CN220060387U - Transmission case with braking structure - Google Patents
Transmission case with braking structure Download PDFInfo
- Publication number
- CN220060387U CN220060387U CN202321111721.0U CN202321111721U CN220060387U CN 220060387 U CN220060387 U CN 220060387U CN 202321111721 U CN202321111721 U CN 202321111721U CN 220060387 U CN220060387 U CN 220060387U
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- brake disc
- piston
- pressure plate
- brake
- transmission shaft
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 89
- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 7
- 238000005299 abrasion Methods 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 230000006872 improvement Effects 0.000 description 7
- 239000003921 oil Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to a transmission mechanism, in particular to a transmission case with a braking structure, which comprises a shell and a transmission shaft, wherein a brake disc is sleeved on the transmission shaft, pressure plates are respectively arranged on two sides of the brake disc, a braking force supply assembly is arranged on the shell, and the braking force supply assembly is provided with a piston; the brake disc is in sliding connection with the transmission shaft, and one side of the brake disc, which is far away from the piston, is propped against a return spring, or one of the pressure plates is in sliding connection with the shell and is in transmission connection with the brake force supply assembly, and the pressure plate is propped against the return spring. When the braking state is released, the braking force supply assembly is reset, one pressure plate is driven to be rapidly separated from the brake disc, and meanwhile, the other pressure plate or the brake disc is driven to be mutually separated through the reset spring, so that the separation response speed is relatively high, the dynamic friction is not easy to generate, the abrasion speed is relatively low, the service life is relatively long, and the working stability is relatively good.
Description
Technical Field
The utility model relates to a transmission mechanism, in particular to a transmission case with a braking structure.
Background
Work vehicles such as excavators typically have higher demands on the braking system than conventional vehicles, and many excavators therefore have the opportunity to provide a braking structure on their gear boxes.
The Chinese patent with the issued publication number of CN215805893U discloses a novel transmission case parking brake, which structurally comprises: the parking brake comprises a brake shell, a brake steel sheet, friction plates, thick steel sheets, a fixed piston, a sliding piston, a disc spring, a brake rear cover, a bearing, a driving rod and an oil inlet and outlet, wherein the brake steel sheet is matched into the brake shell and is arranged at the lower end of the friction plates, the friction plates are attached to the thick steel sheets, the fixed piston is arranged above the thick steel sheets, the oil inlet and outlet are arranged between the fixed piston and the sliding piston, oil is led into the parking brake through the oil inlet and outlet, the sliding piston is pushed upwards, the disc spring deforms, the thick steel sheets move upwards along with the sliding piston under the action of a bolt, and meanwhile the friction plates also move upwards along with the sliding piston, so that the limit effect on the driving rod is canceled, and the brake can be quickly released from the driving rod through the oil. However, because the brake releases braking by means of hydraulic oil, oil is directly filled into a chamber where the friction plate is located, so that the movement resistance of the friction plate is increased, the separation speed of the friction plate is relatively low, and when the friction plate and the brake steel sheet are in a semi-separation state, dynamic friction can be generated between the friction plate and the brake steel sheet, so that the abrasion speed between the friction plate and the brake steel sheet is increased, the service life is influenced, a large amount of heat is generated, and the working stability of the hydraulic oil is influenced.
In view of the above, the present inventors have conducted intensive studies on a transmission case having a brake structure, and have produced the present utility model.
Disclosure of Invention
The utility model aims to provide a transmission case with a braking structure, which has the advantages of high corresponding speed, long service life and stable operation.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the transmission case with the braking structure comprises a shell and a transmission shaft rotationally connected to the shell, wherein a brake disc is sleeved on the transmission shaft, the brake disc is in transmission connection with the transmission shaft, pressure plates are respectively arranged on two sides of the brake disc, friction plates are respectively attached to or integrally connected with one side of each pressure plate facing to the brake disc or two sides of the brake disc, a braking force supply assembly for pressing each pressure plate on the brake disc is arranged on the shell, and the braking force supply assembly is provided with a piston fixedly connected with one pressure plate;
the pressure plate which is not connected with the piston is fixedly connected to the shell, the brake disc is simultaneously connected with the transmission shaft in a sliding manner, one side, away from the piston, of the brake disc is propped against a return spring, and one end, away from the brake disc, of the return spring is propped against the shell or the transmission shaft; or,
the brake disc is fixedly arranged relative to the transmission shaft, the pressure plate which is not connected with the piston is connected to the shell in a sliding manner and is in transmission connection with the brake force supply assembly, and the pressure plate which is not connected with the piston is propped against a reset spring which is used for pushing the pressure plate to be far away from the brake disc.
As an improvement of the utility model, the brake disc is arranged at one end of the transmission shaft, and the end face of the end of the transmission shaft sleeve, which is provided with the brake disc, is fixedly connected with a stop piece matched with the brake disc.
As an improvement of the utility model, the pressure plate is positioned outside the shell, the pressure plate which is not connected with the piston is fixedly connected with a box body which covers the brake disc, and the brake force supply assembly is indirectly arranged on the shell through being arranged on the box body.
As an improvement of the utility model, a guide pin which is parallel to the axis of the brake disc is fixedly connected between the pressure plate which is not connected with the piston and the box body, and the pressure plate connected with the piston is sleeved on the guide pin in a sliding way.
As an improvement of the utility model, the guide pins are more than two, and each guide pin is uniformly distributed around the axis of the brake disc.
As an improvement of the utility model, the braking force supply assembly further comprises a cylinder body fixedly connected to the box body, the piston is slidably connected to the cylinder body, and one end of the piston penetrates through the box body and is fixedly connected with the corresponding pressure plate.
As an improvement of the utility model, a disc spring is arranged on one side of the piston, which is far away from the brake disc, and one end of the disc spring, which is far away from the brake disc, is propped against the cylinder body.
As an improvement of the utility model, the transmission shaft is vertically arranged, and the brake disc is sleeved at the upper end of the transmission shaft.
By adopting the scheme, the utility model has the following beneficial effects:
1. through setting up reset spring and with one of them pressure disk and piston direct fixed connection, during the braking, utilize the braking power supply subassembly to drive two pressure disks and compress tightly on the brake disc, when releasing the braking state, the braking power supply subassembly resets, drives one of them pressure disk and brake disc quick separation, simultaneously through another pressure disk of reset spring drive or brake disc mutual separation, separation response speed is relatively fast, because brake disc and friction disc separation speed are fast, difficult production kinetic friction, the wearing and tearing speed is relatively slower, life is relatively higher, job stabilization nature is also relatively better.
2. Through set up the friction disc respectively in the both sides of brake disc, greatly increased braking effect, simultaneously owing to the existence of piston and reset spring, after releasing the braking, the brake disc is difficult for contacting with the friction disc under the exogenic action, effectively avoids the friction loss after the contact braking.
Drawings
FIG. 1 is a schematic illustration of a transmission brake configuration in accordance with a first embodiment;
fig. 2 is a schematic diagram of a transmission case braking structure in the second embodiment.
The labels correspond to the following:
10-a housing; 20-a transmission shaft;
21-a transmission end cover; 22-brake disc;
23-a return spring; 24-stop piece;
30-pressing plates;
31-a guide pin; 34-a box body;
35-friction plate; 40-a brake force supply assembly;
41-cylinder; 42-a piston;
43-disc spring; 51-guide post.
Detailed Description
The utility model will be further described with reference to the accompanying drawings and specific examples.
Embodiment one.
As shown in fig. 1, the transmission case with a braking structure provided in this embodiment includes a housing 10 and a transmission shaft 20 rotatably connected to the housing 10, where the housing 10 may be an integral housing or a split housing, the transmission shaft 20 is vertically arranged, such a transmission case with the transmission shaft 20 vertically arranged is a conventional transmission case, and the transmission case provided in this embodiment is a transmission case on a wheel excavator, and the transmission shaft 20 in this embodiment is an output shaft of the transmission case on the wheel excavator.
The lower end of the transmission shaft 20 is connected with a transmission end cover 21, a flange plate or a tooth sleeve which are used for being in transmission connection with a lower transmission box of the wheel type excavator, the other end of the transmission shaft 20 is sleeved with a brake disc 22 in a sliding manner, namely the brake disc 22 is sleeved at the upper end of the transmission shaft 20. The brake disc 22 is in driving connection with the transmission shaft 20, that is, the brake disc 22 is in driving connection with the transmission shaft 20 and is also in sliding connection with the transmission shaft 20, specifically, the brake disc 22 and the transmission shaft 20 can be in driving connection through a pin structure or a spline structure, so that the brake disc 22 and the transmission shaft 20 can be in sliding connection with each other. In this embodiment, the two are connected by a spline structure, that is, an external spline section is provided on the transmission shaft 20, an internal spline hole matched with the external spline section is provided in the middle of the brake disc 22, the internal spline hole is a through hole, the external spline section is inserted into the internal spline hole, and the length of the external spline section is greater than the depth of the internal spline hole.
The brake disc 22 is also necessarily located outside the housing 10 by providing the pressure plates 30 on both axial sides of the brake disc 22, i.e., two pressure plates 30, with both pressure plates 30 being located outside the housing 10 (i.e., no space is left in the interior of the housing 10), which facilitates installation and maintenance. The friction plates 35 are attached to or integrally connected to one side of each pressure plate 30 facing the brake disc 22 or to both sides of the brake disc 22, respectively, and naturally, when the friction plates 35 are integrally connected to the pressure plate 30 or the brake disc 22, the case where the entire pressure plate 30 or the entire brake disc 22 is used as the friction plates is included. The housing 10 is further provided with a brake force supply assembly 40 for driving each pressure plate 30 to slide towards the brake disc 22, the brake force supply assembly 40 is provided with a piston 42 fixedly connected with one pressure plate 30, the moving direction of the piston 42 is the same as the axial direction of the brake disc 22 and is positioned at one side of the brake disc 22 far away from the housing 10, so that one pressure plate 30 is directly driven to move by the piston 42, and the pressure plate 30 which is not connected with the piston 42 is fixedly connected with the housing 10. In addition, the side of the brake disc 22 remote from the piston 42 is biased against the return spring 23, and the end of the return spring 23 remote from the brake disc 22 is biased against the housing 10 or the drive shaft 20. The number of the reset springs 23 can be multiple, the reset springs 23 are uniformly distributed by taking the transmission shaft 20 as the center, and one end of each reset spring 23 far away from the brake disc 22 is propped against the shell 10 through an end face bearing; in this embodiment, the return spring 23 mainly comprises two disc springs stacked on each other, the return spring sleeve 23 is arranged on the transmission shaft 20, and one end of the return spring 23 away from the brake disc 22 directly abuts against the shoulder of the transmission shaft 20 or indirectly abuts against the shoulder of the transmission shaft 20 through a gasket. In addition, the end surface of the transmission shaft 20, which is sleeved with one end of the brake disc 22, is fixedly connected with a stop piece 24 matched with the brake disc 22, so as to prevent the brake disc 22 from sliding off the transmission shaft 20.
Preferably, the housing 34 that encloses the brake disc 22 and the other pressure plate 30 is fixedly connected to the pressure plate 30 that is not connected to the piston 42 (i.e., the pressure plate fixedly connected to the housing 10) such that the brake disc 22 is exposed, and the brake force applying assembly 40 is indirectly disposed on the housing 10 by being mounted to the housing 34. Guide pins 31 which are arranged in parallel with the axis of the brake disc 22 are fixedly connected between the pressure plate 30 which is not connected with the piston 42 (namely, the pressure plate fixedly connected to the shell 10) and the box 34, more than two guide pins 31 are arranged, each guide pin 31 is uniformly distributed around the axis of the brake disc 22, and of course, each guide pin 31 can be unevenly distributed or only one guide pin can be arranged; the pressure plates 30 connected with the pistons 42 are simultaneously slidably sleeved on the guide pins 31, so that not only can the corresponding pressure plates 30 be prevented from rotating, but also the sliding guide function can be realized.
The brake force supply assembly 40 with the piston 42 may be a conventional assembly, such as a hydraulic or pneumatic cylinder. In this embodiment, the brake force supply assembly 40 includes a piston 42 and a cylinder 41 fixedly connected to the case 34, where the piston 42 is slidably connected to the cylinder 41, one end of the piston 42 passes through the case 34 and is fixedly connected to the corresponding pressure plate 30 through a bolt, and the other end of the piston 42 is fixedly connected to or integrally connected with a piston rod, and the piston rod is slidably inserted into the cylinder 41 and is connected to a power member (not shown in the figure), where the power member is a conventional hand brake mechanism or a thrust mechanism (such as an electric push rod, etc.), and of course, the power member may also be oil for driving the piston to slide, which will not be described in detail herein. Further, a disc spring 43 is provided on a side of the piston 42 remote from the brake disc 22, and an end of the disc spring 43 remote from the brake disc 22 abuts against the cylinder 41 for providing braking force.
When braking is needed, the power piece and/or the disc spring 43 drives the pressure plate 30 connected with the piston 42 to be pressed on the brake disc 22 through the piston 42, and pushes the brake disc 22 to slide and be pressed on the other pressure plate 30, and the brake disc 22 can be locked and can not rotate due to the existence of the friction plate 35, so that the transmission shaft 20 connected with the transmission shaft can not rotate, and braking is realized. When the brake is required to be released, the piston 42 is reset to drive the pressure plate 30 connected with the piston to reset, the brake disc 22 is reset under the action of the reset spring 23, the response speed is relatively high, the dynamic friction is not easy to generate, the abrasion speed is relatively low, the service life is relatively long, and the working stability is relatively good.
Embodiment two.
As shown in fig. 2, the difference between the transmission case with a braking structure provided in this embodiment and the first embodiment is that the brake disc 22 in this embodiment is fixedly connected to the transmission shaft 20, rather than being slidably connected to the transmission shaft 20, that is, the brake disc 22 and the transmission shaft 20 are fixedly arranged relative to each other, and a specific fixed connection manner may be a conventional manner, for example, welding or key connection, etc., in this embodiment, the brake disc 22 and the transmission shaft 20 are connected by a spline, an end surface of the transmission shaft 20, on which one end of the brake disc 22 is sleeved, is fixedly connected with a stop piece 24, and one end of the brake disc 22 abuts against a shoulder of the transmission shaft, and the other end abuts against the stop piece 24, so as to limit the brake disc 22 to slide relative to the transmission shaft 20, thereby realizing a fixed connection.
In addition, in the present embodiment, the pressure plate 30 that is not connected to the piston 42 is not fixedly connected to the housing 10, but is slidingly connected to the housing 10 and is in driving connection with the brake force supply assembly 40, specifically, the pressure plate 30 that is not connected to the piston 42 is located between the brake disc 22 and the housing 10, the housing 10 is fixedly connected to the guide posts 51 that are arranged around the brake disc 22, one end of each guide post 51 that is far away from the housing 10 is provided with an outer convex ring, the pressure plate 30 that is not connected to the piston 42 is slidingly sleeved on each guide post 51 to realize sliding connection with the housing 10, meanwhile, the pressure plate 30 that is not connected to the piston 42 is abutted against the return springs 23 that are used for pushing the pressure plate 30 in a direction away from the brake disc 22, the number of the return springs 23 is the same as the number of the guide posts 51 and is sleeved on each guide post 51 one by one, and one end of each return spring 23 that is far away from the pressure plate 30 that is not connected to the piston 42 is respectively abutted against the corresponding outer convex ring.
When braking is needed, the power piece and/or the disc spring 43 drives the pressure plate 30 connected with the piston 42 to be pressed on the brake disc 22 through the piston 42, meanwhile, under the action of the disc spring 43, the cylinder 41 slides relative to the piston 42 in a direction away from the brake disc 22, and then the other pressure plate 30 is driven by the box 34 to slide relative to the shell 10 and then be pressed on the brake disc 22, and due to the friction plate 35, the brake disc 22 is locked and cannot rotate, so that the transmission shaft 20 fixedly connected with the brake disc cannot rotate, and braking is realized. When the brake is required to be released, the piston 42 is reset to drive the pressure plate 30 connected with the piston to reset, and the other pressure plate 30 is reset under the action of the reset spring 23, so that the response speed is relatively high, the dynamic friction is not easy to generate, the abrasion speed is relatively low, the service life is relatively long, and the working stability is relatively good.
The present utility model has been described in detail with reference to the accompanying drawings, but the embodiments of the present utility model are not limited to the above embodiments, and those skilled in the art can make various modifications to the present utility model according to the prior art, which are all within the scope of the present utility model.
Claims (8)
1. The transmission case with the braking structure comprises a shell and a transmission shaft rotationally connected to the shell, and is characterized in that a brake disc is sleeved on the transmission shaft, the brake disc is in transmission connection with the transmission shaft, pressure plates are respectively arranged on two sides of the brake disc, friction plates are respectively attached to or integrally connected with one side of each pressure plate facing to the brake disc or two sides of the brake disc, a braking force supply assembly for pressing each pressure plate on the brake disc is arranged on the shell, and the braking force supply assembly is provided with a piston fixedly connected with one pressure plate;
the pressure plate which is not connected with the piston is fixedly connected to the shell, the brake disc is simultaneously connected with the transmission shaft in a sliding manner, one side, away from the piston, of the brake disc is propped against a return spring, and one end, away from the brake disc, of the return spring is propped against the shell or the transmission shaft; or,
the brake disc is fixedly arranged relative to the transmission shaft, the pressure plate which is not connected with the piston is connected to the shell in a sliding manner and is in transmission connection with the brake force supply assembly, and the pressure plate which is not connected with the piston is propped against a reset spring which is used for pushing the pressure plate to be far away from the brake disc.
2. The transmission case with a brake structure according to claim 1, wherein the brake disc is disposed at one end of the transmission shaft, and a stop piece matched with the brake disc is fixedly connected to an end surface of the end of the transmission shaft sleeve, where the brake disc is disposed.
3. A transmission case with a braking structure according to claim 1 or 2, wherein the pressure plate is located outside the housing, the pressure plate which is not connected with the piston is fixedly connected with a case body which covers the brake disc, and the braking force supply assembly is indirectly arranged on the housing by being mounted on the case body.
4. A transmission case with a brake structure according to claim 3, wherein a guide pin arranged in parallel with the axis of the brake disc is fixedly connected between the pressure plate which is not connected with the piston and the case body, and the pressure plate connected with the piston is slidably sleeved on the guide pin.
5. The transmission having a brake structure of claim 4, wherein there are more than two guide pins, each guide pin being evenly distributed about an axis of the brake disc.
6. A transmission having a brake mechanism as recited in claim 3, wherein said brake force assembly further comprises a cylinder fixedly attached to said housing, said piston being slidably attached to said cylinder, and one end of said piston passing through said housing and being fixedly attached to a corresponding said pressure plate.
7. The transmission case with a brake structure according to claim 6, wherein a disc spring is provided on a side of the piston away from the brake disc, and an end of the disc spring away from the brake disc abuts against the cylinder.
8. The transmission case with a brake structure according to claim 1, wherein the transmission shaft is vertically arranged, and the brake disc is sleeved on an upper end of the transmission shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321111721.0U CN220060387U (en) | 2023-05-10 | 2023-05-10 | Transmission case with braking structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321111721.0U CN220060387U (en) | 2023-05-10 | 2023-05-10 | Transmission case with braking structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220060387U true CN220060387U (en) | 2023-11-21 |
Family
ID=88759687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321111721.0U Active CN220060387U (en) | 2023-05-10 | 2023-05-10 | Transmission case with braking structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220060387U (en) |
-
2023
- 2023-05-10 CN CN202321111721.0U patent/CN220060387U/en active Active
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