistant steel balls 12 are installed in the arc groove 11. The plurality of wear-resistant steel balls in the same arc groove 11 form a supporting plane, and the load-bearing steel ball 7 is supported by the plurality of supporting planes, so that the load-bearing steel ball 7 is effectively supported by the plurality of supporting surfaces, and the wear-resistant steel ball 12 can move and rotate along the arc groove 11, so that the wear between the load-bearing steel ball 7 and the slot 10 is further reduced.
[0034] By providing the card slot 10, the arc groove 11 and the wear-resistant steel ball 12, the multiple wear-resistant steel balls 12 installed in the arc groove 11 are used to support the load-bearing steel ball 7, which effectively reduces the wear of the load-bearing steel ball 7 and is beneficial to improving the service life of the shift limiter.
[0035] Embodiment 4:
[0036] like Figure 3-4As shown, a limiting eave 13 is provided at one end of the push rod 3, which is arranged on the inner side of the first steel ball sleeve 8. A limiting ring 14 is installed at the open end of the limiter housing 2, and the limiting ring is arranged on the outer side of the second steel ball sleeve 9. The limiting eave 13 and the limiting ring 14 are used to limit the first steel ball sleeve 8 and the second steel ball sleeve 9 on both sides, so that the first steel ball sleeve 8 and the second steel ball sleeve 9 are not easy to fall off, thereby improving the use stability of the shift limiter.
[0037] By providing the limiting eaves 13 and the limiting rings 14, the first steel ball sleeve 8 and the second steel ball sleeve 9 can be limited on both sides, thereby improving the use stability of the shift limiter.
[0038] Embodiment 5:
[0039] like Figure 2-3 As shown, one end of the guide column 6 is chamfered, so when the return spring 5 is bent sideways, under the action of the chamfer, the return spring 5 can still pass through the guiding transition effect of the chamfer, so that it can slide normally on the guide column 6 without getting stuck.
[0040] By providing a chamfer on the guide column 6 and utilizing the guidance of the chamfer, the possibility of the return spring 5 getting stuck is reduced.
[0041] Working principle: When in use, the load-bearing steel ball 7 is pushed by the shift fork, causing the push rod 3 to move into the limiter housing 2, thereby causing the return spring 5 to be compressed. During the compression of the return spring 5, the guide column 6 located in the middle of the return spring 5 can guide and limit the compression direction of the return spring 5, so that the lateral bending amplitude of the return spring 5 due to uneven force during long-term use will not be too large, and the return spring 5 can be compressed and extended normally, so that the return spring 5 will not contact the inner wall of the mounting groove 4 after a small lateral bending occurs. Therefore, the contact surface between the return spring 5 and the push rod 3 will not increase, and the wear between the two will not be accelerated, which is beneficial to extend the service life of the shift limiter.
Claims
1. An automobile screw-in shift limiter, characterized in that: include: A jacket (1), a stopper housing (2) and a push rod (3); The outer sleeve (1) is provided with an external thread, the limiter housing (2) is installed in the outer sleeve (1), one end of the limiter housing (2) is open, the push rod (3) is slidably installed in the limiter housing (2), the outer end of the push rod (3) is installed with a load-bearing steel ball (7), one end of the push rod (3) is provided with a mounting groove (4), a return spring (5) is installed in the mounting groove (4), one end of the return spring (5) is connected to the inner wall of the limiter housing (2), a guide column (6) is installed on the inner wall of the limiter housing (2), and one end of the return spring (5) is sleeved on the guide column (6).
2. The automobile screw-in shift limiter according to claim 1, characterized in that: The push rod (3) is sleeved with a first steel ball sleeve (8).
3. The automobile screw-in shift limiter according to claim 1, characterized in that: A second steel ball sleeve (9) is nested and installed at one end of the limiter housing (2).
4. The automobile screw-in shift limiter according to claim 1, characterized in that: A slot (10) is provided at one end of the push rod (3), the load-bearing steel ball (7) is embedded and installed in the slot (10), a plurality of arc grooves (11) with different diameters are provided in the slot (10), a plurality of wear-resistant steel balls (12) are installed in the arc grooves (11), and the plurality of wear-resistant steel balls (12) in the arc grooves (11) form a supporting plane.
5. The automobile screw-in shift limiter according to claim 1, characterized in that: One end of the push rod (3) is provided with a limiting eave (13), and one end of the limiter housing (2) is installed with a limiting ring (14).
6. The automobile screw-in shift limiter according to claim 1, characterized in that: One end of the guide column (6) is chamfered.